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» Symbolic and Numeric Methods for Exploiting Structure in Con...

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MMAS
2011
Springer

182views Intelligent Agents» more MMAS 2011»

Sweeping Preconditioner for the Helmholtz Equation: Moving Perfectly Matched Layers

12 years 10 months ago

Download www.math.utexas.edu

This paper introduces a new sweeping preconditioner for the iterative solution of the variable coeﬃcient Helmholtz equation in two and three dimensions. The algorithms follow th...

Björn Engquist, Lexing Ying

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VALUETOOLS
2006
ACM

162views Hardware» more VALUETOOLS 2006»

Fast solvers for queueing systems with negative customers

14 years 1 months ago

Download hkumath.hku.hk

In this paper, we are interested in solving Markovian queueing systems having Poisson batch arrivals, exponential servers and negative customers. Preconditioned conjugate gradient...

You-Wei Wen, Wai-Ki Ching, Michael K. Ng

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QEST
2008
IEEE

145views Modeling and Simulation» more QEST 2008»

Quasi-Birth-Death Processes, Tree-Like QBDs, Probabilistic 1-Counter Automata, and Pushdown Systems

14 years 1 months ago

Download www.era.lib.ed.ac.uk

We begin by observing that (discrete-time) QuasiBirth-Death Processes (QBDs) are equivalent, in a precise sense, to (discrete-time) probabilistic 1-Counter Automata (p1CAs), and b...

Kousha Etessami, Dominik Wojtczak, Mihalis Yannaka...

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