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arXiv 1209.3628math.STstat.TH
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白噪声模型反问题自适应推断的贝叶斯方法

Bayes procedures for adaptive inference in inverse problems for the white noise model

B. T. Knapik, B. T. Szabó, A. W. van der Vaart, J. H. van Zanten

摘要:

我们研究经验和层次贝叶斯方法估计一个无限维的参数在轻度不适定的反问题的问题。我们考虑一类由超参数量化正则性的先验分布。我们证明,这两种方法,我们认为成功地自动选择这个参数最佳,导致最佳的收敛速度的真理与Sobolev或分析“平滑”,而不使用知识的规律性。这两种方法都通过仿真实例进行了说明。

英文摘要:

We study empirical and hierarchical Bayes approaches to the problem of estimating an infinite-dimensional parameter in mildly ill-posed inverse problems. We consider a class of prior distributions indexed by a hyperparameter that quantifies regularity. We prove that both methods we consider succeed in automatically selecting this parameter optimally, resulting in optimal convergence rates for truths with Sobolev or analytic "smoothness", without using knowledge about this regularity. Both methods are illustrated by simulation examples.

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