检索结果-内蒙古大学图书馆

Wireless Ad hoc network security multi-path routing protocol survivability modeling research

Sensors and Transducers 2013年第10期157卷 173-179页

作者： Chen, Hongsong Fu, Zhongchuan Shang, Xuewei Ye, Fei School of Computer and Communication Engineering University of Science and Technology Beijing Beijing 100083 China School of Computer Science and Technology Harbin Institute of Technology Harbin 150001 China Beijing Kedong Electric Power Control System Co. Ltd Beijing 100192 China

Network survivability is the key ability of ad hoc network under all kinds of attacks, which is a foundation to the design and evaluation of wireless ad hoc network routing protocol. The definitions of network survivability are analyzed and compared. We propose a novel survivability model based on Finite State Machine (FSM) and District Time Markov Chain (DTMC) model. DTMC steady-state probabilities are theoretically deduced and computed. Performance Evaluation Process Algebra (PEPA) is used to decribe the state transition model, PEPA Eclipse Plug-in software is used to compute the steady-state probabilities. We find that the steadystate probabilities computed by PEPA software match well with the formula derivation. Experiment results show that G steady-state probability decreases with the increasing transition probability of attack state. Finally, we validate the proposed model by PEPA simulations and numerical analysis. © 2013 IFSA.

关键词： Routing protocols

来源：评论

学校读者我要写书评

暂无评论

Two-End Fault Location on Long Transmission Lines With In-Line Shunt Reactors

Two-End Fault Location on Long Transmission Lines With In-Li...

引用

IEEE Grenoble powerTech Conference

作者： Maciej Kawa Jan Izykowski Power System Control Division Schneider Electric Energy Poland Swiebodzice Poland Institute of Electrical Power Engineering Wroclaw University of Technology Wroclaw Poland

ISBN: (纸本)9781467356688

This paper deals with fault location on long transmission lines with in-line shunt reactors. It is considered that three-phase voltages and currents from both line ends sampled synchronously or asynchronously are processed. A new algorithm (Algorithm II) is presented. It is formulated for phasors and its distinctive feature relies in no requiring the shunt reactor status and parameters. This algorithm has been tested and compared with the algorithm already known from a literature (Algorithm I) for which the reactor parameters are to be known. The evaluation has been carried out using signals taken from ATP-EMTP versatile simulations of faults on the test transmission line. The sample results of the evaluation are presented and discussed.

关键词： Algorithm design and analysis fault location power system faults power system simulation transmission lines.

来源：评论

学校读者我要写书评

暂无评论

Co-simulation of a marine electrical power system using powerFactory and MATLAB/Simulink

Co-simulation of a marine electrical power system using Powe...

引用

IEEE Electric Ship Technologies Symposium, ESTS

作者： Xin Kong Xiaoxiao Yu Ricky R. Chan Meng Yeong Lee Experimental Power Grid Center Institute of Chemical and Engineering Science ASTAR Singapore Electrical Power and Control System Advanced Technology Center Rolls-Royce Singapore Pte. Limited Singapore

In this work, an approach to co-simulate a marine electrical power system is set forth using powerFactory and MATLAB/Simulink. Although MATLAB/Simulink is one of the well-known simulation tools to design and simulate marine power modules, it lacks the features for comprehensive power system analysis, which are offered by powerFactory. In this paper, a methodology is proposed to map the MATLAB/Simulink power system module model as an object in powerFactory environment. This approach offers the benefits of exploiting the features of both platforms as well as the potential reduction in development time and costs by recycling available models.

关键词： Mathematical model MATLAB Analytical models Generators Integrated circuit modeling Load modeling

来源：评论

学校读者我要写书评

暂无评论

Boiler drum-level control using QFT

Boiler drum-level control using QFT

引用

Nirma University International Conference on engineering (NUiCONE)

作者： P. U. Sunil Jayesh J Barve P. S. V Nataraj GE Power and Water HTC Hyderabad India GE Global Research Center GEITC Bangalore India System and Control Engineering Department Indian Institute of Technology Bombay Mumbai

In this work, SISO Quantitative Feedback Theory (QFT) technique is used to synthesize a regulatory feedback controller for a robust control of boiler drum-level considering boiler operation across multiple operating points. A simplified linear model is developed using a step test data generated from the boiler simulator based on the semi-distributed nonlinear model. Model parameter uncertainty is considered based on the model-parameter variations across linearized plant-set obtained across different operating point across transient operation. The feedback controller is designed to meet desired disturbance rejection specification. The design is verified through extensive simulations in time domains with several plants picked from the plant-set and simulation results are discussed. The performance of QFT controller is compared and found better against PI controller tuned for the same disturbance rejection specs.

