Aubrey, T & White, P 1992, 'Simple numerical integration of logarithmic singularities in moment method solutions of electromagnetic problems', Electronics Letters, vol. 28, no. 16, pp. 1519-1519.
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Moment method solutions to electromagnetic problems can require the integration of functions containing logarithmic singularities. A simple technique for the numerical integration of these singularities is presented. The technique is applied in the calculation of the self-impedance of a surface dipole. The convergence of the solution using this method is compared to the convergence of existing methods. © 1992, The Institution of Electrical Engineers. All rights reserved.
Baweja, D, Munn, RL, Roper, H & Sirivivatnanon, V 1992, 'Situ assessments of long-term performance of plain and blended cement concretes', Transactions of the Institution of Engineers, Australia. Civil engineering, vol. CE34, no. 2, pp. 115-127.
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Between 1987 and 1990, selected elements from ten individual structures from within four facilities were examined to assess the long-term performance of concretes used. Structural members examined encompassed slabs on grade, suspended slabs and wharf elements. Individual concretes forming the selected structures had binders of normal portland cement, portland cement with fly ash or ternary systems of fly ash, ground granulated blast furnace slag and portland cement. Slag aggregates were used in certain of the concretes. Interest focused on the long-term in-service durability of the concretes. Conclusions were drawn with respect to the performance of the concretes.
Bird, TS & Sroka, C 1992, 'Design of the KU-band antennas for the Galaxy HS601C satellites', Journal of Electrical and Electronics Engineering, Australia, vol. 12, no. 3, pp. 267-273.
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Outcomes of a study undertaken by CSIRO on the six possible shaped beams for the Galaxy HS601C satellites are described. These satellites will provide C- and Ku-band communications to continental USA and neighbouring islands. Of especial concern in the study was the effect on performance of mutual coupling between the multi-mode horns in the feed arrays for the reflectors which generate the shaped beams. Mutual coupling influences the reflection coefficient at the horn inputs as well as the directivity of the shaped beam. After a brief description of the antenna geometry, methods used to analyse the antennas are outlined. Results are presented for possible antenna designs with and without mutual coupling in the feed array. We describe some techniques employed to optimize the array beamforming networks. Due to practical considerations it was possible to change only some of the beamforming network couplers and the impact of shaped beam design with a reduced set of couplers is discussed.
CAO, HT & SIRIVIVATNANON, V 1992, 'CORROSION OF STEEL IN CONCRETE WITH AND WITHOUT SILICA FUME - REPLY', CEMENT AND CONCRETE RESEARCH, vol. 22, no. 1, pp. 188-189.
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DHARMAPPA, H, VERINK, J, FUJIWARA, O & VIGNESWARAN, S 1992, 'Optimization of granular bed filtration treating polydispersed suspension', Water Research, vol. 26, no. 10, pp. 1307-1318.
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The need for economic optimization of a filter unit leading to its least cost design with respect to filtration velocity, run time, depth and medium size has long been identified but there are no algorithms towards this end. In this study, an algorithm incorporating a NLP (non-linear programming) software (NPSOLâSystem Optimization Laboratory, Stanford University, Calif.) and response surface methodology (RSM) is presented for optimal design and operation of a filter unit. Also, the simulation model included in the optimization takes into account the polydispersity of the influent. The optimization results obtained using laboratory data have shown that the filter design and operating parameters are highly dependent on the particle size distribution (PSD) of the influent. The cost of the filter unit with influent having the same total particles mass concentration and turbidity but with greater fraction of fine particles was about 46% higher. This demonstrates the importance of incorporating PSD instead of suspended solids (SS), turbidity units (TU) or volume average diameter in the design and operation of filter units. The proposed approach, however, is applicable only for single medium filters. Further research is warranted to extend it to dual and tri media filters.
Dharmappa, HB, Verink, J, Ben Aim, R, Yamamoto, K & Vigneswaran, S 1992, 'A comprehensive model for cross-flow filtration incorporating polydispersity of the influent', Journal of Membrane Science, vol. 65, no. 1-2, pp. 173-185.
