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International Symposium on computer Vision (ISCV)

作者： J.C. Glas F. van der Heijden Department of Electrical Engineering Control Systems and Computer Engineering Group.Laboratory for Measurement Science and Instrumentation University of Twente Enschede Netherlands Lab. for Meas. Sci. & Instrum. Twente Univ. Enschede Netherlands

Iterative least-squares estimation requires accurate reflectance models to retrieve geometrical parameters of 3-D objects from an image projection. We investigate the use of separating the diffuse (body) reflection from the specular (surface) reflection, where the latter is responsible for image highlights. The performance of several models has been analysed by comparing local higher-order derivatives of the least-squares error function. Experiments show that the (smooth) diffuse component yields the best convergence properties, while the (sharp) specular component cast be utilized to improve noise insensitivity.

关键词： Parameter estimation Performance analysis Convergence Reflectivity Noise measurement Optical reflection Image retrieval Additive noise Velocity measurement computer errors

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automatic generation of a neural network architecture using evolutionary computation

Automatic generation of a neural network architecture using ...

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Electronic Technology Directions to the Year 2000

作者： E. Vonk L.C. Jain L.P.J. Veelenturf R. Johnson Control Systems and Computer Engineering Group BSC Laboratory for Network Theory Department of Electrical Engineering University of Twente Enschede Netherlands Knowledge-based Engineering System Group School of Electronic Engineering University of South Australia Adelaide Australia Weapons Systems Division Defence Science and Technology Organisation Salisbury SA Australia

This paper reports the application of evolutionary computation in the automatic generation of a neural network architecture. It is a usual practice to use trial and error to find a suitable neural network architecture. This is not only time consuming but may not generate an optimal solution for a given problem. The use of evolutionary computation is a step towards automation in architecture generation. In this paper a brief introduction to the field is given as well as an implementation of automatic neural network generation using genetic programming.< >

关键词： Neural networks computer architecture Evolutionary computation Genetic programming Network topology Genetic algorithms Biological cells systems engineering and theory Knowledge engineering Australia

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Development and application of MCAL tools for marine radar instruction

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computer Applications in Engineering Education 1995年第4期3卷 259-259页

作者： Guirguis, S. Korany, E. Abdel-Bary, A. Institute of Graduate Studies and Research Alexandria University Alexandria Egypt Shawkat K. Guirguis:obtained the BSc and M.Sc. degrees in Computer Science and Automatic Control Faculty of Engineering Alexandria University in 1981 and 1984 respectively. In 1988 he obtained a PhD degree in Electronics and Communications Faculty of Engineering Cairo University co-supervised by the Imperial College of Science and Technology University of London where he spent two years as an academic visitor. His current research interests include software quality management multimedia automatic programming and decision support systems. He is currently a lecturer of Computer Science at the Institute of Graduate Studies & Research Alexandria University. Ezzat A. Korany:received the BS degree in Electrical Engineering (Electronics Section) from the University of Alexandria Egypt in 1971 the MS degree in Electrical Engineering (Computer Section) from Ain Shams University Cairo Egypt in 1977 and the PhD degree in Electrical Engineering (Digital Systems) from Florida Institute of Technology U.S.A. in 1982. He is currently an associate professor of Computer Science at the Institute of Graduate Studies & Research University of Alexandria. His research interests are in data communications and multimedia applications computer networks image processing and pattern recognition. Abdel-Latif A. Abdel-Bary:obtained the BEng degree in Electronics Technology from Arab Maritime Transport Academy in 1986. In 1995 he obtained the MSc degree in Information Technology from the Institute of Graduate Studies & Research Alexandria University. His current research interests include ICAL hypermedia and automatic programming.

In this article a multimedia computer-assisted learning (MCAL) system is presented. The major objective of this work was to investigate the potential of using such systems as tools for transferring instructional course information through various types of computer media as opposed to the classic CAL systems. The philosophy and techniques employed to design the system are investigated. Usage of the implemented system and its merits have been illustrated through its application to teach engineering students and technicians the theory and concepts of marine radar. System design, implementation, test, and revision phases are presented and discussed.

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Three domain voting in real-time distributed control systems 2

Three domain voting in real-time distributed control systems

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2nd Euromicro Workshop on Parallel and Distributed Processing, PDP 1994

作者： Bass, Julian M. Croll, Peter R. Fleming, Peter J. Woolliscroft, Les J.C. Department of Automatic Control and Systems Engineering University of Sheffield P. O. Box 600 Mappin Street SheffieldS1 4DU United Kingdom Department of Computer Science University of Sheffield United Kingdom

ISBN: (纸本)0818653701

An intelligent and robust voting service for real-time distributed control systems is proposed. Three novel features of the voter are described. Firstly, the voter is distributed using a primary site algorithm. This algorithm is used to coordinate the voter elements ensuring service is provided even in the presence of single faults. Secondly, the voter is capable of selecting a correct result in certain cases of disagreement. This is achieved by monitoring the temporal behaviour and reliability of the application modules in addition to the comparison of numerical result values, an approach called Three Domain Voting. Thirdly, inclusion of a voting service in a Framework of tools for the design of real-time distributed control software is discussed. The Framework allows control engineers to specify their problem in a familiar application specific manner. The tools then provide a highly transparent transformation to an executable implementation. © 1994 IEEE.

