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9th World Multi-Conference on Systemics, Cybernetics and Informatics, WMSCI 2005

作者： Salampasis, Michail Kouroupetroglou, Christos Manitsaris, Athanasios Loutfi, Mohamed Department of Informatics Technology Educational Institute of Thessaloniki Thessaloniki 57 400 Greece Department of Applied Informatics University of Macedonia Thessaloniki Greece School of Computing and Technology University of Sunderland St. Peters Campus Sunderland SR6ODD United Kingdom

ISBN: (纸本)9806560612

Information is one of the most valuable resources in today's society, therefore the process of information seeking in electronic environments is one of the most crucial processes that can help a citizen to achieve a better quality of life. However, access to information in electronic forms is so far difficult for blind people, but new publicly available electronic environments, particularly the World Wide Web (WWW), provide great potential to overcome the difficulties that blind people have in accessing information. In this paper, we present BrowserTree, a specialised voice web browser that we have designed and developed for blind users of the WWW. BrowserTree offers to an unsighted user all the facilities (e.g. make bookmarks, follow links) that a sighted user has using a "normal" web browser. BrowserTree's main difference in comparison to other specialised voice web browsers is our effort to provide a "reading mode" which allows an unsighted user to browse a large WWW document at a "concept" level utilising existing structure of a web page. Using this reading mode the user can acquire quicker a better outlook-overview of the web page under examination.

关键词： Web browsers

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State dependent regenerative delay in milling processes

State dependent regenerative delay in milling processes

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DETC2005: ASME International Design Engineering Technical Conferences and Computers and Information in Engineering Conference

作者： Insperger, Tamás Hartung, Ferenc Stépán, Gábor Turi, Janos Department of Applied Mechanics Budapest University of Technology and Economics H-1521 Budapest Hungary Department of Mathematics and Computing University of Veszprém H-8201 Veszprém Hungary Programs in Mathematical Sciences University of Texas at Dallas Texas United States

ISBN: (纸本)0791847438

Traditional models of regenerative machine tool chatter use constant time delays assuming that the period between two sub-sequent cuts is a constant determined definitely by the spindle speed. These models result in delay-differential equations with constant time delay. If the vibrations of the tool relative to the workpiece are also included in the surface regeneration model, then the resulted time delay is not constant, but it depends on the actual and a delayed position of the tool. In this case, the governing equation is a delay-differential equation with state dependent time delay. Equations with state dependent delays can not be linearized in the traditional sense, but there exists linear equations that can be associated to them. This way, the local behavior of the system with state dependent delays can be investigated. In this study, a two degree of freedom model is presented for milling process. A thorough modeling of the regeneration effect results in the governing delay-differential equation with state dependent time delay. It is shown through the linearization of the nonlinear equation that an additional term arises in the linearized equation of motion due to the state-dependency of the time delay. Copyright © 2005 by ASME.

关键词： Milling (machining)

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Owl: Next generation system monitoring

Owl: Next generation system monitoring

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2005 computing Frontiers Conference

作者： Schulz, Martin Lee, Hsien-Hsin S. White, Brian S. McKee, Sally A. Jeitner, Jürgen Center for Applied Scientific Computing Lawrence Livermore National Laboratory School of Electrical and Computer Engineering Georgia Institute of Technology Computer Systems Lab. Cornell University Department of Informatics Technische Universität München

ISBN: (纸本)1595930183

As microarchitectural and system complexity grows, comprehending system behavior becomes increasingly difficult, and often requires obtaining and sifting through voluminous event traces or coordinating results from multiple, non-localized sources. Owl is a proposed framework that overcomes limitations faced by traditional performance counters and monitoring facilities in dealing with such complexity by pervasively deploying programmable monitoring elements throughout a system. The design exploits reconfigurable or programmable logic to realize hardware monitors located at event sources, such as memory buses. These monitors run and writeback results autonomously with respect to the CPU, mitigating the system impact of interrupt-driven monitoring or the need to communicate irrelevant events to higher levels of the system. The monitors are designed to snoop any kind of system transaction, e.g., within the core, on a bus, across the wire, or within I/O devices. Copyright 2005 ACM.

