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First International Conference on Natural Computation, ICNC 2005

作者： Lian, Hui-Cheng Lu, Bao-Liang Takikawa, Erina Hosoi, Satoshi Department of Computer Science and Engineering Shanghai Jiao Tong University 1954 Hua Shan Rd. Shanghai 200030 China Sensing and Control Technology Laboratory OMRON Corporation Japan

Considering the fast respond and high generalization accuracy of the min-max modular support vector machine (M3-SVM), we apply M3-SVM to solving the gender recognition problem and propose a novel task decomposition method in this paper. Firstly, we extract features from the face images by using a facial point detection and Gabor wavelet transform method. Then we divide the training data set into several subsets with the 'part-versus-part' task decomposition method. The most important advantage of the proposed task decomposition method over existing random method is that the explicit prior knowledge about ages contained in the face images is used in task decomposition. We perform simulations on a real-world gender data set and compare the performance of the traditional SVMs and that of M3-SVM with the proposed task decomposition method. The experimental results indicate that M3-SVM with our new method have better performance than traditional SVMs and M3-SVM with random task decomposition method. © Springer-Verlag Berlin Heidelberg 2005.

关键词： Face recognition

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DSA image registration based on multiscale Gabor filters and mutual information

DSA image registration based on multiscale Gabor filters and...

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ICIA 2005: 2005 International Conference on Information Acquisition

作者： Cao, Zhiguo Liu, Xiaoxiao Peng, Bo Moon, Yiu-Sang Key Laboratory Huazhong University of Science and Technology Ministry of Education for Image Processing and Intelligent Control Wuhan 430074 China Department of Computer Science and Engineering Chinese University of Hong Kong Shatin N.T. Hong Kong

ISBN: (纸本)0780393031

In clinical practice, digital subtraction angiography (DSA) is a powerful technique for the visualization of blood vessels in X-ray image sequences. Different with traditional DSA image registration processes, in our proposed image registration method, the control points are selected from the vessel centerlines using multiscale Gabor filters, and mutual information (MI) is then taken as the similarity criterion to find the correspondences. Experimental results demonstrate our algorithm efficiently yields satisfying registration result for DSA images. © 2005 IEEE.

关键词： Medical imaging

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Distributed sensor network data fusion using image processing

Distributed sensor network data fusion using image processin...

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Proceedings of the Systems Communications, SENET

作者： M. Elmusrati R. Jantti H. Koivo Control Engineering Laboratory Helsinki University of Technology Finland Department of Computer Science Vaasa University Finland

In this paper we discuss the analogy between spatial distributed sensor network analysis and image processing. The analogy comes from the fact that in high density sensor networks the output of sensors is correlated both spatially and temporally. This means that the output of a sensor is correlated with the outputs of its neighbours. This characteristic is very similar to the pixels' output (intensity) in video signals. The video signal consists of multiple correlated frames (correlation in time), and each frame consists of large number of pixels, and usually there is high correlation between pixels (spatial correlation). By defining this relation one can use the well-known image processing techniques for sensor data compression, fusion, and analysis. As an example we show how to use the quadtree image decomposition for sensor spatial decomposition.

关键词： Image sensors Sensor fusion Image processing Sensor phenomena and characterization Image analysis Video compression Data compression Military computing Home automation Data mining

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On downlink throughput maximization in DS-CDMA systems

On downlink throughput maximization in DS-CDMA systems

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IEEE Conference on Vehicular technology (VTC)

作者： D. Zhao M. Elmusrati R. Jantti Control Engineering Laboratory Helsinki University of Technology Finland Department of Computer Science University of Vaasa Vaasa Finland

In this paper, some important characteristics for the aggregate system capacity maximization in downlink of DS-CDMA systems are studied. We derive a close form solution for the optimal power allocation in the case that the users are orthogonal to each other. Theoretically, this orthogonality condition between M active users can be achieved by using null steering adaptive antenna array with at least M antenna elements. In addition, we study the loss of orthogonality and suggest a set of rules for finding the optimal active users. Based on the set of rules we propose two heuristic guided suboptimal scheduling algorithms, which can achieve close to optimal performance in non-orthogonal situation, moreover they can achieve the optimum performance in perfect orthogonal situation.

关键词： Downlink Throughput Multiaccess communication Aggregates Adaptive arrays Signal to noise ratio Interference computer science Antenna theory Scheduling algorithm

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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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Measuring the Performance of Iterative Learning control Systems

Measuring the Performance of Iterative Learning Control Syst...

