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arXiv 1909.05201stat.COstat.ME
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自适应连续多尝试大都会的高原建议分布

Plateau Proposal Distributions for Adaptive Component-wise Multiple-Try Metropolis

F. Din-Houn Lau, Sebastian Krumscheid

摘要:

马尔可夫链蒙特卡罗(MCMC)方法是已经成为统计学中常用工具的采样方法,例如用于执行蒙特卡罗积分。由于计算能力的增加,MCMC方法存在许多变化,用于从任意的、可能复杂的目标分布生成样本。MCMC方法的性能主要取决于所使用的所谓建议分布的选择。在本文中,我们介绍了一种新类型的建议分布中使用的MCMC方法,操作组件明智的,每次迭代多次试验。具体来说,这类新的建议分布,称为高原分布,不重叠,从而确保多个试验是从状态空间的不同区域中提取的。此外,高原建议分布允许定制的自适应过程,其适合于具有有效的问题相关状态空间探索和改进的老化特性的马尔可夫链。仿真研究表明,我们的新的MCMC算法优于竞争对手时,从一个复杂的形状,高度相关的组件或多个模式的分布采样。

英文摘要:

Markov chain Monte Carlo (MCMC) methods are sampling methods that have become a commonly used tool in statistics, for example to perform Monte Carlo integration. As a consequence of the increase in computational power, many variations of MCMC methods exist for generating samples from arbitrary, possibly complex, target distributions. The performance of an MCMC method is predominately governed by the choice of the so-called proposal distribution used. In this paper, we introduce a new type of proposal distribution for the use in MCMC methods that operates component-wise and with multiple trials per iteration. Specifically, the novel class of proposal distributions, called Plateau distributions, do not overlap, thus ensuring that the multiple trials are drawn from different regions of the state space. Furthermore, the Plateau proposal distributions allow for a bespoke adaptation procedure that lends itself to a Markov chain with efficient problem dependent state space exploration and improved burn-in properties. Simulation studies show that our novel MCMC algorithm outperforms competitors when sampling from distributions with a complex shape, highly correlated components or multiple modes.

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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