一种改进的证据权重确定方法  

An Improved Determination Methods of Evidence Weight Coefficient

作　　者：许将军[1] 杜仲[2] 

机构地区：[1]中国民航飞行学院航空工程学院,四川广汉618307 [2]中国民航飞行学院遂宁分院,四川遂宁629000

出　　处：《火力与指挥控制》2015年第4期81-83,共3页Fire Control & Command Control

摘　　要：针对Dempster方法在合成高冲突证据时存在的问题,分析了现有改进方法的缺点,提出了一种新的改进方法。该方法首先利用证据之间的相似系数求出各证据的初级权重;然后引入权重折扣因子,将冲突证据的权重按折扣因子折算后并入到其他证据的权重中,得到各证据的综合权重;最后对证据加权平均后再利用D-S组合规则进行组合,通过算例比较表明改进后的方法合成结果更加有效。To deal with the problem arising in using D-S combination rule for the combination of highly conflicting evidences,disadvantage of existing improved method have been analysed. So a new modified method is proposed,the new method has first calculated the evidence primary weight via similarity degree of evidence. Then the concept of the evidence weight discount coefficient is introduced,weight of conflict evidence times discount coefficient is calculated and the evidence weight to form an overall weight of evidence is marged into. Finally,D-S combination rules is used to combined the weighted average evidence. An example indicates that the new method can give the more reasonable combination results compared with D-S combination rule and the other modified methods.

关 键 词：冲突证据 初级权重 权重折扣因子 综合权重 

分 类 号：TP18[自动化与计算机技术—控制理论与控制工程]