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Simulation of electromagnetic radiation and scattering using a finite difference-time domain technique

Computer Applications in engineering Education 1992年第1期1卷 45-45页

作者： Li, K. Tassoudji, M.A. Shin, R.T. Kong, J.A. Department of Electrical Engineering and Computer Science and Research Laboratory of Electronics Massachusetts Institute of Technology Cambridge Massachusetts 02139 Kevin Li:received his BS and SM degrees (1990) in Electrical Engineering and EE (Electrical Engineer's) degree (1991) from the Massachusetts Institute of Technology where he is currently pursuing his PhD in Electrical Engineering. Since 1990 he has been the recipient of a United States Air Force Laboratory Graduate Fellowship. His main research interests include electromagnetic scattering radar cross section prediction and numerical techniques. Mr. Li is a member of Tau Beta Pi and a student member of IEEE. M. Ali Tassoudji:received his BS (1987) and MS (1989) degrees in Electrical Engineering from the University of Michigan Ann Arbor. Since 1989 he has been a research assistant at the Massachusetts Institute of Technology where he is currently working towards his PhD in Electrical Engineering. His research interests include electromagnetic scattering and propagation modeling of microwave circuits and numerical techniques. Mr. Tassoudji is a member of IEEE and Eta Kappa Nu. Robert T. Shin:received his SB (1977) SM (1980) and PhD (1984) in Electrical Engineering from the Massachusetts Institute of Technology. Since 1984 he has been a member of the Air Defense Techniques Group at MIT Lincoln Laboratory as a Research Staff member and as a Senior Staff member from 1989. His research interests are in the areas of electromagnetic wave scattering and propagation theoretical model development and data interpretation for microwave remote sensing. He is the coauthor ofTheory of Microwave Remote Sensing(Wiley 1985). Dr. Shin is a member of The Electromagnetics Academy IEEE American Geophysical Union Tau Beta Pi Eta Kappa Nu and Commission F of the International Union of Radio Science. Since 1987 he has served on the Editorial Board of theJournal of Electromagnetic Waves and Applications(JEWA). Jin Au Kong:is Professor of Electrical Enginee

The finite difference-time domain (FD-TD) technique is applied to the solution of Maxwell's equations. A computer program, which can be used to simulate and study numerous electromagnetic phenomena, is developed and implemented on an IBM 386 compatible personal computer. The FD-TD technique is a useful tool for students in electromagnetics. The technique is flexible and can be applied to many basic EM scattering and radiation problems. Because field solutions are found as a function of time, visualization of the propagation of the EM fields is possible. The FD-TD technique is implemented for a two-dimensional rectangular grid in conjunction with a second-order absorbing boundary condition. Both E- and H-field polarizations are analyzed. Finite objects consisting of dielectric, magnetic and conducting materials, and perfectly conducting infinite ground planes are modeled. Plane wave and line current sources are implemented. In addition to the capability of animating the propagation of the EM fields, radiation and scattering patterns can be generated.

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ADAPTING AVAILABLE FINITE-ELEMENT STRUCTURAL PROGRAMS TO SOLVE 3-DIMENSIONAL HIGH-FREQUENCY ELECTROMAGNETIC PROBLEMS

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INTERNATIONAL JOURNAL OF MICROWAVE AND MILLIMETER-WAVE COMPUTER-AIDED engineering 1991年第4期1卷 386-394页

