检索结果-内蒙古大学图书馆

design OF VEHICLE POWER TRANSMISSION-SYSTEMS

JOURNAL OF MECHANICAL design 1995年第B期117卷 113-120页

作者： FREEMAN, JS VELINSKY, SA Department of Mechanical Engineering and Center for Computer-Aided Design The University of Iowa Iowa City IA 52242-1000 Department of Mechanical and Aeronautical Engineering University of California Davis Davis CA 95616-5294

The power transmission system is a critical component of any machine. Accordingly, the detailed analysis of this system is essential for both design purposes and the detailed assessment of machine performance. Due to the large number of possible power transmission system components and the nature of these systems, general power transmission system analysis methods have been difficult to develop. However, such analysis methods could meet a wide variety of needs for system design. This paper discusses the general power transmission system analysis approach developed by the authors over the last several years based on their study of vehicle powertrains. The formulation and solution of the governing equations are discussed, and the ability of the approach in addressing critical design related issues is demonstrated through an example system simulation.

关键词： Machinery Systems analysis Vehicles Simulation design Equipment performance

来源：评论

学校读者我要写书评

暂无评论

design of vehicle power transmission systems

引用

Journal of Vibration and Acoustics, Transactions of the ASME 1995年第B期117卷 113-120页

作者： Freeman, J.S. Velinsky, S.A. Department of Mechanical Engineering and Center for Computer-Aided Design University of Iowa Iowa City IA 52242-1000 United States Department of Mechanical and Aeronautical Engineering University of California Davis CA 95616-5294 United States

关键词： Machinery Systems analysis Vehicles Simulation design Equipment performance

来源：评论

学校读者我要写书评

暂无评论

Variance of quantization error at the output of recursive digital filter

Variance of quantization error at the output of recursive di...

引用

URSI International Symposium on Signals, Systems, and Electronics (ISSSE)

作者： G. Mollova Department of Computer Aided Design Higher Institute of Architecture & Civil Engineering Sofia Bulgaria

A new analytical expression for the variance of resulting quantization error at the output of a recursive cascade filter is proposed. The final results are given according to the filter's type and its order (even or odd). A design methodology for optimal recursive filters with minimum resulting error is presented aimed also to facilitate the computational process. A detailed numerical example is given, too.

关键词： Quantization Digital filters Chebyshev approximation Transfer functions Analysis of variance Circuits Civil engineering design methodology Dynamic programming Minimax techniques

来源：评论

学校读者我要写书评

暂无评论

A fuzzy-based distributed load balancing algorithm for large distributed systems

A fuzzy-based distributed load balancing algorithm for large...

引用

International Symposium on Autonomous Decentralized Systems (ISADAS)

作者： Chulhye Park J.G. Kuhl Center for Computer Aided Design and Department of Electrical and Computer Engineering University of Iowa Iowa IA USA

The paper presents a new approach to load balancing for large distributed systems. The approach characterizes the global state uncertainty inherent in a large distributed system in terms of the fuzzy set theory and presents a fuzzy-based distributed load balancing algorithm that explicitly reflects the effect of the uncertainty in the decision making process. The notion of linguistic variables is used to model state variables that have imprecise and uncertain state values and fuzzy control to estimate the amount of consistency relaxation from the states of uncertainty sources. A fuzzy-based consistency model provides a mechanism that allows each node to make flexible scheduling and state update decisions based on the estimated degree of consistency relaxation. Simulation results show that the proposed algorithm yields a better performance, substantially reduces the number of messages required, and generally transfers fewer tasks, compared to two conventional distributed load balancing algorithms.< >

关键词： Load management Uncertainty State estimation Fuzzy set theory Decision making Fuzzy control

来源：评论

学校读者我要写书评

暂无评论

Automated Optimal design of Mechanical Conformational Switches

引用

Artificial Life 1995年第2期2卷 129-156页

作者： Kazuhiro Saitou Mark J. Jakiela Computer-Aided Design Laboratory Department of Mechanical Engineering Massachusetts Institute of Technology 77 Massachusetts Avenue Room 3-46la Cambridge MA 02139 USA. kazu@mit.edu Computer-Aided Design Laboratory Department of Mechanical Engineering Massachusetts Institute of Technology 77 Massachusetts Avenue Room 3-46la Cambridge MA 02139 USA. jakiela@mit.edu

Bacteriophage viruses spontaneously self-assemble in the presence of their component parts (certain protein molecules). It is believed that conformational switches, interacting chemical bonding sites that allow tentative incorrect bonds, facilitate this randomized assembly process. A one-dimensional conformational switch is proposed and used to study the randomized assembly of mechanical parts. A genetic algorithm is used to search the space of parameterized switch designs to maximize the rate of a desired assembly.

