基于最小熵分析的泥石流危险度可拓学评价

选取流域面积、流域最大高差等16个影响因素对泥石流危险性进行评价。通过最小熵分析理论分析各因素对泥石流性质的影响程度,消除因素间的相关性。根据各因素对泥石流系统的贡献率,优选出主要影响因素,并确定其权重。在物元理论、可拓学理论和关联函数运算的基础上,建立了泥石流危险度评价物元模型。通过对实际泥石流沟进行进行危险度等级关联度计算,对泥石流沟危险性进行了可拓学评价,将评价结果与文献评价结果对比分析,认为泥石流可拓学评价结果能较准确的反映泥石流的危险度水平,同时说明,在泥石流危险度评价领域,运用最小熵分析原理进行因子优选和确定权重有一定的合理性。

Extenics in debris flow risk evaluation based on minimum entropy analysis

Sixteen conventional evaluation-factors such as watershed area,maximum altitude difference wre chosen to evaluate the debris flow risk.Analyzing of the impact level of various factors on the debris flow and eliminated the correlation of the factors based on the minimum entropy analysis(MEA).According to the contribution rate to the debris system,the main factors and their weights were determined.On the basis of matter-element theory,extension set theory and dependent funetion ealeulation,a matter-element model evaluating the risk of debris flow.By practical calculation of dependent degree to the risk level of debris flow,the risk level is evaluated by extenics.Compared with the evaluation results of the literature,the debris flow evaluation results obtained by the extenics method can more precisely reflect the practical risk level of debris flow.This shows that the application of MEA to select the main factors and determine their weights has a certain rationality.