Abstract:

To solve the problem of the unrealistic results arising in using Dempster’s method for the combination of highly conflicting evidences, an improved evidence combination method is presented which is based on support degree. First of all, the similarities between evidences are used as an approach to judge whether conflicts exist. If there are more than 3 evidence combinations with conflicts, the characteristic vector correspon ding to the maximum characteristic value of the support matrix is used so as to obtain the evidences’ support degree coefficients. Then, BPA functions are transformed by means of the support degree coefficients. Finally, the Dempster’s method is used for the combination. The stimulation results show that the proposed method can deal with conflicting evidence solve the problem caused by one vote veto effectively, combinations calculate faster than other improved algorithms, reduce uncertainty in recognizing results, and retain the advantages of Dempster’s method.