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arXiv 1206.0918cs.AI
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基于可能必要贝叶斯网络的模糊知识表示

Fuzzy Knowledge Representation Based on Possibilistic and Necessary Bayesian Networks

Abdelkader Heni, Mohamed Nazih Omri, Adel Alimi

摘要:

在本文提出的框架内,我们解决的问题,扩展某些网络的模糊某些网络,以应付现有模型的不精确和不确定的知识下的决策的复杂性和局限性。本文提出了一个框架,结合两个学科发挥各自的优势,在不确定和不精确的知识表示问题。该框架是一个基于可能性逻辑的框架,其中贝叶斯节点及其属性由局部必要值知识库表示。属性中的数据被解释为一组赋值公式。在我们的贡献可能性贝叶斯网络有一个定性的部分和定量的一部分,代表当地的知识库。总体思路是研究如何融合这两种形式主义将允许表示紧凑的方式来有效地解决问题的知识表示。我们展示了如何将可能性和必要性度量应用于大规模数据的知识表示问题。另一方面,将明确的确定性程度模糊化为模糊变量,提高了网络的质量,并往往带来网络性能的平滑性和鲁棒性。总体目标是提供一种新的不确定性决策方法,该方法结合了三种方法:贝叶斯网络确定性分布和模糊逻辑。

英文摘要:

Within the framework proposed in this paper, we address the issue of extending the certain networks to a fuzzy certain networks in order to cope with a vagueness and limitations of existing models for decision under imprecise and uncertain knowledge. This paper proposes a framework that combines two disciplines to exploit their own advantages in uncertain and imprecise knowledge representation problems. The framework proposed is a possibilistic logic based one in which Bayesian nodes and their properties are represented by local necessity-valued knowledge base. Data in properties are interpreted as set of valuated formulas. In our contribution possibilistic Bayesian networks have a qualitative part and a quantitative part, represented by local knowledge bases. The general idea is to study how a fusion of these two formalisms would permit representing compact way to solve efficiently problems for knowledge representation. We show how to apply possibility and necessity measures to the problem of knowledge representation with large scale data. On the other hand fuzzification of crisp certainty degrees to fuzzy variables improves the quality of the network and tends to bring smoothness and robustness in the network performance. The general aim is to provide a new approach for decision under uncertainty that combines three methodologies: Bayesian networks certainty distribution and fuzzy logic.

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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