摘要
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。
As weight is an important issue in hazard assessment of debris flow,an optimized algorithm to determine weight reasonably was proposed in this paper based on an improved combination weighting matter-element extension model.Firstly,we suggested a classification standard for debris flow hazards based on literature,and established indices for hazard assessment.Then,based on the matter-element extension evaluation theory,in order to determine the weight of each index of this method,we coupled the subjective weight calculated by analytical hierarchy process and the objective weight calculated by projection pursuit method using a distance function,and obtained the final comprehensive weight of each index.We used the bat algorithm optimized by projection pursuit method to solve the problem,and established a combination weighting matter-element extension model for debris flow assessment.Finally,we composed a program to realize this algorithm in the Mat lab language using the built-in toolbox and related mathematical functions.We compared the results from this algorithm with existing projects,and found that the assessment conclusion was reasonable,proving the method to be of certain application value.
出处
《南水北调与水利科技》
CSCD
北大核心
2017年第5期104-109,共6页
South-to-North Water Transfers and Water Science & Technology
基金
国家自然科学基金面上项目(51279219)
长江科学院开放研究基金资助项目(CKWV2016393/KY)
重庆市教委科学技术研究项目(KJ1601005)
重庆三峡学院校级重大培育项目(15ZP04)
重庆三峡学院三峡库区工程结构防灾减灾与安全科研创新团队~~
关键词
泥石流
危险性评价
物元可拓模型
组合赋权
debris flow
hazard assessment
matter-element extension model
combination weighting