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arXiv 1302.4943cs.AI
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信念网络的概率启发:结合定性和定量信息

Elicitation of Probabilities for Belief Networks: Combining Qualitative and Quantitative Information

University of Pittsburgh(匹兹堡大学);Utrecht University(乌得勒支大学)

Marek J. Druzdzel, Linda C. van der Gaag

摘要:

虽然信念网络在不确定性推理中的有用性被广泛接受,但获得它们所需的数值概率仍然被认为是一个主要障碍。通常没有足够的统计数据来进行可靠的概率估计。可用信息可能不直接适合在网络中编码。最后,领域专家可能不愿意提供数值概率。在本文中,我们提出了一种方法,从一个领域的专家,是非侵入性的,并容纳任何概率信息的专家愿意国家的概率启发。我们表示所有可用的信息,无论是定性或定量的性质,在一个规范的形式组成的(中)等式表示约束的超空间可能的联合概率分布。然后,我们使用这个标准形式来推导出所需概率的二阶概率分布。

英文摘要:

Although the usefulness of belief networks for reasoning under uncertainty is widely accepted, obtaining numerical probabilities that they require is still perceived a major obstacle. Often not enough statistical data is available to allow for reliable probability estimation. Available information may not be directly amenable for encoding in the network. Finally, domain experts may be reluctant to provide numerical probabilities. In this paper, we propose a method for elicitation of probabilities from a domain expert that is non-invasive and accommodates whatever probabilistic information the expert is willing to state. We express all available information, whether qualitative or quantitative in nature, in a canonical form consisting of (in) equalities expressing constraints on the hyperspace of possible joint probability distributions. We then use this canonical form to derive second-order probability distributions over the desired probabilities.

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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