关键词： Fault tolerance

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On the Computation of the Maximal Corank of a Covariance Matrix Under the Frisch Scheme

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IFAC Proceedings Volumes 1994年第8期27卷 1133-1135页

作者： R.P. Guidorzi A. Stoian University of Bologna Dept. of Electronics Systems and Computer Science Bologna Italy Polytechnic Institute of Bucharest Department of Automatic Control Bucharest Romania

A simple algorithm for establishing the presence of points common to some singularity (hyper)surfaces associated to covariance matrices is developed. It allows, on the basis of the new algebraic and geometric properties recently given by Guidorzi (1994), the computation of the maximal number of linear relations that can be associated to a given set of data.

关键词： Linear algebra Frisch scheme system identification parameter estimation linear systems

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A prototype framework of design tools for computer-aided control engineering

A prototype framework of design tools for computer-aided con...

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IEEE International Symposium on computer Aided control System Design (CACSD)

作者： A.R. Browne J.M. Bass P.R. Croll P.J. Fleming Department of Automatic Control and Systems Engineering University of Sheffield Sheffield UK Department of Computer Science University of Sheffield Sheffield UK

This paper introduces a framework of tools which allow the design of distributed, potentially fault-tolerant, real-time control software. This framework takes a system specified in the control engineering domain and translates this application-oriented representation into a software engineering representation. From this new representation, automatic code generation tools have been developed to create a complete, executable control system implementation.< >

关键词： Prototypes control engineering computing control engineering control systems Design engineering computer aided software engineering Software engineering Software tools automatic generation control Real time systems

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Stability of switched and hybrid systems

Stability of switched and hybrid systems

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IEEE Conference on Decision and control

作者： M.S. Branicky Laboratory for Information and Decision Systems Department of Electrical Engineering and Computer Science Center for Intelligent Control Systems Massachusetts Institute of Technology USA

This paper outlines some preliminary work on the stability analysis of switched and hybrid systems. The hybrid systems considered are those that combine continuous dynamics, represented by differential or difference equations, with finite dynamics usually thought of as being a finite automaton. Here, we concentrate on the continuous dynamics and model the finite dynamics as switching among finitely many continuous systems. We introduce multiple Lyapunov functions as a tool for analyzing Lyapunov stability of such "switched systems". We use iterated function systems theory as a tool for Lagrange stability. We also discuss the case where the switched systems are indexed by an arbitrary compact set.< >

关键词： Stability Switched systems Difference equations Differential equations Automata Lyapunov method Intelligent control Lagrangian functions control systems Laboratories

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automatic Derivation of World Update Schemes 2

Automatic Derivation of World Update Schemes

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2nd International Conference on Artificial Intelligence Planning systems, AIPS 1994

作者： Downs, Joseph Reichgelt, Han Shadbolt, Nigel Department of Automatic Control and Systems Engineering University of Sheffield SheffieldSI 4DU United Kingdom Subdepartment of Computer Science Department of Mathematics University of the West Indies Kingston 7 Mona Jamaica Artificial Intelligence Group Department of Psychology University of Nottingham NottinghamNG7 2RD United Kingdom

ISBN: (纸本)0929280563

Al planning systems must be able to update their internal model of the domain in order to determine the effects of a possible action. The most widely used update method is the STRIPS operator. STRIPS operators are extremely effìcient. However, the use of STRIPS operators requires that one specify all the consequences of an action beforehand. This becomes almost impossible for complex domains. Work by Pednault (1989) and Wilkins (1988) overcomes the problems associated with ordinary STRIPS operators by enhancing them with context-dependent effects and demons respectively. In this paper we describe a modelling procedure which can incorporate both these features. Moreover, the update method is automatically derived from an axiomatisation of the domain in temporal calculus. This allows the system designer great flexibility in choosing the trade-off point between representational expressivity against computational speed. Copyright © 1994, AAAI (***). All rights reserved.

关键词： Economic and social effects

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A feedback limitation of decentralized controllers for TITO systems, with application to a reactive ion etcher

A feedback limitation of decentralized controllers for TITO ...

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IEEE Conference on Decision and control

作者： J.S. Freudenberg J.W. Grizzle B.A. Rashap Electronics Manufacturing and Control Systems Laboratory Department of Electrical Engineering and Computer Science University of Michigan Ann Arbor MI USA

This paper explores an inherent feedback limitation of using decentralized LTI control on a two-input, two-output LTI plant. The result is motivated by, and illustrated on, a reactive ion etcher.

This paper explores an inherent feedback limitation of using decentralized LTI control on a two-input, two-output LTI plant. The result is motivated by, and illustrated on, a reactive ion etcher.< >

关键词： Feedback control systems Etching Centralized control Actuators Chemical processes Plasma applications computer aided manufacturing Semiconductor device noise Power system modeling

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Interpolation and numerical differentiation for observer design

Interpolation and numerical differentiation for observer des...

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American control Conference (ACC)

作者： S. Diop J.W. Grizzle P.E. Moraal A. Stefanopoulou The Control Systems Laboratory of the Dept. Elect. Eng. and Comp. Sci. U. of Michigan Control Systems Laboratory Department of Electrical Engineering and Computer Science University of Michigan AnnArbor MI

This paper explores interpolation and numerical differentiation as a basis for constructing a new approach to the design of nonlinear observers.

关键词： Interpolation control systems Observers Sampling methods Laboratories Equations Observability State estimation Sampled data systems Numerical analysis

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