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AUTOMATIC INPUT OF LOGIC dIAGrAMS BY rECOGNIZING LOOP-SYMBOLS ANd rECTILINEAr CONNECTIONS

International Journal of Pattern recognition and Artificial Intelligence 1994年第5期8卷 1113-1129页

作者： SOO HYUNG KIM JIN HYUNG KIM S/W Group Computer and Information R&D Center Samsung Electronics Co. Ltd. P.O. Box 105 Suwon Kyungki-Do 449–900 Republic of Korea Department of Computer Science and Center for AI Research Korea Advanced Institute of Science and Technology 373–1 Kusung-Dong Yusung-Gu Taejon 305–701 Republic of Korea

An automatic system that reads an image of a logic diagram, digitized by a document scanner, and generates a description of the diagram in terms of logic symbols and their interconnections is proposed. The digitized image is converted into a set of line segments by way of a sequence of picture processing operations, Then symbols and connections are recognized by identifying loops and rectilinear polylines. Graphical description of a set of symbol models is provided as prior knowledge about input diagrams. Experiments show that the system can recognize more than 96% of logic symbols and connections and that an A4 size diagram (210×297 mm ) of average complexity can be processed within 10 seconds on a workstation.

关键词： Text/graphics separation single-pixel wide line structure loop-symbol rectilinear connection symbol model

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BIOPHArMACEUTICAL r-ANd-d SUCCESS rATES ANd development TIMES

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BIO-technology 1994年第7期12卷 674-677页

作者： STrUCK, MM Mark-M. Struck is at the Swiss Serum and Vaccine Institute Rehhagstrasse 79 CH-3018 Bern Switzerland.REFERENCES Pharma Projects I. Hutton (ed.) PJB Publications London.Bienz-Tadmor B. Dicerbo P.A. Tadmor G. and Lasagna L. 1992. Biopharmaceuticals and conventional drugs: Clinical success rates. Bio/Technology 10: 521-525.|Article|PubMed|ChemPort|Halliday R.G. Walker S.R. and Lumley C.E. 1992. R&D philosophy and management in the world's leading pharmaceutical companies. J. Pharm. Med. 2: 139-154.Shaffer M. 1992. Drugs approved in 1991. FDA Talk Paper (Jan. 15 1992) Food and Drug Administration U. S. Department of Health and Human Services.Miller H.I. 1992. Drug approvals. Nature 356: 189.|Article|PubMed|ISI|ChemPort|Scrip. 1993. EC concertation progress reviewed. Scrip 1850: 7.Bienz-Tadmor B. 1993. Biopharmaceuticals go to market: Patterns of worldwide development. Bio/Technology 11: 168-172.|PubMed|ChemPort|Reis-Arndt E. 1993. Neue pharmazeutische Wirkstoffe 1961-1990. Pharm. Ind. 55: 14-21.

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HYBrId HYdrOFOIL technology APPLICATIONS

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NAVAL ENGINEErS JOUrNAL 1994年第1期106卷 123-136页

作者： MEYEr, Jr The Author:is manager of hydrofoil technology in the Hydrofoil Group of the Systems Department of the David Taylor Research Center. He holds bachelors and masters degrees in aeronautical engineering from Rensselaer Polytechnic Institute and has done additional graduate work at the Massachusetts Institute of Technology in the same field. Since joining the David Taylor Naval Ship R&D Center in 1971 he has been associated with advanced naval vehicles. Meyer has authored a number of DTRC reports AIAA and ASNE papers on the subject of hydrofoils and hybrid marine vehicles he holds several patents in this technical area. Prior to his current employment at DTRC Meyer held several research and development long-range planning and engineering management positions with Boeing-Vertol Trans-Sonics Inc. Air Force Cambridge Research Center and the Aero-Elastic Laboratory at MIT. Meyer has served on the AIAA Marine Systems and Technologies Committee the High Speed Vehicle Committee of the American Towing Tank Conference and now as president of the International Hydrofoil Society. He is a member of the American Society of Naval Engineers American Institute of Aeronautics and Astronautics and the Society of Sigma Xi.