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A semi-empirical model is presented for the prediction of foulant deposit thickness and concentration, and thereby, predicting the permeate flux in cross-flow microfiltration and ultrafiltration. The scope of the model is limited to colloidal suspensions (i.e. non-diffusive solutes) and its hallmark is its applicability to polydispersed influents. The theoretical model was verified with experimental observations and found to yield a fairly good agreement with an error less than 62% of the average flux over 100 min of filtration. However, evaluation of model coefficients a and b is necessary through laboratory studies. The model was successfully used to predict the effect of particle size distribution (PSD) on permeate flux. The simulation results corroborate the contention that the long-term flux decline is due to the reduction is foulant deposit permeability via infiltration of fines into the cake, thereby demonstrating the importance of influent particle size distribution (PSD) on foulant deposit permeability. The proposed model is a first step towards the modeling of polydispersed influents. As such there is a lot of scope for further refinements which is briefly discussed.
Esselle, KP & Stuchly, MA 1992, 'Neural stimulation with magnetic fields: analysis of induced electric fields', IEEE Transactions on Biomedical Engineering, vol. 39, no. 7, pp. 693-700.
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Esselle, KP & Stuchly, MA 1992, 'Simplified analytical solutions for magnetic stimulation of neurons', Applied Computational Electromagnetics Society Journal, vol. 7, no. 2, pp. 162-178.
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Strong pulses of magnetic field are used to stimulate peripheral nerves and motor neurons in the cerebral cortex. Such stimulation is used in neurology for numerous diagnostic purposes. The electric field induced in tissue along the neuron and its spatial derivative are the parameters determining neural response. Another important parameter influencing the efficiency of stimulation is the inductance of a coil producing the magnetic field, as it defines the current time derivative for a given pulse generator. For arbitrarily located coils of arbitrary shapes, a semi-analytical solution is presented to calculate spatial distributions of the electric field and its spatial derivatives in a semi-infinite tissue model. Analytical solutions are given for coils composed of linear segments parallel or perpendicular to the air-tissue interface. Expressions for inductance of coils having suitable geometries for neural stimulation are derived. Coils can be optimized for stimulation of nerves at given orientation and distance from the air-tissue interface. In the optimization, coil dimensions and shape are considered as they affect both the induced field and inductance. A quadruple coil consisting of triangular sections appears to offer some advantages over other shapes for stimulation of shallow nerves. For deep nerves spaced quadruple square and three-dimensional coils are preferred.
Guang-Quan, Z 1992, 'Fuzzy limit theory of fuzzy complex numbers', Fuzzy Sets and Systems, vol. 46, no. 2, pp. 227-235.
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We introduce three important concepts of fuzzy complex numbers, fuzzy distance and fuzzy limit of fuzzy complex numbers, and give some elementary properties of the fuzzy complex numbers and fuzzy distance and fuzzy limit of the fuzzy complex numbers. We also discuss some important theorems of fuzzy complex numbers: nested closed rectangles theorem, Cauchy's criterion for convergence, accumulation principle, etc. © 1992.
Guang-Quan, Z 1992, 'Fuzzy number-valued fuzzy measure and fuzzy number-valued fuzzy integral on the fuzzy set', Fuzzy Sets and Systems, vol. 49, no. 3, pp. 357-376.
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Guang-Quan, Z 1992, 'On fuzzy number-valued fuzzy measures defined by fuzzy number-valued fuzzy integrals I', Fuzzy Sets and Systems, vol. 45, no. 2, pp. 227-237.
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Guang-Quan, Z 1992, 'On fuzzy number-valued fuzzy measures defined by fuzzy number-valued fuzzy integrals II', Fuzzy Sets and Systems, vol. 48, no. 2, pp. 257-265.
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Guang-Quan, Z 1992, 'The structural characteristics of the fuzzy number-valued fuzzy measure on the fuzzy σ-algebra and their applications', Fuzzy Sets and Systems, vol. 52, no. 1, pp. 69-81.
