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 1301.6748cs.AI
收藏

贝叶斯网络中的上下文弱独立性

Contextual Weak Independence in Bayesian Networks

University of Regina(里贾纳大学)

Michael S. K. M. Wong, C. J. Butz

摘要:

众所周知,(强)条件独立性(CI)的概念限制性太强,无法捕获仅在某些上下文中成立的独立性。这种上下文独立性,称为上下文强独立性(CSI),可以用来促进概率知识的获取,表示和推理。在本文中,我们建议在贝叶斯网络中使用上下文弱独立性(CWI)。应该强调的是,CWI的概念是比CSI更一般的上下文独立性形式。此外,如果上下文强独立性对所有上下文都成立,则CSI的概念成为强CI。另一方面,如果弱语境独立性对所有语境都成立,那么CWI的概念就成为弱独立性(WI)n,这是一种比强CI更一般的非语境独立性。更重要的是,完整的公理化研究的类WI和类CI和WI一起。最后,一个有趣的属性WI是一个必要和充分条件,以确保一致性的粒度概率网络。

英文摘要:

It is well-known that the notion of (strong) conditional independence (CI) is too restrictive to capture independencies that only hold in certain contexts. This kind of contextual independency, called context-strong independence (CSI), can be used to facilitate the acquisition, representation, and inference of probabilistic knowledge. In this paper, we suggest the use of contextual weak independence (CWI) in Bayesian networks. It should be emphasized that the notion of CWI is a more general form of contextual independence than CSI. Furthermore, if the contextual strong independence holds for all contexts, then the notion of CSI becomes strong CI. On the other hand, if the weak contextual independence holds for all contexts, then the notion of CWI becomes weak independence (WI) nwhich is a more general noncontextual independency than strong CI. More importantly, complete axiomatizations are studied for both the class of WI and the class of CI and WI together. Finally, the interesting property of WI being a necessary and sufficient condition for ensuring consistency in granular probabilistic networks is shown.

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。

↑