关键词： Mathematical model Boilers Robustness control design Robust control Data models Solid modeling

来源：评论

学校读者我要写书评

暂无评论

An extension of distributed dynamic description logics for the representation of heterogeneous mappings

Journal of Software

引用

Journal of Software 2013年第1期8卷 243-250页

作者： Wang, Zhuxiao Guo, Jing Chen, Fei Wu, Kehe Wang, Peng School of Control and Computer Engineering State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University 102206 Beijing China National Computer Network Emergency Response Technical Team Coordination Center of China 100029 Beijing China School of Control and Computer Engineering North China Electric Power University 102206 Beijing China Institute of Information Engineering Chinese Academy of Sciences 100195 Beijing China

As a family of dynamic description logics, DDL(X) is constructed by embracing actions into the description logic X, where X represents well-studied description logics ranging from the ALC to the SHOIQ. To efficiently support automated interoperability between ontology-based information systems in distributed environments, we have to design an expressive mapping language to semantically understand resources from remote and heterogeneous systems. Distributed Dynamic Description Logics D3L(X) is a natural generalization of the DDL(X) framework, which is designed to model the distributed dynamically-changing knowledge repositories interconnected by semantic mappings and to accomplish reasoning in distributed, heterogeneous environments. In this paper, we propose an extension of Distributed Dynamic Description Logics D3L(X) and investigate the reasoning mechanisms in D3L(X). © 2013 ACADEMY PUBLISHER.

关键词： Interoperability

来源：评论

学校读者我要写书评

暂无评论

Modeling and simulation of piezoelectric vibration generator for powering wireless sensor networks

引用

Sensors and Transducers 2013年第SPEC.ISSUE期22卷 133-138页

作者： He, Qing Lan, Lan Yan, Zhen Zhao, Xiaotong Du, Dongmei Key Laboratory of Condition Monitoring and Control for Power Plant Equipment School of Energy Power and Mechanical Engineering North China Electric Power University Beijing 102206 China Sinohydro Renewable Energy Co. LTD Beijing 100048 China School of Mechanical and Electric Engineering Agricultural University of Hebei Baoding 071001 China Division of Electric Power System China Electric Power Research Institute Beijing 100192 China

Micro piezoelectric vibration generator with high energy density may provide infinite and continuous energy for wireless sensor network. In order to improve generating capacity under given dimension, aiming at external force and displacement incentive environment, mathematics model of piezoelectric cantilever generator generating capacity are established, and influence law of unimorph and bimorph piezoelectric generator structural parameter on output voltage are analyzed by finite element simulation. The results show that on external force incentive environment, the output voltage increase linearly while length increase and decrease inverse proportion while width increase;on displacement incentive environment, the output voltage decrease while length increase and don't change while width vary;meanwhile, relation between thickness ratio and output voltage isn't affected by incentive environment, and bimorph piezoelectric generator with low thickness ratio should be selected at first for obtaining higher output voltage. © 2013 by IFSA.

关键词： Wireless sensor networks

来源：评论

学校读者我要写书评

暂无评论

Beyond-the-horizon detection of the surface objects using the 'Burevestnik ZG' radar

Beyond-the-horizon detection of the surface objects using th...

引用

2013 23rd International Crimean Conference Microwave and Telecommunication Technology, CriMiCo 2013

作者： Dzyuba, V.P. Dorichenko, A.D. Yeryomka, V.D. Zykov, A.F. Malyovanyi, O.Ye. Milinevskiy, L.P. Mytsenko, I.M. Piven', A.N. Prokopenko, O.I. Roenko, A.N. Roskoshnyi, D.V. SE Plant generator 18 Novokonstantinovskaya Str.. Kyiv 04080 Ukraine SE kyiv State Plant burevestnik 2 Zdolbunivska Str. 02081 Kyiv Ukraine O.Ya. Usykov Institute for Radiophysics and Electronics of NAS of Ukraine 12 Ac. Proskury Str. Kharkiv 61085 Ukraine Department of Hybrid Modeling and Control Systems in Power Engineering Pukhov Institute for Modeling in Energy Engineering NAS of Ukraine 15 Generala Naumova Str. Kyiv 03164 Ukraine Co Ltd. electrotekhnik- New Technology 26/2 Melnitskaya Str. Odessa 65005 Ukraine Administration State Border Service of Ukraine 26 Volodymyrivska Str. Kyiv 01601 Ukraine Institute Telecommunication System NTUU kPI 2 Industrial Lane Kyiv-56 03056 Ukraine

ISBN: (纸本)9789663354019

One of the problems in the area of radio wave propagation and radar design is creation of radar facilities for navigation in the regions of the World Ocean with intensive shipping. Ukrainian radio-electronic industry has a large experience in development of different purpose radar systems, one of that is the radar Burevestnik. This radar is used to control and observe marine surface situation on the naval border check-points of Ukraine. In the paper it is suggested to modernize radar Burevestnik-1 for navigation and beyond-the-horizon detection of the surface objects. The possibilities of Burevestnik ZG effective application for beyond-the-horizon detection of the surface objects in the districts of the World Ocean are estimated. To illustrate the latter the centimeter radio waves attenuation factor database, created in IRE NASU on the base of experimental results, is used. Statistical distribution functions of the Burevestnik ZG radar coverage range in the districts of the World Ocean are determined. Comparison with experimental data for stationary navigation radars Don, Nayada and MRL-5 is conducted. Finally a conclusion, that radar Burevestnik ZG can be used in the regions of the World Ocean for navigation and beyond-the-horizon detection of the surface objects, is made. © 2013 CriMiCo'2013 Organising Committee, CrSTC.

