检索结果-内蒙古大学图书馆

Numerical simulation of induction heating: A finite‐element approximation

European Transactions on electrical Power 1993年第5期3卷 339-345页

作者： Conraths, H.‐J. Dr.-Ing. Hermann-Josef Conraths (1961) received his degree in Electrical Engineering (Dipl.-Ing.) from the RWTH Aachen/Germany in 1987. He was a member of the Prof.-Dr.-Koepchen-Endowment of the RWE AG Essen/Germany. After having finished his studies he joined the scientific staff of the Institute for Electrical Machines (IEM) of the RWTH Aachen from 1987 until 1992. In June 1992 he received his Dr.-Ing. degree. He was awarded the Borchers-Badge of the RWTH for his doctoral thesis from which the present paper is a short extract. Since January 1993 he is with the Siemens AG. Niirnberg/Germany. His fields of interest are electrical drives the design of electromagnetic systems their computer simulation and in general numerical methods in electrical engineering. (Siemens AG Numberger Maschinen-und Apparatewerk Vogelweiherstr. 1-15 D-90441 Nürnberg T +911/433-4183 Fax +911/433-2386)

A precise knowledge about the electromagnetic field, the eddy currents and the temperature distribution is necessary to optimize induction heating devices which are used to heat up thin, moving metal strips in a continuous process. As this information cannot be gained from conventional, analytical methods, a new numerical simulation method, based on a finite‐element approximation, has been developed. The coupled electrical‐thermal process is modelled by a set of partial differential equations which are discretized using the Method of Weighted Residuals (Galerkin‐Method). The temperature dependency of the electrical and thermal conductivity as well as convection and radiation at the surface of the strip are included in the mathematical model. The validity of this numerical approximation is proved by the comparison of calculated and measured temperature distributions in two test cases. Finally, a simple example shows how the new method can be used in the analysis and optimization of the induction heating system. Copyright © 1993 John Wiley & Sons, Ltd.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Guest Editorial: Focus on Digital Signal Processing Techniques Applied to Space Communications

引用

European Transactions on Telecommunications 1993年第1期4卷 9-10页

作者： Gaudenzi, Riccardo De Elia, Carlo Harris, Robert A. Rimrdo De Gaudend was born in Rosignano Mmo Italy in 1960. He received the Doctor En- gineer degree (cum Laude) in Electronic Engineering from the University of Pisa. Italy in 1985. From 1986 he was with the European Space Agency (ESA). Stsliow and Communications Engineering Department. Darmrtadt (RFA) where he was involved in satellite telecommunication ground systems design and testing. In particular he followed the development of two new ESA's satellite tracking systems. In 1988 be joined the ESA's Research and Technology Centre (ESTEC). Noordwijk. The Netherlands where is holding a position as releeommunication enginm in the Electrical System Department. He is presently responsible for the definition and development of advanced satellite communication systems. His mull intenst b ddyrducd with effacnt digital modulation and access techniques for fued and mobile wtdlite services synchronization topics and communication systems simulation techniques. Carlo Elia (S'89) was born in Trepuzzi. Italy in 1964. He received the Doctor Engineer degree in Electronic Engineering from Politecnico di Torino. Torino. Italy. in 1989. He his now attending a Doctorate program at PolitanieO di Torino. S i 1990. he has been with the Eurpean Space Agency (ESA) in the Electrical System Department as Tdeeommunications Syrtcm Engineer. His main areas of interest are related to rdvanccd digital modulation and access techniques and channel equalization. R.A. (Bob) Harris (S'69–M'70) received the PhD from the University of Southampton. England in 1971. In 1970 he joined the European Space Agency (then ESRO). based at the European Space Research and Technology Centre (ESTEC) Noordwijk. The Netherlandswas working on telemetry and telecommand systems. Since 1978 he has been Head of the Transmision Techniques Section in the Directorate of Telecom munications. He was involved in the transmission design of the OTS ECS Olympus and European Data Relay systems. He has worked on a wide range of analogue and digital transmission topics wit

来源：评论

学校读者我要写书评

暂无评论

Built-in self-diagnostic by space-time compression of test responses

Built-in self-diagnostic by space-time compression of test r...