关键词： Monitoring

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A closed-loop rate-based contention control for optical burst switched networks

A closed-loop rate-based contention control for optical burs...

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GLOBECOM'05: IEEE Global Telecommunications Conference, 2005

作者： Farahmand, Farid Zhang, Qiong Jue, Jason P. Department of Computer Electronics and Graphics Technology Central Connecticut State University New Britain CT 06050 Mathematical Sciences and Applied Computing Arizona State University West United States Department of Computer Science University of Texas at Dallas Richardson TX 75083

ISBN: (纸本)0780394143

In this paper we describe a rate-based OBS network architecture in which core switch nodes send explicit messages to edge nodes requesting them to reduce their transmission rate on congested links. Within this framework, we introduce a new contention avoidance mechanism called proportional control algorithm with explicit reduction request (PCwER). Through source rate control, PCwER proactively attempts to prevent the network from entering the congestion state. Basic building blocks and performance trade-offs of PCwER are the main focus of this paper. In addition, through a simple fluid model we analyze the characteristics of the algorithm. Our simulation results show that the proposed contention avoidance techniques improve the network utilization and reduce the packet loss probability.

关键词： Closed loop control systems

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Large-scale first-principles molecular dynamics simulations on the BlueGene/L platform using the Qbox code 05

Large-scale first-principles molecular dynamics simulations ...

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ACM/IEEE 2005 Supercomputing Conference, SC'05

作者： Gygi, François Yates, Robert K. Lorenz, Juergen Draeger, Erik W. Franchetti, Franz Ueberhuber, Christoph W. Sexton, James C. De Supinski, Bronis R. Kral, Stefan Gunnels, John A. Center for Applied Scientific Computing Lawrence Livermore National Laboratory Livermore CA 94551 Center for Applied Scientific Computing Lawrence Livermore National Laboratory Livermore CA 94550 Institute of Analysis and Scientific Computing Vienna University of Technology Wiedner Hauptstrasse 8 A-1040 Vienna Austria Department of Electrical and Computer Engineering Carnegie Mellon University 5000 Forbes Ave. Pittsburgh PA 15213 IBM T.J. Watson Research Center Yorktown Heights NY 10598

ISBN: (纸本)1595930612

We demonstrate that the Qbox code supports unprecedented large-scale First-Principles Molecular Dynamics (FPMD) applications on the BlueGene/L supercomputer. Qbox is an FPMD implementation specifically designed for large-scale parallel platforms such as BlueGene/L. Strong scaling tests for a Materials Science application show an 86% scaling efficiency between 1024 and 32,768 CPUs. Measurements of performance by means of hardware counters show that 36% of the peak FPU performance can be attained. © 2005 IEEE.

关键词： Natural sciences computing

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An Algorithm for Automatic Content Summarization in Modern Greek Language

An Algorithm for Automatic Content Summarization in Modern G...

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ITI International Conference on Information and Communications technology (ICICT)

作者： G. Mamakis A.G. Malamos A. Axaridou Y. Kaliakatsos A. Ware Department of Applied Informatics and Multimedia Technological Educational Institute of Crete School of Applied Technology Greece Departmant of Electronics Technological Educational Institute of Crete School of Applied Technology Greece School of Computing University of Glamorgan UK

In this paper, basic principles are presented and an algorithm for extracting document content summary for Greek language, by using statistic method. The algorithm presented is based on grammatical rules and semantic information dedicated for Greek language. The algorithm has been tested on a variety of news articles and produces satisfactory results for a variety of thematic subjects. Apart from the algorithm, a test case is presented to validate its performance

关键词： Data mining Educational technology Vocabulary Statistical analysis Informatics History Information technology

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Convergence conditions for random quantum circuits

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Physical Review A 2005年第6期72卷 060302(R)-060302(R)页

作者： Joseph Emerson Etera Livine Seth Lloyd Institute for Quantum Computing and Department of Applied Math University of Waterloo 200 University Avenue West Waterloo Ontario Canada N2L 3G1 Perimeter Institute for Theoretical Physics 31 Caroline Street North Waterloo Ontario Canada N2L 2Y5 Department of Mechanical Engineering Massachusetts Institute of Technology 77 Massachusetts Avenue Cambridge Massachusetts 02139 USA

