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IEEE Congress on Evolutionary Computation

作者： Mabu, Shingo Hirasawa, Kotaro Obayashi, Masanao Kuremoto, Takashi Yamaguchi Univ Grad Sch Sci & Engn Tokiwadai 2-16-1 Ube Yamaguchi 7558611 Japan Waseda Univ Informat Prod & Syst Res Ctr Fukuoka 8080135 Japan

ISBN: (纸本)9781479904549;9781479904532

Genetic Algorithm (GA) and Genetic Programming (GP) are typical evolutionary algorithms using string and tree structures, respectively, and there have been many studies on the extension of GA and GP. How to represent solutions, e. g., strings, trees, graphs, etc., is one of the important research topics and Genetic Network Programming (GNP) has been proposed as one of the graph-based evolutionary algorithms. GNP represents its solutions using directed graph structures and has been applied to many applications. However, when GNP is applied to complex real world systems, large size of the programs is needed to represent various kinds of control rules. In this case, the efficiency of evolution and the performance of the systems may decrease due to its huge structures. Therefore, distributed GNP has been studied based on the idea of divide and conquer, where the programs are divided into several subprograms and they cooperatively control whole tasks. However, because the previous work divided a program into some subprograms with the same size, it cannot adjust the sizes of the subprograms depending on the problems. Therefore, in this paper, an efficient evolutionary algorithm of variable size distributed GNP is proposed and its performance is evaluated by the tileworld problem that is one of the benchmark problems of multiagent systems in dynamic environments.

关键词： evolutionary computation directed graph distributed structure variable size reinforcement learning decision making

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WPT-Based Modal Control on distributed structures with MRF-04K Damper

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Transactions of Tianjin University 2011年第6期17卷 397-403页

作者：林伟李忠献张根明黄鹏云 School of Civil Engineering Fuzhou University School of Civil Engineering Tianjin University

The magnetorheological （MR） fluid damper-based semiactive control systems have received considerable attention for protecting structures against natural hazards such as strong earthquakes and high winds. In this paper, a novel modal controller using wavelet packet transform （WPT） is proposed for the vibration control of distributed structures. In the proposed control system, the WPT method is utilized to decompose the acceleration measurement and select the modes containing most of the WPT energy component as the dominant modes. Then, a modal controller is designed to control the dominant modes and the optimal active control force is solved. Finally, Clipped-optimal con- trol law is adopted to determine the voltage applied to each MR damper. A Kalman-filter observer, which estimates the full controlled modal states from local accelerometer feedbacks, is designed for rendering the controller to be more applicable to distributed structures with a large number of degrees of freedom. A numerical example of a stadium root structure installed with MRF-04K damper is presented. The effectiveness of the controller is evaluated under both Tianjin and E1 Centro earthquake excitations. The superior performance and adaptability of the controller for versatile loading conditions are demonstrated through the comparison with traditional truncated modal controller.

关键词： distributed structure modal control semiactive control wavelet packet transform magnetorheological （MR） damper Kalman-filter

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A fault diagnosis scheme for simultaneous actuator and sensor failures

A fault diagnosis scheme for simultaneous actuator and senso...

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International Conference on Computer Science and Network Technology (ICCSNT)

作者： Xianhui Liu CAD Research Center Tongji University Shanghai China

ISBN: (纸本)9781467329637

A new fault detection and diagnosis (FDD) scheme is proposed to detect actuator and sensor simultaneous faults. The scheme is based on strong-tracking multiple-model Estimator (STMME) and uses distributed structure. Two STMMEs are used to detect actuator and sensor faults respectively, in which unknown failure parameters can be estimated as augmented state variables. Simulation is presented based on aero dynamics. The results show that the FDD scheme is effective in detecting and estimating single and simultaneous actuator and sensor faults.

