检索结果-内蒙古大学图书馆

8th US National conference on Earthquake Engineering 2006

作者： Wang, Y. Dargush, G.F. Goldreich Engineering 45 East 20th Street New York NY 10003 United States Dept. of Civil Structural and Environmental Engineering University at Buffalo Buffalo NY 14260 United States

ISBN: (纸本)9781615670444

Despite promising development in the optimization of passive control system in building structures, recent research efforts usually consider two-dimensional plane frame structures using lumped mass models. As buildings are threedimensional in geometry, it is necessary to carry out the optimization in three dimensions rather than in two dimensions. In this study, three-dimensional building structures are represented in a more realistic pattern by using threedimensional finite element models rather than lumped mass models. Dynamic analysis of such three-dimensional finite element models added with passive damping devices is studied first. Genetic algorithm is then used to determine the optimal configuration of passive control system. A numerical example of an irregular three-dimensional building frame structure presented demonstrates that an effective computational framework for the optimization of passive control system in three-dimensional buildings is established in this study by combining the versatile genetic algorithm and efficient dynamic analysis methods.

关键词： Genetic algorithms

来源：评论

学校读者我要写书评

暂无评论

Online minimum-copper-loss control of an interior permanent-magnet synchronous machine for automotive applications

引用

IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS 2006年第5期42卷 1222-1229页

作者： Jeong, Yu-Seok Sul, Seung-Ki Hiti, Silva Rahman, Khwaja M. Myongji Univ Dept Elect Engn Yongin 449728 South Korea Seoul Natl Univ Sch Elect Engn & Comp Sci Seoul 151744 South Korea Gen Motors Ctr Adv Technol Torrance CA 90505 USA Gen Motors Hybrid Power Train Engn Troy MI 48083 USA

this paper presents an algorithm to calculate the current references on line, considering the inherent nonlinear nature of the saturation effect in an interior permanent-magnet synchronous machine for the minimum-copper-loss control under the current and voltage limit of the drive system. this paper basically approaches this issue as a nonlinearly constrained optimization problem where the torque command imposes the nonlinear equality constraint and the voltage limit imposes the nonlinear inequality constraint. Depending on the operating region, it solves the corresponding set of nonlinear equations in real time derived from the Lagrange multiplier method. Newton's method among various techniques is adopted to implement the numerical solution. this scheme gives accurate results not only in motoring but also in generating operation of the machine, since the voltage drop of the stator resistance is taken into account, which is hardly applicable to a two-dimensional lookup table where the inputs are the torque command and the maximum flux amplitude, and the output is each axis current reference in the rotor reference frame. the simulation and experimental results show the feasibility and performance of the proposed technique.

关键词： constrained optimization minimum copper loss Newton's method saturation

来源：评论

学校读者我要写书评

暂无评论

Reliability-based pareto optimum design of robust compensators for a dynamic system with parametric uncertainty

Reliability-based pareto optimum design of robust compensato...

引用

20th European Simulation and Modelling conference (ESM 2006)

作者： Nariman-Zadeh, Nader Hajiloo, Amir Jamali, Ali Bagheri, Ahmad Alasti, Aria Univ Guilan Fac Engn Dept Mech Engn POB 3756 Rasht Iran Sharif Univ Fac Mech Engn Tehran Iran

ISBN: (纸本)9789077381304

A reliability-based approach for the Pareto optimum design of robust compensators for a dynamic system with probabilistic uncertainty is presented. In this way, some non-dominated optimum robust compensators in the Pareto sense are found using four non-commensurable objective functions both in time and frequency domains based on stochastic behavior of a system with parametric uncertainties. It is shown that multi-objective Pareto optimization of such robust compensators using a recently developed diversity preserving mechanism genetic algorithm unveils some very important and informative trade-offs among these objective functions.

关键词： uncertain systems robust compensator reliability multi-objective optimization genetic algorithm pareto

来源：评论

学校读者我要写书评

暂无评论

thermalhydraulic modeling and analysis of candu shutdown cooling system

Thermalhydraulic modeling and analysis of candu shutdown coo...

