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World Congress on Intelligent control and Automation (WCICA)

作者： Shihua Wang Bugong Xu Qingyang Wang Yun-Hui Liu Laboratory of Real-Time Control through Internet and Fieldbuses College of Automation Science and Engineering South China University of Technology Guangzhou China Department of Automation and Computer Aided Engineering Chinese University of Hong Kong New Territories Hong Kong China

Smith predictor is very sensitive to uncertain system with variable time-delay. Using dual-locus diagram method, we first analyse the essence of Smith predictor's sensitivity and present a proposition to illustrate the system stability criteria with relation to system gain and time-delay variation. Then a new modified Smith predictor is proposed to compensate the variable time-delay system with uncertain model for set-point tracking. After that, we discuss the system internal stability and give two-degree freedom controller self-adaptive to eliminate the impact of system uncertainty with varying time-delay. Examples show the improved performance compared to previous modified Smith predictor structures

关键词： Process control Uncertainty automatic control control systems Uncertain systems Feedback loop Tuning Automation Delay systems Robustness

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Complete Kernel Fisher discriminant analysis of Gabor features with fractional power polynomial models for face recognition

Complete Kernel Fisher discriminant analysis of Gabor featur...

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IEEE International Symposium on Circuits and Systems (ISCAS)

作者： Jun-Bao Li Jeng-Shyang Pan Zhe-Ming Lu Jung-Chou Harry Chang Department of Automatic Test and Control Harbin Institute of Technology Harbin China Department of Electronic Engineering National Kaohsiung University of Applied Sciences Kaohsiung Taiwan Institute for Computer Science University of Freiburg Freiburg im Breisgau Germany Division of Research and Development Viswis Inc. Taipei Taiwan

This paper presents a novel face recognition method based on complete Kernel Fisher discriminant (CKFD) analysis of Gabor features with power polynomial models. By integrating the Gabor wavelet representation of face images and the enhanced powerful discriminator named CKFD analysis, the method is robust to changes in illumination and facial expressions and poses. On the other hand, the extended polynomial Kernels, namely fractional power polynomial (FPP) models, are employed in CKFD analysis, which enhance face recognition performance. Comparing with existing PCA, LDA, KPCA, KFD and CKFD methods, the proposed method gives superior results in the ORL and Yale face databases. Its good performance in the two face databases gives the promising idea to solve the pose, illumination, and expression (PIE) problem of face recognition

关键词： Kernel Polynomials Face recognition Lighting Databases Wavelet analysis Image analysis Robustness Performance analysis Principal component analysis

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Fabrication and characterization of GaAs/AlGaAs planar resonant tunneling transistor

Fabrication and characterization of GaAs/AlGaAs planar reson...

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IEEE Nanotechnology Materials and Devices Conference (NMDC)

作者： SeungHun Son JungIl Lee YongJu Park YunSeop Yu SungWoo Hwang Doyal Ahn Departmentof Electronics & Computer Engineering Korea University Seoul South Korea Semiconductor Materials Laboratory Nano Device Research Center Korea Institute of Science and Technology Seoul South Korea Department of Information & Control Engineering Hankyong National University Anseong Gyeonggi South Korea Institute of Quantum Information Processing & Systems University of Seoul Seoul South Korea

We have demonstrated electron transport in enhancement mode in-plane-gate (IPG) quantum dot (QD) transistors. A deep etched trench allows a large positive bias on the IPG, with negligible leakage current. Such enhancement mode operation has made it possible to populate ultra-small QDs with electrons. Strong NDR peaks and SET are observed in a wide gate bias window. The position of the NDR peaks systematically moves with the change of gate bias until, and also after the SET regime is reached. The size of the QD is estimated from the SET data, giving quantum energy level spacing consistent with the evolved NDR positions.

关键词： Fabrication Gallium arsenide Resonant tunneling devices Capacitance Quantum computing Electrons Etching Transistors Quantum dots Energy states

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Method of edge detection based on fuzzy entropy and FKCN

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Jisuanji Xuebao/Chinese Journal of computers 2006年第4期29卷 664-669页

作者： Wang, Bao-Ping Liu, Sheng-Hu Zhang, Jia-Tian Zhang, Yan-Ning Fan, Jiu-Lun School of Electronics Engineering Xi'an Shiyou University Xi'an 710065 China Laboratory of Special Technology Northwestern Polytechnic University Xi'an 710072 China Department of Computer Science and Engineering Northwestern Polytechnic University Xi'an 710072 China Department of Information and Control Xi'an Institute of Post and Telecommunications Xi'an 710061 China

The three natural characters of image edge are that the gray intensity distribution in neighborhood of image is ordered, directive, and structurized. Through quoting fuzzy entropy, the authors construct three information measures fuzzy entropy-based to describe the natural characters of image edge. Three component vectors for describing three natural characters of image edge are gotten via trained image samples. Firstly, a fuzzy Kohonen clustering network (FKCN) is trained with some feature vector consist of the three component vectors, and then the edge points in a new image are directly extracted by using the trained FKCN. The method does not need any threshold;more sensitive for weak edge detection;has better anti-noise performance since the influence of noise is adequately considered when the feature vector is selected.