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In this paper, some structural characteristics of the fuzzy number-valued fuzzy measure on the fuzzy σ-algebra are discussed. On the fuzzy number-valued fuzzy measure space, the concepts of 'almost' and 'pseudo-almost' are introduced, and Riesz's theorem, Lebesgue's theorem and Egoroff's theorem for sequences of fuzzy measurable functions and some convergence theorems for sequences of fuzzy number-valued fuzzy integrals on fuzzy sets are proved by some structural characteristics of the fuzzy number-valued fuzzy measure. © 1992.
Guo, YJ & Barton, SK 1992, 'A high-efficiency quarter-wave zone plate reflector', IEEE Microwave and Guided Wave Letters, vol. 2, no. 12, pp. 470-471.
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A multilayered quarter-wave zone plate reflector antenna operating in the microwave range is presented. The theory for designing the reflector and experimental results are given. An efficiency of 55% was obtained with a prototype reflector antenna. © 1992 IEEE
HADGRAFT, R & WIGAN, M 1992, 'On-the-job Training for Engineers Using Hypertext', European Journal of Engineering Education, vol. 17, no. 2, pp. 159-165.
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There is a pressing need for more efficient methods of delivering updated engineering information, especially in the workplace. Hypertext offers the author the ability to structure information in ways which are more flexible than conventional print media. The intention of presenting training material using hypertext is to develop an explorative attitude in the reader. The reader is encouraged to follow his/her own path through the material, with the option of following some topics to a greater depth than would normally be expected. Hypertext also provides a tightly integrated package of information, guidance, and often also the ability to execute programs or procedures described in the document. It can also provide concise support for experts as well as assistance—in the same document. This paper (i) outlines the concepts and facilities in typical hypertext implementations, (ii) describes the reactions that have been obtained in the use of an on-line code of practice (Australian Rainfall and Runoff), and (iii) offers some guidelines for structuring engineering documents for hypertext. © 1992, Taylor & Francis Group, LLC. All rights reserved.
HADGRAFT, RG 1992, 'Experiences of Two Problem-oriented Courses in Civil Engineering', European Journal of Engineering Education, vol. 17, no. 4, pp. 345-353.
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Current engineering courses are not structured to develop real problem-solving skills in their students. They rely on a bottom-up approach to learning, where the first three years is spend mostly on theory, with almost no practice at problem definition. Instead, the students spend most of their time solving carefully designed exercises. Real-world problems are not as neatly packaged as these exercises, and, as a consequence, graduate engineers often lack the problem-definition and problem-recognition skills that are essential if the theory they have learned is to be useful to them. On the contrary, a problem-oriented course requires the students to develop those problem recognition skills. It also is intended to develop student-directed learning, and group and communication skills. A problem-oriented approach was used in 1991 in two second-year courses in civil engineering—surveying and computing. The courses were well received by the students, and the average exam result for surveying showed a noticeable improvement, while the average exam result for computing showed a marginal improvement. (There were, however, other encouraging signs in the computing course. The author believes that the difference in response between the two subjects is due to the difference between working in groups and working individually, and a course change for the computing subject for 1992 is proposed. © 1992, Taylor & Francis Group, LLC. All rights reserved.
Indraratna, B & Nutalaya, P 1992, 'Reinforcement of planar discontinuities in elastic rock', Geotechnical and Geological Engineering, vol. 10, no. 2, pp. 135-140.
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Indraratna, B, Balasubramaniam, AS & Balachandran, S 1992, 'Performance of Test Embankment Constructed to Failure on Soft Marine Clay', Journal of Geotechnical Engineering, vol. 118, no. 1, pp. 12-33.
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Indraratna, B, Balasubramaniam, AS, Phamvan, P & Wong, YK 1992, 'Development of negative skin friction on driven piles in soft Bangkok clay', Canadian Geotechnical Journal, vol. 29, no. 3, pp. 393-404.
