检索结果-内蒙古大学图书馆

CONCURRENT engineering AND ENTERPRISE MODELING

ASSEMBLY AUTOMATION 1994年第3期14卷 14-21页

作者： RANKY, PG Professor of Innovative Manufacturing and System Design Head of Department of Manufacturing Engineering and Design Faculty of Technology University of East London

Summarizes the most important principles of concurrent engineering[CE] and computer integrated manufacturing [CIM].Discusses system data flow and IDEFo diagrams used as graphical descriptionsof the engineering process. Introduces a software package called *** that CIM addresses the total information requirements andmanagement of a company from the development of a business plan through tothe shipment of a product and the follow‐up support.

关键词： Concurrent engineering Computer integrated manufacturing CIM

来源：评论

学校读者我要写书评

暂无评论

Multiagent fault‐diagnosis expert system in power systems

引用

European Transactions on Electrical Power 1995年第5期5卷 341-347页

作者： Wang, J.P. Trécat, J. Dr. Jianping Wang is a doctor fellow in the Faculte Polytechnique de Mons in Belgium. His current research field is parallel processing applications in power systems. Dr. Wang obtained his BS degree from Southwest Jiaotong University in P.R. Chinain 1982. From 1982 to 1990 he was appointed as an assistant lecturer. lecturer and associate professor respectively in the electrical engineering department of Southwest Jiaotong University. He obtained his Ph.D in the FacultC Polytechnique de Mons in July of 1993. (BD Dolez 3 1 FPMS B-7000 Mons Belgium T +32-65/37 41 87 Fax +32-65/37 43 00) Professor J. Trécat is a director in the power system laboratory in the Faculty Polytechnique de Mons. He obtained his Ph.D in the University of Manchester Institute of Science and Technology(UM1ST) in U.K. in 1970. He has been working in the fields of power system automation artificial intelligence application and computer vision in the Facult6 Polytechnique de Mons since 1970. He is a senior member of IEEE and he has made much contribution both in electrical engineering education and research. (BD Dolez 3 I FPMS B-7000 Mons T +32-651374185. Fax +32-6513743 00)

In order to solve the speed problem and shallow reasoning problem met in current research in fault diagnosis expert system, this paper presents a model based parallel fault diagnosis expert system for energy management systems (EMS). The Petri net model, which corresponds to the relationship between power system components and their protection systems, has been used for the inference in fault diagnosis. A multiagent parallel processing expert system, which is based on five transputers in Sun workstation, has been built for fault diagnosis purposes. The test results show that this expert system is not only fast but also has better performances. Copyright © 1995 John Wiley & Sons, Ltd.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Measurement of a Transparent Object by Using an Automated Talbot Interferometer

引用

Optical Review 1994年第2期1卷 273-275页

作者： Teshima, Nobuaki Asano, Akira Yokozeki, Shunsuke Kyushu Institute of Technology Department of Mechanical System Engineering Faculty of Computer Science and Systems Engineering Iizuka Fukuoka 820 680-4 Kawazu Japan Department of Electrical Engineering and Computer Science Osaka Prefectural College of Technology Neyagawa Osaka 572 26-12 Saiwai-cho Japan Department of Intelligent Mechanics Faculty of Biology-Oriented Science and Technology Kinki University Uchita-cho Naga-gun Wakayama 646-64 930 Nishimitani Japan

It is reported that the first partial derivative of the phase distribution for a transparent object can be measured automatically by a personal computer with an image processor. The moire pattern is formed by superimposing the Fourier image distorted by the transparent object on the master grating. But if only the moire patterns are observed, it is not shown if the fringe order numbers increase or decrease. The fringe scanning method is presented to overcome the fringe order numbers. The four-step method is used to calculate the first partial derivative. By a simple experiment, the first partial derivative can be shown in the three dimensional graphics. © 1994, Japan Society of Applied Physics. All rights reserved.

