Efficient low-rank approximation of the stochastic Galerkin matrix in tensor formats
Efficient low-rank approximation of the stochastic Galerkin matrix in tensor formats
复制标题
张量格式随机伽辽金矩阵的高效低秩逼近
DOI:
10.1016/j.camwa.2012.10.008
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发表时间:
2014
期刊:
影响因子:
--
通讯作者:
P. Wähnert
中科院分区:
文献类型:
--
作者:
M. Espig;W. Hackbusch;A. Litvinenko;H. G. Matthies;P. Wähnert
In this article, we describe an efficient approximation of the stochastic Galerkin matrix which stems from a stationary diffusion equation. The uncertain permeability coefficient is assumed to be a log-normal random field with given covariance and mean functions. The approximation is done in the canonical tensor format and then compared numerically with the tensor train and hierarchical tensor formats. It will be shown that under additional assumptions the approximation error depends only on the smoothness of the covariance function and does not depend either on the number of random variables nor the degree of the multivariate Hermite polynomials.
DOI:
10.1007/978-3-642-31703-3_2
发表时间:
2013
期刊:
影响因子:
--
作者:
M. Espig;W. Hackbusch;A. Litvinenko;H. G. Matthies;E. Zander
通讯作者:
E. Zander
DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
Mike Espig;L. Grasedyck;W. Hackbusch
通讯作者:
W. Hackbusch