一种冲突证据组合方法  

A Combination Method for Conflicting Evidences

作　　者：刘涛[1] 彭世蕤[2] 王海[3] 杨海东[4] 

机构地区：[1]空军雷达学院研究生管理大队,湖北武汉430019 [2]空军雷达学院信息对抗系,湖北武汉430019 [3]合肥电子工程学院,安徽合肥230037 [4]空军装备研究院雷达与电子对抗研究所,北京100085

出　　处：《无线电工程》2009年第8期41-44,共4页Radio Engineering

摘　　要：针对证据理论的冲突证据融合问题,分析了D-S合成方法的不足,提出了一种新的改进方法,即基于小概率命题似然度最小值的冲突证据组合方法。该方法通过选择信任折扣因子使得命题似然度达到最小,在应用中会比Dempster组合规则和平均策略更为灵活,更符合证据理论在不确定推理方面的本质特性。通过仿真试验表明该算法能有效地排除干扰,得出了符合实际的组合结果,确保了方法的有效性和可靠性。D-S combination rule and other modified methods are defective in resolving the combination problem of highly conflicting evidences. To solve this problem, the paper presents a combination method of conflicting evidences based on minimum likelihood of smallprobability proposition, which minimizes the likelihood of proposition by choosing credit discount factor. This method is more flexible than Dempster rules in application and it conforms to the nature of evidence better. Simulation experiments are conducted to demonstrate the rationality of this new improved algorithm when dealing with conflicting evidences. Although the evidences intensively conflict with each other, the combination result is practical and proves the validity and reliability of the method.

关 键 词：小概率命题 似然度 冲突证据 

分 类 号：TN974[电子电信—信号与信息处理]