引用

1992 IEEE VLSI Test Symposium, VLSI 1992

作者： Karpovsky, M.G. Chaudhry, S.M. Research Laboratory of Design and Testing of Computer Hardware Department of Electrical Computer and Systems Engineering Boston University BostonMA02215 United States

ISBN: (纸本)0780306236

Presents two different methodologies for built-in self-diagnostic of boards and systems by space-time compression of test responses. The first method, soft decision, uses nonbinary multiple error-correcting codes to obtain space-time signatures. These obtained signatures and the corresponding precomputed references are compared and magnitudes of distortions in signatures are analyzed to identify faulty components. The second method, hard decision, makes use of the information indicating whether the corresponding signatures are distorted or not. Both approaches show considerable savings in hardware overheads when compared with a straightforward approach where a separate signature is required for every component. A transition from the soft to hard decision approach results in an increase in the number of signatures required for diagnostic but at the same time it results in a decrease in the complexity of a fault locating algorithm. Results pertaining to VLSI implementations are presented where the hardware overhead is estimated in terms of two-input equivalent gates. © 1992 IEEE.

关键词： Data compression

来源：评论

学校读者我要写书评

暂无评论

Recovering LSHGCs and SHGCs from stereo

Recovering LSHGCs and SHGCs from stereo

引用

1992 IEEE computer Society Conference on computer Vision and Pattern Recognition, CVPR 1992

作者： Chung, R.C.-K. Nevatia, R. Institute for Robotics and Intelligent Systems Departments of Computer Science and Electrical Engineering University of Southern California Los AngelesCA90089-0273 United States

ISBN: (纸本)0818628553

The problem of computing volumetric shape from stereo is examined. It is argued that intermediate two-and-one-half-dimensional dense or wire-frame descriptions may not be always possible from stereo, especially when there are curved surfaces in the scene, and that 3D volumetric descriptions of objects may have to be derived directly from stereo correspondences. Methods are then presented for recovering volumetric shape with linear straight homogeneous generalized cones (LSHGCs) and straight homogeneous generalized cones (SHGCs) as the shape models, using some invariant properties in their monocular and stereo projections. Experimental results on images of objects with curved surfaces are given. © 1992 IEEE.

关键词： computer vision

来源：评论

学校读者我要写书评

暂无评论

Refinement of noisy correspondence using feedback from 3D motion

Refinement of noisy correspondence using feedback from 3D mo...

引用

1992 IEEE computer Society Conference on computer Vision and Pattern Recognition, CVPR 1992

作者： Kim, Y.C. Price, K. Institute for Robotics and Intelligent Systems Departments of Computer Science and Electrical Engineering University of Southern California Los AngelesCA90089-0273 United States

ISBN: (纸本)0818628553

In automated feature-based motion analysis of multiple frames, correspondence data are usually noisy and fragmented. A technique that gradually refines the initial noisy correspondence data and links fragments of a single trajectory using feedback from 3D motion estimation is presented. First, 3D motion parameters are estimated using the initial correspondence data. Then, each noisy trajectory is partitioned into subsets of points, each of which conforms to the estimated motion. The best set is used as the input to the next motion estimation. This process is repeated, and the gaps in the refined correspondence data are filled by guidance from the predicted motion. Test results for a standard real image sequence are presented. © 1992 IEEE.

关键词： Motion estimation

来源：评论

学校读者我要写书评

暂无评论

Synthesis of high-speed A/D converter architectures with flexible functional simulation capabilities

Synthesis of high-speed A/D converter architectures with fle...

引用

1992 IEEE International Symposium on Circuits and systems, ISCAS 1992

作者： Vital, João C. Franca, José E. Integrated Circuits and Systems Design Group Electrical and Computer Engineering Department Instituto Superior Técnico AV4. Rovisco Pais Lisboa Codex1096 Portugal

ISBN: (纸本)0780305930

A CAD tool for high-level synthesis of high-speed AID converter architectures is described, which includes a flexible functional simulation capability taking into account the most relevant electrical parameters. By using the flash quantizer and the charge-redistribution MDAC blocks as the only mixedsignal functional primitives, this tool is capable of synthesizing multiple architectures, including the flash, subranging, two-step flash and pipelined AID converters. © 1992 IEEE.

