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European Signal Processing Conference (EUSIPCO)

作者： B. Smolka A.N. Venetsanopoulos R. Lukac K.N. Plataniotis KBN Department of Automatic Control Silesian University of Technology Gliwice Poland Department of Electrical and Computer Engineering University of Toronto Toronto ON Canada

The rapid growth of image archives increases the need for efficient and fast tools that can retrieve and search through large amount of visual data. In this paper we propose an efficient method of extracting the image color content, which can serve as an image digital signature, allowing the efficient indexing and retrieval of large Internet-based multimedia databases. We applied the proposed method using the images from two Internet databases containing a collection of images of fine arts and a database of low resolution images, and show that the new method of image color representation is robust to image distorsions caused by resizing and compression and can be incorporated into existing web-based retrieval systems, that exploit the information on color content of digital images.

关键词： Image color analysis Histograms Image retrieval Abstracts Kernel Euclidean distance Semantics

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On stabilization of linear systems with stochastic disturbances and input saturation

On stabilization of linear systems with stochastic disturban...

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IEEE Conference on Decision and control

作者： A. Stoorvogel S. Weiland A. Saberi Department of Mathematics and Computing Science Eindhovan University of Technology Eindhoven Netherlands Department of Electrical Engineering Mathematics and Computer Science Delft University of Technnology Delft Netherlands Control Systems Group Department of Electrical Engineering Eindhovan University of Technology Eindhoven Netherlands School of Electrical Engineering and Computer Science Washington State University Pullman WA USA

It is well-known that for linear systems internal asymptotic stability implies external stability in the sense that when the external input is in L/sub p/ then also the state will be in L/sub p/. However, for the control of linear systems with saturation where the controlled system is nonlinear this implication is no longer directly applicable. Several people have studied the effect of external inputs in L/sub p/ either directly or in the context of ISS as introduced by Sontag. In this paper we study the effect of external stochastic disturbances on linear systems with input saturation and we establish that when we can achieve internal global asymptotic stability then we can also achieve a bounded variance for the state.

关键词： Linear systems Stochastic systems Asymptotic stability control systems Feedback Nonlinear control systems Open loop systems Discrete time systems Mathematics computer science

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Nonparametric approach to color based image retrieval 12

Nonparametric approach to color based image retrieval

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12th European Signal Processing Conference, EUSIPCO 2004

作者： Smolka, B. Venetsanopoulos, A.N. Lukac, R. Plataniotis, K.N. Silesian University of Technology Department of Automatic Control Akademicka 16 Str Gliwice44-100 Poland Edward S. Rogers Sr. Department of Electrical and Computer Engineering University of Toronto 10 King's College Road TorontoONM5S 3G4 Canada

ISBN: (纸本)9783200001657

关键词： Color

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Nonparametric technique of impulsive noise removal 12

Nonparametric technique of impulsive noise removal

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12th European Signal Processing Conference, EUSIPCO 2004

作者： Smolka, B. Budzan, S. Venetsanopoulos, A.N. Lukac, R. Silesian University of Technology Department of Automatic Control Akademicka 16 Str Gliwice44-100 Poland Edward S. Rogers Sr. Department of Electrical and Computer Engineering University of Toronto 10 King's College Road TorontoONM5S 3G4 Canada

ISBN: (纸本)9783200001657

In this paper a novel class of filters designed for the removal of impulsive noise in color images is presented. The proposed filter class is based on the nonparametric estimation of the density probability function in a sliding filter window. The obtained results show good noise removal capabilities and excellent structure preserving properties of the new impulsive noise removal technique. © 2004 EUSIPCO.

关键词： Impulse noise

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Reactive tabu search for optimal power flow under constrained emission dispatch

Reactive tabu search for optimal power flow under constraine...

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IEEE Region 10 International Conference TENCON

作者： D. Nualhong S. Chusanapiputt S. Phomvuttisarn S. Jantarang Electrical Engineering Department Electrical and Control System Engineering Division Electricity Generating Authority of Thailand Bangkok Thailand Department of Electrical Power Engineering Faculty of Engineering Mahanakom University of Technology Bangkok Thailand Center of Excellence in Electrical Power Technology Faculty of Engineering Chulalongkom University Bangkok Thailand Department of Computer Engineering and Satellite Research Center Faculty of Engineering Mahanakom University of Technology Bangkok Thailand

This paper presents an efficient method to obtain the optimal power flow (OPF) problem under constrained emission dispatch by applying reactive tabu search (RTS) algorithm. The RTS is developed as a derivative-free optimization technique in solving constrained emission OPF problem significantly reduces the computational burden with the strategies that make the search process robust and fast. The effectiveness of the proposed approach has been demonstrated through the IEEE 30-bus, 6-generator, test system. The simulation results reveal that the proposed RTS can yield highly optimal solution and tan reduce computational execution time superior to a standard tabu search. Moreover, the proposed method provides better solution than previous literatures with promising results.

关键词： Load flow

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Abnormality detection of a continuous pan in a sugar mill

Abnormality detection of a continuous pan in a sugar mill

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International Conference on control, Automation, Robotics and Vision (ICARCV)

作者： Liuping Wang A. Giles R. Peirce School of Electrical and Computer Engineering Royal Melbourne Institute of Technology Melbourne Australia Center for Integrated Dynamics and Control Department of Electrical and Computer Engineering University of Newcastle Australia CSR Victoria Mill QLD Australia

This paper reports an industrial application of principle component analysis to process abnormality detection in a sugar mill. The process under investigation is a continuous pan which is one of the most crucial processes in sugar production. Two sets of experimental results are obtained in this work: one is related to an artificially induced fault by a stuck valve; the other captures a naturally occurred fault due to equipment failure. The principle component analysis algorithm successfully detects both faults. Only the latter case is reported in this paper.

