基于信任度和确定度的证据加权组合方法

发布时间：2018-01-19 23:46

本文关键词： 证据组合信任度确定度冲突度量精度熵　出处：《通信学报》2017年01期 　论文类型：期刊论文

【摘要】：针对高冲突条件下Dempster规则失效的问题,提出一种基于信任度和确定度的证据加权组合方法。首先,对传统证据冲突度量方法—夹角余弦进行了修正,使其能有效处理证据中包含非单子集焦元的情况,并基于其建立了证据信任度模型;其次,为综合反映证据体包含非单子集焦元的程度以及证据体概率分配函数的离散程度,建立了基于证据精度与证据熵的证据确定度模型;然后将信任度与确定度结合来确定证据权重;最后依此权重对证据进行加权平均,并使用Dempster规则对平均后的证据进行组合。算例分析表明,与传统证据加权组合方法相比,所提方法在冲突消减和聚焦能力2个方面都具有更好的性能。
[Abstract]:In order to solve the problem of failure of Dempster rules under high conflict conditions, a new evidence-weighted combination method based on trust and certainty is proposed. In this paper, the traditional measurement method of evidence conflict, the angle cosine, is modified to deal with the case where the evidence contains non-single focus elements, and the evidence trust model is established based on it. Secondly, in order to synthetically reflect the degree of evidence body including non-single sub-focus element and the discrete degree of probability distribution function of evidence body, a proof certainty model based on evidence precision and evidence entropy is established. Then the trust degree and certainty degree are combined to determine the weight of evidence; Finally, according to the weight of the weighted average evidence, and use the Dempster rule to combine the average evidence. The case analysis shows that compared with the traditional method of weighted combination of evidence. The proposed method has better performance in both conflict reduction and focus ability.
【作者单位】：空军工程大学防空反导学院;
【基金】：国家自然科学基金资助项目(No.61272011)~~
【分类号】：TP202
【正文快照】： 1引言证据理论由Dempster于1967年在研究统计问题时提出[1],后经Shafer推广和发展[2],成为系统化的不确定性推理理论,故又名Dempster-Shafer(D-S)理论。D-S理论可在无先验信息的情况下有效表达和处理不确定信息,现已成为决策级信息融合领域的重要理论和方法。随着研究的深入,

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