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arXiv 1906.11409cs.AI
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Dempster-Shafer理论的推广:一个复杂的信念函数

Generalization of Dempster-Shafer theory: A complex belief function

Southwest University(西南大学)

Fuyuan Xiao

摘要:

证据理论由于其在不需要先验信息的情况下对不确定性建模的灵活性和有效性,在各个领域得到了广泛的应用。然而,现有的证据理论是不足以考虑的情况下,它没有能力表达的数据在其执行过程中的给定阶段的时间的波动,以及不可避免地涉及到数据的不确定性和不精确性,同时发生的变化的阶段或周期性的数据。因此,本文提出了一种推广的Dempster-Shafer证据理论。具体地说,广义Dempster-Shafer证据理论中的质量函数是用复数来表示的,称为复基本信念赋值,它具有更强的表达不确定信息的能力。在此基础上,开发了一种广义Dempster组合规则。与经典的Dempster合成规则相比,广义的Dempster合成规则取消了证据间冲突系数K<1的条件。因此,它比经典的Dempster组合规则更具有一般性和适用性。当复质量函数从复数退化为实数时,在证据间冲突系数K小于1的条件下,广义Dempster合成规则退化为经典证据理论。总之,这种推广的Dempster-Shafer证据理论为建模和处理更多的不确定信息提供了一种很有前途的方法。

英文摘要:

Dempster-Shafer evidence theory has been widely used in various fields of applications, because of the flexibility and effectiveness in modeling uncertainties without prior information. However, the existing evidence theory is insufficient to consider the situations where it has no capability to express the fluctuations of data at a given phase of time during their execution, and the uncertainty and imprecision which are inevitably involved in the data occur concurrently with changes to the phase or periodicity of the data. In this paper, therefore, a generalized Dempster-Shafer evidence theory is proposed. To be specific, a mass function in the generalized Dempster-Shafer evidence theory is modeled by a complex number, called as a complex basic belief assignment, which has more powerful ability to express uncertain information. Based on that, a generalized Dempster's combination rule is exploited. In contrast to the classical Dempster's combination rule, the condition in terms of the conflict coefficient between the evidences K<1 is released in the generalized Dempster's combination rule. Hence, it is more general and applicable than the classical Dempster's combination rule. When the complex mass function is degenerated from complex numbers to real numbers, the generalized Dempster's combination rule degenerates to the classical evidence theory under the condition that the conflict coefficient between the evidences K is less than 1. In a word, this generalized Dempster-Shafer evidence theory provides a promising way to model and handle more uncertain information.

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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