Abolhasan, M & Wysocki, TA 2007, 'Dynamic zone topology routing protocol for MANETs', EUROPEAN TRANSACTIONS ON TELECOMMUNICATIONS, vol. 18, no. 4, pp. 351-368.
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The limited scalability of the proactive and reactive routing protocols have resulted in the introduction of new generation of routing in mobile ad hoc networks, called hybrid routing. These protocols aim to extend the scalability of such networks beyond several hundred to thousand of nodes by defining a virtual infrastructure in the network. However, many of the hybrid routing protocols proposed to date are designed to function using a common pre-programmed static zone map. Other hybrid protocols reduce flooding by grouping nodes into clusters, governed by a cluster-head, which may create performance bottlenecks or a single point of failures at each cluster-head node.We propose a new routing strategy in which zones are created dynamically, using a dynamic zone creation algorithm. Therefore, nodes are not restricted to a specific region. Additionally, nodes perform routing and data forwarding in a cooperative manner, which means that in the case failure, route recalculation is minimised. Routing overheads are also further reduced by introducing a number of GPS-based location tracking mechanisms, which reduces the route discovery area and the number of nodes queried to find the required destination.
Adistambha, K, Davis, SJ, Ritz, CH & Burnett, IS 2007, 'Query Streaming for Multimedia Query by Content from Mobile Devices', The 9th International Symposium on DSP and Communication Systems, DSPCS’2007, pp. 1-6.
Arya, V, Duffield, NG & Veitch, D 2007, 'Multicast inference of temporal loss characteristics', Performance Evaluation, vol. 64, no. 9-12, pp. 1169-1180.
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Burnham, DR, Wright, GD, Read, ND & McGloin, D 2007, 'Holographic and single beam optical manipulation of hyphal growth in filamentous fungi', Journal of Optics A: Pure and Applied Optics, vol. 9, no. 8, pp. S172-S179.
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Chen, J, Guo, Y & Zhu, J 2007, 'Development of a High-Speed Permanent-Magnet Brushless DC Motor for Driving Embroidery Machines', IEEE Transactions on Magnetics, vol. 43, no. 11, pp. 4004-4009.
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We describe the development of a permanent-magnet (PM) brushless DC motor for driving high-speed embroidery machines by employing advanced design and analysis techniques. In the design of the motor, magnetic field finite-element analyses accurately calcu
Collocott, SJ, Dunlop, JB & Watterson, PA 2007, 'Thermal and spontaneous remagnetization in ferromagnetic Nd-3(Fe,Ti)(29) and Nd-3(Fe,Re)(29)', PHYSICAL REVIEW B, vol. 76, no. 5, pp. 1-8.
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Magnetization measurements at 10 K on the dc demagnetized ferromagnetic intermetallic compounds Nd-3(Fe,Ti)(29) and Nd-3(Fe,Re)(29) are reported and reveal the phenomena of thermal and spontaneous remagnetization. For both materials, thermal remagnetizat
Di Leonardo, R, Ruocco, G, Leach, J, Padgett, MJ, Wright, AJ, Girkin, JM, Burnham, DR & McGloin, D 2007, 'Parametric Resonance of Optically Trapped Aerosols', Physical Review Letters, vol. 99, no. 1.
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Di Leonardo, R, Ruocco, G, Leach, J, Padgett, MJ, Wright, AJ, Girkin, JM, Burnham, DR & McGloin, D 2007, 'Publisher’s Note: Parametric Resonance of Optically Trapped Aerosols [Phys. Rev. Lett.99, 010601 (2007)]', Physical Review Letters, vol. 99, no. 2.
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Dou, Y, Guo, Y & Zhu, J 2007, 'Soft magnetic composite materials and their applications in electrical machines', Diangong Jishu Xuebao/Transactions of China Electrotechnical Society, vol. 22, no. 11, pp. 46-51.
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Soft magnetic composite materials (SMCs) have undergone a significant development and have been in a range of new applications in the past decade. Based on the experiences of the SMCs research group at University of Technology, Sydney, and with the analysis of many references, a comprehensive survey on the development and application of SMCs in electrical machines is presented in the paper. Both successful experiences and existing difficulties are reviewed and analyzed. It is believed that the application of SMCs is preponderant in the small motors with complex topologies. Possible further work required for the commercial success of SMCs machines is also proposed.
Dou, Y, Guo, Y, Zhu, JG & Lu, H 2007, 'Effect of Armature Reaction of a Permanent-Magnet Claw Pole SMC Motor', IEEE Transactions on Magnetics, vol. 43, no. 6, pp. 2561-2563.
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The finite-element method enables an accurate analysis for the study on effects of armature reaction in electromagnetic devices, particularly those with complex structures and three-dimensional (3-D) magnetic flux paths. This paper investigates the effec
Du, C 2007, 'Integrating affinity propagation clustering method with linear discriminant analysis for face recognition', Optical Engineering, vol. 46, no. 11, pp. 110501-110501.
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The Fisherface method suffers from the problem of using all training face images to recognize a test face image. To tackle this problem, we propose combining a novel clustering method, affinity propagation (AP), recently reported in the journal Science, with linear discriminant analysis (LDA) to form a new method, AP-LDA, for face recognition. By using AP, a representative face image for each subject can be obtained. Our AP-LDA method uses only these representative face images rather than all training images for recognition. Thus, it is more computationally efficient than Fisherface. Experimental results on several benchmark face databases also show that AP-LDA outperforms Fisherface in terms of recognition rate. © 2007 Society of Photo-Optical Instrumentation Engineers.
Eslava, S, Baklanov, MR, Kirschhock, CEA, Iacopi, F, Aldea, S, Maex, K & Martens, JA 2007, 'Characterization of a molecular sieve coating using ellipsometric porosimetry', LANGMUIR, vol. 23, no. 26, pp. 12811-12816.
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Eslava, S, Iacopi, F, Baklanov, MR, Kirschhock, CEA, Maex, K & Martens, JA 2007, 'Ultra-violet-assisted cure of spin-on silicalite-1 films', FROM ZEOLITES TO POROUS MOF MATERIALS: THE 40TH ANNIVERSARY OF INTERNATIONAL ZEOLITE CONFERENCE, PROCEEDINGS OF THE 15TH INTERNATIONAL ZEOLITE CONFERENCE, vol. 170, pp. 594-599.
Eslava, S, Iacopi, F, Baklanov, MR, Kirschhock, CEA, Maex, K & Martens, JA 2007, 'Ultraviolet-Assisted Curing of Polycrystalline Pure-Silica Zeolites: Hydrophobization, Functionalization, and Cross-Linking of Grains', Journal of the American Chemical Society, vol. 129, no. 30, pp. 9288-9289.
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Gay, VC & Leijdekkers, P 2007, 'A Health Monitoring System Using Smart Phones and Wearable Sensors', International Journal of Assistive Robotics and Mechatronic, vol. 8, no. 2, pp. 29-36.
Griffiths, H, Xu, C, Barrass, T, Cooke, M, Iacopi, F, Vereecken, P & Esconjauregui, S 2007, 'Plasma assisted growth of nanotubes and nanowires', SURFACE & COATINGS TECHNOLOGY, vol. 201, no. 22-23, pp. 9215-9220.
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Gunes, H & Piccardi, M 2007, 'Bi-modal emotion recognition from expressive face and body gestures', JOURNAL OF NETWORK AND COMPUTER APPLICATIONS, vol. 30, no. 4, pp. 1334-1345.
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Psychological research findings suggest that humans rely on the combined visual channels of face and body more than any other channel when they make judgments about human communicative behavior. However, most of the existing systems...
Guo, Y, Zhu, JG, Lin, ZW, Zhong, JJ, Lu, HY & Wang, S 2007, 'Determination of 3D magnetic reluctivity tensor of soft magnetic composite material', Journal of Magnetism and Magnetic Materials, vol. 312, no. 2, pp. 458-463.
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Soft magnetic composite (SMC) materials are especially suitable for construction of electrical machines with complex structures and three-dimensional (3D) magnetic fluxes. In the design and optimization of such 3D flux machines, the 3D vector magnetic properties of magnetic materials should be properly determined, modeled, and applied for accurate calculation of the magnetic field distribution, parameters, and performance. This paper presents the measurement of 3D vector magnetic properties and determination of 3D reluctivity tensor of SMC. The reluctivity tensor is a key factor for accurate numerical analysis of magnetic field in a 3D flux SMC motor. © 2007 Elsevier B.V. All rights reserved.
Guo, YG, Zhu, JG & Lu, HY 2007, 'Effects of Armature Reaction on the Performance of a Claw Pole Motor With Soft Magnetic Composite Stator by Finite-Element Analysis', IEEE Transactions on Magnetics, vol. 43, no. 3, pp. 1072-1077.
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We investigated the effects of armature reaction on the performance of a three-phase three-stack claw pole motor with soft magnetic composite stator core by using three-dimensional finite-element analysis (FEA), which is an effective approach to accurate
Guo, Y-J, Zhu, A-Z, Pi, Y-L & Tin-Loi, F 2007, 'Experimental study on compressive strengths of thick-walled cold-formed sections', Journal of Constructional Steel Research, vol. 63, no. 5, pp. 718-723.
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This paper describes an experimental study on the compressive strengths of cold-formed thick-walled steel sections. A total of 18 stub columns with plate thickness ranging from 8 to 12 mm were tested to determine the section capacities of the cold-formed
Ha Hoang Kha, Hoang Duong Tuan, Ba-Ngu Vo & Nguyen, TQ 2007, 'Symmetric Orthogonal Complex-Valued Filter Bank Design by Semidefinite Programming', IEEE Transactions on Signal Processing, vol. 55, no. 9, pp. 4405-4414.
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A new design method for complex-valued two-channel finite impulse response (FIR) filter banks with both orthogonality and symmetry properties is developed. Based on a novel linear matrix inequality (LMI) characterization of trigonometric curves, the opti
He, S, Wang, H, Jia, W, Wu, Q, Hur, N, Kim, J & Hintz, TB 2007, 'Uniform Image Partitioning for Fractal Compression on Virtual Hexagonal Structure', International Journal of Information and Systems Science, vol. 3, no. 3, pp. 492-509.
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Hexagonal structure is different from the traditional square structure for image representation. The geometrical arrangement of pixels on hexag-onal structure can be described in terms of a hexagonal grid. Uniformly sepa-rating image into seven similar copies with a smaller scale has commonly been used for parallel and accurate image processing including image compression on hexagonal structure. However, all the existing hardware for capturing image and for displaying image are produced based on square architecture. It has become a serious problem affecting the advanced research based on hexagonal structure. Furthermore, the current techniques used for uniform separation of images on hexagonal structure do not coincide with the rectangular shape of images. This has been an obstacle in the use of hexagonal structure for image processing. In this paper, we briefly review a newly developed virtual hexagonal structure that is scalable. Based on this virtual structure, algorithms for uni-form image separation are presented. The virtual hexagonal structure retains image resolution during the process of image separation, and does not intro-duce distortion. Furthermore, images can be smoothly and easily transferred between the traditional square structure and the hexagonal structure while the image shape is kept in rectangle. As an application of image partitioning, we present a Fractal Image Compression (FIC) method on the virtual image struc- ture by adopting Fisher's basic FIC method on the traditional square image structure. The modifcation on the definition of range block and domain block is implemented in order to utilize the enhanced image structure. The results of the FIC approach applied to testing images are analyzed and show higher fidelity.
Hoang Duong Tuan, Tran Thai Son, Ba-Ngu Vo & Nguyen, TQ 2007, 'Efficient Large-Scale Filter/Filterbank Design via LMI Characterization of Trigonometric Curves', IEEE Transactions on Signal Processing, vol. 55, no. 9, pp. 4393-4404.
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Many filter and filterbank design problems can be posed as the optimization of linear or convex quadratic objectives over trigonometric semi-infinite constraints. Recent advances in design methodology are based on various linear matrix inequality (LMI) c
Hoang, HG, Tuan, HD & Vo, B-N 2007, 'Low-Dimensional SDP Formulation for Large Antenna Array Synthesis', IEEE Transactions on Antennas and Propagation, vol. 55, no. 6, pp. 1716-1725.
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Bounding the sidelobe and mainlobe levels of an array with complex weights is attractive in that it allows direct control of the radiation pattern. In this paper we propose an efficient beamforming technique for synthesizing the patterns of large arrays
Huang, Y, Zhu, J, Guo, Y, Lin, Z & Hu, Q 2007, 'Design and Analysis of a High-Speed Claw Pole Motor With Soft Magnetic Composite Core', IEEE Transactions on Magnetics, vol. 43, no. 6, pp. 2492-2494.
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Soft magnetic composite (SMC) material is formed by surface-insulated iron powder particles, generating unique properties like magnetic and thermal isotropy, and very low eddy currents. This paper presents the design and analysis of a high-speed claw pol
Iacopi, F, Beyer, G, Travaly, Y, Waldfried, C, Gage, DM, Dauskardt, RH, Houthoofd, K, Jacobs, P, Adriaensens, P, Schulze, K, Schulz, SE, List, S & Carlotti, G 2007, 'Thermomechanical properties of thin organosilicate glass films treated with ultraviolet-assisted cure', ACTA MATERIALIA, vol. 55, no. 4, pp. 1407-1414.
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Iacopi, F, Vereecken, PM, Schaekers, M, Caymax, M, Moelans, N, Blanpain, B, Richard, O, Detavernier, C & Griffiths, H 2007, 'Plasma-enhanced chemical vapour deposition growth of Si nanowires with low melting point metal catalysts: an effective alternative to Au-mediated growth', NANOTECHNOLOGY, vol. 18, no. 50.
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Izquierdo, E 2007, 'Editorial: Knowledge Engineering, Semantics, and Signal Processing in Audio–Visual Information Retrieval', IEEE Transactions on Circuits and Systems for Video Technology, vol. 17, no. 3, pp. 257-260.
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Jia, W, Zhang, H & He, X 2007, 'Region-based license plate detection', Journal of Network and Computer Applications, vol. 30, no. 4, pp. 1324-1333.
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Automatic license plate recognition (ALPR) is one of the most important aspects of applying computer techniques towards intelligent transportation systems. In order to recognize a license plate efficiently, however, the location of the license plate, in most cases, must be detected in the first place. Due to this reason, detecting the accurate location of a license plate from a vehicle image is considered to be the most crucial step of an ALPR system, which greatly affects the recognition rate and speed of the whole system. In this paper, a region-based license plate detection method is proposed. In this method, firstly, mean shift is used to filter and segment a color vehicle image in order to get candidate regions. These candidate regions are then analyzed and classified in order to decide whether a candidate region contains a license plate. Unlike other existing license plate detection methods, the proposed method focuses on regions, which demonstrates to be more robust to interference characters and more accurate when compared with other methods. © 2006 Elsevier Ltd. All rights reserved.
Jin, JX, Liu, ZY, Guo, YG & Zhu, JG 2007, 'Power system analysis of a resistive HTS fault current limiter', Physica C: Superconductivity, vol. 460-462, no. 2, pp. 1455-1456.
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This paper investigates the performance of a prototype resistive fault current limiter (FCL) made using a high temperature superconductor (HTS). Its behavior under normal operation and short-circuit conditions in a 6 kV/1 kA power system is analyzed with
Jin, JX, Zhang, CM, Guo, YG & Zhu, JG 2007, 'HTS High Q Resonant Controller', Materials Science Forum, vol. 546-549, pp. 1979-1984.
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High Tc superconductor (HTS) technology has been used to develop an advanced high Qresonant circuit and its devices. With a HTS, a very high Q circuit can be achieved; consequentlyspecial aspects such as high voltage generation and high current control can be theoretically andpractically realized. Theoretical study has been carried out, as well as a practical approach has beenmade for the concept verification. This paper describes the theory of this high Q resonant circuit andthe operational principle of its high voltage generation and current control.
Jin, JX, Zhang, CM, Guo, YG & Zhu, JG 2007, 'Theory and Operation Principle of a HTS High Q Resonant Circuit', IEEE Transactions on Applied Superconductivity, vol. 17, no. 2, pp. 2022-2025.
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High-temperature superconductor (HTS) technology has been used to develop an advanced high Q resonant power electronic circuit and its special device. With HTS techniques, a very high Q circuit can be achieved; consequently special aspects such as high v
Kong, X, Liu, L & Lowe, D 2007, 'A web system trace model and its application to web design', Journal of Digital Information, vol. 8, no. 1, pp. 1-29.
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Traceability analysis is crucial to the development of web-centric systems, particularly those with frequent system changes, fine-grained evolution and maintenance, and high level of requirements uncertainty. A trace model at the level of the web system architecture is presented in this paper to address the specific challenges of developing web-centric systems. The trace model separates the concerns of different stakeholders in the web development life cycle into viewpoints; and classifies each viewpoint into structure and behaviour. Tracing relationships are presented along two dimensions: within viewpoints; and among viewpoints. Examples of tracing relationships are presented using UML. This trace model is demonstrated through its application to the design of a commercial web project using a web-design process. The design artifacts in each activity are transformed based on the artifacts tracing relationship in the trace model. The model provides mechanisms for verification of consistency, completeness and coverage within each viewpoint and the connectedness across viewpoints.
Kwok, NM, Ha, QP, Huang, S, Dissanayake, G & Fang, G 2007, 'Mobile robot localization and mapping using a Gaussian sum filter', INTERNATIONAL JOURNAL OF CONTROL AUTOMATION AND SYSTEMS, vol. 5, no. 3, pp. 251-268.
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A Gaussian sum filter (GSF) is proposed in this paper on simultaneous localization and mapping (SLAM) for mobile robot navigation. In particular, the SLAM problem is tackled here for cases when only bearing measurements are available. Within the stochastic mapping framework using an extended Kalman filter (EKF), a Gaussian probability density function (pdf) is assumed to describe the range-and-bearing sensor noise. In the case of a bearing-only sensor, a sum of weighted Gaussians is used to represent the non-Gaussian robot-landmark range uncertainty, resulting in a bank of EKFs for estimation of the robot and landmark locations. In our approach, the Gaussian parameters are designed on the basis of minimizing the representation error. The computational complexity of the GSF is reduced by applying the sequential probability ratio test (SPRT) to remove under-performing EKFs. Extensive experimental results are included to demonstrate the effectiveness and efficiency of the proposed techniques.
Kwok, NM, Ha, QP, Nguyen, MT, Li, J & Samali, B 2007, 'Bouc-Wen model parameter identification for a MR fluid damper using computationally efficient GA', ISA TRANSACTIONS, vol. 46, no. 2, pp. 167-179.
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A non-symmetrical Bouc-Wen model is proposed in this paper for magnetorheological (MR) fluid dampers. The model considers the effect of non-symmetrical hysteresis which has not been taken into account in the original Bouc-Wen model. The model parameters are identified with a Genetic Algorithm (GA) using its flexibility in identification of complex dynamics. The computational efficiency of the proposed GA is improved with the absorption of the selection stage into the crossover and mutation operations. Crossover and mutation are also made adaptive to the fitness values such that their probabilities need not be user-specified. Instead of using a sufficiently number of generations or a pre-determined fitness value, the algorithm termination criterion is formulated on the basis of a statistical hypothesis test, thus enhancing the performance of the parameter identification. Experimental test data of the damper displacement and force are used to verify the proposed approach with satisfactory parameter identification results. © 2007 ISA.
Lee, JE-Y, Bahreyni, B, Zhu, Y & Seshia, AA 2007, 'Ultrasensitive mass balance based on a bulk acoustic mode single-crystal silicon resonator', Applied Physics Letters, vol. 91, no. 23.
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A single-crystal silicon resonant bulk acoustic mass sensor with a measured resolution of 125pg∕cm2 is presented. The mass sensor comprises a micromachined silicon plate that is excited in the square-extensional bulk acoustic resonant mode at a frequency of 2.182MHz, with a quality factor exceeding 106. The mass sensor has a measured mass to frequency shift sensitivity of 132Hzcm2∕μg. The resonator element is embedded in a feedback loop of an electronic amplifier to implement an oscillator with a short term frequency stability of better than 7ppb at an operating pressure of 3.8mTorr.
Leung, KF, Leung, FHF, Lam, HK & Ling, SH 2007, 'Application of a modified neural fuzzy network and an improved genetic algorithm to speech recognition', NEURAL COMPUTING & APPLICATIONS, vol. 16, no. 4-5, pp. 419-431.
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This paper presents the recognition of speech commands using a modified neural fuzzy network (NFN). By introducing associative memory (the tuner NFN) into the classification process (the classifier NFN), the network parameters could be made adaptive to changing input data. Then, the search space of the classification network could be enlarged by a single network. To train the parameters of the modified NFN, an improved genetic algorithm is proposed. As an application example, the proposed speech recognition approach is implemented in an eBook experimentally to illustrate the design and its merits. © Springer-Verlag London Limited 2007.
Li, L & Paganini, F 2007, 'LMI relaxation to Riccati equations in structured H-2 control', INTERNATIONAL JOURNAL OF CONTROL, vol. 80, no. 4, pp. 527-539.
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In this paper we discuss structured [image omitted] control methods for large-scale interconnected systems. Based on a relaxation of Riccati equations, we derive some linear matrix inequality (LMI) conditions for sub-optimal controllers in which information structure can be imposed. In particular, we derive controllers by solving low-dimensional LMIs, which are decentralized except for the sharing information between neighbours, as determined by the plant interconnection; also we optimize a performance bound for each of the derived controllers.
Li, L & Ugrinovskii, VA 2007, 'On necessary and sufficient conditions for H(infinity) output feedback control of Markov jump linear systems', IEEE TRANSACTIONS ON AUTOMATIC CONTROL, vol. 52, no. 7, pp. 1287-1292.
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This note addresses the output feedback H∞ control problem for continuous-time Markov jump linear systems. It is shown that the feasibility of a certain set of linear matrix inequalities is both sufficient and necessary for the existence of a solution. Under standard assumptions, we also give a Riccati-type sufficient and necessary condition for an H∞-suboptimal controller to exist. © 2007 IEEE.
Li, L, Ugrinovskii, VA & Orsi, R 2007, 'Decentralized robust control of uncertain Markov jump parameter systems via output feedback', AUTOMATICA, vol. 43, no. 11, pp. 1932-1944.
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This paper addresses the problem of decentralized robust stabilization and control for a class of uncertain Markov jump parameter systems. Control is via output feedback and knowledge of the discrete Markov state. It is shown that the existence of a solution to a collection of mode-dependent coupled algebraic Riccati equations and inequalities, which depend on certain additional parameters, is both necessary and sufficient for the existence of a robust decentralized switching controller. A guaranteed upper bound on robust performance is also given. To obtain a controller which satisfies this bound, an optimization problem involving rank constrained linear matrix inequalities is introduced, and a numerical approach for solving this problem is presented. To demonstrate the efficacy of the proposed approach, an example stabilization problem for a power system comprising three generators and one on-load tap changing transformer is considered. © 2007 Elsevier Ltd. All rights reserved.
Li, Y, Sharp, I, Hedley, M, Ho, P & Guo, Y 2007, 'Single- and double-difference algorithms for position and time-delay calibration of transducer-elements in a sparse array', IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, vol. 54, no. 6, pp. 1188-1198.
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A method for the calibration of the position and time delay of transducer elements in a large, sparse array used for underwater, high-resolution, ultrasound imaging has been described in a previous work. This algorithm is based on the direct algorithm used in the global positioning system (GPS), but the wave propagation speed is treated as one of the to-be-calibrated parameters. In this article, the performance of two other commonly used GPS algorithms, namely the single-difference algorithm and the double-difference algorithm, is evaluated. The calibration of the propagation speed also is integrated into these two algorithms. Furthermore, a novel, least-squares method is proposed to calibrate the time delay associated with each transducer element for these two algorithms. The performances of these algorithms are theoretically analyzed and evaluated using numerical analysis and simulation study. The performance of the direct algorithm, the single-difference algorithm, and the double-difference algorithm is compared. It was found that the single-difference algorithm has the best performance among the three algorithms for the current application, and it is capable of calibrating the position and time delay of transducer elements to an accuracy of one-tenth of a wavelength.
