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Real time performance improvement of electrical resistance tomography

ICIC Express Letters, Part B: Applications 2012年第4期3卷 769-776页

作者： Wang, Pai Guo, Baolong Li, Nan Institute of Intelligent Control Image Engineering Xidian University No. 2 South Taibai Rd. Xi'an 710071 China Department of Mechanical Engineering and Applied Electronics Technology Beijing University of Technology No. 100 Pingleyuan Chaoyang Dist. Beijing 10022 China

This paper puts forward a novel design for a high-speed residual potential discharge circuit that improves real time performance of an electrical resistance tomography (ERT) system. The authors' analysis of transient time effects at the electrode-electrolyte surface of a model ERT sensor used with bi-directional current pulse excitation found that a large amount of accumulated charge is produced between the excitation electrodes due to electrode polarization. This part of the residual potential is bound to produce a huge measuring noise and its attenuation speed greatly affects real time performance of the ERT system. Therefore, a novel high-speed discharge circuit is designed to eliminate measuring noise generated by the residual potential. Two simulation tests are conducted on the denoising effect of the new circuit and the results show that the circuit can effectively eliminate residual potential between excitation electrodes. The high speed discharging circuit is also used in an ERT system developed by the authors (using bi-directional current pulse excitation) for an off-line experiment case, where the system achieved a speed of 3877 frames per second. The result shows that this technology can be applied to significantly improve real-time ERT system performance. © 2012 ICIC International.

关键词： Electrodes

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An Overview of Hierarchical Temporal Memory: A New Neocortex Algorithm

An Overview of Hierarchical Temporal Memory: A New Neocortex...

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2012 International Conference on Modelling,Identification and control(建模、辨别与控制国际会议 ICMIC 2012)

作者： Xi Chen Wei Wang Wei Li Institute of System engineering Huazhong University of Science & TechnologyImage Processing and Int Candidate for Master of theInstitute of System engineering Huazhong University of Science &Technolog Department of Control Science &Engineering Image Processing and Intelligent Control Key Laboratory o

ISBN: (纸本)9781467315241

The overview presents the development and application of Hierarchical Temporal Memory (HTM).HTM is a new machine learning method which was proposed by Jeff Hawkins in *** is a biologically inspired cognitive method based on the principle of how human brain *** method invites hierarchical structure and proposes a memory-prediction framework, thus making it able to predict what will happen in the near *** overview mainly introduces the developing process of HTM, as well as its principle, characteristics, advantages and applications in vision, image processing and robots movement, some potential applications by using HTM , such as thinking process, are also put forward.

关键词： hierarchical Bayesian network spatial-temporal memory-prediction temporal sequence pattern recognition

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An overview about pinning control of complex networks

An overview about pinning control of complex networks

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2012 International Conference on Modelling,Identification and control(建模、辨别与控制国际会议 ICMIC 2012)

作者： Xi Chen Lan Zhang Wei Li Institute of System engineering Huazhong University of Science & TechnologyImage Processing and Int Candidate for Master of Systemengineering Huazhong University of Science & TechnologyImageProcessin Department of Control Science &Engineering Image Processing and Intelligent Control Key Laboratory o

ISBN: (纸本)9781467315241

Synchronization and pinning control of complex networks is to regulate the agents' behavior and improve network *** this article, we review some recent developments in pinning *** algorithms and pining strategies in different types of complex networks are presented and *** pinning control is also *** addition, the research extended to discrete-time case is *** some related research, the development in consensus and flocking of multi-agent system are introduced *** last, we give some ideas about pinning control in social networks.

关键词： Complex network pinning control adaptive control multi-agent systems

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Multiple index optimization method based on orthogonal design and fuzzy analysis for electrical resistance tomography sensor design

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ICIC Express Letters 2012年第9期6卷 2301-2307页

作者： Wang, Pai Guo, Baolong Li, Nan The Institute of Intelligent Control Image Engineering Xidian University P.O. Box 284 No. 2 Taibai Road Xi'an 710071 China College of Mechanical Engineering and Applied Electronics Technology Beijing University of Technology No. 100 Pingleyuan Chaoyang District Beijing 100124 China

A multiple index optimization method for ERT sensors is put forward which combines an orthogonal design and fuzzy analysis. This method first establishes a scientific and proper fuzzy evaluation method using fuzzy mathematics to define ERT index satisfaction (ERTIS) and overall ERT index satisfaction (OERTIS) and to construct their satisfaction functions. It unifies all of ERT sensor indices into a single comparable satisfaction value. Then, the OERTIS analysis is developed which allows a set of multiple index orthogonal experiments to be transferred into a single index orthogonal experiment, where, the uniformity index and the correlation coefficient index of the ERT sensor are set as the optimization objectives. The experiments are set up based on multi-index orthogonal design. The experimental results indicate that the method can derive an evenly distributed sensitivity field and a better image with the optimized sensors, and improve the OERTIS of the ERT sensors by 13.75%. © 2012 ICIC International.

关键词： Functions

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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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Line Prediction and Transform for Intra Coding

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电子学报(英文版) 2011年第3期20卷 516-520页

作者： JIANG Jie GUO Baolong LAI Changcai MO Wei Institute of Intelligence Control and Image Engineering Xidian University Xi'an China Advanced Research Department Huawei Hisilicon Technologies Shenzhen China China Electronics Standardization Institute Beijing China)

A new intra coding method based on one dimensional line prediction with different transform is presented. The H.264/AVC design includes a multidirectional spatial prediction method to reduce spatial redundancy by using neighboring samples as a predictor for all the samples in a block of data to be encoded. In the proposed intra coding method, the spatial prediction is performed line-based in horizontal or vertical direction instead of in the block-based manner used in the current H.264/AVC standard, while the block structure is either retained or one dimensional based for the residual difference transform and entropy coding process. Experimental results on CIF (352 × 288) and 720P (1280 × 720) sequences show that the new line based intra coding framework reduces the bit rate by approximately 7% and up to 12% at the same PSNR in comparison with H.264/AVC baseline profile.

