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亚太海岸工程会议

作者： Suphat Vongvisessomjai Phairot Chatanantavet Mohammad Arif Badsha Khan Water Engineering and Management Program Asian Institute of Technology P.O. Box 4 Klong Luang Pathum Thani 12120 Thailand Professor Water Engineering and Management Program Asian Institute of Technology P.O. Box 4 Klong Luang Pathum Thani 12120 Thailand Research Associate Water Engineering and Management Program Asian Institute of Technology P.O. Box 4 Klong Luang Pathum Thani 12120 Thailand Graduate Student

The Lower Meghna River is the main river in the very important area of the Meghna estuary formed by the combined ocean outfall of the Padma - Meghna river system. This coastal region, which is considerably affected by salinity, is extensive and inhabited by a large population. A number of irrigation and drainage projects, for instance the Chandpur irrigation project and the Meghna Dhonagoda project, are located in the vicinity of this river. The salinity levels always exceed an acceptable level for irrigation purpose during dry season. Studies of flow characteristics and salinity intrusion are, therefore, imperative for development of the irrigation systems. The river is substantially influenced by the tides from the Bay of Bengal when interacting with river flows resulted in a complicated pattern which is simplified to its interaction with individual constituents of tides obtained from harmonic analysis. The analytical solution of tide and river flow interaction from Vongvisessomjai and Rojanakamthorn(1989) is applied in this study with the assumption of consistency of cross - sectional area along the river. The obtained results are found to be quite good. Additionally, the analytical solution of salinity intrusion has been described in decomposing the steady state component of salinity from the unsteady component of tidal convection of salinity. Comparison between computed and observed average salinity along the river has been found in good agreement.

关键词： ANALYTICAL MODEL OF SALINITY INTRUSION IN THE LOWER MEGHNA ESTUARY BANGLADESH

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Multicriteria load management in power systems

Multicriteria load management in power systems

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International Conference on Electric Utility Deregulation and Restructuring and Power Technologies (DRPT)

作者： P.Ya. Ekel L.D.B. Terra M.F.D. Junges A.V. Prakhovnik O.V. Razumovsky Post Graduate Program in Electrical Engineering Pontifical Catholic University of Minas Gerais Belo Horizonte Minas Gerais Brazil Institute for Energy Savings and Energy Management National Technical University Kharkov Polytechnic Institute Kiev Ukraine

The problems of power and energy shortage (natural or associated with the advisability of load management) allocation at different levels of territorial, temporal, and situational hierarchy of consumption control are formulated within the framework of multicriteria optimization models. This permits one to realize a new technology of load management providing consideration and minimization of diverse negative consequences of power and energy shortage allocation and creation of incentive influences for consumers. The solution of multicriteria problems is based on the Bellman-Zadeh approach to decision making in a fuzzy environment. The advantages and capabilities opened by its application are discussed. The results of the paper are realized within the framework of an adaptive interactive decision making system, which can be used in allocating diverse types of resources or their shortages.

关键词： Load management Power system management Resource management Decision making Power generation economics Environmental economics Electricity supply industry energy management Telephony Electronic mail

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Fuzzy logic technology in reactive power control

Fuzzy logic technology in reactive power control

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International Conference on Electric Utility Deregulation and Restructuring and Power Technologies (DRPT)

作者： P.Y. Ekel L.D.B. Terra M.F.D. Junges A.V. Prakhovnik F.J.A. De Oliveira A. Melek R. Kowaltschuk T.Y. Taguti Post Graduate Program in Electrical Engineering Pontifical Catholic University of Minas Gerais Belo Horizonte Minas Gerais Brazil Institute for Energy Savings and Energy Management National Technical University Kharkov Polytechnic Institute Kiev Ukraine Transmission System Operation Superintendence Parana State Energy Company Curitiba Parana Brazil

This paper presents results of research aimed at improving efficiency of coordinated on-line control of reactive power on the basis of developing models, methods, and a control system, integrating traditional numerical techniques with fuzzy logic technology. An approach associated with experimental design is considered to construct diverse types of sensitivity indices, which serve as the basis for multi-attribute evaluating efficiency of control actions and, therefore, for forming rules included in a knowledge base. Procedures related to classifying power system states are presented. Questions of the construction and tuning of linguistic variables as well as rational implementation of fuzzy logic procedures are discussed.