Lin, ZW & Zhu, JG 2007, 'Three-dimensional magnetic properties of soft magnetic composite materials', Journal of Magnetism and Magnetic Materials, vol. 312, no. 1, pp. 158-163.
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A three-dimensional (3-D) magnetic property measurement system, which can control the three components of the magnetic flux density B vector and measure the magnetic field strength H vector in a cubic sample of soft magnetic material, has been developed
Lin, ZW, Zhu, JG, Guo, YG, Zhong, JJ & Lu, HW 2007, 'B and H sensors for 3-D magnetic property testing', International Journal of Applied Electromagnetics and Mechanics, vol. 25, no. 1-4, pp. 517-520.
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One and two-dimensional hysteresis properties are normally used to characterize soft magnetic materials. However, the results are not informative enough to disclose three-dimensional (3-D) hysteresis behavior under vector excitations. This paper presents
Lin, ZW, Zhu, JG, Guo, YG, Zhong, JJ & Wang, S 2007, 'Magnetic properties of soft magnetic composites under three-dimensional excitations', International Journal of Applied Electromagnetics and Mechanics, vol. 25, no. 1-4, pp. 237-241.
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Soft magnetic composite (SMC) materials are broadly used in low cost high performance electrical machines due to their magnetic isotropy, low eddy current loss, and capability to mould complex shapes. To optimise the performance of electrical machines, t
Ling, SH & Leung, FHF 2007, 'An improved genetic algorithm with average-bound crossover and wavelet mutation operations', SOFT COMPUTING, vol. 11, no. 1, pp. 7-31.
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This paper presents a real-coded genetic algorithm (RCGA) with new genetic operations (crossover and mutation). They are called the average-bound crossover and wavelet mutation. By introducing the proposed genetic operations, both the solution quality and stability are better than the RCGA with conventional genetic operations. A suite of benchmark test functions are used to evaluate the performance of the proposed algorithm. Application examples on economic load dispatch and tuning an associative-memory neural network are used to show the performance of the proposed RCGA. © Springer-Verlag 2006.
Ling, SH, Leung, FHF & Lam, HK 2007, 'Input-dependent neural network trained by real-coded genetic algorithm and its industrial applications', SOFT COMPUTING, vol. 11, no. 11, pp. 1033-1052.
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This paper presents an input-dependent neural network (IDNN) with variable parameters. The parameters of the neurons in the hidden nodes adapt to changes of the input environment, so that different test input sets separately distributed in a large domain can be tackled after training. Effectively, there are different individual neural networks for different sets of inputs. The proposed network exhibits a better learning and generalization ability than the traditional one. An improved real-coded genetic algorithm (RCGA) Ling and Leung (Soft Comput 11(1):7-31, 2007) is proposed to train the network parameters. Industrial applications on short-term load forecasting and hand-written graffiti recognition will be presented to verify and illustrate the improvement. © Springer-Verlag 2007.
Liu, RP, Rogers, G, Zhou, S & Zic, J 2007, 'Topology control with Hexagonal Tessellation', International Journal of Sensor Networks, vol. 2, no. 1/2, pp. 91-91.
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Geographic Adaptive Fidelity (GAF) is an important topology control approach in Wireless Sensor Networks. It extends the system lifetime by exploiting node redundancy However, the properties of the square grid in GAF have not been fully studied. This pape shows that there exists an unreachable corner in the GAF grid architecture. Using an analytica model, we are able to calculate the unreachable probability and analyse its impacts on dat delivery. We propose to replace the square grid of GAF with Hexagonal Tessellation (GAF-h) We then proceed to prove that GAF-h is able to achieve zero loss with little extra cost when compared to the original scheme. A node association algorithm is also proposed for efficien implementation. This algorithm is proved to integrate with the original GAF protocol with little computing overhead. © 2007 Inderscience Enterprises Ltd.
López-Mariscal, C, Gutiérrez-Vega, JC, McGloin, D & Dholakia, K 2007, 'Direct detection of optical phase conjugation in a colloidal medium', Optics Express, vol. 15, no. 10, pp. 6330-6330.
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Lorenz, RM, Edgar, JS, Jeffries, GDM, Zhao, Y, McGloin, D & Chiu, DT 2007, 'Vortex-Trap-Induced Fusion of Femtoliter-Volume Aqueous Droplets', Analytical Chemistry, vol. 79, no. 1, pp. 224-228.
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Lu, DD-C, Liu, JCP, Poon, FNK & Pong, BMH 2007, 'A Single Phase Voltage Regulator Module (VRM) With Stepping Inductance for Fast Transient Response', IEEE Transactions on Power Electronics, vol. 22, no. 2, pp. 417-424.
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Lu, H, Zhong, JJ, Guo, YG, Zhu, JG & Jin, JX 2007, 'Techniques and Apparatus for Measuring Rotational Core Losses of Soft Magnetic Materials', Journal of Electronic Science and Technology of China, vol. 5, no. 3, pp. 218-225.
Lu, HY, Zhu, JG & Hui, SYR 2007, 'Measurement and Modeling of Thermal Effects on Magnetic Hysteresis of Soft Ferrites', IEEE Transactions on Magnetics, vol. 43, no. 11, pp. 3952-3960.
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We present experimental measurement of thermal effects on magnetic hysteresis of soft ferrite cores commonly used in high-frequency inductors and transformers and propose a method to model the thermal effects. We measured the major hysteresis loops of so
Lu, HY, Zhu, JG, Guo, YG & Hui, SYR 2007, 'A Practical Circuit Model of High Frequency Transformers in Power Electronic Systems', Australian Journal of Electrical and Electronics Engineering, vol. 3, no. 3, pp. 211-223.
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Lu, S, Zhang, J & Dagan Feng, D 2007, 'Detecting unattended packages through human activity recognition and object association', Pattern Recognition, vol. 40, no. 8, pp. 2173-2184.
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This paper provides a novel approach to detect unattended packages in public venues. Different from previous works on this topic which are mostly limited to detecting static objects where no human is nearby, we provide a solution which can detect an unat
Machiraju, S, Veitch, D, Baccelli, F & Bolot, JC 2007, 'Adding definition to active probing', ACM SIGCOMM Computer Communication Review, vol. 37, no. 2, pp. 17-28.
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Active probing techniques have overwhelmingly been based on a few key heuristics. To progress to the next level a more powerful approach is needed, which is capable of filtering noise effectively, designing (and defining) optimal probing strategies, and understanding fundamental limitations. We provide a probabilistic, queueing-theoretic treatment that contributes to this program in the single hop case. We provide an exact inversion method for cross traffic distributions, rigorous system identifiability results to help determine what active probing can and can't achieve, a new approach for treating queueing theoretic 'noise' based on conditioning, and cross traffic estimators with enhanced properties
Madden, C, Cheng, ED & Piccardi, M 2007, 'Tracking people across disjoint camera views by an illumination-tolerant appearance representation', Machine Vision and Applications, vol. 18, no. 3-4, pp. 233-247.
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Tracking single individuals as they move across disjoint camera views is a challenging task since their appearance may vary significantly between views. Major changes in appearance are due to different and varying illumination conditions and the deformable geometry of people. These effects are hard to estimate and take into account in real-life applications. Thus, in this paper we propose an illumination-tolerant appearance representation, which is capable of coping with the typical illumination changes occurring in surveillance scenarios. The appearance representation is based on an online k-means colour clustering algorithm, a data-adaptive intensity transformation and the incremental use of frames. A similarity measurement is also introduced to compare the appearance representations of any two arbitrary individuals. Post-matching integration of the matching decision along the individuals' tracks is performed in order to improve reliability and robustness of matching. Once matching is provided for any two views of a single individual, its tracking across disjoint cameras derives straightforwardly. Experimental results presented in this paper from a real surveillance camera network show the effectiveness of the proposed method. © Springer-Verlag 2007.
Milne, G, Dholakia, K, McGloin, D, Volke-Sepulveda, K & Zemánek, P 2007, 'Transverse particle dynamics in a Bessel beam', Optics Express, vol. 15, no. 21, pp. 13972-13972.
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Reeve, R, van Schaik, A, Jin, C, Hamilton, T, Torben-Nielsen, B & Webb, B 2007, 'Directional hearing in a silicon cricket', Biosystems, vol. 87, no. 2-3, pp. 307-313.
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Phonotaxis is the ability to orient towards or away from sound sources. Crickets can locate conspecifics by phonotaxis to the calling (mating) song they produce, and can evade bats by negative phonotaxis from echolocation calls. The behaviour and underlying physiology have been studied in some depth, and the auditory system solves this complex problem in a unique manner. Experiments conducted on a simulation model of the system indicated that the mechanism output a directional signal to sounds ahead at calling song frequency and to sounds behind at echolocation frequencies. We suggest that this combination of responses helps simplify later processing in the cricket. To further explore this result, an analogue, very large scale integrated (aVLSI) circuit model of the mechanism was designed and built; results from testing this agreed with the simulation. The aVLSI circuit was used to test a further hypothesis about the potential advantages of the positioning of the acoustic inputs for sound localisation during walking. There was no clear advantage to the directionality of the system in their location. The aVLSI circuitry is now being extended to use on a robot along with previously modelled neural circuitry to better understand the complete sensorimotor pathway. © 2006 Elsevier Ireland Ltd. All rights reserved.
Richard, O, Iacopi, F, Bender, H & Beyer, G 2007, 'Sidewall damage in silica-based low-k material induced by different patterning plasma processes studied by energy filtered and analytical scanning TEM', MICROELECTRONIC ENGINEERING, vol. 84, no. 3, pp. 517-523.
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Roughan, M & Veitch, D 2007, 'Some remarks on unexpected scaling exponents', ACM SIGCOMM Computer Communication Review, vol. 37, no. 5, pp. 71-74.
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Sharma, A, Bhattacharya, D & Agrawal, A 2007, 'Analytical computation of the propagation matrix for the finite-difference split-step non-paraxial method', Optical and Quantum Electronics, vol. 39, no. 7, pp. 623-626.
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Su, SW, Wang, L, Celler, BG & Savkin, AV 2007, 'Oxygen uptake estimation in humans during exercise using a Hammerstein model', ANNALS OF BIOMEDICAL ENGINEERING, vol. 35, no. 11, pp. 1898-1906.
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This paper aims to establish a block-structured model to predict oxygen uptake in humans during moderate treadmill exercises. To model the steady state relationship between oxygen uptake (oxygen consumption) and walking speed, six healthy male subjects w
Su, SW, Wang, L, Celler, BG, Savkin, AV & Guo, Y 2007, 'Identification and control for heart rate regulation during treadmill exercise', IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING, vol. 54, no. 7, pp. 1238-1246.
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Thomas-Kerr, JAI, Burnett, IS, Ritz, CH, Devillers, S, De Schrijver, D & Van de Walle, R 2007, 'Is That a Fish in Your Ear? A Universal Metalanguage for Multimedia', IEEE MultiMedia, vol. 14, no. 2, pp. 72-77.
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Trinh, H & Ha, QP 2007, 'State and input simultaneous estimation for a class of time-delay systems with uncertainties', IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS, vol. 54, no. 6, pp. 527-531.
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This brief addresses the problem of estimation of both the states and the unknown inputs of a class of systems that are subject to a time-varying delay in their state variables, to an unknown input, and also to an additive uncertain, nonlinear disturbance. Conditions are derived for the solvability of the design matrices of a reduced-order observer for state and input estimation, and for the stability of its dynamics. To improve computational efficiency, a delay-dependent asymptotic stability condition is then developed using the linear matrix inequality formulation. A design procedure is proposed and illustrated by a numerical example. © 2007, IEEE. All rights reserved.
Wang, S, Dash, M, Chia, L-T & Xu, M 2007, 'Efficient sampling of training set in large and noisy multimedia data', ACM Transactions on Multimedia Computing, Communications, and Applications, vol. 3, no. 3, pp. 14-14.
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As the amount of multimedia data is increasing day-by-day thanks to less expensive storage devices and increasing numbers of information sources, machine learning algorithms are faced with large-sized and noisy datasets. Fortunately, the use of a good sampling set for training influences the final results significantly. But using a simple random sample (SRS) may not obtain satisfactory results because such a sample may not adequately represent the large and noisy dataset due to its blind approach in selecting samples. The difficulty is particularly apparent for huge datasets where, due to memory constraints, only very small sample sizes are used. This is typically the case for multimedia applications, where data size is usually very large. In this article we propose a new and efficient method to sample of large and noisy multimedia data. The proposed method is based on a simple distance measure that compares the histograms of the sample set and the whole set in order to estimate the representativeness of the sample. The proposed method deals with noise in an elegant manner which SRS and other methods are not able to deal with. We experiment on image and audio datasets. Comparison with SRS and other methods shows that the proposed method is vastly superior in terms of sample representativeness, particularly for small sample sizes although time-wise it is comparable to SRS, the least expensive method in terms of time.
Weily, AR, Esselle, KP, Bird, TS & Sanders, BC 2007, 'Dual resonator 1-D EBG antenna with slot array feed for improved radiation bandwidth', IET MICROWAVES ANTENNAS & PROPAGATION, vol. 1, no. 1, pp. 198-203.
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Yan, M, Shao, KR, Hu, XW, Guo, Y, Zhu, J & Lavers, JD 2007, 'Z-Transform-Based FDTD Analysis of Perfectly Conducting Cylinder Covered With Unmagnetized Plasma', IEEE Transactions on Magnetics, vol. 43, no. 6, pp. 2968-2970.
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In this paper, a novel and normalized Z-transform-based finite-difference time-domain (ZTFDTD) method is presented for simulating the interaction of the electromagnetic (EM) wave with unmagnetized plasma. The 2-D ZTFDTD formulations for unmagnetized plas
Yokoi, K, Hung, NVQ, Tuan, HD & Hosoe, S 2007, 'ADAPTIVE CONTROL DESIGN FOR NONLINEARLY PARAMETERIZED SYSTEMS WITH A TRIANGULAR STRUCTURE', Asian Journal of Control, vol. 9, no. 2, pp. 121-132.
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ABSTRACTA novel adaptive backstepping design for a class of nonlinearly parameterized systems with a triangular structure is proposed. Under the Lipschitz condition with respect to unknown parameters of the system, an effective adaptive controller is designed without the requirement on the compactness of the unknown parametric set. Especially, the proposed adaptive control enables the advantage of “tuning function concept”, which results in only one estimation law for the unknown parameters. Our simulation with induction motor model particularly shows the viability of the obtained results.
You Guang Guo, Jian Xun Jin, Jian Guo Zhu & Hai Yan Lu 2007, 'Design and Analysis of a Prototype Linear Motor Driving System for HTS Maglev Transportation', IEEE Transactions on Applied Superconductivity, vol. 17, no. 2, pp. 2087-2090.
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High temperature superconductors (HTSs) can produce a strong magnetic levitation force with self-stabilizing feature and hence have attracted much attention for applications in maglev transportation systems. For the linear motion of transportation, a lin
Zhan, YD, Zhu, JG & Guo, YG 2007, 'Development of Advanced Hardware and Software for Proton Exchange Membrane Fuel Cell Test Systems', Australian Journal of Electrical and Electronics Engineering, vol. 3, no. 3, pp. 201-209.
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A fuel cell test system that is powered by proton exchange membrane fuel cells (PEMFCs) has been developed. It consists of two parts: hardware units and software programs. The hardware units contain a PEMFC stack, water-cooling components, air-cooling, hydrogen humidifying and filtering, temperature and pressure monitoring, and voltage and current measuring of the stack. The software programs, developed according to the features of the PEMFC stack, are used to control the whole process. The software programs are composed of the control interface of the PEMFC test system and controllers, such as the basic measurements and control tools, proportional-integral- derivative (PID) controller, fuzzy logic controller, and other advanced controllers. The system can supply 500 W of DC 20 V / 30 A power continuously by using hydrogen. This paper describes a high-efficiency development method, and PID and fuzzy-PI controller design, which are suitable for various applications in experiment and study of PEMFC engineering. The test system has a good human-machine interface. It is easy to operate and control all kinds of parameters and variables, and clearly shows the charts and graphs. By using this test system, a lot of research projects can be conducted in the field of PEMFC in the future.
Zhang, H, Jia, W, He, X & Wu, Q 2007, 'Learning-based license plate detection in vehicle image database', International Journal of Intelligent Information and Database Systems, vol. 1, no. 2, pp. 228-228.
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This paper proposes a learning-based algorithm to detect license plates of vehicles from vehicle image database. There are three main contributions in this paper. The first contribution is to define a novel vertical edge map, which makes the image processing more effectively. The second contribution is to propose a learning-based cascade classifier composing of two kinds of sub-classifiers, which makes the system very robust. The third contribution is to experimentally estimate the parameter of scaling factor and chose an optimal one for the algorithm to seek a good balance between detection rate and processing time. © 2007 Inderscience Enterprises Ltd.
Zhang, H, Wong, K-YK & Zhang, G 2007, 'Camera Calibration from Images of Spheres', IEEE Transactions on Pattern Analysis and Machine Intelligence, vol. 29, no. 3, pp. 499-502.
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This paper introduces a novel approach for solving the problem of camera calibration from spheres. By exploiting the relationship between the dual images of spheres and the dual image of the absolute conic (IAC), it is shown that the common pole and polar with regard to the conic images of two spheres are also the pole and polar with regard to the IAC. This provides two constraints for estimating the IAC and, hence, allows a camera to be calibrated from an image of at least three spheres. Experimental results show the feasibility of the proposed approach. © 2007 IEEE.
Zhang, Y, Shao, KR, Guo, Y, Zhu, J, Xie, DX & Lavers, JD 2007, 'A Comparison of Point Interpolative Boundary Meshless Method Based on PBF and RBF for Transient Eddy-Current Analysis', IEEE Transactions on Magnetics, vol. 43, no. 4, pp. 1497-1500.
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This paper presents the boundary polynomial point interpolation meshless method (BPPIM) and the boundary radial point interpolation meshless method (BRPIM) based on the polynomial basis function (PBF) and radial basis function (RBF), respectively, for tr
Zhang, Y, Shao, KR, Guo, Y, Zhu, J, Xie, DX & Lavers, JD 2007, 'An Improved Multiquadric Collocation Method for 3-D Electromagnetic Problems', IEEE Transactions on Magnetics, vol. 43, no. 4, pp. 1509-1512.
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The multiquadric radial basis function method (MQ RBF or, simply, MQ) developed recently is a truly meshless collocation method with global basis functions. It was introduced for solving many 1- and 2-D partial differential equations (PDEs), including li
Zhao, C, Wang, S, Qiu, J, Zhu, JG, Guo, Y, Gong, W & Cao, Z 2007, 'Correction to: 'Transient simulation and analysis for saturated core high temperature superconducting fault current limiter'', IEEE Transactions on Magnetics, vol. 43, no. 8, pp. 3540-3540.
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Zhao, C, Wang, S, Qiu, J, Zhu, JG, Guo, Y, Gong, W & Cao, Z 2007, 'Transient Simulation and Analysis for Saturated Core High Temperature Superconducting Fault Current Limiter', IEEE Transactions on Magnetics, vol. 43, no. 4, pp. 1813-1816.
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In this paper, the transient performance of a magnetic core fault current limiter (FCL) saturated by high temperature superconducting (HTS) dc bias winding is investigated by using both 3-D field-circuit coupled simulation and magnetic circuit analysis. A high voltage is induced on the dc HTS winding during the fault current state. The induced voltage is computed and a short circuit coil for the reduction of induced voltage is studied. The numerical computations are verified by the experiment results on an FCL prototype. © 2007 IEEE.
Zhao, Y, Edgar, JS, Jeffries, GDM, McGloin, D & Chiu, DT 2007, 'Spin-to-Orbital Angular Momentum Conversion in a Strongly Focused Optical Beam', Physical Review Letters, vol. 99, no. 7.
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Zhu, Y, Lee, J & Seshia, A 2007, 'System-level simulation of a micromachined electrometer using a time-domain variable capacitor circuit model', Journal of Micromechanics and Microengineering, vol. 17, no. 5, pp. 1059-1065.
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Abolhasan, M, Wang, JC-P & Franklin, DR 1970, 'On Indoor Multi-hopping capacity of Wireless Ad-Hoc Mesh Networks.', MASS, MASS 2007, IEEE Computer Society, Pisa, Italy, pp. 1-6.
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The capacity and multi-hopping performance of ad hoc mesh networks in dynamic environment still remains an open research issue. Previous theoretical studies suggest that they do not scale in densely distributed networks. However, a study has shown that scalability and hence the multi- hopping capacity of mesh network is not only bound by the number of nodes in the network but also the number of hops [3]. In this paper we investigate the performance of multi- hop ad hoc mesh networks, using both simulation studies and an experimental test-bed, and monitor the performance of the network as the number of hops in the network increases. Our results show that the drop in performance in multi-hopping is much more significant when the traffic levels are high. Furthermore our test-bed study shows that ad hoc mesh networks can maintain high levels of packet delivery and throughput when traffic levels are low, however, the delay experienced continues to increase after each hop.
Abolhasan, M, Wang, JC-P, Franklin, DR & IEEE 1970, 'On indoor multi-hopping capacity of wireless ad-hoc mesh networks', 2007 IEEE INTERNATIONAL CONFERENCE ON MOBILE AD-HOC AND SENSOR SYSTEMS, VOLS 1-3, IEEE International Conference on Mobile Adhoc and Sensor Systems, IEEE, Pisa, ITALY, pp. 917-922.
Adistambha, K, Doeller, M, Tous, R, Gruhne, M, Sano, M, Tsinaraki, C, Christodoulakis, S, Yoon, K, Ritz, CH & Burnett, IS 1970, 'The MPEG-7 query format: a new standard in progress for multimedia query by content', 2007 International Symposium on Communications and Information Technologies, 2007 International Symposium on Communications and Information Technologies, IEEE, Sydney, AUSTRALIA, pp. 479-+.
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Adistamblta, K, Ritz, CH & Burnett, IS 1970, 'MQF: An XML based multimedia query format', Proceedings of the 2007 IEEE International Conference on Multimedia and Expo, ICME 2007, IEEE International Conference on Multimedia and Expo (ICME 2007), IEEE, Beijing, PEOPLES R CHINA, pp. 264-267.
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MQF is a new XML based format designed to facilitate communication between disparate systems for applications involving multimedia query by content. Currently no standardized protocol exists which are able to provide flexibility in formulation of a query, such as the combination of any multimedia format (image, video, sound) to serve as query terms, combined with very complicated query conditions that can utilize a hierarchy of meta-search engines. In this work, we propose MQF as a flexible solution to serve as a communication format between a client and server for use in content based multimedia searching. © 2007 IEEE.
Agbinya, JI, Reisenfeld, S, Malaney, R, Dutkiewicz, E, Challa, S, Al-Jumaily, A, Ahmed, AA, Lal, S, Braun, R, Chaczko, Z, Sevimli, O, Sithamparanathan, K & Manteuffel, D 1970, 'General Organising Committee', The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007), The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007), IEEE.
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Ahmad, MR, Dutkiewicz, E & Xiaojing Huang 1970, 'BER-delay characteristics analysis of IEEE 802.15.4 wireless sensor networks with cooperative MIMO', 2007 Asia-Pacific Conference on Applied Electromagnetics, 2007 Asia-Pacific Conference on Applied Electromagnetics (APACE), IEEE.
