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DETERMINATION OF HARMONIC LEVELS IN NON-LINEAR NETWORKS BY COMPUTER-SIMULATION

IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY 1982年第1期24卷 50-52页

作者： GUTMANN, RJ CAMNITZ, LH Solid-State and Microstructures Engineering Division National Science Foundation Electrical Engineering Graduate Program Cornell University Ithaca NY USA

A method of accurately determining harmonic levels in nonlinear networks with periodic excitation is described. Timedomain omain transient analysis is combined with ac steady-state analysis using standard computer-simulation circuit-analysis programs to evaluate low levels of harmonic distortion with appreciably reduced numerical error. The technique is useful in a variety of applications such as mixers, rectifiers, power amplifiers, and switching power supplies.

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ADVANCED CONCEPTS IN CHEMICAL PROPULSION SYSTEMS FOR A 500-TON SUBMERSIBLE

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NAVAL ENGINEERS JOURNAL 1981年第1期93卷 63-75页

作者： URBACH, HB KNAUSS, DT QUANDT, ER Dr. Herman B. Urbach:received his B.A. degree in Chemistry from Indiana University in 1948 his M.A. degree in Physical Chemistry from Columbia University in 1950 his Ph.D. degree in Physical Chemistry from Case-Western Reserve University in 1953 and his M.S. degree in Mechanical Engineering from The George Washington University in 1976. After receiving his doctorate he was employed by Olin Mathieson Corporation Niagara Falls N. Y. as a Group Leader and Research Chemist on rocket fuels borane chemistry and the reactions of oxygen atoms with ozone. In 1959 he joined the United Technology Research Laboratories East Hartford Conn. as a Senior Research Scientist working in the area of fuel cells and electrochemistry. Presently he is a Scientific Staff Assistant in the Power Systems Division David W. Taylor Naval Ship Research and Development Center where since 1965 he has performed research and development studies on fuel cells gas turbines biphase turbines and MHD systems. Additionally Dr. Urbach was a Consultant to the Artificial Heart Program of the National Heart and Lung Institute NIH and presently is a member of the New York Academy of Science Sigma Xi American Chemical Society Electrochemical Society American Institute of Aeronautics and Astronautics and the American Society of Mechanical Engineers. Dr. Donald T. Knauss:received his B.S. degree in Mechanical Engineering from Duke University in 1956 at which time he took employment with the NASA Lewis Research Center Cleveland Ohio. Here he was involved with aircraft propulsion innovations until his entry into military service with the U.S. Air Force. After completing work toward his M.S.M.E. degree at Purdue University in 1962 he was employed by Battelle Memorial Institute Columbia Ohio where he was involved in a variety of projects related to Fluid and Thermal Mechanics. He was later employed by the Ballistic Research Laboratories Aberdeen Proving Ground Md. where he contributed to studies of the physical gas dynamics of hypers

Alternative advanced power systems designed to operate a 500-ton submersible have been examined with respect to overall weight and volume fractions. Two-week and one-month missions, with and without the conventional “at-sea” recharge capability, were considered to evaluate the impact of advanced technologies on non-nuclear submarine design. Candidate air-breathing, primary-power systems studied included Diesel, Closed-Brayton Cycle (CBC), and fuel cells. A number of options for underwater operation were based upon high-energy reactants replenlshable from Base supplies. Another set of options was considered based upon using JP-S fuel with “at-sea” rechargeable secondary power systems, including thermal-energy storage, advanced lithium-sulfur batteries, or flywheels. Replenlshable high-energy reactant systems were, on average, lower in weight and volume than the rechargeable systems for the same submerged-mission profile. Moreover, the replenlshable systems permitted an extended tactical encounter with a maximum duration of 8 to 17 hours at speeds of 30 knots without the need to resurface and recharge a secondary energy storage device. The lowest-weight rechargeable systems in the order of increasing weight were the CBC engine with advanced lithium-sulfur battery, the CBC engine with carbon-block (thermal energy storage), and the Diesel engine with advanced lithium-sulfur battery. The rechargeable systems required unacceptable weight fractions in both missions. The high-energy (replenlshable from Base supplies) systems, with the exception of the heavy acid fuel cell using LOX, were all acceptable candidates for application in the two-week mission. Only the CBC engine with a llthium-sulfurhexaflaoride heat source, the lowest-weight system in both mission groups, was acceptable for the one-month mission.

