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JCPHY
2011
109views more  JCPHY 2011»
12 years 7 months ago
Fast construction of hierarchical matrix representation from matrix-vector multiplication
We develop a hierarchical matrix construction algorithm using matrixvector multiplications, based on the randomized singular value decomposition of low-rank matrices. The algorith...
Lin Lin, Jianfeng Lu, Lexing Ying
JCPHY
2011
104views more  JCPHY 2011»
12 years 7 months ago
Gaussian beam decomposition of high frequency wave fields using expectation-maximization
A new numerical method for approximating highly oscillatory wave fields as a superposition of Gaussian beams is presented. The method estimates the number of beams and their para...
Gil Ariel, Björn Engquist, Nicolay M. Tanushe...