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CONCURRENT LARGE-SIGNAL SIMULATION OF AN ACTIVE MICROSTRIP ANTENNA

INTERNATIONAL JOURNAL OF NUMERICAL MODELLING-ELECTRONIC NETWORKS DEVICES AND FIELDS 1995年第1期8卷 3-12页

作者： MCDOWALL, DS FUSCO, VF High Frequency Electronics Laboratory. Department of Electrical and Electronic Engineering The Queen's University of Belfast Ashby Building Stranmillis Road Belfast BT9 5AH U.K. D. Stewart McDowall was born in Dublin Republic of Ireland in 1967. He received the M. Eng. degree in Electrical and Electronic Engineering from the Queen's University of Belfast in 1990. In the same year he was presented with a Distinction Award from the Departmnet of Education of Northern Ireland and he is currently pursuing his Ph.D. in the Microwave Research Group at Q.U.B. His principal research area is the electromagnetic field mapping of microwave systems using concurrent programming. He is an Associate Member of the Institute of Electrical Engineers. Vincent F. Fusco was educated at the Queens's University of Belfast where he obtained the degree of Ph.D. in 1982. He has worked as a research engineer on short-range radar and radio telemetry systems. Currently he is a reader in Microwave Communications in the School of Electrical engineering and Computer Science the Queen's University of Belfast. His current research interests include non-linear microwave circuit simulatino and concurrent programming techniques for electromagnetic field problems with particular emphasis on EMC applications. He has published numerous research papers in these areas. He is the author of the bookMicrowave Circuits Analysis and Computer Aided Design Prentice-Hall 1987. Dr Fusco is a Chartered Electrical Engineer and a Member of the Institute of Electrical Engineers.

This paper details the use of a circuit-based EM modelling technique combined with a harmonic balance simulator used to model the radiation from the microstrip bodies comprising an active antenna circuit. The modelling approach adopted for the planar bodies in the circuit will be shown to allow the use of concurrent algorithms in order to reduce overall computational time.

关键词： Microstrip antennas

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Windows computer laboratory as a tutorial for undergraduate electromagnetics

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computer Applications in engineering Education 1995年第3期3卷 183-183页

作者： McCulloch, J. Keddy, W.A. Stuchly, M.A. University of Victoria Department of Electrical and Computer Engineering University of Victoria Victoria British Columbia Canada Janet McCulloch:is a native of Toronto Canada where she briefly attended both York University and the University of Toronto before she set off on a year-long adventure through the Middle East and North Africa. When she returned to Canada she relocated to California. She spent a number of years living both in Los Angeles and coastal Northern California interspersed with several extended trips through the United States Mexico and Central America. Ms. McCulloch moved to Victoria British Columbia in 1989 and a year later registered in the cooperative education program in Electrical Engineering at the University of Victoria. She is presently in the fifth and final year of the program and has her sights set on graduate school. Besides the work described in this article she has been very much involved in the use of technology to assist in the delivery of curriculum at the senior secondary level. She lives on a country property a half-hour from the University with her husband her horse and three cats. W. Alfred Keddy:is an applications programmer/analyst for the Department of Electrical and Computer Engineering at the University of Victoria. He received a BEng (1988) in Electrical Engineering and an MASc (1994) from the University of Victoria. His research interests include distributed systems image processing local area networks VLSI and DSP system design for computation and communication and human–computer interface design. Maria A. Stuchly:received an MSc in Electrical Engineering in 1962 from Warsaw Technical University and a PhD in Electrical Engineering from the Polish Academy of Sciences in 1970. Between the years of 1962 and 1970 she was with the Warsaw Technical University an Institute of the Polish Academy of Sciences. After immigrating to Canada during 1970 her first position was with the University of Manitoba. In 1976 she became employed by the Bureau of Radi

Contents and implementation of a computer laboratory for undergraduate electromagnetics are described. The laboratory consists of four 3-hour sessions covering vector calculus, Maxwell's equations (integral and differential forms), wave propagation in materials, and wave behavior at planar interfaces. Each session contains theory (in the Help file), animations (where relevant) and a quiz. The program runs on IBM compatible 486-based PCs in a Windows environment and uses the Borland C ++ 4.0 compiler.

