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STATISTICAL PROCESS-CONTROL FOR SOFTWARE IN THE MAINTENANCE PHASE

NAVAL ENGINEERS JOURNAL 1993年第3期105卷 192-200页

作者： LUKE, SR JACOBS, DA REED, BM Stephen R. Luke:is a registered professional engineer in the Commonwealth of Virginia. He received his B.S. in mechanical engineering from Virginia Polytechnic Institute in 1983 and is presently pursuing a master's degree in engineering management at Old Dominion University. Mr. Luke is experienced as a test engineer at the Norfolk Naval Shipyard (1978–1989) and as a reliability/quality engineer at the Naval Undersea Warfare Center Detachment Norfolk (1989-Present). Currently he is the group leader of the RMA/QA group for the AN/SQQ-89(V) Antisubmarine Warfare System at Naval Undersea Warfare Center Detachment Norfolk. Mr. Luke is a member of ASNE IEEE (Reliability Society) and ASQC and is an ASQC certified quality engineer and reliability engineer. Derya Alasya Jacobs:is an assistant professor in the Engineering Management Department at Old Dominion University (ODU). She has a B.S. in computer science and an M.S. and Ph.D in engineering management from the University of Missouri-Rolla. Prior to joining ODU Dr. Jacobs worked as a research engineer at the Center for Technology Transfer and Economic Development at the University of Missouri-Rolla. During the same period she served as a consultant in software development for Missouri Enterprise Rolla Missouri. Dr. Jacobs' research interests are in the areas of applied artificial intelligence decision support systems operations research and computer integrated manufacturing. Billie M. Reed:is an assistant professor in the Engineering Management Department at Old Dominion University. He received a B.S. degree in mechanical engineering from Auburn University in 1971. After completing undergraduate studies Dr. Reed was commissioned as an officer in the U.S. Navy where he served in the nuclear submarine force until 1982. Following his military career Dr. Reed worked for nine years as a systems engineer and human-machine interface designer of complex interactive computer based systems for use in aircraft space and ship systems. He received his M.S. and Ph

As technology advances and our dependency on software increases, the requirement to develop the correct means to improve quality in both the deveiopment phase and the maintenance phase of software life cycle support becomes increasingly significant. The focus of this paper is on the dilemma facing software engineering in maintaining quality within the constraints of the maintenance phase. The paper further proposes that the software maintenance process can also be analvzed and improved using statistical process control (SPC) techniques. The methods discussed in this paper have been proposed for use in the Software Maintenance project at NUWC Detachment Norfolk. Upon successful testing at NUWC Detachment Norfolk, they will be forwarded to the AN/SQQ-89(V) (interagencv) Software Quality Evaluation Committee for use by other agencies which are developing and maintaining AN/SQQ-89(V) software.

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Interactive tools for signal processing education. The signal processing instructional facility (SPIF lab) at Washington State University

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Computer Applications in engineering Education 1993年第6期1卷 517-517页

作者： Bamberger, R.H. Signal Processing Instructional Facility School of Electrical Engineering and Computer Science Washington State University Pullman WA 99164-2752 Dr. Roberto H. Bamberger:was born on January 30 1965 in Buenos Aires Argentina. He received his B.E.E and PhD from the Georgia Institute of Technology in 1986 and 1990 respectively. Currently Dr. Bamberger is an assistant professor in the School of Electrical Engineering and Computer Science at Washington State University. Dr. Bamberger's research program is focused on the design implementation and application of multidimensional multirate filter banks subband image and video compression analysis of nonstationary data and application of digital signal processing techniques in the design of analog and mixed-mode integrated circuits. Dr. Bamberger is the founder and director of the Signal Processing Instructional Facility (SPIF Lab) at Washington State University. The SPIF Lab features interactive multimedia-based tools for teaching concepts related to linear systems theory. Dr. Bamberger is active in developing multimedia-based instructional laboratories for a variety of other topics as well. In addition to his teaching and research programs Dr. Bamberger is an associate editor for theIEEE Transactions on Signal Processingand a member of the editorial board forComputer Applications in Engineering Education. Dr. Bamberger is also advisor to the WSU Student Branch of the IEEE and assistant director of the WSU Cougar Marching Band. Dr. Bamberger is a member of Phi Eta Sigma Eta Kappa Nu Tau Beta Pi and Kappa Kappa Psi.

