检索结果-内蒙古大学图书馆

IEEE Workshop on Future Trends of Distributed Computing systems

作者： R.M. Yanney J.P. Hayes Space & Defence Sector TRW Systems Integration Group Redondo Beach CA USA Electrical Engineering and Computer Science Department University of Michigan Ann Arbor MI USA

The authors propose a transformation function, based on graph theory, that could be used to simplify the design and analysis of large fault-tolerant distributed systems. Redundant fault-tolerant distributed systems are represented by a facility graph. A graph transformation function based on the characteristics of line graphs is introduced. The line graph transformation is applied to the analysis and design of fault-tolerant distributed systems and their recovery. This results in redundant networks with favorable properties such as limited node degrees.< >

关键词： Fault tolerant systems Graph theory Fault diagnosis Digital systems Very large scale integration Real time systems Redundancy USA Councils Fault tolerance Labeling

来源：评论

学校读者我要写书评

暂无评论

A Methodology for Evaluating Decision Making Architectures for Automated Manufacturing systems

引用

IFAC Proceedings Volumes 1990年第8期23卷 321-326页

作者： R.Y. Al-Jaar A.A. Desrochers System Modeling Group Digital Equipment Corporation 4 Results Way MRO4-1/H17 Marlboro MA 01752-9122 USA Electrical Computer and Systems Engineering Department Rensselaer Polytechnic Institute Troy NY 12180-3590 USA

Controlling complex computer integrated manufacturing systems requires the design of an equally complex system of computers whose topology forms a real-time Decision Making Architecture (DMA) consisting of control, communication, and database functions, The purpose of the DMA is to ensure that production operations proceed on schedule, and to detect and correct any errors in real-time, The choice of a DMA greatly influences the performance of the overall manufacturing system. A generic methodology for evaluating DMAs is proposed. Each computer is modeled as a Decision Making Unit (DMU) using Generalized Stochastic Petri Nets (GSPNs). Each DMU represents the functions of a typical computer in a manufacturing environment. DMU modules serve as basic building blocks that can be easily interconnected to model any desired DMA. The measure of performance is the response time, and a procedure for computing it is described. Two- and three-level hierarchical DMAs are evaluated by automatically solving the equivalent Markov Chain of the GSPN model.

关键词： Performance evaluation Generalized Stochastic Petri Nets Markov models automated manufacturing systems decision making architectures hierarchical control architectures

来源：评论

学校读者我要写书评

暂无评论

MCFS: a multiple criteria reasoning fuzzy expert systems building tool

MCFS: a multiple criteria reasoning fuzzy expert systems bui...

引用

IEEE Annual International computer Software and Applications Conference (COMPSAC)

作者： A. Kamel A. Nazif O. El-Dessouki N. Kamel AI/KBS Group Computer Science Department Michigan State University East Lansing MI USA Electronics and Communications Department College of Engineering Cairo University Guiza Egypt Database Systems Research & Development Center Computer and Information Sciences Department University of Florida Gainesville FL USA

The authors present the design principles of MCFS, an expert system building tool based on the idea of combining multiple criteria reasoning with the concepts of fuzzy logic. An important feature of MCFS is its ability to handle multiple criteria reasoning by structuring the deduction process into a hierarchy of logical levels. Within each level, the rules are organized into sets of rules and rule set groups. The concepts of fuzzy logic are introduced by allowing uncertainty within each rule, each set of rules, and each rule set group. MCFS has been fully implemented and applied to several domains of knowledge such as computer system selection and procurement, solution of nonlinear simultaneous equations, neck-tie selection, and longevity estimation. Experiments with these applications indicate that, compared to standard expert system tools, MCFS produces expert systems which are easier to build and better match the human expert.< >

关键词： Hybrid intelligent systems Expert systems Fuzzy logic Uncertainty Humans Educational institutions Artificial intelligence Knowledge based systems computer science Buildings

