Particle Learning and Smoothing

Particle Learning and Smoothing
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DOI:
10.1214/10-sts325
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发表时间:
2010-02-01
影响因子:
5.7
通讯作者:
Polson, Nicholas G.
Polson, Nicholas G.
中科院分区:
数学2区
文献类型:
--
作者:
Carvalho, Carlos M.;Johannes, Michael S.;Polson, Nicholas G.

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粒子学习(PL)提供了状态滤波,序贯参数学习和平滑的一般类的状态空间模型。我们的方法扩展了现有的粒子方法,通过一个完全适应的过滤器,利用条件充分的统计参数和/或状态作为粒子的静态参数的估计。在参数不确定性的存在下,状态平滑也解决了PL的副产品。在许多示例中,我们表明PL优于现有的粒子过滤替代方案,并被证明是MCMC的竞争对手。
Particle learning (PL) provides state filtering, sequential parameter learning and smoothing in a general class of state space models. Our approach extends existing particle methods by incorporating the estimation of static parameters via a fully-adapted filter that utilizes conditional sufficient statistics for parameters and/or states as particles. State smoothing in the presence of parameter uncertainty is also solved as a by-product of PL. In a number of examples, we show that PL outperforms existing particle filtering alternatives and proves to be a competitor to MCMC.