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This paper presents a study of the impact of transmission delay differences between co-operating nodes on bit error rate performance and energy consumption of wireless sensor networks. We consider a wireless sensor network using an Alamouti virtual MIMO (multiple-input multiple-output) configuration between collaborating nodes operating in quasi-static Rayleigh flat-fading channels. Our results show that above certain delay difference (in the range above 0.75Tb), the traditional non-cooperative approach is more energy-efficient than the cooperative strategy and that the transmission delay difference has the most significant on the transmission energy consumption in the delay range of below 0.75Tb. © 2007 IEEE.
Baccelli, F, Machiraju, S, Veitch, D & Bolot, JC 1970, 'On optimal probing for delay and loss measurement', Proceedings of the 7th ACM SIGCOMM conference on Internet measurement, IMC07: Internet Measurement Conference, ACM, ACM, pp. 291-302.
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Burnham, DR & McGloin, D 1970, 'Holographic optical manipulation of aerosols', 2007 European Conference on Lasers and Electro-Optics and the International Quantum Electronics Conference, 2007 European Conference on Lasers and Electro-Optics and the International Quantum Electronics Conference, IEEE.
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Burnham, DR & McGloin, D 1970, 'Holographic optical manipulation of aerosols', Optics InfoBase Conference Papers.
Burnham, DR, McGloin, D, Wright, GD & Read, ND 1970, 'Holographic optical manipulation of hyphal growth in filamentous fungi', Optics InfoBase Conference Papers.
Chaczko, Z, Chiang, F & Braun, R 1970, 'Active MIB: Addressing Challenges of Wireless Mesh Networks', Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), International Conference on Computer Aided Systems Theory, Springer Berlin Heidelberg, Las Palmas de Gran Canaria, Spain, pp. 1199-1207.
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There is a list of very much needed object-oriented and autonomous paradigms that are currently absent from traditional implementations of MIBs in telecommunication systems. We argue that some of autonomous features can be inherent in an application otf an Active MIB mechanism itself, and thus this type of application would be a more appropriate substrate in which to model, develop and integrate the benefits brought by the object-oriented approach. In our work, we claim that active networks are such an application area, in which the object-oriented and autonomous system ideas can be successfully applied. The objective of this research paper is to demonstrate applicability and compatibility of the AMIB concept with functional and architectural requirements of wireless mesh networks. This paper introduces new approaches for using AMIB-based mechanisms in telecommunication networks as well as discusses autonomic processes and algorithms that can be used to manage such networks. © Springer-Verlag Berlin Heidelberg 2007.
Chaczko, Z, Klempous, R, Nikodem, J & Nikodem, M 1970, 'Methods of Sensors Localization in Wireless Sensor Networks', 14th Annual IEEE International Conference and Workshops on the Engineering of Computer-Based Systems (ECBS'07), 14th Annual IEEE International Conference and Workshops on the Engineering of Computer-Based Systems (ECBS'07), IEEE, pp. 145-152.
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In recent years there has been a growing interest in wireless sensor networks (WSN) applications. Such sensor networks can be used to control temperature, humidity, contamination, pollution etc. Self-organization and routing algorithms dedicated to wireless sensor networks usually assume that sensors absolute positions are unknown and all decisions are based on sensor's own local information. This assumption makes wireless sensor networks more flexible and energy conserve because making decisions locally is faster and energy efficient. But sooner or later sensors positions have to be found (when sensor sends a message about some event we of course would like to know where this event takes place). In this paper we describe different solutions of finding transceivers positions in wireless networks and we discuss localization in wireless sensor networks. We propose to transfer localization function from base stations to every sensor. We evaluate presented method using simulations. © 2007 IEEE.
Chan, KY, Ling, SH, Chan, KW, Iu, HHC, Pong, GTY & IEEE 1970, 'Solving multi-contingency transient stability constrained optimal power flow problems with an improved GA', 2007 IEEE CONGRESS ON EVOLUTIONARY COMPUTATION, VOLS 1-10, PROCEEDINGS, IEEE Congress on Evolutionary Computation, IEEE, Singapore, SINGAPORE, pp. 2901-2908.
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Chan, KY, Ling, SH, Iu, HHC, Kwong, CK & IEEE 1970, 'A GA-based data mining approach to process improvement of fluid dispensing for electronic packaging', 2007 IEEE CONGRESS ON EVOLUTIONARY COMPUTATION, VOLS 1-10, PROCEEDINGS, IEEE Congress on Evolutionary Computation, IEEE, Singapore, SINGAPORE, pp. 4350-4357.
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Chandru, R & Zhu, JG 1970, 'A high frequency SIMULINK model for PMSM for a new sensorless rotor detection technique', Australian Journal of Electrical and Electronics Engineering, Informa UK Limited, pp. 77-82.
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A new concept of high frequency small-signal phase inductance (L ss) of Permanent Magnet Synchronous Motor (PMSM) is defined in this paper. The Lss of a Soft Magnetic Composite (SMC) motor was mapped in the experiment and the results were used to build a high frequency SIMULINK model for the simulation of a new sensorless rotor detection scheme. A new sensorless detection scheme is also proposed in this paper. © Institution of Engineers.
Chen, J, Guo, Y & Zhu, J 1970, 'An improved Phase Variable Model Based on Electro-magnetic Field Coupled with its External Circuits for Performance Evaluation of Permanent Magnet Brushless DC Motors', 2007 2nd IEEE Conference on Industrial Electronics and Applications, 2007 2nd IEEE Conference on Industrial Electronics and Applications, IEEE, Harbin, China, pp. 955-959.
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This paper presents the comprehensive performance evaluation of a brushless permanent magnet (PM) DC (BLDC) motor in dynamic conditions by an improved phase variable model based on electro-magnetic field coupled with its external circuits. In the proposed model, the inductances, back electromotive force (emf) and cogging torque are obtained by nonlinear finite element analysis (FEA). The phase variable model is built and implemented in the MATLAB/Simulink through a method of look-up table to decide the emf which depends on rotor position. Furthermore, based on a mathematical function for the decision to the voltage of the three phase winding central point, the model could not only solve the problem to decide the input voltage of the phase which is in a non-energized condition, and also make the transient current process during the commutation clear. The theoretical verification is also given in detail. By using the developed model, the comprehensive performance of BLDC motors could be investigated.
Chen, J, Guo, Y, Zhu, J & Jin, J 1970, 'Heavy Load Simulation Model of Flyback Switching DC-DC Converters and its Application for Reliability Improvement', 2007 IEEE Industry Applications Annual Meeting, 2007 IEEE Industry Applications Annual Meeting, IEEE, New Orleans, USA, pp. 2295-2302.
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This paper presents the simulation model of flyback switching DC-DC converters operating in heavy load modes, and the application of the model in the converter design for improving the system reliability. To derive the simulation model, different operational modes and atomic circuit blocks (ACB) are established first. Then, the state-machine of the system is studied. Finally, the transfer function of each ACB is determined, and according to the relationship among the ACBs, the complete simulation model is built, which can be used for transient analysis during starting, the operation in the under-voltage mode or over-current mode. Furthermore, the heavy load simulation model is applied to calculate the maximum steady-state power loss of the output diode, one of the key factors for thermal analysis which is crucial for the system reliability. The effect of time delay is also considered. By modifying the parameters of a physical flyback converter according to the simulation results, the converter reliability is significantly improved. The theoretical analysis is verified by experimental results.
Chen, J, Guo, Y, Zhu, J & Jin, J 1970, 'Heavy Load Simulation Model of Flyback Switching DC-DC Converters and its Application for Reliability Improvement', 2007 IEEE Industry Applications Annual Meeting, 2007 IEEE Industry Applications Annual Meeting, IEEE.
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Chen, J, Guo, Y, Zhu, J & Jin, J 1970, 'Performance Analysis of a Surface Mounted Permanent Magnet Brushless DC Motor Using an Improved Phase Variable Model', 2007 IEEE Industry Applications Annual Meeting, 2007 IEEE Industry Applications Annual Meeting, IEEE.
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Chen, J, Guo, Y, Zhu, J & Jin, J 1970, 'Performance Analysis of a Surface Mounted Permanent Magnet Brushless DC Motor Using an Improved Phase Variable Model', 2007 IEEE Industry Applications Annual Meeting, 2007 IEEE Industry Applications Annual Meeting, IEEE, New Orleans, USA, pp. 2169-2174.
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This paper presents the performance analysis of a high-speed surface mounted permanent magnet (PM) brushless DC motor by using an improved phase variable model. Magnetic field finite element analyses are conducted to accurately calculate key motor parameters such as air gap flux, back electromotive force and inductance, and their dependence on rotor position and magnetic saturation. To evaluate the comprehensive performance of the motor, especially the motor output at high-speed operation, which is affected by the dynamic inductances, an improved phase variable model is derived. In the model, the rotor position dependence of the key parameters is taken into account. The motor prototype has been constructed and tested with both a dynamometer and a high-speed embroidery machine, validating successfully the theoretical calculations.
Chen, J, Zhu, J & Guo, Y 1970, 'A 2-D nonlinear FEA tool embedded in Matlab/Simulink surrounding for application of electromagnetic field analysis in power converters', Proceeding of International Conference on Electrical Machines and Systems, ICEMS 2007, International Conference on Electrical Machines and Systems, IEEE, Seoul, Korea, pp. 1423-1427.
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This paper presents a 2-D nonlinear finite element analysis (FEA) tool embedded in Matlab/Simulink surrounding for the application of electromagnetic field analysis in power converters. Comparing with other FEA tools such as ANSYS and ANSOFT, as different control arithmetic has been realized in Matlab/Simulink surrounding, the significant advance by using the FEA tool embedded in Matlab/Simulink surrounding is that the field analysis can be more easily interfaced with the external control arithmetic. Considering that the characteristics of most field analyses in power converters which are static electromagnetic equipments, not only the general application procedure of the 2-D FEA tool is introduced, but also some improvements for strengthening its function is proposed. As an example, the proposed model is implemented for the performance analysis of a flyback switching AC-DC converter. By running the proposed model in Simulink surrounding, several performances can be obtained efficiently.
Chen, J, Zhu, J & Guo, Y 1970, 'A 2-D nonlinear FEA tool embedded in Matlab/Simulink surrounding for application of electromagnetic field analysis in power converters', 2007 INTERNATIONAL CONFERENCE ON ELECTRICAL MACHINES AND SYSTEMS, VOLS 1-4, International Conference on Electrical Machines and Systems, IEEE, Seoul, SOUTH KOREA, pp. 694-+.
Chen, J, Zhu, J & Guo, Y 1970, 'A general method for deciding the input filter capacitance of flyback switching AC-DC converter with peak current-controlled mode', 2007 INTERNATIONAL CONFERENCE ON POWER ELECTRONICS AND DRIVE SYSTEMS, VOLS 1-4, 7th International Conference on Power Electronics and Drive Systems (PEDS 2007), IEEE, Bangkok, THAILAND, pp. 510-+.
Chen, J, Zhu, J & Guo, Y 1970, 'A General Method for Deciding the Input Filter Capacitance of Flyback Switching AC-DC Converter with Peak Current-Controlled Mode', 2007 7th International Conference on Power Electronics and Drive Systems, 2007 7th International Conference on Power Electronics and Drive Systems, IEEE, Bangkok, Thailand, pp. 279-283.
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This paper presents a general method for deciding the input filter capacitance of flyback switching ac- dc converters with peak current-controlled mode. Firstly, a simulation model for flyback ac-dc converter is obtained by adding the rectifier and filter circuit to a flyback dc-dc converter model developed by the authors. The simulation results show that the processes of capacitor charging and discharging are independent, their boundary is near the maximal value of input voltage, and the part of flyback dc- dc converter can be seen as an approximately constant power load. Secondly, an analytic model for deciding the input power of flyback dc-dc converter with rated load and different input dc voltages is presented. Furthermore, the effect caused by the parasitical parameters in the electronic parts is studied, and the corresponding analytical method for deciding the input filter capacitance is given. The effect on the capacitance caused by the control delay is analyzed qualitatively.
Chen, J, Zhu, J & Guo, Y 1970, 'A unified hybrid model with two level networks for peak current mode controlled buck-boost converters operating in DCM and CCM', 2007 INTERNATIONAL CONFERENCE ON ELECTRICAL MACHINES AND SYSTEMS, VOLS 1-4, International Conference on Electrical Machines and Systems, IEEE, Seoul, SOUTH KOREA, pp. 1-+.
Chen, J, Zhu, J & Guo, Y 1970, 'Modeling and performance analysis of energy regeneration system in electric vehicle with permanent magnet DC motor driving system', 2007 INTERNATIONAL CONFERENCE ON ELECTRICAL MACHINES AND SYSTEMS, VOLS 1-4, International Conference on Electrical Machines and Systems, IEEE, Seoul, SOUTH KOREA, pp. 1663-+.
Chen, J, Zhu, J & Guo, Y 1970, 'Modeling and performance analysis of energy regeneration system in electric vehicle with permanent magnet DC motor driving system', Proceeding of International Conference on Electrical Machines and Systems, ICEMS 2007, International Conference on Electrical Machines and Systems, IEEE, Seoul, Korea, pp. 2051-2056.
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This paper presents the modeling and performance analysis of energy regeneration system (ERS) of electric vehicle with permanent magnet DC motor driving system. Based on the boost equivalent circuit with average current mode controlled ERS, a detailed switching model (DSM) is built to predict the dynamical performance. The DSM includes four blocks: system dynamics block, permanent magnet DC motor block, boost converter block and system performance calculation block. An automatic mechanism of linearizing the nonlinear system at the local operating point is enrolled to obtain the small signal average model (SSAM) of ERS, by which the frequency domain performance can be acquired. The proposed models are implemented in MATLAB/Simulink. By running the simulation model, several important performances of ERS are obtained.
Chen, J, Zhu, J, Guo, Y & Jin, J 1970, 'Performance Analysis of Energy Regeneration System of Electric Vehicle with Two Wheels under the Mode of Constant Braking Torque', 2007 2nd IEEE Conference on Industrial Electronics and Applications, 2007 2nd IEEE Conference on Industrial Electronics and Applications, IEEE, Harbin, China, pp. 891-895.
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A comprehensive performance analysis is crucial for advance a system to a practical level. This paper presents the performance analysis of energy regeneration system (ERS) of electric vehicle (EV) with two wheels under the model of constant braking torque (CBT). For this, a boost equivalent circuit for main power case (MPC) of ERS is obtained firstly, and then a large signal time domain average model of MPC, which constitutes the complete model of ERS along with the other three parts: system dynamics model, permanent dc motor driving system model and system performance calculation model, is given here. During modeling ERS, a new method based on state forecast viewer is proposed to identify the state (CCM or DCM) of the MPC. As a nonlinear system, the large signal time domain model of ERS can't be transferred to frequency domain model and implemented in MATLAB/Simulink directly, a method of dividing the system into a slow variable system and a fast variable system is introduced. By running this simulation model, several important performances of ERS are obtained efficiently.
Chen, JX, Guo, YG & Zhu, JG 1970, 'A general method for designing the transformer of flyback converters based on nonlinear FEA of electromagnetic field coupled with external circuit', Proceeding of International Conference on Electrical Machines and Systems, ICEMS 2007, International Conference on Electrical Machines and Systems, IEEE, Seoul, Korea, pp. 195-199.
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This paper presents a general method for designing the transformer of flyback switching AC-DC converters based on nonlinear finite element analysis (FEA) of electromagnetic field coupled with external circuit. For that, the variation patterns of the PWM duty ratio and the current flowing through the windings of transformer versus the input voltage are introduced first, and then several important principles for the design of the transformer are given by using analytical method. As the magnetic saturation and control delay possess heavy influence on the safety of the operation, a MATLAB/Simulink based simulation model, in which both the nonlinear differential inductance and the control delay are included, is built to predict the converter transient performance. The nonlinear differential inductance is calculated by a general program of nonlinear 2-D FEA in Matlab/Simulink surrounding. By running the model, the performances of the converter with different loads and input voltages are obtained. Simulation results are in good agreement with theoretical analysis.
Chen, JX, Zhu, JG & Guo, YG 1970, 'A unified hybrid model with two level networks for peak current mode controlled buck-boost converters operating in DCM and CCM', Proceeding of International Conference on Electrical Machines and Systems, ICEMS 2007, International Conference on Electrical Machines and Systems, IEEE, Seoul, Korea, pp. 186-190.
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Theis paper presents a unified hybrid model with two level networks for peak current mode controlled buck-boost converters operating in continuous conduction mode (CCM) and discontinuous conduction mode (DCM). It is a network model with two levels in which both a detailed switching model and a small signal average model are included correspondingly. The nonlinearity of some electronic components and the parasitical effects of circuit elements are considered. The nonlinear inductance is calculated by finite element analysis (FEA). The dynamical performance of the buck-boost converter can be obtained from the detailed switching model in the first level network, and then the frequency domain performance can be obtained from the average model in the second level network. As an automatic mechanism of exchanging data between two models is proposed, all the performances can be obtained automatically. By implementing the proposed model in Simulink surrounding, both the large signal transient performance and the frequency domain behavior of converters are obtained efficiently.
Chen, Y, Wu, Q & He, X 1970, 'Study on human behaviour retrieval', Proceedings of the 2007 International Conference on Image Processing, Computer Vision, and Pattern Recognition, IPCV 2007, International Conference on Image Processing, Computer Vision and Pattern Recognition, CSREA Press, Las Vegas, pp. 448-454.
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Human behavior analysis is a hot topic in computer vision and is applied widely in many applications. Human behavior retrieval is another frontier technology in the area of multimedia information retrieval, which is related to human behavior analysis but holds several differences because of its special application purpose. Human behaviour retrieval to some extent is similar to human behaviour analysis, but the technology used for human behavior analysis cannot be used for human behavior directly. This paper will address such kind of differences and review several technologies including video retrieval, feature extraction, similarity measure and human behavior analysis. This paper will also address the importance of human behaviour retrieval. The ideas unveiled by this paper will benefit the research community and indicate a direction of human behavior retrieval research.
Chen, Y, Wu, Q, He, S, Jia, W & Hintz, TB 1970, 'Pixel Structure Based on Hausdorff Distance for Human Detection in Outdoor Environments', Digital Image Computing Techniques and Applications, Digital Image Computing Techniques and Applications, IEEE Computer Society, Glenelg, Australia, pp. 67-72.
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This paper proposes a novel method for human detection from static images based on pixel structure of input images. In training stage, all sample images consisting of human images and non-human images are used to construct a Hausdorff distance map based on statistically analyzing the difference between the different blocks on each original image. A projection matrix will be created with Linear Discriminant Method (LDM) based on the Hausdorff distance map. This projection matrix will be used to transform multidimensional feature vectors (distance maps of testing images) into a feature in a one-dimensional domain. The decision will be made on the simple one dimensional feature domain according to a precalculated threshold to distinguish human figures from non-human figures. In comparison with the common method based on Mahalanobis distance maps, the proposed method based on Hausdorff distance maps performs much better. Encouraging experimental results have been obtained using 800 human images and 800 non-human images.
Chen, Y, Wu, Q, He, X, Jia, W & Hintz, T 1970, 'Pixel Structure Based on Hausdorff Distance for Human Detection in Outdoor Environments', 9th Biennial Conference of the Australian Pattern Recognition Society on Digital Image Computing Techniques and Applications (DICTA 2007), 9th Biennial Conference of the Australian Pattern Recognition Society on Digital Image Computing Techniques and Applications (DICTA 2007), IEEE, pp. 67-72.
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This paper proposes a novel method for human detection from static images based on pixel structure of input images. In training stage, all sample images consisting of human images and non-human images are used to construct a Hausdorff distance map based on statistically analyzing the difference between the different blocks on each original image. A projection matrix will be created with Linear Discriminant Method (LDM) based on the Hausdorff distance map. This projection matrix will be used to transform multi-dimensional feature vectors (distance maps of testing images) into a feature in a one-dimensional domain. The decision will be made on the simple one-dimensional feature domain according to a precalculated threshold to distinguish human figures from non-human figures. In comparison with the common method based on Mahalanobis distance maps, the proposed method based on Hausdorff distance maps performs much better. Encouraging experimental results have been obtained using 800 human images and 800 non-human images. © 2007 IEEE.
Cheng, B, Ritz, C & Burnett, I 1970, 'Encoding Independent Sources in Spatially Squeezed Surround Audio Coding', ADVANCES IN MULTIMEDIA INFORMATION PROCESSING - PCM 2007, 8th Pacific Rim Conference on Multimedia, Springer Berlin Heidelberg, City Univ Hong Kong, Hong Kong, PEOPLES R CHINA, pp. 804-813.
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Cheng, B, Ritz, C & Burnett, I 1970, 'Principles and Analysis of the Squeezing Approach to Low Bit Rate Spatial Audio Coding', 2007 IEEE International Conference on Acoustics, Speech and Signal Processing - ICASSP '07, 2007 IEEE International Conference on Acoustics, Speech and Signal Processing - ICASSP '07, IEEE.
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This paper presents a novel solution to multichannel spatial audio coding; Spatial Squeezing Surround Audio Coding (S3AC). The S3AC scheme analyses a multichannel audio: signal and downmixes it into a stereo signal pair containing both the monophonic properties of audio sources and their localization information; this avoids the need for side information. The approach uses timefrequency analysis of a spatial audio scene and exploits Virtual sources and amplitude panning techniques to 'squeeze' 360° of a horizontal soundfield to a 60° stereo signal pair. In comparison with other spatial audio coding techniques, S3AC significantly advances in-band encoding of the localization information in the original sound scene and achieves accurate recoverability of dynamic localized sources. © 2007 IEEE.
Cheng, E, Burnett, IS & Ritz, C 1970, 'Time Delay Estimation of Reverberant Meeting Speech: On the Use of Multichannel Linear Prediction', 2007 Third International IEEE Conference on Signal-Image Technologies and Internet-Based System, 2007 Third International IEEE Conference on Signal-Image Technologies and Internet-Based System SITIS, IEEE, Shanghai, PEOPLES R CHINA, pp. 531-537.
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Cheng, TM, Savkin, AV, Celler, BG, Wang, L, Su, SW & IEEE 1970, 'A nonlinear dynamic model for heart rate response to treadmill walking exercise', 2007 ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY, VOLS 1-16, IEEE Engineering in Medicine and Biology Society Annual Conference, IEEE, Lyon, France, pp. 2988-2991.
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A dynamic model of the heart rate response to treadmill walking exercise is presented. The model is a feedback interconnected system; the subsystem in the forward path represents the neural response to exercise, while the subsystem in the feedback path describes the peripheral local response. The parameters of the model were estimated from 5 healthy adult male subjects, each undertaking 3 sets of walking exercise at different speeds. Simulated responses from the model closely match the experimental data both in the exercise and the recovery phases. The model will be useful in explaining the cardiovascular response to exercise and in the design of exercise protocols for individuals.
Conder, P, Gao, J, Abolhasan, M & IEEE 1970, 'Distributed MIMO systems using Asterism decoding', 2007 INTERNATIONAL SYMPOSIUM ON COMMUNICATIONS AND INFORMATION TECHNOLOGIES, VOLS 1-3, International Symposium on Communications and Information Technologies, IEEE, Sydney, Australia, pp. 269-272.