The Signal Processing Instructional Facility (SPIF Lab) is an experiment in using in interactive multimedia for teaching concepts related to linear systems theory and signal processing. The goals of the SPIF lab are to augment, enhance, and interconnect sophomore, junior, and senior level courses with the common thread of linear systems and transforms by unifying the experimentation medium. In this fashion, physical phenomenon is returned to the forefront of engineering education. The laboratory features powerful Mathematica Notebooks (a form of hypertext) and interactive applications that use dedicated DSP microprocessors.

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Measurements of power and current components in unbalanced and distorted three‐phase systems

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European Transactions on Electrical Power 1993年第1期3卷 75-83页

作者： Andria, G. Salvatore, L. Savino, M. Trotta, A. Dr. Gregorio Andria (1956) AEI received the M. S. degree in Electrical Engineering from the State University of Bari/Italy in 1981 and the Ph. D. degree in Electrical Engineering in 1987 from the same University. From 1981 to 1983 he was working in the Electrotechnics and Electronics Department of the University of Bari as a member of the research team on electrical measurements. From 1984 to 1986 he was a Doctoral Fellow and currently he is a researcher in the same department. His research interests are in the fields of electrical and electronic measurements on components and systems including digital measurements for the analysis of electrical quantities in non-sinusoidal systems and the design of integrated optical sensors for measurement and control of non-electrical physical quantities. (Department of Electrotechnics and Electronics Faculty of Engineering polytechnic of Bovia E. Orabona 4 1-70125 Bari. Italy T +3980/242266 Fax + 3980/242410) Prof. Luigi Salvatore (1945) AEI received the degree in electrical engineering from the University of Bari/Italy in 1970. Since 1976 he has worked in the Electrotechnical and Electronic Department of the same University as a member of the research team on electrical machines. From 1983 to 1987 he was a researcher of electrical machines in the same department. Since 1987 he has been an Associate Professor of electrical machines at the University of Bari. At the present time his research interests include the control monitoring and diagnostics of AC drives and the areas of signal processing anddigital measurements on power electronics systems. (Department of Electrotechnics and Electronics Faculty of Engineering Polytechnic of Bari via E. Orabona 4 I-70125 Bari Italy T + 3980/242258 Fax + 3980/242410) Prof. Mario Savino (1947) AEI received the degree in Electrical Engineering from the University of Barif Italy in 1971. Since then he has been working in the Electrotechnical Institute of Bari until 1973 as researcher from 1973 to 1982 as Assistant Profe

The paper deals with the instantaneous power theory in three‐phase circuits by using the instantaneous time phasors of voltage and current. Particularly it is shown that the instantaneous components of the current time‐phasor in a rotating reference frame p‐q, oriented in such a way that the instantaneous voltage time‐phasor points to the p‐axis direction, represent the active and reactive currents. These components give rise to instantaneous real and imaginary powers, respectively. The spectral analysis of the above‐mentioned time‐phasors gives the harmonic symmetrical components of positive and negative sequence of voltage and current three‐phase systems. The line‐by‐line product of the voltage sequence spectrum by the complex conjugate of the current sequence spectrum gives the DC components of the instantaneous real and imaginary powers. The paper shows also that the instantaneous active and reactive currents are different from those defined on grounds of the Fryze's theory, which can be determined from the voltage and current sequence spectra. Copyright © 1993 John Wiley & Sons, Ltd.

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Influence of the pulse‐width modulation control method on the performance of frequency inverter induction motor drives

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European Transactions on Electrical Power 1993年第2期3卷 151-161页

