Bayesian uncertainty estimation for full waveform inversion: A numerical study

Bayesian uncertainty estimation for full waveform inversion: A numerical study
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全波形反演的贝叶斯不确定性估计:数值研究

DOI:
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发表时间:
2019
期刊:
SEG technical program expanded abstracts
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通讯作者:
D. Peter
D. Peter
中科院分区:
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文献类型:
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作者:
M. Izzatullah;T. Leeuwen;D. Peter

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全波形反演使我们能够获得高分辨率的地下图像。然而,估计相关的不确定性并不是微不足道的。基于Hessian的方法为我们提供了一个基于Hessian的逆来评估给定估计周围的不确定性的机会,在该估计处进行评估。在这项工作中,我们研究了各种算法提取信息,从这个逆海森的基础上低秩近似。特别是,我们比较Lanczos方法的随机奇异值分解。我们证明了低秩近似可能导致有偏的结论。
Full waveform inversion enables us to obtain high-resolution subsurface images. However, estimating the associated uncertainties is not trivial. Hessian-based method gives us an oppor-tunity to assess the uncertainties around a given estimate based on the inverse of the Hessian, evaluated at that estimate. In this work we study various algorithms for extracting information from this inverse Hessian based on a low-rank approximation. In particular, we compare the Lanczos method to the randomized singular value decomposition. We demonstrate that the low-rank approximation may lead to a biased conclusion.
DOI: --
发表时间: 2012
期刊: --
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作者:
P. Martinsson;N. Halko
通讯作者: P. Martinsson;N. Halko