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A two-phase heurist algorithm for the capacitated location-routing problem

Journal of information and Computational Science 2009年第4期6卷 1823-1830页

作者： Zhen, Tong Zhang, Qiuwen Department of Control Science and Engineering Huazhong Univ. of Sci. and Technol. Wuhan 430074 China College of Information Science and Engineering Henan University of Technology Zhengzhou 450001 China

The capacitated location-routing problem (CLRP) belongs to the field of logistics of transportation. The CLRP appears as a combination of two difficult problems: the facility location problem (FLP) and the vehicle routing problem (VRP). It is a NP-hard problem. In order to solve practical large scale capacitated LRP, We propose a two-phase approach to solve the CLRP. The approach is based on simulated annealing (SA) and ant colony algorithm (ACA). In the first phase of the proposed algorithm, a simulated annealing is performed on the location variables to determine the location of facilities and the allocation of customer to the facilities. In the second phase, in order to obtain a good routing for the given configuration, an improved ant colony algorithm (IACA) is proposed for the capacitated vehicle routing problem (CVRP). To compare the proposed algorithm with other heuristic algorithms, a series of computational experiments are done on randomly generated test problems. The simulation results demonstrate that the above approach is feasible and efficient. © 2009 Binary information Press.

关键词： Simulated annealing

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Boundedness and stability for the solutions of impulsive neural networks with time-varying delay

Boundedness and stability for the solutions of impulsive neu...

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International Joint Conference on Neural Networks (IJCNN)

作者： Xuyang Lou Ruliang Wang Baotong Cui College of Communication and Control Engineering Jiangnan University Wuxi China Department of Information Technology Guangxi Teachers Education University Nanning China

By employing Lyapunov functions and Razumikhin techniques, we analyze the uniform boundedness and uniform asymptotic stability for a large class of impulsive neural networks with time-varying delay. Some new criteria are obtained to ensure the uniform boundedness and uniform asymptotic stability of the impulsive neural networks. The results remove the usual assumption that the activation functions f j (ldr) are of bounded, monotonous or differential character. Moreover, the time-varying delay function is not required to be differential. Therefore, the results which are easy to check and apply in practice, extend and improve the earlier publications.

关键词： Neural networks Asymptotic stability Lyapunov method Artificial neural networks Stability analysis Delay effects Stability criteria Sufficient conditions Frequency Differential equations

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3D virtual reality simulator for planetary rover operation and testing

3D virtual reality simulator for planetary rover operation a...

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IEEE International Symposium on Virtual Environments, Human-Computer Interfaces and Measurement Systems (VECIMS)

作者： Chang-qing Yu He-hua Ju Yang Gao Department of Electronic Information & Control Engineering Beijing University of Technology Beijing China Surrey Space Centre University of Surrey Guildford UK

This paper describes a computer-simulated virtual reality environment for planetary rover operation and testing. The proposed 3D Virtual Rover Operation Simulator (VROS) consists of rover model, perception of the planetary surface, and rover-terrain contact model, which provides a simulation platform to test and validate different rover chassis design, navigation and locomotion algorithms, and to support rover operation. Lab-based experiments have been carried out and results can demonstrate various functions of VROS and its performance.

关键词： Virtual reality Testing Navigation Laser modes Virtual environment Computational modeling Computer simulation Space technology Mars Extraterrestrial measurements

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Study of Direction Probability and Algorithm of Improved Marriage in Honey Bees Optimization for Weapon Network System

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Defence technology（防务技术） 2009年第2期5卷 152-157页

作者：杨晨光涂序彦陈杰 Systems Engineering Research Institute China State Shipbuilding Corporation Department of Automation School of Information Science and Technology Beijing Institute of Technology Ministry of Education of Key Laboratory of Complex System Intelligent Control and Decision Beijing Institute of Technology

To solve the weapon network system optimization problem against small raid objects with low attitude,the concept of direction probability and a new evaluation index system are *** calculating the whole damaging probability that changes with the defending angle,the efficiency of the whole weapon network system can be subtly *** such method,we can avoid the inconformity of the description obtained from the traditional index *** new indexes are also proposed,*** index,overlap index and cover index,which help manage the relationship among several *** normalizing the computation results with the Sigmoid function,the matching problem between the optimization algorithm and indexes is well ***,the algorithm of improved marriage in honey bees optimization that proposed in our previous work is applied to optimize the embattlement *** is carried out to show the efficiency of the proposed indexes and the optimization algorithm.

关键词：网络系统优化问题破坏概率算法改进核武器蜜蜂婚姻 Sigmoid函数

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Fiber Bragg Grating Sensor with a Simple Demodulation Method

Fiber Bragg Grating Sensor with a Simple Demodulation Method

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Photonics and Optoelectronics, SOPO

作者： Tao Hu Zhiwei Lv Yong Zhao Xinyuan Zhang Bo Yuan Department of Automatic Testing and Control Harbin Institute of Technology Harbin China College of Information Science and Engineering Northeastern University Shenyang China

Principle, structure design, and experimental setup of a fiber Bragg grating (FBG) sensor with a simple signal detection method for demodulation of resonance wavelength shift of the FBG are introduced, which uses a cascade self-demodulated fiber Bragg grating pair attached respectively on the upper and lower surface of a pendulum-type cantilever element instead of a twice reflection FBG pair structure for both parameter sensing and wavelength shift signal demodulating. In addition, cross-sensitivity effect of FBG-based sensor automatically solved due to a differential signal process method. With this demodulation method, current, and vibration measurement experiments are carried out. Experimental results indicate that current measurement error of plusmn1 mA can be obtained within the whole range from 0 to 400 mA, vibration measurement are also obtained based on the present experiment setup.

