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Iterative aggregation/disaggregation methods for computing some characteristics of Markov chains. II. Fast convergence

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applied NUMERICAL MATHEMATICS 2003年第1期45卷 11-28页

作者： Marek, I Czech Inst Technol Fac Civil Engn Thakurova 7 Prague 16629 Czech Republic

A class of iterative aggregation/disaggregation methods (IAD) for computation of some important characteristics of Markov chains such as stationary probability vectors and mean first passage times matrices is presented and convergence properties of the corresponding algorithms are analyzed. Particular attention is focused on the fast convergence. Some classes of problems are identified for which the IAD methods return exact solutions after one single iteration sweap. (C) 2002 IMACS. Published by Elsevier Science B.V. All rights reserved.

关键词： finite Markov chains stationary probability vectors mean first passage matrix covariance matrix aggregation/disaggregation

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computing the noise figure of most circuits by applying symbolic analysis

Computing the noise figure of most circuits by applying symb...

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45th Midwest symposium on Circuits and Systems (MWSCAS 2002)

作者： Sánchez-López, C Tlelo-Cuautle, E Díaz-Sánchez, A INAOE Mexico City 72840 DF Mexico

A novel method focused on the symbolic computation of Noise Figure (NF) for MOS Transistor (MOST) circuits, is presented. In order to improve the computation time, a pure-nodal-analysis (PNA) method is applied by modeling all the circuit elements using the nullor. To demonstrate the suitability of the proposed method, two illustrative examples are given, where the NF computed using the proposed method, is compared with the simulation results using HSPICE.

关键词： MOSFET devices

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Design and evaluation of a resource selection framework for Grid applications 11

Design and evaluation of a resource selection framework for ...

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11th IEEE International symposium on High Performance Distributed computing (HPDC-11)

作者： Liu, C Yang, LY Foster, I Angulo, D Univ Chicago Dept Comp Sci Chicago IL 60637 USA

ISBN: (纸本)0769516866

While distributed, heterogeneous collections of computers ("Grids") can in principle be used as a computing platform, in practice the problems of first discovering and then organizing resources to meet application requirements are difficult. We present a general-purpose resource selection framework that addresses these problems by defining a resource selection service for locating Grid resources that match application requirements. At the heart of this framework is a simple, but powerful, declarative language based on a technique called set matching, which extends the Condor matchmaking framework to support both single-resource and: multiple-resource selection. This framework also:provide an open interface for loading application-specific mapping modules to personalize the resource selector. We present results obtained when this framework is applied in the context of a computational astrophysics application, Cactus. These results demonstrate the effectiveness of our technique.

关键词： Application software Computer applications Computer science Control systems Distributed computing Grid computing Organizing Processor scheduling Resource management Virtual machining

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Capturing invisible design: Modeling multi-modal interaction in pervasive computing

Capturing invisible design: Modeling multi-modal interaction...

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1st International symposium on Pervasive computing and Applications

作者： Ma, Cuixia Dai, Guozhong Wang, Hongan Chinese Acad Sci Human Computer Interact & Intelligent Informat Pr Inst Software Beijing Peoples R China

ISBN: (纸本)1424403251

As technologies are rapidly evolving in the area of storage, recognition and displays, the vision of multi-modal interaction is positioning the human needs central to pervasive access to services. Users expect better looking interfaces that are also easy to use to improve high efficiency and productivity and to focus on task itself instead of tools as providing the invisibility in pervasive computing. However, it is hard to obtain the right service at the right time naturally.. in the multimedia environment based on current interaction approaches. In this paper, we propose a framework for multi-modal interaction which offers the sketch and speech interactive models without limitation of the diversity and richness of the provided services in the pervasive computing environment. Furthermore, it is applied to describe sample application and shows how it is used to create a new interface with high performance.

关键词： Pervasive computing multi-modal interaction invisible design sketch Context Technology

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SIGNAL INTEGRITY SIMULATION AND ANALYSIS IN HIGH-SPEED INTERCONNECTS BY USING FDTD 3

SIGNAL INTEGRITY SIMULATION AND ANALYSIS IN HIGH-SPEED INTER...

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2002 3rd International symposium on Electromagnetic Compatibility

作者： Li Er-Ping Yuan Wei-Liang Computational Electromagnetics and Electronics Division Institute of High Performance Computing 1 Science Park Road

ISBN: (纸本)0780372778

With the advancements in microelectronics, interests in electromagnetic interference and compatibility in high-speed circuits have greatly increased in engineering community,and applications of computational electromagnetics to electromagnetic interference and compatibility(EMI/EMC) engineering become an emerging ***,via,and crosstalk on interconneciion lines will raise EMI problems in high-speed circuits and shall pay more attentions during design phases for signal *** paper presents signal propagation effect analysis on high-speed interconnection lines between different parts with the finite-difference time-domain *** mechanism and the effectiveness of control measures are examined, which could be applied to the high-speed circuit designs.

