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arXiv 0812.1484stat.COstat.ME
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平行分层抽样:贝叶斯模型选择的一种实用多链抽样方法

Parallel hierarchical sampling: a practical multiple-chains sampler for Bayesian model selection

Fabio Rigat

摘要:

本文介绍了并行分层采样器(PHS),一种同时使用多个链的马尔可夫链蒙特卡罗算法。说明了PHS与并行回火(PT)算法之间的联系,证明了PHS联合转移核的收敛性,强调了PHS联合转移核的实用优势。我们说明了使用PHS,并行回火和梅特罗波利斯-黑斯廷斯算法的贝叶斯模型选择问题,即高斯聚类,协变量的选择线性回归模型和选择的结构树生存模型的推断。

英文摘要:

This paper introduces the parallel hierarchical sampler (PHS), a Markov chain Monte Carlo algorithm using several chains simultaneously. The connections between PHS and the parallel tempering (PT) algorithm are illustrated, convergence of PHS joint transition kernel is proved and and its practical advantages are emphasized. We illustrate the inferences obtained using PHS, parallel tempering and the Metropolis-Hastings algorithm for three Bayesian model selection problems, namely Gaussian clustering, the selection of covariates for a linear regression model and the selection of the structure of a treed survival model.

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