arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0902.0347math.STstat.TH
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迭代滤波

Iterated filtering

Edward L. Ionides, Anindya Bhadra, Yves Atchadé, Aaron King

摘要:

部分观测马尔可夫过程模型的推理一直是一个长期存在的方法挑战,许多科学和工程应用。迭代滤波算法通过求解滤波问题的递归序列来最大化部分观测马尔可夫过程模型的似然函数。我们提出了新的理论成果有关的迭代滤波算法的收敛性,通过顺序蒙特卡罗滤波器实现。这一理论补充了越来越多的经验证据,迭代过滤算法提供了一个有效的推理策略的非线性动态系统的科学模型。在我们的理论的第一步涉及研究一种新的递归方法,最大化的似然函数的潜在变量模型,当这种可能性是通过重要性抽样评估。这导致考虑迭代重要性采样算法,其用作迭代滤波的简单特殊情况,并且可能具有其自身的适用性。

英文摘要:

Inference for partially observed Markov process models has been a longstanding methodological challenge with many scientific and engineering applications. Iterated filtering algorithms maximize the likelihood function for partially observed Markov process models by solving a recursive sequence of filtering problems. We present new theoretical results pertaining to the convergence of iterated filtering algorithms implemented via sequential Monte Carlo filters. This theory complements the growing body of empirical evidence that iterated filtering algorithms provide an effective inference strategy for scientific models of nonlinear dynamic systems. The first step in our theory involves studying a new recursive approach for maximizing the likelihood function of a latent variable model, when this likelihood is evaluated via importance sampling. This leads to the consideration of an iterated importance sampling algorithm which serves as a simple special case of iterated filtering, and may have applicability in its own right.

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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