求粗糙集正域POS_c(D)的表上作业法

The method for calculating the positive regions in rough setsby translating the decision tables

给出了一种非常简洁的求POSC(D)的表上作业方法,此法不仅无须分别求出U IND(C)和U IND(D),而且省略了U IND(C)和U IND(D)之间的比较及求交的程序;最后,应用这一方法研究了评价和预测问题中各因素的合理赋权问题,对中国区域生态水平评价问题进行了权重挖掘,按照所得权重给出了新的评价结果.

This paper gives a very compact method for calculating the positive regions POS_C(D) in rough sets by translating the decision tables.This method not only need not calculate U/IND(C) and U/IND(D),but also omits the comparatire and joint calculation between U/IND(C)and U/IND(D).Finally,we investigate the logicality of the evaluation of weighting in our research,giving a method to mine the weighting of judged factors from original statistic data and processing the weighting mining on the judgement of the region zoology level of China.