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9th International Conference on Knowledge-Based Intelligent Information and engineering Systems, KES 2005

作者： Yan, Bin Lu, Zhe-Ming Sun, Sheng-He Pan, Jeng-Shyang Department of Automatic Test and Control Harbin Institute of Technology P. O. Box 339 150001 Harbin China Department of Electronic Engineering National Kaohsiung University of Applied Sciences 415 Chien-Kung Road Kaohsiung 807 Taiwan

ISBN: (纸本)3540288961

This paper proposes a semi-fragile speech watermarking scheme by quantization of Linear Prediction (LP) parameters, i.e. the inverse sine parameters. The watermark decoding performance is analyzed by modelling the parameters estimation error as Laplace distributed noises. The watermark detection threshold is derived according to the requirement of error probability and expected Signal to Noise Ratio (SNR). Experiments show that the proposed watermarking scheme is robust against amplitude scaling and semi-fragile to white noise addition, and thus suitable for speech authentication. © Springer-Verlag Berlin Heidelberg 2005.

关键词： Speech recognition

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Novel iris recognition method

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Guangdian Gongcheng/Opto-Electronic engineering 2005年第5期32卷 89-92页

作者： Zhang, Peng-Fei Li, De-Sheng Wang, Qi Department of Automation Measurement and Control Harbin Institute of Technology Harbin 150001 China College of Mechanical Engineering and Applied Electronic Technol. Beijing University of Technology Beijing 100022 China

A novel iris recognition method based on multi-texture feature fusion is presented in the paper. The extraction of the texture features with different resolutions in different directions are carried out by performing Gabor wavelet transform for iris image and the extracted features are used as global features of iris. The local features of iris are extracted by applying gray scale level Co-Occurrence Matrix (COM) to the filtered sub-window image. The global features and local features will be recognized and sorted by weighting Euclidean distance and the minimum distance, respectively. A sorting method with Fuzzy Inference System (FIS) feature fusion is designed to improve the robustness of iris recognition. Experimental results show that the method is effective and feasible with recognition ratio up to 98.5%, False Acceptance Rates (FAR) lower than 0.1% while False Rejection Rates (FRR) keeping 1.4%.

关键词： Feature extraction Feature fusion Image preprocessing Iris recognition

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On poles and zeros of input-output and chain-scattering systems

On poles and zeros of input-output and chain-scattering syst...

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作者： Zhang, Guangying Lanzon, Alexander Department of Control Science and Engineering Harbin Institute of Technology Harbin 150001 China Research School of Information Sciences and Engineering Australian National University Canberra ACT 0200 Australia National ICT Australia Ltd. Locked Bag 8001 Canberra ACT 2601 Australia

ISBN: (纸本)008045108X

A system is frequently represented by transfer functions in an input- output characterization. However, such a system (under mild assumptions) can also be represented by transfer functions in a port characterization, frequently referred to as a chain-scattering representation. Due to its cascade properties, the chain-scattering representation is used throughout many fields of engineering. This paper studies the relationship between poles and zeros of input-output and chain-scattering representations of the same plant. Copyright © 2005 IFAC.

关键词： Chains

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Algorithm for circle subpixel location detecting based on point Hough transformation

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Guangxue Jishu/Optical Technique 2005年第SUPPL.期31卷 155-157页

作者： Chen, Shi-Zhe Pu, Zhao-Bang Liu, Guo-Dong Hu, Tao Qu, Yu-Fu Department of Automatic Measurement and Control Harbin Institute of Technology Harbin 150001 China School of Instrument Science and Photoelectric Engineering Beijing University of Aeronautics and Astronautics Beijing 100083 China

In order to improve location precision and speed of base circle in PCB (Printed Circuit Board) detecting, an algorithm for circle subpixel location detection was presented. At first, the edge points could be obtained from edge detecting the filtered image using canny operator, then the circle approximately position and its parameter could be gained through dealing with the edge points using point Hough transformation;secondly, the circle's edge points could be got through deleting big noise points according to the circle's parameter, then the circle's subpixel edge points could be obtained from subdividing the circle's edge points;finally the circle's precision location and its parameter could be obtained through fitting the circle's subpixel edge points using least square method. The experiments demonstrate that this algorithm can detect the base circle's subpixel location and its parameter. The center location precision is up to 0.5 pixel, and the radius detection precision is up to 0.3 pixel, and the speed is very high.

关键词： Circle detection Location PCB Point Hough transformation Subpixel

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Discrete chaotic circuit and the property analysis of output sequence

Discrete chaotic circuit and the property analysis of output...

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International Symposium on Communications and Information Technologies (ISCIT)

作者： Qun Ding Yong Zhu Fangyi Zhang Xiyuan Peng Department of Automatic Test and Control Harbin Institute of Technology Harbin China School of Electronic Engineering Heilongjiang University Harbin China

1-D logistic chaotic sequence circuit is designed and achieved by FPGA technology, the chaotic sequence has good random property and correlation. The design of the circuit is simple, novel and has high portability. It can achieve the function from chaotic equation to random sequence's output. According to the idea, we can design n-D discrete chaotic sequences circuit. The circuit is used in practical secure communication and information security systems.

关键词： Chaos Chaotic communication Field programmable gate arrays Logistics Digital signal processing Information security Circuit testing Nonlinear equations Integrated circuit technology Binary sequences

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H∞ Full Information control of Discrete-time Systems with Multiple Input Delays

H∞ Full Information Control of Discrete-time Systems with M...

