基于粗糙集原理的泥石流危险度区划指标选取方法  

A NEW METHOD FOR CHOOSING ZONATION INDICATORS OF MUDFLOW DANGER DEGREES BASED ON THE ROUGH SET THEORY

作　　者：匡乐红[1] 徐林荣[1] 刘宝琛[1] 姚京成[1] 

机构地区：[1]中南大学土木建筑学院,湖南长沙410075

出　　处：《地质力学学报》2006年第2期236-242,共7页Journal of Geomechanics

基　　金：铁道部科技研究开发计划重点课题基金项目(2005F024)资助

摘　　要：针对现有泥石流危险度区划指标选取方法的不足,本文基于粗糙集原理,提出了一种新的区划指标选取方法,即首先根据泥石流形成的环境背景条件,建立备选指标体系,然后根据指标等级对备选指标离散化处理,最后利用粗糙集的分辨矩阵对指标进行求核约简,筛选出代表性指标。实例应用表明该方法易于操作,并基本兼顾了所选指标的代表性和全面性。In view of the deficiency in methods for choosing zonation indicators of mudflow danger degrees, a new method for choosing zonation indicators of mudflow danger degrees is put forward based on the rough set theory in this paper. Firstly, according to the environmental conditions of forming mudflows, an indicator choice system is established. Then the indicators for choice are discretized by indicator grading. Finally, based on the discernable matrix of the rough set, a core set of the indicators is found and the representative indicators are sieved out. The examples show that this method is easy to operate and considers both representativeness and comprehensiveness.

关 键 词：粗糙集 分辨矩阵 泥石流危险度 区划指标 

分 类 号：P642.23[天文地球—工程地质学]