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Method for distance estimation of single‐phase‐to‐ground faults in electrical distribution networks with an isolated or compensated neutral

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European Transactions on electrical Power 1995年第3期5卷 193-198页

作者： Lehtonen, M. Matti Lehtonen (1959) received his degrees of Master of Science and Licenciate of Technology both in electrical engineering from the Helsinki University of Technology Helsinki/Finland in 1984 and 1989 respectively. From 1984 to 1987 he was with the Consulting Company Ekono planning industrial power systems and developing computer-aided design systems. Since 1987 he has been with Technical Research Centre of Finland. His main areas of interest are harmonics reactive power compensation ground-fault protection and automation in electrical distribution networks. (Technical Research Centre of Finland Otakaari 7 B SF-02150 E s p Finland T +35 80/4566455 Fax +35 80145665 38)

The paper discusses how current and voltage measurements derived from the substation can be used for single‐phase‐to‐ground fault location in medium‐voltage distribution lines. The networks considered are assumed to be radially operated with either an isolated or compensated neutral. In these networks the fundamental frequency ground fault currents usually are so small that no reasonable fault‐distance estimate can be based on them. A possible solution is the utilisation of ground‐fault initial transients. In this paper a method for ground‐fault distance estimation, based on the least squares estimation of transient parameters, is presented. Copyright © 1995 John Wiley & Sons, Ltd.

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Development of multimedia modules for education

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computer Applications in engineering Education 1995年第2期3卷 97-97页

作者： Iskander, M.F. Catten, J.C. Jameson, R. Jones, A. Balcells, A. CAEME Center College of Engineering University of Utah Salt Lake City Utah 84112 Dr. Iskander edited a book onMicrowave Processing of Materialspublished by the Materials Research Society in 1994 and authored a textbook onElectromagnetic Fields and Waves published by Prentice Hall 1992. He edited theCAEME Software Book Vol. I 1991 Vol. II 1994 and coedited two other books onMicrowave Processing of Materials both published by the Materials Research Society in 1991 and 1992. Dr. Iskander edited two special issues of theJournal of Microwave Power one on “Electromagnetics and Energy Applications” March 1983 and the other on “Electromagnetic Techniques in Medical Diagnosis and Imaging” September 1983. He also edited a special issue of theACES Journalon computer-aided electromagnetics education. He has published over 150 papers in technical journals and made numerous presentations in technical conferences. Dr. Iskander is the editor of the journalComputer Aplications in Engineering Education (CAE) published by John Wiley & Sons Inc. He is a fellow of IEEE and a member of the National Research Council Committee on Microwave Processing of Materials. His present fields of interest include the use of numerical techniques in electromagnetics. Rex M. Jameson:received his BS in Physics from Stanford University in 1992 and his ME in Electrical Engineering from the University of Utah in 1995. He currently works for the CAEME Center as a programmer. Antony K. Jones:has extensive experience with three-dimensional computer-rendered graphics on Macintosh Amiga and PC platforms. He has had years of commercial experience with the design and printing of computer-generated graphics. Albert R. Balcells:received a Telecommunication Engineering degree in 1994 from the Superior School of Telecommunication of Barcelona Polytechnic University of Catalunya (EC) and is currently pursuing a MS degree in Electrical Engineering from the University of Utah. He has experience in DOS and UNIX-based systems and is fluent in C C++

Development of multimedia modules and courses for engineering education present a significant opportunity to modernize curricula and improve the effectiveness of teaching and learning. In this article we review the various hardware and software components required to develop multimedia lessons and discuss the role of each component in the structure of a multimedia module. Examples of multimedia lessons developed for CD-ROM distribution by the Center for Multimedia Education and Technology (CAEME) at the University of Utah are described. These include multimedia lessons in electromagnetics, the Calculus Castle, and the Physics Museum. It is shown that although extensive resources and expertise are often needed to develop these modules, development software and associated technologies are readily available and educators are encouraged to take advantage of these opportunities to reform, restructure, and improve engineering education.

