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arXiv 1302.4950cs.AI
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基于数量级概率的快速信念更新

Fast Belief Update Using Order-of-Magnitude Probabilities

Rockwell Science Center(罗克韦尔科学中心)

Moises Goldszmidt

摘要:

我们提出了一个算法,称为预测,更新因果网络量化的数量级概率的信念。该算法利用了网络的结构和量化,并提出了一个多项式渐近复杂性。预测表现出保守的行为,因为它总是合理的,但并不总是完整的。我们提供了充分的条件,完整性和目前的算法来测试这些条件和计算一套完整的似是而非的值。我们提出预测作为一种有效的方法来估计概率值,并说明其使用结合两个已知的概率推理算法。最后,我们描述了一个应用程序的预测计划评估,目前的实验结果,并讨论了有关其使用的问题与条件逻辑的信念,并在表征无关。

英文摘要:

We present an algorithm, called Predict, for updating beliefs in causal networks quantified with order-of-magnitude probabilities. The algorithm takes advantage of both the structure and the quantification of the network and presents a polynomial asymptotic complexity. Predict exhibits a conservative behavior in that it is always sound but not always complete. We provide sufficient conditions for completeness and present algorithms for testing these conditions and for computing a complete set of plausible values. We propose Predict as an efficient method to estimate probabilistic values and illustrate its use in conjunction with two known algorithms for probabilistic inference. Finally, we describe an application of Predict to plan evaluation, present experimental results, and discuss issues regarding its use with conditional logics of belief, and in the characterization of irrelevance.

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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