作者： Ch. Andresen, E. Haun, A. Prof. Dr.-Ing. Egon Ch. Andresen (1928) VDE received the Dipl.-Ing. degree in electrical engineering from the Technische Hochschule (University) Darmstadt/Germany in 1954 and the Dr.-Ing. degree in 1959. He joined AEG-Telefunken in Berin/Germany and worked as a Development Engineer in the field of large electrical machines. He served as a Consulting Engineer for electrical drives in Dusseldorf/Germany. Since 1961 he has been responsible for the calculation and design of the AC machine program and in 1965 he became Chief Engineer of the large machine factory of AEG-Telefunken. Berlin. He is currently Professor and head of the “Institut fiir Elektrische Energiewandlung” of the Technische Hochschule Darmstadt. His main research interests are in the field of drive systems advanced motors and power electronics. (Technische Hochschule Darmstadt Institut für Elektrische Energiewandlung Landgraf-Georg-Str. 4 W-6 100 Dnrmstadt. T +496151/162167 Fax 496151/ 165489) Dr.-Ing. Andreas Haun (1960) received his Dipl.-Ing degree in 1986 from the Technische Hochschule (University) Darmstadt/Germany and his Dr.-Ing. degree in 1991 from the same University. From 1986 to 1991 he was working as scientific assistant with the “Institut für Elektrische Energiewandlung” of the Technische Hochschule Darmstadt. He is now with engineering works Goebel Darmstadt. (Maschinenfabrik Goebel Goebelstr. 21 W-6100 Darmstadt T + 496151/88 8401 Fax + 496151/ 8885 20)

The methods of sinusoidal PWM voltage control, current hysteresis control, predictive current control and direct stator flux and torque control are briefly presented. The different operation principles are explained by block and structure diagrams. Their staiorflux and stator current trajectories are compared. The effect on the characteristic operational performance of induction squirrel cage motors is investigated. The harmonic losses of the stator and rotor winding and the torque oscillations are compared while considering the skin effect of the windings. Finally the torque response times are presented. The results are achieved by digital simulation and proved on a test stand with 22 kW induction motor and 30 kVA GTO frequency inverter. Copyright © 1993 John Wiley & Sons, Ltd.

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Optimal re‐configuration of distribution network for loss reduction using non‐linear programming

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European Transactions on Electrical Power 1991年第6期1卷 317-324页

作者： Augugliaro, A. Dusonchet, L. Mangione, S. Antonino Augugliaro (1949) received the Doctor's degree in Electrical Engineering from the University of Palermo Italy in 1975. Since 1976 he has been working as Assistant Professor at the “Istituto di Elettrotecnica ed Elettronica” of the University of Palermo (now: Dipartimento di Ingegneria Elettrica). Since 1978 he is Associate Professor of Electrical Power Generation Plants at the Faculty of Engineering of the same University. His main research interests are in the following fields: simulation of electrical power systems transmission over long distances six-phase transmission mixed power system analysis optimization methods on electrical distribution systems design. (Dipartimento di Ingegneria Elettrica. Universiti di Palermo. Viale delle Scienze 1-90128 Palermo Italy T +3991/48 9856 Fax +3991/488452) Luigi Dusonchet (1948) received the Doctor's degree in Electrical Engineering from the University of Palermo Italy in 1975. Since 1975 he has been working as Assistant Professor at the “Istituto di Elettrotecnica ed Elettronica” of the University of Palermo (now: Dipartimento di Ingegneria Elettrica). From 1978 to 1990 he has been Associate Professor and now he is Full Professor of Industrial Electrical Systems at the Faculty of Engineering of the same University. His main research interests are in the following fields: simulation of electrical power systems optimization methods on electrical distribution systems design. (Dipartimento di Ingegneria Elettrica Universita di Palermo Viale delle Scienze 1-90128 Palermo Italy T +3991/489856 Fax +3991/488452) Stefan0 Mangione (1955) received the Doctor's degree in electrical engineering from the University of Palerrno 'Italy in 198 1. In 1982 he joined the “Istituto di Elettrotecnica ed Elettronica” (now: Dipartimento di Ingegneria Elemica) of the University of Palermo as a Researcher. Since 1983 he has been an Assistant Professor at the same University. His research interests are in the fields of the optimization methods on electrical distribution sy

This paper deals with the problem of optimizing radially operated meshed networks in order to obtain the radial configuration which satisfies the condition of minimum power losses and also the technical constraints normally adopted for such systems. After reporting the state of art on distribution network reconfiguration, the mathematical approach to the solution of the normal state re‐configuration for loss reduction is presented, together with the non‐linear optimization model. In the proposed model, sectionalizing switches are simulated as variable resistances. By starting from the meshed network obtained by closing all switches optimal solution is found directly;the solution is addressed towards the radial structure by some suitable constraints. To solve the problem, a suitable non‐linear programming package is used. Finally some results referring to a hypothetical medium voltage test network are reported. Copyright © 1991 John Wiley & Sons, Ltd.