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Multiple Input Multiple Output (MIMO) systems have received enormous attention by researchers as they can provide a roughly linear increase in capacity of wireless communications systems by using multiple transmit and receive antennas. Even with the larger raw data rates provided by MIMO, the throughput of these systems can be limited by the number of users (or networks) sharing the medium. This paper shows how multiple users (or networks) transmitting simultaneously can be represented as a MIMO system with a lager number of transmit than receive antennas. After reviewing existing decoders for such a MIMO system, this paper then proposes applying an Asterism based decoder to distinguish between multiple users transmitting simultaneously. This produces a new multi-user access scheme that can be applied in addition to a primary access method, such as CSMA-CA.
Di Leonardo, R, Ruocco, G, Leach, J, Padgett, MJ, Wright, AJ, Girkin, JM, Burnham, DR & McGloin, D 1970, 'Parametric excitation of optically trapped aerosols', SPIE Proceedings, NanoScience + Engineering, SPIE, San Diego, CA.
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Dou, Y, Guo, Y & Zhu, J 1970, 'Investigation of motor topologies for SMC application', 2007 INTERNATIONAL CONFERENCE ON ELECTRICAL MACHINES AND SYSTEMS, VOLS 1-4, International Conference on Electrical Machines and Systems, IEEE, SOUTH KOREA, Seoul, pp. 1171-+.
Dou, Y, Guo, Y & Zhu, J 1970, 'Investigation of motor topologies for SMC application', Proceeding of International Conference on Electrical Machines and Systems, ICEMS 2007, International Conference on Electrical Machines and Systems, IEEE, Seoul, Korea, pp. 695-698.
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Soft magnetic composite (SMC) materials possess a number of unique properties and have undergone a significant development in the past decade. Based on the experiences on SMC materials and SMC electrical machines from our research group and other researchers, this paper reviews the investigation on motor topologies for SMC application. Both successful experiences and existing difficulties are analyzed and discussed. It is found that the application of SMC is preponderant in small permanent magnet motors with complex topologies and 3D magnetic flux. Possible further work required for commercial success of SMC machines is proposed.
Du, C, Yang, J, Wu, Z, Yuan, Q & Wu, Q 1970, 'Improved neural network based manifold learning method for face recognition with less face images per individual', Proceedings of the 2007 International Conference on Image Processing, Computer Vision, and Pattern Recognition, IPCV 2007, pp. 444-447.
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In this paper, a novel neural network based manifold learning method(NNBML)[1] recently appeared in the Journal of Science is introduced. It can effectively convert high-dimensional data into low-dimensional codes, which are then used for classification. However, it performs not well while dealing with small size face database used for face recognition. We propose a solution generating more samples data based on the existing data. The proposed method is implemented on two well-known face databases, viz. ORL and Yale face databases. The experimental results show that NNBML is able to deal with the task of face recognition after more data samples generated using the proposed method, and also that NNBML outperforms LDA in terms of recognition rate.
Duflos, S, Kervella, B & Gay, VC 1970, 'Considering Security and Quality of Service in SLS to Improve Policy-Based Management of Multimedia Services', Sixth International Conference on Networking (ICN'07), Sixth International Conference on Networking (ICN'07), IEEE, Sainte-Luce, Martinique, pp. 1-6.
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This paper proposes to improve policy-based management by integrating security parameters into the Service Level Specification (SLS). Integrating those parameters in the QoS part of the Service Level Agreement (SLA) specification is of particular importance for multimedia services requiring security since QoS is negotiated when the multimedia service is deployed. Security mechanisms need to be negotiated at that time when sensible multimedia information is exchanged. In this paper we show that including security parameters in SLA specification improves the negotiation and deployment of security and QoS policies for multimedia services. The parameters this paper proposes to integrate have the advantage to be understandable by end-users and service providers.
Eissa, MM, Chaczko, Z & Alrahali, E 1970, 'Interactive Protection System for Operator Training Simulator Using New Wavelet Techniques', The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007), The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007), IEEE, Sydney, Australia, pp. 11-18.
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An increase in complexity of relays and power systems makes the relay settings and the process of coordination quite difficult. The changes of operating conditions in power systems also adversely affect the installed relays. There is a strong requirement to avoid protection relay maloperation and to ensure continuing optimal relay coordination and operation. It is rather difficult to determine which of the protective relays will operate as specified or whether the coordination of the relays is maintained due to complexity of the system. This paper introduces a reliable and secure interactive framework system for investigation, calculation of relay settings and relay coordination using wavelet based techniques. The interactive system allows an engineer in the control room to assign the location, the type of fault and the relay data set pattern; then the operating time of the protective devices is generated. The system framework introduces a dynamic, interactive transient of the relay models for the power system.
Fokkenrood, S, Leijdekkers, P & Gay, V 1970, 'Ventricular Tachycardia/Fibrillation detection algorithm for 24/7 personal wireless heart monitoring', Pervasive Computing for Quality of Life Enhancement, Proceedings, ICOST, Springer, Nara, Japan, pp. 110-120.
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This paper describes a Ventricular Tachycardia/Fibrillation (VT/VF) detection algorithm that is specifically designed for a 24/7 personal wireless heart monitoring system. This monitoring system uses Bluetooth enabled bio-sensors and smart phones to monitor continuously cardiac patients vital signs. Our VT/VF algorithm is optimized for continuous real-time monitoring on smart phones with a high sensitivity and specificity. We studied and compared existing VT/VF algorithms and selected the one which suited best our requirements. However, we modified and improved the existing algorithm for the smart phone to achieve better performance results. We tested the algorithm on full-length signals from the physionet CU, MIT-db and MIT-vfdb databases [16] without any pre-selection of VT/VF or normal QRS-complex signals. We achieved 97% sensitivity, 98% accuracy and 98% specificity for our implementation which is excellent compared to existing algorithms.
Gandia Sanchez, R, Xiaojing Huang & Kwan-Wu Chin 1970, 'Viability of concurrent transmission and reception for UWB radios over multipath channels', 2007 International Symposium on Communications and Information Technologies, 2007 International Symposium on Communications and Information Technologies, IEEE, Sydney, AUSTRALIA, pp. 1241-1246.
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Gao, J & Xu, RY 1970, 'Mixture of the Robust L1 Distributions and Its Applications', Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), Springer Berlin Heidelberg, pp. 26-35.
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Recently a robust probabilistic L1-PCA model was introduced in [1] by replacing the conventional Gaussian noise model with the Laplacian L1 model. Due to the heavy tail characteristics of the L1 distribution, the proposed model is more robust against data outliers. In this paper, we generalized the L1-PCA into a mixture of L1-distributions so that the model can be used for possible multiclustering data. For the model learning we use the property that the L1 density can be expanded as a superposition of infinite number of Gaussian densities to include a tractable Bayesian learning and inference based on the variational EM-type algorithm. © Springer-Verlag Berlin Heidelberg 2007.
Geng, X, Wang, L, Li, M, Wu, Q & Smith-Miles, K 1970, 'Distance-driven Fusion of Gait and Face for Human Identification in Video', Proceedings of Image and Vision Computing New Zealand 2007, Image and Vision Computing Conference, Image and Vision Computing New Zealand, Hamilton, New Zealand, pp. 19-24.
Guo, Y, Chen, J, Zhu, J, Lu, H, Lu, H & Jin, J 1970, 'Development of a PM linear motor for driving HTS maglev vehicle', Proceeding of International Conference on Electrical Machines and Systems, ICEMS 2007, International Conference on Electrical Machines and Systems, IEEE, Seoul, pp. 824-827.
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The phenomenon that a permanent magnet (PM) over a high temperature superconductor (HTS) bulk can produce strong levitation force with self-stabilizing feature has attracted strong interest of application in maglev transportation systems, in which a linear motion drive is an obvious advantage. This paper presents the development of a PM linear synchronous motor drive for a small-scale prototype vehicle which is levitated by PM-HTS bulks. Magnetic field finite element analyses are conducted to compute accurately the key motor parameters such as winding flux, back electromotive force (emf), inductance and cogging force. The steady state characteristic of the motor is predicted by using the classic phasor voltage equation, which can provide a reasonable result if the fundamental components of the applied voltage, back emf and current are dominant. A Matlab/Simulink-based model, capable of considering the dependence of key parameters on the mover position, is built to predict effectively the motor's dynamic performance under a brushless DC (BLDC) control scheme. The simulated results show that the developed linear motor can drive the HTS maglev vehicle prototype at the desired speed.
Guo, Y, Chen, J, Zhu, J, Lu, H, Lu, H & Jin, J 1970, 'Development of a PM linear motor for driving HTS maglev vehicle', 2007 INTERNATIONAL CONFERENCE ON ELECTRICAL MACHINES AND SYSTEMS, VOLS 1-4, International Conference on Electrical Machines and Systems, IEEE, Seoul, SOUTH KOREA, pp. 1300-+.
Guo, Y, Chen, J, Zhu, J, Lu, H, Lu, H & Jin, J 1970, 'Development of a PM Linear Motor for Driving HTS Maglev Vehicle', 2007 International Conference on Electrical Machines and Systems (ICEMS), 2007 International Conference on Electrical Machines and Systems, IEEE.
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Guo, Y, Dou, Y, Zhu, J, Zhan, Y & Jin, J 1970, 'Parameter Determination and Performance Analysis of a PM Synchronous Generator by Magnetic Field Finite Element Analysis', 2007 AUSTRALASIAN UNIVERSITIES POWER ENGINEERING, VOLS 1-2, Australasian Universities Power Engineering Conference (AUPEC), IEEE, Curtin Univ Technol, Perth, AUSTRALIA, pp. 558-+.
Guo, Y, Dou, Y, Zhu, J, Zhan, Y & Jin, J 1970, 'Parameter determination and performance analysis of a PM synchronous generator by magnetic field finite element analysis', 2007 Australasian Universities Power Engineering Conference, 2007 Australasian Universities Power Engineering Conference (AUPEC), IEEE, Perth, Australia, pp. 730-733.
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Guo, Y, Zhu, J, Liu, D, Lu, H & Wang, S 1970, 'Application of Multi-level Multi-domain Modeling in the Design and Analysis of a PM Transverse Flux Motor with SMC Core', 2007 7th International Conference on Power Electronics and Drive Systems, 2007 7th International Conference on Power Electronics and Drive Systems, IEEE, Bangkok, Thailand, pp. 27-31.
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This paper presents the design and analysis of a permanent magnet (PM) transverse flux motor with soft magnetic composite (SMC) core by applying multi-level multi-domain modeling. The design is conducted in two levels. The upper level is composed of a group of equations which describe the electrical and mechanical characteristics of the motor. The lower level consists of two domains: electromagnetic analysis and thermal calculation. The initial design, including structure, materials and major dimensions, is determined according to existing experience and empirical formulae. Then, optimization is carried out at the system level (the upper level) for the best motor performance by optimizing the structural dimensions. To successfully deal with such a multi-level multi-domain optimization problem, an effective modeling with both high computational accuracy and speed is required. For accurately computing the key motor parameters, such as back electromotive force, winding inductance and core loss, magnetic field finite element analysis is performed. The core loss in each element is stored for effective thermal calculation, and the winding inductance and back EMF are stored as a look-up table for effective analysis of the motor's dynamic performance. The presented approach is effective with good accuracy and reasonable computational speed. © 2007 IEEE.
Guo, Y, Zhu, J, Liu, D, Lu, H & Wang, S 1970, 'Application of multi-level multi-domain modeling in the design and analysis of a PM transverse flux motor with SMC core', 2007 INTERNATIONAL CONFERENCE ON POWER ELECTRONICS AND DRIVE SYSTEMS, VOLS 1-4, 7th International Conference on Power Electronics and Drive Systems (PEDS 2007), IEEE, Bangkok, THAILAND, pp. 275-+.
Guo, Y, Zhu, J, Lu, H, Wang, S & Jin, J 1970, 'Performance analysis of an SMC transverse flux motor with modified double-sided stator and PM flux concentrating rotor', Proceeding of International Conference on Electrical Machines and Systems, ICEMS 2007, International Conference on Electrical Machines and Systems, IEEE, Seoul, Korea, pp. 1553-1556.
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This paper presents the design and performance analysis of a three-phase three-stack transverse flux motor with a modified double-sided stator and a permanent magnet (PM) flux concentrating rotor. Both stator and rotor cores employ SOMALOY™500, a new soft magnetic composite (SMC) material specially developed for electrical machine application. By taking advantage of the unique properties of SMC, such as the magnetic isotropy, the motor is designed with three-dimensional (3D) magnetic flux path. To accurately compute the motor parameters and performance, improved formulations are applied in combination with 3D magnetic field finite element analysis. The designed motor shows superior characteristics to laminated machines.
Guo, Y, Zhu, J, Lu, H, Wang, S & Jin, J 1970, 'Performance analysis of an SMC transverse flux motor with modified double-sided stator and PM flux concentrating rotor', 2007 International Conference on Electrical Machines and Systems (ICEMS), 2007 International Conference on Electrical Machines and Systems, IEEE.
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Haiwei Lu, Jianguo Zhu, Youguang Guo & Zhiwei Lin 1970, 'A miniature short stroke tubular linear actuator and its control', 2007 International Conference on Electrical Machines and Systems (ICEMS), 2007 International Conference on Electrical Machines and Systems, IEEE.
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Haiwei, L, Jianguo, Z, Youguang, G & Zhiwei, L 1970, 'A miniature short stroke tubular linear actuator and its control', Proceeding of International Conference on Electrical Machines and Systems, ICEMS 2007, International Conference on Electrical Machines and Systems, IEEE, Seoul, Korea, pp. 1680-1685.
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Miniature actuators are the critical components in the robotic applications with high intelligence, high mobility and small scales. Among various types of actuators, linear actuators show advantages in many aspects. A miniature short stroke PM tubular linear actuator for the micro robotic applications is presented in this paper. The actuator is deliberately designed based on the optimal force capability and a proper sensorless control scheme is developed for the driving of the actuator. Experiment both on the prototype of the actuator and the drive system show the validity of the design.
Hamilton, TJ, Jin, C & van Schaik, A 1970, 'A Basilar Membrane Resonator for an Active 2-D Cochlea', 2007 IEEE International Symposium on Circuits and Systems (ISCAS), 2007 IEEE International Symposium on Circuits and Systems (ISCAS), IEEE, pp. 2387-2390.
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In this paper we present a Basilar Membrane Resonator design for an Active 2-D Cochlea. It incorporates some of the non-linear behaviour exhibited in the real cochlea by utilizing a quality factor control loop. This control loop varies the gain and the frequency selectivity of the resonator based on the amplitude of the input signal. © 2007 IEEE.
Hamilton, TJ, Jin, C, Tapson, J & van Schaik, A 1970, 'A 2-D Cochlea with Hopf Oscillators', 2007 IEEE Biomedical Circuits and Systems Conference, 2007 IEEE Biomedical Circuits and Systems Conference, IEEE, pp. 91-94.
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In this paper we present the circuits for a 2-D silicon cochlea whose basilar membrane resonant elements are constructed using oscillators whose dynamic behaviour is governed by the Hopf differential equation. By using Hopf oscillators we are able to model some of the behaviour of the outer hair cells (OHCs) whose action is responsible for the cochlea's nonlinear behaviour. © 2007 IEEE.
He, S, Zhang, H, Jia, W, Wu, Q & Hintz, TB 1970, 'Combining Global and Local Features for Detection of License Plates in Video', Proceedings of Image and Vision Computing New Zealand 2007, Image and Vision Computing Conference, Image and Vision Computing New Zealand, Hamilton, New Zealand, pp. 288-293.
He, X, Hintz, T, Li, J, Zhang, H, Wu, Q & Jia, W 1970, 'Local binary pattern on hexagonal structure for face matching', Proceedings of the 2007 International Conference on Image Processing, Computer Vision, and Pattern Recognition, IPCV 2007, International Conference on Image Processing, Computer Vision and Pattern Recognition, CSREA Press, Las Vegas, USA, pp. 455-460.
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Principal Components Analysis (PCA), Independent Component Analysis (ICA) and Linear Discriminant Analysis (LDA), have been widely used for 2D face recognition. Local Binary Pattern (LBP), however, provides a simpler and more effective way to represent faces. With LBP, face image is divided into small regions from which LBP histograms are extracted and concatenated into a single and global feature histogram representing the face image. The recognition is performed using Chi square and other commonly used dissimilarity measures. In this paper, we construct LBP codes together with three dissimilarity measures on hexagonal structure. We show that LBPs defined on hexagonal structure will lead to a faster and more accurate scheme for face recognition.
He, X, Jia, W, Li, J, Wu, Q & Hintz, T 1970, 'An Approach to Edge Detection on a Virtual Hexagonal Structure', 9th Biennial Conference of the Australian Pattern Recognition Society on Digital Image Computing Techniques and Applications (DICTA 2007), 9th Biennial Conference of the Australian Pattern Recognition Society on Digital Image Computing Techniques and Applications (DICTA 2007), IEEE, Glenelg, Australia, pp. 340-345.
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Hexagonal structure is another image structure alternative to traditional square image structure for image processing and computer vision. The geometrical arrangement of pixels on a hexagonal structure can be described as a collection of hexagonal pixels. Because all the existing hardware for capturing image and for displaying image are produced based on square structure, it becomes important to find a proper software approach to mimic hexagonal structure so that images represented on the traditional square structure can be smoothly converted from or to the images on hexagonal structure. For accurate image processing, it is critical to best maintain the image resolution during the image conversion. In this paper, a bilinear interpolation algorithm that is used to convert an image from square structure to hexagonal structure is presented. Based on this, an edge detection method is proposed. Our experimental results show that the bilinear interpolation improves the edge detection accuracy. © 2007 IEEE.
He, X, Jia, W, Wu, Q & Hintz, T 1970, 'Advances in Grid and Pervasive Computing', Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), International Conference on Grid and Pervasive Computing, Springer Berlin Heidelberg, Paris, France, pp. 751-756.
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This paper presents an edge detection method based on bilateral filtering taking into account both spatial closeness and intensity similarity of pixels in order to preserve important visual cues provided by edges and reduce the sharpness of transitions in intensity values as well. In addition, the edge detection method proposed in this paper is achieved on sampled images represented on a newly developed virtual hexagonal structure. Due to the compact and circular nature of the hexagonal lattice, a better quality edge map is obtained. We also present a parallel implementation for edge detection on the virtual hexagonal structure that significantly increases the computation speed. © Springer-Verlag Berlin Heidelberg 2007.
He, X, Li, J, Chen, Y, Wu, Q & Jia, W 1970, 'Local Binary Patterns for Human Detection on Hexagonal Structure', Ninth IEEE International Symposium on Multimedia (ISM 2007), Ninth IEEE International Symposium on Multimedia (ISM 2007), IEEE, Taichung, Taiwan, pp. 65-71.
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Local Binary Pattern (LBP) was designed and has been widely used for efficient texture classification. LBP provides a simple and effective way to represent texture patterns. Uniform LBPs play an important role for LBP-based pattern/object recognition as they include majority of LBPs. On the other hand, Human detection based on Mahalanobis Distance Map (MDM) recognizes appearance of human based on geometrical structure. Each MDM shows a clear texture pattern that can be classified using LBPs. In this paper, we compute LBPs of MDMs on a hexagonal structure. The circular pixel arrangement in hexagonal structure results in higher accuracy for LBP representation than on square structure. Chi-square as a measure is used for human detection based on uniform LBPs obtained. We show that our method using LBPs built on MDMs has a higher human detection rate and a lower false positive rate compared to the method merely based on MDMs. We will also show using experimental results that LBPs on hexagonal structure lead to more robust human classification.
He, X, Li, J, Chen, Y, Wu, Q & Jia, W 1970, 'Local binary patterns for human detection on hexagonal structure', Proceedings - 9th IEEE International Symposium on Multimedia, ISM 2007, pp. 65-71.
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Local Binary Pattern (LBP) was designed and has been widely used for efficient texture classification. LBP provides a simple and effective way to represent texture patterns. Uniform LBPs play an important role for LBP-based pattern/object recognition as they include majority of LBPs. On the other hand, Human detection based on Mahalanobis Distance Map (MDM) recognizes appearance of human based on geometrical structure. Each MDM shows a clear texture pattern that can be classified using LBPs. In this paper, we compute LBPs of MDMs on a hexagonal structure. The circular pixel arrangement in hexagonal structure results in higher accuracy for LBP representation than on square structure. Chi-square as a measure is used for human detection based on uniform LBPs obtained. We show that our method using LBPs built on MDMs has a higher human detection rate and a lower false positive rate compared to the method merely based on MDMs. We will also show using experimental results that LBPs on hexagonal structure lead to more robust human classification. © 2007 IEEE.
He, X, Li, J, Jia, W, Wu, Q & Hintz, T 1970, 'Local Binary Patterns on Hexagonal Image Structure', 7th IEEE International Conference on Computer and Information Technology (CIT 2007), 7th IEEE International Conference on Computer and Information Technology (CIT 2007), IEEE, Aizu-Wakamatsu City, Fukushima, Japan, pp. 639-644.
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Local binary pattern (LBP) was designed and widely used for efficient texture classification. It has been used for face recognition and has potential applications in many other research areas such as human detection. LBP provides a simple and effective way to represent patterns. Uniform LBPs play an important role for LBP-based pattern /object recognition as they include majority of LBPs. In this paper, we present LBP codes on hexagonal image structure. We show that LBPs defined on hexagonal structure have higher percentages of uniform LBPs that will lead to a more efficient and accurate recognition scheme for image classification.
He, X, Wu, Q, Zhang, H & Hintz, T 1970, 'A trend for face recognition', Fourth International Conference on Information Technology and Applications, ICITA 2007, International Conference on Information Technology and Applications, Macquarie Scientific Publishing, Harbin, China, pp. 254-257.
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Face recognition has many applications in law enforcement, crowd surveillance, security access control and human computer interaction. However, the applications have been, greatly constrained by the limitations of the currently available recognition tools because these tools are either too slow, sensitive to pose, illumination and facial expression, or too expensive, and hence are impractical. Face recognition is difficult and still has a long way to go before it really becomes practical. The aim of this paper is to present how a system for real-time, robust and inexpensive face recognition may be approached. The system contains the following components: Low cost CCTV video cameras or simple digital, cameras to quickly locate faces on 2D face images captured. A constructor of 3D face images using the captured 2D images. Algorithms that accurately match the constructed 3D face images to the 2D face images preciously existing in a gallery in real-time for pose and illumination invariant face recognition.
Hidayat, R, Dejhan, K, Moungnoul, P & Miyanaga, Y 1970, 'A GHz analog multiplier for UWB communications', 2007 Asia-Pacific Conference on Communications, 2007 Asia Pacific Conference on Communications, IEEE.
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Hoang, D 1970, 'Wireless Technologies and Architectures for Health Monitoring Systems', First International Conference on the Digital Society (ICDS'07), First International Conference on the Digital Society (ICDS'07), IEEE, Guadeloupe, pp. 1-6.
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Various wireless technologies have been used in health monitoring systems; however, it is not always clear why one technology is chosen over another and how it fits into the overall architecture of an application. This paper explores many limiting characteristics of relevant wireless technologies and attempts to provide a basis for making an appropriate selection. The paper also suggests an architecture that supports collaboration among multiple caregivers over a particular health monitoring application.
Hoang, DB, Phan, HT & IEEE 1970, 'A scalable end-to-end QoS architecture', 2007 INTERNATIONAL SYMPOSIUM ON COMMUNICATIONS AND INFORMATION TECHNOLOGIES, VOLS 1-3, International Symposium on Communications and Information Technologies, IEEE, Sydney, Australia, pp. 677-682.
