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VLSI Test Symposium

作者： M. Syal M.S. Hsiao K.B. Doreswamy S. Chakravarty Bradley Department of Electrical and Computer Engineering Virginia Polytechnic Institute and State University Blacksburg VA USA Intel Corporation Portland OR USA Intel Architecture Group Intel Corporation Santa Clara CA USA

This paper presents a novel, low cost technique based on implications to identify untestable bridging faults in sequential circuits. Sequential symbolic simulation is first performed, as a preprocessing step, to identify nets which are uncontrollable to a specific logic value. Then, an implication-based analysis is carried out for each fault to determine if a particular fault is testable or not. We also use information about the untestable stuck-at faults to filter out some bridges early in the analysis process. The application of our technique to ISCAS '89 sequential benchmark circuits and a few industrial circuits showed that a large number of untestable bridges could be identified at a low cost, both in terms of memory and execution time.

关键词： Fault diagnosis Circuit faults Bridge circuits Costs Sequential circuits Circuit simulation Logic Circuit testing Information filtering Information filters

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Agent-based modeling and simulation in construction

Agent-based modeling and simulation in construction

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Simulation Winter Conference

作者： Sawhney Bashford Walsh Mulky Del E. Webb Arizona State University Tempe AZ USA Department of Civil and Environmental Engineering San Diego State University San Diego CA USA School of Architecture Rensselaer Polytechnic Institute Troy NY USA

Agent-based modeling and simulation (ABMS) is a relatively new development that has found extensive use in areas such as social sciences, economics, biology, ecology etc. Can ABMS be effectively used in finding answers to complex construction systems? Our focus is to provide some answers to this question. Initial experimentation is conducted to understand the advantages of using ABMS either in isolation or in combination with traditional simulation methodologies. We provide a summary of this experimentation, conclusions and sets the agenda for future research in this area.

关键词： Object oriented modeling Discrete event simulation Biological system modeling Cyclones History Data acquisition Supply chain management Java Environmental factors Power generation economics

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Wind-induced vibration control of bridges using liquid column damper

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Earthquake engineering and engineering Vibration 2002年第2期1卷 271-280页

作者：薛素铎高赞明徐幼麟 College of Architecture and Civil Engineering Beijing University of TechnologyBeijing 100022China Department of Civil and Structural Engineering The Hong Kong Polytechnic UniversityKowloonHong Kong

The potential application of tuned liquid column damper (TLCD) for suppressing wind-induced vibration of long span bridges is explored in this *** installing the TLCD in the bridge deck,a mathematical model for the bridge-TLCD system is *** governing equations of the system are developed by considering all three displacement components of the deck in vertical,lateral,and torsional vibrations,in which the interactions between the bridge deck,the TLCD,the aeroelastic forces,and the aerodynamic forces are fully *** buffeting and flutter analyses are carried *** buffeting analysis is performed through random vibration approach,and a critical flutter condition is identified from flutter analysis.A numerical example is presented to demonstrate the control effectiveness of the damper and it is shown that the TLCD can be an effective device for suppressing wind-induced vibration of long span bridges,either for reducing the buffeting response or increasing the critical flutter wind velocity of the bridge.

关键词： long span bridge bridge deck wind-induced vibration vibration control flutter buffeting tuned liquid column damper TLCD-bridge interaction mathematical model

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FRUSTUM-CONICAL TLD:EXPERIMENTAL BEHAVIOUR AND OPTIMAL DESIGN

FRUSTUM-CONICAL TLD:EXPERIMENTAL BEHAVIOUR AND OPTIMAL DESIG...

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第五届国际振动工程会议

作者： AlessandroDeStefano EmilianoMatta ToyofumiTakada Department of Structural Engineering Turin Polytechnic Italy Department of Structural Engineering Turin Polytechnic Italy Department of Architecture Faculty of Engineering Mie University Japan

Frustum-conical Tuned Liquid Dampershave been recently proposed by the authors as apromising alternative to traditional rectangular andcylindrical *** approaches andexperimental observations show that a frustum-conicalTLD subject to harmonic base motion can be adequatelymodeled as a non-linear TMD having frequency anddamping strongly varying with the excitation *** non-linearity of such an equivalent TMD adds extradifficulties to the classical problem of the optimal designof a TMD control system,traditionally carried out inlinear ***,the classical optimizationmethods provide analytical formulas only for simplecases,being inadequate to explore real *** suggests a genetic algorithm numericaloptimization search for the optimal TLD *** practical cases,a simplified procedure is allowed,in which non-linearity intervenes after the *** problem remains of the robustness of TLDto excitation intensity,which appears the majordrawback in TLD control.