作者： NAVARRO, EA FEMENIA, JM SUCH, V Departamento de Fisica Aplicada Universitat de València C Doctor Moliner 50.46100 Burjassot (València) Spain Enrique A. Navarro was born in Sueca (Valéncia) Spain on January 18 1965. He received the Licenciado degree in Physics from the Universitat de Valéncia Spain in 1988. After working on Systems Simulation at GMV S.A. Madrid. Spain. he returned to the Universitat de Valéncia in 1980 where he began to study for the PhD degree in the Department de Fésica Aplicada. Universitat de Valéncia Spain. He is currently Assistant Professor in the Department of Applied Physics. His rescarch interests are in the area of microwave engineering and numerical method for solving electromagnetic wave propagation problems. Jose M. Femenia was born in Segorbe (Castellón) Spain in 1962. He obtained in Physics from the the Licenciado degree in Physics from the Universitat de Valéncia Spain in 1987 Universitat. After working in Laser and Optical Technology in the Department d'Optica di la Universitat de Valéncia he received a grant to work in numerical techniques for electromagnetics in the Departnment de Fisica Aplicada. He currently works in Computer Science and Communications in the Servei d'lnformàtica de la Universitat de Valéncia. Vicente Such was born in Valéncia Spain on August 10 1943. He received the Licenciado degree in Physics in 1967 and the PhD degree in 1971 both from the Universitat de Valéncia Spain. From 1967 to 1974 he was Assistant Professor with the Department of Electricity and Magnetism Universitat de Valéncia and with the Universitat Politécnica de Valkncia. From1974 to 1981 he was Professor of Electricity and Magnetism at the Universitat de Extremadura Universitat de Valéncia and Universidad de Palma de Mallorca Spain. He is now a Professor in the Department of Applied Physics at Universitat de Valéncia. His current research interests deal with microstrip antennas arrays Microwave passsive circuits and computer methods in electromagnetics.

The adaptation of available structural mechanics software to solve microwave problems is possible by the analogy between the differential equations. A brief review of the analogy between transverse or shear waves in elasticity and electromagnetic waves is presented, followed by a more detailed discussion of the adaptation of a program to obtain the resonant frequencies of a rectangular resonant cavity, doing a three-dimensional analysis. The geometry of the electric field is also obtained for the resonant modes.

关键词： Microwaves

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FULL-WAVE SOLUTION OF DIELECTRIC LOADED WAVE-GUIDES AND SHIELDED MICROSTRIPS UTILIZING FINITE-DIFFERENCE AND THE CONJUGATE-GRADIENT METHOD

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INTERNATIONAL JOURNAL OF MICROWAVE AND MILLIMETER-WAVE COMPUTER-AIDED engineering 1991年第4期1卷 346-357页

作者： NARAYANAN, V MANELA, M LADE, RK SARKAR, TK Department of Electrical and Computer Engineering Syracuse University Syracuse New York 13244-1240 Viswanathan Narayanan was born in Bangalore India on December 14 1965. He received the BE degree in Electronics and Communications from B.M.S. College of Engineering Bangalore in 1988. He joined the Department of Electrical Engineering at Syracuse University for his graduate studies in 1989 where he is currently a research assistant. His research interests are in microwave measurements numerical electromagnetics and signal processing. Biographies and photos are not available for M. Manela and R. K. Lade. Tapan K. Sarkar (Sf69-M'76-SM'X1) was born in Calcutta. India on August 2 1948. He received the BTech degree from the Indian Institute of Technology Kharagpur India in 1969 the MScE degree from the University of New Brunswick Fredericton Canada in 1971. and the MS and PhD degrees from Syracuse University. Syracuse NY in 1975. From 1975-1976 he was with the TACO Division of the General Instruments Corporation. He was with the Rochester Institute of Technology (Rochester NY) from 1976-1985. He was a Research Fellow at the Gordon Mckay Laboratory Harvard University Cambridge MA from 1977 to 1978. He is now a Professor in the Department of Electrical and Computer Engineering Syracuse University. His current research interests deal with numerical solutions of operator equations arising in electromagnetics and signal processing with application to system design. He obtained one of the “ best solution” awards in May 1977 at the Rome Air Development Center (RADC) Spectral Estimation Workshop. He has authored or coauthored more than 154 journal articles and conference papers and has written chapters in eight books. Dr. Sarkar is a registered professional engineer in the state of New York. He received the Best Paper Award of the IEEE Transactions on Electromagnetic Compatibility in 1979. He was an Associate Editor for feature articles of the lEEE Antennas arid Propagation Sociefy Newsletter and was

Dynamic analysis of waveguide structures containing dielectric and metal strips is presented. The analysis utilizes a finite difference frequency domain procedure to reduce the problem to a symmetric matrix eigenvalue problem. Since the matrix is also sparse, the eigenvalue problem can be solved quickly and efficiently using the conjugate gradient method resulting in considerable savings in computer storage and time. Comparison is made with the analytical solution for the loaded dielectric waveguide case. For the microstrip case, we get both waveguide modes and quasi-TEM modes. The quasi-TEM modes in the limit of zero frequency are checked with the static analysis which also uses finite difference. Some of the quasi-TEM modes are spurious. This article describes their origin and discusses how to eliminate them. Numerical results are presented to illustrate the principles.

