基于改进组合赋权物元可拓模型的泥石流危险性评价

针对泥石流危险性评价中权重和危险度,基于改进的组合赋权物元可拓评价模型,提出确定权重的优化算法。首先,根据文献分析泥石流危险度的分级标准,建立危险度评价指标,然后结合可拓物元评价理论,针对可拓法各指标权重确定的问题,将层次分析法计算得到的主观权重结合投影寻踪法所得到的客观权重通过距离函数进行耦合,从而获取各指标最终的综合权重,结合投影寻踪法优化蝙蝠算法进行求解,形成泥石流评价的组合赋权物元可拓模型。最后,借助Mat lab语言,调用内嵌工具箱和相应数学函数,编制程序得以实现。结合已有工程实例验证表明:危险性评价与实际工程相符合,评价结果相对合理,具有一定的工程应用价值。

Debris Flow Hazard Assessment Based on Improved Matter-Element Extension Model

As weight is an important issue in risk evaluation of debris flow, an optimization algorithm of determining weight reasonably is proposed in this paper based on improved combination weighting matter-element extension model. Firstly, according to references, risk classification standard of debris flow is suggested, and assessment indices of hazard degree are set up. Then, with matter-element extension evaluation idea, in order to get the weight of each indicator of this method, coupling the subjective weight calculated by analytical hierarchy process and the objective weight calculated by projection pursuit method with distance function to get comprehensive weight of indicators, using bat algorithm which is optimized by projection pursuit method to get solution, according to above research, combination weighting matter-element extension model and algorithm of debris flow are built. Finally, programming with Mat lab language to realize this algorithm, compare the results from this algorithm to existing projects, it turns out that the evaluation conclusion is reasonable which has definite value to engineering application.