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This paper describes the results of short-term pullout tests and long-term full-scale measurements of negative skin friction on driven piles in Bangkok subsoils. Two instrumented cylindrical (hollow) prestressed concrete piles were fully equipped with two independent load-measurement systems, load cells, and telltale rods. Pore pressures and ground movements in the vicinity of the piles were monitored throughout the period of investigation. The effect of bitumen coating on negative skin friction was also studied. The long-term behaviour of driven piles was compared with the estimated values obtained from short-term pullout tests and soil strength data. It was found that the negative skin friction can be predicted well by the effective stress approach using values of β between 0.1 and 0.2. The load–settlement and load–transfer behaviour were numerically modelled to acquire a more comprehensive understanding of negative skin friction developed on driven piles. A settlement-controlled concept is also introduced for piles subjected to negative skin friction, on the basis of these findings. Key words : consolidation, downdrag, driven pile, embankment, finite elements, pore pressures, pullout, settlements, soft clay.
James, M & Hoang, D 1992, 'Design of low-cost, real-time simulation systems for large neural networks', Journal of Parallel and Distributed Computing, vol. 14, no. 3, pp. 221-235.
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Systems with large amounts of computing power and storage are required to simulate very large neural networks capable of tackling complex control problems and real-time emulation of the human sensory, language, and reasoning systems. General-purpose parallel computers do not have communications, processor, and memory architectures optimized for neural computation and so cannot perform such simulations at reasonable cost. This paper analyzes several software and hardware strategies to make feasible the simulation of large neural networks in real-time and presents a particular multicomputer design able to implement these strategies. An important design goal is that the system must not sacrifice computational flexibility for speed as new information about the workings of the brain and new artificial neural network architectures and learning algorithms are continually emerging. © 1992.
LEYDEKKERS, P & TEUNISSEN, B 1992, 'SYNCHRONIZATION OF MULTIMEDIA DATA STREAMS IN OPEN DISTRIBUTED ENVIRONMENTS', LECTURE NOTES IN COMPUTER SCIENCE, vol. 614, pp. 94-104.
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This paper presents a study of synchronization mechanisms for real-time video, audio and text data streams. Synchronization is an important and complex issue when multimedia information, stored at geographically distributed locations, has to be transport
LOGANATHAN, P, HEDLEY, MJ & CLARK, SA 1992, 'THE MANUFACTURE AND EVALUATION OF GRANULAR POTASSIUM-CHLORIDE FERTILIZERS', FERTILIZER RESEARCH, vol. 31, no. 3, pp. 291-304.
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A finely divided red potassium chloride (KCl) (particle size distribution: 79% <0.5 mm, 20% 1-0.5 mm and 1% 1-2 mm) was granulated by adding eight readily available and relatively inexpensive binders using a rotating drum in the laboratory. The binders used were: urea, pulp and paper waste liquor containing lignosulphonate, urea + pulp and paper waste liquor, Borrebond powder (a commercial product containing lignosulphonate), urea + formaldehyde, ammonium sulphate, ammonium sulphate + pulp and paper waste liquor and a waste liquor containing ammonium sulphate from a Ferritin production plant. Of these, except for urea and urea + pulp and paper waste liquor which produced KCl granules having low critical relative humidity at 30°C (CRH) (<55%) and Borrebond which produced KCl granules of low crushing strength (1.1 kg for 2-3 mm granules) the other five binders produced granules with good size distributions, high crushing strengths (2.0-2.5 kg for 2-3 mm granules), CRH (65-70%) and suitable nutrient contents (K, 46-50%, Cl, 42-47%). These values are very close to those of the standard chipped KCl (crushing strength, 2.5 kg; CRH, 65-70%; K, 50%; Cl, 47%). Crushed chipped KCl (74% <1 mm, 25% 1-2 mm, 1% 2-3 mm) when cogranulated in the pilot plant with the 5 binders found successful in the laboratory, produced granules having similar characteristics as the corresponding ones produced in the laboratory. Granules produced both in the laboratory and the pilot plant had lower abrasion resistance (higher % degradation) than chipped KCl. The abrasion resistance however markedly increased when the fines (<1.4 mm) in the granules were removed. Glasshouse trials using barley as test crop demonstrated that the agronomic values of the KCl prototype granules produced with the 5 binders were similar to chipped KCl and granules produced from the feedstock KCl and water. © 1992 Kluwer Academic Publishers.
