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International Conference on Intelligent Information Hiding and Multimedia Signal Processing (IIHMSP)

作者： Chuang Lin Jeng-shyang Pan Chin-shiuh Shieh Peng Shi Department of Automatic Test and Control Harbin Institute of Technology Harbin China Department of Electronic Engineering National Kaohsiung University of Applied Sciences Kaohsiung Taiwan Department of School of Technology University of Glamorgan UK

The traditional information hiding schemes embed the information into the image, audio and video etc, for the purposes of copyright protection, authentication, and authorized access control etc. In this paper, we propose to embed the data into the physical layer of the baseband Orthogonal Frequency Division Multiplexing (OFDM) wireless networks. We test the information hiding scheme in an additive white Gaussian noise (AWGN) channel. The experimental results indicate that when the number of carriers is limited and the channel SNR is high enough, the proposed information hiding scheme can work effectively, while the OFDM system can also work well as it used to be.

关键词： OFDM Wireless networks AWGN Copyright protection Authentication Access control Physical layer Baseband Testing Additive white noise

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Novel high-speed photopolarimeter based on a metallic grating

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Journal of Physics: Conference Series 2006年第1期48卷 1003-1007页

作者： Du, X.L. Dai, J.M. Sun, X.G. Department of Automatic Measurement and Control Harbin Institute of Technology Harbin 150001 China College of Electronic Engineering Heilongjiang University Harbin 150080 China

A novel high-speed photopolarimeter is presented in this paper, which is composed by the optical system, electronics system and PC. This instrument uses a metallic grating that can produce both reflective diffraction and transmission diffraction as a beam splitter to divide the incident light into many components, and the light fluxes of the four 1st order diffracted beams are converted linearly into four electrical signals by four photodiodes. After going through a signal conditioning circuit, these electrical signals are converted into digital values by high-speed A/D converters that can implement synchronous multi-channels sampling, and then the data sampled are high-speedily transmitted into the PC via a USB2.0 interface. The electrical signal vector I composed by the four electrical signals possesses the linear relationship with the incident light Stokes vector S. The nonsingular instrument matrix A of this instrument can be obtained by the calibration, and then the unknown Stokes vector S of the incidence light can be obtained from the equation S A^-1I. The testing results show that the mean deviations of the measured Stokes parameters compared with the predicted values are less than 1% at 632.8nm. It is compact and easy to be installed, and can be used as a polarization state detector in real-time polarimetry and ellipsometry. © 2006 IOP Publishing Ltd.

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An Efficient Reformative Kernel Discriminant Analysis for Face Recognition

An Efficient Reformative Kernel Discriminant Analysis for Fa...

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IEEE International Conference on Robotics and Biomimetics

作者： Jun-Bao Li Jeng-Shyang Pan Zhe-Ming Lu Department ofAutomatic Test and Control Harbin Institute of Technology Harbin China Department ofElectronic Engineering National Kaohsiung University of Applied Sciences Kaohsiung Taiwan Visual Information Analysis and Processing Research Center Harbin Institute of Technology Shenzhen China

An efficient reformative kernel discriminant analysis, namely enhanced kernel discriminant analysis (EKDA), is proposed in this paper. In the proposed algorithm, a novel criterion, i.e., maximizing the class separability both in the feature space and in the projection subspace, is presented to enhance the discriminant power of KDA. EKDA is more adaptive to the input data under the novel criterion compared with KDA, which enhances the performance of EKDA. Experiments conducted on the Yale and ORL face databases give the higher recognition performance compared with KDA.

关键词： Kernel Face recognition Linear discriminant analysis Information analysis Space technology Robots Biomimetics Testing Spatial databases Equations

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Discrete-time sliding mode observer design for a class of uncertain nonlinear systems

Discrete-time sliding mode observer design for a class of un...