关键词： Fault detection and diagnosis Strong-tracking multiple-model Estimator Styling Simultaneous faults distributed structure aesthetic design distributed structureS Defect detection actuators Sensors disc drives Scheme

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CRH3型动车组故障仿真训练系统的研究

CRH3型动车组故障仿真训练系统的研究

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作者：张耀方北京交通大学

学位级别：硕士

Electric Multiple Unit (EMU) has been widely applied in passenger dedicated lines since the sixth speedup scheme for the railway in April2006. With the expansion of the operation scale, emergent faults happen to EMU frequently. For example, more than20faults occurred to CRH3in Wu Guang dedicated line which affects the traffic safety and the punctual operation of trains. In order to improve the trouble-shooting capacity of the EMU drivers and the effect of training, it's necessary to develop a high-speed EMU fault simulation and training system based on computer simulation technology. On the basis of analyzing the latest domestic and foreign research results of the EMU driving simulator and its trouble-shooting simulation training system, a distributed simulation system is designed for CRH3-EMU with an extensible and maintainable structure of C/S based on Ethernet. According to the functions, the system is divided into four modules including server module, fault setting module, fault display module and trouble-shooting *** each module is described in details. Using object-oriented method, the full software simulation is used for trouble-shooting training *** network communication environment with Ethernet and TCP/IP protocol is realized, and ADO is used to access the Database. The modules are developed under the developing environment of Visual Studio2005. Especially, the designs of virtual trouble-shooting platform with Measurement Studio and multi-thread synchronization between display interface module and communication module are introduced in the thesis. Finally, with the determining of the evaluation model, parameters and the weighting parameters, the trouble-shooting evaluation algorithm is proposed based on fuzzy comprehensive evaluation. System is tested in the EMU training of our school, the result proves that the system is complete, humanized and easy to manipulate by trainees and instructors. Especially, the fuzzy comprehensive eval

关键词： CRH3-EMU trouble-shooting simulation distributed structure fuzzy comprehensive evaluation algorithm

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Development of online monitoring system for 1500 V ethylene-propylene-rubber DC feeder cable of Shanghai urban rail transit

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IET GENERATION TRANSMISSION & DISTRIBUTION 2011年第7期5卷 720-728页

作者： Shen, X. J. Jiang, X. C. Tongji Univ Dept Elect Engn Shanghai 200092 Peoples R China Shanghai Jiao Tong Univ Dept Elect Engn Shanghai 200030 Peoples R China

The form of ethylene-propylene-rubber DC feeder cable faults can be attributed to insulation aging and mechanical insulation crack, while integrating the DC leakage current (DLC) signal, and track discharge (TD) signal could effectively detect such defaults online. Further research results about an online monitoring system will be introduced, which is developed to evaluate the insulation of DC feeder cable in the traction substation of the Shanghai urban rail transit. The monitoring system adopts distributed structure and is made up of TD sensors, DLC sensors, data acquisition system and monitoring central with faulty diagnosis expert system. The experiments were carried out, both under the condition that the insulation of the DC feeder cables is in the good and fault status, in the laboratory, respectively, to verify the feasibility of the system. The results indicated that the system can forecast the insulation aging fault and the crack fault of the feeder cable. Furthermore, the system was also installed in the field and put in the real operation and it run stably and reliably in the field, and the diagnostic results were consistent with the actual circumstances.

关键词： traction mechanical insulation crack DLC sensors fault diagnosis insulation aging fault DC leakage current signal faulty diagnosis expert system data acquisition system Power system protection Transportation Substations ethylene-propylene rubber monitoring central distributed structure power cables Shanghai urban rail transit traction substation leakage currents TD sensors ethylene-propylene-rubber DC feeder cable faults voltage 1500 V railways substations online monitoring system track discharge signal Power cables

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Adaptive Hopping Transmission Strategy for Opportunistic Spectrum Access

Adaptive Hopping Transmission Strategy for Opportunistic Spe...

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54th Annual IEEE Global Telecommunications Conference (GLOBECOM)

作者： Derakhshani, Mahsa Le-Ngoc, Tho McGill Univ Dept Elect & Comp Engn Montreal PQ H3A 2K6 Canada

ISBN: (纸本)9781424492688

This paper presents an adaptive hopping transmission strategy for secondary users (SUs) to access temporarily idle frequency-slots of a licensed frequency band in consideration of the random return of primary users (PUs), aiming to maximize the overall SU throughput. A SU dynamically hops over multiple idle frequency-slots, each with an adaptive activity factor so that possible PU return in a frequency-slot may destroy only a small fraction of the SU transmission that can be recovered by erasure-correction coding. SU activity factor optimization problems are formulated to develop adaptive SU access algorithms for both centralized and distributed structures. Numerical results confirm the effectiveness and demonstrate performance gains of the proposed approach as compared to existing schemes.

