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作者： Zou, J. Lui, Y.Q. Yuan, J.S. He, J.L. Cao, L. Lee, J. Chang, S. State Key Lab of Control and Simulation of Power Systems and Generation Equipments Department of Electrical Engineering Tsinghua University Beijing 100084 China Electrical Environment and Transmission Group Korea Electrotechnology Research Institute Changwon 641600 Korea Republic of

A Fredholm integral equation of the first kind has been developed for analyzing the performance of the toroidal high-voltage direct current (HVDC) grounding system buried in the horizontal multilayer soil. The method of moment is used to solve the equations. The formulation of potential in the earth due to a circular current is proposed in closed form by means of conception of the complex resistivity and depth, which leads to the saving of the computational time greatly. The numerical results show the good agreements with those in other papers and the measured data. © 2006 IEEE.

关键词： Electric grounding

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A NEW HIGH‐PRECISION, UNIVERSAL‐FREQUENCY COMPUTER COMPONENT

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Journal of the American Society for Naval Engineers 1950年第2期62卷 325-338页

作者： HERR, DONALD BLUMENSTOCK, NORMAN HONORARY MEMBER THE AUTHORS MR. HERR Honorary Member of the A.S.N.E. has the B.S. in E.E. M.S. in E.E. and E.E. degrees. He was National Coffin Foundation Fellow of the General Electric Company National Tau Beta Pi Fellow and National Sigma Tau Fellow at the Moore School of Electrical Engineering University of Pennsylvania and at M.I.T. prior to World War II. He was also awarded a National Gordon McKay Fellowship by Harvard University and received the A. Atwater Kent Award in Electrical Engineering from the University of Pennsylvania. A licensed radio amateur at 12 Mr. Herr first worked summers at RCA and Bell Laboratories and was with the General Electric Company in 1939 and 1940 as development engineer before volunteering for over five years of active Naval duty. He served as Officer-in-Charge Electrical Minesweeping Group Bureau of Ships December 1940 to April 1943 as Acting Design Superintendent and Officer-in-Charge Los Angeles-Long Beach Harbor Surge Investigation U. S. Naval Shipyard Terminal Island to November 1944 and as Research-Patents Liaison Officer Office of Naval Research to January 1946 returning to inactive duty as lieutenant commander U.S.N.R. Mr. Herr received two Navy letters of commendation. Since 1946 he was assistant to vice president in charge of the engineering division of Control Instrument Company Brooklyn New York and is project engineer at the Reeves Instrument Corporation responsible for new servo and computer component developments. Mr. Herr has been associated with Dean Harold Pender and Professor Ernst Guillemin in advanced network theory and has specialized for 12 years in development and design of servomechanisms differential analyzers computers and fire control systems utilizing advanced network analysis and synthesis methods. Mr. Herr is also presently teaching servomechanisms network-synthesis and feedback amplifier design in the Graduate School of the Polytechnic Institute of Brooklyn. He has contributed frequently to the JOURNAL OF THE AMERICA

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International Conference on Electrical and Computer engineering

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Conference Papers in Science 1000年第1期2013卷

作者： Mohammed Elmusrati Ahmed Gaouda Heikki Koivo Mohammed Buamod Saeid Belkasim Communication and Systems Engineering Group University of Vaasa Vaasa Finlanduva.fi Department of Electrical Engineering UAEU Al-Ain United Arab Emiratesuaeu.ac.ae Control Engineering Group Aalto University Espoo Finlandaalto.fi/en Department of Electrical and Electronic Engineering University of Benghazi Benghazi Libyauob.edu.ly Department of Computer Science Georgia State University Atlanta GA USAgsu.edu

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Model Reduction Methods for Complex Network systems

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control, Robotics, and Autonomous systems 1000年第1期4卷 425-453页

作者： X. Cheng J.M.A. Scherpen 1Control Systems Group Department of Electrical Engineering Eindhoven University of Technology 5600 MB Eindhoven The Netherlands email: x.cheng@tue.nl 2Jan C. Willems Center for Systems and Control Engineering and Technology Institute Groningen (ENTEG) University of Groningen 9747 AG Groningen The Netherlands email: j.m.a.scherpen@rug.nl

Network systems consist of subsystems and their interconnections and provide a powerful framework for the analysis, modeling, and control of complex systems. However, subsystems may have high-dimensional dynamics and a large number of complex interconnections, and it is therefore relevant to study reduction methods for network systems. Here, we provide an overview of reduction methods for both the topological (interconnection) structure of a network and the dynamics of the nodes while preserving structural properties of the network. We first review topological complexity reduction methods based on graph clustering and aggregation, producing a reduced-order network model. Next, we consider reduction of the nodal dynamics using extensions of classical methods while preserving the stability and synchronization properties. Finally, we present a structure-preserving generalized balancing method for simultaneously simplifying the topological structure and the order of the nodal dynamics.