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BANQUET ADDRESS - TECHNOLOGY IS FUN, ITS THE OTHER THINGS

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NAVAL ENGINEERS JOURNAL 1981年第3期93卷 57-59页

作者： FROSCH, RA President American Association of Engineering Societies Inc Dr. Robert A. Frosch born in New York City on 22 May 1928 attended Columbia University from which he received his B.A. degree in 1947 his M.A. degree in 1949 and his Ph.D. degree in 1952 all in the field of Theoretical Physics. While completing his studies for his doctorate he joined Columbia's Hudson Laboratories in 1951 and worked on naval research projects as a Research Scientist until 1958 when he became the Director Hudson Laboratories a post he held until 1963. From 1965 to 1966 he was Deputy Director Advanced Research Projects Agency (APRA) Department of Defense (DOD) having first joined ARPA in 1963 as the Director for Nuclear Test Detection the position he held until 1965. Since 1969 he also has served as the DOD member of the Committee for Policy Review National Council of Marine Resources and Engineering Development and in 1967 and 1970 as the Chairman of the U.S. Delegation to the Intergovernmental Oceanographic Commission meetings at UNESCO in Paris. In addition he was the Assistant Secretary of the Navy for Research & Development from 1966 to 1973 Assistant Executive Director of the United Nations Environment Program with the rank of Assistant Secretary General of the United Nations from 1973 to 1975 and Assistant Director for Applied Oceanography at the Woods Hole Oceanographic Institution from 1975 until mid-1977. In June 1977 he became the Administrator of the National Aeronautics and Space Agency (NASA) the position he held prior to joining the American Association of Engineering Societies (AAES) Incorporated. On 20 January 1981 he was elected to his present post as President AAES. Additionally he was the Sea Grant Lecturer for the Massachusetts Institute of Technology in 1974 and currently is a National Lecturer for Sigma Xi. During his distinguished career Dr. Frosch has been the recipient of numerous awards among which are the Arthur S. Flemming Award in 1966 the Navy Distinguished Public Service Award in 1

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Space-time tradeoffs for linear recursion 79

Space-time tradeoffs for linear recursion

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6th ACM SIGACT-SIGPLAN Symposium on Principles of programming Languages, POPL 1979

作者： Swamy, Sowmitri Savage, John E. Coordinated Science Laboratory Department of Electrical Engineering University of Illinois UrbanaIL61801 United States Program in Computer Science Division of Engineering Brown University ProvidenceRI02912 United States

ISBN: (纸本)9781450373579

A linear recursive procedure is one in which a procedural call can activate at most one other procedural call. When linear recursion cannot be replaced by iteration, it is usually implemented with a stack of size proportional to the depth of recursion. In this paper we analyze implementations of linear recursion which permit large reductions in storage space at the expense of a small increase in computation time. For example, if the depth of recursion is n, storage space can be reduced to √n at the cost of a constant factor increase in running time. The problem is treated by abstracting linear recursion into the pebbling of a simple graph and for this abstraction we exhibit the optimal space-time tradeoffs. © 1979 ACM.

关键词： Abstracting

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THE FFG–7 GUIDED MISSLE FRIGATE program– MODEL FOR THE FUTURE?

