组合赋权法确定地质灾害危险性评价指标权重

A Combination Weighting Method for Determining the Index Weight in Geological Hazard Risk Assessment

针对现有地质灾害危险性评价中指标权重确定方法的不足,首先基于粗糙集理论提出了指标相对重要度的计算公式,并对主观赋权法中的AHP法进行了改进;然后与客观赋权法中的熵值法进行综合优化,求得评价指标的组合权重;最后,提出了一种综合分析方法来选取评价指标主、客观权重的偏好系数u值。该方法综合考虑了指标的主、客观成分,将专家判断和客观分析相结合,可以得到较为理想、合理的权重值。

Considering the deficiencies of the indexes weight method in present risk evaluation, firstly, a formula of calculating the relative significance of indexes is proposed based on rough set theory and the traditional analytic hierarchy process （AHP） method of subjective weight method is improved. Then the synthesis optimization process is carried out with entropy value method of the objective weight method to obtain the combination weight of the evaluation indexes ; Finally, the combination weight method is proposed for selecting the value of the favorable coefficient of the subjective and objective weight of the evaluation indexes. The objective and subjective aspects of indexes are taken into account in this method, and a relatively reasonable weight value may be obtained by combining the expert judgment and the objective analysis.