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INFLUENCE OF STACKING-SEQUENCE ON THE TrANSVErSE MATrIX CrACKING IN CONTINUOUS FIBEr CrOSSPLY LAMINATES

JOUrNAL OF COMPOSITE MATErIALS 1995年第10期29卷 1337-1358页

作者： XU, LY R&D Division Si-Da Technology Development Centre Jinan Branch 113 JieFang Lu Jinan Shandong Province 250013 PR. China

The influence of stacking sequence to the transverse matrix crack was studied experimentally and analytically. Five crossply laminates of Gr/BMI and GL/BMI composites were tested. Stacking sequence was found to have a significant effect on the matrix crack growth in composite laminates, it is behaved by the thickness effect to the cracked 90 degrees plies. If the total volumes of the 0 degrees and 90 degrees plies are identical but the stacking sequences are designed to be different, the matrix crack growth processes are quite different. The 90 degrees layer with smaller thickness has the higher cracking loading, matrix crack growth rate and final saturation crack density. Although stacking sequence affects the damage material stare of the matrix crack, a final damage mechanics state may exist in the matrix crack growth for the laminates with the same total volumes of the 0 degrees and 90 degrees plies but with different stacking sequences, this damage state is characterized by the final residual laminate stiffness and seems to be independent of the laminate stacking sequence. This phenomenon can be accounted by a modified shear-lag model. Further study shows that the stiffness degradation of the cracked 90 degrees plies has a low boundary which is independent of the laminate layup and material.

关键词： MATrIX CrACKING STACKING SEQUENCE STIFFNESS rEdUCTION dAMAGE STATE

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Abstracts of papers presented at the 14th conference of the Weed Science Society of Israel Abstracts of papers presented at the international conference on controlled atmosphere and fumigation (CAF) in stored products Abstracts of papers presented at the joint international conference of FAOPMA — CEPA on pest control in the 21st century Abstracts of papers presented at the 2nd international Agro-Ecology Symposium on integrated pest management: from the drawing board to the market

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Phytoparasitica 1996年第3期24卷 199-265页