关键词： Fuzzy logic Reactive power control Power system modeling Fuzzy control Fuzzy set theory Power system control Power systems Control system synthesis Design for experiments Expert systems

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Environmental compliance: Requirements and technology opportunities for future ships

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NAVAL ENGINEERS JOURNAL 1997年第3期109卷 349-369页

作者： Nickens, AD Pizzino, JF Crane, CH Anthony D. Nickens:is the research and development progrma a manager for the Navy's Environmental Protection Program at the Naval Sea Systems Command's Ship Research Development and Standards Group (Sea 03R).He is responsible for overseeing directing and funding the design and development of shipboard systems and precedures to assure compliance with maritime environmental laws and regulations He holds an M.B.A. degree from the Florida Institute of Technology an M.S. degree in chemical engineering from the University of Florida and a B.S. degree i chemical engineering magna cum laude from the North Carolina State University. In addition he successufully completed the twenty-week Program Management Course at the Defense Systems management College in Fort Belvoir Virginia and the Executive Program at the University of Virginia Darden Graduate School of Business. He is also an engineering duty officer in the Navy reserves and a previous author and frequent contributor to Naval Engineers Journal. Josepe F. Pizzino:is a Naval Surface Warfare Center Carderock Division Employee working at the Naval Sea Systems Command's Ship Research Development and Standards Group (Sea 03R). He is a research and development program manager for the Navy's Environment Protection Program responsible for overseeing directing and funding the design and development of shipboard systems and procedures to assure combliance with maritime environment laws and regulations. Prior to his present assignment he was project engineer for the development os shipboard and life-boat reverse osmosis desalination systems both of which are persently being unstalled aboard Navy ships. He holds a B.S. in chemical engineering from the University of Marland and an M.S. degree in chimical engineering from The Catholic Uhiversity of America. Chirstopher H. Crane:is a senior scientist at Geo-Centrs Inc. where he has provided technical program and dcumentation support for Navy headquarters shipboard environmental programs since 1989. Previouss grover

Navy ships must be able to operate anywhere in the world and visit any port unencumbered by environmental restrictions. The Office of the Chief of Naval Operations (OCNO) has formulated a vision for the environmentally sound ship of the 21st century, which will ensure compliance with environmental requirements applicable to Navy ships, while maintaining fleet effectiveness and readiness. Navy ships generate a variety of solid and liquid wastes and atmospheric emissions. Ships have limited capabilities for holding wastes for offload to shore. Working closely with the OCNO, the Naval Sea Systems Command (NavSea) is developing systems, equipment, and procedures to process and manage ship wastes in an environmentally responsible manner. Several pieces of shipboard equipment have been successfully developed to process solid and liquid waste, hazardous materials and ozone-depleting substances (ODSs). The technologies and practices being developed under this program will: ensure compliance with environmental laws and regulations, significantly reduce the logistic burdens and costs associated with shoreside offload and disposal of ship wastes, implement Navy environmental and occupational safety and health policies, enhance the quality of life aboard ship, and continue the Navy's leadership role in protecting the marine environment.

关键词： Naval vessels

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Reliability analysis of transverse stability of surface ships

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NAVAL ENGINEERS JOURNAL 1997年第3期109卷 129-140页

作者： Atua, K Ayyub, BM Khaled l. Atua:is a graduate student at the Reliability Engi-neering Program at the University of Maryland at College Park. He completed his B.S. degree in naval architecture and marine engineering in 1988 and completed his M.S. degree in naval architecture and marine engineering in 1992 at Alexandtia University. He is also a visiting scholar in the Civil Engineering Department at the University ofMaryland at Colkge Park. He is conducting research with Dc Bilal M. Ayyub in the area of develupment of reliability-based design of ship structures and systems. He is a member ofASNE and SNAME. He has authored or coauthored several papers and reports. Bilal M. Ayyub: Ph.D. RE. is aprofssor of civil engineer-ing at the University of Maryland at College Park. He is also a researcher and consultant in the areas of structural engineering inspection methods and practices reliability and risk analysis. Dc Ayyub completed his B.S. degree in civil engineering in 1980 and completed both his M.S. (1981) and Ph.D. (1983) degrees in civil engineering at the Georgia Institute of Echnol-OD. Dc Ayyub has an extensive background in uncertainty modeling and analysis risk-based analysis and design simula-ion and marine structural reliability. He is engaged in research work involving structural reliability marine structures uncer-tainty modeling and analysis and mathematical modeling using the theories of probability statistics and fuzzy sets. He has completed several research projects that were funded by the National Science Foundation the U S. Coast Guard the U.S. Navy the U.S. Department of Defense the U.S. Army crops of Engineers the Maryland State Highway Administration the American Society ofMechanica1 Engineers and several engi-neering companies. Dc Ayyub served the engineering communio in various capacities through societies that include ASNE ASCE ASME SNAME IEEE-CS and NMIPS. He is a member ofthe ASME Research Committee of Risk Ethnology and the ASME Committee on Human Factors. Currently he is the chai

An introduction to a rational development of transverse stability criteria for surface ships is presented in this paper. The development is based on a probabilistic analysis of the uncertainties associated with the design parameters involved in determining the transverse stability. Reliability methods are used for assessing and determining transverse stability of ships. These reliability methods address the uncertainties associated with the basic design variables that are involved in stability assessment and design. The sources of uncertainty in stability variables are presented, uncertainties associated with these basic random variables are summarized, different reliability assessment methods are described, a case study that shows the computation procedure using some of these methods is discussed for illustration purposes, and finally, conclusions and recommendations for further work in this area are presented.

