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arXiv 1302.4979cs.AI
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信念网络中的抽象:中间状态在诊断推理中的作用

Abstraction in Belief Networks: The Role of Intermediate States in Diagnostic Reasoning

Institute for Decision Systems Research(决策系统研究所)

Gregory M. Provan

摘要:

贝叶斯信度网络越来越多地被用作诊断推理的知识表示。进行诊断推理的一个简单方法是只表示系统故障和观测值。在本文中,我们研究如何有中间结点-节点以外的故障和观察节点的贝叶斯信念网络的诊断性能的影响。我们对一组用于肝脏和胆汁疾病医学诊断的真实信念网络进行了一系列实验。我们比较了一个两级网络的诊断性能的影响,包括疾病和发现节点与网络模型中间的病理生理疾病状态以及。我们提供了一些理论上的证据之间观察到的抽象的两级网络和完整的网络的差异。

英文摘要:

Bayesian belief networks are bing increasingly used as a knowledge representation for diagnostic reasoning. One simple method for conducting diagnostic reasoning is to represent system faults and observations only. In this paper, we investigate how having intermediate nodes-nodes other than fault and observation nodes affects the diagnostic performance of a Bayesian belief network. We conducted a series of experiments on a set of real belief networks for medical diagnosis in liver and bile disease. We compared the effects on diagnostic performance of a two-level network consisting just of disease and finding nodes with that of a network which models intermediate pathophysiological disease states as well. We provide some theoretical evidence for differences observed between the abstracted two-level network and the full network.

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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