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New current balancing and power factor improving scheme

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European Transactions on Electrical Power 1991年第5期1卷 261-265页

作者： Gagliardi, F. Lauria, D. Luciano, A.M. Tironi, E. Ubezio, G. Francesco Gagliardi ( 1934) graduated at Naples in Electrical Engineering. He became a Full Professor in Electrical Power Systems in 1972 at University of NaplesAtaly. His researchinterests are electrical power systems power transmission and distribution components and reliability. He is a board member of national compqnies. (University of Naples Electrical Engineering Dep. Via Claudio 21 1-80125 Naples T +39 8 1/7 68 32 13) Davide Lauria ( 1965) received the Electrical Engineering degree from the University of Naples/Italy in 1987. He is a Researcher of the Industrial Department of the University of Cassino. His research interests include electrical power system analysis and simulation. (University of Cassino Industrial Engineering Department Via Zamosch 43 1-03043 Cassino T+39776/31 1084) Angelo M. Luciano (1941) received the Electronics Engineering degree from the University of NaplesAtaly in 1967. From 1967 to 1972 he was Research Assistant with the Electronic Department of the University of Naples. From 1972 to 1980 he was Professor in charge of Nuclear Electronics and since 1980 he has been an Associate Professor of Electronics Engineering at the University. His research interests include switching power systems analysis and design instrumentation and measurements. (University of Naples Electrical Engineering Dep. Via Claudio 2 1 1-80 125 Naples T +39 8 117 68 32 13) group on Electrical Enrico Tironi (1946) received the M. S . degree in Electrical Engineering from the Politecnico di Milano Italy in 1971. In 1972 he joined the Dipartimento di Elettrotecnica of the Politecnico di Milano where he is associate professor at present. His areas of research include: power electronics and harmonics in power systems. Prof. Tironi is a member of the Italian National Research Council (C.N.R.) Power Systems. (University of Milano Electrical Engineering Dep. Piazza Leonard0 da Vinci 32 1-20133 Milano T +392/23 9937 13) Giovanni Ubezio (1952) received the M. S . degree in Electronic Engineering fr

This paper describes the main properties of a new scheme for current balancing and power factor improving of two unbalanced loads. The scheme employs a forced switching two‐phase inverter whose switching output voltage is achieved with PWM modulation. The proposed configuration has safe and reliable operation, permitting furthermore to minimize the harmonic interference transmitted to the network. In the first part of the paper the operating principles of the scheme are carried out and in the second one a possible control strategy is described. Copyright © 1991 John Wiley & Sons, Ltd.

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CONCEPTIONAL CONSIDERATIONS FOR A TOWED VESSEL SAFETY KNOWLEDGE SYSTEM

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NAVAL ENGINEERS JOURNAL 1990年第1期102卷 68-73页

作者： LATORRE, R LESAGE, M Dr. Robert Latorre:received a BSE (Naval Architecture and Marine Engineering) in 1971 and an MSC in 1972 from the University of Michigan. After language training at Middle Language College he studied at the University of Tokyo's Department of Naval Architecture where he received a MSE in 1975 and a doctor of engineering degree in 1978. As an assistant professor at the University of Michigan (1979–1983) Dr. Latorre began his study of towed vessel safety and river tow design. This resulted in a multiyear project sponsored by the U.S. Dept. of Transportation on towed vessel safety. This work was continued after he joined the University of New Orleans where he designed a 38.3m × 4.6m × 0.03–2.1m variable depth towing tank for ship offshore and inland waterway hydrodynamic studies. His research interests include cavitation noise high speed craft design and computational fluid dynamics. During the 1986 academic year he taught as a professor at the University of Tokyo's Mechanical Engineering Department. During this time he began to interact with artificial intelligence robotics and computer vision researchers in Japan. Mauricio Le Sage:received his BSC (bachelor's degree) in 1986. He is a graduate student at the University of New Orleans. His research interests are in the areas of artificial intelligence computer graphics and expert systems. At the time of this paper a joint effort entitled “An Inductive Approach To Plagiarism Detection In Computer Programs” by Gerard K. Rambally and Mauricio Le Sage was pending publication.