Malan, NT, Van Der Merwe, JS, Huisman, HW, Kruger, A, Eloff, FC, Pretorius, PJ & Laubscher, PJ 1992, 'A comparison of cardiovascular reactivity of rural blacks, urban blacks and whites', Stress Medicine, vol. 8, no. 4, pp. 241-246.
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Nair, SS, Singh, R, Waldron, KJ & Vohnout, VJ 1992, 'Power system of a multi-legged walking robot', Robotics and Autonomous Systems, vol. 9, no. 3, pp. 149-163.
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The power system of a legged vehicle is considerably more complex than the one used by a conventional land vehicle because of the wide range of power demands and the coordination and stability issues due to the large number of degrees of freedom. This paper is concerned with the conceptual and physical characteristics of the power system of a rough terrain, six-legged, walking vehicle. Modelling techniques and detailed analytical and simulation models are developed for the vehicle power system consisting of the prime mover, energy storage system, mechanical drives, hydraulic actuation systems and the associated control systems. Dynamics of the various subsystem and their interactions have been studied for control and optimization purposes. Validation of the models is provided by several experiments performed on a prototype leg and the vehicle. © 1992.
Nakagaki, A, Miyanaga, Y & Tochinai, K 1992, 'Application of modified off-axis spectrum to speech recognition under noisy conditions', Electronics and Communications in Japan (Part III: Fundamental Electronic Science), vol. 75, no. 3, pp. 102-110.
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This paper introduces a peak enhancement method using an off‐axis spectrum which is used in peak picking. It also considers its advantages and problems for the application of speech recognition. An off‐axis model modified to be suitable for speech recognition is proposed. The modified off‐axis model is realized by combining a peak emphasis model and a peak repressed model. The modified off‐axis model can control the peak bandwidths and the slope of its spectrum by operating two parameters. The values of the parameters are determined adaptively to each sample by a stability test. In addition, some results of experimental speech recognition under noisy conditions are described and the efficiency of the method is discussed. Copyright © 1992 Wiley Periodicals, Inc., A Wiley Company
OLLERTON, RL & SHANNON, AG 1992, 'An extension of circular and hyperbolic functionsAn', International Journal of Mathematical Education in Science and Technology, vol. 23, no. 4, pp. 611-635.
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The ordinary circular and hyperbolic functions are extended in a natural way as functions with recurring derivatives. Many of the usual properties are maintained or enhanced and this leads to a deeper understanding of the original functions. © 1992 Taylor and Francis Ltd.
Pocock, NA, Sambrook, PN, Nguyen, T, Kelly, P, Freund, J & Eisman, JA 1992, 'Assessment of spinal and femoral bone density by Dual X-Ray absorptiometry: Comparison of lunar and hologic instruments', Journal of Bone and Mineral Research, vol. 7, no. 9, pp. 1081-1084.
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Quek, KH, Bliss, PJ & Ball, JE 1992, 'Hydrodynamics of sedimentation basin (part II)-model validation and application', Transactions of the Institution of Engineers, Australia. Civil engineering, vol. CE34, no. 1, pp. 49-56.
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The calibration and validation of a computationally efficient hydrodynamic model (Quek et al., 1991c) is presented in this paper using previously published data of velocity profiles in a rectangular flume. The hydrodynamic model is applied to study the flow field in a rectangular primary sedimentation basin. The predicted velocity profiles are compared with field measurements obtained by Heinke et al. (1977). The effects of different basin design features on the flow patterns are investigated in this paper by application of the hydrodynamic model.
Sapiano, PC, Holbeche, RJ, Burnett, IS & Pulley, DR 1992, 'Modulation recognition by neural network techniques', Proceedings of IEEE Int. Symp. on Communications.
STEWART, MG 1992, 'A HUMAN RELIABILITY ANALYSIS OF REINFORCED CONCRETE BEAM CONSTRUCTION', Civil Engineering Systems, vol. 9, no. 3, pp. 227-250.