关键词： Demodulation Fiber gratings Bragg gratings Vibration measurement Design methodology Signal design Signal detection Resonance Surface waves Reflection

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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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Enhanced cognitive resource management for QoS-guaranteed service provisioning in home/office network

Enhanced cognitive resource management for QoS-guaranteed se...

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IFIP/IEEE International Symposium on Integrated Network Management

作者： Shahnaza Tursunova Son Tran Trong Bong-Kyun Lee Eun-Young Cho You-Hyeon Jeong Young-Tak Kim Department of Information and Communication Engineering Graduate School Korea Network Control Technology Research Team ETRI Yeungnam University South Korea

ISBN: (纸本)9781424434862

In this paper, we propose an enhanced cognitive resource management for QoS-aware service provisioning in wired and wireless home/office network. We enhance QoS-aware customer network management (Q-CNM) system. The Q-CNM controls overall management process in home/office network, gathers network information, and processes incoming requests through QoS-aware resource allocation with connection admission control (CAC) function. Especially the cognitive management process at the Q-CNM provides load redistribution, optimized resource utilization for QoS-guaranteed differentiated service provisioning based on obtained knowledge about network. The detailed analysis of QoS-aware resource allocation and cognitive management process at the Q-CNM are explained. The network performance and QoS parameters are analyzed based on experimental implementation of the proposed management scheme in a real testbed environment and ns-2 network simulator.

关键词： Resource management Wireless LAN Performance analysis Testing Analytical models Ethernet networks Quality of service Intelligent networks Admission control Multimedia systems

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A fast motion estimation algorithm based on Diamond and Hexagon Search patterns

A fast motion estimation algorithm based on Diamond and Hexa...

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Joint Conferences on Pervasive Computing (JCPC)

作者： Yun Cheng Lin Yang Zhiwen Fang Hailiang Hou Ganxin Chen School of Information Science and Engineering Central South University Changsha China Department of Communication and Control Engineering Hunan Institute of Humanities Science and Technology Loudi China

ISBN: (纸本)9781424452279;9781424452286

Based on the directional characteristic of SAD (Sum of Absolute Difference) distribution and the center-biased characteristic of motion vectors, a fast BMA(block-matching motion estimation algorithm), DHS (Diamond and Hexagon Search), is proposed in this paper. DHS employs HP to locate the best matching block with large motion vector, and diamond search pattern (DP) to refine the motion vector. Although the proposed DHS may also be trapped in local minima, the experimental results show that it is faster than UMHexagonS (Unsymmetrical-cross multi-hexagon-grid Search), while its encoding efficiency is better than DS and it is almost the same as that of UMHexagonS.

关键词： Motion estimation Pattern matching Encoding control engineering Automatic voltage control Testing Electrostatic discharge Spread spectrum communication Video sequences Shape

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Review of power quality signal compression based on wavelet theory

Review of power quality signal compression based on wavelet ...

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International Conference on Test and Measurement (ICTM)

作者： Lin Lin Nantian Huang Wenhuan Huang College of Information and Control Engineering Jilin Institute of Chemical Technology Jilin China Department of Electrical Engineering Harbin Institute of Technology Harbin China College of Chemical and Materials Engineering Jilin Institute of Chemical Technology Jilin China

ISBN: (纸本)9781424446995

Power quality (PQ) signals are the foundation of power quality analysis. Aim to get accurate analysis results, PQ signals should be recorded with high simple rate. Traditional power quality signal record methods with no data compression get a large amount of data set. It will cause the waste of memory space and difficult to transmit the data set. Wavelet transform is a very effective method for PQ signal compression. Therefore, this paper provides a status report of wavelet based PQ signals compression in the time-frequency domain through an overview of recent contributions. The results of the literature review indicate that power quality signals compression using wavelet transform is a very powerful tool and has been utilized in power system effectively. Wavelet-based compression methods using different types of wavelet transform and optimal wavelet thresholds have high compression ratio and reserve important details of original signals. The expectation is that further research and applications of wavelet will be widely applied in power quality signal compression.

关键词： Power quality Wavelet transforms Chemical technology Signal analysis Data compression Wavelet domain Frequency Power system analysis computing Educational institutions control engineering

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Configure vulnerability assessment based on potential energy model

Configure vulnerability assessment based on potential energy...

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International Conference on Sustainable Power Generation and Supply, SUPERGEN

作者： Qunying Liu Junyong Liu Qi Huang Department of Electrical Engineering and Control University of Electronic Science and Technology Chengdu Sichuan China School of Electrical Engineering and Information Sichuan University Chengdu Sichuan China

ISBN: (纸本)9781424449347

According to the integral theory of energy function, branch potential energy function model is constructed, and then two indexes are proposed: one is the current vulnerability, which quantifies the distance between the current transmitted power and initial transmitted power to identify the current vulnerable area, the other is the forecasting vulnerability, which is gained through computing the branch vulnerability considering the impact of power injection changing. By the two indexes, the current and forecasting vulnerable area can be identified and the correctness of the former one can be validated. Through the simulations in IEEE-30 bus system and the comparison with optimal power flow under N-1 and N-2 faults, the results show that the branch potential energy function model have many advantages such as rapid computation without being influenced by the convergent condition of power flow, identifying and forecasting the vulnerable branch exactly. Because of these, the application of this method on the on-line security monitoring is expected.

关键词： Potential energy Power system modeling Power transmission Predictive models Power system security Load flow Load forecasting Voltage Reactive power Senior members

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