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For IP networks to become a service oriented architecture, it is crucial to provision a network architecture that is capable of differentiating and supporting quality of services (QoS) to applications. In this paper we propose a new end-to-end QoS framework, called End-Diff, that has a number of desirable properties. The new architecture has the scalability property of DiffServ, pioneers a novel path congestion control, allocates bandwidth fairly among flows and aggregates, and is capable of negotiating QoS paths among domains through BGP QoS extension. The new architecture makes use of a simple control plane of a router and does not require any sophisticated PHB scheduling in its forwarding plane. Via simulation, we demonstrate that End-Diff QoS architecture performs excellently in terms of scalability, overhead, route selection policy, fairness, packet delay and jitter. © 2007 IEEE.
Hoang, HG, Tuan, HD & Nguyen, TQ 1970, 'Design of Two-Channel Filter Bank Composed of Linear Phase IIR Filters', 2007 15th International Conference on Digital Signal Processing, 2007 15th International Conference on Digital Signal Processing, IEEE, Cardiff, Wales, pp. 308-311.
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This paper proposes a novel method to design two-channel filter banks composed of exactly linear phase IIR filters. Broadly speaking, the design problem is formulated as a semidefinite program (SDP) of minimal order such that the computational complexity
Hoang, HG, Tuan, HD & Nguyen, TQ 1970, 'Frequency Selective KYP Lemma and its Applications to IIR Filter Bank Design', 2007 IEEE International Conference on Acoustics, Speech and Signal Processing - ICASSP '07, 2007 IEEE International Conference on Acoustics, Speech, and Signal Processing, IEEE, Honolulu, HI, pp. 1457-1460.
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For a transfer function/filter F(e(Jw)) of order n, Kalman-Yakubovich-Popov (KYP) lemma characterizes the intractable semi-infinite programming (SIP) condition F(e(-Jw)) 1 Theta [F(e(-Jw)) 1]>= 0 for all omega in frequency domain by a tractable semi-defi
Hossain, MJ, Hossain, MS, Hoque, MA & Anower, MS 1970, 'A novel Fuzzy logic based flux weakening speed control for IPMSM drive with variable direct and quadrature axis inductances', 2007 10th International Conference on Computer and Information Technology, 2007 10th International Conference on Computer and Information Technology (ICCIT 2007), IEEE, United Int Univ, Dhanmondi, BANGLADESH, pp. 27-+.
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Huang, Y, Hu, Q, Zhao, J, Zhu, J & Guo, Y 1970, 'Comparative Study of High-Speed PM Motors with Laminated Steel and Soft Magnetic Composite Cores', 2007 IEEE Industry Applications Annual Meeting, 2007 IEEE Industry Applications Annual Meeting, IEEE, New Orleans, USA, pp. 67-72.
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Soft magnetic composite (SMC) material is formed by surface-insulated iron powder particles, and has very low eddy current. To explore the application of SMC materials, two types of high-speed (20krpm) permanent magnet (PM) motor have been designed and constructed. One employs radial flux type with laminated steel core, and the other employs transverse flux type with SMC core. Considering the importance of core loss in high speed motors, laminated steel and SMC material are tested by 2-D magnetic tester, and rotational core loss model is employed in the core loss calculation. Details of machine geometry and design procedure are described and some features of the machines are compared.
Huang, Y, Zhu, J, Guo, Y & Hu, Q 1970, 'Core Loss and Thermal Behavior of High-Speed SMC Motor Based on 3-D FEA', 2007 IEEE International Electric Machines & Drives Conference, 2007 IEEE International Electric Machines & Drives Conference, IEEE, Antalya, Turkey, pp. 1569-1573.
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In a high-speed motor, core loss is much greater than other losses and is the main source of heat due to the high operating frequency. Therefore it is of crucial importance to be able to calculate the core loss accurately. The rotational core loss model is employed in this paper. Practical methods considering the alternating magnetic filed only are also presented, which are useful to designers who do not have rotational core loss data. The three-dimensional (3-D) finite element analysis (FEA) is used to calculate the accurate temperature distribution. Core losses are coupled directly into thermal calculation by keeping the same hexahedral mesh structure between magnetic field analysis and thermal analysis. These methods are applied to a 2 kW, 20 krpm high-speed claw pole motor with soft magnetic composite (SMC) core, and the results are compared and discussed finally.
Huang, Y, Zhu, J, Guo, Y & Hu, Q 1970, 'Development of a High-Speed Claw Pole Motor with Soft Magnetic Composite Core', 2007 IEEE International Electric Machines & Drives Conference, 2007 IEEE International Electric Machines & Drives Conference, IEEE, Antalya, Turkey, pp. 1564-1568.
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Soft Magnetic Composite (SMC) material is formed by surface-insulated iron powder particles, generating unique properties like magnetic and thermal isotropy, and very low eddy current. This paper presents the design and analysis of a high-speed claw pole motor with an SMC core for reducing core losses and cost. The analyses are conducted based on a comprehensive understanding of the property of SMC materials. Three dimensional (3-D) finite element analysis (FEA) is performed for accurate parameter calculation and dimension optimization. Considering the importance of core loss in high speed motors, rotational core loss model is employed. The design and analyze methods are validated by experiment on the prototype.
Hung, TQ, Tuan, HD & Nguyen, TQ 1970, 'Design of Diamond and Circular Filters by Semi-definite Programming', 2007 IEEE International Symposium on Circuits and Systems (ISCAS), 2007 IEEE International Symposium on Circuits and Systems (ISCAS), IEEE, New Orleans, USA, pp. 2966-2969.
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A new design for linear phase diamond-shaped (DS) and circular-shaped (CS) 2-D filters is developed. First, the frequency masks are efficiently constrained by 2-D second-order trigonometric polynomials. Then semi-definite program ming (SDP) of reasonably
Hung, TQ, Tuan, HD & Nguyen, TQ 1970, 'Design of Half-Band Diamond and Fan Filters by SDP', 2007 IEEE International Conference on Acoustics, Speech and Signal Processing - ICASSP '07, 2007 IEEE International Conference on Acoustics, Speech and Signal Processing - ICASSP '07, IEEE, Honolulu, HI, pp. 901-904.
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A new design method for linear phase half-band diamond (DS) and fan-shaped (FS) 2-D filters is proposed. A general formulation for frequency mask constraints in different shapes using 2-D trigonometric curves is developed. This facilitates semi-definite
Hung, TQ, Tuan, HD & Nguyen, TQ 1970, 'Optimization based design for 2-D nonseparable filters', Proceedings of the ISSAT International Conference on Modeling of Complex Systems and Environments, ISSAT International Conference on Modeling of Complex Systems and Environments, Int Soc Sci Appl Technol, Ho Chi Minh City, Vietnam, pp. 46-47.
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Iacopi, F, Vereecken, PM, Schaekers, M, Caymax, M, Moelans, N, Blanpain, B, Detavernier, C, D'Haen, J & Griffiths, H 1970, 'Alternative Catalysts For Si-Technology Compatible Growth Of Si Nanowires', MRS Proceedings, Springer Science and Business Media LLC, pp. 8-13.
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AbstractThe use of Au nanoparticles as catalysts for growth of Si nanowires poses fundamental reliability concerns for applications in Si semiconductor technology. In this work we show that the choice of catalysts can be broadened when the need for catalytic precursor dissociation is eliminated. However, the requirements for selective deposition in a gas phase transport -limited regime become stringent. When competing deposition of amorphous Si can bury the particles faster than the incubation time for VLS growth, no nanowire growth will be initiated. We show that the use of a catalyst such as In, already in a liquid form at the growth temperature, is effective. Therefore, the choice of VLS catalysts among the low melting point metals from the III, IV and V groups is suggested.
Iu, HHC, Ling, SH, Lu, DDC & IEEE 1970, 'Comparative study of bifurcation boundry in parallel-connected buck converters under democratic current-sharing control', 2007 AUSTRALASIAN UNIVERSITIES POWER ENGINEERING, VOLS 1-2, Australasian Universities Power Engineering Conference (AUPEC), IEEE, Curtin Univ Technol, Perth, AUSTRALIA, pp. 359-363.
Jay Guo, Y 1970, 'Cover', 2007 International Symposium on Communications and Information Technologies, 2007 International Symposium on Communications and Information Technologies, IEEE.
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Jia, W & Tien, D 1970, 'Discovering local cooccurring patterns from aerial images', Fourth International Conference on Information Technology and Applications, ICITA 2007, International Conference on Information Technology and Applications, Macquarie Scientific Publishing, Sydney, Australia, Harbin, China, pp. 300-305.
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Developing a spatial searching engine to enhance the search capabilities of large spatial repositories for GIS update has attracted more and more attention. Existing methods are usually designed to extract limited types of objects and use only one aspect of features of Images. In this paper, we propose to use the local cooccurring patterns to disclose the cooccurring relationships among each dominant local features and use this local cooccurring patterns to recognize an object from aerial images. For this purpose, we investigate three types of local features: colour-based features, texture-based features, and edgebased shape features. In order to facilitate the feature extraction procedure, we first use discontinuity-preserving smoothing methods to filter the input image. Two popular smoothing techniques are tested and compared. Experimental results are presented in this paper.
Jia, W, He, S, Zhang, H & Wu, Q 1970, 'Combining Edge and Colour Information for Number Plate Detection', Proceedings of Image and Vision Computing New Zealand 2007, Image and Vision Computing Conference, Image and Vision Computing New Zealand, Hamilton, New Zealand, pp. 227-232.
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This paper presents a method for vehicle number plate detection which combines edge and colour features of number plates. We concentrate on two key issues of this application: speed and robustness. Our focus is put on detecting parts of a number plate, instead of the number plate itself as a whole. To achieve the target of real-time detection, two simple features based on a rede¯ned vertical edge map are constructed. To address the illumination-sensitive problem of using colour information, a Gaussian weighted histogram intersection (GWHI) method is proposed. The above new ideas compose the major part of the algorithm. Our experimental results demonstrate a promising preliminary result on detecting yellow number plates in terms of detection speed and robustness, which shows the feasibility of the proposed method.
Jia, W, Tien, D, He, X, Hope, BA & Wu, Q 1970, 'Advances in Visual Information Systems', Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), International Conference on Visual Information Systems, Springer Berlin Heidelberg, Shanghai, China, pp. 478-489.
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Developing a spatial searching tool to enhance the search car pabilities of large spatial repositories for Geographical Information System (GIS) update has attracted more and more attention. Typically, objects to be detected are represented by many local features or local parts. Testing images are processed by extracting local features which are then matched with the object's model image. Most existing work that uses local features assumes that each of the local features is independent to each other. However, in many cases, this is not true. In this paper, a method of applying the local cooccurring patterns to disclose the cooccurring relationships between local features for object detection is presented. Features including colour features and edge-based shape features of the interested object are collected. To reveal the cooccurring patterns among multiple local features, a colour cooccurrence histogram is constructed and used to search objects of interest from target images. The method is demonstrated in detecting swimming pools from aerial images. Our experimental results show the feasibility of using this method for effectively reducing the labour work in finding man-made objects of interest from aerial images. © Springer-Verlag Berlin Heidelberg 2007.
Jiangfeng Zhang & Xiaohua Xia 1970, 'Best switching time of hot water cylinder-switched optimal control approach', AFRICON 2007, AFRICON 2007, IEEE, Windhoek, NAMIBIA, pp. 436-441.
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Jiaxin Chen, Jianguo Zhu & Youguang Guo 1970, 'A 2-D nonlinear FEA tool embedded in Matlab/Simulink surrounding for application of electromagnetic field analysis in power converters', 2007 International Conference on Electrical Machines and Systems (ICEMS), 2007 International Conference on Electrical Machines and Systems, IEEE.
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Jiaxin Chen, Jianguo Zhu & Youguang Guo 1970, 'A unified hybrid model with two level networks for peak current mode controlled buck-boost converters operating in DCM and CCM', 2007 International Conference on Electrical Machines and Systems (ICEMS), 2007 International Conference on Electrical Machines and Systems, IEEE.
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Jiaxin Chen, Jianguo Zhu & Youguang Guo 1970, 'Modeling and performance analysis of energy regeneration system in electric vehicle with permanent magnet DC motor driving system', 2007 International Conference on Electrical Machines and Systems (ICEMS), 2007 International Conference on Electrical Machines and Systems, IEEE.
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Jiaxin Chen, Youguang Guo & Jianguo Zhu 1970, 'A general method for designing the transformer of flyback converters based on nonlinear FEA of electromagnetic field coupled with external circuit', 2007 International Conference on Electrical Machines and Systems (ICEMS), 2007 International Conference on Electrical Machines and Systems, IEEE.
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Jie Zhao, Xiaojing Huang & Dutkiewicz, E 1970, 'Dynamic bandwidth MCIDS - a cognitive solution for MCIDS based UWB communications', 2007 International Symposium on Communications and Information Technologies, 2007 International Symposium on Communications and Information Technologies, IEEE, Sydney, Australia, pp. 1502-1506.
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Dynamic bandwidth multicode interleaved direct sequence (MCIDS), an enhanced MCIDS based Ultra-wideband (UWB) application is proposed in this paper, featuring a cognitive transmission bandwidth adaptation without any adverse effect on the data rate. By introducing a specific lowpass filtering and down-sampling into the traditional MCIDS algorithm, this system can decrease the transmission bandwidth into part of its original bandwidth but still be able to recover all the transmitted data from the reduced bandwidth. This solution can efficiently improve the coexistence ability of UWB devices in a cognitive manner without increasing hardware complexity. © 2007 IEEE.
Jin, J, Guo, Y, Chen, J, Zheng, L & Zhu, J 1970, 'HTS levitation and transportation with linear motor control', PROCEEDINGS OF THE 26TH CHINESE CONTROL CONFERENCE, VOL 6, 26th Chinese Control Conference, BEIJING UNIV AERONAUTICS & ASTRONAUTICS PRESS, Zhangjiajie, PEOPLES R CHINA, pp. 10-+.
Jin, J, Zheng, L, Wen, J, Guo, Y, Chen, J & Zhu, J 1970, 'HTS Levitated Mobile Technology and Prototype', 2007 IEEE International Conference on Integration Technology, 2007 IEEE International Conference on Integration Technology, IEEE, Shenzhen, China, pp. 47-51.
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The special reaction phenomenon of a high temperature superconductor (HTS) to magnetic fields provides an alternative technical solution for design of a levitated mobilization system, in which a linear motion drive with a HTS incorporated is a critical issue. This work presents the design and performance analysis of a HTS linear synchronous driving system with a prototype built for verification. Magnetic field finite element analyses are conducted to compute the key parameters, and the steady state characteristic of the system is predicted by using the classic phasor voltage equation. A simulation model is also built to analyze the system dynamic performance, and results show that the levitated HTS mobilization system developed can be driven and controlled at the desired speed.
Jin, JX, Zhang, JL, Guo, YG, Zhan, YD & Zhu, JG 1970, 'Next generation of DC power transmission technology using High T<inf>c</inf> superconducting cables', 2007 Australasian Universities Power Engineering Conference, 2007 Australasian Universities Power Engineering Conference (AUPEC), IEEE, Perth, Australia, pp. 205-210.
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Jin, JX, Zhang, JL, Guo, YG, Zhan, YD & Zhu, JG 1970, 'Next generation of DC power transmission technology using high T-c superconducting cables', 2007 AUSTRALASIAN UNIVERSITIES POWER ENGINEERING, VOLS 1-2, Australasian Universities Power Engineering Conference (AUPEC), IEEE, Curtin Univ Technol, Perth, AUSTRALIA, pp. 135-+.
Kazuto Nishi, Shingo Yoshizawa & Yoshikazu Miyanaga 1970, 'A study of dynamic reconfigurable FFT processor for OFDM based cognitive radio', 2007 International Symposium on Communications and Information Technologies, 2007 International Symposium on Communications and Information Technologies, IEEE.
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Kha, HH, Tuan, HD & Nguyen, TQ 1970, 'An Efficient SDP Based Design for Prototype Filters of M-Channel Cosine-Modulated Filter Banks', 2007 IEEE International Conference on Acoustics, Speech and Signal Processing - ICASSP '07, 2007 IEEE International Conference on Acoustics, Speech and Signal Processing - ICASSP '07, IEEE, Honolulu, HI, pp. 893-896.
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The paper presents an efficient semidefinite programming (SDP) based design for prototype filters of cosine-modulated filter banks (CMFBs). We consider a class of near-perfect reconstruction CMFBs with the linear phase prototype filter, which structurall
Kha, HH, Tuan, HD & Nguyen, TQ 1970, 'Design of Cosine-Modulated Pseudo-QMF Banks Using Semidefinite Programming Relaxation', 2007 IEEE International Symposium on Circuits and Systems (ISCAS), 2007 IEEE International Symposium on Circuits and Systems (ISCAS), IEEE, New Orleans, USA, pp. 585-588.
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The paper proposes a new approach for the design of M-channel pseudo-quadrature mirror filter (QMF) banks. First, the convex hull of 2Mth band linear phase filters admitting linear phase spectral factors is analytically described by semidefinite programm
Kha, HH, Tuan, HD & Nguyen, TQ 1970, 'Optimal design of triplet halfband filter banks via Semidefinite Programming', 2007 International Symposium on Communications and Information Technologies, 2007 International Symposium on Communications and Information Technologies, IEEE, Sydney, AUSTRALIA, pp. 243-+.
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This paper proposes a computationally efficient method for designing a class of triplet halfband filter banks. We show that the design of perfect reconstruction two-channel filter banks with arbitrary regularity order can be precisely formulated as a sem
Kong, X 1970, 'GPS Modeling in Frequency Domain', The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007), The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007), IEEE, Sydney Australia, pp. 61-66.
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Although DGPS provides positioning information with high precision, when DGPS is unavailable in some situations, stand-alone GPS has to be used in vehicle navigation. The accuracy of standard GPS is low due to position measurement errors. This paper presents a frequency domain modeling approach to model GPS errors and increase GPS positioning accuracy. This approach models GPS errors using shaping filter. External sensors are employed to reduce GPS errors. This paper also presents an approach to select external sensors to meet the quality requirements of positioning system.
Kwok, N, Carmichael, MG, Ha, QP & Tan, K 1970, 'Statistical decision based gray-level image feature matching', Proceedings of the 8th International Conference on Intelligent Technologies (InTech'07), International Conference on Intelligent Technologies, University of Technology Sydney, Sydney, Australia, pp. 269-274.
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Kwok, NM, Ha, QP & Samali, B 1970, 'MR Damper Optimal Placement for Semi-Active Control of Buildings Using an Efficient Multiobjective Binary Genetic Algorithm', Automation and Robotics in Construction ― Proceedings of the 24th International Symposium on Automation and Robotics in Construction, 24th International Symposium on Automation and Robotics in Construction, International Association for Automation and Robotics in Construction (IAARC), Kochi, pp. 361-367.
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In order to ensure the survival of building structures during earthquake periods, induced vibrations have to be mitigated. In this regard, semi-active control of smart structures using magneto-rheological dampers is becoming an emerging technology. Improvements on vibration reduction are foreshadowed when the dampers are installed at critical locations on the building structure. In this paper, the placement of dampers is cast as a multi-objective optimization problem in the sense of minimum resultant vibration magnitudes and with a minimum number of dampers. A binary-coded genetic algorithm is employed as the optimizer owing to its computational flexibility and high performance. Simulation results are included to illustrate the effectiveness of the proposed approach on a high-rise building model subject to benchmark earthquake records.
Kwok, NM, Ha, QP, Fang, G & IEEE 1970, 'Data association in bearing-only SLAM using a cost function-based approach', PROCEEDINGS OF THE 2007 IEEE INTERNATIONAL CONFERENCE ON ROBOTICS AND AUTOMATION, VOLS 1-10, IEEE International Conference on Robotics and Automation, IEEE, Roma, Italy, pp. 4108-4113.
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When using an extended Kalman filter (EKF) in simultaneous localization and mapping (SLAM) for a mobile robot with bearing-only measurements, it is crucial to correctly assign correspondences between measurements and registered features in the map, otherwise the filter diverges or becomes inconsistent. Conventional methods based on the Mahalanobis distance metric may produce data association ambiguities. Its reliability may further be degraded in bearing-only SLAM due to the limited amount of information delivered from the sensor. The data association process is cast here as that of making a decision based on the sensor measurement as whether to update the EKF or not. For this, cost functions are applied taking into account the interferences from other features. The proposed approach enhances robustness of the data association and consequently assures the performance of bearing-only SLAM. Results from simulations and experiments are included to demonstrate the effectiveness of the method in a typical indoor scenario.
Lam, HK, Ling, SH, Iu, HHC, Yeung, CW, Leung, FHF & IEEE 1970, 'Control of nonlinear systems with a linear state-feedback controller and a modified neural network tuned by genetic algorithm', 2007 IEEE CONGRESS ON EVOLUTIONARY COMPUTATION, VOLS 1-10, PROCEEDINGS, IEEE Congress on Evolutionary Computation, IEEE, Singapore, SINGAPORE, pp. 1614-1619.
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Lebbe, MA, Agbinya, JI, Chaczko, Z & Chiang, F 1970, 'Self-organized classification of dangers for secure Wireless Mesh Networks', 2007 Australasian Telecommunication Networks and Applications Conference, 2007 Australasian Telecommunication Networks and Applications Conference (ATNAC 2007), IEEE, Christchurch, New Zealand, pp. 1-6.
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This paper introduces danger theory in artificial immune system as a method of responding to danger in wireless mesh networks. It identifies the challenges in deploying Wireless Mesh networks (WMNs) and focus on secure routing as one of the key challenges in deploying WMNs. In order to implement a secure routing system, various Artificial Immune System (AIS) models were analysed. These models have been used in Intrusion Detection System (IDS) and computer security in the literature. In this paper, the authors propose to use Danger models to secure routing in WMNs. The first step in secure routing process is to identify and classify the network dangers and take necessary actions to overcome those dangers. For the classification task, we apply Self-organizing Maps (SOMs) as the classifier to classify the danger levels in WMNs. These identified danger conditions are further deployed as the warning signals for the design of secure routing protocol. The experimental results validate the proposal of applying the Danger Theory (DT) into security area and good performance is also reported by the use of Artificial Neural Network (ANN) classifier.
Lee, J, Zhu, Y & Seshia, A 1970, 'Sub-10e Charge Resolution for Room Temperature Electrometry', 2007 IEEE Sensors, 2007 IEEE Sensors, IEEE.
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Leijdekkers, P, Gay, V & Lawrence, E 1970, 'Smart Homecare System for Health Tele-monitoring.', ICDS, International Conference on Digital Society, IEEE Computer Society, Guadaloupe, French Carribean, pp. 3-3.
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An increasing aged population worldwide puts our medical capabilities to the test. Research and commercial groups are investigating novel ways to care for the aged and chronically ill both in their own homes and in care facilities. This paper describes a prototype we have developed for remote healthcare monitoring. This personalized smart homecare system uses smart phones, wireless sensors, web servers and IP webcams. To illustrate the functionality of the prototype we describe a series of typical tele-health monitoring scenarios
Li Li & Petersen, IR 1970, 'A Gramian-based approach to model reduction for uncertain systems', 2007 46th IEEE Conference on Decision and Control, 2007 46th IEEE Conference on Decision and Control, IEEE, New Orleans, USA, pp. 4373-4378.
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The paper considers the problem of model reduction for a class of uncertain systems with structured norm bounded uncertainty. The paper introduces controllability and observability Gramians in terms of certain parameterized algebraic Riccati inequalities. This enables a balanced trun-cation model reduction procedure for uncertain systems to be presented. Error bounds for this model reduction procedure are derived. The paper also investigates H ∞ model reduction for uncertain systems. The solution to this problem is shown to involve constructing the underlying Gramians satisfying a certain rank constraint. ©2007 IEEE.