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A significant proportion of performance failures (c.g., structural failure, cost overruns, delays) are due to human error in the construction of in-situ reinforced concrete elements. A Human Reliability Analysis (HRA) model has been developed to simulate the effect of human error on the construction of a reinforced concrete beam. The proposed HRA model incorporates the effect of (i) initial errors (i.e., before engineering inspections) and (ii) errors remaining after engineering inspections. The following typical construction tasks are considered: number and size of reinforcing bars, effective depth of steel reinforcing, beam width, and quality of concrete mix. Human performance models are described for each of these microtasks. It was found that human error leads to a significant loss of structural safety. It was also shown that engineering inspections significantly increased structural reliability, but the resulting structural reliability was still an order of magnitude lower than “nominal” estimates of structural reliability. © 1992, Taylor & Francis Group, LLC. All rights reserved.
Stewart, MG 1992, 'Modelling human error rates for human reliability analysis of a structural design task', Reliability Engineering & System Safety, vol. 36, no. 2, pp. 171-180.
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It is generally accepted that human error, particularly in design, causes a significant proportion of structural failures. It is necessary to understand the 'micro' (or single task) behaviour of human errors before the entire system can be modelled. Reported herein is a description of proposed mathematical models of error occurrence that are suitable for use in a Human Reliability Analysis (HRA). These models may be used to provide error rate information. These models are fitted to realistic error occurrence data. The data was obtained from practising professional engineers and the tasks performed were cognitive; namely, calculation, table look-up and ranking tasks. These tasks are commonly encountered in typical design calculations. It was found that error occurrence behaviour is characterised by variation of error rates between individuals and, to a lesser extent, correlation of error rates for individuals. The effect of response time and experience were also examined. A comparison of the effect on structural reliability (for a typical structural design task) for error occurrence (based on the proposed models) is also reported. © 1992.
Stuchly, MA & Esselle, KP 1992, 'Factors affecting neural stimulation with magnetic fields', Bioelectromagnetics, vol. 13, no. S1, pp. 191-204.
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Veitch, D 1992, 'Windows of stability in control chaos', IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications, vol. 39, no. 10, pp. 808-819.
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WATTERSON, PA, ZHU, JG & RAMSDEN, VS 1992, 'OPTIMIZATION OF PERMANENT-MAGNET MOTORS USING FIELD CALCULATIONS OF INCREASING PRECISION', IEEE TRANSACTIONS ON MAGNETICS, vol. 28, no. 2, pp. 1589-1592.
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An algorithm is given for the fast optimization over a constrained domain of an objective function calculated iteratively. To apply the algorithm to optimizing the efficiency of permanent magnet synchronous motors, an iterative magnetic field calculatio
YING, MS 1992, 'A NEW APPROACH FOR FUZZY TOPOLOGY .2.', FUZZY SETS AND SYSTEMS, vol. 47, no. 2, pp. 221-232.
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We introduce the concepts of interior, boundary, subspace, connected space, first- and second-countable spaces, and establish some of their properties in fuzzifying topology.
YING, MS 1992, 'COMPACTNESS, THE LOWENHEIM-SKOLEM PROPERTY AND THE DIRECT-PRODUCT OF LATTICES OF TRUTH VALUES', ZEITSCHRIFT FUR MATHEMATISCHE LOGIK UND GRUNDLAGEN DER MATHEMATIK, vol. 38, no. 5-6, pp. 521-524.
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We show that compactness is preserved by arbitrary direct products of lattices of truth values and that the Lowenheim-Skolem property is preserved by finite direct products of lattices of truth values. MSC: 03C07, 03B50.
YING, MS 1992, 'THE FUNDAMENTAL THEOREM OF ULTRAPRODUCT IN PAVELKAS LOGIC', ZEITSCHRIFT FUR MATHEMATISCHE LOGIK UND GRUNDLAGEN DER MATHEMATIK, vol. 38, no. 3, pp. 197-201.
