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arXiv 1302.6826cs.AI
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使用新数据改进贝叶斯网络

Using New Data to Refine a Bayesian Network

University of Waterloo(滑铁卢大学)

Wai Lam, Fahiem Bacchus

摘要:

我们探讨的问题,完善现有的贝叶斯网络结构,使用新的数据可能只提到一个子集的变量。大多数以前的工作只考虑了网络的条件概率参数的细化,并没有解决细化网络结构的问题。我们开发了一种新的方法来细化网络的结构。我们的方法是基于最小描述长度(MDL)的原则,它采用了适应版本的贝叶斯网络学习算法在我们以前的工作。所需的调整之一是修改以前的算法,以考虑现有网络的结构。该学习算法生成部分网络结构,然后可以使用该部分网络结构来改进现有网络。我们还提出了实验证据证明我们的方法的有效性。

英文摘要:

We explore the issue of refining an existent Bayesian network structure using new data which might mention only a subset of the variables. Most previous works have only considered the refinement of the network's conditional probability parameters, and have not addressed the issue of refining the network's structure. We develop a new approach for refining the network's structure. Our approach is based on the Minimal Description Length (MDL) principle, and it employs an adapted version of a Bayesian network learning algorithm developed in our previous work. One of the adaptations required is to modify the previous algorithm to account for the structure of the existent network. The learning algorithm generates a partial network structure which can then be used to improve the existent network. We also present experimental evidence demonstrating the effectiveness of our approach.

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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