The purpose of this paper is to provide a review of hybrid hydrofoil vehicle technology and feasibility designs, both military and commercial, that have been explored during the last several decades. A hybrid hydrofoil consists of a conventional monohull form with the addition of a long, slender, single strut and lower body added to its keel. The lower body buoyant lift is augmented by the dynamic lift from a fully-submerged foil system. Foil dynamic lift comes into play at speeds of about 12 to 15 knots and above, at which time the upper hull is lifted from the water surface leaving only the small waterplane of the single strut at the interface. The foil automatic control system maintains predetermined flying height and provides a stable platform in waves. The foil surfaces are sufficiently powerful to counter roll, pitch and heave motions that would be imparted to a conventional monohull in waves. Propulsion of a hybrid hydrofoil is provided by one or more prime movers in the upper hull, either driving through a mechanical Z-drive, or an electric transmission system, to one or more propellers on the stern of the lower hull. An alternate arrangement is to place the entire propulsion system in the lower hull, thereby eliminating a Z-drive requirement. The hybrid hydrofoil designs to be described will include USCG patrol craft, U.S. Navy long-range missile patrol craft, multi-mission deployable vehicle, multi-mission support vehicle, and small combatant, along with several commercial versions of the hybrid hydrofoil concept.

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ArCHITECTUrE ANd NETWOrKING ISSUES IN SATELLITE SYSTEMS FOr PErSONAL COMMUNICATIONS

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INTErNATIONAL JOUrNAL OF SATELLITE COMMUNICATIONS 1994年第1期12卷 33-44页

作者： ANANASSO, F CArOSI, M Received the Electronics and Electrical Communications Degree from the University of Rome in 1973 after which he joined Selenia S.p.A (Rome) as a microwave designer in the Development Laboratory. He was involved in several military and civilian projects concerning microwave subsystems for Radar Avionics and Satellite Communications equipment. In 1981 he joined Telespazio S.p.A. (Rome) as Section Chief in the Space and Advanced Programs Division with responsibilities related to satellite payload and digital transmission channel design. In 1987 he was appointed Associate Professor of Digital Signal Processing at the University of Rome Tor Vergata Electronics Engineering Department. In 1990 he again joined Telespazio where he is now Director of the Advanced Studies and Experimentations Division. He has performed a number of studies for National and International Organizations including ESA EUTELSAT INMARSAT and INTELSAT is author of a Radio Systems book a Chapter (‘Digital transmission channel’) of the ‘Satellite Communication System Design’ book by Plenum Publishing (1993) and over 80 technical papers on communication systems and technology. Received the Electronics and Electrical Communications Degree from the University ‘La Sapienza’ of Rome Italy in 1987. From 1987 to 1990 he worked as a Research Engineer in the INFOCOM department of the University ‘La Sapienza’ of Rome carrying out research on design and performance evaluation of multiple access protocols particularly in the metropolitan area network and in the satellite fields. Since 1990 he has been working in the System Studies and Payload group of Telespazio S.p.A. Rome Italy. He is currently involved in projects sponsored by the European Space Agency and by INMARSAT for communications systems via satellite for mobiles both at study and R&D level. Mr Carosi is a member of the IEEE Communication Society.

The paper expands on some specific aspects of personal communications via satellite, often-although not necessarily-envisaging extensive use of 'small' satellites, using orbits not necessarily coinciding with the geostationary one (36,000 km), but rather at 1000-11,000 km altitude. One key point to be borne in mind is the issue of internetworking between satellite and terrestrial systems. Network integration should be carefully implemented in order to comply with ITU future public land mobile telecommunication systems (FPLMTS) requirements, also accepted in the European Telecommunication Standards Institute (ETSI) universal mobile telecommunication systems (UMTS). In addition to some insight into the technology of small satellites and associated orbits, architectures and networking aspects of most relevant systems providing personal communication services (PCS) are addressed in some detail, and potential applications highlighted. Frequency spectrum allocation is addressed in the light of the 1992 World Administrative radio Conference (WArC-92), taking into account also multiple access problems and regulatory issues such as Federal Communications Commission (FCC) licensing and spectrum sharing debates. Some remarks on critical technologies and cost conclude the paper.

关键词： PErSONAL COMMUNICATIONS SMALL SATELLITES NETWOrKING FrEQUENCY SPECTrUM

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PErFOrMANCE OF A PrIOrITIZEd ON-BOArd BASEBANd SWITCH FOr A MULTISErVICE MULTIBEAM SATELLITE

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INTErNATIONAL JOUrNAL OF SATELLITE COMMUNICATIONS 1994年第3期12卷 283-297页

