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New Trend in Control of Steady-state Large-scale systems *

IFAC Proceedings Volumes 2004年第11期37卷 455-460页

作者： Bai-Wu WAN Ding LIU Xiaoe RUAN Institute of Systems Engineering State Key Laboratory for Manufacturing Systems Engineering Xi'an Jiaotong University P.R. China School of Automation Xi'an University of Technology P.R.China Dept. of Electrical Engineering & Computer Science Korea Advanced Institute of Science and Technology 373-7 Guseong-dong Yuseong-gu Daejeon 305-701 Korea Faculty of Science Xi'an Jiaotong University P.R.China

This paper reviews what the first Author and his Group have been investigating for the past decade in the on-line steady-state hierarchical intelligent control and optimization of large-scale industrial processes (LSIP), as well as large-scale systems (LSS). The techniques include the use of neural networks for identification and optimization, the use of expert systems to solve some kinds of hierarchical multi-objective optimization problems, the use of the fuzzy logic control and the use of the iterative learning control. In addition, several implementation examples and the product quality control for LSS are introduced. Finally the paper prospects the new stages of development.

关键词： Large-scale systems industrial control intelligent control optimization quality control

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UTMAC: A C ++ library for multi-agent controller design

UTMAC: A C ++ library for multi-agent controller design

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Proceedings of the Biannual World Automation Congress

作者： N. ShahidI M. Gheiratmand C. Lucas H. Esmadizade Department of Electrical and Computer Engineering Univ. of Tehran Tehran Iran Center of Excellence for Control and Intelligent Processing ECE Department School of Intelligent Systems I.P.M. University of Tehran Tehran Iran ECE Dept. Univ. of Tehran and Sehool of Intelligent Systems I.P.M Tehran Iran Department of Electrical and Computer Engineering Univ of Tehran Tehran Iran

UTMAC is an object-oriented C++ class library, developed for design, implementation and simulation of multi-agent controllers. Using UTMAC, the control problem under analysis should be decomposed into several partial sub-problems to be solved by controller-agents, which can be implemented as reusable entities. UTMAC uses a non-centralized simulation scheme in which cash agent simulates itself. In this paper the structure of UTMAC is explored and design of a simple reusable multi-agent controller is provided to illustrate the work and show the convenience of design and implementation.

关键词： Libraries Java Process control Intelligent control Intelligent systems Computational modeling computer simulation Control systems Packaging

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Low workfunction fully silicided gate on SiO/sub 2//Si and LaAlO/sub 3//GOI n-MOSFETs

Low workfunction fully silicided gate on SiO/sub 2//Si and L...

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Device Research Conference

作者： D.S. Yu A. Chin B.F. Hung W.J. Chen C.X. Zhu M.-F. Li S.Y. Zhu D.L. Kwong Department of Electronics Engineering Nano Sci. Tech. Center Univ. System of Taiwan National Chiao Tung University Hsinchu Taiwan Dept. of Electronics Eng. Univ. System of Taiwan Hsinchu ROC Taiwan ROC Graduate Inst. of Materials Eng. National Pingtung University of Science and Technology Pingtung Taiwan Dept. of Electrical & Computer Eng. National Univ. of Singapore Singapore Dept. of Electrical & Computer Eng. National Univ. of Singapore Singapore Singapore Dept. of Electrical & Computer Engineering The Univ. of Texas Austin TX USA

The main challenges for metal-gate/high-k CMOS are to find dual workfunction gates and robust high-k dielectrics. The low workfunction metal-gate for n-MOS is especially difficult since it reacts with oxygen rapidly and is hard to form a silicide or nitride. We have successfully developed 4.2 and 4.3 eV low workfunction NiSi:Hf and NiTiSi gates that were integrated onto SiO/sub 2//Si, novel high-k LaAlO/sub 3//Si and LaAlO/sub 3//GOI n-MOSFETs. The Hf or TiSi is for low workfunction control and the NiSi is for low resistivity.

关键词： MOSFET circuits Artificial intelligence Voltage Capacitors Capacitance-voltage characteristics Electron mobility

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8.6.3 Maintenance Practices and Metrics across Defense and Commercial systems

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INCOSE International Symposium 2004年第1期14卷 1810-1820页