关键词： Waveguides

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Static hazards of drum filling. II. Electrostatic models: Theory and experiment

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Process Safety Progress 1988年第1期7卷 63-78页

作者： Laurence G. Britton Jack A. Smith Larry Britton earned BS and PhD degrees in Fuel and Combustion Science at Leeds University England. After four years as Research Fellow in Applied Electrostatics at Southampton University he joined Union Carbide's Safety Research Laboratory in 1981 and is currently a Project Scientist. He is a Fellow of the Institute of Energy a Member of AIChE and the Combustion Institute and is a Chartered Engineer in the UK. He was cowinner of the AIChE “Bill Doyle” Award in 1987. Larry serves on the “Classification and Properties of Flammable Liquids” and “Properties of Hazardous Chemicals” committees of the NFPA. Jack Smith is a staff engineer for the Applied Mathematics and Process Simulation group of Central Research and Engineering at Union Carbide specializing in software development for engineering workstations and computational chemistry. He holds M.S. and Ph.D. degrees from the University of Florida in chemical physics and a B.S. from Purdue University in chemistry and mathematics.

For drum filling, a demarcation of 50 pS/m (below which a liquid may accumulate hazardous static in a grounded drum) is conservative and takes account of the effects of temperature and/or charge density on relaxation rate. The worst-case conductivity as regards static accumulation rate is about 0.5 pS/m, but in practice this should not correspond to the worst-case charge generation rate. Published forms of the Schon equation are not conservative for smooth-bore pipes and hoses; a new equation is proposed. Certain rough-bore hoses containing an inner grounding spiral can generate almost as much charge as a microfilter. Theory and experiment are discussed with reference to published Codes and Guidelines; attention is given to filter placement and drum linings.

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USE OF ORTHOGONAL COLLOCATION APPROXIMATION FOR PARAMETER-IDENTIFICATION AND CONTROL OPTIMIZATION OF A DISTRIBUTED PARAMETER BIOLOGICAL REACTOR

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BIOTECHNOLOGY PROGRESS 1987年第4期3卷 248-258页

作者： ISAACS, S THOMA, M MUNACK, A Institut für Regelungstechnik Universität Hannover Appelstr. 11 D-3000 Hannover Federal Republic of Germany Steven Isaacs:received a Bachelor of Science degree from MIT in 1976 and a Master of Science degree from the University of California at Berkeley in 1978 both in chemical engineering. He has been employed by the IBM Corporation in San Jose California and was a member of the engineering staff at the Solar Energy Research Institute in Golden Colorado in the area of Biofuels. Since 1985 he has been employed at the Institute for Automatic Control at the University of Hannover. West Germany where he is working toward a PhD degree in the control of biological processes Axel Munack:received an electrical engineering degree in 1974 and a doctoral degree in control engineering in 1980 both from the University of Hannover. From 1974 to 1985 he was employed at the Institute for Automatic Control at the University of Hannover and since summer 1985 he has been a professor at the Technical University of Hamburg-Harburg. His main areas of scientific interest are distributed parameter systems from the theoretical side and with regard to applications modeling optimization and control of biotechnical processes Technische Universität Hamburg-Harburg Arbeitsbereich Regelungstechnik EiBendorfer Str. 38 2100 Hamburg 90 Federal Republic of West Germany Manfred Thoma:received the Dipl.-Ing. in electrical engineering and the Dr.-Ing. degree from the University of Darmstadt in 1957 and 1963 respectively. He held teaching and research positions at Darmstadt University and was a visiting professor at Purdue University Lafayette Indiana. Since 1967 he has been Professor of the Chair of Automatic Control at Hannover University. In addition he spent three months during 1977 as visiting professor at Kyoto University Japan. Professor Thoma has been with International Federation of Automatic Control since 1972 in different capacities. He is Past President of IFAC. He is a member of a number of scientific and professi

The orthogonal collocation method of approximation is applied to the differential equations describing the oxygen concentration profiles in the liquid and gas phases of the tower loop airlift reactor. This provides a relatively quick simulation method that can be used for the parameter identification and control optimization tasks of the Open Loop Feedback Optimal (OLFO) adaptive control algorithm. Results of simulated cell mass fermentations are compared to that of a slower, more accurate finite difference simulation method showing the effects of collocation order on approximation accuracy and computation time. An example of parameter identification of the spatially dependent oxygen mass transfer coefficient and the overall growth rate is provided. Also, an example is included showing the optimization of air feed rate policy over the course of a fermentation.

