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arXiv cs/0305017cs.AIcs.NE
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Dempster-Shafer理论中的规范化技术

Cluster-based Specification Techniques in Dempster-Shafer Theory

Johan Schubert

摘要:

在不确定性推理中,有许多情况下,证据不仅不确定,而且它们的命题也可能是弱指定的,因为它可能不确定命题所指的是哪个事件。因此,至关重要的是,不要错误地认为这些证据指的是同一事件。如果证据可以被聚类成代表应该被单独处理的事件的子集,这种情况将变得可管理。在前面的文章中,我们在Dempster-Shafer理论中建立了一个标准函数,称为元冲突函数。有了这个标准,我们可以划分成子集的证据集。每个子集代表一个单独的事件。在这篇文章中,我们不仅会为每一个证据找到最合理的子集,我们还将为每个子集找到证据属于该子集的可能性。此外,当子集的数量是不确定的,我们的目标是找到一个后验概率分布的子集的数量。

英文摘要:

When reasoning with uncertainty there are many situations where evidences are not only uncertain but their propositions may also be weakly specified in the sense that it may not be certain to which event a proposition is referring. It is then crucial not to combine such evidences in the mistaken belief that they are referring to the same event. This situation would become manageable if the evidences could be clustered into subsets representing events that should be handled separately. In an earlier article we established within Dempster-Shafer theory a criterion function called the metaconflict function. With this criterion we can partition a set of evidences into subsets. Each subset representing a separate event. In this article we will not only find the most plausible subset for each piece of evidence, we will also find the plausibility for every subset that the evidence belongs to the subset. Also, when the number of subsets are uncertain we aim to find a posterior probability distribution regarding the number of subsets.

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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