作者： Ramchand, Ramya Tatikonda, Nirmala Verma, Dinesh Nance, Richard E. System Integration Laboratory Stevens Institute of Technology HobokenNJ07030 United States Systems Research Center Virginia Tech BlacksburgVA24060 United States Dept. of Systems Engineering & Engg. Mgmt Stevens Institute of Technology HobokenNJ07030 United States Dept. of Computer Science Virginia Tech BlacksburgVA24060 United States

systems and software engineering are converging disciplines with increasing evolution of modern complex systems towards increased information and knowledge content. Further, with the capital investment associated with such systems and their long operational life spans, a longer-term notion of quality during design and implementation is necessary. The realities of cost, safety, and staffing considerations are forcing increasing emphasis on reuse and reengineering strategies. This imperative becomes even more urgent with the thrust towards the inclusion of commercial-off-the-shelf components in system architectures. One key operational imperative for complex systems is the cost of maintenance. This paper presents an industry survey conducted to understand maintenance practices prevalent in commercial and defense industries. Results from an industry survey focused on system maintenance measures and metrics are also presented. This survey focused on information and knowledge intensive systems and was supported by INCOSE-The International Council on systems engineering and SOLE-The International Society of Logistics. © 2004 The Authors.

关键词： Investments

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8.6.2 Maintainability Considerations for Software Intensive systems

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INCOSE International Symposium 2004年第1期14卷 1797-1809页

This paper reflects one aspect of an overall research initiative to better understand and articulate the "cause and effect" relationship between design causes and operational effects. Here the specific focus is on "before the fact" system maintainability. Maintenance considerations for software intensive systems must be addressed early in design and must focus on the entire system life cycle. Use of commercial-off-the-shelf (COTS) components in system architectures reinforces this need. COTS usage can be readily observed in modern commercial and defense systems. Such architectures are often characterized by an evolving physical baseline (technology refreshment) driven by obsolescence considerations. This paper proposes aspects of a framework to evaluate system architectures, with a particular focus on system maintainability and with the objective of positively influencing the long-term cost of operational maintenance. © 2004 The Authors.

关键词： Maintainability

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Charge trapping effects in HfSiON dielectrics on the ring oscillator circuit and the single stage inverter operation

Charge trapping effects in HfSiON dielectrics on the ring os...

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International Electron Devices Meeting (IEDM)

作者： C.Y. Kang J.C. Lee R. Choi J.H. Sim C. Young B.H. Lee G. Bersuker Microelectronics Research Center Department of Electrical and Computer Engineering University of Technology Austin TX USA Department of Electrical and Computer Engineering University of Texas Austin TX Dept. of Electr. & Comput. Eng. Texas Univ. Austin TX USA International SEMATECH Austin TX International SEMATECH Austin TX USA IBM assignee

For the first time, the effects of fast transient charge trapping in high-k devices on ring oscillator circuit operation are reported in comparison with SiO/sub 2/ devices. At high V/sub dd/ regime, the propagation delay for high-k devices was shorter than that of SiO/sub 2/. However, at low V/sub dd/, high-k devices show longer propagation delay. These results suggest that the performance of high-k device is improved significantly in the high-speed circuits, where the fast transient charge trapping can be negligible. Single pulse measurement and single stage inverter analysis support that the fast transient charge trapping effects can be negligible at higher frequency and the fast transition can exclude charge-trapping effects on the circuit operation.

关键词： Ring oscillators Circuits Inverters High-K gate dielectrics High K dielectric materials Pulse measurements Propagation delay Dielectric measurements Degradation Transient analysis

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RoboCup: Yesterday, today, and tomorrow workshop of the executive committee in Blaubeuren, october 2003 1

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7th Robot World Cup Soccer and Rescue Competitions and Conferences, RoboCup 2003

作者： Burkhard, Hans-Dieter Asada, Minoru Bonarini, Andrea Jacoff, Adam Nardi, Daniele Riedmiller, Martin Sammut, Claude Sklar, Elizabeth Veloso, Manuela Humboldt University Berlin BerlinD-10099 Germany Dept. of Adaptive Machine Systems Graduate School of Engineering Osaka University SuitaOsaka565-0871 Japan HANDAI Frontier Research Center Graduate School of Engineering Osaka University SuitaOsaka565-0871 Japan Department of Electronics and Information Politecnico di Milano Italy National Institute of Standards and Technology United States Dip. Informatica e Sistemistica Univ. "La Sapienza" Roma Italy Universtaet Osnabrueck Institute for Cognitive Science Albrechtstr. 28 D-49069 Germany School of Computer Science and Engineering University of New South Wales Sydney2052 Australia Dept. of Computer Science Columbia University 1214 Amsterdam Avenue MC 0401 New YorkNY10027-7003 United States Computer Science Department Carnegie Mellon University PittsburghPA15213-3890 United States

ISBN: (数字)9783540259404

ISBN: (纸本)3540224432

RoboCup has been known for the goal of “creating robots capable of beating the world cup in 2050.” Clearly, we stated this goal back in 1996 not as an exact scientific goal, but as an audacious challenge to pursue. We aimed at creating a far away target for RoboCup researchers, as we were well aware that the development of fully autonomous soccer robots capable of competing against human world champion soccer players was a rather long term research project.