关键词： passive structural control, tuned liquid dampers, optimal location, shaking table testing

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DISCUSSION ABOUT ENVIRONMENTAL PROBLEM CAUSED BY DEEP EXCAVATION

DISCUSSION ABOUT ENVIRONMENTAL PROBLEM CAUSED BY DEEP EXCAVA...

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The 2nd International Conference on New Development in Rock Mechanics and Rock engineering

作者： DAYONG LI YANZHU PAN QINGJUN ZENG Department of Geotechnical Engineering Tongji University Institute of Civil & Architecture Engineering Shandong University of Science & Technology Guangdong Communications Polytechnic

The research about the environment affected by deep excavation is an important *** paper sums up and analyzes thc present research about the building,road,buried pipeline and metro affected by deep excavation,and disc... 详细信息

关键词： DISCUSSION ABOUT ENVIRONMENTAL PROBLEM CAUSED BY DEEP EXCAVATION

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Novel ATPG algorithms for transition faults

Novel ATPG algorithms for transition faults

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IEEE European Test Symposium (ETS)

作者： Xiao Liu M.S. Hsiao S. Chakravarty P.J. Thadikaran The Bradley Department Electrical & Computer Engineering Virginia Polytechnic Institute and State University USA Intel Architecture Group Intel Corporation USA

This paper proposes novel algorithms for computing test patterns for transition faults in combinational circuits and fully scanned sequential circuits. The algorithms are based on the principle that s@ vectors can be effectively used to construct good quality transition test sets. Several algorithms are discussed. Experimental results obtained using the new algorithms show that there is a 20% reduction in test set size, test data volume and test application time compared to a state-of-the-art native transition test ATPG tool, without any reduction in fault coverage. Other benefits of our approach, viz. productivity improvement, constraint handling and design data compression are highlighted.

关键词： Automatic test pattern generation Circuit faults Circuit testing Delay Clocks Compaction Computer architecture Sequential analysis Combinational circuits Sequential circuits

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Design of resonant circuit for zero-current-transition techniques in 100 kW PEBB applications

Design of resonant circuit for zero-current-transition techn...

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

作者： L. Solero D. Boroyevich F.C. Lee Y. Li Department of Mechanical and Industrial Engineering University of ROMA TRE Rome Italy Center for Power Electronics Systems Virginia Polytechnic Institute Blacksburg VA USA International Rectifier System Architecture R and D El Segundo CA USA

In high power inverters and power-factor-correction rectifiers hard switching techniques produce high switching losses, high power dissipation in capacitors and severe conductive EMI. Soft-switching techniques may reduce these problems; in particular zero-current transition techniques are attractive in high power converters, where the minority-carrier devices, such as IGBTs, are the power switches. The aim of this paper is to show theoretical expressions for designing of auxiliary circuit and variable timing control scheme in applications where zero-current transition techniques are used. In order to prove the theoretical approach, extensive analysis is first achieved on the basis of simulation results and then validated on the basis of experimental tests.

关键词： RLC circuits Inverters Rectifiers Switching loss Power dissipation Power capacitors Electromagnetic interference Switching converters Insulated gate bipolar transistors Timing

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贮仓结构参数的频域识别

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振动与冲击 2001年第1期20卷 79-81页

作者：刘增荣黄义邵江 Liu Zengrong Huang Yi SHAO Jiang 西北工业大学土木建筑工程系西安710072 西安建筑科技大学土木建筑工程学院长安大学土木工程地质系 Department of Civil Engineering and Architecture Northwestern Polytechnic University Department of Civil Engineering and Architecture Xian Architecture Science and Technology University Department of Civil Engineering and geology Changan University

本文提出了一种贮仓结构参数的频域识别方法。本文在建立贮仓结构多质点体系计算模式的基础上 ,运用最小二乘识别理论 ,基于分析结果与试验结果的差别 ,迭代修正贮仓多质点体系中的参数 ,建立了贮仓结构参数的频域识别方法 ;并且 ,进行... 详细信息

本文提出了一种贮仓结构参数的频域识别方法。本文在建立贮仓结构多质点体系计算模式的基础上 ,运用最小二乘识别理论 ,基于分析结果与试验结果的差别 ,迭代修正贮仓多质点体系中的参数 ,建立了贮仓结构参数的频域识别方法 ;并且 ,进行了贮仓结构的模态试验 ,实施了贮仓结构参数频域识别的全过程。计算结果表明 ,所建立的方法可产生良好的参数估计。