关键词： Naval vessels

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Regarding virtual growth

Regarding virtual growth

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International Conference on engineering and Technology management (IEMC)

作者： D.J. Wells S.R. Willett Director Engineering & Management Program Clarkson University Potsdam NY USA Engineering & Management Program Advisor Graduate Student Clarkson University Potsdam NY USA

Several factors influence business policy, performance, and strategy: (1) organizations are flatter, (2) margins are reduced, (3) employees are more expensive to replace, and (4) competition is increased with the globalization of markets. The result is that firms must be effective and efficient in their operations and decision processes. To do this they are best served by optimizing, to every extent possible, the abilities of their employees to contribute, and their organization's ability to compete successfully.

关键词： engineering management Productivity Remuneration Differential equations Virtual enterprises Strategic planning

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A COMPUTER-MODEL FOR DAMAGE TOLERANCE ANALYSIS

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NAVAL ENGINEERS JOURNAL 1988年第5期100卷 59-68页

作者： FAIRHEAD, DL COHEN, SL Steven L. Cohen:heads the Survivability and Damage Control Office at the David Taylor Research Center. His career has addressed a wide range of technical and management responsibilities in the areas of HM&E systems design magnetic signatures system safety of surface ships and submarines shipboard energy conservation RDT&E (future fleet) life cycle costing survivability damage control CBR defense and management information systems. He has participated in all phases of the ship design process from conceptual design through ship construction operational evaluation and overhaul/modernization. Mr. Cohen is a graduate of Drexel University where he majored in electrical engineering and has more recently taken courses in the fields of systems engineering program management costing and microcomputer-based information and decision support systems.

A computer model is being developed by the David Taylor Research Center (DTRC) to analyze the tolerance of surface ship combat systems to combat-induced and self-inflicted damage. The work is being done in support of the Navy's hull, mechanical and electrical design effort to improve the survivability of surface ship combat systems. The DDG-51 Detailed Design Specifications (Section 072f) and the General Specifications for Ships of the U.S. Navy (1986 Section 072e) both require that damage tolerance analyses be performed. A damage tolerance analysis shows the effect of damage on vital auxiliary and electrical systems and relates these damage effects to the capability of the ship to continue performing its combat mission at a prescribed level. Designated the Computer Aided Design of Survivable Distributed Systems (CADSDiS) model, DTRC's deterministic analytical tool consists of portable software to be used by personnel at the activity responsible for the ship design. The model's graphics electrical module is now operating on Digital Equipment Corporation VAX computers at several Navy and commercial activities. Because CADSDiS is highly interactive, it becomes an integral part of the design cycle; this is its major benefit. Thus, damage tolerance analysis information is available to personnel designing the ship within hours or days rather than weeks or months. This computer model will help ensure that the survivability principles of separation and redundancy are incorporated into ship design and are realized in the ship as built.

关键词： Warships

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RACER - A DESIGN FOR MAINTAINABILITY

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NAVAL ENGINEERS JOURNAL 1985年第5期97卷 139-146页

作者： DONOVAN, MR MATTSON, WS Michael R. Donovanis a 1974 graduate of the United States Naval Academy where he received his undergraduate degree in naval architecture. In 1975 he received a master of science degree in naval architecture and marine engineering from the Massachusetts Institute of Technology. After completing the Navy's nuclear power training program he served as machinery division officer in USSBainbridge (CGN-25) and chemistry and radiological controls assistant in USSLong Beach (CGN-9). He successfully completed the Navy's surface warfare officer qualification and passed the nuclear engineer's examination administered by Naval Reactors. He was then assigned to the Ship Design and Engineering Directorate (SEA-05) Naval Sea Systems Command as head systems engineer on the DDG-51 ship design project where he received the Navy Commendation Medal for outstanding performance. He is currently with Solar Turbines Incorporated as manager ship integration and integrated logistic support for the Rankine cycle energy recovery (RACER) system. Mr. Donovan has lectured at Virginia Polytechnic Institute teaching marine engineering and has given presentations on ship design at various symposiums and section meetings for both ASNE and SNAME. He has been a member of ASNE and SNAME since 1972 and is registered as a professional engineer in California and Virginia. Wayne S. Mattsonreceived his B.S. degree in mechanical engineering from Western New England College in 1972. Following graduation he attended Naval Officer Candidate School and was subsequently assigned as a project officer to COMOPTEVFOR where he was responsible for technical and operational test plans their execution and final equipment appraisal. Following a tour as engineering officer aboard the USSNespelen (AOG-55) he was assigned as commissioning MPA aboard the USSElliot (DD-967) the fifthSpruanceclass destroyer. For the past six years he has been employed by Solar Turbines Incorporated in program management within the advanced development department. He is currently