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Data centers revisited: Assessment of the energy impact of retrofits and technology trends in a high-density computing facility

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Journal of Infrastructure systems 2004年第3期10卷 98-104页

作者： Blazek, Michele Chong, Huimin Loh, Woonsien Koomey, Jonathan G. Technology and Environment AT and T 4430 Rosewood Dr. Pleasanton CA 94930 United States Singapore Computer Systems Ltd. Braddel Hill #04-28 Singapore 579726 Singapore InfoComm Devment. Auth. of Singapore 7 Siglap Rd. Singapore 448909 Singapore Dept. of Civil/Environ. Engineering Terman Engineering Center Stanford Univ. Stanford CA 94305-4020 United States

As information and communications technology matures, the nature of the infrastructure that supports it evolves and specializes. While the telephone infrastructure had been built as a network with central offices acting as hubs, the information and communications technology maintains a similar structure, but instead, has hubs of specialized Internet data centers which house the routers and servers. This paper updates one of the first studies to document the electricity consumption and power distribution within an Internet data center. For this study, electricity billing data, metering data, and facility floor space allocation data were used to calculate computer room, total computer room, and building power densities for July 2002. The results of this 2002 study indicate that although the data center had expanded its operations by roughly 33% from the previous year and increased the electricity demand associated with the computer equipment by 55%, the total computer room power density (which includes cooling and auxiliary equipment) remained the same as the previous year at 355 W/m2. The facility's efforts to improve energy efficiency offset the energy demand from an increased, electrically active, computer room area. The energy-efficiency measures included better optimization of power distribution units, power management modules, computer room air-conditioning units, alterations to operating conditions, facilitywide reductions in lighting, and improved facility controls. A key recommendation is to expand this research to address the need to develop metrics to capture the energy efficiency of the data network throughput. © ASCE.

关键词： Communication systems

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Balancing of Transfer Lines with Simultaneously Activated Spindles

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IFAC Proceedings Volumes 2004年第4期37卷 45-50页

作者： Alexandre Dolgui Nikolai Guschinsky Genrikh Levin Mohamed-Aly Louly Sana Belmokhtar Scientific Methods for Industrial Management Dept. (MSGI) Industrial Engineering and Computer Sciences Center (G2I) Ecole des Mines de Saint Etienne 158 cours Fauriel 42023 Saint Etienne Cedex 2 France United Institute of Informatics Problems National Academy of Sciences of Belarus Surganov Street 6 220012 Minsk Belarus Laboratory for Industrial Systems Optimisation (LOSI) University of Technology of Troyes 12 rue Marie Curie 10010 Troyes France

A balancing problem for transfer lines with parallel spindles is investigated. All spindle heads of the same workstation are activated simultaneously. The relations of the necessity of executing some operations at the same workstation, the possibility of combining the spindles at the same workstation as well as precedence constraints are given. The problem is to choose spindle heads from a given set and allocate them to workstations in such a way that i) all the operations are performed, ii) all constraints are satisfied, iii) the cycle time is provided, and iv) the line cost is minimal. The proposed method for solving the problem is based on its formulation as a mixed integer problem (MIP).

关键词： Machining line balancing optimization MIP

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Dynamic scheduling issues in SMT architectures

Dynamic scheduling issues in SMT architectures

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International Parallel and Distributed Processing Symposium, IPDPS 2003

作者： Shin, Chulho Lee, Seong-Won Gaudiot, Jean-Luc System Design Technology Laboratory Samsung Electronics Corporation Korea Republic of Dept. of Electrical Engineering - Systems University of Southern California United States Dept. of Electrical Engineering and Computer Science University of California Irvine United States

ISBN: (纸本)0769519261

Simultaneous multithreading (SMT) attempts to attain higher processor utilization by allowing instructions from multiple independent threads to coexist in a processor and compete for shared resources. Previous studies have shown, however, that its throughput may be limited by the number of threads. A reason is that a fixed thread scheduling policy cannot be optimal for the varying mixes of threads it may face in an SMT processor. Our adaptive dynamic thread scheduling (ADTS) was previously proposed to achieve higher utilization by allowing a detector thread to make use of wasted pipeline slots with nominal hardware and software costs. The detector thread adaptively switches between various fetch policies. Our previous study showed that a single fixed thread scheduling policy presents much room (some 30%) for improvement compared to an oracle-scheduled case. In this paper, we take a closer look at ADTS. We implemented the functional model of the ADTS and its software architecture to evaluate various heuristics for determining a better fetch policy for a next scheduling quantum. We report that performance could be improved by as much as 25%. © 2003 IEEE.

关键词： Scheduling

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