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13th IFAC Symposium on System Identification, SYSID 2003

作者： Kumamaru, K. Inoue, K. Hosoyamada, Y. Söerström, T. Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology Kawazu 680-4 Fukuoka Iizuka820-8502 Japan Department of Automatic Control and System Analysis Institute of Technology Uppsala University P.O.Box 27 Uppsala Sweden

This paper is concerned with an application study of model-based fault detection method to a ship propulsion system. When modeling the object system, Quasi-ARMAX model with multi-model form is used. In this model, the system non-linearity is incorporated into model parameters by using non-linear non-parametric models (NNMs). Kullback discrimination Information (KDI) is introduced as fault detection index to evaluate the distortion in identified model, which is caused by a fault. The effectiveness of the method is verified through simulation studies on the ship propulsion system. © 2003 International Federation of automatic control.

关键词： Fault detection

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Database Technology and Industrial Transaction Techniques in control Education

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IFAC Proceedings Volumes 2003年第10期36卷 327-332页

作者： Jana Flochová Miroslav Galbavý Department of Automatic Control Systems Department of Computer Science Faculty of Electrical Engineering and Information Technology Slovak University of Technology Ilkovičova 3812 19 Bratislava Slovak Republic

New developments in computer networks and communications provide new possibilities for control purposes. control systems for highly complex plants are themselves very complex and heterogeneous. A new software infrastructure is needed that exploits these new emerging software technologies. An essential activity to be pursued is that of education and of including new technology in control education. The aim of this paper is to describe some of our activities and experiences in teaching of information techniques and technologies included in open control platforms of complex control systems.

关键词： Information technology Database management systems Relational databases control education Human-machine interface

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computer network and system remote management

Computer network and system remote management

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International automatic Testing Conference, AUTOTESTCON

作者： I. Peksens V. Zagursky Faculty of Coniputer Science and Information Technology Institute of Automatic Control and Computer Engineering Riga Technical University Riga Latvia Latvian University Riga Latvia

This article contains information about computer network and system remote management technologies such as SNMP, DMI and WBM, including an architectural overview and mutual comparison. There is also a look in a practical usage of these technologies as well as in management problems. In the main, it describes the author's provided management mechanism based on SNMP modifications. Finally, several pieces of advice are given about what has to be taken into account when implementing computer network and system remote management systems.

关键词： computer network management Technology management Hardware computer networks Resource management Protocols Information technology automatic control control engineering computing computer science

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Fault detection of non-linear systems based on multi-form quasi-armax modeling and its application to the ship benchmark

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IFAC Proceedings Volumes 2003年第16期36卷 1047-1052页

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

关键词： Fault detection Kullback discrimination information non-linear system parameter estimation quasi-ARMAX model

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New class of impulsive noise reduction filters based on kernel density estimation

New class of impulsive noise reduction filters based on kern...

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International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： B. Smolka K.N. Plataniotis R. Lukac A.N. Venetsanopoulos Department of Automatic Control Silesian University of Technology Poland The Edward S. Rogers Sr. Department of Electrical and Computer Engineering University of Toronto Toronto ONT Canada Slovak Image Processing Center Dobsina Slovakia Faculty of Applied Science and Engineering University of Toronto Toronto ONT Canada

The paper presents a new filtering scheme for the removal of impulsive noise in color images. It is based on estimating the probability density function for color pixels in a filter window by means of the kernel density estimation method. A quantitative comparison of the proposed filter with the vector median filter shows its excellent ability to reduce noise while simultaneously preserving fine image details.

关键词： Noise reduction Filters Kernel Colored noise Color Histograms Filtering Probability density function Shape Multidimensional systems

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IEEE International Conference on Multimedia and Expo (ICME)

In this paper a novel approach to the problem of impulsive noise removal in color images based on the nonparametric density estimation is presented. The basic idea behind the new image filtering technique is the maximization of the similarities between pixels in a predefined filtering window. The new method is faster than the standard vector median filter and preserves better edges and fine image details. Simulation results show that the proposed method outperforms other standard algorithms of the reduction of impulsive noise in color images.

关键词： Colored noise Color Filtering Pixel Strontium Educational institutions Image processing Noise reduction Nonlinear filters Gray-scale

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Uncertainty's analysis of impedance measurements in the sampling sensor instrument

Uncertainty's analysis of impedance measurements in the samp...

