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Proceedings. 1998 IEEE/RSJ International Conference on Intelligent Robots and systems. Innovations in Theory, Practice and Applications (Cat. No.98CH36190)

作者： F. Kobayashi T. Fukuda K. Shimojima T. Takusagawa Departmemt of Micro System Engineering Nagoya University Nagoya Japan Center for Cooperative Research in Advanced Science & Technology Nagoya University Nagoya Japan Materials Processing Departmemt National Industrial Research Institute of Nagoya Nagoya Japan Engineering Research & Development Departmemt Japan Airlines Ota-ku Tokyo Japan

In this paper, we propose a new method for reconstructing the shape of objects by multiple vision modules. This proposed method uses the stereo vision module and the shape-from-shading module. In stereo vision module, the conjugate pair of edge pixels is determined by structural analysis and the height is calculated by the triangulation. In shape-from-shading module, we use the Phong model (1975) as the reflectivity function and identify the reflectivity function by evolutionary programming. Then, we estimate the normal vector of pixels. An important feature of our shape reconstruction is that these modules complement insufficient information each other. We show the simulated result for reconstructing the shape of simulated objects.

关键词： Stereo vision Image reconstruction Optical reflection Shape measurement Reflectivity Shape control Photometry Materials processing Functional programming Genetic programming

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Adaptive control for the steam temperature of thermal power plants

Adaptive control for the steam temperature of thermal power ...

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IEEE Conference on Control technology and Applications (CCTA)

作者： S. Matsumura K. Ogata S. Fujii H. Shioya Department of Mechanical Engineering Daido Institute of Technology Nagoya Japan Electric Power Research & Development Center Chubu Electric Power Company Inc. Nagoya Japan School of Engineering University of Nagoya Nagoya Japan System Engineering & Application Department Bailey Japan Company Limited Tagata Shizuoka Japan

An adaptive control system was applied to control the steam temperature of utility boilers. In the control system, an adaptive control strategy is embedded on the DCS controllers in parallel with each conventional PID controllers for the boiler. The authors have successfully implemented the proposed system at Chubu Electric Power's Nishi-Nagoya No.3 unit and Owase-Mita No.l unit for controlling the main and reheat steam temperatures. The control improvement takes the form of reduced magnitude of temperature excursions caused by load changes, especially in the reheated steam temperature.

关键词： Adaptive control Power generation Control systems Temperature control Boilers Three-term control Power engineering and energy Error correction Fuels Furnaces

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800 MHz-band low noise low distortion Si-MMIC front-end using BJT/MOSFET LNA and MOSFET mixer

800 MHz-band low noise low distortion Si-MMIC front-end usin...

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Microwave, MTT-S International Symposium

作者： N. Suematsu M. Ono S. Sugiyama S. Kubo M. Uesugi K. Hasegawa K. Hiroshige Y. Iyama O. Ishida Information Technology Research & Development Center Mitsubishi Electric Corporation Limited Kamakura Kanagawa Japan ULSI Laboratory Mitsubishi Electric Corporation Limited Japan Communications Equipment Works Mitsubishi Electric Corporation Limited System LSI Division Mitsubishi Electric Corporation Limited Japan Communication Systems Business Division Mitusubishi Electric Corporation Japan

Both low noise and low distortion characteristics are strongly desired for cellular terminal receiver application. In the case of Si-MMIC, BJT has superior feature in its low noise performance and MOSFET has it in low distortion performance. By using BJT amplifier as the 1st stage of LNA and MOSFET as the 2nd stage of LNA and a down mixer, both low noise and low distortion performance is achieved. The fabricated Si-MMIC front-end, which contains two-stage LNA and down mixer and LO amplifier, performs 3.7 dB NF, 16.7 dB conversion gain and -15.5 dBm IIP/sub 3/ with 3V/13.7 mA d.c. power and -10 dBm LO power.

关键词： MOSFET circuits Noise measurement MMICs Band pass filters Performance gain BiCMOS integrated circuits Power supplies Frequency measurement Gain measurement Semiconductor device measurement

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A Single-Chip MPEG/Audio Decoder LSI Based on a Compact Decoding Algorithm

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Journal of VLSI Signal Processing systems for Signal, Image, and Video technology 1997年第1期16卷 25-30页

