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International Conference on Communications, Circuits and systems (ICCCAS)

作者： Hua Xu Zupeng Li Hui Zheng National Key Laboratory of Signal Processing IETTC Chengdu China National Digital Switching System Engineering & Technological R&D Center Zhengzhou China The University of Electronic Science & Technology Chengdu China

ISBN: (纸本)0780386477

We propose a non-data-aided (NdA) signal-to-noise-ratio (SNr) estimation algorithm for quadrature amplitude modulation (QAM) signals in an additive white Gaussian noise (AWGN) channel. The NdA SNr estimation algorithm for QAM signals is derived based on a statistical ratio of observables over a block of data. The simple analysis and computer simulation for some kinds of QAM signals have been done, the results of which have proved that all the tested QAM signals can be effectively estimated by this algorithm.

关键词： Quadrature amplitude modulation Signal to noise ratio AWGN Amplitude estimation Additive white noise data analysis Signal analysis Algorithm design and analysis Computer simulation Testing

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On the Load Balancing of a Parallel Switch with Input Queues

On the Load Balancing of a Parallel Switch with Input Queues

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The Fourth International Conference on Parallel and distributed Computing, Applications and Technologies

作者： Yuguo dong Peng Yi Yunfei Guo Jiangxin Wu National Digital Switching System Engineering & Technological R&D Center National Digital Switching System Engineering & Technological R&D Center

ISBN: (纸本)0780378407

The parallel switch is an emerging switch technology,by which we can build a high capacity switching system,such as a terabit switch,from many small switch *** a parallel switch with input queues, the high-speed packets will queue in the input buffer for scheduling,which can highly reduce the control complexity and the internal *** this paper we refer to parallel switch with input queues as Buffered Parallel Switch(BPS). Since the switch fabrics in a BPS are working parallel and independently,we address the open issue of switch fabrics' load-balancing and propose a family of distributed scheduling *** also prove that such load-balancing algorithms can guarantee the delay time of the *** results show the validity and performance of our load-balancing *** considerations on implementing the scheduling algorithms are discussed.

关键词： Parallel switch load balancing buffer scheduling distributed algorithm

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Analysis and designing of the Stable Parallel Packet Switch

Analysis and Designing of the Stable Parallel Packet Switch

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The Fourth International Conference on Parallel and distributed Computing, Applications and Technologies

作者： Yuguo dong Zupeng Li Xiaodong Liu Yunfei Guo National Digital Switching System Engineering & Technological R&D Center National Digital Switching System Engineering & Technological R&D Center

The parallel packet switch attracts a lot of attention from the communications equipment vendors since it can be practically applied into terabit switches and *** order to accelerate its recognition and deployment,we attempt to present the detailed analysis of stability for the parallel packet switch architecture.A model of the stable parallel packet switch(SPPS) is proposed in this *** the constraints of traffic dispatch algorithms,the number of layers and internal speedup for the SPPS are theoretically *** on these results an example of designing SPPS architecture with 1.28T capacity is *** were carried out to investigate the validity and practicality of the designed SPPS.

关键词： packet switch load-balancing buffer speedup

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The Adaptive SAr technology in Non-ATM Network Node

The Adaptive SAR Technology in Non-ATM Network Node

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The Fourth International Conference on Parallel and distributed Computing, Applications and Technologies

作者： Xiaodong Liu Yuguo dong Yunfei Guo Xingmin Zhang Shengping Zhu National Digital Switching System Engineering ＆ Technological R＆D Center No.783 P.O.Box 1001 Zhengzhou450002

＜正＞the IP packet length distribution is changing with the Internet development and *** network also has different IP packet length distribution. Now,the IP packets processing methods of many non-ATM network nodes are similar with Segment and reassemble（SAr）.The payload length of the cell is *** the network node is placed in a network,a large mount of redundant bytes,which result from the zero-pads and headers being used,decrease the processing ***,when a well-designed node is placed in different network with different distribution, the processing bandwidth of the node may be even lower. In this paper,an adaptive IP packets SAr processing solution,which can adapt the traffic of the network,is ***,the computer simulations based on the packet length statistic data[1]are also given.

