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International Conference on Expert Systems for development

作者： Sang Hun Oh Yoon Joon Lee Myoung Ho Kim Software R&D Laboratories Hyundai Electronics Limited Ichon Kyunggi South Korea Computer Science Department Korea Advanced Institute of Science and Technology Taejon South Korea

ISBN: (纸本)0818657804

Qualitativeness of software is one of major problems for establishing its scientific measurement environment in which engineers can measure their products objectively and in an engineering way. To deal with the qualitativeness, automated tools are essential that integrate systems' expertise represented in the forms of software components. Therefore, after introducing our on-going researches to build a scientific measurement environment of database management systems, we present knowledge-based software components and their application to qualitative measurement. We also present the way to model the qualitative states of the components, together with four heuristics for selection of meaningful landmark values.< >

关键词： Software quality Software measurement Object oriented modeling database systems Software engineering Information processing Software testing research and development Computer science Software tools

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Software Quality Manager: a knowledge-based management tool of software metrics

Software Quality Manager: a knowledge-based management tool ...

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IEEE region 10 International Conference TENCON

作者： Sang Hun Oh Jong Yeon Lee Yoon Joon Lee Myoung Ho Kim Software R&D Laboratories Hyundai Electronics Industries Company Limited Incheon South Korea Department of Computer Science Korea Advanced Institute of Science and Technology Taejon South Korea

ISBN: (纸本)0780318625

The Software Quality Manager (SQM) aims at the construction of a software metrics evaluation environment in which the whole measurement process is performed via an engineering perspective. All the data, information and knowledge required for engineers during the process such as evaluation models and decision supporting knowledge is formally represented and managed to enhance consistency and to reduce misunderstanding. Concurrent measurement and analysis tasks occurring during the process are coordinated in SQM, in order to make the results significant. After defining the software metrics briefly, we present objectives and the three stage structure of SQM in detail. SQM supports qualitative/quantitative measurement techniques and is equipped with knowledge bases for software engineering and application domains. It also utilizes domain knowledge of applications in the form of software components. Finally, we present our ongoing efforts to make the method practical, including construction of two knowledge bases, integration of evaluation techniques, unified calibration units for software metrics, qualitative behavior generation techniques and so on.< >

关键词： Knowledge management Quality management Software quality Software metrics Engineering management Application software Environmental management Software measurement Performance evaluation data engineering

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

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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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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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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 solar cells doped with Cu have been prepared by a screen printing and sintering method. Cell parameters of the sintered solar cells have been investigated in an attempt to find out the optimum doping conditions and concentrations of Cu by adding various amounts of either into layer or into back contact carbon layer. Cell parameters of the sintered solar cells which contained various amounts of in the layers before sintering stay at about the same values as the amount of increases up to 25 ppm, and then decreases sharply as the amount of further increases. The Cu added in the layer diffuses into the layer during the sintering of the composite at 625°C to densify the layer and causes the decrease in the optical transmission of 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 in the layer before sintering. A sintered solar cell which contained 25 ppm in the carbon paste and was annealed at 350°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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ON THE dYNAMIC CHArACTErISTICS OF A rEdESIGNEd rOBOT

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rOBOTICA 1991年第1期9卷 93-98页

作者： PArK, HS CHO, HS Manager Production Engineering R&D Center Samsung Electronics Co. Ltd. Suwon (South Korea). Professer Department of Production Engineering Korea Advanced Institute of Science and Technology P.O. Box 150 Cheongryang Seoul (South Korea)

A robotic manipulator is usually a very complicated system whose dynamics is too computationally time consuming for real-time control. The authors propose general criteria for designing an ideal robot whose dynamics is very much simpler than that of the conventional one. In this paper, dynamic characteristics of an ideally designed robot are investigated. The design guidelines were applied to a 6-degree-of-freedom PUMA 560 robot. Based upon the design concept dynamic equations of the redesigned robot were derived. Utilizing these equations, dynamic characteristics of the redesigned robot are investigated with respect to the computation efforts required, variation of the inertia matrix, joint input torque characteristics, and couplings between the joints. A detailed comparison study is also made between the redesigned and conventional robots.

关键词： IdEAL rOBOTS dESIGN GUIdELINES SIMPLIFIEd dYNAMICS COUPLING MEASUrE

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EFFECTS OF THE SIdEWALL THErMAL CONdITIONS ON THE GAS-FLOWS IN A rAPIdLY rOTATING CYLINdEr

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FLUId dYNAMICS rESEArCH 1991年第3-4期7卷 119-129页

作者： HYUN, JM PArK, JK Department of Mechanical Engineering Korea Advanced Institute of Science and Technology P.O. Box 150 Chong Ryang Seoul Korea Refrigeration Appliances Division R&D center Daewoo Electronics Co. Ltd. No. 604 Yonghyun-Dong Nam-gu Incheon Korea

Numerical studies are presented of the flows of a gas in a rapidly rotating cylindrical container. The reference Ekman number is small, and the peripheral Mach number is O(1). Fluid motions are induced by small differences in the boundary temperatures. In order to assess the effects of thermal boundary conditions at the sidewall on the flow structure and temperature field, three types of conditions at the sidewall are adopted, i.e. a linearly varying, an insulated, and an isothermal temperature condition. Analyses are made of comprehensive and systematically organized numerical results, which have been acquired by solving the complete, compressible Navier-Stokes equations. Contour maps of the temperature and stream function are constructed. In the short-bowl regime, the closed circulation near the sidewall is strongly affected by the thermal conditions;the importance of the work done by compression produced in the radial motions is emphasized. However, the axial flow in the inner inviscid region is found to be mainly controlled by the Ekman suction. In the long-bowl regime, the global flow structure is considerably influenced by the sidewall thermal condition. This is due principally to the significant diffusion of momentum in the radial direction.

关键词： Flow of fluids

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