引用

20th European Simulation and Modelling conference (ESM 2006)

作者： Prisecaru, Ilie Dupleac, Daniel Iulian, Nita Univ Politehn Bucuresti Power Plant Engn Fac Sect 6 313 Splaiul Independente Bucharest 060042 Romania Ctr Engn & Technol Nucl Object Bucharest Romania

ISBN: (纸本)9789077381304

the paper presents the mathematical model and thermal-hydraulic analysis of CANDU Shutdown Cooling system (SDCS). the mathematical model for the SDCS equipments was developed. Initially these mathematical models were coded in ACSL simulation language then have been implemented in the Modular modeling system (MMS) code using the CompGen tools. there are two options for the SDCS operation with different flow path configuration. Essentially, for each option, the thermal regime is time dependent but the flow regime is time independent. therefore, for the thermal-hydraulic analysis of the system two steps were used. In the first step the flow along the system pipes was determined for each operation stage with the PIPENET code. Subsequently, in the second step, the models developed were used to predict the thermal behavior of reactor core. the results obtained for the cooling of the Primary Heat Transport system (PHTS) from 177 degrees C to 54 degrees C are presented.

关键词： nuclear engineering model development model evaluation lumped parameter continuous simulation

来源：评论

学校读者我要写书评

暂无评论

From systems to Plectics: the Challenge of systemic Inquiry in Measurement, Modelling and Pedagogy

From Systems to Plectics: The Challenge of Systemic Inquiry ...

引用

2006 IEEE International conference on Computational Cybernetics, ICCC

作者： Pátkai, Béla Rudas, Imre J. Tar, József K. Institute for Manufacturing University of Cambridge Mill Lane Cambridge CB2 1RX United Kingdom Institute of Intelligent Engineering Systems Budapest Tech Bécsi út 96/B H-1034 Budapest Hungary

ISBN: (纸本)1424400716

this paper briefly reviews some of the most prominent systems theories from the 20th century and supports the arguments of Murray Gell-Mann who proposed the use of "plectics" instead of the overused and ambiguous "systems science" and "systems theories" terms. It is claimed that measurement of complex systems is essentially a modeling task as the boundaries between the specific steps of the scientific method are necessarily blurred. A critical and extended interpretation of the scientific method, systems modeling and addressing the difficulty of teaching systems science-related disciplines completes the arguments for an integrated, truly systemic view of this field. © 2006 IEEE.

关键词： system theory

来源：评论

学校读者我要写书评

暂无评论

Self-organization simulation over geographical information system based on multi-agent platform

Self-organization simulation over geographical information s...

引用

20th European Simulation and Modelling conference (ESM 2006)

作者： Ghnemat, Rawan Bertelle, Cyrille Duchamp, Gerard H. E. Univ Havre LITIS EA 4051 25 Rue Philippe LebonBP540 F-76058 Le Havre France Paris XIII Univ LIPN UMR 7030 CNRS F-93430 Villetaneuse France

ISBN: (纸本)9789077381304

In this paper, we present a review concerning the coupling of Geographical Information system with agent-based simulation. With the development of new technologies and huge geographical databases, the geographers now deal with complex interactive networks which describe the new Geopolitics and world-wide Economy. the aim is to implement some self-organization processes that can emerge from these complex systems. We explain how we can today model such phenomena and how we can implement them in a practical way.

关键词： GIS self-organization individual-based model (IBM) agent-based modeling and simulation (ABMS)

来源：评论

学校读者我要写书评

暂无评论

the simulation of the economic effect of power system structure including renewable sources of energy

The simulation of the economic effect of power system struct...

引用

20th European Simulation and Modelling conference (ESM 2006)

作者： Sroczan, Eugeniusz M. Poznan Univ Tech Elect Power Engn Inst PL-60965 Poznan Poland

ISBN: (纸本)9789077381304

the optimal load of the power system (PS) sources depends on the structure of committing sources, that might affect the generation costs in the given power network. the expected costs of energy for the given wholesale providers and power plants are calculated using some simulation procedures, assuming the varied structure of sources- types of power plants. In the short time period the results support the real time operation of PS. Over a longer time they enable the definition of the optimal policy of changing or modernizing the power structure. Operation of an example set of the discussed power plants, including all types of primary energy sources and converters, including also the pumped storage hydroelectric plant (PSHP) and wind power plants (WPP), is described in accordance with the balance of the load in the PS. Upon the base of the developed simulator, the mode of operation the sources load is based on the minimization of the cost of generated energy. the structure of the simulator (Sroczan 2005) consists of some procedures which simulate the generation policy and procedures checking the economic quality of balancing the generation and demand of electric power and energy in the discussed PS.