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Naval Engineers Journal 1978年第3期90卷 93-105页

作者： BEECHER, JOHN D. DiTRAPANI, ANTHONY R. Captain John D. Beecher USN:is the Project Manager Guided Missile Frigate Ship Acquisition Project. He holds a BS degree in Naval Science from the U. S. Naval Academy a BS degree in Electrical Engineering from the U. S. Navy Postgraduate School and a MS degree in Aeronautics and Astronautics from MIT. He is a qualified Surface Warfare Officer who served for seventeen years in the unrestricted line. Captain Beecher's military decorations include the Meritorious Service Medal with Star in lieu of Second Award. Mr. Anthony R. DiTrapani:is the Deputy Project Manager of the Guided Missile Frigate Ship Acquisition Project. He received his BS degree in Mechanical Engineering from the University of Wisconsin in 1958. He began his engineering career in the Navy's Bureau of Ships Steam Turbine and Gear Branch. specializing in steam turbine systems for nuclear submarines. In 1962 after completing graduate work at The George Washington University and a Navy–sponsored Electronics Training Program he joined the SQS–26 Sonar Project and served as Head of the Special Projects Section and subsequently the Test and Analysis Section until 1967. In 1967 he was selected to head the ASW Branch and later the Technical Management Plans Division for the DD–963 Ship Acquisition Project. Naval Sea Systems Command until 1971 when he was assigned to the FFG Project.

Late in 1970, Admiral E. R. Zumwalt, Chief of Naval Operations, directed that study begin towards development of a new class of ocean escort, now known as the FFG 7 (Oliver Hazard Perry) Class, to take over some of the duties of the Navy's World War II destroyers as these 25 year old ships are retired from the active Fleet. At the same time, the Department of Defense was significantly revising its basic policies for the development and acquisition of major weapons systems, and the FFG became the Navy's first major ship class acquisition under these new policies. These new policies, as announced in DOD Directive 5000.1, along with the program constraints imposed by the CNO, required the development of a philosophy and approach towards design, test and evaluation and acquisition which was significantly different from previous ship procurements. This paper summarizes the overall acquisition, T&E and logistic support plans for the FFG 7 Class as they were developed and implemented to meet these needs and constraints, discusses the ship trial results, and provides a commentary regarding the effectiveness of the approach and future applicability. © 1978 American Society of Naval Engineers

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Abstracts

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Environmental Management 1977年第1期1卷 67-96页

