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arXiv 1302.3549cs.AI
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信度网络中最小d-分离集的一种算法

An Algorithm for Finding Minimum d-Separating Sets in Belief Networks

Universidad de Granada(格拉纳达大学)

Silvia Acid, Luis M. de Campos

摘要:

在有向无环图(dags)中,检验图的独立性常用的准则是著名的d-分离准则。它允许我们以信念网络的形式构建依赖模型(通常是概率依赖模型)的图形表示,这使得独立关系的解释和管理变得可能,而无需参考数值参数(条件概率)。本文研究了如下组合问题:求dag中两个结点的最小d-分离集。这个集合将表示防止这两个节点相互影响所需的最小信息(在最小变量数量的意义上)。这个基本问题的解决方案和它的一些扩展可以在几个方面是有用的,我们将在后面看到。我们的解决方案是基于一个两步的过程:首先,我们减少了原来的问题,找到一个最小的分离集在一个无向图中的一个简单的,第二,我们开发了一个算法来解决它。

英文摘要:

The criterion commonly used in directed acyclic graphs (dags) for testing graphical independence is the well-known d-separation criterion. It allows us to build graphical representations of dependency models (usually probabilistic dependency models) in the form of belief networks, which make easy interpretation and management of independence relationships possible, without reference to numerical parameters (conditional probabilities). In this paper, we study the following combinatorial problem: finding the minimum d-separating set for two nodes in a dag. This set would represent the minimum information (in the sense of minimum number of variables) necessary to prevent these two nodes from influencing each other. The solution to this basic problem and some of its extensions can be useful in several ways, as we shall see later. Our solution is based on a two-step process: first, we reduce the original problem to the simpler one of finding a minimum separating set in an undirected graph, and second, we develop an algorithm for solving it.

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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