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arXiv 1405.3175cs.AI
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D数论:Dempster-Shafer证据理论的推广

D numbers theory: a generalization of Dempster-Shafer evidence theory

Southwest University(西南大学);Vanderbilt University(范德堡大学)

Yong Deng

摘要:

对现实世界中不确定信息的有效建模仍然是一个悬而未决的问题。Dempster-Shafer证据理论是最常用的方法之一。然而,Dempster-Shafer证据理论有一个假设,即识别框架中的假设是相互排斥的。在实际应用中,特别是在语言决策中,由于语言变量本质上并不相互排斥,这一条件可能被违反。在本文中,一个新的理论,称为D数论(DNT),是系统地发展来解决这个问题。给出了两个D数的组合规则。定义了一个系数来衡量识别框架中假设之间的排他性程度。给出了两个D数的组合规则。如果互斥系数为1,即识别框架中的假设完全互斥,则D组合退化为经典的Dempster组合规则。最后,提出了一种D数的语言变量转换方法,用于决策。语言证据决策的一个数值例子被用来说明所提出的D数理论的有效性。

英文摘要:

Efficient modeling of uncertain information in real world is still an open issue. Dempster-Shafer evidence theory is one of the most commonly used methods. However, the Dempster-Shafer evidence theory has the assumption that the hypothesis in the framework of discernment is exclusive of each other. This condition can be violated in real applications, especially in linguistic decision making since the linguistic variables are not exclusive of each others essentially. In this paper, a new theory, called as D numbers theory (DNT), is systematically developed to address this issue. The combination rule of two D numbers is presented. An coefficient is defined to measure the exclusive degree among the hypotheses in the framework of discernment. The combination rule of two D numbers is presented. If the exclusive coefficient is one which means that the hypothesis in the framework of discernment is exclusive of each other totally, the D combination is degenerated as the classical Dempster combination rule. Finally, a linguistic variables transformation of D numbers is presented to make a decision. A numerical example on linguistic evidential decision making is used to illustrate the efficiency of the proposed D numbers theory.

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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