关键词：空间预测帧内编码 H.264/AVC 编码方法垂直方向编码过程 PSNR 多方位

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Forward simulation of remaining oil exploration in cross-well by time domain electromagnetic method

Forward simulation of remaining oil exploration in cross-wel...

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IEEE International Conference on Communication Software and Networks

作者： Xi-Jin, Song Rui-Rong, Dang Bao-Long, Guo Xue-Long, Wang Key Laboratory of Photoelectric Logging and Detecting of Oil and Gas Ministry of Education Xi'An Shiyou University Xi'an China Institute of Intelligent Control and Image Engineering Xidian University Xi'an China College of Computer Science and Technology Xi'An University of Technology Xi'an China

ISBN: (纸本)9781612844855

Based on electromagnetic field theory, this paper derived the general expressions of time domain responses for cross-well electromagnetic logging. The emission waveform may be chosen as bipolar square wave by calculating the spectrums of three types of transmit signals. And the effects of thickness, magnetic permeability and electrical conductivity of the casing on time domain electromagnetic logging responses were analyzed. The computation results show that the casing change whether thinner or thicker has an obvious effect on the time domain logging responses. The simulation results also indicate the higher the casing electrical conductivity, the lower the response signal amplitude;and the lower the magnetic permeability, the more easy the electromagnetic signals through the casing. Furthermore, the sensitivity analysis of the time domain electromagnetic responses to the formation resistivity indicates that the electromagnetic responses are fairly sensitive to the formation resistivity. This result proved the feasibility and effectiveness of cross-well time domain electromagnetic logging technology applies to the field of oil and gas exploration. © 2011 IEEE.

关键词： Magnetic permeability

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Improving strategies on PSO for suborbit launch vehicle trajectory optimization

Improving strategies on PSO for suborbit launch vehicle traj...

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4th International Workshop on Advanced Computational Intelligence, IWACI 2011

作者： Xie, Fuqiang Yang, Ye Chang, Songtao Wang, Yongji School of Electric Engineering University of Souch China Hengyang China Beijing Aerospace Automatic Control Institute Beijing China Department of Control Science and Engineering Key Laboratory of Ministry of Education for Image Processing and Intelligent Control Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9781612843735

Solving the optimal control problem with a free final time, such as suborbital launch vehicle (SLV) trajectory optimization with two control variables and multi-constraints ones based on particle swarm optimization (PSO), the smoothness of control variable can not be satisfied by linear interpolation method. A novel method including some improving strategies based on PSO for trajectory optimization is proposed, named LCPSO which is a kind of Cooperate PSO based on Legendre orthogonal polynomials. An additional control variable is introduced and transcribes the original optimal problem to a problem with fixed final time, and one dimension searching method based on interval analysis is used to optimize the additional control variable. Furthermore, a theorem on how to find the boundaries of the coefficient of polynomials is proved. Compared with basic PSO, LCPSO has traits of lower dimensions and smoother control variable. An example of trajectory optimization shows the effectiveness of the LCPSO algorithm. © 2011 IEEE.

关键词： Aerodynamics

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Data model driven architecture (DMDA)

Data model driven architecture (DMDA)

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4th International Workshop on Advanced Computational Intelligence, IWACI 2011

作者： Chen, Chen Chen, Xueguang Liu, Hong Institute of Systems Engineering Huazhong University of Science and Technology Wuhan 430074 China Key Lab. for Image Processing and Intelligent Control Huazhong University of Science and Technology Wuhan 430074 China

ISBN: (纸本)9781612843735

Based on the current development of Model Driven Architecture (MDA) in Enterprise Information System (EIS), the paper proposes a DMDA, a new development architecture to improve EIS development speed and quality. The basic idea of the DMDA is to take advantage of formal description, decomposition and re-use on EIS development process to let computer understand development demands of developers and then consequently generate some business models having nothing to do with specific technical realization, combine with specific technical basic platform to finally generate the EIS meeting actual demands based on data model. The practice proves the architecture is capable of simplifying EIS development difficulty, expediting application and development speed, improve development quality and achieve the rapid development purpose. © 2011 IEEE.

关键词： Software design

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

The analytical algorithm of program quaternion in the arbitr...

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2011 3rd International Asia Conference on Informatics in control, Automation and Robotics, CAR 2011

作者： Ni, Shaobo Wu, Jianwu Shan, Jiayuan Liu, Lei 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

ISBN: (纸本)9783642259913

The analytical algorithm of program quaternion is studied, aiming at the problem of the arbitrary spacecraft attitude-adjusting control. It also provides the analytical constructor method of the program quaternion for any given initial quaternion and angle velocity, terminal quaternion and angle velocity. The advantages of this method are as follows: (1) Good adaptability. Both of the initial and terminal conditions are arbitrary;(2) Simple model. The calculation process only involves the simple algebraic operation;(3) Easy to optimize. By using the program quaternion model, the time consumption in the process of spacecraft attitude adjustment and the maximum angular velocity can be optimized directly. According to the Mathematical simulation results, the program quaternion tracking can be realized by a simple PD control law. © 2011 Springer-Verlag.

关键词： Attitude control

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