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IEEE Conference on Decision and control

作者： Huanshui Zhang Lihua Xie Guangren Duan Shenzhen Graduate School Harbin Institute of Technology Shenzhen University Shenzhen China School of Electrical and Electronic Engineering Nanyang Technological University Singapore Center for Control Theory and Guidance Technology Harbin Institute of Technology Harbin China

ISBN: (纸本)0780395670

In this paper, we present an explicit solution to H ∞ full-information control for discrete-time systems with multiple input delays. Our solution is given in terms of one standard Riccati difference equation of the same order as the plant under investigation. Thus, it has much computational advantage over methods such as system augmentation. As special cases, solutions to the H ∞ control problem for systems with single input delay and the H ∞ preview control are obtained.

关键词： control systems Space technology Delay systems Riccati equations Difference equations Time varying systems Networked control systems Computational efficiency State feedback Output feedback

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Observer with multiple sliding modes for a class of nonlinear uncertain systems

Observer with multiple sliding modes for a class of nonlinea...

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American control Conference (ACC)

作者： K.C. Veluvolu Y.C. Soh W. Cao Z.Y. Liu School of EEE Nanyang Technological University Singapore Department of Control Science and Engineering Harbin Institute of Technology China

Sliding mode observer design for a class of nonlinear uncertain systems is systematically developed in this paper. The observer is designed under less conservative conditions than existing sliding mode observers that are based on equivalent control concept. A methodology to select suitable transformation is formulated, and it divides the original system into three interconnected subsystems. Multiple sliding modes are then introduced to compensate for multiple disturbance terms in the subsystems by appending them to constant gain observer. The conditions for asymptotic stability of estimation error dynamics have been derived based on Lipschitz assumptions for nonlinear functions by standard Lyapunov analysis. Finally, simulation results are given to demonstrate the effectiveness of the proposed method.

关键词： Uncertain systems Observers Sliding mode control Nonlinear systems control systems State estimation Uncertainty Space technology Nonlinear control systems Asymptotic stability

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A combined SOC estimation method under varied ambient temperature for a lead-acid battery

A combined SOC estimation method under varied ambient temper...

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Annual IEEE Conference on Applied Power Electronics Conference and Exposition (APEC)

作者： M. Coleman C.B. Zhu C.K. Lee W.G. Hurley Power Electronics Research Centre National University of Ireland Galway Ireland Department of Automation Measurement and Control Engineering Harbin Institute of Technology Harbin China

This paper describes a practical ambient temperature dependant battery state of charge (SOC) estimation algorithm that can determine the SOC of a battery operating under load conditions. SOC is an essential parameter in a monitoring system, which is the basis of a battery management system (BMS). Temperature has a profound effect on the actual capacity or SOC of the battery. The proposed model in this paper determines the SOC by incorporating the changes occurring to charge acceptance, power deliverable and internal resistance due to the variations in temperature.

关键词： Temperature dependence Equivalent circuits Voltage Chemicals Power system modeling Power electronics Automation Battery charge measurement Power measurement Power engineering and energy

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Linear quadratic regulation for linear time-varying systems with multiple input delays part I: discrete-time case

Linear quadratic regulation for linear time-varying systems ...

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International Conference on control and Automation (ICCA)

作者： Huanshui Zhang Guangren Duan Lihua Xie Shenzhen Graduate School of Harbin Institute of Technology HIT Campus Shenzhen University Shenzhen China Center for Control Theory and Guidance Technology Harbin Institute of Technology Harbin China BLK S2 School of Electrical and Electronic Engineering Nanyang Technological University Singapore

Although the problem of linear quadratic regulation has been well studied for discrete linear systems without delays or with only a single input delay in the past decades, the same problem for systems with multiple input delays remains to be solved. This paper aims to present a complete solution to the LQR problem for systems with multiple input delays. It shall be shown that the problem is dual to that of fixed-lag smoothing for a backward system without involving delays. Thus, the optimal LQR controller can be obtained by computing the gain matrices of the standard fixed-lag smoothing. An explicit solution for the LQR problem is given in terms of the solution of a Riccati difference equation.

关键词： Time varying systems Computer aided software engineering Smoothing methods Delay systems control systems Optimal control Riccati equations Difference equations Linear systems Communication system control

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Contour extraction of a moving vehicle in visible images based on image fusion

Contour extraction of a moving vehicle in visible images bas...

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International Conference on Machine Learning and Cybernetics (ICMLC)

作者： Peng Zhao Ni-Hong Wang Zhao-Bang Pu Department of Automation Measurement and Control Harbin Institute of Technology Haerbin China Information and Computer Engineering Institute North East Forestry University Haerbin China

Infrared (IR) and visible images are commonly used in the detection and tracking of a moving target. A novel contour extraction scheme for a moving vehicle is proposed in this paper. Firstly, a motion segmentation technology is applied to get an initial contour. Secondly, a dynamic contour is applied to represent the initial contour and then converges to the target's contour. Lastly, a novel image fusion is proposed, which minimizes the B-spline norm's square of control point vector's difference in two modal images. Image registration is not required. The experiment indicates that for visible images, average contour extraction error decreases by 58.14% after the fusion. Moreover, a fast iteration algorithm of dynamic contour based on the Newmark algorithm is devised. This image fusion is implemented only with control point vectors and is suitable for real-time processing.

关键词： Image fusion Infrared detectors Vehicle dynamics Infrared imaging Target tracking Motion segmentation Computer vision Image converters Spline Image registration

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