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Calculation of the temperature distribution in an asynchronous machine

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European Transactions on electrical Power 1995年第3期5卷 181-186页

作者： Xypteras, J. Maras, K. Spyrelis, D. Associate Professor Dr.-Ing. Jannis Xypteras (1937) Director of the Electrical Machines Laboratory Dept. of Electrical Engineering Aristotle University of Thessaloniki (AUT)/Greece graduated from the Fakultatfur Elektrotechnik of the RWTH AachedGermany. During the years 1965 to 1980 he had been employed in German and Greek factories for electrical machines several years as chief of development departments. In 1978 he obtained his Dr. Electr. Eng. degree in the AUT. His subject was in the area of eddy currents. Since 1984 he is Ass. hofessor in the same University. His special interests: Design and development of electrical machines vibration and noise problems electromagnetic fields eddy currents. (Dept. of Electrical Engineering Aristotle University GR-54006 Thessaloniki/Greece T +30 3 1 I99 62 93 Fax +303 11 99 63 02) Kostas Maras (1966) received his degree in Electrical Engineering from the Electrotechnical Faculty of Aristotle University of Thessaloniki/Greece in 1989. In 1990 he graduated as M.Sc. in Digital Electronics in the King's College London at the University of LondordGB with the project “Design of a Transversal Filter on VLSI CMOS”. Since then he has been working at M. Papasavas S.A. at KallithedGreece as an analyst in developing industrial software. Projects: Design and implementation of a dynamic relational model used to tackle production problems in industry. From 1991 to 93 he was responsible for the development of production planning used in industries. (M. Papasavas S.A. Sofocleus 261 GR-17874 KallithedGreece T +30 119423246 Fax +30 1/9429561) Dimitrios S. Spyrelis (1965) received his Diploma in Electrical Engineering from the University of Thessalonikil Greece in 1989. In 1990 he joined the Coding Center of Greek Army as research Assistant. He is currently working as technical director in a pigpoultry breeding company which includes feed processing industry slaughter houses by product process industry wastes treatment systems from farm livestock. His last fields of interest

In this paper the temperature distribution on the section vertical to the axis of an asynchronous machine is calculated. For the calculation the numerical method of “Control Volumes” has been used. The technique used can be easily modified to fit any kind of machine. It can also analyse transients. Copyright © 1995 John Wiley & Sons, Ltd.

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PLACING REGISTRATION MARKS

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IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS 1994年第1期41卷 51-59页

作者： RAO, AS GOLDBERG, KY Department of Computer Science University of Utrecht Utrecht Netherlands Departments of Computer Science and Electrical Engineering-Systems Institute of Robotics and Intelligent Systems University of Southern California Los Angeles CA USA

In industrial assembly, a registration mark can be placed on parts to aid a computer vision system in determining the position and orientation (pose) of parts. However, when sensor noise and limits on resolution introduce errors in the measured location of the registration mark, these errors can propagate into the measurement of part pose. In this paper, we define the registration mark problem: given an n-sided rigid planar polygonal part-and a set of k poses for the part, locate a point on the surface of the part that maximizes the minimum distance between transformed points. A registration mark at this point will be maximally robust to sensor imperfections. We give an 0(n log n + k4 log k log* k) time algorithm to solve this planar problem using a result from Schwartz and Sharir [21], and demonstrate the algorithm using a commercial vision system. Our results extend to classes of curved planar parts and polyhedral parts.

