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2010 8th IEEE International Conference on control and Automation, ICCA 2010

作者： Pai, Wang Guo, Baolong Li, Nan Institute of Intelligent Control and Image Engineering Xidian University Xi'an 710071 China

ISBN: (纸本)9781424451951

3D simulation of ERT sensor is established with multi-physical coupling software COMSOL and MATLAB7.0, analyze the limitation of ERT system 3D sensor field and deeply study the influence on the established fields by sizes of electrodes and frequency characteristics. Thus, design two kinds of sensors of pointed electrode array and rectangular-shaped electrode array and also carry out comparison test on frequency characteristics during the detection of milk flows. The result shows that increasing width and height of electrodes is favorable for improving uniformity of sensitivity field in a radial and axial distributions. It also shows that increasing area of electrodes can reduce "Contact resistance" and have more stable frequency characteristic, which is good for increasing SNR of ERT system, thereby, providing evidence and convenience for optimization design of sensors and reconstruction of images. © 2010 IEEE.

关键词： Electrodes

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RST invariant image watermarking based on invariant contents

RST invariant image watermarking based on invariant contents

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International Conference on Genetic and Evolutionary Computing (ICGEC)

作者： Li, Xin-Wei Guo, Bao-Long Chen, Long Institute of Intelligent Control and Image Engineering Xidian University Xi'an 710071 China

ISBN: (纸本)9780769542812

An image watermarking scheme resisting RST (rotation, scaling, translation) based on RST invariant square region is proposed in the paper. Two SIFT (scale-invariant feature transform) feature points are selected to determine the position, size, direction of the region. The watermark embedding and detection is completed in the square region with quantization, which could guarantee blind detection. A binary image is employed to be the watermark due to the improvement of watermark capacity. Experimental results show that the proposed scheme can effectively resistant geometrical attacks as well as common signal processing. © 2010 IEEE.

关键词： image watermarking

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Structured mean shift method and its application on image segmentation

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Journal of Theoretical and Applied Information Technology 2012年第2期44卷 271-277页

作者： Xiao, Weichu Guo, Baolong Chen, Weihong School of Communication and Electronic Engineering Hunan City University Yiyang 413002 Hunan China Institute of Intelligent Control and Image Engineering Xidian University Xi'an 710071 Shanxi China

It was found that the traditional Mean Shift algorithm segmentation often produces the connection channel, several categories between clusters can not be completely separated from the problem, an improved classification of the structured mean shift segmentation algorithm iterations to obtain the initial cluster in center on the basis of different bandwidth matrix stepwise clustering, resulting in a different class collection of cluster centers, and the establishment of a vested in the tree structure, ultimately through the attribution of the leaf nodes and the root node are classified in order to complete the image segmentation. Experiments show that the algorithm can better retain the image of local information, and has better applicability. © 2005 - 2012 JATIT & LLS. All rights reserved.

关键词： image segmentation

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Novel image retrieval method based on interest points

Novel image retrieval method based on interest points

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2010 3rd International Congress on image and Signal Processing, CISP 2010

作者： Meng, Fanjie Guo, Baolong Fang, Yiqi Institute of Intelligent Control and Image Engineering Xidian University Xi'an China Xi'an Electronic Engineering Research Institute Xi'an China

ISBN: (纸本)9781424465149

Traditional interest points based image retrieval methods employed local features of interest points to describe image. The difference between local areas of interest points and the region of interest limited the retrieval accuracy. Considering the shape characteristic of interest points, this paper presented a new image retrieval method based on region of interest determined by interest points. Firstly, interest points were detected by tracking wavelet coefficients of different scales. Secondly, the convex hull of interest points was calculated to extract the region of interest in the image. Then color and shape features of the region were used to describe an image. Finally, the weighted feature distance was used to define the similarity between two images. With robustness to image rotation, translation and scale, the method makes the retrieval implementation at the object level and avoids the shortcoming of traditional methods. Lots of experiments based on an image database containing 1100 images show that the method improves the average retrieval precision over 11.1 percent, compared with other interest points based retrieval methods. ©2010 IEEE.

关键词： image retrieval

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Analytical algorithm of program quaternion in the arbitrary spacecraft attitude-adjusting control

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Journal of Information and Computational Science 2012年第3期9卷 751-759页

作者： Ni, Shaobo Wu, Jianwu Liu, Lei Wang, Yongji Shan, Jiayuan Su, Mao School of Aerospace Engineering Beijing Institute of Technology Beijing 100081 China Beijing Aerospace Automatic Control Institute Beijing 100854 China Key Laboratory of Education Ministry for Image Processing and Intelligent Control Department of Control Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China

The analytical algorithm of program quaternion is studied, aiming at the problem of the arbitrary space vehicle attitude-adjusting control. The analytical constructor method of the program quaternion is provided for arbitrary given initial quaternion, initial angle velocity, terminal quaternion and terminal angle velocity. The presented method has advantages as: good adaptability, the initial and terminal conditions are both arbitrary;reduced operation, the calculation process involves the fundamental algebraic operation;direct optimization, the time consumption in the process of space vehicle attitude adjustment and the maximum angular velocity can be optimized directly by using the program quaternion model. Finally, according to the simulation results, the program quaternion tracking can be realized by a PD control law. © 2012 Binary Information Press.