作者： Iwadare, Masahiro Takano, Hideto Shibuya, Yoshitaka Sakamoto, Hideki Kuwajima, Takeshi Kitabatake, Osamu Kobayashi, Naoko Info. Technology Research Labs. NEC Kawasaki Japan ULSI Systems Development Labs. NEC Kawasaki Japan NEC IC Microcomputer Systems Osaka Japan System Micro Division NEC Kawasaki Japan University of Tokyo Japan NEC Corporation Kawasaki Japan Info. Technol. Research Laboratories Japan University of California Santa Barbara CA United States Inst. Electronics Info. Commun. E. Japan Musashi Institute of Technology Tokyo Japan 2nd Syst. LSI Development Laboratory ULSI System Development Laboratories System LSI Operations Unit Japan Kanagawa Japan Tokyo Institute of Technology Tokyo Japan Osaka Prefecture University Japan 2nd Systems Development Laboratory ULSI Syst. Development Laboratories System LSI Operations Unit Sophia University Tokyo Japan NEC Corporation Japan Audiovisual LSI Department System Micro Division Osaka Institute of Technology Japan NEC IC Microcomputer Systems Ltd. Kawasaki Japan System LSI Development Department Kansai LSI Development Center Osaka Japan Univ. of Shibaura Inst. of Technol. Japan Audiovisual LSI Department System Micro Division System LSI Operations Unit

A single-chip decoder LSI is developed for ISO/IEC MPEG (the International Organisation for Standardisation/the International Electrotechnical Commission, Moving Pictures Expert Group) audio. The applicable layers are Layer I and II of MPEG-1 and MPEG-2/Lower-Sampling-Frequency Mode. A fast calculation algorithm, which is also effective for on-chip memory reduction, is incorporated in audio signal synthesis. The reliability in bitstream synchronization is improved by including bitstream inconsistency detection. Bitstream error concealment by repeating previous audio data is supported. The decoding delay is adjustable when an optional external memory is connected to the LSI.

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Self-commutated SVC with compensation of harmonic and negative-phase-sequence currents using digital control system

Self-commutated SVC with compensation of harmonic and negati...

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Conference Record of the IEEE Industry Applications Society Annual Meeting (IAS)

作者： H. Kishibe Y. Yoshioka S. Konishi Research & Development Center Power System & Power Electronics Technology Sec. Tohoku Electric Power Company Inc. Japan Power Electronics Development Laboratory Fuji Electric Corporate Research and Development Limited Hino Tokyo Japan

To improve the operating ability of future transmission systems and to prevent the inflow of harmonic currents and negative-phase-sequence current, the authors have developed a self-commutated static VAr compensator (SVC) with a digital control. For the control system to realize superior accuracy, high performance functions and easy maintenance, a direct digital control system (DDC system) is used. The DDC system is composed of multiple CPUs and DSPs. In a preliminary verification before installing the proposed SVC in the power system, the authors verified the compensating function of the proposed SVC with a mini-model and an analog-simulator. The results of the tests and simulations with the mini-model and the analog-simulator confirmed that the proposed SVC could sufficiently compensate for voltage fluctuation and the inflow of harmonic currents and negative-phase-sequence current. Therefore, the effectiveness of compensation with the DDC system was confirmed.

关键词： Static VAr compensators Power system harmonics Circuits Control systems Power system simulation Voltage control Digital control Voltage fluctuations Power system modeling Power electronics

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A reverse engineering method and experiences for industrial COBOL system

A reverse engineering method and experiences for industrial ...

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Asia-Pacific Conference on Software Engineering

作者： I. Nagaoka K. Sanou D. Ikeo T. Nagashima S. Akiba M. Tsuda Institute of Advanced Business Systems Hitachi and Limited Yokohama Kanagawa Japan Information Systems Department Kawasaki Streel Corporation Chiyoda Tokyo Japan Information Technology Center Kawasaki Steel System Research and Development Corporation Chiyoda Tokyo Japan

One of the most important things in restructuring current system is to clarify business specification which are implemented in the current system. Reverse engineering technology, which extracts reusable business specification from a system, is very effective for this purpose. We have developed DORE (Data Oriented Re-Engineering), a re-engineering methodology for system restructuring, and tools that support reverse engineering. By using these methodology and tools, it becomes possible to extract business specification which should be implemented in the new system, from the current system. In this paper, we present the re-engineering methodology and tools, and introduce a case study in Kawasaki Steel Corporation, in which those methodology and tools are used.