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TC7 Symposium on New Developments in the Field of Measurement Science 2002

作者： Augustyn, Jerzy Kielce University of Technology Faculty of Electrical Automatic Control and Computer Engineering Institute of Theoretical Electrical Engineering and Metrology al. Tysiaclecia Pañstwa Polskiego 7 Kielce25-314 Poland

The algorithms based on digital signal processing for impedance components' evaluation in circuits with sampling transducer have been analysed. It is supposed that the voltage and current are sampled synchronously to the fundamental frequency of the generated sinusoidal signal. Two fitting sine wave algorithms, which are based on the least mean square (LMS) technique, have been described. The first one reconstructs indirect measurement method. The second algorithm estimates the unknown impedance components by direct method. The uncertainty's propagation by described algorithms can be analysed by means of covariance matrix. The elements of covariance matrix are dependent on the phase angles of the measurement signals. It is shown that those algorithms provide minimization of uncertainty for selected number of samples and phase angles. The influence's simulations of quantization error of the AD converter and jitters of sampling time for described algorithms on uncertainty processing results have been carried out.

关键词： Covariance matrix

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A multiple multicast server distribution scheme for reducing the end-to-end path delay and overall load in ATM networks for single source applications

A multiple multicast server distribution scheme for reducing...

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Mediterranean Electrotechnical Conference (MELECON)

作者： A.E.-H.G. El-Barbary W. El-Haweet M.N. El-Derini Computer Science and Automatic Control Department Faculty of Engineering Alexandria University Alexandria Egypt

ATM multicasting using the multicast address resolution server (MARS) and multicasting server (MCS) has been presented as an efficient scheme for supporting IP multicast over ATM. On the other hand, Internet TV, distance learning, and file distribution are emerging large-scale multicast applications in which only a single source has to deliver data to all hosts participating in the multicast group. We introduce a new scheme for electing MCSs among all hosts in the network to minimize both the end-to-end path delay and the overall load across the network for single source applications. We introduce a new measure of the overall load which is determined by calculating the number of packets' copies multiplied by the number of hops done to complete the transmission of one packet from the sender to all members in the multicast group.

关键词： Delay Mars Virtual colonoscopy Multicast protocols Network servers Application software computer science automatic control Internet TV

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IMPROVED FEEDBACK CONSOLIDATION ALGORITHM FOR MULTICAST ABR CONNECTIONS IN ATM NETWORKS 14

IMPROVED FEEDBACK CONSOLIDATION ALGORITHM FOR MULTICAST ABR ...

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14th International Conference on computer Applications in Industry and engineering, CAINE 2001

作者： El-Sayed, Tamer M. El-Derini, Mohamed N. Selim, Mohamed S. Ahmed, Magdi A. Department of Computer Science and Automatic Control Faculty of Engineering University of Alexandria Egypt

ISBN: (纸本)9781618395344

A number of algorithms has been proposed for extending ABR congestion avoidance algorithms in ATM networks to perform feedback consolidation at the branch points of multicast connections. Schemes that attempt to maximize accuracy of feedback information tend to be slow in providing feedback to the source when the conditions in the network change. Accuracy can be traded for speed by having a switch generate feedback information before it has all the necessary information from downstream paths. This can cause consolidation noise, leading to a heavy rate at the source. In this paper, we propose improved algorithm for feedback consolidation, which combines benefits from the previous algorithms with reduced overhead. The performance of the proposed algorithm and a set of previously developed algorithms are compared under a variety of conditions. Results show that the proposed algorithm exhibits a fast transient response with accurate feedback and doesn't suffer from consolidation noise. © 2001 by the International Society for computers and Their Applications. All rights reserved.

关键词： Asynchronous transfer mode

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Restructuring Object-Oriejnted Real-Time Distributed Software For Pipeline Environment 14

Restructuring Object-Oriejnted Real-Time Distributed Softwar...

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14th International Conference on Parallel and Distributed Computing Systems, PDCS 2001

作者： Fergany, Tahany A. Sarhan, Amany Computer Science Department University of New Haven West HavenCT06516 United States Department of Computer Science and Automatic Control Faculty of Engineering Tanta University Tanta Egypt

ISBN: (纸本)9781618395740

Distributed objects are increasingly becoming predominant with the widespread use of object-oriented technology. Coupled with object-oriented systems is the heterogeneity of computer systems that are interoperating together to form a large network such as the Internet. Within this distributed heterogeneous environment, objects are the main building blocks that form the communication of the distributed system. In real-time distributed environment, objects must deliver their services within given time constraints. In order to commit to performance constraints, a careful study and analysis of the software design is critical. Therefore, this research work focuses on restructuring distributed Object Oriented software to match the pipeline architecture. This technique provides the designer with a set of alternative solutions and the corresponding resource and communication cost while satisfying the system and computation constraints. The optimal solution that minimizes the system resources and the communication overheads will be also given. A search technique using genetic algorithm is used to scan the search space for the optimal software structure and the set of feasible ones. © (2001) by the International Society for computers and Their Applications All rights reserved.

关键词： Genetic algorithms

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