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arXiv 1302.6793cs.AI
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贝叶斯信度网推理的分层模拟方案

A Stratified Simulation Scheme for Inference in Bayesian Belief Networks

Utrecht University(乌得勒支大学)

Remco R. Bouckaert

摘要:

贝叶斯信念网络中概率推理的模拟方案提供了许多优于精确算法的优点;例如,这些方案具有线性和可预测的运行时间,而精确算法具有指数运行时间。实验表明,似然加权是最有前途的模拟方案之一。在本文中,我们提出了一种新的模拟方案,产生的样本更均匀地分布在样本空间比似然加权方案。我们从理论和实验上表明,分层方案优于似然加权平均运行时间和错误的信念估计。

英文摘要:

Simulation schemes for probabilistic inference in Bayesian belief networks offer many advantages over exact algorithms; for example, these schemes have a linear and thus predictable runtime while exact algorithms have exponential runtime. Experiments have shown that likelihood weighting is one of the most promising simulation schemes. In this paper, we present a new simulation scheme that generates samples more evenly spread in the sample space than the likelihood weighting scheme. We show both theoretically and experimentally that the stratified scheme outperforms likelihood weighting in average runtime and error in estimates of beliefs.

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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