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arXiv 1304.1503cs.AI
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区间影响图

Interval Influence Diagrams

Rockwell International Science Center Palo Alto Laboratory(罗克韦尔国际科学中心帕洛阿尔托实验室)

Kenneth W. Fertig, John S. Breese

摘要:

我们描述了一种机制,用于执行概率推理的影响图使用区间,而不是点值的概率。我们得出的程序节点删除(对应于条件期望)和弧反转(对应于贝叶斯条件)的影响图中的概率下限存储在每个节点。所得到的界限变换图中示出的是最佳的一类约束的概率分布,可以表示为专门的组件的概率图的下限。可以执行这些操作的序列来回答输入中具有不确定性的概率查询,并对影响图执行敏感性分析。这种方法的存储要求和计算复杂性与点值概率推理机制的存储要求和计算复杂性相当,使得该方法对于执行灵敏度分析和概率信息不可用的情况具有吸引力。有限的经验数据的方法的实施提供。

英文摘要:

We describe a mechanism for performing probabilistic reasoning in influence diagrams using interval rather than point valued probabilities. We derive the procedures for node removal (corresponding to conditional expectation) and arc reversal (corresponding to Bayesian conditioning) in influence diagrams where lower bounds on probabilities are stored at each node. The resulting bounds for the transformed diagram are shown to be optimal within the class of constraints on probability distributions that can be expressed exclusively as lower bounds on the component probabilities of the diagram. Sequences of these operations can be performed to answer probabilistic queries with indeterminacies in the input and for performing sensitivity analysis on an influence diagram. The storage requirements and computational complexity of this approach are comparable to those for point-valued probabilistic inference mechanisms, making the approach attractive for performing sensitivity analysis and where probability information is not available. Limited empirical data on an implementation of the methodology are provided.

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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