关键词：贮仓结构模态试验频域参数识别结构动力分析

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Server of quality system for video on demand over ATM

Server of quality system for video on demand over ATM

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IEEE International Conference on ATM

作者： R.M. Silveira W.V. Ruggiero LARC-Laboratory of Computer Architecture and Networks PCS-Department of Computer and Digital System Engineering EPUSP Polytechnic School University of Sao Paulo Sao Paulo Brazil

ISBN: (纸本)0780370937

Considering video transmission over an ATM network for a video on demand system, we propose a server of quality (SoQ) that has the main function of fitting the video transmission rate to the available network bandwidth. The SoQ uses a "backpropagation" neural network to fit the MPEG quantization coefficients in a nonlinear way. Here are shown the SoQ specification and the results obtained from its main module implementation.

关键词： Video on demand Asynchronous transfer mode Bit rate Network servers Bandwidth Neural networks Quality of service Quantization Telecommunication traffic Backpropagation

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Survey of reduced workload and crewing strategies for ocean patrol vessels

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NAVAL ENGINEERS JOURNAL 2001年第2期113卷 29-44页

作者： Baker, C Krull, R Snyder, G Lincoln, W Malone, TB Clifford C. Baker CIE CHFEP is a senior staff scientist at Carlow International Incorporated. He has applied most of his 24 years of experience in the application of human engineering technology to maritime systems. Mr. Baker has directed much of Carlow's efforts to reduce ship workload and to improve human performance and maritime safety through application of human factors methods and data. He is a Certified Industrial Ergonomist (CIE) as well as a Certified Human Factors Engineering Professional (CHFEP). Both certifications were granted by Oxford Research where Mr. Baker also serves as an Advisory Board member. Russell D. Krull P.E. is a senior engineer with A&T/Proteus Engineering with more than 18 years of experi-ence in marine engineering naval architecture and program management including 16 years of active duty in the U.S. Coast Guard. Recent experience includes advanced ship design studies engineering software development technical support for the USMC Advanced Amphibious Assault Vehicle propulsion systems analyses ship structural engineering and cargo handling systems engineering. Mr. Krull has an M.S.E. in naval architecture and marine engineering and an M.S.E. in industrial and operations engineering from University of Michigan and a B.S. in ocean engineering from the U.S. Coast Guard Academy. Capt. Glenn L. Snyder USCG. Regrettably since this paper was originally written Capt. Snyder has passed away. At the time of his death he was an operations specialist assigned to the Coast Guard's Deepwater Capabilities Replacement Project as Chief of Human Systems Integration. He served as commanding officer of the patrol boat Cape George (WPB-95306) the icebreaking tug Biscayne Bay (WTGB-104) and the cutter Legare (WMEC-911). A 1975 graduate of the U.S. Coast Guard Academy Capt. Snyder held an M.A. in national security and strategic studies from the U.S. Naval War College and an M.A. in international relations from Salve Regina College. In addition he was a 1998 fellow of the Foreign Service

The U.S. Coast Guard is in the concept exploration phase of its Integrated Deepwater System (IDS) acquisition project. This project will define the next generation of surface, air and command, control, communications, computers, intelligence, surveillance, and reconnaissance (C4ISR) assets used to perform the Coast Guard's missions in the IDS environment (>50 NM off the U. S. coastline). As part of early technology investigations, the needs exist to: (1) analyze the workload requirements of the IDS, (2) identify alternative means to perform ship's work, and (3) optimize ship manning consistent with ship workload, performance criteria, and the available tools and equipment aboard. To reduce shipboard work requires an understanding of the mission and support requirements placed on the vessel and crew, how these requirements are currently met, and how requirements might otherwise be met to reduce workload and crew size. This study examined currently implemented workload and manpower reducing approaches of commercial maritime fleets, U.S. and foreign navies, and foreign coastguards. These approaches were analyzed according to evaluation criteria approved by the IDS acquisition project team. From this, strategies for shipboard work reduction that may be considered for adoption by the IDS were identified and analyzed according to performance and costs factors. Ten workload-reducing strategies were identified: damage control, bridge, multiple crewing, engineering, risk acceptance, modularity, deck, enabling technologies, ship/personnel readiness, and operability and maintainability.

关键词： Naval vessels

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