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Moshi Shibie yu Rengong Zhineng/Pattern Recognition and Artificial Intelligence 2009年第3期22卷 344-348页

作者： Sun, Bin Sang, Nong Li, Zheng Zheng, Qing-Qing State Education Commission Key Laboratory for Image Processing and Intelligent Control Institute of Pattern Recognition and Artificial Intelligence Huazhong Univ. of Sci. and Technol. Wuhan 430074 China

The study of the second order motion in biological vision is a new source of inspiration for algorithms and research directions in computer vision. In this paper, the second order motion can be divided into three typical group according to the modulation types: spatial modulate motion, temporal modulate motion and spatio-temporal modulate motion. Experiments are conducted on the first order motion perception based on correlation model and the second order motion perception by correlation model preceded with a nonlinear process called texture grabber. The computational results are consistent with the previous suggestion that the second order motions are processed by nonlinear system.

关键词： Modulation

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Multiobjective social evolutionary algorithm based on multi-agent

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Ruan Jian Xue Bao/Journal of Software 2009年第7期20卷 1703-1713页

作者： Pan, Xiao-Ying Liu, Fang Jiao, Li-Cheng Key Lab. of Intelligent Perception and Image Understanding of the Ministry of Education of China Institute of Intelligent Information Processing Xidian University Xi'an 710071 China School of Computer Science and Engineering Xidian University Xi'an 710071 China

In this paper, a multi-agent social evolutionary algorithm is proposed for multiobjective optimization problems. It completes the search process by the agent evolution. MOMASEA (multi-agent social evolutionary algorithm for multiobjective) defines the trust degree to denote the historical information of agents, and the neighborhood of agent is confirmed by it. According to the characteristic of multiobjective problems, three evolutionary operators are designed to complete the whole evolutionary process. The experimental results show that MOMASEA has a good convergence to the Pareto set. Furthermore, the analysis of the mode for instructs local environment verified that importing acquaintance net model can speed up the convergence effectively. © by Institute of Software, the Chinese Academy of Sciences.

关键词： Multiobjective optimization

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Almost Sure Exponential Stability of Recurrent Neural Networks With Markovian Switching

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IEEE TRANSACTIONS ON NEURAL NETWORKS 2009年第5期20卷 840-855页

作者： Shen, Yi Wang, Jun Huazhong Univ Sci & Technol Dept Control Sci & Engn Wuhan 430074 Hubei Peoples R China Huazhong Univ Sci & Technol Key Lab Minist Educ Image Proc & Intelligent Cont Wuhan 430074 Hubei Peoples R China Chinese Univ Hong Kong Dept Mech & Automat Engn Shatin Hong Kong Peoples R China

This paper presents new stability results for recurrent neural networks with Markovian switching. First, algebraic criteria for the almost sure exponential stability of recurrent neural networks with Markovian switching and without time delays are derived. The results show that the almost sure exponential stability of such a neural network does not require the stability of the neural network at every individual parametric configuration. Next, both delay-dependent and delay-independent criteria for the almost sure exponential stability of recurrent neural networks with time-varying delays and Markovian-switching parameters are derived by means of a generalized stochastic Halanay inequality. The results herein include existing ones for recurrent neural networks without Markovian switching as special cases. Finally, simulation results in three numerical examples are discussed to illustrate the theoretical results.

关键词： Almost sure exponential stability Halanay inequality Markov chain recurrent neural networks time-varying delay

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High-Precision Discrete Convolution Algorithm Based on Moments

High-Precision Discrete Convolution Algorithm Based on Momen...

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WRI International Conference on Communications and Mobile Computing, CMC

作者： Jianguo Liu Zhenbing Liu Guoyou Wang Key Laboratory of Education Ministry for Image Processing and Intelligent Control State Key Laboratory of Multispectral Information Processing Technologies Institute of Pattern Recognition and Artificial Intelligence Huazhong University of Science and Technology Wuhan China

Convolution is an important and useful operation in the fields of digital signal processing. In this paper, based on the previous work of performing discrete Fourier transform (DFT) via linear sums of discrete moments, we have made development to eliminate multiplications in discrete Fourier transforms by performing appropriate bit operations and shift operations in binary system, which can be implemented by integer additions of fixed points; then using the convolution theorem with the DFT, we compute the convolution with two DFTs, a point-by-point product, and an inverse DFT. Our algorithm involves fewer multiplications and can deal with arbitrary length signals.

