A Bayesian Approach to Estimating Background Flows from a Passive Scalar
A Bayesian Approach to Estimating Background Flows from a Passive Scalar
复制标题
估计被动标量背景流的贝叶斯方法
DOI:
10.1137/19m1267544
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Krometis, Justin
中科院分区:
文献类型:
--
作者:
Borggaard, Jeff;Glatt-Holtz, Nathan;Krometis, Justin
We consider the statistical inverse problem of estimating a background flow field (e.g., of air or water) from the partial and noisy observation of a passive scalar (e.g., the concentration of a solute), a common experimental approach to visualizing complex fluid flows. Here the unknown is a vector field that is specified by a large or infinite number of degrees of freedom. Since the inverse problem is ill-posed, i.e., there may be many or no background flows that match a given set of observations, we regularize it by laying out a functional analytic and Bayesian framework for approaching this problem. In doing so, we leverage substantial recent advances in statistical inference and adjoint methods for infinite-dimensional problems. We then identify interesting example problems that exhibit posterior measures with simple and complex structure. We use these examples to conduct a large-scale benchmark of Markov chain Monte Carlo methods developed in recent years for infinite-dimensional settings. Our results indicate that these methods are capable of resolving complex multimodal posteriors in high dimensions.
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DOI:
10.1103/physreve.72.056314
发表时间:
2005
期刊:
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子:
--
作者:
M. Baiesi;C. Maes
通讯作者:
C. Maes
影响因子:
2.2
作者:
Doucet, A;Godsill, SJ;Robert, CP
通讯作者:
Robert, CP
DOI:
10.1214/11-aap828
发表时间:
2011-03
期刊:
arXiv: Probability
影响因子:
--
作者:
N. Pillai;A. Stuart;Alexandre H. Thi'ery
通讯作者:
N. Pillai;A. Stuart;Alexandre H. Thi'ery
影响因子:
4.6
作者:
Benjamin S. Williams;D. Marteau;J. Gollub
通讯作者:
J. Gollub
影响因子:
2.1
作者:
G. Karch;F. Sadlo;D. Weiskopf;C. Hansen;Guo;T. Ertl
通讯作者:
T. Ertl