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arXiv math/0605263math.STstat.TH
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通过熵收敛准则选择MCMC仿真策略

Selection of a MCMC simulation strategy via an entropy convergence criterion

Didier Chauveau, Pierre Vandekerkhove

摘要:

在MCMC方法中,例如Metropolis-Hastings(MH)算法,Gibbs采样器或最近的自适应方法,可以提出许多不同的策略,通常在实践中与未知的收敛速度相关联。在本文中,我们提出了一种基于模拟的方法来比较这些收敛速度,接地熵标准计算并行(i.i.d.)模拟的马尔可夫链来自每个候选策略。我们的标准在第一次迭代时确定候选人中的最佳策略。理论上,我们给出了MH算法的一般条件,使其连续密度满足足够的光滑性和尾部性质,从而使这个熵准则可以用核密度估计和Monte Carlo积分一致地估计.仿真例子来说明这种收敛性准则。

英文摘要:

In MCMC methods, such as the Metropolis-Hastings (MH) algorithm, the Gibbs sampler, or recent adaptive methods, many different strategies can be proposed, often associated in practice to unknown rates of convergence. In this paper we propose a simulation-based methodology to compare these rates of convergence, grounded on an entropy criterion computed from parallel (i.i.d.) simulated Markov chains coming from each candidate strategy. Our criterion determines on the very first iterations the best strategy among the candidates. Theoretically, we give for the MH algorithm general conditions under which its successive densities satisfy adequate smoothness and tail properties, so that this entropy criterion can be estimated consistently using kernel density estimate and Monte Carlo integration. Simulated examples are provided to illustrate this convergence criterion.

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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