作者： Frankenfeld, John W. Schulz, Wolfgang McMurty, George J. Petersen, Gary W. May, G. A. Hering, F. S. Schwartz, J. I. Heywood, J. B. Chigier, N. A. Grohse, E. W. Walker, J. D. Colwell, R. R. Petrakis, L. Pergament, H. S. Thorpe, R. D. Schoepf, Richard W. Krzyczkowski, Roman Henneman, Suzanne S. Hudson, Charles L. Putnam, Evelyn S. Thiesen, Donna J. Parks, G. A. McCarty, Perry L. Leckie, J. O. Schrumpf, Barry J. Simonson, G. H. Paine, D. P. Lawrence, R. D. Pyott, W. T. Leh, M. Elders, W. Combs, J. Caplen, T. Harrison, F. L. Wong, K. M. Heft., R. E. Charnell, Robert L. Lehmann, Edward J. Mallon, Lawrence G. Hatfield, Cecile Adams, Gerald H. Johanning, James Talvitie, Antti Noll, Kenneth E. Miller, Terry Smiarowski, Joseph F. Willis, Cleve E. Foster, John H. Schlesinger, Benjamin Daetz, Douglas Lear, Donald U. Smith, Mona F. Hundemann, Audrey S. Crockett, Pernell W. Werner, Kirk G. Carroll, Thomas E. Maase, David L. Genco, Joseph E. Ifeadi, Christopher N. Lowman, F. G. Christensen, S. W. Van Winkle, W. Mattice, J. S. Harrison, Elizabeth A. Barker, James C. Chesness, Jerry L. Smith, Ralph E. Shaheeen, Donald G. Raney, R. Keith Borton, T. Wezernak, C. T. Raney, R. K. Sherwani, Jabbor K. Moreau, David H. Eisenberg, Norman A. Lynch, Cornelius J. Breeding, Roger J. Johnson, J. D. Foster, K. E. Mouat, D. A. Clark, R. Hyden, John William Owen, Wilfred Bayfield, Neil G. Barrow, Graham C. Stolz, Stephanie B. Wienckowski, Louis A. Brown, Betram S. Keyfitz, Nathan Wilson, W. L. Newman, Peter W. G. Bammi, Deepak Bammi, Dalip Goddard, James E. Chisholm, Tony Walsh, Cliff Brennan, Geoffrey Thompson, K. S. Richardson, R. Jensen, Clayton E. Brown, Dail W. Mirabito, John A. Cowing, Thomas G. Binghamton, Suny Siehl, George H. Albrecht, O. W. Alexander, Ariel Barde, Jean -Philippe Darby, William P. McMichael, Francis Clay Dunlap, Robert W. Muckleston, Keith W. Frankenhoff, Charles A. Giulini, Lorenzo T. Wyatt, T. Black, Peter E. Keating, William Thomas Leonard, M. E. Fisher, E. L. Brunelle, M. F. Dickinson, J. E. Pethig, Rudiger Clapham Exxon Research & Engineering Co. Linden Government Research Lab Coast Guard Washington D.C. Department of Transportation Washington D.C. Office For Remote Sensing of Earth Resources. NASA Earth Resources Survey Program Pennsylvania State University Washington D.C. Department of the Navy Washington D.C. Cambridge. Dept. of Mechanical Engineering Massachusetts Inst. of Technology USA Huntsville. School of Graduate Studies and Research Alabama Univ. USA Dept. of Microbiology. Office of Naval Research Maryland Univ. Arlington Research and Development Co. Pittsburgh AeroChem Research Labs. Inc. Princeton Dept. of the Interior Office of Library Services. Bibliographic Series (Final) Washington D.C. Interplan Corp. Santa Barbara Urban Mass Transportation Adm. Washington D.C. Naval Underwater Systems Center Newport Calif. Mercury Project. National Science Found Stanford Univ Washington D.C. Div. of Advanced Environmental Research & Tech. USA Corvallis. NASA Earth Resources Survey Program Oregon State Univ. Washington D.C. Riverside. Inst. of Geophysics and Planetary Physics National Science Foundation California Univ. Washington D.C. Livermore Lawrence Livermore Lab. California Univ. USA Atlantic Oceanographic and Meteorological Labs. National Oceanic and Atmospheric Administration Miami National Technical Information Service Springfield Miami Univ. Coral Gables School of Law National Oceanic and Atmospheric Administration Rockville National Academy of Sciences Office of Sea Grant Washington D. C. School of Law National Oceanic and Atmospheric Administration Office of Sea Grant. Rockville Norman. Dept. of Civil Engineering and Environmental Science. Urban Mass Transportation Administration Oklahoma Univ. Washington D. C. Knoxville.Dept. of Civil Engineering. Federal Highway Administration Tennessee Univ. Washington D. C. Amherst.Water Resources Research Center. Office of Water Research and Technology Massachusetts Univ. Washington D. C. Calif. Dept. of Industria

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Harmonic differential calculus and filtering in Galois fields

Harmonic differential calculus and filtering in Galois field...

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1976 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 1976

作者： Cohn-Sfetcu, S. Gibbs, J.E. Department of Electrical Engineering McMaster University HamiltonONL8S 4L7 Canada Division of Electrical Science National Physical Laboratory Teddington MiddlesexTW11 OLW United Kingdom

The spaces of functions having a finite abelian group as domain and a Galois field as co-domain have found interesting application in digital signal processing: the group characters form an orthogonal basis in such a space, and the corresponding Fourier transform can be used to perform fast convolution with no computation error. This note considers the problem of optimality in designing signal processors in Galois fields;and tries to elucidate the significance of operations in the frequency domain related to the respective Galois-field Fourier transform. This is done by introducing a class of operators on the signal space such that the characters are their eigenfunctions, in the same way that the complex exponentials are the eigenfunctions of the classical Newtonian differentiator. Starting from this definition (originally introduced by J.E. Gibbs in connection with the Walsh functions), we show that the harmonic differentiators thus defined have many properties in common with the classical differentiator. Applications of harmonic differential calculus to a 'harmonic' state-space analysis of finite-valued signal processors are investigated. The note also examines discrete Laplace (z-) transforms in Galois fields. © 1976 Institute of electrical and Electronics Engineers Inc.. All rights reserved.

