论文部分内容阅读
针对黄河堤防工程安全的评价问题,首先基于后果逆向扩散法,构建了多层次半结构性的评价指标体系;基于分层赋权思路,对多层次的黄河堤防评价体系进行赋权。第1层(输入层)通过计算熵值权向量来确定指标的数学权向量,第2层(准则层)采用熵值权向量、等权重和经验赋权法3种权向量,利用模糊评价模型进行计算对比。选择黄河下游6个典型堤段进行实例计算,第2层的计算中采用了3种权重:熵值权向量(0.394,0.606),等权重(0.500,0.500)和主观权重(0.600,0.400)。根据评价结果可知,各堤段综合评价值基本一致。工程因素子系统最优的是堤防1、3、4,非工程因素子系统最优的是堤防5、6,熵值权向量和等权重评价结果均为堤防5黄河北岸陶城铺段堤防最优;主观权重评价为堤防3黄河南岸东平湖段堤防最优。后果逆向扩散法可以快速全面地确定安全影响因子,分层赋权可以有效地克服人为权重的影响,从而保证获得客观合理的安全评价值,并能根据评价结果找到堤防工程安全相对薄弱的因素,为黄河堤防的安全运用提供数据支撑。
According to the evaluation of Yellow River embankment safety, a multi-level semi-structural evaluation index system is constructed based on the reverse spread of consequences. Based on the idea of layered empowerment, multi-level evaluation system of Yellow River embankment is empowered. The first layer (input layer) determines the mathematical weight vector of the indicator by calculating the entropy weight vector, the second layer (the standard layer) adopts the entropy weight vector, the equal weight and the empirical weighting method, and uses the fuzzy evaluation model Calculated comparison. Six typical embankments of the lower Yellow River were selected for example calculation. Three kinds of weights were used in the calculation of the second layer: entropy weight vector (0.394,0.606), equal weight (0.500,0.500) and subjective weight (0.600,0.400). According to the evaluation results, it can be seen that the comprehensive evaluation values of each section are basically the same. The engineering factor subsystem is the best embankment 1,3,4, non-engineering factor subsystem is the best embankment 5,6, entropy weight vector and equal weight evaluation results are embankment The evaluation of subjective weight is the best in embankment of Dongpinghu section on the south bank of Yellow River embankment. Consequences reverse diffusion method can quickly and comprehensively determine the safety impact factor. Layered empowerment can effectively overcome the influence of artificial weight, so as to ensure objective and reasonable safety evaluation value. According to the evaluation results, we can find the factors of relatively weak safety of dike engineering, Provide data support for the safe utilization of Yellow River embankment.