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American control Conference (ACC)

作者： K.C. Veluvolu Y.C. Soh W. Cao Z.Y. Liu School of EEE Block S2 Nanyang Technological University Singapore Department of Control Science and Engineering Harbin Institute of Technology China

In this paper, we design a discrete-time sliding mode (DSM) nonlinear observer for a class of nonlinear uncertain systems. Taylor series expansion together with a nonlinear state transformation is used to discretize the system. A strategy to avoid switching across the sliding manifold is employed, and the sliding trajectory is confined to a boundary layer once it converges to the sliding manifold. We call this phenomenon DSM. The conditions for existence of DSM are derived. The condition for the asymptotical stability of the estimation error is analyzed. An application to a bioprocess is given and the simulation results demonstrate the effectiveness of the proposed scheme

关键词： Nonlinear systems Sliding mode control Uncertain systems Estimation error Uncertainty Linear systems Nonlinear control systems control systems Taylor series Stability analysis

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New repetitive adaptive friction compensation scheme in high-precise servo system

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Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) 2006年第SUPPL.期36卷 74-78页

作者： Yang, Song Zeng, Ming Su, Baoku Department of Control Science and Engineering Harbin Institute of Technology Harbin 150001 China

A new repetitive adaptive compensation scheme is proposed for the dynamic friction and periodic ripple moment in a DC (direct current) motor system. The repetitive control scheme is added into the adaptive-based compensation scheme. A LuGre dynamic friction model with non-uniform variation parameters is used in the motor system. The compensation algorithm consists of a PD (proportion differential) component, an adaptive component and a repetitive component. The adaptive component is used to estimate and compensate for unknown model parameters, while the induced repetitive controller is motivated by the attempt to improve the system motion trajectory tracking performance. The system stability and the uniform ultimate position tracking performance are guaranteed by utilizing the Lyapunov method. Finally, computer simulations verify the effectiveness of the proposed scheme for the high-precision servo system.

关键词： Servomechanisms

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A Subsampling and Quantization Based Watermarking Scheme Resisted the Permutation Attacking

A Subsampling and Quantization Based Watermarking Scheme Res...

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International Conference on Intelligent Information Hiding and Multimedia Signal Processing (IIHMSP)

作者： Chia An Huang Jeng-shyang Pan Te-hui Kuo Jaw-shyang Wu Chuang Lin Department of Electronic Engineering National Kaohsiung University of Applied Sciences Kaohsiung Taiwan Department of Electrical Engineering Cheng Shiu University Kaohsiung Taiwan Department of Automatic Test and Control Harbin Institute of Technology Harbin China

The paper proposed a subsampling and quantization based watermarking scheme to resist the permutation attack. The subsampling based watermarking schemes have drawn great attention for its convenience and effectiveness recently, but this kind of watermarking schemes is very vulnerable to the permutation attack. In this paper, the watermark information is embedded into the average values of the 3-level DWT coefficients to resist the permutation attack. Experimental results show that the proposed scheme can resist not only the permutation attack but also some common image processing attacks.

关键词： Quantization Watermarking Discrete wavelet transforms Discrete cosine transforms Resists Image processing Data mining Electronic equipment testing Automatic testing Automatic control

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A Subsampling and PSK Based Watermarking Scheme Resisted the Permutation Attacking

A Subsampling and PSK Based Watermarking Scheme Resisted the...

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International Conference on Intelligent Information Hiding and Multimedia Signal Processing (IIHMSP)

作者： Chuang Lin Jeng-shyang Pan Chin-shiuh Shieh Ping-sung Liao Department of Automatic Test and Control Harbin Institute of Technology Harbin China Department of Electronic Engineering National Kaohsiung University of Applied Sciences Kaohsiung Taiwan Department of Electrical Engineering Cheng Shiu University Kaohsiung Taiwan

The paper describes a subsampling and PSK (Phase Shift Keying) based watermarking scheme which can resist the permutation attacking. In recent years, a series of subsampling based watermarking schemes have been proposed, but in 2005, Lu etc. proposed a permutation attacking algorithm which can effectively destroy this kind of subsampling based watermarking schemes. In this paper, we proposed a subsampling and PSK based watermarking scheme which can resist the permutation attacking. In our method, the watermark information is embedded into the average values of the phase of the DFT coefficients which are in the different subimages. Experimental results show that our scheme can resist the permutation attacking effectively, and it can also resist some common signal processing attacking successfully.