关键词： automated Talbot interferometer contour moire fringe four-step method fringe scanning moire fringe phase unwrapping Talbot effect

来源：评论

学校读者我要写书评

暂无评论

Interferometry for Measuring Large Aspherical Surfaces with Holographic Optical Elements

引用

Optical Review 1994年第2期1卷 281-283页

作者： Ueda, Hiroaki Shimizu, Eiji Laboratories of Image Information Science and Technology Toyonaka Osaka 565 1-4-2 Shin-Senri Higashi Japan Department of Electronics and Information Science Faculty of Engineering and Design Kyoto Institute of Technology Matsugasaki Sakyo-ku Kyoto 606 Japan

Interferometry for measuring the shape of large aspherical surfaces is reported. The interference fringe pattern between the parallel reference beam and the reconstructed wavefront from the master zone plate which is drawn by an electron-beam drawing machine is recorded on a hologram plate with off-axis optical arrangement. The hologram plate used as the standard element is reconstructed by the conjugate beam in a modified Twyman-Green interferometer. Insufficient parallelism of commercial hologram plates can be compensated by this method. It is also easy to make replicas. Some experimental results are also presented. © 1994, Japan Society of Applied Physics. All rights reserved.

关键词： aspherical lens diffraction grating HOE (holographic optical element) hologram interferometry toric lens

来源：评论

学校读者我要写书评

暂无评论

H/sub /spl infin// type problem for sampled-data control systems-a solution via minimum energy characterization

引用

IEEE Transactions on Automatic Control 1994年第11期39卷 2278-2284页

作者： Y. Hayakawa S. Hara Y. Yamamoto Department of Electronic-Mechanical Engineering Faculty of Engineering University of Nagoya Nagoya Japan Department of System Science Tokyo Institute of Technology Nagatsuda Japan Division of Applied Systems Science Faculty of Engineering Kyoto University Japan

This paper aims at deriving a solution for H/sub /spl infin// type problem for sampled-data control systems. The solution is given in terms of an equivalent discrete-time H/sub /spl infin// problem. The reduction proc... 详细信息

关键词： Control systems Sliding mode control Automatic speech recognition Automatic control Lyapunov method Variable structure systems Riccati equations Power engineering and energy Uncertain systems Stability

来源：评论

学校读者我要写书评

暂无评论

Comparison of Different Substrate Pre-Treatments on the Quality of GaN Film Growth on 6H-, 4H-, and 3C-SiC

引用

MRS Online Proceedings Library 1994年第1期622卷 6161-6166页

作者： Lee, K. H. Hong, M. H. Teker, K. Jacob, C. Pirouz, P. Department of Materials Science and Engineering Case Western Reserve University Cleveland USA Dept. of Electronics and Information Science Faculty of Engineering and Design Kyoto Institute of Technology Matsugasaki Sakyo-ku Kyoto Japan

Together with sapphire, SiC is the most common substrate material for GaN epitaxial growth. In fact, SiC has advantages over sapphire because of its better thermal conductivity and lower film substrate lattice mismatch (≈3.5%). However, nucleation of GaN on SiC is rather difficult because of the low surface energy of SiC and the sensitivity of substrate preparation. This latter point makes it essential to use a very careful cleaning step, and also to pre-treat the substrate surface by growing a thick buffer layer of AlN at a relatively high temperature. In this study, several pre-treatment steps of SiC for GaN deposition were tested including (a) nitration with NH3 for 0.5–20 minutes, (b) pre-adsorption of trimethyl gallium (TMG) or trimethyl aluminum (TMA) for 0.5–5 minutes, and (c) deposition of an AlN buffer layer at ≈1150°C. After each pre-treatment, GaN was deposited by MOCVD using dilute H2(Ar+12%H2), NH3 and TMG. All the films were characterized by XRD and cross-sectional TEM. After nitration of SiC, the deposited GaN film was found to be polycrystalline. In case of pre-adsorption of TMG, epitaxial but island-like GaN formed on the substrate. In the third case, with an ultra-thin (≈1.5nm) coverage of AlN on SiC (by pre-adsorption of TMA or by 50 seconds deposition of AlN), GaN epilayers were successfully deposited on SiC. However, when AlN was deposited for longer than 3 minutes (up to 10 minutes), only polycrystalline GaN was obtained. With this technique of covering the surface with an ultra-thin layer of AlN, epitaxial GaN has been successfully deposited on 6H-SiC (0001), on 4H-SiC(0001), and on 3C-SiC/Si(111) substrates. The effect of the different pre-treatments of SiC on the quality of the deposited GaN films will be discussed and compared, and the optimal conditions for GaN deposition for each substrate will be presented.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Towards a coordinated development of numerical CACSD software: the RASP/SLICOT compatibility concept

Towards a coordinated development of numerical CACSD softwar...

