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P/G% Analysis: A decision-aiding program

IFAC Proceedings Volumes 1986年第17期19卷 137-145页

作者： Stuart Nagel John Long Political Science Department University of Illinois Urbana Illinois U.S.A Director of Marketing Computer Teaching Corporation Champaign Illinois U.S.A

Microcomputers are increasingly being used to aid program evaluators in their word processing, data retrieval, and statistical/mathematical calculations. A new development is the use of microcomputers to process information concerning alternative programs, policies, decisions, or other options in order to aid in deciding which option or combination is the best. Using microcomputers in this way enables one (1) to avoid the drudgery of the arithmetic, (2) to be prompted into clarifying goals, alternatives, and relations, (3) to try numerous changes to see their effects, and (4) to have one's creativity stimulated in developing better program evaluation.

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Numerical experiments on subcritical transition mechanisms

Numerical experiments on subcritical transition mechanisms

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AlAA 23rd Aerospace sciences Meeting, 1985

作者： Zang, Thomas A. Hussaini, M. Yousuff Computational Methods Branch High-speed Aerodynamics Division NASA Langley Research Center HamptonVA United States Institute for Computer Applications in Science and Engineering NASA Langley Research Center HamptonVA United States

A spectral algorithm for simulating three-dimensional, incompressible, parallel shear flows is described. It applies to the channel, to the parallel boundary layer, and to other shear flows with one wall-bounded and two periodic directions. Simulations performed for the channel identify the one nonlinear interaction which is crucial to the secondary instability. Moreover, it is shown that subharmonic instability ensues for Reynolds numbers as low as 1500. Simulations performed for the heated water boundary layer reveal the operation of the secondary instability in this controlled flow. © 1985, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

关键词： Boundary layers

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Spectral methods for modeling supersonic chemically reacting flow fields

Spectral methods for modeling supersonic chemically reacting...

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AlAA 23rd Aerospace sciences Meeting, 1985

作者： Drummond, J. Philip Hussaini, M. Yousuff Zang, Thomas A. Computational Methods Branch High-speed Aerodynamics Division NASA Langley Research Center HamptonVA United States Institute for Computer Applications in Science and Engineering NASA Langley Research Center HamptonVA United States

A partial implicit numerical algorithm has been developed for solving the equations describing chemically reacting supersonic flows. The algorithm employs a two-stage Runge-Kutta method for integrating the equations in time and a Chebyshev spectral method for integrating the equations in space. The accuracy and efficiency of the new technique have been assessed by comparison with an existing implicit finite-difference procedure for modeling chemically reacting flows. The comparison showed that the new procedure yielded equivalent accuracy on much coarser grids as compared to the finite-difference procedure with resultant significant gains in computational efficiency. © 1985, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

关键词： Runge Kutta methods

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SPACE BIOPROCESSING

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BIO-TECHNOLOGY 1985年第9期3卷 786-790页

作者： TODD, P Paul Todd Ph.D. Director of the Bioprocessing and Pharmaceutical Research Center University City Science Center 3401 Market Street Suite 220 Philadelphia PA 19104.REFERENCES Universities Space Research Association Microgravity Biotechnology Working Group "Goals in Microgravity Biotechnology". 1985. Unpublished.Allen R.E. Rhodes P.H. Snyder R.S. Barlow G.H. Bier M. Bigazzi P.E. van Oss C.J. Knox R.J. Seaman G.V.F. Micale F.J. and Vanderhoff J.W. 1977. Column electrophoresis on the Apollo-Soyuz Test Project. Sep. Purif. Meth. 6: 1-59.|ISI|Snyder R.S. Rhodes P.H. Herren B.J. Miller R.Y. Seaman G.V.F. Todd P. Kunze M.E. and Sarnoff B.E. 1985. Analysis of free zone electrophoresis of fixed erythrocytes performed in microgravity. Electrophoresis 6: 3-9.|ISI|Tulp A. 1984. Density gradient electrophoresis of mammalian cells. In Methods of Biochemical Analysis 30: 148-198.Strickler A. and Sacks T. 1973. Continuous free-film electrophoresis: The crescent phenomenon. Prep. Biochem. 3: 269-277.|PubMed|ISI|ChemPort|Morrison D.R. Barlow G.H. Cleveland C. Grindeland R. Hymer W.C. Kunze M.E. Lanham J.W. Lewis M.L. Sarnoff B.E. Todd P. and Wilfinger W. 1984. Electrophoretic separation of kidney and pituitary cells on STS-8. Adv. Space Res. 4: 67-76.|Article|PubMed|ChemPort|Bier M. Palusinski O.A. Mosher R.A. and Saville D.A. 1983. Electrophoresis: Mathematical modeling and computer simulation. Science 219: 1281-1287.|PubMed|ISI|ChemPort|Albertsson P.A. 1971. Partition of Cell Particles and Macromolecules. Wiley- Interscience New York.Brooks D.E. and Bamberger S. 1982. Studies on aqueous two phase polymer systems useful for partitioning of biological material p. 233-240. In Materials Processing in the Reduced Gravity Environment of Space. G. E. Rindone (ed.) Elsevier Science Publ. Co. Inc. New York.Juarez-Salinas H. Engelhorn S.C. Bigbee W.L. Lowry M.A. and Stanker L.H. 1984. Ultrapurification of monoclonal antibodies by high-performanc