关键词：

来源：评论

学校读者我要写书评

暂无评论

PARALLEL AND DISTRIBUTED TLM computation WITH SIGNAL-PROCESSING FOR ELECTROMAGNETIC-FIELD MODELING

引用

INTERNATIONAL JOURNAL OF NUMERICAL MODELLING-ELECTRONIC NETWORKS DEVICES AND FIELDS 1995年第3-4期8卷 169-185页

作者： SO, PPM ESWARAPPA, C HOEFER, WJR NSERC/MPR Teltech Research Chair in RF Engineering Department of Electrical and Computer Engineering University of Victoria Victoria British Columbia V8W 3P6 Canada Poman So received his B.Sc. degree in computer science and physics from the University of Toronto Toronto Onatario Canada in 1985. He obtained his B.A. Sc. and M.A.Sc. degrees in electrical engineering (summa cum laude) from the University of Ottawa Ottawa Ontario Canada in 1987 and 1989 respectively. Mr So was a research engineer in the University of Ottawa from January 1989 to October 1991 his research interests included CAD techniques of microwave circuits and numerical methods for electromagnetic wave modelling. He specialized in the development of electromagnetic engineering CAD software and successfully implemented a number of electromagnetic wave simulators based on the two-dimensional and three-dimensional transmission-line matrix methods. From August 1990 to February 1991 he accompanied Professor W. J. R. Hoefer to Rome Italy and Sophia Antiopolas France. During that time he implemented a parallel version of the 3D-TLM simulator for the CM-2 Connection Machine using C-Star and X Windows Library. He is a research engineer and a Ph.D. student at the University of Victoria Victoria British Columbia Canada. He ported the 2D- and 3D-TLM simulators to DECmpp 1200 massively parallel computer using MPL C and C++. He also combined OSA90/hope a commercially available microwave CAD program with a 2D-TLM simulation module for geometry optimization using the Datapipe technique of OSA90/hope. Recently he has developed a distributed client-server computing technique for the TLM method this technique could accelerate the TLM simulation by more than an order of magnitude. Channabasappa Eswarappa received the M.Tech. degree in electrical engineering from the Indian Institute of Technology Kanpur India in 1983 and Ph. D. degree from the University of Ottawa Canada in 1990. He worked as an Assistant Executive Engineer and later as

This paper describes the implementation of transmission-line matrix (TLM) method algorithms on a massively parallel computer (DECmpp 12000), the technique of distributed computing in the UNIX environment, and the combination of TLM analysis with Prony's method as well as with autoregressive moving average (ARMA) digital signal processing for electromagnetic field modelling. By combining these advanced computation techniques, typical electromagnetic field modelling of microwave structures by TLM analysis can be accelerated by a few orders of magnitude.

关键词： Mathematical models

来源：评论

学校读者我要写书评

暂无评论

Windows computer laboratory as a tutorial for undergraduate electromagnetics

引用

computer Applications in engineering Education 1995年第3期3卷 183-183页

作者： McCulloch, J. Keddy, W.A. Stuchly, M.A. University of Victoria Department of Electrical and Computer Engineering University of Victoria Victoria British Columbia Canada Janet McCulloch:is a native of Toronto Canada where she briefly attended both York University and the University of Toronto before she set off on a year-long adventure through the Middle East and North Africa. When she returned to Canada she relocated to California. She spent a number of years living both in Los Angeles and coastal Northern California interspersed with several extended trips through the United States Mexico and Central America. Ms. McCulloch moved to Victoria British Columbia in 1989 and a year later registered in the cooperative education program in Electrical Engineering at the University of Victoria. She is presently in the fifth and final year of the program and has her sights set on graduate school. Besides the work described in this article she has been very much involved in the use of technology to assist in the delivery of curriculum at the senior secondary level. She lives on a country property a half-hour from the University with her husband her horse and three cats. W. Alfred Keddy:is an applications programmer/analyst for the Department of Electrical and Computer Engineering at the University of Victoria. He received a BEng (1988) in Electrical Engineering and an MASc (1994) from the University of Victoria. His research interests include distributed systems image processing local area networks VLSI and DSP system design for computation and communication and human–computer interface design. Maria A. Stuchly:received an MSc in Electrical Engineering in 1962 from Warsaw Technical University and a PhD in Electrical Engineering from the Polish Academy of Sciences in 1970. Between the years of 1962 and 1970 she was with the Warsaw Technical University an Institute of the Polish Academy of Sciences. After immigrating to Canada during 1970 her first position was with the University of Manitoba. In 1976 she became employed by the Bureau of Radi

Contents and implementation of a computer laboratory for undergraduate electromagnetics are described. The laboratory consists of four 3-hour sessions covering vector calculus, Maxwell's equations (integral and differential forms), wave propagation in materials, and wave behavior at planar interfaces. Each session contains theory (in the Help file), animations (where relevant) and a quiz. The program runs on IBM compatible 486-based PCs in a Windows environment and uses the Borland C ++ 4.0 compiler.