关键词： BIOREACTORS

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Reading Retardation or Linguistic Deficit? III: a Further Examination of Response Strategies in a Reading Test Completed by Hearing‐impaired Children

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Journal of Research in Reading 1983年第1期6卷 19-28页

作者： Beggs, W.D.A. Breslaw, P.I. W.D. Alan Beggs is a Research Fellow now working in the Blind Mobility Research Unit within the Department of Psychology at Nottingham. He obtained his first degree in Psychology from Queens University Belfast and holds a PhD from the University of Nottingham. His interests and publications have covered perceptual illusions the control of voluntary movement information processing in reading eye movements in reading clumsiness and auditory spatial knowledge in the deaf. Dr Beggs' address is Blind Mobility Research Unit Department of Psychology University of Nottingham University Park Nottingham NG7 2RD UK. W.D.A. BEGGS Blind Mobility Research Unit Department of Psychology University of Nottingham University Park Nottingham NG7 2RD UK. P.I. BRESLAW Department of Psychology University of Nottingham University Park Nottingham NG7 2RD UK. Paul I. Breslaw was a Research Assistant in the Department of Psychology at the University of Nottingham for a number of years until 1981. During that period he contributed to research projects in the automatic generation of variables in computer controlled experiments the study of on-line techniques for eye-movement recording during reading problem solving and paced aiming and the development of communicative competence in deaf children. He holds a BSc from the University of Sussex and an MPhil from Nottingham. He has recently turned his attention exclusively to computer science and runs his own software consultancy for real time and robot applications in psychology and engineering. He may be contacted at the Department of Psychology University of Nottingham University Park Nottingham NG7 2RD UK.

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CORROSION FATIGUE AT HIGH FREQUENCIES

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NAVAL ENGINEERS JOURNAL 1971年第6期83卷 44-&页

作者： JOLLIFF, JV The authorgraduated from the Naval Academy in 1954. Following graduation he served aboard USS SAMUEL N. MOORE (DD-747) as Engineering Officer and USS CIMARRON (AO 22) as First Lieutenant and Gunnery Officer. After a short tour as Ship Superintendent Long Beach Shipyard he attended Webb Institute of Naval Architecture for three years while studying Naval Construction and Engineering. After receipt of a Master of Science in Naval Architecture degree he was designated an Engineering Duty Officer (EDO) and assigned to duty at the Long Beach Naval Shipyard. While there he served in billets of Assistant Repair Superintendent and Assistant Planning and Estimating Superintendent and as such was primarily concerned with the repair and conversion of U.S. naval surface ships. After two years at Long Beach he was ordered to duty as Staff Maintenance Officer Commander Mine Force. U.S. Pacific Fleet. He then served as an instructor in the Engineering Department of the U.S. Naval Academy during which time he was awarded an M.S. in Financial Management from George Washington University. He is currently studying in a PhD program at Catholic University Washington DC.

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THE OCEAN—AN ENGINEER'S CHALLENGE

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Naval Engineers Journal 1971年第5期83卷 61-75页

作者： JOLLIFF, JAMES V. USN The authorgraduated from the Naval Academy in 1954. Following graduation he served aboard USS SAMUEL N. MOORE (DD-T4T) as Engineering Officer and USS CIMARRON (AO 22) as First Lieutenant and Gunnery Officer. After a short tour as Ship Superintendent Long Beach Shipyard he attended Webb Institute of Naval Architecture for three years while studying Naval Construction and Engineering. After receipt of a Master of Science in Naval Architecture degree he was designated an Engineering Duty Officer (EDO) and assigned to duty at the Long Beach Naval Shipyard. While there he served in billets of Assistant Repair Superintendent and Assistant Planning and Estimating Superintendent and as such was primarily concerned with the repair and conversion of U. S. naval surface ships. After two years at Long Beach he was ordered to duty as Staff Maintenance Officer Commander Mine Force U. S. Pacific Fleet. He then served as an instructor in the Engineering Department of the U. S. Naval Academy during which time he was awarded an M. S. in Financial Management from George Washington University. He is currently studying in a PhD program at Catholic University Washington D. C.