关键词： adaptive processing non-ATM network node Segmentation and reassembly（SAr） Internet traffic packet length distribution

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40th EASd Annual Meeting of the European Association for the Study of diabetes : Munich, Germany, 5-9 September 2004

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diabetologia 2004年第SUPPL 1期47卷 A1-A464页

作者： Veitenhansl, M. Stegner, K. Hierl, F.-X. dieterle, C. Feldmeier, H. Gutt, B. Landgraf, r. Garrow, A. P. Vileikyte, L. Findlow, A. Waterman, C. Boulton, A. J. M. Shankhdhar, K. Shankhdhar, L. Shankhdhar, U. Petrova, N. L. Foster, A. V. M. Edmonds, M. E. Ferraresi, r. Caravaggi, C. de Giglio, r. Cavaiani, P. Pogliaghi, I. Sommariva, E. Katz, I. A. Harlan, A. Miranda-Palma, B. Prieto-Sanchez, L. Armstrong, d. G. Bowker, J. H. Mizel, M. S. Cernea, S. Wohlgelernter, J. Kidron, M. Modi, P. raz, I. Arbit, E. Nosek, L. Kapitza, C. Beckett, P. Gelfand, r. Goldberg, M. Heise, T. Testa, M. A. Turner, r. r. Hayes, J. F. Scranton, r. E. Simonson, d. C. Yang, Y.-W. Hsu, Y.-J. Naujok, O. Francini, F. Jörns, A. Tiedge, M. Lenzen, S. Abdel-Wahab, Y. H. A. Marenah, L. Orr, d. F. Shaw, C. Flatt, P. r. Chokkalingam, K. Mansell, P. I. Clausen, P. Ekbom, P. damm, P. Feldt-rasmussen, U. Nielsen, B. Mathiesen, E. r. Feldt-rasmussen, B. dewan, S. da Silva, N. Ternan, P. Mc Leong, K. S. Wilding, J. P. H. Asatiani, N. Kurashvili, r. dundua, M. Shelestova, E. Pagava, K. ramazashvili, M. Hod, M. Smirnov, S. Petersen, J. L. A. Justesen, T. I. ringholm Nielsen, L. Müller, C. Højlund, K. Wensaas, A. Kase, E. T. Aas, V. rustan, A. C. Thoresen, G. H. Levin, K. Beck-Nielsen, H. Gaster, M. Im, S.-S. Kang, S.-Y. Kim, S.-Y. Ahn, Y.-H. Lihn, A. S. Schmoll, d. Werner, T. Kienitz, A. Meyer, M. Barthel, A. Ailett, F. Sutherland, C. Walther, r. Grempler, r. Sasson, S. reich, r. Tenenbaum, T. Alpert, E. Anfossi, G. russo, I. Traversa, M. Massucco, P. Mattiello, L. doronzo, G. Trovati, M. Lally, S. Tan, C. Y. Owens, d. Tomkin, G. H. Porchay, I. Péan, F. Bellili, N. Betoulle, d. Balkau, B. Tichet, J. Marre, M. Fumeron, F. Chatellier, G. Alhenc-Gelas, F. Nichols, G. A. Brown, J. B. Hayes, r. P. Bowman, L. drexel, H. Saely, C. H. Marte, T. Benzer, W. Langer, P. Hoefle, G. Moll, W. Aczel, S. Karagiannis, E. Lübben, G. Urquhart, r. Edwards, G. Bruce, S. Howlett, H. S. C. Cugnardey, N. Turner, K. C. Park, J.-S. Fiedorek, F. T. Avogaro, A. Gallo, A. Pinton, P. riz Innenstadt Klinikum der Universität München München Germany Diabetes Center Medizinische Klinik München Germany Medicine The University of Manchester Manchester UK Medicine University of Manchester Manchester UK Podiatry The University of Salford Manchester UK Department of Medicine/Division of Endocrinology Diabetes and Metabolism University of Miami Miami USA Department of Medicine Manchester Royal Infirmary Manchester UK Podiatry L.K.Diabetes Centre Lucknow India Diabetology L.K.Diabetes Centre Lucknow India Medical Nutrition L.K.Diabetes Centre Lucknow India Diabetic Foot Clinic King’s College Hospital London UK Haemodinamic Department - Cardiovascular Division Magenta Hospital Milan Italy Center for the Study and Treatment of Diabetic Foot Pathology Abbiategrasso Hospital Milan Italy Center for the Study and Treatment of Diabetic Foot Pathology Abbiategrasso Hospital Abbiategrasso Italy Department of Orthopedics University of Miami Miami USA Department of Surgery Southern Arizona Veterans Affairs Medical Center Tucson USA Surgery Southern Arizona VA Medical Center Tucson USA Podiatric Medicine and Surgery Rosalind Franklin University School of Medicine and Science North Chicago USA Diabetes Department Center of Diabetes Nutrition and Metabolic Disorders Clug-Napoca Romania Diabetes Unit Hadassah University Hospital Jerusalem Israel Diabetes Unit Hadassah Hebrew University Hospital Jerusalem Israel Research Department Generex Biotechnology Corporation Toronto Canada Hadassah Hebrew University Hospital Jerusalem Israel Medical Research Emisphere Technologies Inc. New York USA Profil Institut fuer Stoffwechselforschung GmbH Neuss Germany Profil Institute for Metabolic Research Neuss Germany Management Profil Inst. für Stoffwechselforschung Düsseldorf Germany Institute for Metabolic Research Profil Neuss Germany Biostatistics Harvard School of Public Health Boston USA Clinical Research Phase V Technologies Wellesley Hills US

