arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0907.5322math.STmath.FAstat.TH
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关于统计反问题中的infinite-dimensional递阶概率模型

On infinite-dimensional hierarchical probability models in statistical inverse problems

Tapio Helin

摘要:

本文研究了用贝叶斯方法求解一个统计反问题$M = AU+\mathcal{E}$,其中$U$是单位圆$\mathbb{T}$上的函数,即,周期性信号。映射$A$是平滑线性算子,而$\mathcal{E}$是高斯噪声。连接到有限维计算模型$M_{kn} = A_k U_n + \mathcal{E}_k$的解决方案进行了讨论。此外,一个新的分层先验模型,以获得边缘保持条件均值估计。研究了该方法在精细离散下的收敛性,证明了后验分布弱收敛。最后,通过数值例子与模拟数据的理论研究结果进行了说明。

英文摘要:

In this article, the solution of a statistical inverse problem $M = AU+\mathcal{E}$ by the Bayesian approach is studied where $U$ is a function on the unit circle $\mathbb{T}$, i.e., a periodic signal. The mapping $A$ is a smoothing linear operator and $\mathcal{E}$ a Gaussian noise. The connection to the solution of a finite-dimensional computational model $M_{kn} = A_k U_n + \mathcal{E}_k$ is discussed. Furthermore, a novel hierarchical prior model for obtaining edge-preserving conditional mean estimates is introduced. The convergence of the method with respect to finer discretization is studied and the posterior distribution is shown to converge weakly. Finally, theoretical findings are illustrated by a numerical example with simulated data.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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