基于改进冲突系数的证据理论组合新方法

A novel combination of evidence theory based on improved conflict coefficient

通过对D-S证据理论冲突系数和组合规则进行研究,发现导致证据组合结果与事实相悖的另一个因素,为此,提出一种新的冲突系数表示方法和证据理论组合规则。新的方法针对证据冲突系数处理和组合规则不合理的情况,用自冲突系数和互冲突系数这2种方式的加权表示新的全局冲突系数。新的组合规则根据基本概率分配原则建立,并推导得出多点集焦元证据理论的组合情况。研究结果表明:本文所提方法与传统算法相比,规则更简便,更精确,在处理证据冲突和正常证据方面更具优势。

The conflict coefficient and the combination rule of D-S evidence theory were studied and another factor that leads to the conflict between the results of evidence combination and fact was found.A novel representation of conflict coefficient as well as combination rules of evidence theory was proposed.The irrational situation of the evidence conflict coefficient processing and the combination rule were taken into consideration within the novel scheme.In this scheme,the novel global collision coefficient in terms of self-collision coefficient and conflict coefficient were presented.The new combination rule was established in compliance with the principle of basic probability distribution,and the combination of the theory of multi-point set of element evidences was deduced.The results show that the proposed method is simpler,and more accurate than the traditional algorithm.It has advantages in dealing with the evidence confliction and normal evidence.