文中试图从几个方面来改进简化证据理论模型ＵＲＭ１的性能．针对ＵＲＭ１，文中给出了两个基本支持函数（相当于证据理论的Ｍａｓ函数）间的距离函数，进一步讨论了基本支持函数间的组合条件；给出了基于向最高权威看齐策略的组合带权威性因子基本支持函数的方法．提出了一种对证据理论的证据区间进行决策的方法，一方面，它比ＵＲＭ１中的证据区间决策方法更具一般性，另一方面，它更符合人类的直觉，同时，它对多个异质型专家系统间的协作研究也有一定的意义 This article attempts to improve the performance of simplified evidence theory model URM1 from several aspects. For URM1, the distance function between two basic support functions (corresponding to the Mas function of evidence theory) is given in this paper, and the combination conditions of the basic support functions are further discussed. The combination based on the strategy of supreme authority is given. The basic function of the sex factor method. A method to make decisions on the evidence interval of evidence theory is proposed. On the one hand, it is more general than the evidence interval decision method in URM1. On the other hand, it is more in line with human intuition. At the same time, Collaborative research between the quality expert system also has some significance