关键词： energy management computer aided analysis decision support system interactive simulation optimization

来源：评论

学校读者我要写书评

暂无评论

ESM 2006 - 2006 European Simulation and Modelling conference: Modelling and Simulation 2006

ESM 2006 - 2006 European Simulation and Modelling Conference...

引用

20th European Simulation and Modelling conference, ESM 2006

ISBN: (纸本)9077381309

the proceedings contain 82 papers. the topics discussed include: a formal method for the sequential untimed subset of systemC;process interaction diagrams for structured discrete event simulation modeling;contextual testing of interactive product simulations for new generation products;simulation model interoperability in support of complex organisation design and change;the simulation of the economic effect of power system structure including renewable sources of energy;event simulation of supply chain networks - dynamic detailing in the material flow simulator d3FACT insight;a queuing network model of patient flow in an ancient and emergency department;reliability based Pareto optimum design of robust compensators for a dynamic system with parametric uncertainty;expand scope of traffic flow analysis: entity flow-phase analysis for rapid performance evaluation of enterprise process system;and transient analysis of semi-Markovian switching systems in telecommunication networks.

关键词：

来源：评论

学校读者我要写书评

暂无评论

An applied optimization framework for distributed air transportation environments

An applied optimization framework for distributed air transp...

引用

17th International conference on Database and Expert systems Applications

作者： Castelli, thomas Lee, Joshua Naqvi, Waseem Raytheon Co Network Centr Syst Marlborough MA 01752 USA

ISBN: (纸本)3540378715

In a large-scale dynamic system with multiple distributed entities, each with their own set of interests, there is a need to find a globally acceptable and optimal solution state. this solution state is, by definition, efficient to all entities with respect to their own individual goals and to the system as a whole. In these dynamic environments, this solution state can be achieved by utilizing software techniques from the field of game theory in order to make optimal decisions. We present an application built upon a generalized optimization framework that can be applied to a number of domains, such as cargo or network traffic algorithms. In this research, we used a market-based approach to air traffic flow management through a modeling and simulation environment. the aim is to allow individual aircraft a certain degree of local autonomy, much like cars on a highway. Our system is able to cope in real time with failures such as node loss and adjust system parameters accordingly to optimize results based on the goals of the involved agents. We describe tradeoffs between different agent interaction frameworks with respect to their performance in market mechanism auctions. We also discuss lessons learned while implementing this application. this research has built upon our previously reported work [20, 21] on route optimizations and airspace sector design in an air traffic control network, by adding in the goals of interested entities, e.g. airlines, aircraft, and airports, maximizing the "payoff"to each player (agent). It is intended that the results of our work will be directly used in this domain. In addition, we envision our work being leveraged for other optimization tasks such as data traffic on a network, first responder / disaster relief efforts, and other tasks where rapid solving of large-scale optimization problems is essential.

关键词： Distributed computer systems

来源：评论

学校读者我要写书评

暂无评论

On optimization and parallelization of fuzzy connected segmentation for medical imaging

On optimization and parallelization of fuzzy connected segme...

引用

20th International conference on Advanced Information Networking and Applications

作者： Gammage, Christopher Chaudhary, Vipin Computer Science Dept. Wayne State University Detroit MI Institute for Scientific Computing Wayne State University Detroit MI

ISBN: (纸本)0769524664

Fuzzy Connectedness is an important image segmentation routine for image processing of medical images. It is often used in preparation for surgery and sometimes during surgery. It is important to have an algorithm which can execute very fast, especially in the intra-operative environment. We have taken code from a popular image processing toolkit called ITK and ported it to a C environment. We optimized the implementation to give maximal performance (giving speedup of 23 times). We attempted three different levels of parallelization. We found that MPI was not an efficient method of parallelization as the algorithm is data dependant and large amounts of communication must be done. this communication overshadows the speed increase from doing computation on multiple processors, or nodes in a cluster. However, some limited speedup over the optimizations was obtained using OpenMP on an SMP system leading to a speedup of fifty using four processors over the original ITK implementation. © 2006 IEEE.

关键词： Image segmentation

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：