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EUROCON 2005 - The International Conference on computer as a Tool

作者： Cracan, Arcadie M. Teodoru, CǍtǍlin Dobrea, Dan Marius Faculty of Electronics and Telecommunications Gh. Asachi Technical University of Iaşi Romania Faculty of Automatic Control and Computer Engineering Gh. Asachi Technical University of Iasi Romania

ISBN: (纸本)142440049X

This paper describes the implementation of a real-time, non contact, static hand sign recognition system using simple techniques and cost effective equipment. The system has two operation modes: Recognition mode and Learning mode. Hand sign recognition is based on an image appearance model of the human hand extracted by means of a custom transducer. The transducer is composed of a web cam and a laser plane generator. A DSP processes two images, extracts a laser trace and computes the AR coefficients which are fed to an MLP neural-network classifier. The result of the classification operation is translated into a command sent to the target system (e.g. a PC). The default set of recognized signs can be customized in Learning mode by "tuning" the system according to needs. The rates of correct recognition for all testing hand signs were in the range of 0.8÷1. © 2005 IEEE.

关键词： Pattern recognition

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A CONVERSATIONAL MAN-ROBOT INTERFACE USED IN ROBOTICS

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IFAC Proceedings Volumes 2005年第1期38卷 109-114页

作者： Catalin Buiu Ioan Dumitrache Alexandra Dumitrascu Department of Automatic Control and Systems Engineering “POLITEHNICA” University of Bucharest Faculty of Automatic Control and Computer Science Spl. Independentei 313 77206 Bucharest Romania

This paper presents a conversational interface that uses the speech recognition and synthesis and animation abilities of two Microsoft software agents in order to assure a more natural and efficient interface with an autonomous robot. The interface is used in the robotics educational process. The basic commands to be given by voice (back, right, etc.) and the control of the agents are implemented in Visual Basic. More complex control programs can be implemented and tested in Matlab and after that executed with a simple voice command. This program is used as a part of an integrated educational strategy in autonomous robotics and was evaluated by a group of students. First experimental results related to the use of this conversational interface compared to traditional robot simulation environments and control of real robots are presented in this paper with related discussions.

关键词： control education autonomous robots speech recognition conversational interface software agent

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Secure transmission of sensitive data using multiple channels

Secure transmission of sensitive data using multiple channel...

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ACS/IEEE International Conference on computer Systems and Applications

作者： A.S. Abdelhamid A.A. Belal Department of Computer Science and automatic control Faculty of Engineering Alexandria University Alexandria Egypt

Summary form only given. A new scheme for transmitting sensitive data is proposed, the proposed scheme depends on partitioning the output of a block encryption module using the Chinese Remainder Theorem among a set of channels. The purpose of using the Chinese Remainder Theorem is to hide the cipher text in order to increase the difficulty of attacking the cipher. The proposed scheme assumes the existence of a set of transmission channels between the sender and the receiver parties from which S channels are chosen using some selection criteria. The message is divided into as set of blocks of a size that is a multiple of the size of the underlying block cipher block size. The resulting N bit encrypted block is used as an N-bits integer. This integer remainders with respect to S selected relatively prime numbers are sent over the S selected channels. On the receiver side the inverse Chinese remainder is applied to get the encrypted blocks followed by a decryption operation to construct the original message. The theory, implementation and the security of this scheme are described in the paper.

关键词： Cryptography Cathode ray tubes computer science automatic control Protection Data engineering Data security Error correction codes Niobium

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Improvement of fault detection method for nonlinear black-box systems based on multi-form Quasi-Armax modeling

Improvement of fault detection method for nonlinear black-bo...

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作者： Kumamaru, K. Inoue, K. Tsubouchi, F. Söderström, T. Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology Kawazu 680-4 Iizuka 820-8502 Fukuoka Japan Department of Automatic Control and Systems Analysis Institute of Technology Uppsala University P.O.Box 27 Uppsala Sweden

ISBN: (纸本)008045108X

This paper is concerned with improvement of the KDI-based fault detection method so far developed by authors for nonlinear black-box systems. When modeling the system, Quasi-ARMAX model with multi-model structure is used. A fault due to unexpected change in system parameters will appear as the change of identified model. Kullback discrimination Information (KDI) can then be used as the fault detection index to evaluate the distortion in identified model. Several schemes to improve the fault detection performance are proposed, as well as the realization of a kind of fault isolation function based on a recognition approach in the model parameter space. The effectiveness of the method is verified through simulation studies on the ship propulsion system constructed for benchmark test. Copyright © 2005 IFAC.

关键词： Fault detection

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Adaptive H∞ -Contro1 Design for a Class of LPV Systems

Adaptive H∞ -Contro1 Design for a Class of LPV Systems

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IEEE Conference on Decision and control

作者： H.R. Karimi B. Moshiri P.J. Maralani B. Lohmann Control and Intelligent Processing Center of Excellence Department of Electrical and Computer Engineering Faculty of Engineering University of Tehran Tehran Iran Institute of Automatic Control Technical University Munich Munich Germany

In this paper, we focus on the issue of adaptive H ∞ -control design for a class of linear parameter-varying (LPV) systems based on the Hamiltonian-Jacobi-Isaac (HJI) method. By combining the idea of polynomially parameter-dependent quadratic functions and vector projection method to derive an adaptive H ∞ -control, sufficient conditions with high precision are given to guarantee both robust asymptotic stability and disturbance attenuation of the LPV systems with unknown constant parameters. The applicability of the proposed design method is illustrated on a simple example.