来源：评论

学校读者我要写书评

暂无评论

APPLICATION OF LAN STANDARDS TO THE NAVY COMBAT systems

引用

NAVAL ENGINEERS JOURNAL 1990年第3期102卷 146-153页

作者： GREEN, DT MARLOW, DT Daniel T. Green:is a senior computer scientist on the staff of the Engineering and Technology Division of the Combat Systems Department of the Naval Surface Warfare Center. He has held a variety of technical and management positions in the computer and related fields since being employed at NSWC in 1958. He has been a member of the SAFENET Working Group since its inception and is currently chairman of one of its subgroups. David T. Marlow:is a senior electronics engineer in the Combat Systems Technology Branch of the Engineering and Technology Division of the Combat Systems Department of the Naval Surface Warfare Center. He has held a variety of technical positions involved with research and development in the computer and LAN fields since being employed at NSWC in 1972. He has been a member of the SAFENET Working Group since its beginning and is currently chairman of one of its subgroups. He is actively involved in the development of some of the technology being introduced in SAFENET.

SAFENET (Survivable Adaptable Fiber Optic Embedded Network) specifies a subset of the large and evolving set of commercial LAN standards. The SAFENET subset is chosen for use in Navy combat systems and augments this subset with additional specifications only when commercial standards fall short of meeting Navy needs. SAFENET is also a program designed to influence the development of commercial standards so that they will better meet Navy needs without augmentation. The SAFENET program involves the full Navy development community, both government and industrial, in selecting and developing the SAFENET set of standards and specifications. The SAFENET program is the earliest component of the U.S. Navy's Next Generation computer Resources Program which is selecting and developing standards for computing resources in future Navy systems. This paper discusses: the Navy combat system environment in which products compliant with SAFENET standards are intended to work, the development process, the framework in which commercial standards are organized, the capabilities included in SAFENET, and the current status of SAFENET compliant products.

关键词： computer Networks

来源：评论

学校读者我要写书评

暂无评论

AEGIS AAW CORRELATOR TRACKER (AACT) EXPERIMENT

引用

NAVAL ENGINEERS JOURNAL 1990年第3期102卷 37-42页

作者： GRANT, CJ The Author:is an assistant group supervisor of the Anti-Air Warfare Systems Engineering Group in the Fleet Systems Department of The Johns Hopkins University Applied Physics Laboratory (JHU/APL). He received a B.S. in physics from the University of Maryland in 1978 an M.S. in applied physics and an M.S. in computer science from The Johns Hopkins University in 1982 and 1984 respectively. Since joining JHU/APL in 1978 Mr. Grant has been involved in the development and integration of advanced command support systems and communications in U.S. Navy shipboard combat systems with particular emphasis on the Aegis Combat System. He is currently the lead engineer of the Command Support At Sea Experiment in which an Aegis AAW Correlator/Tracker capability is being developed for shipboard evaluation.

The Johns Hopkins University Applied Physics Laboratory, in continuing development of the Aegis Command and Control capabilities aboard USS Ticonderoga class cruisers and USS Arleigh Burke class destroyers, under the direction of the Aegis Shipbuilding Project (PMS-400), is in the process of developing the Aegis AAW Correlator/Tracker (AACT) to experiment with and evaluate the capability to correlate track and contact data from over-the-horizon (OTH) sources and sensors with the shipboard real-time tactical picture. AACT, which is based on multi-hypothesis correlation algorithms, is intended to be fully automated; requiring little or no operator interaction in spite of ambiguous or conflicting data. Unlike other OTH correlator/tracker designs, the experimental AACT capability is highly integrated with the combat system. It makes maximum use of the shipboard sensor data, such as that provided by the AN/SPY-1 radar, to provide the basis from which to correlate the OTH data in areas of mutual sensor coverage. This approach helps to resolve the traditional conflicts between the tactical picture derived from battle group sensors and that derived from OTH sensors, and provides command the track data in the formats, rates, and timeliness needed to fight the AAW battle. This paper describes the AACT concept, design, and implementation. It addresses the plans for installation of AACT aboard an Aegis cruiser for evaluation of this capability in an operational environment.

