引入权重因子的证据合成方法

D-S理论是一种有效的不确定性推理方法,但在证据完全冲突或冲突较大时,D-S证据合成公式失效.Yager等学者对此作了改进,但是改进后合成公式又存在着新的问题.考虑到证据在合成过程中的重要程度不同,将权重因子引入到合成公式中,通过权重因子的作用和冲突概率的重新分配,提出了引入权重因子的D-S证据合成方法,新的合成公式提高了证据合成的可靠性和合理性,可得到更为理想的合成结果.

An Evidence Combination Method of Introducing Weight Factors

Dempster-Shafer theory is an effective method for dealing with uncertainty problems.It can combine evidences from different sources and therefore it has been successfully applied in many domains.However,its application is limited by the shortcomings of D-S evidence combination method.The D-S evidence combination method may be useless when the conflict among evidences is rather great or even complete.Yager had presented some modified combination methods,but these methods have some deficiencies.According to the importance of the evidences,the paper is concerned with a new evidence combination method with introducing weight factors and allotting the conflicted probability again.This method improves the rationality and reliability of the evidence combination and better results can be acquired.