作者： E. Yogev M. Berson Y. Benyamini Y. Sheinboim T. Lev-ran A. Bahat Y. Barkai Y. Gatti M. Zaidan O. Barazani Y. Boshvize S. Graph U. Luchinsky T. Blumenfeld Y. Kleifeld G. Herzlinger H. Bucsbaum S. Golan T. Chilf r. Aly Y. Ohali A. Ovadia Y. Chachlon H. Yovel Y. Tesler G. Colodney A. Nir S. Zarka A. Tal B. rubin T. Yaacoby Y. Alon Y. Kedar Orit Ben-Zvi Assaraf O. Shainberg H. d. rabinowitch E. Tel-Or Y. Goldwasser d. M. Joel d. Plakhine V. Portnoy G. Tzuri N. Katzir dalia Losner-Goshen A. M. Mayer r. Jacobsohn Z. Tanaami H. Eisenberg Ziva Amsellem Z. Kernyi L. Hornok J. Gressel Adiva Shomer-Ilan Ela Nir daphna Michaeli V. Kampel A. Warshawsky M. Yogev M. Negbi J. Hershenhorn Y. Lavan T. Hilf M. Horowitz M. Cohen I. Hirsch A. Veneziani S. T. Conyers C. H. Bell Ana C. Sá-Fischer C. S. Adler Ch. reichmuth P. W. Flinn d. W. Hagstrum G. N. Mbata r. G. Winks Elisabeth A. Hyne M. Q. Chaudhry A. d. MacNicoll N. r. Price M. Schöller J. -F. dugast r. Plarre S. Navarro E. J. donahaye r. diaz Miriam rindner A. Azrieli P. Trematerra F. Fontana M. Mancini Ailsa d. Hocking Marta H. Taniwaki J. Lacey A. Hamer N. Magan N. Paster F. M. Caliboso d. G. Alvindia G. C. Sabio M. T. dela Cruz Okky Setyawati dharmaputra A. S. r. Putri M. Sidik Eleni Papademetriou A. Varnava C. Mouskos M. A. Malek B. Parveen K. A. dzisi W. O. Ellis Ana Maria Estevez Ljubica Galletti T. Fichet E. Oteiza L. A. Lizana M. X. Gonzalez B. Yakobson Y. Slavezky H. Ephrati El-H. Bartaly r. K. Kashyap M. Gupta W. L. Kashyap B. S. dahiya A. K. dash J. r. rangaswamy r. d. Shroff d. S. Jayas W. E. Muir N. d. G. White L Gaye Weller J. E. van S. Graver Wu-Kang Peng M. Bengston E. Alip C. reed J. G. Leesch G. F. Knapp G. F. russell L. B. Llewellin Ch. Ulrichs H. J. Banks P. C. Annis r. Allanson r. Tauscher K. Westphal S. Mohan M. Gopalan P. C. Sumdarababu V. V. Sree Narayanan Sabine Prozell G. Ziegleder B. Schartmann r. Matissek J. Kraus d. Gerard S. rogg W. raemann r. F. ryan Ya-Nan Wang r. T. Noyes P. Kenkel J. T. Criswell G. W. Cuperus C. J. Waterford C. P. Whittle L. Be Luxembourg Chemicals and Agriculture Ltd. Tel Aviv Israel Agrochemicals Dept. Milchan Bros. Ltd. Ramat Gan Israel Extension Service Ministry of Agriculture Zefat Mevo Hamma Ramat HaGolan Israel Dept. of Weed Science ARO Newe Ya’ar Research Center Haifa Israel Agrochemicals Department Milchan Bros. Ltd. Ramat Gan Israel Tarsis-Agrichem Tel Aviv Israel Weed Control Co. Ltd. Bet Dagan Israel Dept. of Field Crops Vegetables and Genetics The Hebrew University of Jerusalem Faculty of Agriculture Rehovot Israel Plant Protection and Inspection Services Ministry of Agriculture Bet Dagan 50250 Agan Chemical Manufacturers Ltd. Ashdod Israel Dept. of Field Crops Vegetables and Genetics Rehovot Dept. of Agricultural Botany The Hebrew University of Jerusalem Faculty of Agriculture Rehovot Israel Dept. of Weed Science ARO Newe Ya’ar Research Center Haifa Dept. of Botany The Hebrew University of Jerusalem Jerusalem Israel Dept. of Vegetable Crops ARO The Volcani Center Bet Dagan Israel Dept. of Plant Genetics Weizmann Institute of Science Rehovot Israel Inst. for Plant Science Agricultural Biotechnology Center Gödöllö Hungary Dept. of Botany Tel-Aviv University Tel Aviv Israel Dept. of Plant Genetics The Weizmann Institute of Science Rehovot Israel Dept. of Organic Chemistry The Weizmann Institute of Science Rehovot Israel Dept. of Ornamental Horticulture ARO The Volcani Center Bet Dagan Israel Weed Control Co. Ltd. Bet Dagan Chem-Nir Ltd. Kefar Shemaryahu Tiveon-Chem Co. Haifa Israel Central Science Laboratory Ministry of Agriculture Fisheries and Food Slough Berks UK Federal Biological Research Centre for Agriculture and Forestry Inst. for Stored Product Protection Berlin Germany USDA-ARS Grain Marketing and Production Research Center Manhattan USA School of Biological Sciences Abia State University Uturu Nigeria CSIRO Division of Entomology SCMC Nambour CSIRO Division of Entomology Canberra Australia DowElanco Europe Letcombe Laboratory L

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TrANSMISSION-LINE MOdELING OF THE CLASS-E AMPLIFIEr WITH AN ANALYTICAL METHOd

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INTErNATIONAL JOUrNAL OF NUMErICAL MOdELLING-ELECTrONIC NETWOrKS dEVICES ANd FIELdS 1995年第5期8卷 357-366页

作者： YAM, YO CHEUNG, CW LI, CH Department of Electronic Engineering City University of Hong Kong 83 Tat Chee Avenue Kowloon Tong Hong Kong Yu On Yam (Yu-An Ren) graduated from the South China University of Technology Guanzhou china with B. Eng. (EE) and Ph.D. in engineering. he served in the Department of Microwave Electronics Research Institute of Electronics Academia Sinica Beijing China as researcher assoicate professor and full professor. He was awarded a gold medal by the State Commission of Science and Technology PR China in 1985 for his achievement in R&D works. He was also elected as fellow of CIE (the chinese Institute of Electronics). He served briefly in the Institut fur Hochfrequenztechnik TH Darmstadt and Alexander von Humboldt Stiftung of West Germany as a visting professor in 1980–82. In 1986 he returned to Hong Kong where he was born. He joined the Department of Electronic Engineering City University of Hong Kong (formerly known as City Polytechnic of Hong Kong) where he has been ever since. His research interests and publications are in the field of RF and microwave electronics RF circuit design and development and microwave communication engineering. Chi-Hung Li graduated with the B.Eng. (Hons) degree in electronic engineering from City Polytechnic of Hong Kong in 1991 and then the M.Phil. degree in electronic engineering from City University of Hong Kong in 1994. His research interests are RF circuit design simulation and mobile communication engineering.