Li Li & Petersen, IR 1970, 'A rank constrained LMI algorithm for the robust H<sup>∞</sup> control of an uncertain system via a stable output feedback controller', 2007 46th IEEE Conference on Decision and Control, 2007 46th IEEE Conference on Decision and Control, IEEE, New Orleans, Louisiana, pp. 5423-5428.
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The paper presents a numerical algorithm for constructing a stable output feedback controller for the robust H∞ control of an uncertain system. The uncertain systems under consideration contain structured uncertainty described by integral quadratic constraints. The controller is designed to achieve absolute stabilization with a specified level of disturbance attenuation. The main result gives an algorithm for constructing the desired controller in terms of LMIs subject to rank constraints. ©2007 IEEE.
Li Li & Ugrinovskii, VA 1970, 'Robust stabilization of LPV systems with structured uncertainty using minimax controllers', 2007 46th IEEE Conference on Decision and Control, 2007 46th IEEE Conference on Decision and Control, IEEE, New Orleans, LA, pp. 2767-2772.
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This paper addresses a robust control scheduling scheme for uncertain linear parameter-varying systems with structured uncertainty. A gain-scheduled controller is proposed which employs a set of minimax optimal robust controllers and incorporates an interpolation rule to achieve continuity of the controller gain over a range of operating conditions. Novel weighted time-domain integral quadratic constraints are introduced to assist in the derivation of the controller. The key idea of the interpolation for the structured uncertainty case is to transform the parameterized algebraic Riccati inequalities into equivalent linear matrix inequalities. For every fixed value of the system parameter, the proposed controller guarantees robust stability and a certain bound on the worst-case performance of the corresponding uncertain closed loop system. Furthermore, a bound on the rate of parameter variations is obtained under which the closed loop LPV system is robustly stable. To obtain the proposed controller, a set of semi-definite programming problems are introduced; this enables an efficient numerical solution to the problem under consideration. © 2007 IEEE.
Li, L, Petersen, IR & IEEE 1970, 'A rank constrained LMI algorithm for decentralized state feedback guaranteed cost control of uncertain systems with uncertainty described by integral quadratic constraints', 2007 AMERICAN CONTROL CONFERENCE, VOLS 1-13, American Control Conference, IEEE, New York, USA, pp. 257-262.
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The paper presents a numerical algorithm for constructing a decentralized state feedback guaranteed cost controller for an uncertain system. The uncertain systems under consideration contain structured uncertainty described by integral quadratic constraints. The decentralized controller is designed to achieve a closed loop system which is absolutely stable and such that a cost function satisfies a given bound for all admissible uncertainties. The main result gives an algorithm for constructing the desired controller in terms of LMIs subject to rank constraints. © 2007 IEEE.
Li, Y, Archer, JW, Rosolen, G, Hay, SG, Timms, GP & Guo, YJ 1970, 'Fringe Management for a T-Shaped Millimeter-Wave Imaging System', IEEE Transactions on Microwave Theory and Techniques, Institute of Electrical and Electronics Engineers (IEEE), pp. 1246-1254.
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Two methods, the modulated scene method and modulated beam method, are proposed in this paper to manage the fringe in a T-shaped correlating millimeter-wave imaging system. The modulated scene method incorporates the fringe into the scene to form a fringe-modulated scene. The pencil beam that corresponds to the beam of the system with a zero baseline scans the modulated scene to form an image. To recover the image of the original scene, an algorithm that involves demodulation and spectrum patching is used to process the original image after deconvolution. The resulting image is a super-resolution image of the scene. The advantage of the modulated scene method is that a phase shifter is not required. The modulated beam method incorporates the fringe into the beam. By dynamically adjusting the phase of a local oscillator, the fringe scans together with the beam. The advantages of this method are that demodulation is unnecessary and only a single output (real or imaginary) from the complex correlator is necessary to generate a super-resolution image. A disadvantage is that a rapidly adjustable phase shifter is needed. The performance of these methods is theoretically analyzed and tested with simulated data. © 2007 IEEE.
Li, Y, Timms, G, Archer, J, Rosolen, G, Tello, J, Brothers, M, Hellicar, A & Guo, YJ 1970, 'Passive mm-wave imaging using two scanning fan-beam antennas', SPIE Proceedings, Defense and Security Symposium, SPIE.
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A prototype cross-correlating 190 GHz passive mm-wave imaging system has been developed. This system is based on the Mills Cross system used for radio astronomical imaging. It uses two pillbox antennas arranged in a T configuration. Each antenna generates a fan beam and the two fan beams are orthogonal to each other. By cross-correlating signals received from the two antennas, an output is obtained which is proportional to the millimeter-wave intensity radiated from the target at the intersection of the two fan beams. Beam scanning is generated by rotating a small sub-reflector inside each antenna. As a result, these relatively heavy antennas are stable during scanning and a high frame rate can be achieved. Another advantage of this approach is that only two receivers are required. The baseline (the displacement between phase centers of the two antennas) of this system is not zero, because the phase centers of the two antennas are not located at the same position. The baseline generates a fringe in the imaging system and its influence on the performance of the system is analyzed in this paper. The scanning speed of this system is also much faster than that of the Mills Cross imaging system and its influence on the resolution is also analyzed. It is found that the effect of the scanning speed is minimized when the beam scans along the equal-phase line of the fringe. This system can also be used as an active imaging system and this is discussed in another paper.
Lin, ZW, Zhu, JG, Zhong, JJ, Johansen, TH, Wang, XL & Yu, WY 1970, 'Visualization of magnetization processes of soft magnetic composites by the magneto-optical imaging technique', Journal of Applied Physics, 10th Joint Magnetism and Magnetic Materials Conference/International Magnetics Conference, AIP Publishing, Baltimore, MD, pp. 09K107-09K107.
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Attractive features of soft magnetic composites (SMCs) are high resistivity, isotropic three-dimensional flux behavior, and easy compression into the complicated shapes required in electromagnetic devices. Comprehensive understanding of the materials will help optimize design of electromagnetic devices. This paper presents the magnetization processes in a SMC sample in micron scale by means of the magneto-optical imaging technique. The sample was magnetized by magnetic fields tangential or perpendicular to the observation surface. It is observed that the flux density is higher at the particle region but lower at the interparticle space. When a tangential field is applied, the stray fields change polarization at the particle boundaries. Both results suggest that the magnetized sample behaves as a collection of individual magnetized particles rather than as a uniform and continuous magnetic substance such as soft iron although there are some interactions between neighboring particles.
Ling, SH, Yeung, CW, Chan, KY, Iu, HHC, Leung, FHF & IEEE 1970, 'A new hybrid particle swarm optimization with wavelet theory based mutation operation', 2007 IEEE CONGRESS ON EVOLUTIONARY COMPUTATION, VOLS 1-10, PROCEEDINGS, IEEE Congress on Evolutionary Computation, IEEE, Singapore, SINGAPORE, pp. 1977-1984.
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Lopez-Mariscal, C, Gutiérrez-Vega, JC, McGloin, D & Dholakia, K 1970, 'Laserless Optical Trapping', Frontiers in Optics 2007/Laser Science XXIII/Organic Materials and Devices for Displays and Energy Conversion, Frontiers in Optics, OSA.
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Lowe, D & Huang, X 1970, 'Adaptive Time-Frequency Codes for Ultra-Wideband', 2007 Third International Conference on Wireless and Mobile Communications (ICWMC'07), 2007 Third International Conference on Wireless and Mobile Communications (ICWMC'07), IEEE, pp. 38-44.
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This paper investigates inter-piconet interference (IPI) in the multi-band orthogonal frequency division multiplexing (MB-OFDM) ultra-wideband (UWB) standard. IPI is caused when the time-frequency codes (TFCs) that delineate MB-OFDM piconets collide. An upper-bound on the severity of the IPI problem is obtained through a theoretical analysis of data-rate-specific punctured convolutional codes. Using these results, several methods for adaptive TFCs are proposed and analyzed. Comprehensive simulation results show how packet error rates (PERs) for simultaneous operating piconets (SOPs) can be improved by up to 2 dB by enabling adaptive TFCs at the transmitter. Several combinations of data rate, TFC, channel model and interferer power are studied. © 2007 IEEE.
Lowe, D & Huang, X 1970, 'Complementary Channel Estimation and Synchronization for OFDM', The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007), The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007), IEEE, pp. 23-28.
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In this paper, we present a new type of packet preamble for orthogonal frequency division multiplexing (OFDM) systems that is based on a complementary sequence pair. It is shown how this approach permits a receiver to dynamically choose between frequency-domain equalization (FDE) and time-domain equalization (TDE). With FDE offering a low-complexity zero-forcing (ZF) equalization and TDE facilitating easy minimum mean square error (MMSE) estimation, it is concluded that a spectrally-flattened complementary sequence pair offers an outstanding combination of flexibility and performance. © 2007 IEEE.
Lowe, D & Huang, X 1970, 'Hybrid Automatic Repeat Requests for MB-OFDM Ultra-Wideband', 2007 Third International Conference on Wireless and Mobile Communications (ICWMC'07), 2007 Third International Conference on Wireless and Mobile Communications (ICWMC'07), IEEE.
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This paper analyzes the design and performance of hybrid automatic repeat request (HARQ) extensions to the multi- n band orthogonal frequency division multiplexing (MB-OFDM) ultra-wideband (UWB) standard. It is shown how both Type-I and Type-III HARQ can significantly reduce the packet error rate (PER) in realistic frequency-selective channels. An exhaustive search is used to find an optimal low-complexity Type-III HARQ scheme by deriving the distance spectra and bit error upper-bound for all sets of complementary puncturing matrices. The consequences of selecting sub-optimal puncturing matrices are also quantified. © 2007 IEEE.
Lowe, D & Huang, X 1970, 'Optimal Adaptive Hyperbolic Companding for OFDM', The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007), The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007), IEEE.
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In this paper, we derive and analyze a companding algorithm based on the hyperbolic tangent and inverse hyperbolic tangent functions for use in orthogonal frequency division multiplexing (OFDM) transceivers. Probability density functions (PDFs) that approximate the transmitted and received OFDM signals in the presence of additive white Gaussian noise (AWGN) are derived and used to analyze the degree of companding relative to the signal-to-noise ratio (SNR) and clipping level. A set of optimal companding linearity coefficients for the multiband OFDM (MB-OFDM) ultra-wideband (UWB) standard are presented. © 2007 IEEE.
Lu, DD-C 1970, 'Synthesis of Single Phase DC/AC Inverters', 2007 2nd IEEE Conference on Industrial Electronics and Applications, 2007 2nd IEEE Conference on Industrial Electronics and Applications, IEEE, Harbin, PEOPLES R CHINA, pp. 1922-1926.
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Lu, DD-C & Molavi, B 1970, 'Hysteresis Control of Single-Stage Power-Factor-Corrected Converters', 2007 2nd IEEE Conference on Industrial Electronics and Applications, 2007 2nd IEEE Conference on Industrial Electronics and Applications, IEEE, Harbin, PEOPLES R CHINA, pp. 943-+.
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Lu, DDC, Chu, RH, Sathiakumar, S & Agelidis, VG 1970, 'A buck converter with simple maximum power point tracking for power electronics education on solar energy systems', 2007 Australasian Universities Power Engineering Conference, 2007 Australasian Universities Power Engineering Conference (AUPEC), IEEE.
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This paper introduces a solar photovoltaic (PV) system suitable for undergraduate engineering education and training. The system consists of a buck converter using a simple maximum power point tracking (MPPT) method. Constant voltage control method is used for the approximate tracking and is implemented by analogue circuits. The circuit simplicity helps students to appreciate the benefit of MPPT in a short period of time without the need to work on complicated circuits and software coding. The proposed converter has been successfully implemented and served as a mini-project in a unit of study in power engineering studies.
Lu, H, Zhu, J, Guo, Y & Lin, Z 1970, 'A miniature short stroke tubular linear actuator and its control', 2007 INTERNATIONAL CONFERENCE ON ELECTRICAL MACHINES AND SYSTEMS, VOLS 1-4, International Conference on Electrical Machines and Systems, IEEE, Seoul, SOUTH KOREA, pp. 1879-+.
Madden, C & Piccardi, M 1970, 'A framework for track matching across disjoint cameras using robust shape and appearance features', 2007 IEEE Conference on Advanced Video and Signal Based Surveillance, 2007 IEEE Conference on Advanced Video and Signal Based Surveillance, IEEE, London, UK, pp. 188-193.
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This paper presents a framework based on robust shape and appearance features for matching the various tracks generated by a single individual moving within a surveillance system. Each track is first automatically analysed in order to detect and remove the frames affected by large segmentation errors and drastic changes in illumination. The object's features computed over the remaining frames prove more robust and capable of supporting correct matching of tracks even in the case of significantly disjointed camera views. The shape and appearance features used include a height estimate as well as illumination-tolerant colour representation of the individual's global colours and the colours of the upper and lower portions of clothing. The results of a test from a real surveillance system show that the combination of these four features can provide a probability of matching as high as 91 percent with 5 percent probability of false alarms under views which have significantly differing illumination levels and suffer from significant segmentation errors in as many as 1 in 4 frames. © 2007 IEEE.
Madden, C & Piccardi, M 1970, 'Detecting Major Segmentation Errors for a Tracked Person Using Colour Feature Analysis', 14th International Conference on Image Analysis and Processing (ICIAP 2007), 14th International Conference on Image Analysis and Processing (ICIAP 2007), IEEE, Modena, ITALY, pp. 524-+.
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Madden, C, Piccardi, M & Zuffi, S 1970, 'Comparison of Techniques for Mitigating the Effects of Illumination Variations on the Appearance of Human Targets', Lecture Notes in Computer Science vol.4842,Advances in Visual Computing, International Symposium on Visual Computing, Springer Berlin Heidelberg, Lake Tahoe, USA, pp. 116-127.
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Several techniques have been proposed to date to build colour invariants between camera views with varying illumination conditions. In this paper, we propose to improve colour invariance by using data-dependent techniques. To this aim, we compare the effectiveness of histogram stretching, illumination filtration, full histogram equalisation and controlled histogram equalisation in a video surveillance domain. All such techniques have limited computational requirements and are therefore suitable for real time implementation. Controlled histogram equalisation is a modified histogram equalisation operating under the influence of a control parameter [1]. Our empirical comparison looks at the ability of these techniques to make the global colour appearance of single human targets more matchable under illumination changes, whilst still discriminating between different people. Tests are conducted on the appearance of individuals from two camera views with greatly differing illumination conditions and invariance is evaluated through a similarity measure based upon colour histograms. In general, our results indicate that these techniques improve colour invariance; amongst them, full and controlled equalisation consistently showed the best performance.
Madden, CS & Piccardi, M 1970, 'Detecting Major Segmentation Errors for a Tracked Person Using Colour Feature Analysis', Proceedings of 14th International Conference on Image Analysis and Processing 2007, International Conference on Image Analysis and Processing, IEEE Computer Society, Modena, Italy, pp. 524-529.
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This paper presents a method to identify frames with significant segmentation errors in an individuals track by analysing the changes in appearance and size features along the frame sequence. The features used and compared include global colour histograms, local histograms and the bounding box size. Experiments were carried out on 26 tracks from 4 different people across two cameras with differing illumination conditions. By fusing two local colour features with a global colour feature, probabilities of segmentation error detection as high as 83 percent of human expert-identified major segmentation errors are achieved with false alarm rates of only 3 percent. This indicates that the analysis of such features along a track can be useful in the automatic detection of significant segmentation errors. This can improve the final results of many applications that wish to use robust segmentation results from a tracked person.
McGloin, D, Buchanan, J, Burnham, DR, Lorenz, RM, Edgar, JS, Jeffries, GDM, Zhao, Y & Chiu, DT 1970, 'Controlled fusion of femtoliter-volume aqueous droplets using holographic optical tweezers', 2007 European Conference on Lasers and Electro-Optics and the International Quantum Electronics Conference, 2007 European Conference on Lasers and Electro-Optics and the International Quantum Electronics Conference, IEEE.
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McGloin, D, Burnham, DR, Summers, MD, Rudd, DR, Shahvisi, A & Dewar, N 1970, 'Studies of droplet manipulation in optical traps', SPIE Proceedings, NanoScience + Engineering, SPIE, San Diego, CA.
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Nanda, P & Fernandes, R 1970, 'Quality of Service in Telemedicine', First International Conference on the Digital Society (ICDS'07), First International Conference on the Digital Society (ICDS'07), IEEE, Guadaloupe, French Carribean, pp. 1-6.
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© 2007 IEEE. Telemedicine is one of the fastest growing fields with several innovations happening in managed health-care. With Internet and its infrastructures playing important role in the success of this field, it is not advisable to run some of the critical applications like high quality audio and video involved in telemedicine without proper Quality of Service (QoS) built on to the network. This paper focuses on two telemedicine setups that have been implemented on different backbone technologies. The first case discusses a virtual critical care unit that is setup for communication on an Asynchronous Transfer Mode (ATM) backbone and a possible model on how QoS for important traffic streams can be achieved in ATM. The second case discusses a minimal access operation that was remotely conducted on a patient with the help of telerobotics on a Multi Protocol Label Switching (MPLS) setup and provides a possible solution for achieving quality of service through MPLS in that scenario.
NANDA, P & SIMMONDS, AJ 1970, 'EFFECT OF NETWORK POLICIES ON INTERNET TRAFFIC ENGINEERING', Innovative Applications of Information Technology for the Developing World, Proceedings of the 3rd Asian Applied Computing Conference, PUBLISHED BY IMPERIAL COLLEGE PRESS AND DISTRIBUTED BY WORLD SCIENTIFIC PUBLISHING CO., Kathmandu, Nepal, pp. 300-307.
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Ngo, DT, Tuan, HD & Nguyen, HH 1970, 'Jointly Optimal Signature Sequences and Power Allocation for CDMA', 2007 IEEE International Conference on Acoustics, Speech and Signal Processing - ICASSP '07, 2007 IEEE International Conference on Acoustics, Speech, and Signal Processing, IEEE.
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The problems of designing signature sequences and power allocation policy for code-division multiple access (CDMA) are important and have been the subject of intensive research in recent years. Two different criteria adopted in such design problems are the user capacity and the information-theoretic capacity. Regarding the maximization of the information-theoretic capacity, most of the previous works only consider the optimizations of signature sequences and power allocation separately. In contrast, this paper presents a jointly optimal design of signature sequences and power allocation under the sum power constraint. The proposed design is of closed-form and applicable for the general case of correlated signals and colored noise. Numerical results verify the superiority of the proposed design over the existing ones. © 2007 IEEE.
Ngoc, HP, Matsui, Y, Attaviriyanupap, P & Iso, O 1970, 'Sail Generator Feasibility Study', 2007 7th International Conference on Power Electronics and Drive Systems, 2007 7th International Conference on Power Electronics and Drive Systems, IEEE, Bangkok, Thailand, pp. 903-909.
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In this paper, the authors propose a new small size vertical axis wind power generation system for operating in standalone mode at low speed under weak wind conditions. The proposed system consists of a sail turbine and an outer zipper rotor generator. The sail turbine is designed so that it can catch energy from weak wind and also can protect itself from damage under strong wind. The generator is designed for standalone operation without brush and gear. The feasibility study of the proposed generation system is conducted using Fourier expansion. Analytical results show that the target output can be achieved.
Nguyen, NT, Nguyen, HT & Su, S 1970, 'Advanced robust tracking control of a powered wheelchair system', Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings, pp. 4767-4770.
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In this paper, the dynamic multivariable model of the wheelchair system is obtained including the presence of transportation lags. The triangular diagonal dominance (TDD) decoupling technique is applied to reduce this multivariable control problem into two independent scalar control problems. An advanced robust control technique for the wheelchair has been developed based on the combination of a TDD decoupling strategy and neural network controller design. The results obtained from the real-time implementation confirm that robust performance for this multivariable wheelchair control system can indeed be achieved. © 2007 IEEE.
Nguyen, NT, Nguyen, HT & Su, S 1970, 'Advanced robust tracking control of a powered wheelchair system', 2007 29th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2007 29th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, IEEE, Lyon, France, pp. 4767-4770.
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In this paper, the dynamic multivariable model of the wheelchair system is obtained including the presence of transportation lags. The triangular diagonal dominance (TDD) decoupling technique is applied to reduce this multivariable control problem into two independent scalar control problems. An advanced robust control technique for the wheelchair has been developed based on the combination of a TDD decoupling strategy and neural network controller design. The results obtained from the real-time implementation confirm that robust performance for this multivariable wheelchair control system can indeed be achieved.
Nguyen, TT, Tuan, HD & Nguyen, TQ 1970, 'Robust watermarking with improved modified spread spectrum', 2007 International Symposium on Communications and Information Technologies, 2007 International Symposium on Communications and Information Technologies, IEEE, Sydney, Australia, pp. 1108-1112.
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This paper presents a robust approach for spread spectrum (SS) based watermarking process. Unlike the traditional SS or other improvements, this method can work properly in case of absence of watermark and achieve good performance. If the channel has no
Ni, W, Guo, B & Yang, L 1970, 'Example based Super-Resolution Algorithm of Video in Contourlet Domain', Fourth International Conference on Image and Graphics (ICIG 2007), 2007 4th International Conference on Image and Graphics, IEEE, PEOPLES R CHINA, Sichuan Univ, Chengdu, pp. 13-+.
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Otoom, AF, Gunes, H & Piccardi, M 1970, 'Towards Automatic Abandoned Object Classification in Visual Surveillance Systems', Proceedings of Asia-Pacific Workshop 2007 on Visual Information Processing, Asia-Pacific Workshop on Visual Information Processing, National Cheng Kung University, Tainan, Taiwan, pp. 143-149.
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One of the core components of any visual surveillance system is object classification, where detected objects are classified into different categories of interest. Although in airports or train stations, abandoned objects are mainly luggage or trolleys, none of the existing works in the literature have attempted to classify or recognize trolleys. In this paper, we analyze and classify images of trolleys, bags, persons, and groups of people by using various shape features. We conducted a set of experiments with a number of uncluttered (images collected from the Internet with clear background) and cluttered images (images segmented out from the background in real videos) using various criteria. Our experimental results show that the features extracted enable 100% recognition accuracy for the trolley category. For our four-class object recognition problem, we achieved an overall recognition accuracy of 83.3% and an average false positive rate of 6%.
Otsuki, N, Yoshizawa, S & Miyanaga, Y 1970, 'Evaluation of Adaptive Modulation and Coding Applied on a 400 Mbps OFDM Wireless Communication System', SYSTEMS MODELING AND SIMULATION: THEORY AND APPLICATIONS, ASIA SIMULATION CONFERENCE 2006, Asian Simulation Conference, Springer Japan, Tokyo, JAPAN, pp. 430-434.
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Paisitkriangkrai, S, Shen, C & Zhang, J 1970, 'An Experimental Evaluation of Local Features for Pedestrian Classification', 9th Biennial Conference of the Australian Pattern Recognition Society on Digital Image Computing Techniques and Applications (DICTA 2007), 9th Biennial Conference of the Australian Pattern Recognition Society on Digital Image Computing Techniques and Applications (DICTA 2007), IEEE, Glenelg, SA, pp. 53-60.
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The ability to detect pedestrians is a first important step in many computer vision applications such as video surveillance. This paper presents an experimental study on pedestrian detection using state-of-the-art local feature extraction and support vec
Pérez, Ó, Piccardi, M, García, J & Molina, JM 1970, 'Comparison of Classifiers for Human Activity Recognition', Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), International Work-Conference on the Interplay, Springer Berlin Heidelberg, La Manga del Mar Menor, Spain, pp. 192-201.