关键词： Phase shift keying Watermarking Resists Discrete cosine transforms Signal processing algorithms Electronic equipment testing Automatic testing Automatic control Paper technology Linear systems

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A New Model for Time-delay Systems with Application to Network Based control

A New Model for Time-delay Systems with Application to Netwo...

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Chinese control Conference (CCC)

作者： Huijun Gao Tongwen Chen James Lam Space Control and Inertial Technology Research Center Harbin Institute of Technology Harbin China Department of Electrical and Computer Engineering University of Alberta Edmonton AB Canada Department of Mechanical Engineering University of Hong Kong Hong Kong China

This paper proposes a new model for time-delay systems, which contains multiple successive delay components in the state and has important applications in remote control and network based control. New results on stability and H ∞ performance are obtained for systems with two successive delay components. The second part of this paper applies the proposed new model to network based control, which has emerged as a topic of significant interest in the control community. A sampled-data networked control system with simultaneous consideration of network induced delays, data packet dropouts and measurement quantization is modelled as a time-delay system with two successive delay components in the state and, the problem of network based H ∞ control is solved accordingly.

关键词： Stability Space technology Delay effects Delay systems Application software Networked control systems Quantization Differential equations Solid modeling Mechanical engineering

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Data-Dependent Kernel Discriminant Analysis for Feature Extraction and Classification

Data-Dependent Kernel Discriminant Analysis for Feature Extr...

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International Conference on Information and Automation (ICIA)

作者： Jun-bao Li Jeng-shyang Pan Zhe-ming Lu Bin-yih Liao Department of Automatic Test and Control Harbin Institute of Technology Harbin China Department of Electronic Engineering National Kaohsiung University of Applied Sciences Kaohsiung Taiwan Visual Information Analysis and Processing Research Center Harbin Institute of Technology Shenzhen Graduate School Shenzhen China

Subspace analysis is an effective technique for feature extraction, which aims at finding a low-dimensional space of high-dimensional data. In this paper, a novel subspace analysis method based on data-dependent kernel discriminant analysis (DDKDA) is proposed for dimension reduction. The procedure of DDKDA contains two stages: one is to find the optimal combination coefficients by solving a constrained optimization function which transformed to an eigenvalue problem; other is to implement KDA under the optimal data-dependent kernel with Fisher criterion. DDKDA is more adaptive to the input data than KDA owing to the optimization of projection from input space to feature space with the data-dependent kernel, which enhances the performance of KDA. Experiments on the ORL and Yale face databases demonstrate the good performance of the proposed algorithm

关键词： Kernel Data analysis Feature extraction Performance analysis Algorithm design and analysis Constraint optimization Eigenvalues and eigenfunctions Information analysis Space technology Spatial databases

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High precision location algorithm for optical feature of vision measurement

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Journal of Physics: Conference Series 2006年第1期48卷 474-478页

作者： Liu, C.Y. Che, R.S. Gao, Y.H. College of Instrumentation and Electrical Engineering Jilin University Changchun 130001 China Department of Automation Measurement and Control Harbin Institute of Technology Harbin 150001 China

To meet the requirement for precision location of optical feature in the vision coordinates measurement system based on optical features imaging, the Gauss distribution multi-fitting location algorithm based on bilinear interpolation was presented in the paper. The method fit the grey distribution of optical feature imaging by Gauss distribution function, and the mathematics model was constructed on grey value of pixel points in the object image, coordinates location and centre of optical feature using the grey value height relativity among the pixels points in the feature image and the location of feature was estimated precisely. In the same, the bilinear interpolation algorithm and multi-fitting method were used to improve the location precision of the location algorithm presented. Finally, the experiment results show that the standard deviation is 0.0055 pixels and the repeatability is less than 0.011 pixels and prove the method holds good location precision and can locate for optical feature precisely. © 2006 IOP Publishing Ltd.

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