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arXiv 0904.2207stat.MEgr-qcphysics.data-anstat.AP
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多峰分布有效马尔可夫链蒙特卡罗抽样的延迟拒绝格式

Delayed rejection schemes for efficient Markov-Chain Monte-Carlo sampling of multimodal distributions

Miquel Trias, Alberto Vecchio, John Veitch

摘要:

在各种领域中的许多问题的特征在于具有多模态结构的目标分布,其中几个孤立的局部最大值的存在显著地降低了马尔可夫链蒙特卡罗采样算法的效率。已经提出了几种解决方案,如模拟回火或使用平行链,以促进相关参数空间的探索。它们提供了有效的策略的情况下,其中的参数空间的尺寸是小的和/或计算成本不是一个限制因素。然而,这些方法失败的情况下,高维空间的多峰结构是由退化的参数空间的区域之间。在本文中,我们提出了一个完全马尔可夫的方式来有效地采样这种分布的基础上一般延迟拒绝计划与任意数量的步骤,并提供了一个有效的数值实现算法的细节。

英文摘要:

A number of problems in a variety of fields are characterised by target distributions with a multimodal structure in which the presence of several isolated local maxima dramatically reduces the efficiency of Markov Chain Monte Carlo sampling algorithms. Several solutions, such as simulated tempering or the use of parallel chains, have been proposed to facilitate the exploration of the relevant parameter space. They provide effective strategies in the cases in which the dimension of the parameter space is small and/or the computational costs are not a limiting factor. These approaches fail however in the case of high-dimensional spaces where the multimodal structure is induced by degeneracies between regions of the parameter space. In this paper we present a fully Markovian way to efficiently sample this kind of distribution based on the general Delayed Rejection scheme with an arbitrary number of steps, and provide details for an efficient numerical implementation of the algorithm.

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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