关键词： Attitude control

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control design of 60kW PEMFC generation system for residential applications

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Journal of Zhejiang University-Science A(Applied Physics & engineering) 2013年第9期14卷 679-685页

作者： Ying-ying ZHANG Ying ZHANG Xi LI Guang-yi CAO Shandong Provincial Key Laboratory of Ocean Environment Monitoring Technology Institute of Oceanographic Instrumentation Shandong Academy of Sciences Control Science and Engineering Department Key Laboratory of the Ministry of Education for Image Processing and Intelligent Control Huazhong University of Science and Technology Fuel Cell Institute Department of Automation Shanghai Jiao Tong University

This paper presented a control design methodology for a proton exchange membrane fuel cell (PEMFC) generation system for residential applications. The dynamic behavior of the generation system is complex in such applications. A comprehensive control design is very important for achieving a steady system operation and efficiency. The control strategy for a 60 kW generation system was proposed and tested based on the system dynamic model. A two-variable single neuron proportional-integral (PI) decoupling controller was developed for anode pressure and humidity by adjusting the hydrogen flow and water injection. A similar controller was developed for cathode pressure and humidity by adjusting the exhaust flow and water injection. The desired oxygen excess ratio was kept by a feedback controller based on the load current. An optimal seeking controller was used to trace the unique optimal power point. Two negative feedback controllers were used to provide AC power and a suitable voltage for residential loads by a power conditioning unit. control simulation tests showed that 60 kW PEMFC generation system responded well for computer-simulated step changes in the load power demand. This control methodology for a 60 kW PEMFC generation system would be a competitive solution for system level designs such as parameter design, performance analysis, and online optimization.

关键词： Proton exchange membrane fuel cell (PEMFC) Generation system control strategy decoupling control Optimalseeking control

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Octa-log-polar Fourier transform for image registration

Octa-log-polar Fourier transform for image registration

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5th International Conference on Information Assurance and Security, IAS 2009

作者： Wu, Xian-Xiang Guo, Bao-Long Wang, Juan Institute of Intelligent Control and Image Engineering Xidian University Xi'an 710071 China Telecommunication Engineering Institute Air Force Engineering University Xi'an 710077 China

ISBN: (纸本)9780769537443

A novel image registration algorithm based on octa-log-polar Fourier transform (OLPFT) for estimating large translations, rotations, and scalings in images is presented. The OLPFT, which is calculated at points distributed at non-linear increased concentric octagons, approximated log-polar Fourier representations of images accurately. And it can be calculated fast by utilizing the Fourier separability property and fractional FFT. Using the log-polar Fourier representations and cross-power spectrum method, we can estimate the rotations and scalings in images, and obtain translations later. © 2009 IEEE.

关键词： image registration

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Bearing Remaining Useful Life Prediction Combining Trajectory Similarity and Relevance Vector Machine 41

Bearing Remaining Useful Life Prediction Combining Trajector...

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第41届中国控制会议

作者： Zhuyi Li Kesen Fan Cong Zhang Sihang Zhang Yiming Wan Key Laboratory of Image Processing and Intelligent Control Ministry of Education Chinaand School of Artificial Intelligence and AutomationHuazhong University of Science and Technology Beijing Institute of Control Engineering

ISBN: (数字)9789887581536

ISBN: (纸本)9781665482561

Bearing remaining useful life(RUL) prediction is critical for safe operation of rotating *** this paper,we propose a combined RUL prediction approach that leverages both trajectory similarity and relevance vector machine(RVM).The similarity based prediction relies on historical degradation trajectories that are highly similar to the online data,hence would perform poorly if all historical trajectories have low similarity with the online *** RVM based prediction relies solely on a regression model learned from the available online data,thus gives an inaccurate prediction when insufficient data are available in the early stage of degradation.A weighted sum of these above two predictions is proposed to address the limitation of each single prediction method,whose weights are determined by solving a non-negative least squares fitting *** further improve RUL prediction accuracy,we distinguish between fast and slow degradation modes,so that each mode uses a different set of historical degradation trajectories and kernel *** doing so,we predict RUL under the identified *** case study using the PHM2012 dataset demonstrates the effectiveness of the proposed RUL prediction approach.

关键词： Bearing degeneration remaining useful life prediction relevance vector machine trajectory similarity

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An ACO-based online routing method for multiple order pickers with congestion consideration in warehouse

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Journal of intelligent Manufacturing 2016年第2期27卷 389-408页

作者： Chen, Fangyu Wang, Hongwei Xie, Yong Qi, Chao Key Laboratory of Image Processing and Intelligent Control of Education Ministry Institute of Systems Engineering Huazhong University of Science and Technology Wuhan 430074 Hubei China

One of the challenging problems in order picking is how to deal with the congestion happens in warehouse with multiple pickers. In this paper, we consider an ant colony optimization (ACO)-based online routing method to find picking routes for multiple order pickers under nondeterministic picking time. Here, a default route is formed by ACO for each single picker. Then, we coordinate these routes to alleviate congestion by dedicated rules based on indoor positioning and information sharing technologies, during order pickers serve the picking task. Our results indicate that the proposed method can achieve a reduction in the order service time primarily by coping with the congestion. We conclude that the new method is particularly effective in multiple-block picker-to-parts warehouses. © 2014, Springer Science+Business Media New York.

关键词： Ant colony optimization Congestion Multiple order pickers Routing method Warehouse management

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Hexagon-based motion estimation algorithm using motion vector field adaptive search technique

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Jisuanji Gongcheng/Computer engineering 2005年第13期31卷 10-12+58页

作者： Ni, Wei Guo, Baolong Ding, Guiguang Institute of Intelligent Control and Image Engineering Xidian University Xi'an 710071 China

This paper proposes a fast motion estimation algorithm, or the hexagon-based motion vector field adaptive search technique (HMVFAST). In HMVFAST, the type of local motion activity and initial search center are first determined according to the motion vector field, then a new hexagon search pattern and a common diamond search pattern are adaptively used. Experimental results show that the proposed algorithm provides faster searching speed than other existing fast block-matching algorithm, while the distortion is almost the same as the FS algorithm.

关键词： BMA HMVFAST Motion estimation Video coding

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