关键词： Milling machines Sugar industry Monitoring control charts Modems Principal component analysis Predictive models computer industry electrical products industry Industrial control

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Distributed removal algorithms for multi-rate CDMA cellular communication systems

Distributed removal algorithms for multi-rate CDMA cellular ...

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IEEE Conference on Vehicular technology (VTC)

作者： M. Elmusrati R. Jantti H. Koivo Control Engineering Laboratory Helsinki University of Technology Finland Electrical & Electronic Department Garyounis University Libya Telecommunications group Department of Computer Science University of Vaasa Finland

We study the problem of removing users from congested cells. We consider two different objectives for the removal algorithms. The first objective is to maximize the throughput. The second objective is to minimize the number of removed connections. The optimal removing problem can be classified as a combinatorial optimization problem. It is well known that there is no general closed form solution for this type of problem. Furthermore, finding the optimal solutions in medium and large sizes of these problems is usually very exhausting. Consequently, we use heuristics to solve the problem. Our proposed heuristic algorithm is very simple to implement and gives a solution close to the optimum in many different cases.

关键词： Multiaccess communication Throughput Heuristic algorithms Interference Closed-form solution Data communication Admission control Radio spectrum management Resource management Waste materials

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Bounding Approach to Parameter Estimation without Priori Knowledge on Model Structure Error

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IFAC Proceedings Volumes 2004年第11期37卷 221-226页

作者： Tao Chang Kazimierz Duzinkiewicz Mietek Brdys Department of Electronic Electrical and Computer Engineering The University of Birmingham Birmingham B15 2TT UK Fax: +44 121 414 4291. Department of Control Engineering Faculty of Electrical Engineering and Automatic Control Gdansk University of Technology ul. G.Namtowicza 11 12 80-952 Gdansk Poland.

Parameter estimation of an autoregressive movmg average (ARMA) model is discussed in this paper by using bounding approach. Bounds on the model structure error are assumed unknown, or known but conservative. To reduce this conservatism, a point-parametric model concept is proposed, where there exist a set of model parameters and structure error corresponding to each input. Feasible parameter sets are defined for point-parametric model. Bounded values on the model parameters and structure error can then be computed jointly by tightening the feasible set using observations under deliberately designed input excitations. Finally, a constantly bounded parameter model is established, which can be used for robust control.

关键词： modelling errors bounding method parameter estimation uncertain dynamic systems robust control

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A modular neural network for R2R diagnosis of semiconductor fabrication equipment: a reactive ion etching application

A modular neural network for R2R diagnosis of semiconductor ...

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IEEE/SEMI Conference and Workshop on Advanced Semiconductor Manufacturing

作者： Sang Jeen Hong G.S. May Sungwon Park Dong-Chul Park School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta GA USA Department of Information and Control Engineering Myungji University Yongin si South Korea

With the objective of facilitating improved productivity and process control, this paper investigates the use of modular neural networks (MNNs) for malfunction diagnosis in reactive ion etching (RIE) using optical emission spectroscopy (OES) data. OES data acquisition is performed for 49 experimental trials in the etching of SiLK/spl trade/ (a low dielectric constant polymer). The data collected is subsequently used for MNN modeling. MNNs consist of a number of local experts and a "gating" network, where the former map different regions of the input data space under the supervision of the gating network using a combination of supervised and unsupervised learning. 0.56% and 2.81% of errors were achieved from training and testing data set respectively: therefore, MNNs are found to be useful for diagnosis using OES data.

关键词： Neural networks Etching Optical device fabrication Productivity Process control Particle beam optics Stimulated emission Optical computing Optical fiber networks Optical polymers

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Diversity control approach to ant colony optimization for unit commitment problem

Diversity control approach to ant colony optimization for un...

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IEEE Region 10 International Conference TENCON

作者： D. Nualhong S. Chusanapiputt S. Phomvuttisarn T. Saengsuwan S. Jantarang Electrical Engineering Department Electrical and Control System Engineering Division Electricity Generating Authority of Thailand Bangkok Thailand Department of Electrical Power Engineering Faculty of Engineering Mahanakorn University Bangkok Thailand Center of Excellence in Electrical Power Technology Faculty of Engineering Chulalongkom University Bangkok Thailand Department of Electrical Engineering Faculty of Engineering Kasetsart University Bangkok Thailand Department of Computer Engineering and Satellite Research Center Faculty of Engineering Mahanakom University of Technology Bangkok Thailand

This paper presents a new method to solve the constrained unit commitment problem by applying ant colony optimization (ACO) based on the diversity control approach. The pheromone updating rule is modified to control the diversification by adopting a simple mechanism for random selection in ACO. The proposed method is tested on the 10-unit test system with a scheduling time horizon of 24 hours. The numerical results show an economical saving in the total operating cost when compared to the previous literature results. Moreover, two types of the proposed diversity control technique have the features of easy implementation and a better convergence rate superior to a standard ACO.

关键词： Ant colony optimization

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