关键词： computer Graphics

来源：评论

学校读者我要写书评

暂无评论

computer-SYSTEM ARCHITECTURE CONCEPTS FOR FUTURE COMBAT systems

引用

NAVAL ENGINEERS JOURNAL 1990年第3期102卷 43-62页

作者： ZITZMAN, LH FALATKO, SM PAPACH, JL Dr. Lewis H. Zitzman:is the group supervisor of the Advanced Systems Design Group Fleet Systems Department The Johns Hopkins University Applied Physics Laboratory (JHU/APL). He has been employed at JHU/APL since 1972 performing applied research in computer science and in investigating and applying advanced computer technologies to Navy shipboard systems. He is currently chairman of Aegis Computer Architecture Data Bus and Fiber Optics Working Group from which many concepts for this paper were generated. Dr. Zitzman received his B.S. degree in physics from Brigham Young University in 1963 and his M.S. and Ph.D. degrees in physics from the University of Illinois in 1967 and 1972 respectively. Stephen M. Falatko:was a senior engineering analyst in the Combat Systems Engineering Department Comptek Research Incorporated for the majority of this effort. He is currently employed at ManTech Services Corporation. During his eight-year career first at The Johns Hopkins University Applied Physics Laboratory and currently with ManTech Mr. Falatko's work has centered around the development of requirements and specifications for future Navy systems and the application of advanced technology to Navy command and control systems. He is a member of both the Computer Architecture Fiber Optics and Data Bus Working Group and the Aegis Fiber Optics Working Group. Mr. Falatko received his B.S. degree in aerospace engineering with high distinction from the University of Virginia in 1982 and his M.S. degree in applied physics from The Johns Hopkins University in 1985. Mr. Falatko is a member of Tau Beta Pi Sigma Gamma Tau the American Society of Naval Engineers and the U.S. Naval Institute. Janet L. Papach:is a section leader and senior engineering analyst in the Combat Systems Engineering Department Comptek Research Incorporated. She has ten years' experience as an analyst supporting NavSea Spa War and the U.S. Department of State. She currently participates in working group efforts under Aegis Combat System Doctrin

This paper sets forth computer systems architecture concepts for the combat system of the 2010–2030 timeframe that satisfy the needs of the next generation of surface combatants. It builds upon the current Aegis computer systems architecture, expanding that architecture while preserving, and adhering to, the Aegis fundamental principle of thorough systems engineering, dedicated to maintaining a well integrated, highly reliable, and easily operable combat system. The implementation of these proposed computer systems concepts in a coherent architecture would support the future battle force capable combat system and allow the expansion necessary to accommodate evolutionary changes in both the threat environment and the technology then available to effectively counter that threat. Changes to the current Aegis computer architecture must be carefully and effectively managed such that the fleet will retain its combat readiness capability at all times. This paper describes a possible transition approach for evolving the current Aegis computer architecture to a general architecture for the future. The proposed computer systems architecture concepts encompass the use of combinations of physically distributed, microprocessor-based computers, collocated with the equipment they support or embedded within the equipment itself. They draw heavily on widely used and available industry standards, including instruction set architectures (ISAs), backplane busses, microprocessors, computer programming languages and development environments, and local area networks (LANs). In this proposal, LANs, based on fiber optics, will provide the interconnection to support system expandability, redundancy, and higher data throughput rates. A system of cross connected LANs will support a high level of combat system integration, spanning the major warfare areas, and will facilitate the coordination and development of a coherent multi-warfare tactical picture supporting the future combatant command st