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In [This Zeitschrift 25 (1979), 45-52, 119-134, 447-464], Pavelka systematically discussed propositional calculi with values in enriched residuated lattices and developed a general framework for approximate reasoning. In the first part of this paper we i
Zhengneng, L & Li, J 1992, 'Study on the single-peak over-load retardation effect of three-dimensional small cracks', Acta Aeronautica et Astronautica Sinica, vol. 3.
Zhou, JL 1992, 'Biosorption and desorption of humic acid by microbial biomass', Chemosphere, vol. 24, no. 11, pp. 1573-1589.
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Zhou, JL & Banks, CJ 1992, 'Humic acid removal from water by biosorptton', Environmental Technology, vol. 13, no. 8, pp. 727-737.
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Bawab, S, Kinzel, GL & Waldron, KJ 1970, 'Rectified synthesis of coupler-driven four-bar mechanisms for four-position motion generation', American Society of Mechanical Engineers, Design Engineering Division (Publication) DE, pp. 147-155.
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A rectified synthesis procedure for designing coupler-driven four-bar mechanisms to pass a moving lamina through four precision positions is developed. The procedure includes the elimination of circuit, branch and order defects. This is achieved with the aid of Roberts' linkage. The procedure has been implemented in the interactive synthesis package RECSYN.
DUCHIEN, L, GAY, V & HORLAIT, E 1970, 'DESIGN OF AN INTEGRATED X400 FILESTORE', UPPER LAYER PROTOCOLS, ARCHITECTURES AND APPLICATIONS, IFIP TC6/WG6.5 International Conference on Upper Layer Protocols, Architectures and Applications, ELSEVIER SCIENCE PUBL B V, VANCOUVER, CANADA, pp. 395-407.
DUCHIEN, L, GAY, V & HORLAIT, E 1970, 'INTEGRATION OF A MULTIMEDIA FILESTORE WITH X.400', TOWARDS A NEW WORLD IN COMPUTER COMMUNICATION, 11TH INTERNATIONAL CONF ON COMPUTER COMMUNICATION : TOWARDS A NEW WORLD IN COMPUTER COMMUNICATION, I O S PRESS, GENOA, ITALY, pp. 365-370.
DUCHIEN, L, GAY, V, HORLAIT, E & MACHINERY, AC 1970, 'X.400-BASED DISTRIBUTED APPLICATION DESIGN METHODOLOGY', 1992 ACM COMPUTER SCIENCE CONFERENCE, PROCEEDINGS, 20TH ANNUAL COMPUTER SCIENCE SYMP, ASSOC COMPUTING MACHINERY, KANSAS CITY, MO, pp. 517-523.
Guo, YJ & Barton, SK 1970, 'Flat printed zone plate antennas for DBS reception', IEE Conference Publication, pp. 355-358.
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A systematic investigation on flat printed phase correcting zone plate reflector antennas is presented. A multi-layered structure is proposed and a circular quarter-wave zone plate reflector with 54.8% efficiency is reported. When the zone plate reflector is offset, the circular zones become elliptical ones with their centers moved away successively from where the feed is pointed at. Experimental results on an offset half-wave zone plate reflector is given. Unfortunately, the antenna sidelobe level shown in the paper is much worse than that of the CCIR standard, which presently limits the zone plate reflectors as reception-only antennas. However, more recent experiments have shown that the sidelobes of the quarter-wave zone plate reflectors can be significantly improved by introducing better phase compensation and various approaches are being investigated.
Guo, YJ & Barton, SK 1970, 'On the sidelobe performance of Fresnel zone plate antennas', IEEE Antennas and Propagation Society International Symposium 1992 Digest, IEEE Antennas and Propagation Society International Symposium 1992 Digest, IEEE, pp. 2175-2178.
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Hsu, P & Su, S 1970, 'Coordinated control of multiple manipulator systems-experimental results', Proceedings 1992 IEEE International Conference on Robotics and Automation, 1992 IEEE International Conference on Robotics and Automation, IEEE Comput. Soc. Press, NICE, FRANCE, pp. 2199-2204.
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Husain, M & Waldron, KJ 1970, 'Direct position kinematics of the 3-1-1-1 Stewart platforms', American Society of Mechanical Engineers, Design Engineering Division (Publication) DE, pp. 89-97.