作者： BOHM, S ELHAKEEM, AK HACHICHA, M Department of Electrical and Computer Engineering Concordia University 1455 De Maisonneuve Blvd. West Montreal H3A 1M8 Canada Was born in Montreal Canada on 14 September 1966. He received the B. Eng. degree in electrical engineering from Concordia University Montreal Canada in 1989. He is at present completing the M.A.Sc. degree in electrical engineering at Concordia University. (S'75–S'79–M'79–SM'86) received the Ph.D. degree from Southern Methodist University Dallas TX in 1979. He spent the next two years working as a Visiting Professor in Egypt after which he moved to Ottawa Canada in 1982. He assumed teaching and research positions in Carleton and Manitoba Univerities and later moved to Concordia University Montreal Canada in 1983 where he is now a Professor in the Electrical and Computer Engineering Department. He has published numerous papers in IEEE and international journals in the areas of spread spectrum and networking. He is a well-known expert in these areas and serves as a consultant to many companies. His current research interests include wide-band metropolitan networks switching architectures and performance of on-board multibeam satellites acquisitionless CDMA networks code distribution and orthogonalization of CDMA signals responsive congestion control for ATM-based networks ARQ techniques and investigation of the novel SUGAR CDMA systems in fading channels. Dr. Elhakeem is a Senior Member of the Canadian Electrical Engineering Society and Armed Forces Association. He has chaired numerous technical sessions in IEEE Conferences was the Technical Program Chairman for IEEE Montech 1986 Montreal Canada. Dr. Elhakeem is the key guest editor of theIEEE Journal of Selected Areas in Communicationsfor the May June issues 1993 covering CDMA networks. Advanced Technology & Networks VISTAR Telecommunications Inc. Ottawa Ontario K1G 3J4 Canada An Associate Director of Advanced Technology & Networks Group VISTAR Telecommunications Inc. Ottawa Canada. He is also an Adjunct Pr

In this paper, we study the performance of a prioritized on-board baseband switch in conjunction with a multibeam satellite handling integrated services. The services considered for the analysis include voice, video, file transfer and interactive data. The prioritized switch uses both input and output buffering, switch speed-up as well as a two-phase head-of-line resolution algorithm, in order to reduce the buffer loss while maintaining acceptable user delays. The minimum required buffer capacity and switch speed-up for each service in a prioritized environment are found under uniform traffic conditions. It is shown that under uniform traffic conditions, only minimal buffering and switch speed-up are needed even for the lowest priority users. The performance dependence on the switch size is also substantially reduced with head of line resolution and buffering even in a prioritized environment.

关键词： SWITCH ON-BOArd BASEBANd MULTIBEAM PrIOrITIZEd HEAd-OF-LINE UNIFOrM LOAd SPEEd-UP

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MAKING PIPING SYSTEMS FIrE-SAFE - SIMPLE SOLUTIONS FOr PrEVENTING A dISASTEr

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NAVAL ENGINEErS JOUrNAL 1994年第3期106卷 285-295页

作者： BHASIN, V NILSEN, L GUPTA, K CONrOY, d Vinod Bhasin P.E.:is a fellow engineer with the Westinghouse Electric Corporation machinery technology division Pittsburgh Pa. He has more than 19 years of experience in the supervision design application and testing of valves and actuators and has taught courses in solids mechanics for 10 years at Illinois Institute of Technology Chicago Il. Mr. Bhasin has written articles for the valve industry where he has been active in standards societies. He holds BS and MS degrees in mechanical engineering and an MS in industrial engineering. Mr. Bhasin is a member of the American Society of Mechanical Engineers (ASME) and the American Society for Testing and Materials (ASTM). He is co-chairman of the shipbuilding piping component subcommittee ASTM F25.13 and is also chairing three other task groups under ASTM F25. Lloyd Nilsen P.E.:is the piping components branch head for NavSea. His career with NavSea includes 33 years of ship design construction and repair experience. He has held various positions in the power piping design division human factors manning and controls integration branch and submarine machinery systems branch. He has a BS degree in marine engineering from N.Y. State Maritime. Mr. Nilsen is also a member of the NavSea Association of Scientists and Engineers and a registered licensed professional engineer in Virginia and Washington D.C. Karan Gupta P.E.:is a senior engineer with the Westinghouse Electric Corporation Machinery Technology Division Pittsburgh Pa. Prior to joining Westinghouse he was employed by Elliott Company Jeannette Pa. for 12 years as a metallurgical engineer. He has more than 25 years experience in metallurgical engineering including material selection and brazing and welding of piping pressure vessels and turbines. Mr. Gupta has BS and MS degrees in metallurgical engineering. He is a member of the American Welding Society (AWS) and is active in AWS filler metal subcommittee A5A. He is also a member of ASM International. Dennis Conroy: is a chemical engineer