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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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computer aids in chemistry

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Analytical Proceedings 1984年第4期21卷 138-148页

作者： Hewins, M. Betteridge, D. Barker, Philip Levitt, B.P. Wellington, C.A. Ahmad, K. Lilley, T. Pye Unicam Ltd. Cambridge CB1 2PX York Street BP Research Centre Middlesex 7W16 7LN Chertsey Road Department of Computer Science Teesside Polytechnic Cleveland Department of Chemistry Imperial College of Science and Technology London SW7 2AZ Department of Chemistry University College of Swansea Swansea SA2 8PP Singleton Park Exploratory Methods Group BP Research Centre Middlesex TW16 7LN Chertsey Road

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CAL SOFTWARE-DESIGN FOR TRANSFERABILITY

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computerS & EDUCATION 1982年第1期6卷 165-174页

作者： BLANDFORD, C Engineering Science (CAL) Program Exchange Computer Assisted Teaching Unit Queen Mary College Mile End Road London E1 4NS England

The successful transfer of CAL software is often thwarted by differences between the computer system on which the software was developed and that on which it is required to be implemented. Facilities which CAL programs may exploit are usually those most vulnerable to change between different computer systems. Drawing upon experience gained in the design, programming, and subsequent transfer of CAL programs in engineering, examples are given of features which may cause problems during implementation and alternatives or improvements are suggested. FORTRAN and GINO-F are proposed as machine and device independent standards, for implementation language and graphics subroutine library, respectively. Good programming practices are described with a view to obtaining readable and easily maintained programs of a sound quality. Importance is placed on modularity in design as the key to writing transportable programs. The idea that every module should conceal some design decisions from all other modules is described with reference to modules that have proved to be particularly useful or advisable. This technique enables a design to be produced in which machine dependencies and difficult design decisions may be confined to a handful of routines. This makes the program more adaptable and gives the teacher and programmer greater freedom to change the implementation, allowing the program to move to any computer system where similar functions can be implemented.

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SHIPBOARD MAIN BOILER AND FEED PUMP CONTROL-SYSTEM ONLINE ALIGNMENT VERIFICATION

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NAVAL ENGINEERS JOURNAL 1982年第6期94卷 39-46页

作者： BANHAM, JW ADAM, DJ James W. Banham:holds positions both as Director of the Machinery Automation Systems Department of the Naval Ship Systems Engineering Station and as Assistant Chairman of the Mechanical and Industrial Engineering Department of Drexel University's Evening College where he holds the rank of Adjunct Associate Professor. He is the author of a text on Numerical Methods Applications in Engineering. In addition to numerous technical papers he is also the author of the ISA film on Boiler Feedwater Control Systems. A registered professional engineer in the state of Pennsylvania Mr. Banham is co-author of a forthcoming handbook on preparing for the Professional Engineering Examination in mechanical engineering. Mr. Banham holds a bachelor of science degree in mechanical engineering from the Pennsylvania State University his graduate studies were taken at the University of Pennsylvania. He is currently a member of the American Society for Engineering Education and the Instrument Society of America. He served as a member of the ISA Education Committee from 1964 through 1973 and as a member of the ISA Power Plant Dynamics Committee since 1969. His service on the latter committee includes terms as Executive Secretary Vice-Chairman and Chairman. Among other honors Mr. Banham was the winner of the Naval Ship Engineering Center's first Technical Achievement Award (1963) Technical Publication Award (1974) and Equal Employment Opportunity Award (1978). He was also the recipient of Drexel University's Laura S. Campbell Award for Excellence in Teaching (1978). He has taught undergraduate courses in classical control theory numerical methods computer programming systems design and analysis and instrumentation. He also teaches systems theory and computer science in an EIT Review and heat transfer in a PE Review conducted by the Drexel University Department of Continuing Professional Education. Mr. David J. Adam:is a Project Engineer in the Naval Sea Systems Command (PMS301) Steam Propulsion Plant Improvement Program where he i

One of the most serious problems encountered in Naval steam plants following World War II was the unreliable performance of boiler and main feedpump pneumatic control systems. In addition to control component and system design deficiencies, these control systems suffered from inadequate methods to measure and adjust system alignment. This paper describes the development of a set of procedures for on-line alignment verification (OLV) of pneumatic main boiler and feedpump control systems. The procedures are designed for use by N avy control system technicians and, in addition to on-line alignment verification, provide guidance for troubleshooting and for performing system alignment. Procedure static checks measure steady state steaming performance and OLV procedure dynamic checks measure the ability of the boiler and control systems to respond to load changes. The paper describes typical control system characteristics that influence OLV procedure content and the supporting analysis that was used to establish alignment criteria ranges that satisfy both steady state and transient performance requirements. Also described is the alignment criteria tolerance analysis along with the steps involved in a typical OLV check procedure development. Descriptions of the various OLV checks, troubleshooting procedures and alignment procedures are provided. Typical shipboard implementation requirements are described and experience to date with the procedures is provided along with a status report on OLV procedure implementations.