关键词： Reverse engineering Data mining Steel Information technology research and development Data engineering Costs Information systems Employment Business process re-engineering

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Application of 3-D nonlinear wave-load and structural-response simulations in naval ship design

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NAVAL ENGINEERS JOURNAL 1997年第3期109卷 253-266页

作者： Engle, A Lin, W Salvesen, N Shin, Y Allen H. Engle:is a naval architect in the Hydrodynamic Division of the Naval Sea Systems /Command (NavSea). He received his B.S. degree in engineering scinece from the State University of New York at Buffalo in 1977 and his M.S. degree in ocean engineering from the Unviersity of Hawaii in 1979. Corrently Mr. Engle is the program director of the Navy's Hydrodynamic Loads Technology Development Program. Mr. Engle is Chairman of SNAME Panel on Hull Loadings (HS-1) and contributing member to the International Ship and Offshore Structures Congress's Committee on Dynamics. Moei-Min Lin:is a senior research scientist at the Ship technology Division of Sciences Applications International Corporation (SAIC). He received his B.S. degree in naval architecture and marine engineering from the National Cheng-Kung University Taiwan in 1977 and his Ph.D. degree in ocean engineering from MIT in 1985. He is an expert in computational ship hydrodynamics. He has been the P.I. for development of the Large Amplitude Motions Program (LAMP) system. Nils Salvesen:is the manager of the Ship Technology Division of the Science Application International Corporation (SAIC).He received his B.S. and Ph.D. degree from the Development Naval Architecture and Marine Engineering of the University of Michigan in 1960 and 1966 respectively. He has more then thirty years of experience in the development of ship motion simulation and wave load prediction methods. More than twenty-five years ago he developed the original strip-theory code on which the Navy's ship motions program (SMP) is based. Yung-Sup Shin:is the principal engineer responsible for the hydrodynamic projects in the Research and Development Department of the American Bureau of Shipping New York. He received a Ph.D. degree in hydrodynamic from the Department of Naval Architecture and Marine Engineering of the University of Michigan. In the past eighteen years at ABS he has been involved in the theortical development and analysis of various marine hydrodynamic problems. In recent year

Despite the limits inherent within linearized frequency-domain ship motion and wave load computer codes, strip theory has been found to provide the design community with a fairly robust, practical design tool with reasonable accuracy for most conventional displacement monohulls. However, the advent of new design concepts including multi-hulls and application of new materials as well as the push to incorporate reliability methods within surface ship structural design criteria has highlighted the need for more rigorous methods of developing a lifetime load spectrum. In this paper, a multilevel computation system for predicting ship motions and wave loads, up through and including extreme sea conditions, is presented. This system includes a traditional strip theory approach and newly developed linear and nonlinear three-dimensional time-domain methods. The new nonlinear methods are currently in the process of being validated by the U.S. Navy. The status of the current development is presented. Sample numerical results from the new nonlinear methods are compared with both linear frequency domain predictions and model tests.

关键词： Naval vessels

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Low-frequency noise characteristics of self-aligned AlGaAs/GaAs HBTs with a noise corner frequency below 3 kHz

Low-frequency noise characteristics of self-aligned AlGaAs/G...

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IEEE Symposium on Radio Frequency Integrated Circuits (RFIC)

作者： Jin-Ho Shin Jiyoung Kim Yujin Chung Joonwoo Lee Kyu Hwan Ahn Bumman Kim Department of E.E.E. and Microwave Application Research Center POSTECH Kyungpuk South Korea Advanced Devices Group Devices and Materials Laboratory LG Corporate Institute of Technology Seoul South Korea Photonics Device Laboratoryoratory System IC Research and Development Laboratory Hyundai Electronics Industries Company Limited Icheon Kyunggi South Korea

We have investigated the surface recombination and its 1/f noise properties of AlGaAs/GaAs HBTs as a function of the emitter-base structure and the surface passivation condition. It is found that the surface recombination 1/f noise can be significantly reduced by the heterojunction launcher of the abrupt junction with 30% Al mole fraction emitter. The depleted AlGaAs ledge surface passivation further suppresses the surface recombination currents. Consequently, we have achieved a very low 1/f noise corner frequency of 2.8 kHz at the collector current density of 10 kA/cm/sup 2/. The dominant noise source of the HBT is not a surface recombination current, but a bulk current noise. This is the lowest 1/f noise corner frequency among the III-V compound semiconductor devices, and comparable to those of low-noise Si BJTs.

