arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1301.7360cs.AI
收藏

贝叶斯网络边缘和联合信念的混合算法及其复杂性

A Hybrid Algorithm to Compute Marginal and Joint Beliefs in Bayesian Networks and Its Complexity

Mark Bloemeke, Marco Valtorta

摘要:

贝叶斯网络中概率更新的精确算法一般有两种形式。第一种方法涉及使用结构,通常是团树,并执行基于本地消息的计算来提取每个变量的信念。第二类一般算法涉及使用非串行动态规划技术来提取对某些期望的变量组的信任。在本文中,我们提出了一种混合算法的基础上,后者的方法,但拥有检索的能力,在所有单变量的信念。该技术的优点在于,它节省了一个NP难的计算步骤,而不是使用每种类型的一个算法。此外,这种技术再次加强了Jensen和Jensen [JJ 94]的猜想,因为它仍然需要一个单一的NP-困难步骤来建立进行推理的结构,正如我们通过确认Li和D 'Ambrosio [LD 94]证明的OFP的NP-困难。

英文摘要:

There exist two general forms of exact algorithms for updating probabilities in Bayesian Networks. The first approach involves using a structure, usually a clique tree, and performing local message based calculation to extract the belief in each variable. The second general class of algorithm involves the use of non-serial dynamic programming techniques to extract the belief in some desired group of variables. In this paper we present a hybrid algorithm based on the latter approach yet possessing the ability to retrieve the belief in all single variables. The technique is advantageous in that it saves a NP-hard computation step over using one algorithm of each type. Furthermore, this technique re-enforces a conjecture of Jensen and Jensen [JJ94] in that it still requires a single NP-hard step to set up the structure on which inference is performed, as we show by confirming Li and D'Ambrosio's [LD94] conjectured NP-hardness of OFP.

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。

↑