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The human activity recognition in video sequences is a field where many types of classifiers have been used as well as a wide range of input features that feed these classifiers. This work has a double goal. First of all, we extracted the most relevant features for the activity recognition by only utilizing motion features provided by a simple tracker based on the 2D centroid coordinates and the height and width of each person's blob. Second, we present a performance comparison among seven different classifiers (two Hidden Markov Models (HMM), a J.48 tree, two Bayesian classifiers, a classifier based on rules and a Neuro-Fuzzy system). The video sequences under study present four human activities (inactive, active, walking and running) that have been manual labeled previously. The results show that the classifiers reveal different performance according to the number of features employed and the set of classes to sort. Moreover, the basic motion features are not enough to have a complete description of the problem and obtain a good classification. © Springer-Verlag Berlin Heidelberg 2007.
Pérez, Ó, Piccardi, M, García, J, Patricio, MÁ & Molina, JM 1970, 'Comparison Between Genetic Algorithms and the Baum-Welch Algorithm in Learning HMMs for Human Activity Classification', Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), Evo Workshops, Springer Berlin Heidelberg, Valencia, Spain, pp. 399-406.
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A Hidden Markov Model (HMM) is used as an efficient and robust technique for human activities classification. The HMM evaluates a set of video recordings to classify each scene as a function of the future, actual and previous scenes. The probabilities of transition between states of the HMM and the observation model should be adjusted in order to obtain a correct classification. In this work, these matrixes are estimated using the well known Baum-Welch algorithm that is based on the definition of the real observations as a mixture of two Gaussians for each state. The application of the GA follows the same principle but the optimization is carried out considering the classification. In this case, GA optimizes the Gaussian parameters considering as a fitness function the results of the classification application. Results show the improvement of GA techniques for human activities recognition. © Springer-Verlag Berlin Heidelberg 2007.
Piccardi, M & Perez, O 1970, 'Hidden Markov Models with Kernel Density Estimation of Emission Probabilities and their Use in Activity Recognition', 2007 IEEE Conference on Computer Vision and Pattern Recognition, 2007 IEEE Conference on Computer Vision and Pattern Recognition, IEEE, Minneapolis, pp. 1-8.
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In this paper, we present a modified hidden Markov model with emission probabilities modelled by kernel density estimation and its use for activity recognition in videos. In the proposed approach, kernel density estimation of the emission probabilities is operated simultaneously with that of all the other model parameters by an adapted Baum-Welch algorithm. This allows us to retain maximum-likelihood estimation while overcoming the known limitations of mixture of Gaussions in modelling certain probability distributions. Experiments on activity recognition have been performed on groundtruthed data from the CAVIAR video surveillance database and reported in the paper. The error on the training and validation sets with kernel density estimation remains around 14-16% while for the conventional Gaussian mixture approach varies between 15 and 24%, strongly depending on the initial values chosen for the parameters. Overall, kernel density estimation proves capable of providing more flexible modelling of the emission probabilities and, unlike Gaussian mixtures, does not suffer from being highly parametric and of difficult initialisation. © 2007 IEEE.
Piccardi, M & Perez, O 1970, 'Hidden Markov models with kernel density estimation of emission probabilities and their use in activity recognition', 2007 IEEE CONFERENCE ON COMPUTER VISION AND PATTERN RECOGNITION, VOLS 1-8, IEEE Conference on Computer Vision and Pattern Recognition, IEEE, Minneapolis, MN, pp. 3774-+.
Pingzhou Tu, Xiaojing Huang & Dutkiewicz, E 1970, 'Diversity performance of interleaved spread spectrum OFDM signals over frequency selective multipath fading channels', 2007 International Symposium on Communications and Information Technologies, 2007 International Symposium on Communications and Information Technologies, IEEE, Sydney, Australia, pp. 184-189.
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In this paper we propose an interleaved spread spectrum orthogonal frequency division multiplexing (ISS-OFDM) system for achieving both frequency diversity and time diversity and investigate the system performance over frequency selective fading channels. The purpose is to exploit the diversity capability of OFDM systems, develop efficienct spectrum spreading technique and improve the system performance against frequency selective channel fading. At the transmitter, the ISS-OFDM signal is generated by employing spread spectrum modulation and interleaving techniques. At the receiver, the received signals are combined by using maximum ratio combining (MRC) technique. The simulation indicates that the ISS-OFDM system has improved performance in multipath fading channels. Another unique characteristic is that the spectrum spreading factor and diversity order provided by the system are reconfigurable to achieve cognitive communications. © 2007 IEEE.
Pingzhou Tu, Xiaojing Huang & Dutkiewicz, E 1970, 'Peak-to-average power ratio performance of interleaved spread spectrum OFDM signals', 2007 International Symposium on Communications and Information Technologies, 2007 International Symposium on Communications and Information Technologies, IEEE, Sydney, AUSTRALIA, pp. 82-86.
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Pradabpet, C, Miyanaga, Y & Dejhan, K 1970, 'PAPR reduction in OFDM systems by hybrid algorithm based on the PTS and APPR methods', Proceedings of the 4th IASTED Asian Conference on Communication Systems and Networks, AsiaCSN 2007, pp. 19-23.
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In this report, we propose a new PAPR reduction technique by a hybrid algorithm based on a partial transmit sequence (PTS) and adaptive peak power reduction (APPR) method. This technique is used in a system based on Orthogonal Frequency Division Multiplexing (OFDM). OFDM has many orthogonally modulated subcarriers which unexpectedly give a large peak to average power ratio (PAPR) and tends to reduce the power efficiency of a RF amplifier. The input data using the PTS method, a sequence of input data is rearranged for the reduction of PAPR and fed to APPR process. The APPR method controls the peak level of the modulation signal based on an adaptive algorithm which reduces modulation signals over a predefined range. A proposed reduction method consists of these two methods and realizes bolt advantages at the same time. As simulation results, the proposed method shows the improvement on PAPR and also the bit error rate performance of an OFDM system.
Pradabpet, C, Yoshizawa, S, Miyanaga, Y & Dejhan, K 1970, 'A new PAPR reduction in OFDM-WLAN systems by hybrid algorithm of PTS and APPR methods', 2007 Asia-Pacific Conference on Communications, 2007 Asia Pacific Conference on Communications, IEEE.
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Raad, IS & Xiaojing Huang 1970, 'A new approach to BSOFDM - parallel concatenated spreading matrices OFDM', 2007 International Symposium on Communications and Information Technologies, 2007 International Symposium on Communications and Information Technologies, IEEE, Sydney, Australia, pp. 77-81.
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This paper proposes a new approach to Block Spread OFDM called Parallel Concatenated Spreading Matrices OFDM (PCSM-OFDM). While BSOFDM improved the overall BER performance on OFDM in frequency selective channels, this new approach further improves the BER of BSOFDM by a 3dB gain. This is achieved through increasing the diversity of the transmitted samples by concatenating two spreading matrices in parallel to BSOFDM. © 2007 IEEE.
Raad, IS, Huang, X & Lowe, D 1970, 'A Study of Different Angles for the New Spread Matrix for BSOFDM in UWB Channels', 2007 Third International Conference on Wireless and Mobile Communications (ICWMC'07), 2007 Third International Conference on Wireless and Mobile Communications (ICWMC'07), IEEE, Guadeloupe, French Caribbean.
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This paper presents a study into different angles for the New spread matrix developed for BSOFDM. It varies the angles for the matrix to develop different constellation schemes which are useful in overcoming the frequency selective channels which are encountered in mobile communication systems. Previously it has been discussed that this new matrix (the rotation matrix) has some advantages over Hadamard and the rotated Hadamard matrix in certain channels. This paper presents a study of varies angles with this new matrix over the UWB channels CM1 to CM4.1 © 2007 IEEE.
Raad, IS, Huang, X & Lowe, D 1970, 'A study of different decoders for the new rotation spreading matrix for block spread OFDM in UWB channels', 2007 IEEE International Conference on Telecommunications and Malaysia International Conference on Communications, 2007 IEEE International Conference on Telecommunications and Malaysia International Conference on Communications, IEEE, Penang, MALAYSIA, pp. 372-376.
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Raad, IS, Huang, X & Lowe, D 1970, 'Higher order rotation spreading matrix for block spread OFDM', 2007 IEEE International Conference on Telecommunications and Malaysia International Conference on Communications, 2007 IEEE International Conference on Telecommunications and Malaysia International Conference on Communications, IEEE, Penang, MALAYSIA, pp. 377-381.
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Raad, IS, Huang, X & Raad, R 1970, 'A Study of Different Angles for Higher Order Rotation Spreading Matrix for BSOFDM in UWB Channels', The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007), The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007), IEEE, pp. 18-23.
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This paper presents a study into different angles for higher order Rotation spreading matrix developed for BSOFDM. It was shown previously that for block size M = 2 that the angle α = π/3 achieved the best result in terms of BER in UWB channels. It was discovered that this was no longer the case when the higher order Rotation spreading matrix was used for larger M sized blocks and that other angles produced better results which proves that the Rotation spreading matrix advantage over existing spreading matrices such as the Hadamard is its flexibility to be adapted to different communication systems. © 2007 IEEE.
Raad, IS, Huang, X & Raad, R 1970, 'New Higher Order Rotation Spreading Matrix for BSOFDM', The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007), The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007), IEEE, pp. 17-22.
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Previously a new matrix called the Rotation spreading matrix was proposed for Block Spread OFDM which had advantages over other well known spreading matrices such as the Hadamard in frequency selective channels such the UWB channels. Then a new paper discussed a method to expand this Rotation spreading matrix into higher order allowing the system BSOFDM to achieve higher order matrices which still showed excellent orthogonal properties which can be used in these frequency selective channels. This work is continued on the Rotation spreading matrix and this paper presents another method to expand the Rotation spreading matrix based on Complete Complementary Sets of Sequences which the authors have shown to have excellent properties in higher order matrices. This paper discusses the new method and presents a comparison between the two mentioned methods. © 2007 IEEE.
Ren, Z, Fang, X, Wang, S, Qiu, J, Zhu, JG, Guo, Y, Yang, X, Ha, JH, Wang, Z, Sun, Y & Zhang, J 1970, 'Design optimization of an interior-type permanent magnet BLDC motor using PSO and improved MEC', 2007 INTERNATIONAL CONFERENCE ON ELECTRICAL MACHINES AND SYSTEMS, VOLS 1-4, International Conference on Electrical Machines and Systems, IEEE, Seoul, SOUTH KOREA, pp. 621-+.
Ren, Z, Fang, X, Wang, S, Qiu, J, Zhu, JG, Guo, Y, Yang, X, Ha, JH, Wang, Z, Sun, Y & Zhang, J 1970, 'Design optimization of an interior-type permanent magnet BLDC motor using PSO and improved MEC', Proceeding of International Conference on Electrical Machines and Systems, ICEMS 2007, International Conference on Electrical Machines and Systems, IEEE, Seoul, Korea, pp. 1350-1353.
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In this paper, an improved magnetic equivalent circuit (MEC) is applied to calculate the nonlinear magnetic field in an interior-type permanent-magnet (IPM) brushless DC (BLDC) motor. Compared with the finite element method, the MEC method is much more time efficient, whereas compared with the conventional MEC method, the improved MEC is more accurate since it takes the complicate topological structure of the motor into account. A rough design of the IPM BLDC motor was firstly conducted by the improved MEC method. The particle swarm optimization (PSO) algorithm is then employed to refine the design for optimal structural parameters that result in the lowest cost and highest performance.
Ridoux, J & Veitch, D 1970, 'A Methodology for Clock Benchmarking', 2007 3rd International Conference on Testbeds and Research Infrastructure for the Development of Networks and Communities, 2007 3rd International Conference on Testbeds and Research Infrastructure for the Development of Networks and Communities, IEEE, IEEE, pp. 1-10.
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Ridoux, J & Veitch, D 1970, 'Ten Microseconds Over LAN, for Free', 2007 IEEE International Symposium on Precision Clock Synchronization for Measurement, Control and Communication, 2007 IEEE International Symposium on Precision Clock Synchronization for Measurement, Control and Communication, IEEE, IEEE, pp. 105-109.
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Samaraweera, DN & Lu, DD-C 1970, 'Novel Implementation of Average Current Mode Controlled Power-Factor-Correction Converters', 2007 2nd IEEE Conference on Industrial Electronics and Applications, 2007 2nd IEEE Conference on Industrial Electronics and Applications, IEEE, Harbin, PEOPLES R CHINA, pp. 1468-1472.
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Sejvar, JJ, Hossain, J, Fischer, M, Gurley, E, Saha, SK & Luby, SP 1970, 'Long-term outcomes of Japanese encephalitis in Bangladesh', AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE, 56th Annual Meeting of the American-Society-of-Tropical-Medicine-and-Hygiene, AMER SOC TROP MED & HYGIENE, Philadelphia, PA, pp. 298-298.
Sijun Lu, Jian Zhang & David Feng 1970, 'An efficient method for detecting ghost and left objects in surveillance video', 2007 IEEE Conference on Advanced Video and Signal Based Surveillance, 2007 IEEE Conference on Advanced Video and Signal Based Surveillance, AVSS 2007, IEEE, London, pp. 540-545.
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This paper proposes an efficient method for detecting ghost and left objects in surveillance video, which, if not identified, may lead to errors or wasted computation in background modeling and object tracking in surveillance systems. This method contain
Sinha, S & Chaczko, Z 1970, 'MAGNA: Middleware for dynamic and resource constrained sensor networks', The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007), The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007), IEEE, pp. 62-71.
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Traditionally sensor networks have been typically enterprise architecture driven, where a dedicated server is used to collect data and record in a database for analysis and historical reference. While modern day computing capabilities allow drilling through megabytes of information, it is not always the most costeffective solution. The other alternative is the use of smart sensors, whereby each node is capable of routing data to any destination using a HTTP server. This not only escalates the cost of each node but also imposes severe strain on the network - thus necessitating developers and architects to evaluate the impact of swarming and "lazy routing". The notion of the proposed middleware solution (MAGNA) is to bring about context-based processing and intelligent data capture and/or filter right up to the sensor nodes through the use of powerful "sub-net" controllers. The paper will explore the application of MAGNA as a platform capable of offering ambient intelligence in a typical sensor network environment, integrating everyday appliances and our life-style together. In doing so, two primary methodologies will be discussed on which MAGNA is essentially based, namely the Soft Systems Methodology and the Banking Model approach. © 2007 IEEE.
Steele, RJ, Secombe, C & Brookes, WC 1970, 'Using Wireless Sensor Networks for Aged Care: The Patient's Perspective', Pervasive Health Conference and Workshops, 2006, International Conference on Pervasive Computing Technologies for Healthcare, IEEE Computer Society Press, Innsbruck, Austria, pp. 1-10.
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This paper presents the findings of a qualitative study on the perceptions and thoughts of elderly people on the use of current sensor network technology for assisted aged care. Focus groups of elderly people were presented with examples of current sensor nodes and example scenarios of their use, and then invited to provide input on a range of issues surrounding the design and use of the technology. The focus group findings were verified with a health care professional as a control measure. This study examines sensing based interaction, implementation methodologies and user acceptance issues specifically for the elderly, and from the elderly's perspective. A significant finding of the study is that the two most important factors for elderly acceptance of sensor technology are cost and control
Su, SW, Huang, S, Wang, L, Celler, BG, Savkin, AV, Guo, Y, Cheng, T & IEEE 1970, 'Nonparametric Hammerstein model based model predictive control for heart rate regulation', 2007 ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY, VOLS 1-16, IEEE Engineering in Medicine and Biology Society Annual Conference, Medicine and Biology Society, Lyon, France, pp. 2984-2987.
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This paper proposed a novel nonparametric model based model predictive control approach for the regulation of heart rate during treadmill exercise. As the model structure of human cardiovascular system is often hard to determine, nonparametric modelling is a more realistic manner to describe complex behaviours of cardiovascular system. This paper presents a new nonparametric Hammerstein model identification approach for heart rate response modelling. Based on the pseudo-random binary sequence experiment data, we decouple the identification of linear dynamic part and input nonlinearity of the Hammerstein system. Correlation analysis is applied to acquire step response of linear dynamic component. Support Vector Regression is adopted to obtain a nonparametric description of the inverse of input static nonlinearity that is utilized to form an approximate linear model of the Hammerstein system. Based on the established model, a model predictive controller under predefined speed and acceleration constraints is designed to achieve safer treadmill exercise. Simulation results show that the proposed control algorithm can achieve optimal heart rate tracking performance under predefined constraints.
Su, SW, Nguyen, J, Jarman, R, Huang, S, Chen, W, Celler, BG, Bao, J, Lee, P & Weng, K 1970, 'A new decentralized fault tolerant control strategy and the fault accommodation of coupled drives', Proceedings of the 8th International Conference on Intelligent Technologies (InTech'07), International Conference on Intelligent Technologies, University of Technology, Sydney, Sydney, Australia, pp. 313-317.
Sugawara, T, Yoshizawa, S & Miyanaga, Y 1970, 'Dynamic Reconfigurable Architecture for a Low-Power Despreader in VSF-OFCDM Systems', 2007 IEEE International Symposium on Circuits and Systems (ISCAS), 2007 IEEE International Symposium on Circuits and Systems (ISCAS), IEEE, New Orleans, LA, pp. 2287-+.
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Tan, J, lu, HHC, Ling, SH & IEEE 1970, 'Symbolic representation of border collision bifurcation in switching DC/DC converters', IECON 2007: 33RD ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS SOCIETY, VOLS 1-3, CONFERENCE PROCEEDINGS, 33rd Annual Conference of the IEEE-Industrial-Electronics-Society, IEEE, Taipei, TAIWAN, pp. 2010-2014.
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Thomas-Kerr, J, Burnett, I & Ritz, C 1970, 'Intelligent Multimedia Delivery? It’s a question of semantics', 2007 International Symposium on Communications and Information Technologies, 2007 International Symposium on Communications and Information Technologies, IEEE, Sydney, AUSTRALIA, pp. 473-478.
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Thomas-Kerr, J, Janneck, J, Mattavelli, M, Burnett, I & Ritz, C 1970, 'Reconfigurable Media Coding: Self-Describing Multimedia Bitstreams', 2007 IEEE Workshop on Signal Processing Systems, 2007 IEEE Workshop on Signal Processing Systems, IEEE, Shanghai, PEOPLES R CHINA, pp. 319-+.
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Tien, D & Jia, W 1970, 'Automatic road extraction from aerial images: A contemporary survey', Fourth International Conference on Information Technology and Applications, ICITA 2007, International Conference on Information Technology and Applications, Macquarie Scientific Publishing, Sydney, Australia, Harbin, China, pp. 294-299.
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Wenjing Jia is currently a part-time Research Associate at the Charles Sturt University, Australia This paper describes a contemporary literature review outcomes on automatic road extraction from aerial images. The main focus is on automatic road extraction, but it also discusses the possible extension on automatic extraction of other man-made objects, such as buildings, dams, swimming pools, etc.. This paper first discusses the background of the topic, including the difficulties of the problem and the evaluation methods. Then Ave typical method currently proposed for road extraction are reviewed. Technical details are critically reviewed for future reference and comparison. The advantages and disadvantages of each approach are discussed. Based on this discussion, future work and possible methods are suggested.
Tran, LC, Mertins, A, Dutkiewicz, E & Huang, X 1970, 'Space-Time-Frequency Codes in MB-OFDM UWB communications: advanced order-8 STFC and its performance', 2007 International Symposium on Communications and Information Technologies, 2007 International Symposium on Communications and Information Technologies, IEEE, Sydney, AUSTRALIA, pp. 380-+.
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Tran, NN, Tuan, HD & Nguyen, HH 1970, 'Optimal Training Signals and Detection for OFDM Under Colored Noise', 2007 IEEE 66th Vehicular Technology Conference, 2007 IEEE 66th Vehicular Technology Conference, IEEE, Baltimore, MD, pp. 1327-1331.
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Based on convex programming, this paper presents the optimal training signal design for orthogonal frequency-division multiplexing (OFDM) under colored noise. An effective method for OFDM symbol detection with the use of precoding is also described. Both
Tran, NN, Tuan, HD & Nguyen, HH 1970, 'Orthogonal affine precoder design for jointly optimal channel estimation and symbol detection in MIMO-OFDM systems', 2007 International Symposium on Communications and Information Technologies, 2007 International Symposium on Communications and Information Technologies, IEEE, Sydney, Australia, pp. 983-988.
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Affine precoding superimposes training signals on linearly precoded data. It enhances symbol recovery and effectively identifies the frequency-selective fading channel. Previous works have shown its advantage over the standard timemultiplexed training. T
Tran, TH, Kwok, NM, Scheding, S & Ha, QP 1970, 'Dynamic Modelling of Wheel-Terrain Interaction of a UGV', 2007 IEEE International Conference on Automation Science and Engineering, 2007 IEEE International Conference on Automation Science and Engineering, IEEE, Scottsdale, Arizona, U.S.A., pp. 369-374.
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Understanding the vehicle-terrain interaction is essential for autonomous and safe operations of skid-steering unmanned ground vehicles (UGVs). This paper presents a comprehensive analysis of the dynamic processes involved in this interaction, using the vehicle kinetics and the theory of terramechanics to derive systematically shear displacement, reaction force, and load distribution for a wheel. The new model is then summarized in the form of an algorithm to allow for computation of characteristic performance of the interaction such as slip ratios, rolling resistance, and moment of turning resistance for a number of terrain types. Given the current state of the vehicle and terrain parameters, the model can be used to estimate its next states and to predict the vehicle running path. The development is illustrated by simulation and verified with experimental data.
Travaly, Y, Mandeep, B, Carbonell, L, Tokei, Z, Van Olmen, J, Iacopi, F, Van Hove, M, Stucchi, M & Maex, K 1970, 'On a more accurate assessment of scaled copper/low-k interconnects performance', IEEE TRANSACTIONS ON SEMICONDUCTOR MANUFACTURING, IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, pp. 333-340.
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Tuan, HD, Nguyen, HH, Tran, NN, Nguyen, V & IEEE 1970, 'An effective global optimization algorithm for wireless MIMO channel estimation', 2007 2ND IEEE INTERNATIONAL WORKSHOP ON COMPUTATIONAL ADVANCES IN MULTI-SENSOR ADAPTIVE PROCESSING, IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing, IEEE, St Thomas, VI, pp. 209-212.
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The problem of channel estimation for spatially correlated fading multiple-input multiple-output (MIMO) channels is considered. Based on the channel's second order statistic, the minimum mean-square error (MMSE) channel estimator that works with the supe
Tuan, HD, Pham, DH, Vo, B & Nguyen, TQ 1970, 'Entropy of General Gaussian Distributions and MIMO Channel Capacity Maximizing Precoder and Decoder', 2007 IEEE International Conference on Acoustics, Speech and Signal Processing - ICASSP '07, 2007 IEEE International Conference on Acoustics, Speech, and Signal Processing, IEEE, Honolulu, HI, pp. 325-328.
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Exploiting channel state information at the transmitter and receiver to design an optimal linear precoder and decoder for a multiple-input multiple-output (MIMO) communication system is an active research area. The design is often based on the informatio
Wang, JC-P, Abolhasan, M, Franklin, DR, Safaei, F & Lipman, J 1970, 'On Separating Route Control and Data Flows in Multi-radio Multi-hop Ad Hoc Network.', ICON, IEEE International Conference on Networks, IEEE, Adelaide, Australia, pp. 19-24.