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In this work, a closed form solution of the direct position kinematics problem of a special class of Stewart Platform is presented. This class of mechanisms has a general feature that the top platform is connected to the six limbs at four locations. Three limbs connect at one location and the remaining limbs connect to the top platform singly at three separate locations. The base platform is connected at six different locations as is the case in the general platform. This particular class of mechanism is termed as 3-1-1-1 mechanism in this paper. It has been shown that there are a maximum of sixteen real assembly configurations for the direct position kinematics problem. This has been verified using a geometric argument also. The numerical example solved in this paper demonstrates that it is possible to obtain a set of solutions which are all real.
Lin, CT & Lee, CSG 1970, 'Real-time supervised structure/parameter learning for fuzzy neural network', [1992 Proceedings] IEEE International Conference on Fuzzy Systems, [1992 Proceedings] IEEE International Conference on Fuzzy Systems, IEEE, pp. 1283-1291.
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The authors propose a real-time supervised structure and parameter learning algorithm for constructing fuzzy neural networks (FNNs) automatically and dynamically. This algorithm combines the backpropagation learning scheme for the parameter learning and a novel fuzzy similarity measure for the structure learning. The fuzzy similarity measure is a new tool to determine the degree to which two fuzzy sets are equal. The FNN is a feedforward multi-layered network which integrates the basic elements and functions of a traditional fuzzy logic controller into a connectionist structure which has distributed learning abilities. The structure learning decides the proper connection types and the number of hidden units which represent fuzzy logic rules and the number of fuzzy partitions. The parameter learning adjusts the node and link parameters which represent the membership functions. The proposed supervised learning algorithm provides an efficient way for constructing a FNN in real time. Simulation results are presented to illustrate the performance and applicability of the proposed learning algorithm.
Miyanaga, Y & Tochinai, K 1970, 'An adaptive recognition using self-organized network', [Proceedings] 1992 IEEE International Symposium on Circuits and Systems, [Proceedings] 1992 IEEE International Symposium on Circuits and Systems, IEEE, SAN DIEGO, CA, pp. 332-335.
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Nayeri, M, Deller, JR & Krunz, MM 1970, 'Convergence and colored noise issues in bounding ellipsoid identification', [Proceedings] ICASSP-92: 1992 IEEE International Conference on Acoustics, Speech, and Signal Processing, [Proceedings] ICASSP-92: 1992 IEEE International Conference on Acoustics, Speech, and Signal Processing, IEEE, SAN FRANCISCO, CA, pp. E337-E340.
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Stuchly, MA & Esselle, KP 1970, 'Electromagnetic Stimulation of Neurons', AMPC Asia-Pacific Microwave Conference,, AMPC Asia-Pacific Microwave Conference,, IEEE, pp. 221-223.
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© 1992 IEEE. Motor neurons in the cerebral cortex and peripheral nerves can be stimulated by externally applied pulses of an electromagnetic field produced by a coil. Analyses have been performed of a simplified tissue model and various coil shapes and positions with respect to the nerve. Coils are optimized in terms of their geometry (shape and dimensions) and position considering the strength and focality of the nerve stimulus. A quadruple coil consisting of triangular sections appears to offer advantages in stimulation of shallowly-located nerves. For deep nerves, quadruple square or three-dimensional coils are preferred.
Venkataraman, SC, Kinzel, GL & Waldron, KJ 1970, 'Optimal synthesis of four-bar linkages for four-position rigid-body guidance with selective tolerance specifications', American Society of Mechanical Engineers, Design Engineering Division (Publication) DE, pp. 651-659.
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In practical rigid-body guidance problems, very often one or more of the design positions need not be generated exactly. Further, extreme accuracy at the design positions is somewhat pointless considering the inherent limitations in linkage manufacturing processes. This emphasizes the requirement of synthesis techniques to be able to handle tolerance specifications on the nominal design positions. A favorable offshoot of the tolerance incorporation would be the accompanying increase in the solution space of the synthesis problem thereby yielding better linkage solutions.
