摘要
在D-S证据理论中,冲突系数不能很好地描述证据之间的冲突,而且当证据高度冲突时会得到有悖常理的结果.为了解决该问题,提出一种自适应冲突证据检验与合成方法.首先,利用证据向量夹角余弦度量证据之间的相似性程度,并提出冲突证据判据,通过冲突证据检验因子实现证据分类;然后,引入冲突比例因子来决定证据的修正方法,并利用相似度对其进行局部或全局修正;最后,将修正后的证据进行检验与合成.通过应用实例验证了所提出方法的有效性.
In the D-S evidence theory, conflicting coefficient cannot well depict the conflict between evidences, and counterintuitive results may be generated in the combination of highly conflicting evidence. Therefore, a self-adaptive conflicting evidence test and combination approach is proposed. Firstly, cosine between evidence vectors is used to measure the similarity degree, and conflicting evidence criterion is presented. The evidence is classified by conflict evidence detection coefficient. Then, the conflicting proportion coefficient is introduced to decide the modified method for the evidence, and the local modification or full modification is decided according to its similarity. Finally, the modified evidence is tested and combined. Application example illustrates the effectiveness of the proposed method.
出处
《控制与决策》
EI
CSCD
北大核心
2014年第5期929-932,共4页
Control and Decision
基金
国防预言基金项目(9140A27020309JB4701)
关键词
证据理论
冲突检验
相似度
修正
evidence theory
conflicting test
similarity
modification
