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REDUCTION METHOD OF TRACKING ERRORS DUE TO MULTIPATH WAVES IN DIRECT SEQUENCE SPREAD SPECTRUM SYSTEMS.

Electronics and Communications in Japan, Part I: Communications (English translation of Denshi Tsushin Gakkai Ronbunshi) 1987年第9期70卷 118-126页

作者： Maruyama, Satoshi Iwanami, Yasunori Ikeda, Tetsuo Faculty of Engineering Nagoya Institute of Technology Nagoya Japan 486 Satoshi Maruyama graduated 1983 Dept. Electrical Eng. Fac. Eng. Nagoya Inst. Technology. Completed Master's program 1985 Grad. School and affiliated with Fujitsu Co. Engaged in researches in distance measurement by spread spectrum technique. Tetsuo Ikeda graduated 1961 Dept. Comm. Eng. Fac. Eng. Tohoku University. Completed doctoral program 1966 Grad. School. Assistant 1966 and Assoc. Prof. 1968 Fac. Eng. Tohoku University. Assoc. Prof. 1973 and Prof. 1977 Nagoya Inst. Technology. Engaged in researches in network theory computer networks communication system and electromagnetic environment. Doctor of Eng. Member I.E.E.E. Japan TV Soc. Jap. Inf. Proc. Soc. Jap. Soc. Inf. Comm. and I.E.E.E.

The spread spectrum (SS) communication is a communication system which has excellent characteristics against noise and is suited to the code-division multiplex. This paper describes a method which reduces the tracking phase error in DLL due to multipath waves in SS communication system. The method is based on the model with a single multipath wave.

关键词： RADIO TRANSMISSION

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HARMONIC CHARACTERISTICS AND IMPACT OF UTILITY-INTERACTIVE PHOTOVOLTAIC PROTOTYPES ON THE NUSU DISTRIBUTION FEEDER

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IEEE TRANSACTIONS ON POWER DELIVERY 1986年第2期1卷 121-128页

作者： RANADE, SJ Electric Utility Management Program Department of Electrical and Computer Engineering New Mexico State University Las Cruces NM USA

Nonsimultaneous measurements of voltage and current harmonics associated with the distribution and utility-interactive photovoltaic systems at the Southwest Residential Experiment Station are summarized in this paper. A qualitative analysis of the data is presented. The harmonic impacts of the prototypes-on the distribution system appear to be minimal. Needs in the area of measurement and analysis of harmonic propagation in general systems are identified.

关键词： Photovoltaic systems Solar power generation Prototypes Power harmonic filters Power system harmonics Voltage Data analysis Harmonic analysis Large-scale systems Economies of scale

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Deadlock detection algorithms in distributed database systems 2

Deadlock detection algorithms in distributed database system...

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2nd IEEE International Conference on Data engineering, COMPDEC 1986

作者： Elmagarmid, Ahmed K. Sheth, Amit P. Liu, Hing T. Computer Engineering Program Department of Electrical Engineering Penn. State Univ. United States Honeywell Computer Science Center Golden ValleyMN United States Department of Computer and Information Science Ohio State University United States

In this paper, a centralized deadlock detection algorithm with multiple outstanding requests (CDDMOR) is proposed for use in distributed database systems and transaction-processing systems. This algorithm allows a process to request many resources simultaneously. While a centralized scheme is superior to a completely distributed scheme in terms of performance, a major problem of such a scheme is congestion. Therefore, an important extension to the basic CDDMOR, a partially distributed scheme, is proposed to alleviate the problem of congestion, as well as to take advantage of the result presented by several researchers that global (multisite) deadlocks are infrequent. It takes care of the local (single site) deadlocks without involving other sites and uses centralized deadlock detection only when there is a possibility of global deadlock. © 1986 IEEE.

关键词： Distributed database systems

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Deadlock detection algorithms in distributed database systems

Deadlock detection algorithms in distributed database system...

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International Conference on Data engineering

作者： Ahmed K. Elmagarmid Amit P. Sheth Hing T. Liu Computer Engineering Program Department of Electrical Engineering Penn. State Univ. Honeywell Computer Science Center Golden Valley MN Computer Engineering Program Department of Electrical Engineering Penn. State Univ Department of Computer & Information Science The Ohio State University

关键词： System recovery Detection algorithms Resource management Database systems computers Image edge detection

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SOME PHYSICAL CONCEPTS IN LASER ANGIOPLASTY

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SEMINARS IN INTERVENTIONAL RADIOLOGY 1986年第1期3卷 27-38页