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Measurement of proton-induced helium production cross sections for aluminum and nickel below 16 MeV

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JOUrNAL OF NUCLEAr SCIENCE ANd technology 1997年第2期34卷 109-115页

作者： Takao, Y Kanda, Y Hashimoto, H Yamasaki, K Yamaguchi, K Yonemoto, T Miwa, M Etoh, H Nagae, K Department of Energy Conversion Engineering Kyushu University Oita National College of Technology TE R&D Division Advantest Corp. LSI Memory Division NEC Corporation Whirl Pool-Bath System Design Sec. TOTO Ltd. Kitakyushu Plant Construction Center NTT Corp.

Proton-induced He production cross sections, (p, He), for Al and Ni have been measured up to 16 MeV by using a He accumulation method. The reliability of the present experiment was confirmed by performing three kinds of experiments for the Al(p, He). The sample structure or the manner of measuring the number of bombarding protons differs in each experiment. A comparison of their results shows that it is valid to install an Al sample in a Faraday cup for determination of the absolute number of incident protons and to sandwich a sample sheet by two Au foils to catch outgoing alpha-particles from the sample surface layer for measuring the all He produced in the sample.

关键词： helium production cross sections nuclear reactions aluminium target proton beams nickel target helium accumulation method alpha-particles gold foils Faraday cups measuring methods

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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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THE CALLING(SM) NETWOrK - A GLOBAL WIrELESS COMMUNICATION-system

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INTErnational JOUrNAL OF SATELLITE COMMUNICATIONS 1994年第1期12卷 45-61页

作者： TUCK, EF PATTErSON, dP STUArT, Jr LAWrENCE, MH Calling Communications Corporation. 1900 West Garvey Ave South. Suite 200 West Covina CA 91790 USA. Chairman of Calling Communications Corporation. He is also the Managing Director of Kinship Venture Management Inc. the general partner of Kinship Partners 11 and a General Partner of Boundary the general partner of The Boundary Fund. As a venture capitalist he has founded or participated in founding several telecommunications companies including Calling Communications Corporation Magellan Systems Corporation manufactures of Global Positioning System receivers Applied Digital Access manufacturer of DS-3 test access and network performance monitoring equipment Endgate Technology Corporation specialists in satellite phased array antennas and Poynting Systems Corporation. now a division of Reliance Corporation manufacturers of fibre optic transport equipment. He was a founder of Kebby Microwave Corporation where he invented the first solid-state. frequency-modulated commercial microwave link system. The company was acquired by ITT Corporation where he rose to the position of V.P. and Technical Director of ITT North America Telecommunications Inc. Subsequently he was V.P. of Marketing and Engineering at American Telecommunications Inc. (ATC). He was founding Director of American Telecom Inc. a joint venture between ATC and Fujitsu and has served on more than 20 boards of directors including those of three public companies. He has authored articles on microwave engineering and telephone signalling and was a contributor to Reference Data For Radio Engineers. He is a graduate of the University of Missouri at Rolla where he was later awarded an honorary Professional degree and serves on its Academy of Electrical Engineering. Mr Tuck is a Senior Member of the IEEE a Fellow of the Institution of Engineers (Australia) a Professional Member of the AIAA and a registered professional engineer in three states. More than 25 years of experience in the telecommunications industry where he has been responsibl