There is a great deal of emphasis currently in the Navy on the issues of reliability and maintainability. If a system or component is out of commission, it obviously cannot perform its mission. Thus, systems and components must be reliable, with low failure rates, and maintainable, with short repair times when the system does become inoperable. To be effective, these attributes must be incorporated into new ship systems early in the design stage. The Rankine cycle energy recovery (RACER) system is a heat recovery steam cycle designed to recover energy from the exhaust of an LM2500 gas turbine for augmentation of a ship's propulsion system. The RACER system provides several advantages to a gas turbine powered ship, one of which is improved fuel efficiency for significant annual fuel savings. This saving does not come free, however, since, in general, any additional system installed in the ship will have some maintenance requirements. In keeping with the Navy's current emphasis, a key philosophy in the design of the RACER system has been to minimize this maintenance burden. After a brief description of the RACER system and its design philosophy, the techniques being used during the design phase to minimize the maintenance burden on the fleet are presented. Trade-off studies concerning acquisition versus life-cycle costs, including fuel and maintenance costs, are discussed. Innovations incorporated into this state-of-the-art system are reviewed with an emphasis on design for affordability.

关键词： COGENERATION PLANTS

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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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SHIP energy-CONSERVATION ASSIST TEAM (SECAT)

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NAVAL ENGINEERS JOURNAL 1984年第2期96卷 47-58页

作者： DANGEL, R BRICE, AE The Authors A. Edward Brice was born and educated in Scotland where he graduated from the James Watt Memorial College and Paisley Technical College. His earliest marine engineering experience was obtained at Scotts's Shipbuilding and Engineering Company Limited from 1952 to 1959 where he was involved in the production and design of steam and diesel machinery plants for both Naval and commercial ships. During a five year stay in Canada Mr. Brice gained diversified experience in industries other than marine such as petrochemical plants and steel mills. He moved to the U.S. in 1964 where he was the design supervisor in charge of marine engineering at NASSCO covering new construction for American President Lines AFS type ships for the U.S. Navy Project Mohole Car Ferries for the State of Washington and 17 LST's for the U.S. Navy. During the contract definition phase of the DD-963 Mr. Brice authored several portions of the technical proposal while employed by Litton industries. He was also responsible for the system and detail design including the technical management of sub-contracts for the steam propulsion plant for the LHA 1 Class ships. Mr. Brice has been active in the Washington area for the last ten years performing marine engineering projects for the U.S. Navy. His principal interest since 1974 has been in shipboard energy conservation. He assisted in the development of the NavySTMSYS program and later in the operational verification aboard FF-1074. Mr. Brice has conducted four SECA T visits aboard ships with 1200 PSI steam plants and has recently completed an at-sea visit aboard on AOR with a 600 PSI steam plant. Richard Dangel was bom in New York City. He received his Bachelor's degree from the Sloan School of Industrial Management of the Massachusetts Institute of Technology in 1955. He has also completed graduate work for a Masters in Engineering Administration at George Washington University. Since graduation he has spent 11 years in private industry with companies in the DOD engineering research

The Ship energy Conservation Assist Team (SECAT) program was initiated in Fiscal Year (FY) 82 by the Naval Sea Systems Command (NAVSEA) to demonstrate and introduce individual Ship Commands to known energy conserving techniques without adding equipment complexity or additional maintenance burden. The principal objective is to provide each ship with an energy consumption, coupled with recommended energy conservation strategies. The technique involves both in-port and underway monitoring and introduction of energy efficient machinery plant alignments, fuel consumption curve generation, and most efficient speed curves. The program has completed visits on six combatants and enjoys the support of both the Commander, Naval Surface Forces, U.S. Atlantic Fleet (COMNAVSURFLANT) and the Commander-in-Chief, U.S. Atlantic Fleet (CINCLANT). Plans are to perform SECAT on additional DDG 2 and FF 1052/1078 Class ships and initiate SECAT on additional ship types in FY 83.

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