检索结果-内蒙古大学图书馆

POTENTIAL NAVAL SHIPBOARD APPLICATION OF NONAZEOTROPIC ENERGY-CONVERSION

NAVAL ENGINEERS JOURNAL 1987年第6期99卷 39-51页

作者： WU, C HWANG, BCC Dr. Chih Wu received his Ph.D. in mechanical engineering from the University of Illinois in January 1966. Presently he is a full professor in the Department of Mechanical Engineering at the U.S. Naval Academy. Since 1966 he has had more than 250 articles and papers presented at professional meetings and published in various journals and technical magazines concerning the subjects of energy thermodynamics heat transfer fluid dynamics computer science and education. Dr. Baochuan Hwang is a research specialist with the David Taylor Naval Ship R&D Center in Annapolis Maryland. He is responsible for the research activities in the Power Systems Division of the Propulsion and Auxiliary Systems Department at the Annapolis Laboratory. Prior to his employment with the Navy Dr. Hwang worked in industry at the General Electric Corporate R&D Center and at Aerochem Research laboratory. Dr. Hwang has worked extensively in the areas of machinery thermal systems rocket propulsion and heat transfer. His current interest is in the area of unsteady 3-D internal flows especially related to acoustic flow relationships in small rotating machinery.

The thermodynamic performance of an energy conversion device may be improved potentially by using a nonazeotropic mixture in a vapor cycle. A nonazeotropic mixture has a temperature distribution parallel to that of the surrounding fluid with which heat transfer takes place during the evaporation and condensation processes. Interest has increased in recent years in the use of nonazeotropic refrigerant mixtures to improve the performance of energy conversion devices. This report surveys developments in nonazeotropic energy conversion, describes the theory of a nonazeotropic energy conversion cycle, predicts energy savings possible from use of nonazeotropic energy conversion devices, and discusses potential naval shipboard application of such an energy conversion cycle.

关键词： Refrigerants

来源：评论

学校读者我要写书评

暂无评论

SOAR: Smalltalk without bytecodes 86

SOAR: Smalltalk without bytecodes

引用

Conference on Object-Oriented Programming systems, Languages and Applications, OOPSLA 1986

作者： Samples, A. Dain Ungar, David Hilfinger, Paul Department of Electrical Engineering and Computer Sciences Computer Science Division University of California BerkeleyCA94720 United States Computer Systems Laboratory Electrical Engineering Department Stanford University StanfordCA94305 United States

ISBN: (纸本)0897912047

We have implemented Smalltalk-80 on an instructionlevel simulator for a RISC microcomputer called SOAR. Measurements suggest that even a conventional computer can provide high performance for Smalltalk-80 by abandoning the 'Smalltalk Virtual Machine' in favor of compiling Smalltalk directly to SOAR machine code, linearising the activation records on the machine stack, eliminating the object table, and replacing reference counting with a new technique called Generation Scavenging. In order to implement these techniques, we had to find new ways of hashing objects, accessing often-used objects, invoking blocks, referencing activation records, managing activation record stacks, and converting the virtual machine images. © 1986 ACM.

关键词： Chemical activation

来源：评论

学校读者我要写书评

暂无评论

Wysiwis revised: Early experiences with multi-user interfaces 86

Wysiwis revised: Early experiences with multi-user interface...

引用

1986 ACM Conference on computer-Supported Cooperative Work, CSCW 1986

作者： Stefik, M. Bobrow, D.G. Lanning, S. Tatar, D. Foster, G. Intelligent Systems Laboratory Xerox Palo Alto Research Center Palo AltoCA94304 United States Computer Science Division University of California Berkeley BerkeleyCA94720 United States

ISBN: (纸本)9781450373654

WYSIWIS (What You See Is What I See) is a foundational abstraction for multi-user interfaces that expresses many of the characteristics of a chalkboard in face-to-face meetings. In its strictest interpretation, it means that everyone can see the same written information and also where anyone else is pointing. We present several examples of multi-user interfaces that start from the WYSIWIS abstraction. In our attempts to build software support for collaboration in meetings, we have discovered that WYSIWIS is at once crucial and too inflexible in its strictest sense. WYSIWIS must be relaxed for all our software tools to better accommodate important interactions in meetings. Relaxations to WYSIWIS are characterized in terms of constraints on its four key dimensions: display space, time of display, subgroup population, and congruence of view. © 1986 Association for computing Machinery. All rights reserved.