引用

IEEE International Symposium on Computer Aided Control system design (CACSD)

作者： G. Grubel A. Varga A. van den Boom A.J. Geurts Control Design Engineering Institute for Robotics and System Dynamics DLR-Oberpfaffenhofen Wessling Germany Department of Electrical Engineering Eindhovan University of Technology Eindhoven Netherlands Department of Mathematics & Computer Science Eindhovan University of Technology Eindhoven Netherlands

The concept of mutual compatibility is introduced. It has arisen from the cooperation of the developers of the RASP and SLICOT libraries. With this concept it becomes feasible to coordinate the development of several libraries leading to a reduction of software implementation and testing efforts without giving up the identity of the separate libraries. A first development along the lines of the mutual compatibility concept is the recently developed model reduction library RASP-MODRED.< >

关键词： Software libraries MATLAB Data structures Software testing Mathematics Size control Lighting control Control design design engineering Robot kinematics

来源：评论

学校读者我要写书评

暂无评论

Whistle-blowing in enforcement of environmental regulations

Whistle-blowing in enforcement of environmental regulations

引用

IEEE International Conference on systems, Man and Cybernetics

作者： K.W. Hipel D.M. Kilgour Xianpei Yin Department of Statistics and Actuarial Science University of Waterloo ONT Canada Department of Mathematics Wilfrid Laurier University ONT Canada Department of System Design Engineering University of Waterloo ONT Canada Department of Management Engineering Chengdu University of Information and Technology Chengdu Sichuan China

A mathematical model is used to assess the effectiveness of the reporting system commonly referred to as whistle-blowing used in the enforcement of environmental laws and regulations. To model realistically environmental enforcement problems such as compliance to water and air quality standards, the formal model is constructed using noncooperative game theory. To demonstrate the benefits to an environmental agency that uses a reporting system with essentially free reporting information, a model with a reporting system is rigorously compared to one without. By calculating and comparing Nash equilibria over a range of values of model parameters, the conditions under which whistle-blowing can be truly effective are identified. Overall, it is found that whistle-blowing can be helpful for reducing violations of environmental standards, thereby maintaining or improving environmental quality.< >

关键词： Power system modeling Mathematical model Game theory Marine animals Rivers Environmentally friendly manufacturing techniques Industrial pollution systems engineering and theory Statistics Mathematics

来源：评论

学校读者我要写书评

暂无评论

EFFECTS OF SAMPLE ISOLATION AND HANDLING ON THE RECOVERY OF PURGEABLE ORGANIC-COMPOUNDS

引用

GROUND WATER MONITORING AND REMEDIATION 1994年第2期14卷 142-152页

作者： GIBS, J IMBRIGIOTTA, TE FICKEN, JH PANKOW, JF ROSEN, ME Jacob Gibs is a water quality specialist with the USGS Water Resources Division (810 Bear Tavern Rd. Ste. 206 West Trenton NJ 08628). He received his B.S. in mechanical engineering in 1968 his M.S. in environmental engineering in 1975 and his Ph.D. in environmental engineering in 1983 all from Drexel University in Philadelphia. His research interests include evaluating representative ground water and surface water sampling techniques for trace levels of organic and inorganic compounds and designing new sampling devices. Thomas E. Imbrigiotta received a B.S. in chemistry with a concentration in environmental studies from Oakland University Rochester Michigan in 1975. He then attended the University of Wisconsin Madison and received an M.S. in water chemistry in 1982. He has been a hydrologist with the USGS Water Resources Division (810 Bear Tavern Rd. Ste. 206 West Trenton NJ 08628) since 1977. He worked in the Indiana District from 1977 to 1984 prior to coming to the New Jersey District. Currently he is project coordinator for the Picatinny Research project a study of the fate and transport of chlorinated solvents in ground water at Picatinny Arsenal New Jersey. Previously he was chief of a project evaluating sampling techniques for organics in ground water. James H. Ficken worked for the USGS Water Resources Division as a chemical engineer from 1964 to 1992. He received his B.S. in chemical engineering in 1962 from Washington University in St. Louis Missouri. His research interests were water quality instrumentation and sensors that measure real-time environmental data. He contributed as a team member to the design and development of the USGS water quality flow-through and mini-monitor system. Ficken passed away in 1992. James F. Pankow is a professor in the Department of Environmental Science and Engineering at the Oregon Graduate Institute (Oregon Graduate Institute of Science and Technology Department of Environmental Science and Engineering P.O. Box 1900 Portland OR 97291–1000). He