Loss of life and property losses totaling tens of billions of dollars have piping engineers scrambling to specify ''fire-safe'' components in fire-prone locations: on board ships, and in power plants, refineries, and other perilous applications. Fire-safe valves, the first line of defense in containing a fire, were introduced some 25 years ago, with fire-safe actuators following soon afterwards. Little attention has been given, however, to designing and selecting the other piping components such as flanges, gaskets, bolting, and fittings to ensure their integrity in a fire. Just like in an electric circuit where, if a single component in series fails, the flow of electricity stops;likewise, the failure of a single piping component could result in a fire of catastrophic proportions. This paper discusses the availability of critical fire-safe components for Navy shipboard piping systems and provides some simple solutions which, if implemented, could prevent such a disaster. discussion is provided on how a fire starts and how it reaches catastrophic proportions, the definitions of survivability and fire-safe components, materials of construction, component design, fire-safe valves and actuators, gaskets, pipe flanges, flange bolting, pipe fittings and unions, brazing and welding, insulation, composite piping materials, and other related subjects. details are also provided on 78 fires that have occurred on Navy surface ships in the last ten years and their causes.

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HIGH-ENErGY dENSITY LITHIUM rECHArGEABLE BATTErIES FOr UNdErWATEr VEHICLE PrOPULSION

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NAVAL ENGINEErS JOUrNAL 1993年第3期105卷 181-186页

作者： SMITH, PH CHUA, dL FLEISCHMANN, CW JAMES, Sd Patricia H. Smith:is leader of the Battery Research and Development Group in the Electrochemistry Branch of the Naval Surface Warfare Center Dahlgren Division White Oak Detachment She has 12 years experience in exploring and extending electrochemical technology in order to bring safe high energy lithium batteries into widespread naval use. Dr. Smith manages the High Energy Battery Project sponsored by the Office of Naval Research. A major thrust of this Project is developing power sources to propel naval underwater vehicles. Dr. Smith has authored numerous papers on lithium batteries and is presently editor-in-chief of the High Energy Battery Newsletter. She obtained her Ph.D. in inorganic chemistry at the University of Maryland in 1981. David L. Chua:is manager of lithium battery R&D at Alliant Techsystems Inc.-Power Sources Center (formerly Honeywell) Horsham Penn. He is responsible for the research and development of both primary and rechargeable lithium technologies. He earned his M.S. in metallurgical engineering at the University of Arizona in 1969 and a Ph.D. in materials engineering at Rensselaer Polytechnic Institute in 1973. Dr. Chua has over 15 years experience in lithium electrochemical research received 5 patents and authored numerous papers on lithium battery technology. Charles W. Fleischmann: principal chemist Advanced Technology & Research Corp. is consultant to the Battery R&D Group Electrochemistry Branch Naval Surface Warfare Center Dahlgren Division White Oak Detachment. During the past 35 years as a scientist and technical manager mainly in the field of electrochemical energy conversion he has directed R&D departments at Exide Corp. Honeywell Corp. C&D Batteries (Allied Corp.) and was on the technical staffs of Mallory Battery Co. NL Industries Leesona Moos Labs and Lowry Air Force Base Technical Training Center. Schooled in the City of New York he holds a B.S. from Queens College and a Ph.D. from Polytechnic University. Publications and patents: over 35 Stanley D. Jam

The rechargeable lithium/cobalt oxide electrochemistry is examined for its use in powering underwater vehicles. It has been successfullv developed in 30 amp hour capacity cells. A comparative studv with the silver oxide/zinc technology, most frequently used for this application, revealed lithium's superior performance. Lithium/cobalt oxide gave more charge-discharge cycles with 40-50% higher energy density. Lithium's advantage was especiallv marked at -2-degrees-C, where it cycled four times longer than silver cells. Projections indicate that, at the 600 amp hour cell size, the battery will have an energy density of 120 watt hours per pound resulting in a more durable and cost effective power source for naval vehicles than currentlv possible.