关键词： reduced-order modeling network systems interconnected systems multiagent systems graph clustering synchronization semistability structure-preserving

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Analysis of foundation grounding system buried in a horizontal multilayer soil by means of the fictitious conductivity concept

Analysis of foundation grounding system buried in a horizont...

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作者： Zou, J. Lee, J.B. Chang, S.H. Zhang, B. He, J.L. Ji, Y.F. State Key Lab. of Control and Simulation of Power Systems and Generation Equipment Department of Electrical Engineering Tsinghua University Beijing 100084 China Electrical Environment and Transmission Group Korea Electrotechnology Research Institute Changwon 641600 Korea Republic of

The theoretical model for the analysis of grounding system encased in the foundation region in a horizontal multilayer soil is presented. By means of fictitious conductivity concept, the effects of foundation are replaced by a set of equivalent current sources. The analysis of grounding system can be carried out by combining the moment method with additional equivalent current sources. The main advantage of the proposed approach is that it can be linked with the existing codes easily. The results are compared with those found in the literature and obtained by other popular software. © 2007 IEEE.

关键词： Electric grounding

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US NAVY GAS TURBINE POWERED OCEAN ESCORT

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NAVAL ENGINEERS JOURNAL 1969年第4期81卷 53-&页

作者： MARRON, HW BAYLES, GC ROBINSON, PG MITCHELL, WD Hugh Marron a native of Pennsylvania received his Bachelor of Science Degree in Civil Engineering from the Pennsylvania State University in 1939. Upon graduation he was employed for one year with the Pennsylvania Department of Highways as a construction engineer. In July 1940 he became a Marine Engineer at the Philadelphia Naval Shipyard where after a period of apprenticeship and special training in this new field he was assigned to the Machinery Scientific Group of the Design Division. In October 1945 he was transferred to the Design Division of the Bureau of Ships. Mr. Marron is now Head of the Project Coordination Office in the Machinery Systems Division of the Naval Ship Engineering Center. Mr. Marron is a member of ASNE ASE. Grover C. Bayles joined NAVSEC in February 1966 upon concluding a career in private industry in the allied field of engineering application of naval machinery. Responsibilities in NAVSEC have centered upon the application of gas turbine engines to naval combatant ships. Efforts have been directed primarily to technical coordination of procurement development of software requirements and technical liaison between the contractor and NAVSHIPS for the procurement of propulsion systems. Mr. Bayles is a member of ASNE ASE. Peter Robinson a native of Maine graduated from the Maine Maritime Academy in 1956 and received his Bachelor of Marine Science Degree U.S. Coast Guard License and Commission in the U.S. Naval Reserve. He presently holds a Second Assistant Engineers License for steam vessels. After a tour as Main Engines Officer aboard an aircraft carrier and some merchant service he entered the University of Maine. After four years he received his Bachelor of Science Degree in Mechanical Engineering. Upon graduation he was employed for four years with the Portsmouth Naval Shipyard in the Nuclear Power Division primarily in the Test Group. Mr. Robinson came to NAVSEC in 1966 and is presently employed in the Propulsion Systems Analysis Branch as a Marine Engineer. Mr. Robinson is

“This article is from a paper presented in Washington, D. C. at the Association of Senior Engineers Naval Ship System Command 6th Annual Technical Symposium. The paper describes the special features of a gas turbine propulsion system concept of integrating high horsepower and C. P. propellers into a complete propulsion system. This advanced propulsion system design is unique in that it was developed to fit into an existing D. E. ship design and proposed for the fiscal year 1968 building program. The ship has been cancelled, however, the design should be of interest to people both within the Navy and in that sector of private industry concerned with the future of our Navy shipbuilding programs. The focus is now on the gas turbine as a prime mover for warships, and it seems likely that there will be an increased emphasis on the use of gas turbines in the U.S. Navy's future shipbuilding programs.”

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ADAPTIVE ANTENNA systems

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PROCEEDINGS OF THE INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS 1967年第12期55卷 2143-+页

作者： WIDROW, B MANTEY, PE GRIFFITHS, LJ GOODE, BB Department of Electrical Engineering University of Stanford Stanford CA USA Control and Dynamical Systems Group IBM San Jose CA USA

A system consisting of an antenna array and an adaptive processor can perform filtering in both the space and the frequency domains, thus reducing the sensitivity of the signal-receiving system to interfering directional noise sources. Variable weights of a signal processor can be automatically adjusted by a simple adaptive technique based on the least-mean-squares (LMS) algorithm. During the adaptive process an injected pilot signal simulates a received signal from a desired "look" direction. This allows the array to be "trained" so that its directivity pattern has a main lobe in the previously specified look direction. At the same time, the array processing system can reject any incident noises, whose directions of propagation are different from the desired look direction, by forming appropriate nulls in the antenna directivity pattern. The array adapts itself to form a main lobe, with its direction and bandwidth determined by the pilot signal, and to reject signals or noises occurring outside the main lobe as well as possible in the minimum mean-square error sense. Several examples illustrate the convergence of the LMS adaptation procedure toward the corresponding Wiener optimum solutions. Rates of adaptation and misadjustments of the solutions are predicted theoretically and checked experimentally. Substantial reductions in noise reception are demonstrated in computer-simulated experiments. The techniques described are applicable to signal-receiving arrays for use over a wide range of frequencies.