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CENTML CONTROL SYSTEM TRAINING THROUGH STA TIC AND DYNAMIC SIMULATION

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Naval Engineers Journal 1980年第2期92卷 196-206页

作者： HALL, EDWIN E. MOSS, DONALD G. NORRIS, CLIFFORD S. PETERSON, HAROLD D. Mr. Edwin E. Hall received his Bachelor's degree in Electronics from Oklahoma City University. He also is a certified College-Level Instructor in the state of Florida and has done graduate work in Computer Science at the University of Florida. As the Technical Publications and Training Manager Simulation and Control Systems Department. General Electric Company Daytona Beach Fla. he currently is responsible for the costing. planning performance scheduling and timely completion of the Department's Technical Manuals and Technical Training Programs. These Training and Manual contracts cover Ship Systems Programs. Simulation Programs. and Communications Programs for the Armed Services and commercial customers. Mr. Hall has over twenty-years experience as a Technical Writer and Instructor and for the past seventeen years has been at the General Electric Company's Daytona Beach Facility. His experience ranges from teaching Basic Electronics and Radar Circuitry as a civilian instructor for the U.S. Army to writing Manuals Proposals Reports Specifications and Brochures for General Electric's product lines. Mr. Donald G. MOSS is a graduate of Kansas State University from which he received both his B.S. degree in Business Administration and his M.S. degree in Electrical Engineering. He is presently a Senior Systems Engineer for Control Systems in the Simulation and Control Systems Department at the General Electric Company's Daytona Beach Facility. He has been employed by General Electric for 23 years — the first seven as an Engineer and Program Manager on the Fire Control Systems for the Fleet Ballistics Missile Program the next six managing the design of control and checkout equipment on the APOLLO Program and the last ten years working on control equipment for the machinery plants of new Navy ships. Over the span of years at General Electric he has worked on propulsion control for the DD-963 propulsion electric plant and auxiliary control for the FFG-7: propulsion boiler burner electric auxiliary and car

Dynamic Simulation is defined as the hardware and software required to present to the student operator visual and audible cues and responses that are the same as those encountered when operating the Control Consoles aborad ship. This type of simulation is considered essential to the development of operator skills for critical tasks. Less critical tasks can be practiced using static simulation devices. This paper discusses the utilization of these types of training devices to train Navy crews. An overview of the Machinery Control Systems of the FFG 7 and AO 177 Class ships is discussed to provide an understanding of state‐of‐the‐art equipment development. The training programs for these two ship Classes are then reviewed to show how simulation devices are currently used by the Training Community, and this is followed by a brief discussion of the additional benefits that also are derived. © 1980 by the American Society of Naval Engineers, Inc.

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METRIC NAVIGATION - CONCEPT AHEAD OF ITS TIME

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NAVAL ENGINEERS JOURNAL 1978年第1期90卷 41-49页

作者： FRASIER, EL USN (RET.) The Authorgraduated from the University of Minnesota from which he received his BS degree in Aeronautical Engineering. In 1968 he completed 25–year's service in the Aviation Branch of the U. S. Navy having enlisted as a Seaman and retired with the rank of Lieutenant Commander. During this period he specialized in electrical electronic and aircraft training and maintenance and for three years was an Instructor in Electrical Engineering at the Electronic Officer's School Naval Air Technical Training Center Memphis Tenn. While teaching he authored a textbook which ultimately led him into extensive research about the Metric System and its various forms. His unique concept for a Base—10 Compass Rose and Clock to make the Metric System a full—scale Base—10 system of measurement is the culmination of an idea that began during his mathematics and science studies at Davis County High School and Weber State College in Utah and was then nurtured throughout his multiple careers as a student at the University of Minnesota as a Physics Teacher at Weber State College as a naval officer and as a freelance writer. After retirement he joined the Boeing Vertol Co. a manufacturer of helicopters and rail cars near Philadelphia as a professional teacher and writer until 1975 during which time he gained recognition as a writer and also prepared successful programs in Computer Assisted Instruction (CAI) and Computer Assisted Troubleshooting (CATS). Currently he is a writer for the Technical Development Co. in Glenolden Pa. a producer of specialized aircraft accessories and condition monitoring equipment. As an author LCdr. Frasier has been the recipient of several awards for the excellence of his technical papers and his narrated slide presentations on the Metric structure and its philosophy recently brought him credit from a member of the American National Metric Council's Staff as one having a comprehension of the International Metric System far beyond that of the average user. His expertise in this fiel

The closely coordinated Base—10 Navigation proposals set forth by the Anther in this paper are based upon the original definition of the meter—length; a definition which should have made Metric Navigation a logic evolution, but did not. Thus, the reader must decide for himself: b Metric Navigation a concept ahead of its time? Or – Is it a concept whose time should have come long ago?

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