This report compares the recovery of purgeable organic compounds (POCs) obtained by using a downhole isobaric sampler developed by the U.S. Geological Survey, a helical-rotor submersible pump, and a point source bailer to collect and isolate samples of ground water from three wells in New York and New Jersey, the samples contained a total of 13 POCs detectable at concentrations ranging from 0.5 mug/L to about 400 mug/L. This report also compares the effects of sample handling, specifically the differences in POC concentration recovery when an isobaric sample container is filled at land surface vs. when it is filled downhole, and when samples are taken using a bailer with and without a bottom-emptying device. These case studies are used to quantify the possible effects of different sample-isolation and sample-handling techniques on POC recovery. The relative effectiveness of the three devices varied by site and by compound. Overall, the POC recoveries achieved by using the helical-rotor submersible pump and the downhole isobaric sampler were not significantly different at the 95 percent confidence level. POC recovery obtained by using the point source bailer was 11 percent lower overall. The downhole isobaric sampler results exhibited smaller coefficients of variation than did the helical-rotor submersible pump or the point-source bailer results. However, the differences between the coefficients of variation of the downhole isobaric sampler and those of the helical-rotor submersible pump were not significant the 95 percent confidence level. The nonsignificant smaller coefficient of variation of the downhole isobaric sampler apparently resulted from two fewer sample handling steps that exposed the sample water to ambient air. An independent experiment performed with a different downhole sampler at one of the wells used in this investigation produced a similar statistical result. Also, the POC recovery obtained by pouring sample water out the top Of a point source bail

关键词：

来源：评论

学校读者我要写书评

暂无评论

ACQUISITION REFORM AND BEST PRODUCT PROCUREMENT - AN engineering VIEW

引用

NAVAL ENGINEERS JOURNAL 1994年第6期106卷 41-57页

作者： FISHER, DA SKOLNICK, A He has been involved with several weapon system developments. Among these were the Trident II fire control and navigation systems the BSY-I Anti-Submarine Warfare System and the Navy standard computers (UYK44 and EMSP). He served as manager of the Digital Circuits Engineering Branch and was then appointed as manager of the Automatic Test Equipment (ATE) Technology Division. As manager of the ATE Technology Division he was responsible for the SP-23 Fire Control System Support Project the SP-24 Navigation Project and the Fleet Progressive Maintenance Program (2M/ATE). This Division was responsible for selection and application of electronic product technology and for developing fleet test and repair techniques. He holds a B.S. in Electrical Engineering from the University of Evansville and is currently pursuing a Masters of Public Administration at Indiana University-Purdue University Indianapolis. Dr. Alfred Skolnick:retired from the Navy in 1983 with the rank of captain. He is president of System Science Consultants (SSC) specializing in strategic planning technical program definition technology assessment and engineering analyses on selected matters of national interest. Dr. Skolnick taught mathematics and management sciences at University of Virginia and Marymount University. He is adjunct faculty at Northern Virginia Community College. From 1985 to 1989 he was president of the American Society of Naval Engineers. In the Navy he served at Applied Physics Laboratory/The Johns Hopkins University then aboard USSBoston(CAG-1) and played leading roles in several weapon system developments inertial navigation (Polaris) deep submergence (DSRV) and advanced ship designs (SES). He later was director Combat System Integration Naval Sea Systems Command and head Combat Projects Naval Ship Engineering Center. In 1975 he became a major project manager and led the Navy's High Energy Lasers Program in 1981 he was assigned all Navy Directed Energy Weapons development efforts. He was vice president advanced tech

The military services are being moved in the direction of performance-based specifications and standards. They are being steered against dictating ''how to'' produce an item since such action forecloses on the ability to gain access to components or technology that may have a commercial equivalent. Why should the engineering community embrace the new approach? Aside from the obvious weight of it being approved policy, therefore currently mandated, it warrants examination because it is the correct approach at this time when applied to appropriate products. Military specifications and standards are to be displaced then, by acceptable alternative contractor design solutions. Industry bidders will be allowed to propose the particular design details, permitting procurement flexibility by contractually citing only system level or interface requirements, both physical and functional. Hopefully, this can broaden the industrial base and increase competition with reduced costs to follow. Conceptually, the approach appears both performance-sensible and cost-attractive (there are, of course, consequent risks) but how does implementation proceed? Is it possible to pursue the goals envisioned along paths that are not in themselves experimental? Can the American postulate, minimal loss of life and limb to U.S. military people, continue to be honored? Experience and track record elsewhere imply encouraging possibilities in select situations-useful prospects are identified and discussed in practical terms.

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：