关键词： computer Architecture

来源：评论

学校读者我要写书评

暂无评论

THE COMMAND SUPPORT AT-SEA EXPERIMENT

引用

NAVAL ENGINEERS JOURNAL 1990年第3期102卷 25-36页

作者： BUSCHER, DJ SUNDAY, DM David J. Buscher:is an electrical engineer on the Principal Professional Staff of the Fleet Systems Department of The Johns Hopkins University Applied Physics Laboratory. He earned his BS degree in electrical engineering from Villanova University in 1967 an MSEE degree from the University of Maryland in 1972 and an MS degree in technical management from The Johns Hopkins University in 1985. He was the lead engineer on the Command Support At-Sea Experiment Project. He started his career in 1967 with the U.S. Army Harry Diamond Laboratory working on computer and communications projects. During this time he worked in Vietnam with the United States Army Vietnam Science Advisor Office. Since joining JHU/APL in 1978 he has worked on a variety of projects associated with computer graphics hospital patient information systems computer networks autonomous underwater vehicles and satellite communications. He is currently assistant group supervisor of the Computer Systems Group. Daniel M. Sunday:is a mathematician on the Principal Professional Staff of the Fleet Systems Department of The Johns Hopkins University Applied Physics Laboratory. He earned his Ph.D. in mathematics from the University of Minnesota in 1971 and did postdoctoral research on neural networks at the University of California at Berkeley. Since joining JHU/APL in 1980 Dr. Sunday has worked as a designer and developer of software systems with emphasis on medical imaging interactive graphics natural language interfaces and software standards. He was the network designer for the Headquarters Integrated Office System (HIOS) Network for the Army at the Pentagon. He is currently the lead software engineer on the Command Support At-Sea Experiment Project.

The Command Support At-Sea Experiment (CS@SE) provides experimental advanced graphics display systems consisting of large screen color displays and operator console color displays in the combat information center (CIC) of an Aegis cruiser and in the tactical flag command center (TFCC) of an aircraft carrier. CS@SE systems are designed to prototype potential command support capabilities in an at-sea environment to validate and refine requirements for planned production system upgrades. These systems use sophisticated color graphics techniques to provide real-time tactical displays that improve the availability of information to an operator by reducing clutter through the use of color, area fill, transparen overlays and intensity coding of track symbols. Interfaces wen developed with the Aegis Display System (ADS), Shipboarc Gridlock System with Auto-correlation (SGS/AC), Flag Dats Display System (FDDS) and Tomahawk Engagement Planning and Exercise Evaluation System (TEPEE) that provided the data for the presentation of a tactical display. Display elements included both real-time and over-the-horizon (OTH) surface track data, velocity leaders, tags, uncertainty ellipses, and history trails. The display also included filled land masses, country boundaries, commercial airways, cities, graphics overlays (i.e., operational areas), weapon system missile performance contours, and engagement plans. This paper describes the experiment, its installation and integration into the shipboard environments of an Aegis cruiser (USS Leyte Gulf ) and an aircraft carrier (USS America , its usage by the ships companies and embarked staffs, and the experiment result! and findings. Key conclusions of the experiment are: 1 Advanced graphics color displays can significantly enhance the ability of the warfighter to assimilate a complex tactical display. 2 Both ships reported a requirement for a correlated OTH and real-time track display with the ability to clearly differentiate the two types

关键词： computer Graphics

来源：评论

学校读者我要写书评

暂无评论

CAD CAM MANUFACTURING OF PROTOTYPE SHIPBOARD COMPONENTS

引用

NAVAL ENGINEERS JOURNAL 1990年第3期102卷 93-99页

作者： CALVERT, TE RODRIGUEZ, FA SLEBZAK, JS Thomas E. Calvert P.E.: is a senior project engineer with the Propulsion and Auxiliary Systems Department David Taylor Research Center Annapolis Md. His interests include application of computers to all aspects of engineering with particular emphasis on utilization of small computers. Mr. Calvert is a licensed professional engineer in Maryland. He received a BSEE from Drexel University in 1969 and since that time has completed a number of graduate courses related to machinery acoustics. Francisco A. Rodriguez:is an engineer with the Propulsion and Auxiliary Systems Department David Taylor Research Center. He was formerly with the Computer-Aided Design/Interactive Graphics Group of the Division of Engineering and Weapons U.S. Naval Academy. His interests include interfacing the computer aided design to the computer aided manufacturing along with related software and hardware development. Mr. Rodriguez received a BSEEfrom the University of Virginia in 1968. James S. Slebzak:is a mechanical engineering technician with the Propulsion and Auxiliary Systems Department David Taylor Research Center. He received his machinists papers in 1971 after serving his apprenticeship at David Taylor Research Center. He continued his education and became the senior numerical control programmer at the Annapolis Laboratory. He completed his mechanical technology degree from Anne Arundel Community College in 1986. His interests are in the application of numerically controlled manufacturing techniques to prototype machinery components.