关键词： Abstracting

来源：评论

学校读者我要写书评

暂无评论

Cognoter, theory and practice of a colab-orative tool 86

Cognoter, theory and practice of a colab-orative tool

引用

1986 ACM Conference on computer-Supported Cooperative Work, CSCW 1986

作者： Foster, Gregg Stefik, Mark Computer Science Division University of California BerkeleyCA94720 United States Intelligent Systems Laboratory Xerox Palo Alto Research Center 3333 Coyote Hill Road Palo AltoCA94304 United States

ISBN: (纸本)9781450373654

Cognoter is a program helps a cooperating group of people to organizing their thoughts for a presentation, e.g., a paper or talk. It is designed for use in the Colab, an experimental laboratory created at Xerox PARC to study computer support of cooperative real-time group problem-solving. Cognoter provides a multi-user interface and a structured meeting process. An annotated graph of ideas is built up by the group in three stages: brainstorming for idea generation, ordering for idea organization, and evaluation for choosing what will be finally be presented. Interesting aspects of Cognoter include direct spatial manipulation of ideas and their order relationships, support of parallel activity, and incremental progress toward a total ordering of ideas. © 1986 Association for computing Machinery. All rights reserved.

关键词： User interfaces

来源：评论

学校读者我要写书评

暂无评论

Recognizing partially visible objects using feature indexed hypotheses

Recognizing partially visible objects using feature indexed ...

引用

IEEE International Conference on Robotics and Automation (ICRA)

作者： T. Knoll R. Jain Robot Systems Division and Computer Vision Research Laboratory Electrical Engineering and Computer Science Department The University of Michigan Michigan

A common task in computer vision is to recognize the objects in an image. Most computer vision systems do this by matching models for each possible object type in turn, recognizing objects by the best matches. This is not ideal, as it does not take advantage of the similarities and differences between the possible object types. The computation time also increases linearly with the number of possible objects, which can become a problem if the number is large. This paper describes a new recognition method, the feature indexed hypotheses method, which takes advantage of the similarities and differences between object types, and is able to handle cases, where there are a large number of possible object types, in sub-linear computation time. A two-dimensional occluded parts recognition system using this method is described.

关键词： Uncertainty computer vision Image recognition Robot vision systems Laboratories Machine vision Pattern recognition Layout

来源：评论

学校读者我要写书评

暂无评论

A load index for dynamic load balancing 86

A load index for dynamic load balancing

引用

Proceedings of 1986 ACM Fall joint computer conference

作者： Demenico Ferrari Songnian Zhou Computer Systems Research Group Computer Science Division Department of Electrical Engineering and Computer Sciences and the Electronics Research Laboratory University of California Berkeley

来源：评论

学校读者我要写书评

暂无评论

Concurrent algorithms for autonomous robot navigation in an unexplored terrain

Concurrent algorithms for autonomous robot navigation in an ...

引用

IEEE International Conference on Robotics and Automation (ICRA)

作者： S. Rao S. Iyengar C. Jorgensen C. Weisbin Department of Computer Science Louisiana State University Baton Rouge LA USA Engineering Physics and Mathematics division Center for Engineering Systems Advanced Research Oak Ridge National Laboratory Oak Ridge TN USA

Navigation planning is one of the most vital aspects of an autonomous mobile robot. The problem of navigation in a completely known obstacle terrain is solved in many cases. Comparatively less number of research results are reported in literature about robot navigation in a completely unknown obstacle terrain. In recent times, this problem is solved by imparting the learning capability to the robot. The robot explores the obstacles terrain using sensors and incrementally builds the terrain model. As the robot keeps navigating, the terrain model becomes more learned and the usage of sensors is reduced. The navigation paths are computed by making use of the existing terrain model. The navigation paths gradually approach global optimality as the learning proceeds. In this paper, we present concurrent algorithms for an autonomous robot navigation in an unexplored terrain. These concurrent algorithms are proven to be free from deadlocks and starvation. The performance of the concurrent algorithms is analyzed in terms of the planning time, travel time, scanning time, and update time. The analysis reveals the need for an efficient data structure for the obstacle terrain in order to reduce the navigation time of the robot, and also to incorporate learning. The modified adjacency list is proposed as a data structure for the spatial graph that represents the obstacle terrain. The time complexities of various algorithms that access, maintain, and update the spatial graph are estimated, and the effectiveness of the the implementation is illustrated.