关键词： High level synthesis

来源：评论

学校读者我要写书评

暂无评论

A method for learning from hints 92

A method for learning from hints

引用

Proceedings of the 5th International Conference on Neural Information Processing systems

作者： Yaser S. Abu-Mostafa Departments of Electrical Engineering Computer Science and Computation and Neural Systems California Institute of Technology Pasadena CA

ISBN: (纸本)9781558602748

We address the problem of learning an unknown function by putting together several pieces of information (hints) that we know about the function. We introduce a method that generalizes learning from examples to learning from hints. A canonical representation of hints is defined and illustrated for new types of hints. All the hints are represented to the learning process by examples, and examples of the function are treated on equal footing with the rest of the hints. During learning, examples from different hints are selected for processing according to a given schedule. We present two types of schedules; fixed schedules that specify the relative emphasis of each hint, and adaptive schedules that are based on how well each hint has been learned so far. Our learning method is compatible with any descent technique that we may choose to use.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Orthogonal built-in self-test

Orthogonal built-in self-test

引用

IEEE Compcon

作者： L. Avra Center for Reliable Computing Computer Systems Laboratory Departments of Electrical Engineering and Computer Science University of Stanford Stanford CA USA

The author introduces a new way to organize memory elements into scan chains for built-in self-testable data path logic. The goal of the procedure is to minimize the hardware overhead and performance impact associated with pseudo-random built-in self-test (PR-BIST) techniques by organizing the memory elements such that some of the logic required for BIST and scan operations is also used during normal operation. The author identifies function types that are well suited for implementation with the register designs required for BIST and shows that these function types are found in data path designs. Functional use is made of the BIST logic by organizing the memory elements in the design into orthogonal scan chains. A data path design example is used to compare an implementation using a normal BIST configuration to one using the orthogonal configuration.< >

关键词： Built-in self-test Hardware Costs Logic testing Organizing Logic design Automatic testing Shift registers Laboratories Life testing

来源：评论

学校读者我要写书评

暂无评论

Synthesis of high-speed A/D converter architectures with flexible functional simulation capabilities

Synthesis of high-speed A/D converter architectures with fle...

引用

IEEE International Symposium on Circuits and systems (ISCAS)

作者： J.C. Vital J.E. Franca Electrical and Computer Engineering Department Integrated Circuits and Systems Design Group Instituto Superior Técnico Lisboa Portugal Electrical and Computer Engineering Department Integrated Circuits and Systems Design Group Instituto Superior Técnico Lisboa Portugal

A CAD tool for high-level synthesis of high-speed analog-to-digital (A/D) converter architectures is described, which includes a flexible functional simulation capability taking into account the most relevant electrical parameters. By using the flash quantizer and the charge-redistribution multiplying digital-to-analog converter (MDAC) blocks as the only mixed-signal functional primitives, this tool is capable of synthesizing multiple architectures, including the flash, subranging, two-step flash and pipelined AID converters. The tool analyzes and determines the required high level building block specifications, based on functional models which accurately describe the dominant poles of the electrical behavior of the lowest-level building-blocks, namely arrays of switches, arrays of capacitors, resistor strings, operational amplifiers and comparators. A functional simulation based on such models is included.< >

关键词： Voltage Capacitors Computational modeling Circuit simulation Signal synthesis Switches Resistors Integrated circuit synthesis design engineering design automation

来源：评论

学校读者我要写书评

暂无评论

Recovering LSHGCs and SHGCs from stereo

Recovering LSHGCs and SHGCs from stereo

引用

Conference on computer Vision and Pattern Recognition (CVPR)

作者： R.C.-K. Chung R. Nevatia Institute for Robotics and Intelligent Systems Departments of Computer Science and Electrical Engineering University of Southern California Los Angeles CA USA Institute for Robotics and Intelligent Systems Departments of Computer Science and Electrical Engineering University of Southern California Los Angeles CA USA

关键词： Layout Intelligent robots Image recognition Image segmentation Indexing Shape measurement Intelligent systems computer science Surface texture Interpolation

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：