基于粗糙集理论的规则权重确定方法

The Method of Ascertaining Rule Weight Based on Rough Sets Theory

通常规则权重的确定方法是根据专家的先验知识来确定.本文根据粗糙集理论中规则的改进的确定性因子的判断方法,提出将专家的先验知识给定的权重同粗糙集理论规则的改进的确定性因子结合起来最终确定规则权重,即基于粗糙集理论的规则权重确定,实现主观先验知识同客观情况的统一,从而得出更加理想的权重确定结果.本文主要目的是为决策者提供一种规则权重的确定方法,使决策者能够作出更加科学、更加合理的决策与分析.本文运用文献方法系统分析方法和实证分析方法.

Rule weight is usually ascertained by experts＇ experience knowledge. According to calculation method of rule＇s improved deterministic factor in rough sets,the paper puts forward the method of ascertaining rule weight which combines weight given by experts with rule＇s improved deterministic factor ascertained by rough sets, that is the method of ascertaining rule weight based on rough sets. The method realizes unity between subjective experience knowledge and objective situation, thus it can acquire much more ideal result. The main purpose is that this paper provides policy-makers with a kind of new method of ascertaining rule weight, in order to contribute to make more scientific and more reasonable decision and analysis. This paper adopts document method, systematic analysis method and example analysis method.