关键词： (1) lithium rechargeable battery (2) underwater vehicle power supply

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PULVErIZEd COAL COMBUSTION IN O-2 CO2 MIXTUrES ON A POWEr-PLANT FOr CO2 rECOVErY

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ENErGY CONVErSION ANd MANAGEMENT 1992年第5-8期33卷 379-386页

作者： NAKAYAMA, S NOGUCHI, Y KIGA, T MIYAMAE, S MAEdA, U KAWAI, M TANAKA, T KOYATA, K MAKINO, H R&D Department Electric Power Development Co. Ltd. Ginza 6-15-1 Chuou-ku Tokyo Japan Boilor R&D Department Ishikawajima-Harima Heavy Industries Co. Ltd. Toyosu 3-2-16 Koto-ku Tokyo Japan Technology Division Japan Oxygen Co. Ltd. Tsukagoshi 4-320 Kawasaki Japan Central Research Institute of Electric Power Industry Yokosuka Japan Nagasaka 2-6-1 Yokosuka Kanagawa Japan

Pulverized coal combustion in an oxygen-enriched atmosphere with CO2/O2 mixtures is expected to be effective for improving combustion efficiency and for CO2 recovery from flue gas without the process of concentration. Feasibility studies were in progress for evaluating the air separation/flue gas recycling process with CO2 recovery including oxygen generator and flue gas treatment. The findings of studies so far conducted indicate that this process is more economical than other CO2 recovery techniques and is expected to offer, among others, satisfactory burnout efficiency through the use of an oxygen-enriched atmosphere. From now on, expanded research activities will be carried on to pave the way for commercialization of the proposed process.

关键词： CO2 rECOVErY O-2/CO2 COMBUSTION PCF POWEr PLANT OXYGEN-rICH COMBUSTION

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PHOTOVOLTAIC PrOPErTIES OF SINTErEd CdS/CdTE SOLAr-CELLS dOPEd WITH CU (JOUrNAL OF THE ELECTrOCHEM SOCIETY VOL 139, PG 3351, 1992)

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JOUrNAL OF THE ELECTrOCHEMICAL SOCIETY 1992年第12期139卷 3544-3544页

作者： PArK, JW Department of Electronic Materials Engineering Korea Advanced Institute of Science and Technology Daejeon 305‐701 Korea Samsung Electronics Semiconductor R&D Center Kihung Korea

All polycrystalline CdS/CdTe solar cells doped with Cu have been prepared by a screen printing and sintering method. Cell parameters of the sintered CdS/CdTe solar cells have been investigated in an attempt to find out the optimum doping conditions and concentrations of Cu by adding various amounts of CuCl2 either into CdTe layer or into back contact carbon layer. Cell parameters of the sintered CdS/CdTe solar cells which contained various amounts of CuCl2 in the CdTe layers before sintering stay at about the same values as the amount of CuCl2 increases up to 25 ppm, and then decreases sharply as the amount of CuCl2 further increases. The Cu added in the CdTe layer diffuses into the CdS layer during the sintering of the CdS-CdTe composite at 625-degrees-C to densify the CdTe layer and causes the decrease in the optical transmission of CdS resulting in the degradation of the cell performance. In case the Cu dopant was dispersed in the back carbon paint and was followed by annealing, all cell parameters are improved significantly compared with those fabricated by adding CuCl2 in the CdTe layer before sintering. A sintered CdS/CdTe solar cell which contained 2 5 ppm CuCl, in the carbon paste and was annealed at 350-degrees-C for 10 min shows the highest efficiency. The efficiency of this cell is 12.4% under solar irradiation with an intensity of 80.4 mW/cm2.

关键词： Semiconducting cadmium compounds

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Characterizations and electric conductivities of phosphorous oxychloride-treated polymers containing methyl vinyl ketone

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Journal of Macromolecular Science, Part A 1992年第4-5期29卷 381-390页

作者： Cho, Won Je Ha, Chang Sik Kim, Young Min Choi, Sam Kwon Department of Polymer Science and Engineering Pusan National University Pusan 609-735 South Korea R&D Center Petrochemicals and Polymers Lucky Ltd. DaeJeoD 305-343 United States Korea Advanced Institute of Science and Technology Seoul 135-650 Chong Ryang P.O. Box 150 United States

Studies have been made on the characterizations and conductivities of poly(methyl vinyl ketone) (PMVK) and its copolymer with methyl methacrylate (poly(MVK-co-MMA)) after being reacted with phosphorus oxychloride (POCl3). The POCl3-treated polymers containing methyl vinyl ketone (MVK) were characterized by Ir and UV spectroscopies to prove the structure of conjugated double bonds. The conductivities of all the MVK-containing polymers treated with POCl3 were very low,***-I7 Wcm, in a vacuum regardless of the treatment time. The conductivities of the polymers when doped with iodine are in the range of the order of to S/cm. It was found that the conductivity of the POC1,-treated copolymer is slightly lower than that of PMVK. Copyright © 1992 by Marcel dekker, Inc.

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