关键词： Convolution Signal processing algorithms Discrete Fourier transforms Very large scale integration Algorithm design and analysis laboratories Educational technology Digital signal processing Mobile communication Mobile computing

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High-Precision and Arbitrary-length Fixed-Point Fast Hartley Transform without Multiplications

High-Precision and Arbitrary-length Fixed-Point Fast Hartley...

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WRI International Conference on Communications and Mobile Computing, CMC

作者： Zhenbing Liu Jianguo Liu Guoyou Wang Key Laboratory of Education Ministry for Image Processing and Intelligent Control State Key Laboratory of Multispectral Information Processing Technologies Institute of Pattern Recognition and Artificial Intelligence Huazhong University of Science and Technology Wuhan China

Discrete Hartley transform (DHT) is an important tool in digital signal processing. In this paper, based on our previous work of performing DHT via linear sums of discrete moments, we have made development to eliminate multiplications in discrete Hartley transforms by performing appropriate bit operations and shift in binary system, which can be implemented by integer additions of fixed points. An efficient and regular systolic array is designed to implement it, and the complexity analysis is also given. Different to other fast Hartley transforms, our algorithm can deal with arbitrary length signals and get high precision. The approach is also applicable to multi-dimensional DHT and DHT inverses.

关键词： Discrete transforms Signal processing algorithms Digital signal processing Systolic arrays laboratories Educational technology Very large scale integration Hardware Mobile communication Mobile computing

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Patients' attitudes towards online dental information and a web-based virtual reality program for clinical dentistry: A pilot investigation in China

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INTERNATIONAL JOURNAL OF MEDICAL INFORMATICS 2009年第3期78卷 208-215页

作者： Hu, Jian Lu, En Song, Enming Xu, Xiangyang Tan, Hongbao Zhao, Yi Wang, Yining Li, Zhiyong Wuhan Univ Dept Prosthodont Sch Stomatol Wuhan Peoples R China Wuhan Univ Dept Prosthodont Hosp Stomatol Wuhan Peoples R China Sichuan Univ State Key Lab Oral Dis Chengdu Peoples R China Huazhong Univ Sci & Technol MOE Key Lab Image Proc & Intelligent Control Wuhan Peoples R China Huazhong Univ Sci & Technol Coll Comp Sci & Technol Wuhan Peoples R China Wuhan Univ Sch Stomatol Minist Educ Key Lab Oral Biomed Engn Wuhan Peoples R China Wuhan Univ Hosp Stomatol Minist Educ Key Lab Oral Biomed Engn Wuhan Peoples R China

Objectives: This research investigated (1) the attitudes of dental patients toward searching online for dental information and (2) patients attitudes and expectations towards a web-based 3D virtual reality program for clinical dentistry. Methods: A questionnaire survey was conducted in six clinics across two cities in China. Dental patients visiting the six clinics were invited to participate in the study. All subjects browsed a webpage containing the 3D virtual reality dental program. The new media was supplemented as a consultive system for patients into the traditional pattern of seeking dental care procedure. Subjects then completed a questionnaire detailing their attitudes toward their experience with the software. The questionnaire responses were then collected and analyzed. Results: 45% of respondents reported having searched information online before receiving dental care. Respondents held different attitudes towards the online dental information, with a majority reporting a reliance on it but with reservations. Over 50% of respondents held positive attitudes to the web-based virtual reality dental information program, while 21% reported negative views toward the new method. Most respondents reported that the web-based virtual reality program was superior to traditional static web pages, but only as a supplementary material. Respondents also indicated that internet speed may likely be a major determinant to their future usage of such a system. Conclusions: These findings indicate that a considerable portion of respondents conduct their own internet searches for related dental information before seeking professional advice on dental care. Most of the respondents reported positive attitudes towards a web-based virtual reality program for clinical dentistry. However, the current speed of internet connections in China is a major area of concern for the future application and uptake of web-based virtual reality dental software. (C) 2008 Elsevier Ireland Ltd. All

关键词： Dental informatics Virtual reality Internet 3D webpage

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Decentralized adaptive stabilization of nonlinear interconnected stochastic systems by output feedback

Decentralized adaptive stabilization of nonlinear interconne...