关键词： Low-frequency noise Gallium arsenide Semiconductor device noise Radiative recombination Passivation Frequency Noise reduction Current density Heterojunction bipolar transistors III-V semiconductor materials

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Developing a prototype concurrent design tool for composite topside structures

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NAVAL ENGINEERS JOURNAL 1997年第3期109卷 279-290页

作者： Dirlik, S Hambric, S Azarm, S Marquardt, M Hellman, A Bartlett, S Castelli, V Steve Dirlik:began his career at the Naval Surface Warfare Center Carderock Division in 1981 as an aerospace engineer co-op student. He completed his bachelor of science degree in aeropace and ocean engineering from Virginia Polytechnic Institute and State University in 1985 and his master of science degree in aerospace engineering from the University of Maryland in 1990. Mr. Dirlik recently completed a master of science program in applied physics at The Johns Hopins University and currently works in the Radar Cross Section and Target Physics Branch of the Signatures Directorate at the Naval Surface Warfare Center Corderoke Division. He has worked on Navy low observable programs since 1990. Stephen Hambric:is a research associate at the Applied Research Laboratory at The Pennsylvania State University. He received his B. S. and M.S. degree in mechanical engineering from Virginia Polytechnic Institute and State University and his D. Sc. in mechnical engineering from the George Washington University. He has worked on several computer aided multidiscikplinary design and optimization projects over the years including an automated propeller design system and a structural acoustic optimization capability. Dr. Shpour Azarm:is currently working as an associate professor with the Design and Manufacturing Group of the Department of Mechanical Engineering at the University of maryland at College Park. Dr Azarm's expertise is in the areas of optimization-based designed and concurrent design and optimization of multidisciplinary systems. He was a consultant at Black & Decker Corporation (summer 1996) and worked as a Navy senior summer faculty fellow (summer 1995) and a NASA summer faculty fellow (summer 1994). He was a visiting scientist at NASA Langley Research Center for Multidisciplinary Analysis and Applied Structural Optimzatiom at the University of Siegen in Germany (spring 1992) and the Design Institute of the Technical University of Denmark (summer 1990). Dr Azarm was an associate technical editor of the ASME Jour

A prototype concurrent engineering tool has been developed for the preliminary design of composite topside structures for modern navy warships. This tool, named GELS for the Concurrent Engineering of Layered Structures, provides designers with an immediate assessment of the impacts of their decisions on several disciplines which are important to the performance of a modern naval topside structure, including electromagnetic interference effects (EMI), radar cross section (RCS), structural integrity, cost, and weight. Preliminary analysis modules in each of these disciplines are integrated to operate from a common set of design variables and a common materials database. Performance in each discipline and an overall fitness function for the concept are then evaluated. A graphical user interface (GUI) is used to define requirements and to display the results from the technical analysis modules. Optimization techniques, including feasible sequential quadratic programming (FSQP) and exhaustive search are used to modify the design variables to satisfy all requirements simultaneously. The development of this tool, the technical modules, and their integration are discussed noting the decisions and compromises required to develop and integrate the modules into a prototype conceptual design tool.

关键词： Warships

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Building ships as a system: An approach to total ship integration

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NAVAL ENGINEERS JOURNAL 1997年第5期109卷 47-60页

作者： Duren, BG Pollard, JR Bernard G. Duren:is an operations research analyst in the Combat Systems Department of the. Naval Surface Warfare Center Dahlgren Division. Mr. Duren received an A.B. degree in mathematics from Indiana University and an M.S. degree in operations research from the Georgia Institute of Technology. His major duties involve development of system concepts and system engineering methodology. His primary areas of achievement include startup of a strategic planning process at the Dahlgren Division analysis of seaskimmer defense issues and formulation of concepts for counter-command warfare. His areas of interest include information integration group problem solving methods warfare analysis and strategic planning. Mr. Duren is currently conducting studies in design of future shipboard combat systems. James R. Pollard:serves as principal systems engineer in the Combat Systems Department of the Naval Surface Warfare Center Dahlgren Division. Dr. Pollard received a B.S. degree in physics from Roanoke College an M.S. degree in electrical engineering from The George Washington University and a Ph.D. in systems engineering from the University of Virginia. After joining the Dahlgren Division in 1962 he performed research in antennas and electromagnetic coupling. He subsequently managed the Special Effects Weapon Research Program which focused on high power electromagnetic devices. After serving as head of the Weapon Systems Division and the Search and Track Division he formed the Strategic Planning Group. In 1985 he received the Bernard Smith Award for creative development and implementation of a strategic planning process for the Division. From 1985 to 1987 he served as warfare systems architect in the Space and Naval Warfare Systems Command. Dr. Pollard is currently conducting studies in design of future shipboard combat systems.

This paper considers an effort to reinvent the process by which the Navy transforms operational requirements into warships. The objective is to articulate a framework and strategy for implementing a total ship system engineering approach. Three factors drive the effort: involve the warfighters in the design process;adopt a ''system of systems'' framework for integration;and continually improve the acquisition process. The strategy is illustrated by consideration of control structure on a total ship basis. The work has been conducted as a collaborative effort involving three Navy warfare centers and various headquarters activities in Washington, D.C.

关键词： Shipbuilding

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