Burnett, IS & Holbeche, RJ 1993, 'A mixed prototype waveform/CELP coder for sub 3 kbit/s', IEEE International Conference on Acoustics Speech and Signal Processing, vol. 2, pp. 175-178.
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Guo, YJ & Barton, SK 1993, 'Fresnel zone plate reflector incorporating rings', IEEE Microwave and Guided Wave Letters, vol. 3, no. 11, pp. 417-419.
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A novel high-efficiency Fresnel zone plate reflector antenna is presented. The reflector consists of an inhomogeneous array of circular conducting rings printed on a grounded substrate. By adjusting the geometrical parameters of the rings and the distances between them, the reflector provides a space-varying phase correction required for focusing an incoming plane wave. Compared with a phase reversal zone plate, an average of 3-dB gain improvement and significant sidelobe reduction have been obtained. © 1993 IEEE
Guo, YJ & Barton, SK 1993, 'Multilayer phase correcting fresnel zone plate reflector antennas', International Journal of Satellite Communications, vol. 11, no. 2, pp. 75-80.
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AbstractOwing to its flat nature and light weight etc., the Fresnel zone plate antenna is becoming very attractive for such applications as DBS reception and receive‐only VSAT. The disadvantages of low efficiency and high sidelobes of the simple and the phase reversing zone plates can be improved by using phase correcting techniques. In this paper, a systematic investigation on the efficiency and sidelobe performance of subzone phase correcting zone plate antennas is presented. The design of a form of multilayer phase correcting zone plate reflector is described. A quarter‐wave zone plate reflector constructed with three dielectric layers and metallized rings is reported, with measured peak efficiency of 55 per cent.
Guo, YJ & Barton, SK 1993, 'On the subzone phase correction of fresnel zone plate antennas', Microwave and Optical Technology Letters, vol. 6, no. 15, pp. 840-843.
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AbstractSubzone phase correction is a practical technique to produce high‐efficiency Fresnel zone plate antennas. In this article a strict theory underlying the technique is presented. A closed‐form expression of the focal field for the subzone phase correcting Fresnel zone plate (FZP) illuminated by a plane wave is given first. The subzone division and the corresponding phase correction are then optimized to produce the maximum focal field intensity. To overcome the difficulty of placing many subzone phase shifters in the narrow outer full‐wave zones, an aperiodic subzone phase correction technique is proposed.
Maciel, FB, Miyanaga, Y & Tochinai, K 1993, 'An optimization technique for lowering the iteration bound of DSP programs', Journal of VLSI signal processing systems for signal, image and video technology, vol. 5, no. 2-3, pp. 273-282.
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Miyanaga, Y, Tochinai, K & Okumura, S 1993, 'On the generalizability and adaptability of a self‐organization clustering', Electronics and Communications in Japan (Part III: Fundamental Electronic Science), vol. 76, no. 3, pp. 73-82.
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AbstractThis paper constructs an adaptive clustering method based on the Mahalanobis distance and discusses its essential characteristics with respect to the adaptability and generalizability. From some experimental results, this method is shown to provide a sufficient adaptive clustering ability. The clustering method proposed in this paper is based on a self‐organization method by which every useful independent base can be obtained on a characteristic space. Thus, the user's effort of learning becomes minimum compared with supervised learning. In addition, clustering based on an adaptive method is performed to consider the time variation of the characteristics. Furthermore, to improve the generalizability, a set of clusters is reconstructed in every certain period and a system is constructed such that accurate cluster sets and recognition are obtained. Because this reconstruction is also processed in a self‐organizing way, it does not require learning from an external source. To evaluate the characteristics quantitatively, its effectiveness is shown by several simulation experiments.
Veitch, D 1993, 'The approach to constrained equations', Physics Letters A, vol. 183, no. 4, pp. 319-326.
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Xia, JS, Ni, W & Adams, ED 1993, 'Melting pressure of solidHe3through the magnetic-ordering transitions', Physical Review Letters, vol. 70, no. 10, pp. 1481-1484.
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ZHU, JG & RAMSDEN, VS 1993, '2-DIMENSIONAL MEASUREMENT OF MAGNETIC-FIELD AND CORE LOSS USING A SQUARE SPECIMEN TESTER', IEEE TRANSACTIONS ON MAGNETICS, vol. 29, no. 6, pp. 2995-2997.
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To improve the precision of two dimensional magnetic field measurement in a single sheet square specimen core loss measuring system, a novel sandwich arrangement of magnetic field sensing coils is proposed. The losses are calculated from the measured mag
ZHU, JG, HUI, SYR & RAMSDEN, VS 1993, 'DISCRETE MODELING OF MAGNETIC CORES INCLUDING HYSTERESIS EDDY-CURRENT AND ANOMALOUS LOSSES', IEE PROCEEDINGS-A-SCIENCE MEASUREMENT AND TECHNOLOGY, vol. 140, no. 4, pp. 317-322.
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A discrete dynamic model of a magnetic core including hysteresis, eddy current and anomalous losses is proposed. It is suitable for thin laminations and features a simple formulation and fast calculation. The calculations and measurements of an annular r
Bernasch, J 1970, '<title>Visual attention control in image sequences using multiple knowledge sources</title>', SPIE Proceedings, IS&T/SPIE's Symposium on Electronic Imaging: Science and Technology, SPIE.
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Bone, DJ 1970, '<title>Adaptive color-printer modeling using regularized linear splines</title>', Device-Independent Color Imaging and Imaging Systems Integration, IS&T/SPIE's Symposium on Electronic Imaging: Science and Technology, SPIE, pp. 104-115.