It has been said that the primary goal of the ocean engineer is to understand the nature of the ocean and to make use of this understanding through his engineering skill for the benefit of mankind. Perhaps these goals can be said to consist of the following pursuits: The scientific study of the world ocean by gathering and analyzing data relating to the ocean, its lithospheric and atmospheric interfaces, and their interrelationships. The development of basic technology for furthering man's extension into the ocean technologies, for example, relating to structures and materials, hydrodynamic shapes, life support systems and sensor phenomena. Specific task accomplishments such as coring the ocean floor, recovering ocean minerals, extending man himself into the sea and countering corrosion. Utilization of the ocean and its resources for purposes of desalinization, weather and climate forecasting, liquid storage, mineral extraction, recreational park development, aquaculture, advanced commercial fishery development, undersea warfare, and proper waste disposal. In fact, there is very little that is done on the continents today, that we should not seek to do in the oceans in the future. © 1971 American Society of Naval Engineers

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EXPERIMENTAL PROGRAM FOR A PLASMA PINCH SPACE ENGINE

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Journal of the American Society for Naval Engineers 1961年第4期73卷 745-761页

作者： GRANET, IRVING GUMAN, WILLIAM J. THE AUTHORS:Irving Granet received his B.M.E. from The Cooper Union his M.M.E. from Polytechnic Institute of Brooklyn has taken Pre-Doctoral Studies at Polytechnic Institute of Brooklyn and is a graduate of the Oak Ridge School of Reactor Technology. He has worked in Republic's Plasma Propulsion Laboratory on nuclear propulsion systems space radiators thermodynamic power cycle considerations for generating electric power and system design and operation for space propulsion. He was formerly Director of Staff Engineering Nuclear Energy Department of Foster Wheeler Corporation where he directed engineering design and analysis for complete nuclear plants. Mr. Granet has taught thermodynamics and heat transfer at the Polytechnic Institute of Brooklyn and at present is Adjunct Assistant Professor of Engineering and Physics at Long Island University. He has published over 40 articles in the fields of thermodynamics applied mechanics heat transfer and nuclear energy. He is a member of the American Society of Mechanical Engineers National Society of Professional Engineers Pi Tan Sigma and Sigma Xi. He is a licensed Professional Engineer in the State of New York. Mr. Granet is listed in the 1960 edition of American Men of Science and is a reviewer for the American Chemical Society's technical publications. William J. Guman received degrees of B. Aero. E. M. Aero E. from and has completed courses for PhD. Aero. E. at Rensselaer Polytechnic Institute. Since coming to Republic in 1959 Mr. Guman has been conducting theoretical and experimental studies on non-steady interactions and flow processes in plasma engine configurations. Mr. Guman was Assistant Professor at Rensselaer Polytechnic Institute lecturing on fluid mechanics aerodynamics performance and stability and conducting laboratory courses in experimental fluid dynamics and wind tunnel research. He also investigated flow induction and -was head of Rensselaer's supersonic wind tunnel laboratory. Mr. Guman performed a theoretical analysis in experimental

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THE MARITIME DILEMMA

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Naval Engineers Journal 1970年第6期82卷 41-48页

作者： JOLLIFF, JAMES V. THE AUTHOR graduated from the Naval Academy in 1954. Following graduation he served aboard USS SAMUEL N. MOORE (DD-747) as Engineering Officer and USS CIMARRON (AO 22) as First Lieutenant and Gunnery Officer. After a short tour as Ship Superintendent Long Beach Shipyard he attended Webb Institute of Naval Architecture for three years while studying Naval Construction and Engineering. After receipt of a Master of Science in Naval Architecture degree he was designated an Engineering Duty Officer (EDO) and assigned to duty at the Long Beach Naval Shipyard. While there he served in billets of Assistant Repair Superintendent and Assistant Planning and Estimating Superintendent and as such was primarily concerned with the repair and conversion of U. S. naval surface ships. After two years at Long Beach he was ordered to duty as Staff Maintenance Officer Commander Mine Force U. S. Pacific Fleet. He then served as an instructor in the Engineering Department of the U. S. Naval Academy during which time he was awarded an M. S. in Financial Management from George Washington University. He is currently studying in a PhD program at Catholic University Washington D. C.

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