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International Conference on control and Automation (ICCA)

作者： Huijin Fan Li Xu The Key Laboratory of Image Processing and Intelligent Control Department of Control Science and Engineering Huazhong University of Science and Technology China The Department of Electronics and Information Systems Akita Prefectural University Akita Japan

ISBN: (纸本)9781424447060

This paper studies the stabilization problem for a class of stochastic nonlinear interconnected systems with unknown parameters involved. By employing filtered transformation, the stochastic Lyapunov-like theorem and the back-stepping design technique, a decentralized output-feedback controller and parameter adaptive law are proposed. It is proved that the closed-loop, large-scale, interconnected stochastic systems is globally asymptotically stable in probability.

关键词： Stochastic systems Output feedback control systems Adaptive control Stochastic processes Interconnected systems Nonlinear systems Programmable control Differential equations Nonlinear control systems

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Dynamic analysis of a two-stage supply chain-a switched system theory approach

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INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY 2009年第1-2期43卷 200-210页

作者： Wang, Hongwei Liu, Huixin Yang, Jian-bo Huazhong Univ Sci & Technol Inst Syst Engn Wuhan 430074 Peoples R China Huazhong Univ Sci & Technol State Key Lab Image Proc & Intelligent Control Wuhan 430074 Peoples R China Zhengzhou Univ Dept Engn Management Zhengzhou 450001 Peoples R China Univ Manchester Manchester Business Sch E Manchester M60 1QD Lancs England

This paper investigates the dynamics of a two-stage supply chain consisting of one retailer and one distributor with order-up-to control policy. A discrete time state space model is developed to analyze the system. Due to the constraints of the distributor's capacity, the supply chain turns out to be an autonomous switched system corresponding to the shipment policy of the distributor. The stability of the system studied is analyzed using switched system theory and discrete system control theory for the practical perspective. This study shows that the system will exhibit stable, periodic, and divergent behavior with different order policy parameters due to the switching mechanism within the system. The relationship between dynamics and cost is investigated, and insights are obtained about the control of the supply chain.

关键词： Supply chain Inventory control Switched system Nonlinear dynamics

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Solving 3-coloring problem by tissue P systems with cell separation

Solving 3-coloring problem by tissue P systems with cell sep...

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International Conference on Bio-Inspired Computing: Theories and Applications, BICTA

作者： Shuo Wang Zhengke Miao Xiaolong Shi Zheng Zhang Key Laboratory of Image Processing and Intelligent Control Department of Control Science and Engineering Huazhong University of Science and Technology Wuhan Hubei China Department of Mathematics XuZhou Normal University of China Xuzhou China

Tissue P systems are a class of distributed and parallel computing models inspired by intercellular communication and cooperation between neurons. An interesting variant of tissue P systems is known as tissue P systems with cell separation, which is endowed with the ability of generating an exponential workspace in a linear time and in this way getting the possibility to solve computationally hard problems in polynomial time. In this paper, a uniform solution to 3-coloring problem by tissue P systems with cell separation is presented, which is linear in terms of the number of vertices and the number of edges.

关键词： Polynomials Biomembranes NP-complete problem Distributed computing Neurons Tree graphs image processing intelligent control Mathematics Mathematical model

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Solving multidimensional 0–1 knapsack problem by tissue P systems with cell division

Solving multidimensional 0–1 knapsack problem by tissue P s...

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International Conference on Bio-Inspired Computing: Theories and Applications, BICTA

作者： Juanjuan He Zhengke Miao Zheng Zhang Xiaolong Shi Key Laboratory of Image Processing and Intelligent Control Department of Control Science and Engineering Huazhong University of Science and Technology Wuhan Hubei China Department of Mathematics XuZhou Normal University of China Xuzhou China

Tissue P systems with cell division are biologically inspired theoretical models of distributed and parallel computing, which provide the possibility to solve computationally hard problems in polynomial time. In this paper, we present a semi-uniform solution to the multidimensional 0-1 knapsack problem by such kind of devices, which is linear in terms of the number of variables, the number of constraint inequalities, and all coefficients related with variables.

关键词： Multidimensional systems Biomembranes Biology computing Polynomials Biological tissues Cells (biology) Biological system modeling Helium image processing intelligent control

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