A new model is introduced for avoiding accidents where a tugboat capsizes or trips when towing a larger vessel. The development of the Tripping Avoidance Knowledge Base (TAKB) is described in terms of the relevant descriptive parameters, the graphical representation of the knowledge base and its conversion to a decision matrix is also shown. As with any AI application in a new and promising area, there are many unclear points which this paper highlights. The paper closes with the authors' recommendations for future development and refinement of the knowledge base.

关键词： Tugboats

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FLAMMABILITY AND TOXICITY OF COMPOSITE-MATERIALS FOR MARINE VEHICLES

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NAVAL ENGINEERS JOURNAL 1990年第5期102卷 45-54页

作者： SEVART, JL GRIFFIN, OH GURDAL, Z WARNER, GA Jeffrey L. Sevart:is a native of Kansas and a 1985 graduate of Kansas State University with a B.S. in mechanical engineering (magna cum laude). After working as a stress analysis engineer at Boeing Military Airplane Company in Wichita Kans. he attended Virginia Polytechnic Institute and State University and received an M.S. in engineering mechanics in February 1988. He currently resides in Akron Ohio working as a research engineer in tire composites research at The Goodyear Tire and Rubber Company. O. Hayden Griffin Jr.:received his B.S. and M.S. in mechanical engineering from Texas Tech University in 1970 and 1971 respectively. He received his Ph.D. in engineering mechanics from Virginia Polytechnic Institute and State University in 1980. Prior to joining the faculty of Virginia Polytechnic Institute and State University as associate professor of engineering science and mechanics in September 1985 he was employed at the U.S. Naval Surface Warfare Center (Dahlgren Virginia) BF Goodrich Tire Group (Akron Ohio) the Bendix Advanced Technology Center (Columbia Maryland) and the Johns Hopkins University Applied Physics Laboratory (Laurel Maryland). He is currently an associate director of the Virginia Institute for Material Systems. He is a registered professional engineer in Virginia and is a member of the American Society of Mechanical Engineers and the American Society for Composites. Zafer Gürdal:received his M.S. in mechanical and aerospace engineering from Illinois Institute of Technology in 1981 and his Ph.D. in aerospace engineering from Virginia Polytechnic Institute and State University in 1985. He worked as a research associate in the Aerospace and Ocean Engineering Department at Virginia Tech before joining the Engineering Science and Mechanics Department as an assistant professor in September 1985. Professor Gürdal's research interests include: composite structures failure mechanics of composites structural optimization and damage tolerant design. He is a member of the American Institute

Characteristics of both thermoplastic and thermoset composite materials as they pertain to marine vehicle applications are discussed. Comparison of various material selection factors such as strength, damage and moisture resistance, and flammability and toxicity as well as cost and availability of thermoset and thermoplastic composite materials are presented. Methods for testing and reducing the flammability and toxicity are discussed. Many commercially available composite systems are reported to provide favorable characteristics for marine applications. Although there seems to be a need for improved production technology for thermoplastics, they present potential advantages in physical properties over thermoset composites.

关键词： Composite Materials

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NAVAL SHIP design - EVOLUTION OR REVOLUTION

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NAVAL ENGINEERS JOURNAL 1988年第3期100卷 40-52页

