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arXiv 1302.3605cs.AI
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贝叶斯网络中实例的高效枚举

Efficient Enumeration of Instantiations in Bayesian Networks

Microsoft Corporation(微软公司);Recom Technologies(Recom技术公司);NASA Ames Research Center(NASA艾姆斯研究中心)

Sampath Srinivas, Pandurang Nayak

摘要:

在过去的几年中,贝叶斯网络已经被应用于各种各样的问题。应用贝叶斯网络的一个中心问题是找到一个或多个最可能的网络实例。在本文中,我们开发了一个有效的算法,递增枚举的实例贝叶斯网络的概率降序。这种枚举算法可应用于从医学专家系统到基于模型的诊断的各种应用中。从根本上说,我们的算法只是对网络的所有实例化的排序列表执行惰性枚举。这种见解导致了一个非常简洁的算法语句,既容易理解和实现。我们表明,对于单连接的网络,我们的算法生成的下一个实例化的时间多项式的网络的大小。该算法扩展到任意贝叶斯网络使用标准的条件技术。我们经验评估的枚举算法,并证明其实用性。

英文摘要:

Over the past several years Bayesian networks have been applied to a wide variety of problems. A central problem in applying Bayesian networks is that of finding one or more of the most probable instantiations of a network. In this paper we develop an efficient algorithm that incrementally enumerates the instantiations of a Bayesian network in decreasing order of probability. Such enumeration algorithms are applicable in a variety of applications ranging from medical expert systems to model-based diagnosis. Fundamentally, our algorithm is simply performing a lazy enumeration of the sorted list of all instantiations of the network. This insight leads to a very concise algorithm statement which is both easily understood and implemented. We show that for singly connected networks, our algorithm generates the next instantiation in time polynomial in the size of the network. The algorithm extends to arbitrary Bayesian networks using standard conditioning techniques. We empirically evaluate the enumeration algorithm and demonstrate its practicality.

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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