关键词： Radio waves

来源：评论

学校读者我要写书评

暂无评论

A design approach to building a pseudo-coherent high duty-cycle X- and Ka-band radar

A design approach to building a pseudo-coherent high duty-cy...

引用

2013 23rd International Crimean Conference Microwave and Telecommunication Technology, CriMiCo 2013

作者： Dzyuba, V.P. Dorichenko, A.D. Yeryomka, V.D. Zykov, A.F. Malyovanyi, O.Ye. Milinevskiy, L.P. Mytsenko, I.M. Piven', A.N. Prokopenko, O.I. Roenko, A.N. Roskoshnyi, D.V. SE Plant generator 18 Novokonstantinovskaya Str.. Kyiv 04080 Ukraine SE kyiv State Plant burevestnik 2 Zdolbunivska Str. Kyiv 02081 Ukraine O.Ya. Usykov Institute for Radiophysics and Electronics of NAS of Ukraine 12 Ac. Proskury Str. Kharkiv 61085 Ukraine Department of Hybrid Modeling and Control Systems in Power Engineering Pukhov Institute for Modeling in Energy Engineering NAS of Ukraine 15 Generala Naumova Str. Kyiv 03164 Ukraine Co Ltd. electrotekhnik- New Technology 26/2 Melnitskaya Str. Odessa 65005 Ukraine Administration State Border Service of Ukraine 26 Volodymyrivska Str. Kyiv 01601 Ukraine Institute Telecommunication System NTUU kPI 2 Industrial Lane Kyiv-56 03056 Ukraine

ISBN: (纸本)9789663354019

A nonconventional way of construction of two-frequency (X-and Ka-ranges) pseudo-coherent pulsed radar of high porosity is described. It is shown that the offered way can be applied both for creation of radar guidance systems of new generation in the millimeter range of wavelengths, and for modernization of operating pulsed radars of the centimeter range. © 2013 CriMiCo'2013 Organising Committee, CrSTC.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Fault classification rules extraction of wind turbine based on C4.5 algorithm

Fault classification rules extraction of wind turbine based ...

引用

Prognostics and Health Management Solutions Conference - PHM: Driving Efficient Operations and Maintenance, MFPT 2012

作者： Chen, Jie Jiang, Dongxiang Yang, Wenguang Deng, Xiaowen Feng, Yongxin State Key Laboratory of Control and Simulation of Power System and Generation Equipments Department of Thermal Engineering Tsinghua University Beijing 100084 China Electric Power Institute Guangdong Grid Company Guangzhou 510080 China

Distinguishing fault types in early time can prevent wind turbines from breaking down. C4.5 algorithm, different from ID3 algorithm, which can deal with continuous parameters, should be a choice fault diagnosis method of wind turbine. This paper strives to extract fault classification rules of wind turbine based on data collected from a small wind turbine in laboratory using C4.5 decision tree and validate the rules extracted using another set of data. According to the solution, fault types such as mass imbalance of rotor, aero-dynamic asymmetry, yaw misalignment, gearbox and bearing fault and so on can be distinguished by the method presented in this paper.

关键词： Wind turbines

来源：评论

学校读者我要写书评

暂无评论

A design approach to building a pseudo-coherent high duty-cycle X- and Ka-band radar

A design approach to building a pseudo-coherent high duty-cy...

引用

International Crimean Conference on Microwave & Telecommunication Technology

作者： V.P. Dzyuba A.D. Dorichenko V.D. Yeryomka A.F. Zykov O.Ye. Malyovanyi L.P. Milinevskiy I.M. Mytsenko A.N. Piven' O.I. Prokopenko A.N. Roenko D.V. Roskoshnyi SE plant «Generator» 18 Novokonstantinovskaya Str.. Кyiv 04080 Ukraine SE «Kyiv state plant «Burevestnik» 2 Zdolbunivska Str. 02081 Ukraine O.Ya. Usykov Institute for Radiophysics and Electronics of NAS of Ukraine 12 Ac. Proskury Str. Kharkiv 61085 Ukraine The Department of Hybrid Modeling and Control Systems in Power Engineering of Pukhov Institute for Modeling in Energy Engineering NAS of Ukraine 15 Generala Naumova Str. Kyiv 03164 Ukraine Co Ltd. «Electrotekhnik- New Technology» 26/2 Melnitskaya Str. Odessa 65005 Ukraine Administration State Border Service of Ukraine 26 Volodymyrivska Str. Kyiv 01601 Ukraine Institute telecommunication system NTUU «KPI» 2 Industrial Lane Kyiv-56 03056 Ukraine

A nonconventional way of construction of two-frequency (X - and Ka-ranges) pseudo-coherent pulsed radar of high porosity is described. It is shown that the offered way can be applied both for creation of radar guidance systems of new generation in the millimeter range of wavelengths, and for modernization of operating pulsed radars of the centimeter range.

关键词： Radar Microwave oscillators Microwave technology Publishing Cathodes Communications technology Conference proceedings

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：