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IEEE International Symposium on Intelligent control (ISIC)

作者： J.D. Ratcliffe P. Lewin E. Rogers J.J. Hatonen T. Harte D.H. Owens School of Electronics and Computer Science University of Southampton Southampton UK Department of Automatic Control and Systems Engineering University of Sheffield Sheffield UK Systems Engineering Laboratory University of Oulu Finland

Iterative learning control has the potential to significantly improve the tracking performance of repeating trajectory control systems. However, until now little attempt has been made to measure this performance quantitatively. A new iterative learning control performance index PI N is introduced which allows direct, quantitative, performance comparison of different algorithms, or alternatively a single algorithm which has variable tuning parameters. In particular, PI N can be used as a tool for selecting and adjusting algorithm tuning parameters. Application of the new performance index is demonstrated with both simulation studies and practical implementation on a gantry robot

关键词： control systems Performance analysis Adaptive control Trajectory Iterative algorithms Three-term control Systems engineering and theory Modeling Convergence Stability analysis

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ROBUST LOAD-SHARING control OF SPACECRAFT FORMATIONS

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IFAC Proceedings Volumes 2005年第1期38卷 324-329页

作者： M. Garcia-Sanz F.Y. Hadaegh Automatic Control and Computer Science Department Public University of Navarra 31006 Pamplona SPAIN Jet Propulsion Laboratory. California Institute of Technology 4800 Oak Grove Dr. Pasadena CA 91109 USA

This paper focuses on the design of autonomous and collaborative control strategies to govern the relative distances among multiple spacecraft in formation with no ground intervention. A coordinate load-sharing control structure for formation flying and a methodology to control their dynamic models with slow time-varying and uncertain parameters are the main objectives of this work. The method is applied to a deep space formation example, where the uncertainty in spacecraft fuel masses is also considered.

关键词： Formation Flying Multi-spacecraft Robust control Co-operative control

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Distributed health monitoring for aero-engines on the GRID: DAME

Distributed health monitoring for aero-engines on the GRID: ...

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IEEE Conference on Aerospace

作者： T. Jackson J. Austin M. Fletcher M. Jessop Bojian Liang A. Pasley M. Ong X. Ren G. Allan V. Kadirkamanathan H.A. Thompson P.J. Fleming Advanced Computer Architectures Group (ACAG) Department of Computer Science University of York York UK Rolls-Royce Supported University Technology Centre in Control and Systems Engineering Department of Automatic Control and Systems Engineering University of Sheffield Sheffield UK

We provide an overview of the DAME project, and a discussion of the progress made to date on the development of a distributed aeroengine diagnosis environment as a proof of concept demonstration for grid computing. We discuss the development of a demonstration diagnosis workbench system for this complex, data intensive, diagnosis application that must be operated as a distributed 'virtual organisation'. We describe the core diagnosis applications that have been implemented as grid services, and explain how these services are being deployed within the overall diagnosis process

关键词： Engines Fault diagnosis Grid computing Project management Collaborative work Data analysis computerized monitoring control systems Systems engineering and theory Data systems

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Motion compression applied to guidance of a mobile teleoperator

Motion compression applied to guidance of a mobile teleopera...

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2005 IEEE/RSJ International Conference on Intelligent Robots and Systems

作者： P. Robler F. Beutler U.D. Hanebeck N. Nitzsche Intelligent Sensor-Actuator-Systems Laboratory Institute of Computer Science and Engineering Universitat Karlsruhe Karlsruhe Germany Institute of Automatic Control Engineering Technische Universität München Munich Germany

Telepresence aims at giving a human user the impression of being present in a remote environment. However, the user is actually situated in a user environment and his motion is tracked. A mobile teleoperator in the remote environment replicates this motion. The user can thus control the mobile teleoperator's locomotion by walking. A stereo-camera system mounted on the mobile teleoperator constantly records live camera images and transfers them to the user environment, where they are presented to the user on a head-mounted display. This paper presents a long distance experiment, in which a mobile teleoperator was controlled over a standard Internet connection by natural locomotion. Without further processing of the user's motion data, however, only exploration of a remote environment of the same size or smaller than the user environment is possible. As this is not desirable, we use motion compression, an optimal nonlinear transformation of the user's path. This algorithm allows controlling free motion in an arbitrarily large target environment from a limited user environment.

关键词： Teleoperators

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IMPROVEMENT OF FAULT DETECTION METHOD FOR NONLINEAR BLACK-BOX SYSTEMS BASED ON MULTI-FORM QUASI-ARMAX MODELING

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IFAC Proceedings Volumes 2005年第1期38卷 101-106页

作者： K. Kumamaru K. Inoue F. Tsubouchi T. Söderström 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

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.

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

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