关键词： Navigation Robot sensing systems Robot kinematics Mobile robots Data structures Robotics and automation Concurrent computing systems engineering and theory Orbital robotics Chromium

来源：评论

学校读者我要写书评

暂无评论

A computer INTEGRATED ENGINEERING SYSTEM FOR DESIGN AND LIFE-CYCLE MANAGEMENT

引用

NAVAL ENGINEERS JOURNAL 1986年第3期98卷 115-121页

作者： NICKODEMUS, GH YANUS, ID Irwin D. Yanusgraduated from the University of Pennsylvania with a bachelor's degree in arts and science in 1960 and a bachelor of science degree in mechanical engineering in 1961. In 1963 he received a master of science degree in mechanical engineering from Carnegie-Mellon University. Mr. Yanus is presently the manager of naval systems engineering in the Computer Aided Engineering Department of the Plant Engineering Division of Westinghouse Electric Corporation. His prior experience includes 19 years at the Bettis Atomic Power Laboratory where he performed assignments of increasing responsibility in design analysis development and procurement of nuclear reactor components for naval applications. As the manager of reactor mechanical design he was responsible for the mechanical design of theNimitzclass reactor components and control drive mechanism technology development. Mr. Yanus is a member of the American Society of Mechanical Engineers and the Society of Naval Architects and Marine Engineers. Glen H. Nickodemusgraduated from Michigan State University in 1964 with a bachelor of science degree in civil engineering. He joined the Pittsburgh-Des Moines Corporation in July of the same year. A master of science degree in civil engineering was obtained from Carnegie-Mellon University in 1973. In 1969 Mr. Nickodemus joined the Advanced Reactors Division of the Westinghouse Electric Corporation where he performed design and structural analysis functions for the development of the Fast Flux Test Facility and Clinch River Breeder Reactor Plant (CRBRP). As manager of CRBRP reactor engineering stress analysis he was responsible for the reactor vessel internals closure head control rod drivelines and miscellaneous guard vessels and head access area components. He is currently the manager of software development for the Computer Aided Engineering Department of the Plant Engineering Division. Mr. Nickodemus is a member of the American Society of Mechanical Engineers and is a registered professional engineer in Penn

This paper describes a computer integrated engineering system for design and life cycle management of weapons systems, ships and other multidisciplined systems. All engineering data are stored in a central engineering database. Individual application databases define and process information necessary for specific discipline evaluations. Interface modules between the application databases and the engineering database ensure that the entered data are complete, consistent, compatible, and in compliance with requirements. Conflicts are immediately identified and efficiently resolved. Implementation of the system improves design quality and reduces costs by minimizing the number of design iterations, reducing the effort to implement changes, providing effective storage and retrieval, and reducing the need for ship checks prior to modifications and alterations.

关键词： MILITARY ENGINEERING

来源：评论

学校读者我要写书评

暂无评论

SPEAKER-DEPENDENT ISOLATED WORD RECOGNITION USING SPEAKER-INDEPENDENT VECTOR QUANTIZATION CODEBOOKS AUGMENTED WITH SPEAKER-SPECIFIC DATA

引用

IEEE TRANSACTIONS ON ACOUSTICS SPEECH AND SIGNAL PROCESSING 1985年第2期33卷 440-443页

作者： BURTON, DK SHORE, JE Computer Science and Systems Branch Information Technology Division Naval Research Laboratory Inc. Washington D.C. DC USA

A hybrid approach to speaker-dependent isolated word recognition is discussed. The approach merges speaker-specific information obtained from a single training utterance with multisection vector quantization codebooks that were designed for speaker-independent recognition. The approach provides easily trained, computationally efficient, and accurate isolated word recognition. On the digits, the approach achieved an error rate less than 1 percent.

关键词： Vector quantization Error analysis Vocabulary Speech coding Training data computer science Information technology Government Protection Acoustics

来源：评论

学校读者我要写书评

暂无评论

Text-dependent speaker recognition using vector quantization

Text-dependent speaker recognition using vector quantization

引用

International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： J. Buck D. Burton J. Shore Information Technology Division Naval Research Laboratory Computer Science and Systems Washington D.C. DC USA

An application of source coding to speaker recognition is described. The method is text-dependent - the text spoken is known, and the problem is to determine who said it. Each speaker is represented by a sequence of vector quantization codebooks; known input utterances are classified using these codebook sequences and the resulting classification distortion is compared to a rejection threshold. On a 16 speaker test population with an additional 111 imposters, this method achieved a false rejection rate of 0.8%, an imposter acceptance rate of 1.8%, and within the 16 speakers, an identification error rate of 0.0%.

关键词： Speaker recognition Vector quantization Speech coding Speech analysis Distortion measurement Algorithm design and analysis Performance analysis Clustering algorithms Gain measurement Vocabulary

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：