关键词： computer vision computer errors Noise measurement Manufacturing automation Robotics and automation computer science Intelligent robots computer industry Assembly systems Robustness

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Detection and location of given sets of errors by nonbinary linear codes 1st

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1st French-Israeli Workshop on Algebraic Coding, 1993

作者： Karpovsky, Mark G. Chaudhry, Saeed M. Levitin, Lev B. Moraga, Claudio Research Laboratory of Design and Testing of Computer Hardware Department of Electrical Computer and Systems Engineering Boston University BostonMA02215 United States Department of Computer Science University of Dortmund Dortmund 504600 Germany

ISBN: (纸本)9783540578437

The problem of constructing codes capable of detection and location of a given set of errors is considered. Lower and upper bounds on a number of redundant symbols for an arbitrary set of errors are derived. These codes can be used for error detection and identification of faulty processing elements in multiprocessor systems. To this end, new classes of codes for several types of error sets such as stars, trees and FFTs meshes are presented. The concepts of strong and weak diagnostics (SD and WD, respectively) are introduced and discussed. © 1994, Springer Verlag. All rights reserved.

关键词： Location

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Fuzzy clustering neural network system design and implementation

Fuzzy clustering neural network system design and implementa...

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Midwest Symposium on Circuits and systems (MWSCAS)

作者： D. Zhang M. Kamel M.I. Elmasry Electrical and Computer Engineering VLSI Research Group Pattern Analysis and Machine Intelligence Systems Design Engineering University of Waterloo Waterloo ONT Canada

In this paper, a novel VLSI system design methodology for fuzzy clustering neural networks (FCNN) is presented. This methodology emphasizes a coordination between model definition, architectural description, and hardware implementation, Two mapping strategies, from FCNN model to parallel architecture and from architecture to systolic implementation, are discussed. The system design is achieved by 1) developing an effective FCNN model, where a direct fuzzy competitive learning algorithm between the nodes is adopted; 2) designing the corresponding parallel architecture with special feedforward and feedback paths; 3) building the systolic array (SA) suitable for VLSI.

关键词： Fuzzy neural networks Fuzzy systems Neural networks Very large scale integration System analysis and design design engineering Hardware Clustering algorithms Systolic arrays Computational modeling

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A simple method for the collision avoidance of telerobotic manipulators

A simple method for the collision avoidance of telerobotic m...

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IEEE International Conference on Robotics and Automation (ICRA)

作者： R.V. Mayorga F. Janabi-Sharifi A.K.C. Wong Department of Systems Design Engineering University of Waterloo Waterloo ONT Canada Department of Electrical and Computer Engineering University of Waterloo Waterloo ONT Canada

In this article a fast and simple method for the motion planning of telerobotic manipulators is presented. It is based on solving numerically a linear system of equations that includes a simple null space vector for obstacle avoidance, and an efficient procedure for the appropriate damping of the pseudoinverse matrix. This approach enables the pursuance simultaneously, of both collision avoidance and singularities prevention on-line in a sensor based environment. These properties also make it suitable for entirely autonomous operations.< >

关键词： Collision avoidance Telerobotics Robustness Kinematics Least squares methods Manipulators Linear systems Null space Vectors Master-slave

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A versatile algorithm for two-dimensional symmetric noncausal modeling

A versatile algorithm for two-dimensional symmetric noncausa...

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IEEE International Conference on Image Processing

作者： G.-O. Glentis C.H. Slump O.E. Herrmann Department of Electrical Engineering Control Systems and Computer Engineering Group (BSC) Laboratory for Network Theory and VLSI-Design University of Twente Enschede Netherlands

In this paper a novel algorithm is presented for the efficient two-dimensional (2-D) symmetric noncausal finite impulse response (FIR) filtering and autoregressive (AR) modeling. Symmetric filter masks of general boundaries are allowed. The proposed algorithm offers the greatest maneuverability in the 2-D index space in a computational efficient way. This flexibility can be taken into advantage if the shape of the 2-D mask is not a priori known and has to be dynamically configured.< >

关键词： Finite impulse response filter Nonlinear filters Autocorrelation Equations Vectors Virtual manufacturing Filtering algorithms Control system synthesis Control engineering computing computer networks

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