An improved D-S algorithm under the new measure criteria of evidence conflict

To overcome the shortcomings of conventional measure criterion of evidence conflict and solve the invalidation problem of Dempster-Shafer evidence combination rule with high conflict, a novel measure criterion of evidence conflict is defined through pignistic transformation. Based on this definition, a new improved D-S algorithm is proposed in this paper. According to the decision idea that the minority is subordinate to the majority, the proposed algorithm first preprocesses evidence through introducing weight coefficients which represent the importance degree of evidence, then combines preprocessed evidence using Dempster's rule. The numerical study shows that, compared with other methods, the new algorithm has made good performance in dealing with evidence conflict and can accelerate convergence and reduce the decision risk.