关键词： Adaptive systems Adaptive arrays Signal processing Directive antennas Noise reduction Least squares approximation Antenna arrays Adaptive filters Filtering Frequency domain analysis

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Modern practice in servo design /

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1970年

作者： Wilson Derek Rober

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TWO NEW ECONOMICAL COMPUTERS FOR THE DESIGN AND ANALYSIS OF SERVOMECHANISMS, NETWORKS, AMPLIFIERS, AND ANALOGOUS DYNAMICAL systems

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Journal of the American Society for Naval Engineers 1951年第4期63卷 851-871页

作者： HERR, DONALD HONORARY MEMBER THE AUTHOR:Mr.Herr Honorary Member of the A.S.N.E. has the B.S. in E.E. M.S. in E.E. and E.E. degrees. He was National Coffin Foundation Fellow of the General Electric Company National Tau Beta Pi Fellow and National Sigma Tau Fellow at the Moore School of Electrical Engineering University of Pennsylvania and at M.I.T. prior to World War II. He was also awarded a National Gordon McKay Fellowship by Harvard University and received the A. Atwater Kent Award in Electrical Engineering from the University of Pennsylvania. A licensed radio amateur at 12 Mr. Herr first worked summers at RCA and Bell Laboratories and was with the General Electric Company in 1939 and 1940 as development engineer before volunteering for over five years of active Naval duty. He served as Officer-in-Charge Electrical Minesweeping Group Bureau of Ships December 1940 to April 1943 as Acting Design Superintendent and Officer-in-Charge Los Angeles-Long Beach Harbor Surge Investigation U. S. Naval Shipyard Terminal Island to November 1944 and as Research-Patents Liaison Officer Office of Naval Research to January 1946 returning to inactive duty as lieutenant commander U.S.N.R. Mr. Herr received two Navy letters of commendation. Since 1946 he was assistant to vice president in charge of the engineering division of Control Instrument Company Brooklyn New York and is project engineer at the Reeves Instrument Corporation responsible for new servo and computer component developments. Mr. Herr has been associated with Dean Harold Pender and Professor Ernst Guillemin in advanced network theory and has specialized for 12 years in development and design of servomechanisms differential analyzers computers and fire control systems utilizing advanced network analysis and synthesis methods. He has contributed frequently to the JournalOF THE AmericanSocietyOF NavalEngineersand was the Society's 1945 Prize Essayist on the subject: “Engineering in the Navy as seen by an Active Reserve Officer.” He is senior member of the I.R.E

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control of ship fouling in U.S. Navy

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Naval Engineers Journal 1967年第N 1期v 79卷 p77-85页

作者： Birnbaum, L.S. Bukzin, E.A. Saroyan, J.R. Leon S. Birnbaum holds a B.S. degree in Chemistry from City College of New York. He has completed graduate work in Chemistry at the University of Maryland and Temple University and in Technology and Management at American University. He has been with the Navy Department Washington since 1949 and is currently Head of the Coatings and Chemistry Branch of the Materials Development and Application Office of the Naval Ship Engineering Center. Responsibilities of this Branch include such items as coatings corrosion control techniques insulation chemical cleaning water treatment toxicology and detection and decontamination of biological and chemical warfare agents. Prior to this Mr. Birnbaum was employed in the Industrial Test Laboratory Philadelphia Naval Shipyard from 1938 to 1949. Work during this period included supervision of a section which inspected paints and allied materials and petroleum products to determine their suitability for Naval use and direction of research in fire retardant treatments. He is a member of the American Chemical Society Washington Paint Technical Group. National Association of Corrosion Engineers and the American Society of Naval Engineers. Mr. Bukzin is a research and development program manager in the Naval Ship Systems Command of the Department of the Navy in the fields of non-metallic materials fuels lubricants cold weather operations and several other areas. He is a graduate chemical engineer from New York University with additional training in naval architecture and management which culminated in his participation in the Senior Development Program at Cornell University during the summer of 1960. He has been employed by the Command and its predecessor for the past 2b years and has been in his present position of R&D planning and programming for the past six years. Prior to that his major technical responsibilities were in the field of elastomers and their applications. He received several awards and published a number of papers during those years. Mr. Bukzin is a me

Report on paints used on surface ships and submarines for protection against corrosion and prevention of fouling, and on work connected with development and evaluation of such coatings;experiences with "hot plastic", "cold plastic" and vinyl paints;hazards in use of vinyl paints and safety precautions;test techniques;new toxics (which are only kind so far satisfactory antifouling formulations) under test.

关键词： Ships

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