Research On The Combination Rule Of D-S Evidence Theory Based On The Open Frame Discernment

As one of the uncertainty reasoning methods, D-S evidence theory has obtained the widespread application in the uncertainty reasoning and information fusion.But the D-S evidence theory is more suitable to solve the low-conflict, high degree of confidence, but in practical applications, it often comes up various biggish inconsistency, then the result may contradicts with the fact. This kind of situation, however, is denied in information fusion, otherwise wrong decision can be made in this case. This limitation becomes the main question for the D-S evidence theory to develop further. Based on this, the paper put forward the research on the combination rule of D-S evidence theory based on the open frame discernment.This paper first studies the basal knowledge of D-S evidence theory, and then studies the coarsening and segmentation, contraction and expansion, based on this it put forward the conception of open frame discernment, and then describes the knowledge of the open frame discernment. Secondly it studies the evidences, thus determined the sequence weight of evidence in combined, and then it proposed the open frame discernment combination rule based on the evidence distance. Regarding evidence conflicts may creates because the external interference, debases the external interference by evidence pretreatment, then put forward the open frame discernment combination rule based on the evidence pretreatment. It studies the evaluation method for the combination rule, and it also develops an emulation system based on the open frame discernment. Finally, through six classical absurdities computation and simulation comparison, the open frame discernment combination rule based on the evidence distance is more validity, but the open frame discernment combination rule based on the evidence pretreatment is more suitable to combine the conflict evidences. They are both remains many advances of former evidence, thus enhances the definitude.