基于证据源预处理的冲突证据组合新方法

摘要

针对冲突证据的组合问题，提出了一种新的证据组合方法。通过定义证据间的 Jaccard相似度获得各个证据的归一化可信度，在此基础上获得一个标准证据。利用该标准证据对各初始证据进行修正，最后利用 Dempster-Shafer(DS)组合规则获得证据组合结果。证据组合过程中既保持了 DS规则良好的数学性质，又有效地减小了冲突证据带来的干扰，提高了组合结果的合理性与可靠性。%　　A novel evidence combination method is proposed to process conflict evidence. Jaccard index is introduced to calculate the similarity between two bodies of evidence, and the credibility of each body of evidence is obtained. Then the standard evidence is obtained to modify all origin evidences, and Dempster-Shafer(DS) rule is applied for evidence combination. Good performance of the proposed method is demonstrated by numerical experiments.