关键词：

来源：评论

学校读者我要写书评

暂无评论

CONCURRENT LARGE-SIGNAL SIMULATION OF AN ACTIVE MICROSTRIP ANTENNA

引用

INTERNATIONAL JOURNAL OF NUMERICAL MODELLING-ELECTRONIC NETWORKS DEVICES AND FIELDS 1995年第1期8卷 3-12页

作者： MCDOWALL, DS FUSCO, VF High Frequency Electronics Laboratory. Department of Electrical and Electronic Engineering The Queen's University of Belfast Ashby Building Stranmillis Road Belfast BT9 5AH U.K. D. Stewart McDowall was born in Dublin Republic of Ireland in 1967. He received the M. Eng. degree in Electrical and Electronic Engineering from the Queen's University of Belfast in 1990. In the same year he was presented with a Distinction Award from the Departmnet of Education of Northern Ireland and he is currently pursuing his Ph.D. in the Microwave Research Group at Q.U.B. His principal research area is the electromagnetic field mapping of microwave systems using concurrent programming. He is an Associate Member of the Institute of Electrical Engineers. Vincent F. Fusco was educated at the Queens's University of Belfast where he obtained the degree of Ph.D. in 1982. He has worked as a research engineer on short-range radar and radio telemetry systems. Currently he is a reader in Microwave Communications in the School of Electrical engineering and Computer Science the Queen's University of Belfast. His current research interests include non-linear microwave circuit simulatino and concurrent programming techniques for electromagnetic field problems with particular emphasis on EMC applications. He has published numerous research papers in these areas. He is the author of the bookMicrowave Circuits Analysis and Computer Aided Design Prentice-Hall 1987. Dr Fusco is a Chartered Electrical Engineer and a Member of the Institute of Electrical Engineers.

This paper details the use of a circuit-based EM modelling technique combined with a harmonic balance simulator used to model the radiation from the microstrip bodies comprising an active antenna circuit. The modelling approach adopted for the planar bodies in the circuit will be shown to allow the use of concurrent algorithms in order to reduce overall computational time.

关键词： Microstrip antennas

来源：评论

学校读者我要写书评

暂无评论

GENETIC ALGORITHMS AS AN APPROACH TO CONFIGURATION AND TOPOLOGY design

引用

JOURNAL OF MECHANICAL design 1994年第4期116卷 1005-1012页

作者： CHAPMAN, CD SAITOU, K JAKIELA, MJ Computer-Aided Design Laboratory Department of Mechanical Engineering Massachusetts Institute of Technology Cambridge MA 02139

The genetic algorithm, a search and optimization technique based on the theory of natural selection, is applied to problems of structural topology design. An overview of the genetic algorithm will first describe the genetics-based representations and operators used in a typical genetic algorithm search. Then, a review of previous research in structural optimization is provided. A discretized design representation, and methods for mapping genetic algorithm ''chromosomes'' into this representation, is then detailed. Several examples of genetic algorithm-based structural topology optimization are provided: we address the optimization of cantilevered plate topologies, and we investigate methods for optimizing finely-discretized design domains. The genetic algorithm's ability to find families of highly-fit designs is also examined. Finally, a description of potential future work in genetic algorithm-based structural topology optimization is offered.

关键词： Structural optimization Optimization design Genetic algorithms Topology Algorithms

来源：评论

学校读者我要写书评

暂无评论

Stochastic performance models of parallel task systems 94

Stochastic performance models of parallel task systems

引用

Proceedings of the 1994 ACM Sigmetrics Conference on Measurement and Modeling of computer Systems

作者： Tayyab, Athar B. Kuhl, Jon G. Center for Computer Aided Design and Department of Electrical & Computer Engineering The University of Iowa Iowa City IA

ISBN: (纸本)9780897916592

This paper considers the class of parallel computations represented by directed, acyclic task graphs. These include parallel loops, multiphase algorithms, partitioning and merging algorithms, as well as any arbitrary parallel computation that can be structured by a task graph. The paper reviews the current state of the art in stochastic bound models of parallel programs and presents new stochastic bound performance models that predict the expected execution time of parallel programs on a given shared-memory multiprocessor system; and provide qualitative and quantitative description of the relationships between the structure of parallel programs, computation and synchronization behavior of the program, and architectural features of the underlying multiprocessor *** models use a new formulation based on stochastic bound analysis and are solvable for a number of distribution functions. They are applicable to shared-memory multiprocessors with significantly different architectural and synchronization performance characteristics. The accuracy of the models is validated via several measurements on two different shared-memory multiprocessor systems, the Alliant FX/2800 and the Encore Multimax. The results show the models to be quite accurate, even when some of the modeling assumptions are violated. The maximum error of prediction ranges from about 10% to under 1%.

关键词：

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：