关键词： Calculations

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Harmonic differential calculus and filtering in Galois fields

Harmonic differential calculus and filtering in Galois field...

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

作者： S. Cohn-Sfetcu J. Gibbs Department of Electrical Engineering McMaster University Hamilton ONT Canada Division of Electrical Science National Physical Laboratory Teddington Middlesex UK

The spaces of functions having a finite abelian group as domain and a Galois field as co-domain have found interesting application in digital signal processing: the group characters form an orthogonal basis in such a space, and the corresponding Fourier transform can be used to perform fast convolution with no computation error. This note considers the problem of optimality in designing signal processors in Galois fields; and tries to elucidate the significance of operations in the frequency domain related to the respective Galois-field Fourier transform. This is done by introducing a class of operators on the signal space such that the characters are their eigenfunctions, in the same way that the complex exponentials are the eigenfunctions of the classical newtonian differentiator. Starting from this definition (originally introduced by J.E. Gibbs in connection with the Walsh functions), we show that the harmonic differentiators thus defined have many properties in common with the classical differentiator. Applications of harmonic differential calculus to a 'harmonic' state-space analysis of finite-valued signal processors are investigated. The note also examines discrete Laplace (z-) transforms in Galois fields.

关键词： Power harmonic filters Calculus Filtering Galois fields Fourier transforms Signal processing Eigenvalues and eigenfunctions Digital signal processing Convolution Process design

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Optimal Placement of Software Monitors Aiding Systematic Testing

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IEEE Transactions on Software engineering 1975年第4期SE-1卷 403-411页

作者： Ramamoorthy, C.V. Kim, K.H. Chen, W.T. Computer Science Division Department of Electrical Engineering and Computer Sciences University of California Berkeley Calif 94720 United States Department of Electrical Engineering Systems and Computer Science Program University of Southern California Los Angeles Calif. United States

The usefulness of software monitors in testing large ‘programs is discussed. Several types of testing strategies based on the use of monitors are surveyed. Since there is a computational overhead involved in employing monitors, attempts are made to minimize the number of monitors employed. This optimization problem is formulated and analyzed in graph-theoretic terms. Implementation aspects are considered through both discussion and examples. Copyright © 1975 by The Institute of electrical and Electronics Engineers, Inc.

关键词： Optimal placement overhead program testing software monitor test-input test-output test-path test-run

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DEVELOPING A WHIP ANTENNA FOR SUBMARINE SERVICE

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Naval Engineers Journal 1963年第4期75卷 769-774页

作者： ALDEN, JOHN D. CARLSON, ARTHUR D. Commander John D. Alden entered the Navy via the V-7 Reserve Midshipman Program in 1942. His World War II submarine duty was aboard USS Lamprey (55372). He attended a post-war course in electronics engineering at MIT followed by sea duty on USS Sea Cat (55399) and USS Palau (CVE 122). Designated for engineering duty in 1950 his duty stations have included Electronic Supply Office Great Lakes SupShips Groton Connecticut San Francisco Naval Shipyard and Bureau of Ships. He has recently reported for duty at Portsmouth Naval Shipyard. Mr. Arthur D. Carlson graduated from the University of Connecticut in 1959 with a Bachelor of Science in Engineering and received his Master of Science in Engineering from the same school in 1963. From 1959 to 1963 he was employed at the U.S. Navy Underwater Sound Laboratory New London Connecticut where he worked on non-electrical problems of submarine antennas. He is presently employed by the Electric Boat Division of General Dynamics in its Applied Mechanics Section.

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