arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1801.01243stat.COq-fin.CP
收藏

使用阻尼BFGS更新构造Metropolis-Hastings方案

Constructing Metropolis-Hastings proposals using damped BFGS updates

Johan Dahlin, Adrian Wills, Brett Ninness

摘要:

在系统辨识中,根据观测到的系统性能数据计算系统参数及其函数的贝叶斯估计是一个常见的问题。这是一个以前研究的问题,随机模拟方法已被检查使用流行的大都市-黑斯廷斯(MH)算法。该先前的研究已经确定了调整{proposal}分布的公认困难,使得MH方法提供具有充分混合的实现以提供有效收敛。本文提出了一种调整建议的方法,并以经验为基础进行了研究,该方法使用了从数值优化文献中借来的思想,围绕Hessians的有效计算,以便将目标后验的梯度和曲率信息纳入建议中。

英文摘要:

The computation of Bayesian estimates of system parameters and functions of them on the basis of observed system performance data is a common problem within system identification. This is a previously studied issue where stochastic simulation approaches have been examined using the popular Metropolis--Hastings (MH) algorithm. This prior study has identified a recognised difficulty of tuning the {proposal distribution so that the MH method provides realisations with sufficient mixing to deliver efficient convergence. This paper proposes and empirically examines a method of tuning the proposal using ideas borrowed from the numerical optimisation literature around efficient computation of Hessians so that gradient and curvature information of the target posterior can be incorporated in the proposal.

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。

↑