The transmission line modelling (TLM) technique was used to simulate the class E power amplifier. An analytical method is also used to fix the required component values to ensure the desired output performance of the ... 详细信息

关键词： Transmission line theory

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Application of SOFC for Electric Vehicle

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ECS Proceedings Volumes 1995年第1期1995-1卷

作者： K. Yamada J. Mizusaki H. Sasaki A. Tsunoda H. Yokokawa Y. Yamazaki K. Nakayama Dept. of Chemical System Engineering The University of Tokyo Hongo Tokyo 113 Japan Research Institute for Scientific Measurements Tohoku University Sendai 980 Japan Fundamental Research Lab Osaka Gas Co. Nakadoji Kyoto 600 Japan Corporate R&D Laboratory Tonen Corp. Oimachi Satitama 356 Japan National Institute of Materials and Chemical Research Tsukuba 305 Japan Dept. of Electronic Chemistry Tokyo Institute of Technology Nagatsuda Yokohama 226 Japan Industrial Technology Dept. New Energy and Industrial Technology Development Organization Sunshine 60 Tokyo 170 Japan

Changing from gasoline powered vehicles to electric vehicles (EVs) will provide positive environmental effects. A present disadvantage of EVs with secondary battery systems is a short driving range. This can be improved by the application of a hybrid system of SOFCs and batteries. For that system, both tubular and planer types of SOFCs having 10kW power are designed which can be used for passenger cars with naphtha as fuel operated at 880~850°C. The tubular type has 106 l in volume and 100kg in weight, and were smaller and lighter than the planer type. Subjects to be investigated on SOFCs for EVs are described.

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HOT MACHINING PrOCESS FOr IMPrOVEd METAL rEMOVAL rATES IN TUrNING OPErATIONS

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JOUrNAL OF MATErIALS PrOCESSING technology 1994年第3-4期44卷 199-206页

作者： MAdHAVULU, G AHMEd, B Technology Development Laboratory Bharat Heavy Electricals Ltd. Corporate R&D Division Vikasnagar Hyderabad -500 593 India

This paper deals with the Hot Machining Process, for turning operations, which is designed to give improved metal removal rates, particularly on difficult-to-machine metals. A high temperature plasma arc is used to provide intense localised heat, softening only the chip material, leaving the work piece relatively cool and metallurgically undamaged. The advantages of plasma arc hot machining are increased metal removal rates, machining hard and tough metals, increase in tool life, suitable for interrupted cuts etc... This paper discusses the results of productivity studies and economic viabilities of the Hot Machining Process.

关键词： Machining

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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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robust control of an automatic transmission system for passenger vehicles

Robust control of an automatic transmission system for passe...

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IEEE Conference on Control technology and Applications (CCTA)

作者： Furukawa Hagiwara Fujita Uchida Tochigi R&d Center Honda Research and Development Company Limited Haga Tochigi Japan School of Information Science Japan Advanced Institute of Science and Technology Tatsunokuchi Ishikawa Japan Department of Electrical Engineering Waseda University Shinjuku Tokyo Japan

In recent years, electronic control of automatic transmissions, which provides an effective means of satisfying increasingly strict fuel efficiency requirements and improving drivability and shift quality, is applied to an increasing number of automobile models, and increasingly larger sections of automatic transmissions are electronically controlled. A new automatic transmission control theory which ensures high robustness and sufficient control performance has been developed through application of the H/sub /spl infin// control theory in order to make HONdA automatic transmissions more marketable. This paper reports that their control performance was favorable. This was verified by tests with actual vehicles, and the main processes to which it was applied.< >

关键词： robustness road vehicle control road vehicles H-infinity control

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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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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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