作者： VANGEMERT, MJC WELCH, AJ BONNIER, JJM VALVANO, JW YOON, G RASTEGAR, S *Biomedical Engineering Program The University of Texas at Austin Austin Texas †Department of Cardiology Catharina Hospital Eindhoven The Netherlands ‡During 1984 - 1985 on leave from St. Joseph Hospital of Eindhoven under the sponsorship of the Hospital The Netherlands America Commission for Educational Exchange and The Dutch Organization for the Advancement of Pure Research (ZWO) §Marion E. Forsman Centennial Professor of Electrical and Computer Engineering and Biomedical Engineering

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Efficient management of backtracking in AND-Parallelism 3rd

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3rd International Conference on Logic programming, ICLP 1986

作者： Hermenegildo, M.V. Nasr, R.I. Department of Electrical and Computer Engineering The University of Texas at Austin AustinTX78712 United States Digital Equipment Corporation Assigned Representative Microelectronics and Computer Technology Corporation Artificial Intelligence Program 9430 Research Boulevard AustinTX78759 United States

ISBN: (纸本)9783540164920

A backtracking algorithm for AND-Parallelism and its implementation at the Abstract Machine level are presented: first, a class of AND-Parallelism models based on goal independence is defined, and a generalized version of Restricted AND-Parallelism (RAP) introduced as characteristic of this class. A simple and efficient backtracking algorithm for RAP is then discussed. An implementation scheme is presented for this algorithm which offers minimum overhead, while retaining the performance and storage economy of sequential implementations and taking advantage of goal independence to avoid unnecessary backtracking ("restricted intelligent backtracking"). Finally, the implementation of backtracking in sequential and AND-Parallel systems is explained through a number of examples. © 1986, Springer-Verlag.

关键词： Logic programming

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Analysis and classification of snoring signals

Analysis and classification of snoring signals

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

作者： A. Cohen A. Lieberman Electrical and Computer Engineering DepartmentBioNedical Engineering Program and School of Medicine Ben-Gurion University of the Negev Beersheba Israel

Snoring is a very common phenomenon with both social and clinical effects. The need for a reliable and effective monitoring and analyzing system, for the snoring signal, stems from the recent awareness of the severity of the problem and from the fact that surgical correction procedures are now available. A preliminary analysis of the snoring signal is presented. Some features, describing the signal are presented. The airway area model is suggested as one of the means to estimate the source and location of the obstruction. The preliminary analysis is demonstrated on a signal recorded from a patient suffering from laryngomalacia. It is shown that the suggested analysis describes the special characteristics of the signal.

关键词： Signal analysis Sleep apnea Surgery Patient monitoring Reliability engineering computerized monitoring Biomedical monitoring electrical resistance measurement Signal generators Blood pressure

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AUTOMATION OF PROPELLER INSPECTION AND FINISHING

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NAVAL ENGINEERS JOURNAL 1985年第4期97卷 124-131页

作者： STERN, H METZGER, R Howard K. Stern:is presently vice president of Robotic Vision Systems Inc. He received a bachelor of electrical engineering degree from College of the City of New York in 1960. Mr. Stern joined Dynell Electronics Corporation in 1971 and became part of the Robotic Vision Systems Inc. staff at the time of its spin-off from Dynell. He was program manager of the various three-dimensional sensing and replication systems constructed by Dynell and Robotic Vision Systems. As program manager his responsibilities encompassed technical administrative and operational areas. The first two portrait sculpture studio systems and the first three replication systems built by Robotic Vision Systems Inc. were designed manufactured and operated under his direction. Before joining Dynell Mr. Stern was a senior engineer at Instrument Systems Corporation and chief engineer of the Special Products Division of General Instrument Corporation. Prior to these positions Mr. Stern was chief engineer of Edo Commercial Corporation. At General Instrument and Edo Commercial he was responsible for the design and manufacture of military and commercial avionics equipment. Mr. Stern is presently responsible for directing the systems design and development for all of the company's programs. Robert J. Metzger:is currently engineering group leader at Robotic Vision Systems Inc. He graduated summa cum laude from the Cooper Union in 1972 with a bachelor of electrical engineering degree. Under sponsorship of a National Science Foundation graduate fellowship he graduated from the Massachusetts Institute of Technology in 1974 with the degrees of electrical engineer and master of science (electrical engineering). In 1979 Mr. Metzger graduated from Polytechnic Institute of New York with the degree of master of science (computer science). Since 1974 Mr. Metzger has been actively engaged in the design of systems and software for noncontact threedimensional optical measurement for both military and commercial applications. Of particular note are his c

Ship's propellers are currently measured by manual procedures using pitchometers, templates and gauges. This measurement process is extremely tedious, labor intensive and time consuming. In an effort to provide increased accuracy, repeatability and cost effectiveness in propeller manufacture, an automated propeller optical measurement system (APOMS) has been built which rapidly and automatically scans an entire ship's propeller using a 3-D vision sensor. This equipment is integrated with a propeller robotic automated templating system (PRATS) and the propeller optical finishing system (PROFS) which robotically template and grind the propeller to its final shape, using the APOMS-derived data for control feedback. The optical scanning and the final shape are both controlled by CAD/CAM data files describing the desired propeller shape. An automated propeller balancing system is incorporated into the PROFS equipment. The APOMS/PRATS/PROFS equipment is expected to provide lower propeller manufacturing costs.

