A Multiscale Strategy for Bayesian Inference Using Transport Maps
A Multiscale Strategy for Bayesian Inference Using Transport Maps
复制标题
使用传输图进行贝叶斯推理的多尺度策略
DOI:
10.1137/15m1032478
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发表时间:
2015
期刊:
影响因子:
--
通讯作者:
Y. Marzouk
中科院分区:
文献类型:
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作者:
M. Parno;T. El;Y. Marzouk
In many inverse problems, model parameters cannot be precisely determined from observational data. Bayesian inference provides a mechanism for capturing the resulting parameter uncertainty, but typically at a high computational cost. This work introduces a multiscale decomposition that exploits conditional independence across scales, when present in certain classes of inverse problems, to decouple Bayesian inference into two stages: (1) a computationally tractable coarse-scale inference problem, and (2) a mapping of the low-dimensional coarse-scale posterior distribution into the original high-dimensional parameter space. This decomposition relies on a characterization of the non-Gaussian joint distribution of coarse- and fine-scale quantities via optimal transport maps. We demonstrate our approach on a sequence of inverse problems arising in subsurface flow, using the multiscale finite element method to discretize the steady state pressure equation. We compare the multiscale strategy with full-dimensiona...
DOI:
10.1002/9780470685853
发表时间:
1994
期刊:
--
影响因子:
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作者:
L. Biegler;G. Biros;O. Ghattas;M. Heinkenschloss;D. Keyes;B. Mallick;Y. Marzouk;L. Tenorio;B. V. B. Waanders-B.-V.-B.-Waanders-1863062;K. Willcox
通讯作者:
L. Biegler;G. Biros;O. Ghattas;M. Heinkenschloss;D. Keyes;B. Mallick;Y. Marzouk;L. Tenorio;B. V. B. Waanders-B.-V.-B.-Waanders-1863062;K. Willcox