The machine shop at the Annapolis Laboratory of the David Taylor Research Center (DTRC) provides model making and prototype support to a large variety of naval ship related engineering projects. In order to meet these challenging requirements, computer aided design/computer aided manufacturing (CAD/CAM) techniques are being used to produce “one of a kind” prototypes or very low volume production parts. The use of computer aides in these cases is to facilitate the accurate manufacture of a difficult part, rather than to improve manufacturing efficiencies. In addition, the approach provides the flexibility required to support research and development projects. Several examples of prototype shipboard components manufactured using CAD/CAM techniques are presented in this paper. The hardware and software that facilitated these projects are discussed. The examples described have met the requirements to produce a wide variety of prototype shipboard machinery components quickly and accurately.

关键词： Ship Equipment

来源：评论

学校读者我要写书评

暂无评论

SHIP SERVICE ELECTRICAL systems - DESIGNING FOR SURVIVABILITY

引用

NAVAL ENGINEERS JOURNAL 1990年第5期102卷 32-36页

作者： CERMINARA, J KOTACKA, RO John Cerminara:is a principal engineer with Westinghouse Machinery Technology Division Electrical Systems Department. He holds a B.S. degree in electrical engineering from the University of Pittsburgh. He is a registered professional engineer and a member of IEEE ASNE and the Ship Steering Group of the Combat Survivability Division of ADPA. Mr. Cerminara has had over 30 years of multidiscipline experience ranging from engineering and construction in heavy industry to standards and publications. Past assignments include DOE/ NASA wind turbine project manager for Westinghouse and task leader of MTD electrical systems. Most recent assignments have included hull mechanical and electrical (HM&E) distributive system survivability analyses of the LSD-41 mobility mission area and application and validation of NavSea computer-aided design of Survivable Distributive System (CADSDiS) Program. Rolf O. Kotacka:is presently a ship systems engineer in the Ship Systems Engineering Branch of the Naval Sea Systems Command Engineering Directorate where his primary responsibility is ship system survivability. He is a 1977 graduate of SUNY Maritime College where he received his bachelor of engineering degree in marine electrical engineering as well as a U.S. Coast Guard Third Assistant Engineer License and a commission in the U. S. Naval Reserve. Upon graduation Mr. Kotacka was employed by Charleston Naval Shipyard as a field engineer until 1981 where he gained his background in surface ship HM&E systems and equipment. He then transferred to the Supervisor of Shipbuilding Conversion and Repair Groton where he served as a senior electrical engineer monitoring the design and construction of Trident and 688 class submarines and received the Meritorious Unit Citation. Prior to his present position Mr. Kotacka was the life cycle manager for diesel generator sets in the Naval Sea Systems Command's Generators Branch. He has coauthored several papers dealing with power generation for ASE and SNAME. Mr. Kotacka is also a lieutena

This paper highlights the survivability concerns in the design of ship service power systems. The paper gives a brief description of what constitutes a typical ship service electric power system and concentrates on electric power generation and associated controls. Established survivability design principles and guidelines are highlighted and the application of those guidelines are discussed. General Specifications (Gen Specs) for Ships of the U.S. Navy are cited as the cornerstone for design. Specific design criteria are cited as well as the rationale associated with the survivability design guidelines pertaining to power generation and distribution. The application of these survivability design guidelines plus the use of the deactivation diagram/damage tolerance analysis cited in the Gen Spec section 072e will enhance overall design and help ensure survivable electric power systems for surface combatants.

关键词： Warships

来源：评论

学校读者我要写书评

暂无评论

COMPARING BARRIER ALGORITHMS

引用

PARALLEL COMPUTING 1989年第2期12卷 157-170页

作者： ARENSTORF, NS JORDAN, HF Computer Systems Design Group Department of Electrical and Computer Engineering University of Colorado Boulder CO 80309 U.S.A.

A barrier is a method for synchronizing a large number of concurrent computer processes. After consideration of some basic synchronization mechanisms, a collection of barrier algorithms with either linear or logarithmic depth will be presented. A graphical model is described that profiles the execution of the barriers and other parallel programming constructs. This model shows that in order to achieve the best performance, different situations call for different barrier implementations. Timing experiments supporting these conclusions are detailed.

关键词： Barrier graphical model MIMD computer shared memory speedup synchronization

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：