Optimal experimental design under irreducible uncertainty for linear inverse problems governed by PDEs
Optimal experimental design under irreducible uncertainty for linear inverse problems governed by PDEs
复制标题
由偏微分方程控制的线性反问题的不可约不确定性下的最优实验设计
DOI:
10.1088/1361-6420/ab89c5
复制
发表时间:
2020
期刊:
影响因子:
2.1
通讯作者:
Stadler, Georg
中科院分区:
文献类型:
--
作者:
Koval, Karina;Alexanderian, Alen;Stadler, Georg
We present a method for computing A-optimal sensor placements for infinite-dimensional Bayesian linear inverse problems governed by PDEs with irreducible model uncertainties. Here, irreducible uncertainties refers to uncertainties in the model that exist in addition to the parameters in the inverse problem, and that cannot be reduced through observations. Specifically, given a statistical distribution for the model uncertainties, we compute the optimal design that minimizes the expected value of the posterior covariance trace. The expected value is discretized using Monte Carlo leading to an objective function consisting of a sum of trace operators and a binary-inducing penalty. Minimization of this objective requires a large number of PDE solves in each step. To make this problem computationally tractable, we construct a composite low-rank basis using a randomized range finder algorithm to eliminate forward and adjoint PDE solves. We also present a novel formulation of the A-optimal design objective that requires the trace of an operator in the observation rather than the parameter space. The binary structure is enforced using a weighted regularized ℓ 0-sparsification approach. We present numerical results for inference of the initial condition in a subsurface flow problem with inherent uncertainty in the flow fields and in the initial times.
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影响因子:
2.1
作者:
Neitzel,Ira;Pieper,Konstantin;Walter,Daniel
通讯作者:
Walter,Daniel
影响因子:
2.1
作者:
Haber, E.;Horesh, L.;Tenorio, L.
通讯作者:
Tenorio, L.
影响因子:
3
作者:
D. Kouri;A. Shapiro
通讯作者:
A. Shapiro
影响因子:
3.1
作者:
Ruthotto, Lars;Chung, Julianne;Chung, Matthias
通讯作者:
Chung, Matthias
DOI:
10.3934/ipi.2018045
发表时间:
2016
期刊:
arXiv: Methodology
影响因子:
--
作者:
Y. Daon;G. Stadler
通讯作者:
G. Stadler