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Ad hoc networks typically require a significant amount of routing and control information to be distributed in a timely and reliable manner throughout the network, particularly in dynamic environments. As traffic levels increase and the network becomes more heavily congested, there is an increased probability that these critical packets are lost, resulting in obsolete control information being used to make important decisions. This would further compound the problem of network congestion and lead to a very rapid loss of connectivity and throughput. Given this, we argue the solutions to these problems should not rely on putting extra bandwidth on a radio interface. Instead, we should exploit the use of multiple radios to ensure the route can be firmly established. In this paper, we propose a multi-radio solution which reserves one radio channel exclusively for routing. Our simulation results have demonstrated that using a separate radio for routing protocol would dramatically improve reliability in heavily loaded ad hoc wireless networks, thereby effectively alleviating the impact of network congestion. © 2007 IEEE.
Wang, JC-P, Abolhasan, M, Franklin, DR, Safaei, F, Lipman, J & IEEE 1970, 'On separating route control and data flows in multi-radio multi-hop ad hoc network', 2007 15TH IEEE INTERNATIONAL CONFERENCE ON NETWORKS, 15th IEEE International Conference on Networks, IEEE, Adelaide, AUSTRALIA, pp. 114-119.
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Wang, JC-P, Abolhasan, M, Safaei, F, Franklin, D & IEEE 1970, 'A survey on control separation techniques in multi-radio multi-channel MAC protocols', 2007 INTERNATIONAL SYMPOSIUM ON COMMUNICATIONS AND INFORMATION TECHNOLOGIES, VOLS 1-3, International Symposium on Communications and Information Technologies, IEEE, Sydney, Australia, pp. 854-859.
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The rapid diminishing in the cost of commodity wireless hardware in recent years has prompted the use of multiple radios to improve the capacity of wireless networks. However, the research has shown that the improvement obtained from using multiple radios does not solely depend on the number of radios, but primarily on how these radios can be integrated in a constructive manner. A common way of integration multiple radios is to use a dedicated radio for control. To date, a number of multi-radio MAC protocol are employing a dedicated radio to control and coordinate the other radios, though the approaches are varied from one to another. In this paper, the control separation techniques in the multi-radio multi-channel MAC have been surveyed, and a classification of control separation techniques is provided. Moreover, this study points out the open research issues and intends to spark new interests and developments in this field.
Wang, L, Su, SW, Chan, GSH, Celler, BG & IEEE 1970, 'A mathematical model of the cardiovascular system under exercise', 2007 ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY, VOLS 1-16, IEEE Engineering in Medicine and Biology Society Annual Conference, Medicine and Biology Society, Lyon, France, pp. 1014-1017.
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A mathematical model, based on our previous pulsatile nonlinear multi-element cardiovascular model, was tested and improved to study cardiovascular response under graded exercise levels. Ten healthy subjects were studied using cycle-ergometry exercise test with constant workloads ranging from 25 Watt to 125 Watt. Breath by breath gas exchange, heart rate, cardiac output, stroke volume and blood pressure were measured at each stage. Based on the experimental data, firstly we proved that our previous model is capable to regenerate the cardiovascular variables observed in the subjects under different exercise levels. Secondly, we improved the model by incorporating a robust and efficient function to estimate metabolic demand. Then the new model can estimate both cardiovascular variables and metabolic demand with its simulation results within the range of SD (Standard Deviation, N=10) of the experimental data.
Wang, XL, Lin, CT, Liang, B, Yu, S, Ooi, S, Hirata, K, Ding, SY, Shi, DQ, Dou, SX, Lin, ZW & Zhu, JG 1970, 'Josephson-vortex flow resistance in Bi2Sr2Ca2Cu3Oy single crystals and its possible application in the manipulation of spin and charge textures in diluted magnetic semiconductors', Journal of Applied Physics, 10th Joint Magnetism and Magnetic Materials Conference/International Magnetics Conference, AIP Publishing, Baltimore, MD, pp. 09G116-09G116.
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In this work, the flow of the Josephson vortices (JVs) has been studied for the highly anisotropic Bi2Sr2Ca2Cu3Oy (Bi2223) single crystals. A giant flow of JVs or giant positive magnetoresistance (MR) of over 500%–2000% was obtained in fields of 0.1–5T and remained almost constant over a wide temperature range from 110 down to 4K, in contrast to superconducting vortices (SVs), which only produced MR in the vicinity of Tc. The flow of the JVs is expected to be much faster than that of SVs. It is proposed that the Josephson vortices could be used to manipulate the spin and charge in magnetic semiconductors in the same way as SVs [M. Berciu, T. G. Rappoport, and B. Jankó, Nature (London) 435, 71 (2005)]. Hybrid systems consisting of layered superconductors with Josephson junctions and magnetic semiconductors will be discussed.
Wang, XL, Peleckis, G, Dou, SX, Liu, RS & Zhu, JG 1970, 'Large positive magnetoresistance effect below Curie temperature in In1.90−xMn0.1SnxO3', Journal of Applied Physics, 10th Joint Magnetism and Magnetic Materials Conference/International Magnetics Conference, AIP Publishing, Baltimore, MD, pp. 09H121-09H121.
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We report on the magnetoresistance (MR) and magnetic properties of In1.90−xMn0.1SnxO3 (0⩽x⩽0.06) oxide. All samples were found to be ferromagnetic below TC=46K. Sn doping changed In1.90Mn0.1O3 from an insulator to a highly conducting phase at 300K. A positive MR effect was observed over a wide temperature range just below TC. Calculated MR values reached a maximum of 20% at 5K. A change in the MR effect, from positive to negative, occurred under magnetic field H>4T at 5K. The results of x-ray absorption near-edge spectroscopy indicated that Mn ions are present both as Mn2+ and Mn4+.
Wang, Y, Zhu, J & Guo, Y 1970, 'Comparative Study of Control Strategies for Permanent Magnet Motors', Proceedings of 2nd International Forum on Systems and Mechatronics, International Forum on Systems and Mechatronics, the organisers of the International Forum on Systems and Mechatronics, Tainan, Taiwan, pp. 439-444.
Wang, Y, Zhu, J & Guo, Y 1970, 'Improved Discrete Space Vector Modulation Scheme for DTC Controlled PMSM', Proceedings of 2nd International Forum on Systems and Mechatronics, International Forum on Systems and Mechatronics, organisers of the International Forum on Systems and Mechatronics, Tainan, Taiwan, pp. 433-438.
Wang, Y, Zhu, JG & Guo, YG 1970, 'A survey of direct torque control schemes for permanent magnet synchronous motor drives', 2007 Australasian Universities Power Engineering Conference, 2007 Australasian Universities Power Engineering Conference (AUPEC), IEEE, Perth, Australia, pp. 229-234.
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Wang, Y, Zhu, JG & Guo, YG 1970, 'A survey of direct torque control schemes for permanent magnet synchronous motor drives', 2007 AUSTRALASIAN UNIVERSITIES POWER ENGINEERING, VOLS 1-2, Australasian Universities Power Engineering Conference (AUPEC), IEEE, Curtin Univ Technol, Perth, AUSTRALIA, pp. 162-166.
Weily, AR & Guo, YJ 1970, 'An aperture coupled patch antenna system with MEMS-based reconfigurable polarization', 2007 International Symposium on Communications and Information Technologies, 2007 International Symposium on Communications and Information Technologies, IEEE, pp. 325-328.
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An aperture coupled patch antenna suitable for IEEE 802.11b/g WLAN applications is described. The antenna system enables the polarization of the device to be dynamically reconfigured, where the reconfiguration is actuated by an RF microelectromechanical system (MEMS) single-pole double-throw (SPDT) switch. An equivalent circuit model of the RF MEMS switch is used In the electromagnetic simulations of the antenna. This enables an accurate analysis of the antenna cross-polarization, which is highly dependent on the switch isolation. Theoretical results are given for the return loss, radiation patterns and gain of the antenna In both vertical and horizontal polarization states. © 2007 IEEE.
Wu, Q, Wang, L, Geng, X, Li, M & He, S 1970, 'Dynamic Biometrics Fusion at Feature Level for Video-Based Human Recognition', Proceedings of Image and Vision Computing New Zealand 2007, Image and Vision Computing Conference, Image and Vision Computing New Zealand, Hamilton, New Zealand, pp. 152-157.
Xianyi Rui, Ronghong, Junping Geng & Xiaojing Huang 1970, 'The largest eigenvalue characteristic of correlated complex wishart matrices and its application to MIMO MRC systems', 2007 International Symposium on Communications and Information Technologies, 2007 International Symposium on Communications and Information Technologies, IEEE, Sydney, Australia, pp. 375-379.
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In this paper, we analyze statistical properties of the largest eigenvalue of correlated complex Wishart matrices. The results provide an analytical tool for the study of multipleinput multiple-output (MIMO) maximal ratio combining (MRC) systems in the presence of spatial fading correlation at the transmitter or receiver. Based on them, the exact closed-form expressions for the cumulative distribution function and the probability density function of the output signal-to-noise ratio are presented. The analytical results are validated by Monte Carlo simulations. © 2007 IEEE.
Xiaojing Huang 1970, 'Diversity performance of precoded OFDM with MMSE equalization', 2007 International Symposium on Communications and Information Technologies, 2007 International Symposium on Communications and Information Technologies, IEEE, Sydney, AUSTRALIA, pp. 802-807.
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Xiaojing Huang & Leong Keong Kwoh 1970, '3D building reconstruction and visualization for single high resolution satellite image', 2007 IEEE International Geoscience and Remote Sensing Symposium, 2007 IEEE International Geoscience and Remote Sensing Symposium, IEEE, Barcelona, SPAIN, pp. 5009-5012.
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Xu, J, Ye, G & Zhang, J 1970, 'Long-term Trajectory Extraction for Moving Vehicles', 2007 IEEE 9th Workshop on Multimedia Signal Processing, 2007 IEEE 9th Workshop on Multimedia Signal Processing, IEEE, Chania, GREECE, pp. 223-226.
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Xu, M, Luo, S & Jin, J 1970, 'Video Adaptation based on Affective Content with MPEG-21 DIA Framework', 2007 IEEE Symposium on Computational Intelligence in Image and Signal Processing, 2007 IEEE Symposium on Computational Intelligence in Image and Signal Processing, IEEE, pp. 386-390.
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We present a video adaptation system which takes account of users' preference on video Affective Content (AC) and limited network resource. AC directly causes an user's attention, evaluation and memory which also provides feasible entry for video highlight. According to user's preference, the proposed adaptation insures the video parcels with AC are allocated as much as possible network resource. The system is implemented with MPEG-21 Digital Item Adaptation (DIA) framework which provides a generic video adaptation solution for all video formats and various usage environments by manipulating on XML files. XML file based adaptation avoids complex video computation. 30 students from various departments were invited to test the system and their responses were positive. © 2007 IEEE.
Yan, Y, Zhu, J & Guo, Y 1970, 'A Direct Torque Controlled Surface Mounted PMSM Drive with Initial Rotor Position Estimation Based on Structural and Saturation Saliencies', 2007 IEEE Industry Applications Annual Meeting, 2007 IEEE Industry Applications Annual Meeting, IEEE.
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Yan, Y, Zhu, J & Guo, Y 1970, 'A Direct Torque Controlled Surface Mounted PMSM Drive with Initial Rotor Position Estimation Based on Structural and Saturation Saliencies', 2007 IEEE Industry Applications Annual Meeting, 2007 IEEE Industry Applications Annual Meeting, IEEE, New Orleans, USA, pp. 683-689.
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For a practical direct torque controlled (DTC) permanent magnet synchronous motor (PMSM) drive system, the information of the initial rotor position, which is usually obtained by a mechanical position sensor, is essential for starting under the full load. In order to avoid the disadvantages of using mechanical position sensors, great efforts have been made on the development of sensorless control schemes. This paper presents an initial rotor position estimation scheme for a DTC PMSM drive based on a nonlinear model of PMSM incorporating both structural and saturation saliencies. Firstly, the performance of the estimation scheme is simulated within Matlab/Simulink environment. Based on the simulation results, the estimation scheme has been investigated. Experiments have also been carried out to identify the initial rotor position of a surface mounted PMSM (SPMSM). In the experiment, specially designed high voltage pulses are applied to amplify the saturation saliencies. The peak currents corresponding to the voltage pulses are used, in combination with the inductance patterns, to determine the d-axis position and the polarity of the rotor. Finally, the presented initial rotor position identification strategy has been implemented in a sensorless DTC drive for an SPMSM. Experiments are conducted to confirm the effectiveness of the method and the performance of the drive system.
Yang, J & Zhang, J 1970, 'Offline Swimmer Cap Tracking Using Trajectory Interpolation', 9th Biennial Conference of the Australian Pattern Recognition Society on Digital Image Computing Techniques and Applications (DICTA 2007), 9th Biennial Conference of the Australian Pattern Recognition Society on Digital Image Computing Techniques and Applications (DICTA 2007), IEEE, pp. 579-585.
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In this paper, we present a preliminary attempt to solve the difficult problem of tracking swimmer cap in swimming videos to facilitate swimmer performance assessment. Due to the great challenges posed by moving camera and severe figure-background occlusions, an offline approach based on trajectory interpolation is adopted. Firstly, each frame is searched for hypothesized positions of the target cap using mean shift mode seeking. Secondly, most outliers due to ambiguities and noise are eliminated using lane constraints, and the hypothesis in the space-time volume are clustered into trajectory segments based on a spatial and temporal closeness criteria. Finally, cubic spline trajectory interpolation is used to infer the target cap position in occluded frames. Experiments show that satisfying tracking results are achieved by our approach. © 2007 IEEE.
Yang, L, Guo, B & Ni, W 1970, 'Multifocus Image Fusion Algorithm Based on Contourlet Decomposition and Region Statistics', Fourth International Conference on Image and Graphics (ICIG 2007), Fourth International Conference on Image and Graphics (ICIG 2007), IEEE, PEOPLES R CHINA, Sichuan Univ, Chengdu, pp. 707-+.
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Yiping Dou, Youguang Guo & Jianguo Zhu 1970, 'Investigation of motor topologies for SMC application', 2007 International Conference on Electrical Machines and Systems (ICEMS), 2007 International Conference on Electrical Machines and Systems, IEEE.
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Yoshizawa, S & Miyanaga, Y 1970, 'Use of a Variable Wordlength Technique in an OFDM Receiver to Reduce Energy Dissipation', 2007 IEEE International Symposium on Circuits and Systems (ISCAS), 2007 IEEE International Symposium on Circuits and Systems (ISCAS), IEEE.
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Yousef, B, Hoang, DB & Rogers, G 1970, 'Network programmability for VPN overlay construction and bandwidth management', ACTIVE NETWORKS, IFIP International Working Conference, Springer, Kansas, USA, pp. 114-125.
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Reliability and security concerns have increased demand for Virtual Private Networks (VPNs). Ideally, a VPN service should offer autonomous overlay networks with guaranteed bandwidth allocations over a shared network. Network providers seek an automated VPN creation and management process, while users of a VPN would greatly benefit from secure control over the handling of their traffic. Currently, network infrastructure does not support such partitioning services and, due to its static nature, it cannot be adapted to meet such new demands. Active and Programmable Network research has developed a number of adaptable architectures. However, its current focus is on theoretical service deployment rather than on applicability to large and shared networking environments. This paper presents the application of a new programmable architecture to enable on-demand VPN construction, bandwidth management, and secure autonomous VPN control onto shared commercial infrastructure.
Yu, K & Guo, YJ 1970, 'Efficient Location Estimators in NLOS Environments', 2007 IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications, 2007 IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications, IEEE.
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In the paper we consider location estimation in an non-line-of-sight (NLOS) environment. A constrained optimization based location algorithm is proposed to jointly estimate the unknown location and bias by using the sequential quadratic programming (SQP) algorithm. This method does not rely on any prior statistics information, and simulation results show that the proposed method outperforms the existing related methods considerably. To reduce the complexity of the SQP based algorithm, we further propose a Taylor-series expansion based linear quadratic programming (TS-LQP) algorithm. Simulation results demonstrate that the computational complexity of the TS-LQP algorithm is only a fraction of that of the SQP algorithm while the accuracy loss is marginal. © 2007 IEEE.
Yu, K & Guo, YJ 1970, 'NLOS Error Mitigation for Mobile Location Estimation in Wireless Networks', 2007 IEEE 65th Vehicular Technology Conference - VTC2007-Spring, 2007 IEEE 65th Vehicular Technology Conference, IEEE, pp. 1071-1075.
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Most radio positioning methods are based on the measurements of distance between different wireless nodes. Owing to the existence of non-line-of-sight (NLOS) radio propagation, unfortunately, not all the measured distances are reliable. One way to tackle the problem of positioning is therefore to take two-steps: (i) identifying the NLOS measurements; (ii) smart signal processing of the mixed LOS and NLOS measurements. This paper is focused on the second issue. Under the assumption that the NLOS measurements have been identified, we first propose a simple method to suppress the effect of the NLOS error. Simulation results demonstrate that the proposed method achieves similar or better accuracy than several other known methods and the computational complexity is reduced considerably. We also present an optimal location estimator under the assumption of Gaussian distributed measurement noise and Rayleigh distributed NLOS error. Although it is difficult to achieve the optimal performance in practice due to modeling uncertainties, the optimal estimator provides a performance benchmark. © 2007 IEEE.
Yuedong Zhan, Jianguo Zhu, Youguang Guo & Hua Wang 1970, 'Design of an active power factor converter for ups with backup proton exchange membrane fuel cell/battery', 2007 Australasian Universities Power Engineering Conference, 2007 Australasian Universities Power Engineering Conference (AUPEC), IEEE, Perth, Australia, pp. 435-440.
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Yuedong Zhan, Jianguo Zhu, Youguang Guo & Hua Wang 1970, 'Development of a single-phase high frequency UPS with backup PEM fuel cell and battery', 2007 International Conference on Electrical Machines and Systems (ICEMS), 2007 International Conference on Electrical Machines and Systems, IEEE.
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Zhan, Y, Zhu, J, Gu, Y & Wang, H 1970, 'Design of an active power factor converter for UPS with backup proton exchange membrane fuel cell/battery', 2007 AUSTRALASIAN UNIVERSITIES POWER ENGINEERING, VOLS 1-2, Australasian Universities Power Engineering Conference (AUPEC), IEEE, Curtin Univ Technol, Perth, AUSTRALIA, pp. 316-+.
Zhan, Y, Zhu, J, Guo, Y & Jin, J 1970, 'Control of proton exchange membrane fuel cell based on fuzzy logic', PROCEEDINGS OF THE 26TH CHINESE CONTROL CONFERENCE, VOL 4, 26th Chinese Control Conference, BEIJING UNIV AERONAUTICS & ASTRONAUTICS PRESS, Zhangjiajie, PEOPLES R CHINA, pp. 345-349.
Zhan, Y, Zhu, J, Guo, Y & Wang, H 1970, 'A PEMFC/battery hybrid UPS system for backup and emergency power applications', 2007 INTERNATIONAL CONFERENCE ON POWER ELECTRONICS AND DRIVE SYSTEMS, VOLS 1-4, 7th International Conference on Power Electronics and Drive Systems (PEDS 2007), IEEE, Bangkok, THAILAND, pp. 1662-+.
Zhan, Y, Zhu, J, Guo, Y & Wang, H 1970, 'A PEMFC/Battery Hybrid UPS System for Backup and Emergency Power Applications', 2007 7th International Conference on Power Electronics and Drive Systems, 2007 7th International Conference on Power Electronics and Drive Systems, IEEE, Bangkok, Thailand, pp. 1513-1517.
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This paper presents the development of a proton exchange membrane fuel cell (PEMFC) and battery hybrid uninterruptible power system (UPS) for backup and emergency power applications. A sixty-cell PEMFC stack is employed as the main power source at normal load and a 3-cell lead-acid battery is employed as the auxiliary power of the UPS at overload or during the PEMFC startup. The PEMFC consists of two valves for the hydrogen input and output respectively, a mass flow controller to adjust the hydrogen mass flow, and a pressure sensor to control the hydrogen pressure, and their control units for the management of the whole system. The design procedures of the UPS hybrid system are discussed. Experimental setups are presented and the experimental results verify the performances of the PEMFC/battery hybrid power source and the UPS system under the condition of computer load. The developed UPS system proves to be a cost-effective solution for backup and emergency power applications.
Zhan, Y, Zhu, J, Guo, Y & Wang, H 1970, 'Development of a single-phase high frequency UPS with backup PEM fuel cell and battery', Proceeding of International Conference on Electrical Machines and Systems, ICEMS 2007, International Conference on Electrical Machines and Systems, IEEE, Seoul, Korea, pp. 1840-1844.
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This paper presents a 300 W single-phase high frequency uninterrupted power supply (UPS) with backup proton exchange membrane fuel cell (PEMFC) and battery, DC/AC inverter, DC/DC converter, AC/DC rectifier, and AC/DC recharger. The principle and structure of the PEMFC/battery hybrid UPS system are introduced and discussed. Key practical techniques of the design are presented, including the design of the PEMFC generating system, the control technique of the AC/DC rectifier, AC/DC recharger, DC/AC inverter and DC/DC converter based on a microcomputer MC68HC11K4 and other integrated circuit chips. Experimental results show that during the switching process from battery to PEMFC, and vice versa, the UPS can provide an uninterrupted alternate voltage for the load, with low cost, low weight, small volume and size, great reliability and maintainability.
Zhang, Z & Piccardi, M 1970, 'A review of tracking methods under occlusions', Proceedings of IAPR Conference on Machine Vision Applications, MVA 2007, Machine Vision Applications, Institute of Industrial Science, The University of Tokyo, Tokyo, Japan, pp. 146-149.
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Object tracking in computer vision refers to the task of tracking individual moving objects accurately from one frame to another in an image sequence. Several tracking methods have been proposed in the recent literature capable of coping with a certain degree of occlusions of the objects. However, no comparative analysis of such methods has been presented to date and both the expert and the newcomer to this area may be confused about the relative effectiveness of each method when compared under the same level of complexity of the dynamic scene. In order to fulfill this need, this paper proposes a set of analysis criteria and provides a comparative review of the main recent tracking methods, in particular with respect to their capability of tracking objects under occlusions.
Zhe Ren, Xu Fang, Shuhong Wang, Jie Qiu, Jian Guo Zhu, Youguang Guo, Xiaofeng Yang, Ha, JH, Zhenyu Wang, Yingke Sun & Jiunan Zhang 1970, 'Design Optimization of an Interior-type Permanent Magnet BLDC Motor using PSO and Improved MEC', 2007 International Conference on Electrical Machines and Systems (ICEMS), 2007 International Conference on Electrical Machines and Systems, IEEE.
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Zheng, L, He, S, Wu, Q & Hintz, TB 1970, 'Number Plate Recognition without Segmentation', Proceedings of Image and Vision Computing New Zealand 2007, Image and Vision Computing Conference, Image and Vision Computing New Zealand, Hamilton, New Zealand, pp. 164-168.
Zhou, S, Liu, R, Everitt, D & Zic, J 1970, 'A<sup>2</sup>-MAC: an application adaptive medium access control protocol for data collections in wireless sensor networks', 2007 International Symposium on Communications and Information Technologies, 2007 International Symposium on Communications and Information Technologies, IEEE, Sydney, AUSTRALIA, pp. 1131-1136.
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Zhu, J, Guo, Y, Lin, Z & Huang, Y 1970, 'Advanced SMC Motors and Drive Techniques', Proceedings of 2nd International Forum on Systems and Mechatronics, International Forum on Systems and Mechatronics, organisers of the International Forum on Systems and Mechatronics, Tainan, Taiwan, pp. 1-7.
Zhu, Y, Lee, J & Seshia, A 1970, 'MEMS Electrometer System Simulation using a Time-Domain Variable Capacitor Model', TRANSDUCERS 2007 - 2007 International Solid-State Sensors, Actuators and Microsystems Conference, TRANSDUCERS 2007 - 2007 International Solid-State Sensors, Actuators and Microsystems Conference, IEEE.
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