关键词： SIGNAL INTEGRITY SIMULATION AND ANALYSIS IN HIGH-SPEED INTERCONNECTS BY USING FDTD

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PAM-Blox II: Design and evaluation of C++ module generation for computing with FPGAs 10

PAM-Blox II: Design and evaluation of C++ module generation ...

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10th Annual IEEE symposium on Field-Programmable Custom computing Machines

作者： Mencer, O Bell Labs Lucent Ctr Comp Sci Murray Hill NJ 07974 USA

ISBN: (纸本)076951801X

This paper explores the implications of integrating flexible module generation into a compiler for FPGAs. The objective is to improve the programmability of FPGAs, or in other words, the productivity of the FPGA programmer. We describe (1) the module generation library PAM-Blox II, the second generation of object-oriented module generators in C++, targeted at computing with FPGAs, and (2) examples of design tradeoffs and performance results using redundant representations for addition and multiplication, and technology mapping of comparison and elementary function evaluation. PAM-Blox II is built on top of a set of extensions to the gate level FPGA design library PamDC to provide a more efficient, portable, scalable, and maintainable module generator library. Using PAM-Blox 11 we demonstrate a simplified interface to bit-level programability. The simplification results from the bottom-up approach and a close coupling of architecture generation, module generation and gate level CAD. The tradeoffs for the module generators are based on trading area for speed and hand-optimizing technology mapping to the specific FPGA technology. As an example, we show that redundant number representations hold one key to unleashing the full potential of reconfigurability on the bit-level. The presented module generators are applied to encryption and compression to show the impact of the bit-level optimizations on application performance.

关键词： Field programmable gate arrays (FPGA)

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Searching for new patterns in cardiovascular data

Searching for new patterns in cardiovascular data

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15th IEEE symposium on Computer-Based Medical Systems (CBMS 2002)

作者： Podgorelec, V Kokol, P Stiglic, MM Univ Maribor FERI Maribor Slovenia

ISBN: (纸本)0769516149

We study the new approach to rules induction from medical datasets with the help of physicians' assessment of the progressing solution in order to find new patterns in the available data. The method for automatic extraction of rules is presented that is based on the evolutionary induction of decision trees and automatic programming. The method is applied to a cardiovascular database, several sets of rules are induced upon different groups of attributes which should possibly reveal the presence of some specific cardiovascular problems in young patients. The obtained rules are assessed by a physician to evaluate the strength of the developed knowledge discovery method.

关键词： Medical computing

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Iterative aggregation/disaggregation methods for computing some characteristics of Markov chains. II. Fast convergence

Iterative aggregation/disaggregation methods for computing s...

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5th IMACS International symposium on Iterative Methods in Scientific computing

作者： Marek, I Czech Inst Technol Fac Civil Engn Thakurova 7 Prague 16629 Czech Republic

关键词： finite Markov chains stationary probability vectors mean first passage matrix covariance matrix aggregation/disaggregation

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A T-Matrix EFIE-PMCHWT Method for computing Electromagnetic Scattering from Composite Conductor-Dielectric Objects

A T-Matrix EFIE-PMCHWT Method for Computing Electromagnetic ...

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International applied-Computational-Electromagnetics-Society symposium (ACES)

作者： Das, Arkaprovo Balasubramanian, Manushanker Werner, Pingjuan L. Werner, Douglas H. Penn State Univ Dept Elect Engn University Pk PA 16802 USA

ISBN: (纸本)9781733509671;9798350362978

The T-matrix (transition matrix) method is a widely used technique for modelling the electromagnetic scattering response from arbitrary shaped and sized scatterers and obstacles (M. I. Mishchenko, L. D. Travis and A. A. Lacis, Scattering, Absorption, and Emission of Light by Small Particles, 1st Ed, Cambridge University Press, 2002). While the technique has been employed for decades within the microwave and optical communities, formulations linking the T -matrix method and Integral Equations (IE) are relatively rare. An integrated formulation that combines the T -matrix method and Integral Equations is essential for testcases where the aspect ratio of the scattering geometry is skewed, or when conventional methods to extract the T -matrix fail. © 2024 The applied Computational Electromagnetics Society.

关键词： Integral equations

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Nitrogen laser output energy measurements 12

Nitrogen laser output energy measurements

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12th IMEKO TC4 International symposium Electrical Measurements and Instrumentation

作者： Pipić, Davor Henč-Bartolić, Višnja Stubičar, Mirko University of Zagreb Faculty of Electrical Engineering and Computing Department of Applied Physics Unska 3 Zagreb Croatia University of Zagreb Faculty of Science Zagreb Croatia

Measurements of the output beam energy of the nitrogen laser were carried out. It is a pulse-operating molecular laser in UV region at a wavelength of λ=337,1 nm, pulse duration of τ=6 ns and output energy of up to 9 mJ, depending on operating conditions. © 2002 International Measurement Confederation (IMEKO). All rights reserved.

关键词： Laser mirrors

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