Efficient methods for generating pseudorandomly distributed unitary operators are needed for the practical application of Haar-distributed random operators in quantum communication and noise estimation protocols. We develop a theoretical framework for analyzing pseudorandom ensembles generated through a random circuit composition. We prove that the measure over random circuits converges exponentially (with increasing circuit length) to the uniform (Haar) measure on the unitary group, though the rate for uniform convergence must decrease exponentially with the number of qubits. We describe how the rate of convergence for test functions associated with specific randomization tasks leads to weaker convergence conditions that may allow efficient random circuit constructions.

关键词： UNITARY OPERATORS INFORMATION STATES NOISE

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Research on extracting medical diagnosis rules based on rough sets theory

Research on extracting medical diagnosis rules based on roug...

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International Conference on Machine Learning and Cybernetics (ICMLC)

作者： Yu-Hui Xu Wei-Jin Jiang Yu-Sheng Xu Department of Information & Computing Science Zhuzhou Institute of Technology Zhuzhou China Department of Computer Zhuzhou Institute of Technology Zhuzhou China College of Mechanical Engineering and Applied Electronics Beijing University of Technology Beijing China

Analysis of how to extract medical diagnosis rules from medical cases. Based on the rough set theory, a way of acquiring knowledge is introduced. Using this theory, we analyze the data, propose some possible rules and reveal an optimized probability formula. The steps of implementation, which includes the continual information discretization system, information reduction system, decision acquirement rules, decision model generation, etc., are explained through case study. In the end, the whole process of knowledge acquirement is discussed, which can effectively solve the choke point problem of acquiring knowledge in the expert system. At the same time, it also provides a new way to solve the application of artificial intelligence technology in the field of medicinal diagnosis.

关键词： Medical diagnosis Rough sets Data mining Medical diagnostic imaging Set theory Data analysis Inductors Medical expert systems Diagnostic expert systems Artificial intelligence

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Research on the nature of reduction to simplifying reduction algorithm

Research on the nature of reduction to simplifying reduction...

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International Conference on Machine Learning and Cybernetics (ICMLC)

作者： Wei-Jin Jiang Yu-Hui Xu Yu-Sheng Xu Department of Computer Zhuzhou Institute of Technology Zhuzhou China Department of Information & Computing Science Zhuzhou Institute of Technology Zhuzhou China College of Mechanical Engineering and Applied Electronics Beijing University of Technology Beijing China

Attribute reduction is often used in simplifying decision table in rough set, but as far as a specific rule is concerned attribute value reduction. In this paper, through analyzing the nature of reduction, we have obt... 详细信息

关键词： Educational institutions Mechanical engineering Algorithm design and analysis Testing Data analysis Knowledge based systems Machine learning Cybernetics Knowledge representation

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Research on reliability evaluation of series systems with optimization algorithm

Research on reliability evaluation of series systems with op...

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International Conference on Machine Learning and Cybernetics (ICMLC)

The failure probability of a system can be expressed as an integral of the joint probability density function within the failure domain defined by the limit state functions of the system. Generally, it is very difficult to solve this integral directly. The evaluation of system reliability has been the active research area. Some methods were developed to solve system reliability analysis, such as Monte Carlo method, importance sampling method, bounding techniques and probability network evaluation technique (PNET). This paper presents the implementation of several optimization algorithms, modified method of feasible direction (MFD), sequential linear programming (SLP) and sequential quadratic programming (SQP), in order to demonstrate the convergence abilities and robust nature of the optimization technique when applied to series system reliability analysis. Examples taken from the published references were calculated and the results were compared with the answers of various other methods and the exact solution. Results indicate the optimization technique has a wide range of application with good convergence ability and robustness, and handle problems under generalized conditions or cases.

关键词： Reliability Monte Carlo methods Optimization methods Robustness Probability density function Linear programming Quadratic programming Algorithm design and analysis Educational institutions Mechanical engineering

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