There is a very large demand for basic telephone service in developing nations, and remote parts of industrialized nations, which cannot be met by conventional wireline and cellular systems. This is the world's largest unserved market. We describe a system which uses recent advances in active phased arrays, fast-packet switching technology, adaptive routeing, and light spacecraft technology, in part based on the work of the Jet Propulsion Laboratory and on recently-declassified work done on the Strategic defense Initiative, to make it possible to address this market with a global telephone network based on a large low-Earth-orbit constellation of identical satellites. A telephone utility can use such a network to provide the same modern basic and enhanced telephone services offered by telephone utilities in the urban centres of fully-industrialized nations. Economies of scale permit capital and operating costs per subscriber low enough to provide a service to all subscribers, regardless of location, at prices comparable to the same services in urban areas of industrialized nations, while generating operating profits great enough to attract the capital needed for its construction. The bandwidth needed to support the capacity needed to gain these economies of scale requires that the system use K(alpha)-band frequencies. This choice of frequencies places unusual constraints on the network design, and in particular forces the use of a large number of satellites. Global demand for basic and enhanced telephone service is great enough to support at least three networks of the size described herein. The volume of advanced components, and services such as launch services, required to construct and replace these networks is sufficient to propel certain industries to market leadership positions in the early 21st Century.

关键词： LOW EArTH OrBIT SATELLITE COMMUNICATIONS FAST PACKET switching EArTH FIXEd CELLS AdAPTIVE rOUTEING LIGHT SPACECrAFT K(A) BANd PHASEd-ArrAY ANTENNAS

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AN AdVANCEd METHOdOLOGY FOr PrELIMINArY HULL FOrM dEVELOPMENT

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NAVAL ENGINEErS JOUrNAL 1984年第4期96卷 147-161页

作者： LIN, WC dAY, WG HOUGH, JJ KEANE, rG WALdEN, dA KOH, IY Wen-Chin Lin:heads the Ship Powering Division at the David Taylor Naval Ship R&D Center (DTNSRDC). Dr. Lin received his B.S. degree in mechanical engineering from the National Taiwan University in 1957. He was awarded his M.S. degree in naval architecture and Ph.D. in engineering science from the University of California at Berkeley in 1963 and 1966 respectively. From 1966 to 1969 he was employed by ESSO Research and Engineering Company to conduct marine hydrodynamic research for oil tankers and offshore structures. Since joining DTNSRDC in 1969 he has actively conducted and directed hydrodynamic research to advance naval ship design technology and improve ship performance. Active in national and international symposia on ship hydrodynamic research he is recognized for contributions to the ship research community. For the past six years he has been a member of the Performance Committee of the ITTC and currently serves as secretary of the committee. He is a member of SNAME and the Society of Naval Architects of Japan. William G. Day Jr:. has been employed as a naval architect at the David Taylor Naval Ship R&D Center since receiving a B.E.S. degree from the Johns Hopkins University in 1966. He obtained an M.S. E. degree from George Washington University in 1971. As Head Design Evaluation Branch of the Ship Performance Department he is responsible for model experiments to evaluate the hydrodynamic performance of ships and propulsors. He is a member of ASNE and SNAME. In-Young Koh:received his B.S. and M.S. degrees in electrical engineering from Lowell University in 1969 and 1971 respectively and his Ph.D. in applied mechanics from Rensselaer Polytechnic Institute in 1976. Dr. Koh joined DTNSRDC as an electronic engineer specializing in the application of advanced instrumentation and computer techniques to ship research and design. He is currently engaged in research and development of active control systems for naval ship applications. Dr. Koh is a member of ASNE SNAME and IEEE. David Andrew Walden:is