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© 1993 SPIE. All rights reserved. The characterisation of a highly non-linear color print device can involve a large number of measurements of printed color output. If the measurement process is not automated this can be a significant fraction of the cost of developing a color model for a device. One way to limit the number of measurements required is to ensure that in any given region, only enough measurements are made to adequately characterise the local behaviour. With no prior knowledge of the behaviour, this requires an adaptive approach to the sampling. An adaptive sampling technique developed for this work, termed Model Accuracy Moderated Adaptive Sampling (MAMAS), is described. Simulation tests with and without measurement noise are presented and the results are compared to measurements using uniform regular sampling. The technique is also applied to a real printer, the Canon CLC500, for which some results are presented. The color model used for the print device is based on an interpolated look up table (ILUT). Because of the highly non-linear nature of the device being modeled a flexible technique is required to translate the irregular measurement samples into a regularly gridded model. A method based on a regularized linear spline was developed. Appropriate choice of the penalty function for the regularization can achieve a compromise between fitting the measured points and reducing the impact of measurement noise. A brief overview of the technique is presented.
Bone, DJ 1970, '<title>Adaptive multidimensional interpolation using regularized linear splines</title>', SPIE Proceedings, IS&T/SPIE's Symposium on Electronic Imaging: Science and Technology, SPIE, SAN JOSE, CA, pp. 243-253.
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Brookes, W & Indulska, J 1970, 'An ODP-based approach to overcoming heterogeneity in wide area networks', Proceedings of IEEE Singapore International Conference on Networks/International Conference on Information Engineering '93, IEEE Singapore International Conference on Networks/International Conference on Information Engineering '93, IEEE, SINGAPORE, SINGAPORE, pp. 680-684.
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Chee, YJ & Berton, SK 1970, 'High efficiency zone plate reflector incorporating printed resonators', IEE Conference Publication, 8TH INTERNATIONAL CONF ON ANTENNAS AND PROPAGATION, INST ELECTRICAL ENGINEERS, HERIOT WATT UNIV, EDINBURGH, SCOTLAND, pp. 620-622.
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A novel phase correcting zone plate reflector with a single layer metallic printing is presented. By using reflective phase shifters consisting of printed resonators, the new reflector antenna achieved 65% aperture phase efficiency. Compared with the conventional phase reversing zone plate reflector, an average of 2dB gain increase and a IIdB sidelobe reduction have been obtained in the operating band. The new reflector showed much narrower main beam.
Fedaoui, L, Gay, V & Horlait, E 1970, 'QoS management of ODP-based distributed multimedia applications', Proceedings ISAD 93: International Symposium on Autonomous Decentralized Systems, ISAD 93: International Symposium on Autonomous Decentralized Systems, IEE Comput. Soc. Press, pp. 239-245.
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© 1993 IEEE. The objective of this study is to try to answer the question of how to manage quality of service (QoS) in open-distributed processing (ODP)-based distributed multimedia applications. To reach this goal, an overview of the basic characteristics of distributed multimedia applications is given. Their QoS constraints are then specified in the ODP framework of abstraction. The role and the position of QoS management in ODP are shown by a joint editing sample.
Guo, Y & Yang, J 1970, 'Application of Sinusoidal Windings in Synchronous Machines', Proceedings of Hubei Electrotechnical Society Annual Meeting (Hubei Dianguo Jishu Xiehui Nianhui), Hubei Electrotechnical Society, Yichang, China, pp. 1-6.
Piccardi, M, De Stefano, L, Cucchiara, R & Cinotti, TS 1970, 'Processing of variable size images on a cellular array: Performance analysis with the Abingdon Cross Benchmark', Proceedings of International Conference on Application Specific Array Processors (ASAP '93), International Conference on Application Specific Array Processors (ASAP '93), IEEE Comput. Soc. Press, pp. 172-175.
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© 1993 IEEE. Handling a continuous flow of variable size images is a requirement for real time computer vision machines. A modular system based on a small size SIMD cellular array of 1-bit processing elements has been developed with this goal in mind and it is now evaluated against the Abingdon Cross Benchmark specifications. The benchmark tests the combination of algorithms and architecture and generates a quality factor expressed as the ratio of the image lateral size and the processing time. The examined machine supports an efficient means to automatically partition, process and reconstruct images larger than the array size. The authors briefly describe the system, discuss the selected algorithms and present performance results and estimates for several system configurations.
Tuan, HD 1970, 'Local controllability problems for implicit discrete inclusions with state constraints', Proceedings of 32nd IEEE Conference on Decision and Control, 32nd IEEE Conference on Decision and Control, IEEE, SAN ANTONIO, TX, pp. 3317-3318.
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Veitch, D 1970, 'Novel models of broadband traffic', IEEE Global Telecommunications Conference, IEEE, pp. 1057-1061.
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We provide models which are capable of describing the long term correlations and self similar burstiness structure found in recent measurements of packet networks and VBR video. Two families of `fractal' arrival processes are presented which capture these features extremely compactly. We show the equivalence of one of these to processes with unsummable auto-correlation functions used recently to describe long term correlation and burstiness. Our approach however has advantages. The other (1 parameter) family generates burstiness on all time scales. It shows how blocking can occur even for arrival streams with zero arrival rate. This illustrates how parameters describing scaling of burstiness and correlation must replace useless long terms averages.
ZHU, JG, HUI, SYR, RAMSDEN, VS & IEEE 1970, 'A DYNAMIC EQUIVALENT-CIRCUIT MODEL FOR SOLID MAGNETIC CORES', PESC 93 RECORD - 24TH ANNUAL IEEE POWER ELECTRONICS SPECIALISTS CONFERENCE, 24th Annual IEEE Power Electronics Specialists Conference, I E E E, UNIV WASHINGTON, COLL ENGN, SEATTLE, WA, pp. 1111-1115.
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