作者： TIBBITTS, BF KEANE, RG RIGGINS, RJ Captain Barry Tibbitts USN: was graduated from the U.S. Naval Academy in 1956 and subsequently served as a gunnery division officer in an attack aircraft carrier and as gunnery officer operations officer and chief engineer in two diesel submarines. He attended MIT from 1962–1965 earning a master of science in mechanical engineering and a naval engineers degree. Early assignments as an engineering duty officer included SRF Yokosuka CINCPACFLT staff and SupShip Pascagoula. From 1976 to 1987 he served in a variety of senior ship design assignments: CVV ship design manager director NAVSEC Hull and Ship Design Divisions director NavSea Ship Design Management and Integration Office commander David Taylor Naval Ship R&D Center and director NavSea Ship Design Group. Recently retired but recalled to active duty he is the professor of naval construction and engineering at MIT. He has received seven personal decorations including two Legion of Merit awards. Robert G. Keane Jr.:is currently the deputy director of the NavSea Ship Design Group. He has been employed by NavSea and its predecessor organizations for over twenty years. He is a graduate of The Johns Hopkins University from which he received his B.E.S. degree in mechanical engineering in 1962. He received his M.E. degree in mechanical engineering in 1967 from Stevens Institute of Technology and in 1970 his M.S.E. degree in naval architecture and marine engineering from the University of Michigan. Mr. Keane held increasingly responsible design positions involving ship arrangements hull equipment hull form and hydrodynamic performance before being selected in 1981 for the Senior Executive Service to be director of the Naval Architecture Subgroup. Following an assignment at the David Taylor Research Center as assistant for transition of ship engineering technology he served as director of the Ship Survivability Subgroup until assuming his current position in 1985. He is an active member of ASNE SNAME and ASE. Robert Riggins:received a B.S. in mechanical

Some fairly radical changes to the naval ship design process occurred during the 1970s. The decade of the 80s has also witnessed a steady stream of changes. One of the most significant was the establishment of the Ship Characteristics Improvement Board (SCIB) in the Office of the Chief of Naval Operations (OpNav), and the resulting influence on the dialog between the military requirements decision makers and the Navy's ship designers. Other changes have occurred for which the impacts are less clear. These include establishment of the chief engineer of the Navy (ChEng) position, creation of the Space and Naval Warfare systems Command (SpaWar) and OpNav's “Revolution at Sea” initiative. This paper will describe and discuss these and other changes, and comment on the resultant impact. The authors will attempt to present a global view of the total pattern of changes and try to discern if we are on a path of revolution, or merely normal evolution.

关键词： NAVAL VESSELS

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DETECTING CHANGES IN GROUNDWATER QUALITY AT REGULATED FACILITIES

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GROUND WATER MONITORING AND REMEDIATION 1987年第1期7卷 72-76页

作者： LOFTIS, JC HARRIS, J MONTGOMERY, RH Jim C. Loftis is an associate professor in the Department of Agricultural and ChemicalEngineering at Colorado State University Fort Collins CO 80523. He received his B.S. in agricultural engineering from Oklahoma State University and his M.S. and Ph.D. in agricultural engineering from Colorado State University. His research interests include water quality monitoring water quality hydrology and systems analysis in soil and water problems. His research in monitoring has been funded by the U.S. Environmental Protection Agency the National Science Foundation and the U.S. Geological Survey. He has also worked with IBM Corp. in the design of water quality monitoring and data management systems for the industrial sector. Jane Harris is a graduate research assistant in the Department of Agricultural and Chemical Engineering at Colorado State University. She holds a B.S. in psychology from the University of Tennessee a B.S. in biological engineering from Mississippi State University and an M.S. in agricultural engineering from Louisiana Tech University. She has worked as a bioengineer for Mt U.S. Army Corps of Engineers Waterways Experiment Station in Vicksburg Mississippi and as a hydrologist for S.E. Huey Co. in Monroe Louisiana. Her Ph.D. research topic is trend detection in ground water quality. Robert H. Montgomery is a graduate research assistant in the Department of CivilEngineering at Colorado State University. He received his B. S. in fisheries aria wildlife and his M.S. in resource development from Michigan State University. As a systems analyst with the U.S. Army Corps of Engineers Waterways Experiment Station in Vicksburg Mississippi he worked on detection of trends in lake water quality. His Ph.D. research topic is characterization of uncertainty in ground water quality data.

The Resource Conservation and Recovery Act (PL 94–580) and related federal and state legislation have mandated routine monitoring of ground water quality at regulated facilities. The objective of the required monitoring activities is detection of adverse changes in ground water quality caused by the *** failure to detect pollution and an incorrect determination of pollution can be very expensive. It is crucial, therefore, that monitoring programs be designed and operated to provide statistically sound information. It is equally important that users of ground water quality data understand the nature and limitations of information from *** address the preceding issues, the authors present a general approach to analyzing ground water quality data in light of the stated monitoring objective. The suggested approach accounts for “natural” variation in background water quality through pairing of observations. The limitations of quarterly sampling for detecting small changes in quality over a short time frame are discussed.

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