基于高冲突修正的D-S证据融合方法

D-S Evidence Fusion Method Based on High Conflict Correction

对冲突证据使用D-S证据理论进行融合前,应确定证据之间冲突的程度。为此,基于信任度和虚假度对冲突进行衡量与修正。计算证据的信任度和虚假度,分别对其进行排序,将具有较小信任度和较大虚假度的证据判定为高冲突证据并加权修正,再使用Dempster组合规则进行证据融合。实验结果表明,该方法可以正确判断高冲突证据,避免融合结果与事实相悖的情况,同时提高收敛的速度和精度。

Before using D-S（Dempster-Shafer） theory for evidence fusion,the extent of the conflict among evidences should be determined. Aiming at this problem,this paper proposes a conflict measure and correction method based on trust degree and false degree. It calculates both trust degree and false degree of each evidence and sorts them respectively. The evidence with smaller trust degree and larger false degree is called high conflict evidence and done weighted correction. Then the Dempster combination rule is used for evidence fusion. Experiment results show that the proposed method can correctly judge the high conflict evidence and solve the problem that the fusion result contradicts the fact, while improving the speed and precision of convergence.