关键词： Robust stability Polynomials Linear matrix inequalities Symmetric matrices Attenuation Asymptotic stability Sufficient conditions automatic control Programmable control Adaptive control

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H//sub/spl infin// control of linear parameter-dependent state-delayed systems

H//sub/spl infin// control of linear parameter-dependent sta...

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IEEE Conference on control Technology and Applications (CCTA)

In this paper, we deal with the issue of robust delay-independent asymptotic stability and robust disturbance attenuation problem for linear parameter-dependent systems. Using Hamiltonian-Jacoby-Isaac approach, a parameter-dependent LMI optimization is obtained. It is shown that by utilizing polynomial parameter-dependent quadratic Lyapunov functions, a parameter-dependent LMI optimization problem is derived. Therefore, state feedback control is determined by solving a parameter-independent LMI. Finally, the applicability of the proposed design is illustrated on a simple example

关键词： control systems Lyapunov method Robust stability Process control Polynomials Attenuation Linear systems Sufficient conditions Vectors Intelligent control

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Fast technique of impulsive noise removal in multichannel images

Fast technique of impulsive noise removal in multichannel im...

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IEEE International Symposium on Industrial Electronics 2005, ISIE 2005

作者： Smolka, B. Chydzinski, A. Lukac, R. Plataniotsis, K.N. Venetsanopoulos, A.N. Silesian University of Technology Faculty of Automatic Control Electronics and Computer Science Akademicka 16 44-100 Gliwice Poland Edward S. Rogers Sr. Department of Electrical and Computer Engineering University of Toronto 10 King's College Road Toronto Ont. M5S 3G4 Canada

ISBN: (纸本)0780387384

In this paper a novel approach to the impulsive noise removal in color images is presented. The proposed technique employs the switching scheme based on the impulse detection mechanism using the so called peer group concept. Compared to the vector median filter, the proposed technique consistently yields better results in suppressing both the random-valued and fixed-valued impulsive noise. The main advantage of the proposed noise detection framework is its enormous computational speed, which enables efficient filtering of large images in real-time applications. © 2005 IEEE.

关键词： Noise abatement

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Global optimization in complex circuits design

Global optimization in complex circuits design

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International Symposium on Signals, Circuits and Systems (ISSCS)

作者： C. Pruteanu D. Galea C.-G. Haba Faculty of Automatic Control and Computer Science Gheorghe Asachi Technical University of Iasi Iasi Romania Faculty of Electrical Engineering Gheorghe Asachi Technical University of Iasi Iasi Romania

Today's circuit design process is become a complex task. Sequential logic synthesis is an important part of the circuit design flow. The logic synthesis phase is a bottleneck during the overall design process since heuristic techniques which take a considerable amount of time are often used during this phase. A good solution is realized in a constrained design space by using global optimization techniques. The purpose of this paper is to develop a robust optimization algorithm, that searches the solution space as efficiently as possible in order to find a global optimization of the internal states of a specified circuit, as a global solution to a high level synthesis problem.

关键词： Design optimization Circuit synthesis Constraint optimization Logic design Sequential circuits Process design automatic control computer science Robustness High level synthesis

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Hierarchical model predictive control of integrated quality and quantity in drinking water distribution systems

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Urban Water Journal 2005年第2期2卷 125-137页

作者： Duzinkiewicz, K. Brdys, M. A. Chang, T. Department of Control Engineering Faculty of Electrical Engineering and Automatic Control Gdánsk University of Technology. G. Narutowicza 11/12 Gdánsk 80-952 Poland Department of Electronic Electrical and Computer Engineering School of Engineering The University of Birmingham Birmingham B15 2TT UK

An integrated approach to control of quantity and quality in water supply and distribution systems is proposed. The integrated control consists in optimising the operational cost, meeting a demand on water of desired quality and maintaining the system constraints. This constrained optimising control problem is complex due to nonlinearities, large dimension, output constraints, mixed-integer structure of the variables involved, at least two time scales in the system dynamics and an uncertainty. A sub-optimal two-level hierarchical control structure is proposed that allows incorporating the desired controller functions and yet making the synthesis of these functions possible. The algorithms for implementing the functionalities are proposed and discussed. Detail design of the lower level controller is presented and investigated. The controller performance is validated by simulation. [ABSTRACT FROM AUTHOR]

关键词： Bounding method Chlorine residuals Constraints Predictive control Transport delay Uncertain dynamic systems Water quality control

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Fast technique of impulsive noise removal in multichannel images

Fast technique of impulsive noise removal in multichannel im...

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IEEE International Symposium on Industrial Electronics (ISIE)

作者： B. Smolka A. Chydzinski R. Lukac K.N. Plataniotsis A.N. Venetsanopoulos Faculty of Automatic Control Electronics and Computer Science Silesian University of Technology Gliwice Poland Edward S. Rogers Sr. Department of Electrical and Computer Engineering University of Toronto Toronto ONT Canada

关键词： Nonlinear filters Vectors Colored noise Color Noise reduction automatic control computer science Strontium Educational institutions Filtering

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