关键词： Edge detection

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Fast DCT-I, DCT-III, and DCT-IV via Moments

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Eurasip Journal on Applied Signal Processing 2005年第12期2005卷 1902-1909页

作者： Liu, J.G. Liu, Y.Z. Wang, G.Y. Key Laboratory of Education Huazhong University of Science and Technology Ministry for Image Processing and Intelligence Control Wuhan 430074 China Department of Computer Science and Engineering China University of Geosciences Wuhan 430074 China Key Laboratory of State Education Ministry for Image Processing and Intelligent Control Huazhong University of Science and Technology China Institute of Pattern Recognition and Artificial Intelligence Huazhong University of Science and Technology China

This paper presents a novel approach to compute DCT-I, DCT-III, and DCT-IV. By using a modular mapping and truncating, DCTs are approximated by linear sums of discrete moments computed fast only through additions. This enables us to use computational techniques developed for computing moments to compute DCTs efficiently. We demonstrate this by applying our earlier systolic solution to this problem. The method can also be applied to multidimensional DCTs as well as their inverses. © 2005 Hindawi Publishing Corporation.

关键词： Method of moments

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A Local Image Interpolation Method Based On Gradient Analysis

A Local Image Interpolation Method Based On Gradient Analysi...

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2005 International Conference on Neural Networks and Brain(ICNN&B’05)

作者： Tian Yan Liu Bin Li Tao Department of electronic and information engineering Huazhong University of Science & Technology School of computer science and technology Huazhong University of Science & Technology Key Laboratory of Education Ministry for Image Processing and Intelligent Control Huazhong University of Science & Technology

ISBN: (纸本)0780394224

Image interpolation has been widely used and studied in the fields of image *** the different complexities along the different directions,a novel image interpolation method based on gradient analysis is presented in this ***,for each point that need to be interpolated,it's the gradient values along the horizontal and vertical directions are estimated ***,different interpolation methods are carried out along these two directions according to the gradient values,that is a higher order interpolation method is applied if the gradient value is greater than certain threshold;otherwise,a lower order interpolation method is *** method gives an attention to the precision and complexity of interpolation procedure. Experimental results show that the proposed method is feasible and promising.

关键词： Gradient image interpolation root mean square error

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Robust load-sharing control of spacecraft formations

Robust load-sharing control of spacecraft formations

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作者： Garcia-Sanz, M. Hadaegh, F.Y. 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 United States

ISBN: (纸本)008045108X

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. Copyright © 2005 IFAC.

关键词： Spacecraft

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Abstracts from the 6th International Conference on the engineering of Sport, 10-14 July 2006, Olympic Hall, Munich, Germany Abstracts

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SPORTS engineering 2006年第2期9卷 107-127页

作者： [Anonymous] University of Massachusetts Lowell USA Science & Mathematics Department Kettering University Flint USA University of Illinois USA Western Michigan University USA Washington State University USA Casecade Engine USA Kanazawa University Japan Sumitomo Light Metal Japan Massachusetts Institute of Technology USA Nanyang Technological University Bioengineering Singapore University of Vienna Anthropology Austria Department of Mechanical Engineering University of Bath UK INSA Lyon France PETZL France Sports Materials Research Group University of Birmingham UK Laboratoire de Modélisation des Activités Sportives Bourget du Lac France Technical University Kaiserslautern Germany Department of Engineering Mechanics United States Air Force Academy Colorado Springs USA SRAM Corporation Colorado Springs USA Sports Engineering Research Group University of Sheffield UK Sports Engineering CSES Sheffield Hallam University USA Sports Engineering CSES Sheffield Hallam University UK Technische Universität München Germany Rush University Medical Center Chicago USA Faculty of Sports Science Department of Sport Equipment & Materials TU München Germany RMIT University Australia Institute of Health and Sports Sciences University of Tsukuba Ibaraki Japan Machine and Control Department Polytechnic University Kanagawa Japan SRI Sports Ltd. Hyogo Japan SRI Research and Development Ltd. Hyogo Japan Mizuno Corporation Osaka Japan Fukuoka Institute of Technology Fukuoka Japan University of Limerick Éire Graduate School of Engineering Hokkaido University Japan Faculty of Engineering Kitami Institute of Technology Japan University of Calgary Canada TaylorMade-adidas Golf Company USA Davis Mechanical Engineering University of California USA Davis Mechanical & Aeronautical Engineering University of California USA University of Wales Institute Cardiff Cardiff School of Sport UWIC Cardiff Cardiff School of Sport UWIC Wales Loughborough University UK Cranfield University UK Cr

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The system reliability analysis based on the relation of fuzzy infection

The system reliability analysis based on the relation of fuz...

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5th International Conference on control and Automation, ICCA'05

作者： Sun, Chuan Wang, Yongji Zhu, Xiangou Dept. of Mechanic and Dynamic Engineering HuangShi Polytechnic College 435003 HuangShi HuBei China Dept. of Automatic Control Huazhong University of Science and Technology 430074 Wuhan HuBei China College of Computer Science and Engineering WenZhou University 325027 WenZhou ZheJiang China

ISBN: (纸本)0780391381

In this paper, using the fuzzy theory and gray theory, a concept of the degree of fuzzy infection and a new reliability analysis method based on the relation of fuzzy infection were proposed, and the mathematical mode of series connection and parallel connection system was first set up and their rationalities were proven. An illustrational example was given to demonstrate the effectiveness of this theory. © 2005 IEEE.

关键词： System stability

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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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