关键词： PROPELLERS

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AIR-CUSHION LANDING CRAFT NAVIGATION

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NAVAL ENGINEERS JOURNAL 1985年第4期97卷 248-260页

作者： GRAHAM, HR KIM, JC BAND, EGU FOWLER, AW Herbert R. Graham:received his degrees of B.S. in 1951 and M.S. in 1958 in aeronautical engineering from the Massachusetts Institute of Technology and the California Institute of Technology respectively. He also attended the Harvard Graduate School of Business Administration. He is presently a task manager at TRW Inc. McLean Virginia responsible for landing craft air cushion (LCAC) engineering support. Since joining TRW in 1967 he has had several technical project management and system engineering responsibilities in amphibious ships transportation and energy. He was responsible for the preliminary engineering design and cost estimates for tracked air cushion vehicles (TACVs). He has been active in several professional societies including ASNE and served as vice-chairman Los Angeles Section American Institute of Aeronautics and Astronautics. John C. Kim:received his degrees of B.S. in electrical engineering Tri-State University 1959 M.S. in electrical engineering Michigan State University 1960 and Ph.D. in electrical engineering Michigan State University. He is presently a senior staff engineer with TRW Inc. McLean Virginia where his technical experience has included communications system engineering and navigation system analysis. Since joining TRW in 1969 he has held numerous positions including section head project manager and department manager. His previous employment includes E-Systems/Melpar Division and Honeywell. Dr. Kim has been active in the IEEE Washington Chapter activities which included secretary vice-chairman and chairman of Systems Science and Cybernetics Group. Edward G.U. Band:received a B.S. degree in mechnical engineering in 1946 and a D.I.C in aeronautical engineering in 1947 at the City and Guilds College of London University. In 1951 he received an M.S. degree from Stevens Institute of Technology in fluid dynamics. After a career in the aircraft industry in England Canada and the U.S.A. he spent several years teaching in Chile and at Webb Institute of Naval Archi

Air cushion vehicles (ACVs) have operated successfully on commercial routes for about twenty years. The routes are normally quite short; the craft are equipped with radar and radio navigation aids and maintain continuous contact with their terminals. Navigation of these craft, therefore, does not present any unusual difficulty. The introduction of air cushion vehicles into military service, however, can present a very different picture, especially when external navigation aids are not available and the craft must navigate by dead reckoning. This paper considers the problems involved when navigating a high-speed air cushion vehicle by dead reckoning in conditions of poor visibility. A method is presented to assess the ACV's navigational capability under these circumstances. A figure of merit is used to determine the sensitivity of factors which affect navigation such as the range of visibility, point-to-point distance, speed, turning radius and accuracy of onboard equipment. The method provides simplistic but adequate answers and can be used effectively to compare the-capability and cost of alternative navigation concepts.

关键词： AIR CUSHION VEHICLES

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ON THE PERFORMANCE OF ISOLATED WORD SPEECH RECOGNIZERS USING VECTOR QUANTIZATION AND TEMPORAL ENERGY CONTOURS

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AT&T BELL LABORATORIES TECHNICAL JOURNAL 1984年第7期63卷 1245-1260页

作者： RABINER, LR PAN, KC SOONG, FK AT&T Bell Laboratories. Lawrence R. Rabiner: S.B. and S.M. 1964 Ph.D. 1967 (Electrical Engineering) The Massachusetts Institute of Technology AT&T Bell Laboratories 1962—. Kok-Chin Pan: S.B. and S.M. 1984 (Electrical Engineering and Computer Science) The Massachusetts Institute of Technology. From 1981 to 1984 Mr. Pan participated in a cooperative program in Electrical Engineering and Computer Science at AT&T Bell Laboratories. Frank K. Soong: B.S. 1973 National Taiwan University M.S. 1977 University of Rhode Island Ph.D. 1983 Stanford University all in Electrical Engineering AT&T Bell Laboratories 1982—.

In this paper we present results of a series of experiments in which combinations of vector quantization and temporal energy contours are incorporated into the standard framework for the word recognizer. We consider two distinct word vocabularies, namely, a set of 10 digits, and a 129-word airlines vocabulary. We show that the incorporation of energy leads to small but consistent improvements in performance for the digits vocabulary; the incorporation of vector quantization (in a judicious manner) leads to small degradation in performance for both vocabularies, but at the same time reduces overall computation of the recognizer by a significant amount. We conclude that a high-performance, moderate-computation, isolated word recognizer can be achieved using vector quantization and the temporal energy contour.

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