关键词： Convex functions IEEE Communications Society Multiaccess communication Optimization PU Propagation losses SU activity factor optimization problem SU throughput SU transmission Sensors Throughput adaptive SU access algorithm adaptive activity factor adaptive hopping transmission strategy centralized structure distributed structure encoding erasure-correction coding idle frequency-slots licensed frequency band opportunistic spectrum access primary users radio networks secondary users

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The Design of distributed Industry and Commerce Administration Management System Architecture Based on J2EE

The Design of Distributed Industry and Commerce Administrati...

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2011 4th IEEE International Conference on Computer Science and Information Technology(ICCSIT 2011)

作者： Zhang Zhijun Xu Gongwen Zheng Ziguo Han Guoyong Liu Zhendong School of Computer Science and Technology Shandong Jianzhu University Computer Center Shandong Jianzhu University

ISBN: (纸本)9781612848334

Based on web technology, J2EE applications provide a high portability, high compatibility, safe and reliable platform for enterprise. To begin with the requirements and network environment, analyses the multi-tier distributed architecture of J2EE-based enterprise application platform. And then, combining the requirements and features of commercial business, proposes a functional, technical and distributed database structure design of integrated industry and commerce administration system. This structure can normalize and standardize the commercial business, deeply mine the data and provide decision support.

关键词： J2EE distributed structure industry and commerce administration system decision support

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Research on product rapid development system on Web-based distributed mould industry public service platform

Research on product rapid development system on Web-based Di...

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2011 2ND International Conference on Innovative Computing and Communication and 2011 Asia-Pacific Conference on Information Technology and Ocean Engineering(CICC-ITOE 2011)

作者： ZHANG Desheng School of Economic & Management Weifang University

along with the information technology and network technology development, it is possible for the industry to share the market, technology, labor and products through the Web, so that every process can be achieved most efficiently and in the lowest cost. A kind of service platform's architecture suited for product rapid development in the distributed network environment is put forward in this paper. Some key technologies and enabled tools, such as the real time collaborative meeting managing system used for the people dispersed geographically, the system generating quoted price and contract rapidly and automatically, the system for customer actively evaluating the manufacturing ability of the rapid molding data, and the project managing and workflow managing system etc., are developed. Detailed workflow schema is explained.

关键词： distributed structure mould public service platform rapid product development

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Research on Information Integration of Manufacturing System Based on distributed structure

Research on Information Integration of Manufacturing System ...

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2007国际机械工程与力学会议

作者： Zhenqing GAO Houfang SUN Yuansheng QI College of Information and Mechanical Engineering Beijing Institute of Graphic Communication School of Mechanical and Vehicular Engineering Beijing Institute of Technology

Much of locale information appears from running manufacturing system. Along with the in-depth research and implementation on networked manufacturing, it is necessary to manage and use the locale information, so an open distributed platform is needed to integrate this information. Firstly, a framework of information integration for manufacturing system based on distributed structure is setup. It is implemented in network of manufacturing system. It provides guidance for developing management information system of manufacturing process. Subsequently, architecture of information integration for manufacturing system is proposed. On this condition, a processing platform for locale information is designed. Finally, a model of information integration based on B/S structure is setup with .NET developing environment. Finally, an application example proves this method validity.

关键词： distributed structure Manufacturing System Information Integration

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Broadband 20-Ω 20-W Load Suitable for Characterization of Switch-Mode Amplifiers

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IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT 2010年第9期59卷 2431-2436页

作者： Pursche, Udo Flucke, Jens Wentzel, Andreas Freyer, Stephan Meliani, Chafik Heinrich, Wolfgang Ferdinand Braun Inst Hochstfrequenztech D-12489 Berlin Germany

This paper reports on a broadband dc ground isolated 20-Omega absorber for powers of up to 20 W. The realized absorber achieves reflections (referenced to 20 Omega) below - 10 dB over almost two frequency decades from less than 50 MHz to 2 GHz. It can be used as load resistor in the characterization of power amplifiers, particularly switch-mode ones, where broadband non-50-Omega loads are required for measurement purposes. An additional advantage is that no bias-T is needed with this solution. This reduces measurement uncertainties due to the parasitics of the bias-T. Using the distributed concept offers a generic technique to realize such loads and also for other impedance values and other applications.

关键词： Absorber broadband distributed structure load power amplifier switch mode termination

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