A ship design methodology is presented for developing hull forms that attain improved performance in both seakeeping and resistance. Contrary to traditional practice, the methodology starts with developing a seakeeping-optimized hull form without making concessions to other performance considerations, such as resistance. The seakeeping-optimized hull is then modified to improve other performance characteristics without degrading the seakeeping. Presented is a point-design example produced by this methodology. Merits of the methodology and the point design are assessed on the basis of theoretical calculations and model experiments. This methodology is an integral part of the Hull Form design system (HFdS) being developed for computer-supported naval ship design. The modularized character of HFdS and its application to hull form development are discussed.

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SHIP system SEAKEEPING EVALUATION - STOCHASTIC APPrOACH

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NAVAL ENGINEErS JOUrNAL 1979年第6期91卷 33-46页

作者： JOHNSON, rA CArACOSTAS, NP COMSTOCK, EN Mr. Robert A. Johnson is currently a Naval Architect in the Hull Group (SEA 32) Ship Design and Integration Directorate Naval Sea Systems Command. He received his Associate in Engineering degree in Drafting and Design Technology in 1959 his B.S. degree in Aerospace Engineering in 1965 and his M.S. degree in Engineering Mechanics in 1970 all from Pennsylvania State University. In 1973 he was selected for the Navy's Long-Term Training Program at the University of Michigan from which he received his M.S.E. degree in Naval Architecture in 1974. Mr. Johnson began his professional career at the Ordnance Research Laboratory Pennsylvania State University in 1959 where he was involved in the design of hydroelastic submarine models and conducted research in the area of flow-induced structural vibrations. Subsequently he joined HRB-Singer at State College Pennsylvania in 1967 as a Research Engineer and in 1969 joined the former Naval Ship Engineering Center (NAVSEC) where he was employed in the Submarine Structures Branch Surface Ship Structures Branch and the Performance and Stability Branch of the Hull Division. Currently he is the CASDAC Hull System Technical Director and also Head of the Surface Ship Hydrodynamics Section (SEA 32133) Naval Architecture Division Naval Sea Systems Command a member of ASE SNAME and Tau Beta Pi and one of the Navy Subcommittee Members of the Ship Structures Committee. Mr. Nicholas P. Casacostas is currently a Section Chief for Naval Architecture in the Washington D.C. office of M. Rosenblatt & Son Inc. His professional career has been in both Navy and commercially related fields and he has had published several technical papers dealing with the subjects of Ship Propulsion and Hydrodynamics as well as Shipping Economics and Operations. A member of ASNE since 1977 he also is a member of the Royal Institute of Naval Architects and SNAME and presently serving on the latter's H-2 (Resistance and Propulsion) Panel. Mr. Edward N. Comstock is currently a Seakeeping Speciali

The recent trend in Naval Forces has been a shrinking Fleet in both numbers and ship size. This dictates that our ships must have greater operational effectiveness if the Navy is to continue to carry out its mission in the future as it has done in the past. The seakeeping performance of a ship is a major determinant of its overall operational effectiveness. The methodology presented in this paper is a comprehensive approach to the evaluation of a ship's seakeeping performance. The scope of this methodology encompasses the assessment of ship mission scenarios and the relative importance of associated mission requirements as well as the probabilistic description of the uncertainties imposed by the variable ocean environment. The methodology is presented in a general sense so that the seakeeping performance of a ship's configuration can be evaluated as a function of mission scenario, mission area, sea state, ship heading, and speed. In order to utilize the full potential of the methodology, more refined scenario descriptions and more accurate environment specifications must be obtained. A simplified example is presented in which a comparison of the operational effectiveness of two small hull forms is made, using information now available to the designer. It is anticipated that the methodology presented can be used not only as a powerful tool in the decision-making process of practical ship design, but also as the basis for parametric studies of mission strategies.

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