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2010 9th International Power and Energy Conference, IPEC 2010

作者： Jin, Yiding Song, Qiang Liu, Wenhua Sun, Weixin State Key Lab. of Control and Simulation of Power System and Generation Equipments Tsinghua University Beijing China

ISBN: (纸本)9781424473991

Along with the increasing system capacity, large-scaled energy storage systems are supposed to be connected into 10kV or higher networks. Urban network has strict criterions on power quality of the power electronic devices connected. Moreover, the occupancy and noise of industrial frequency transformers also become restraints to the promotion of urban network energy storage. For that reason, this paper proposes a battery energy storage system based on cascaded dc-ac converter, dual active bridges, and a common dc bus. High frequency transformers are used to replace the industrial frequency transformer for insulation, and battery groups are connected to the common dc bus with respective dc-dc interfaces. This multilevel converter system is easy to modularize, easy to extend, and allows different kinds of batteries to work together. The main circuit and proper control system are designed, with the soft-switching condition and current control issues of the dual active bridge analyzed in detail. The simulation results from EMTDC model verify the operation principles and corresponding control strategies. ©2010 IEEE.

关键词： Electric inverters

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VBR MPEG video traffic dynamic prediction based on the modeling and forecast of time series

VBR MPEG video traffic dynamic prediction based on the model...

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NCM 2009 - 5th International Joint Conference on Int. Conf. on networked Computing, Int. Conf. on Advanced Information Management and Service, and Int. Conf. on Digital Content, Multimedia Technology and its Applications

作者： Jun, Dai Jun, Li Key Lab. of Network Communication System and Control Chinese Academy of Sciences USTC Hefei 230027 China

ISBN: (纸本)9780769537696

The variable-bit-rate traffic characteristic brings a large complication to the dynamic bandwidth allocation and renegotiation of network. To solve this problem, this paper proposes a dynamic prediction scheme of MPEG video *** first advance an initial reversible transformation to the original video GoP sizes and then design an algorithm based on the ARMA process modeling to fit the transformed smooth sequence. At last we take advantage of the multi-step forecast of the series to perform a dynamic prediction for original GoP sizes. An experimental study has shown the good effect of the scheme in this paper. With the help of our prediction scheme, the waste of bandwidth will be limited effectively and the network bandwidth allocation and renegotiation can be developed to be very dynamic and intelligent. © 2009 IEEE.

关键词： Frequency allocation

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Hybrid genetic-ant colony algorithm based job scheduling method research of arc welding robot

Hybrid genetic-ant colony algorithm based job scheduling met...

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2010 IEEE International Conference on Information and Automation, ICIA 2010

作者： Meng, Zhengda Chen, Qinqi Key Lab. of Measurement and Control of Complex System of Engineering School of Automation Southeast University Nanjing China

ISBN: (纸本)9781424457021

Research of job scheduling methods of arc welding robot is focused in this paper. The job scheduling of arc welding robot is considered as a Traveling-salesman-Problem. Welding job scheduling is modeled and relevant job scheduling optimization methods are designed. Genetic algorithm and ant colony algorithm are applied to robot welding job scheduling first. Then, based on the characteristics of both algorithms, hybrid genetic ant colony algorithm is designed to improve optimization performance. With simulated weldment as the subject, genetic algorithm, ant colony algorithm and hybrid genetic ant colony algorithm are analyzed and compared by simulation. Validity of above methods is verified. ©2010 IEEE.

关键词： Genetic algorithms

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A Strategy for the Integration of Production Planning and Scheduling in Refineries under Uncertainty

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Chinese Journal of Chemical Engineering 2009年第1期17卷 113-127页

作者：罗春鹏荣冈 State Key Lab. of Industrial Control Technology Institute of Cyber System and Control Zhejiang University Hangzhou 310027 China

A strategy for the integration of production planning and scheduling in refineries is proposed. This strategy relies on rolling horizon strategy and a two-level decomposition strategy. This strategy involves an upper level multiperiod mixed integer linear programming （MILP） model and a lower level simulation system, which is extended from our previous framework for short-term scheduling problems [Luo, C.E, Rong, G, ＂Hierarchical apthis extended framework is to reduce the number of variables and the size of the optimization model and, to quickly find the optimal solution for the integrated planning/scheduling problem in refineries. Uncertainties are also considered in this article. An integrated robust optimization approach is introduced to cope with uncertain parameters with both continuous and discrete probability distribution.

关键词： refinery planning and scheduling optimization model simulation system

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Optimization Algorithm for Home Energy Management system Based on Artificial Bee Colony in Smart Grid

Optimization Algorithm for Home Energy Management System Bas...

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IEEE International Conference on Cyber Technology in Automation, control, and Intelligent systems

作者： Yanyu Zhang Peng Zeng Chuanzhi Zang Key Lab. of Networked Control System Shenyang Institute of Automation Chinese Academy of Sciences

ISBN: (纸本)9781479987313

To implement demand response in residential sector and facilitate the integration of renewable resources and plug-in electric vehicles in future smart grid, this paper proposes a framework of home energy management system (HEMS) and a optimization algorithm for it based on improved artificial bee colony. The algorithm schedules the operations of schedulab.e home appliances according to electricity price, forecasted outdoor temperature and renewable power output, and user preferences to minimize user's electricity cost. The effectiveness of the algorithm is verified by simulations, and the electricity cost can be reduced by 47.76%.

关键词： Smart grid Demand response Home energy management system Artificial bee colony Optimization algorithm Optimization algorithms Smart grids Demand-Responsive bee colonies Energy management systems Domestic architecture electricity costs Bee User preferences

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Directional Beamforming for High-Speed Railway Communications with Frequency Offset Precorrection

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Chinese Journal of Electronics 2014年第1期23卷 163-168页

作者： CAO Yuan WEN Yinghong XU Wei XIE Xin School of Electronics and Information Engineering National Engineering Research Center of Rail Transportation Operation and Control System Beijing Jiaotong University State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University National Mobile Communications Research Lab. Southeast University

This paper considers a multi-antenna transmission strategy for high speed railway communications. In order to achieve better performance than conventional space-frequency block coding schemes, we propose a directional beamforming strategy for the High-speed railway(HSR) communication by exploiting some characteristic of the railway system including predetermined moving tracks and real-time positioning information. Moreover,for alleviating the effect of Doppler shift due to the moving train, a frequency offset precorrection method is also incorporated with direction beamforming. Theoretical Signalto-noise ratio(SNR) gain of the proposed beamforming scheme over traditional HSR communication schemes is also derived for illustrating the performance *** results verify the effectiveness of our proposed scheme even with some kind of imperfect position information availab.e at the transmitter.

关键词： Multiple-input multiple-output(MIMO) Directional beamforming High-speed railway communications Frequency offset precorrection

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Standard Analysis for Transfer Delay in CTCS-3

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Chinese Journal of Electronics 2017年第5期26卷 1057-1063页

作者： CAO Yuan MA Lianchuan XIAO Shuo ZHANG Xia XU Wei National Engineering Research Center of Rail Transportation Operation and Control System Beijing Jiaotong University State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University School of Computer Sciences and Technology China University of Mining & Technology National Mobile Communications Research Lab. Southeast University

According to the standard for the GSM for railway(GSM-R) wireless systems in China train control system level 3(CTCS-3),the control data transfer delay should be no larger than 500 ms with greater than99% *** of both non-redundant networks and intercross redundant networks and cases of single Mobile terminals(MTs) and redundant MTs on one train are considered,and the corresponding vehicle-ground communication models,delay models,and fault models are *** simulation results confirm that the transfer delay can meet the standard requirements under all *** particular,the probability is greater than 99.996% for redundant MTs and networks,and the standard of transfer delay in CTCS-3 will be improved inevitably.

关键词： China train control system level 3(CTCS-3) GSM for railway(GSM-R) Data transfer delay Deterministic and stochastic petri net(DSPN)

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An evolution model for P2P file-sharing networks

An evolution model for P2P file-sharing networks

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2010 International Conference on Computer Modeling and Simulation, ICCMS 2010

作者： Huang, Jing Yin, Baoqun Guo, Dong Lu, Shan Wu, Xumin Key Lab. of Network Communication System and Control Chinese Academy of Sciences University of Science and Technology of China Hefei China

ISBN: (纸本)9780769539416

Propose an evolution model for Peer-to-Peer (P2P) file-sharing systems, which try to capture the dynamic properties of P2P application networks. The model consists of four events: node joining, node departure, connection establishing and connection breaking, which captures the most important events in constructing network topology. The evolution model results in a differential equation about degree distribution, which can be solved analytically. By analyzing the solutions, some interesting results can be got. © 2010 IEEE.

关键词： Network topology

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A novel dynamic model for peer-to-peer file sharing systems

A novel dynamic model for peer-to-peer file sharing systems

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2010 International Conference on Computer Modeling and Simulation, ICCMS 2010

作者： Guo, Dong Yin, Baoqun Lu, Shan Huang, Jing Yang, Jian Key Lab. of Network Communication System and Control Chinese Academy of Sciences University of Science and Technology of China Hefei China

ISBN: (纸本)9780769539416

With widely application of Peer-to-Peer (P2P) file sharing technique, the P2P traffic occupies most of the current Internet bandwidth. Modeling the behaviors of P2P file sharing systems is important for designing and evaluating such systems. In this paper, we develop a novel model to character the dynamic behaviors of P2P sharing systems. States in microcosmic view are defined and used to describe the interaction among the peers in systems. Then, a model in general form for P2P sharing systems is proposed. According to common software policies in P2P systems, we embody the model. To verify the validity and reasonability of the proposed model, P2P simulations are conducted. © 2010 IEEE.

关键词： Dynamic models

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Distributed multi-agent Q-learning for joint channel allocation and power control in cognitive radio networks

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Journal of Computational Information systems 2012年第17期8卷 7071-7078页

作者： Boumediene, Latifa Gao, Zhenguo Liu, Sheng College of Automation Harbin Engineering University Harbin 150001 China Key Laboratory of System Control and Information Processing Ministry of Education Shanghai 200240 China State Key Lab. for Novel Software Technology Nanjing University Nanjing 210093 China

This paper deals with the resource allocation in completely distributed cognitive radio network. We propose a form of real-time multi-agent distributed reinforcement learning, which is known as Q-learning, to allow the cognitive radio to predict its transmit power and channel, in order for achieving a high quality of service without affecting the primary users. Simulation results reveal that the proposed approach is able to significantly reduce the interference to the licensed users while maintaining a high probability of successful transmission in a cognitive radio ad-hoc network. © 2012 Binary Information Press.

关键词： Cognitive radio

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