基于信息增益的水工金属结构健康诊断赋权方法研究  

Research on weight method for hydraulic metal structure health diagnosis based on information gain

作　　者：杨光明[1,2] 杨坤[3] 黄勇[1] 景攀德 

机构地区：[1]河海大学能源与电气学院,南京210098 [2]河海大学可再生能源发电技术教育部工程研究中心,南京210098 [3]河海大学大禹学院,南京210098

出　　处：《水力发电学报》2014年第3期253-257,273,共6页Journal of Hydroelectric Engineering

基　　金：国家自然科学基金重点资助项目(50539010);水利部公益项目(200801019)

摘　　要：水工金属结构健康诊断是一种多层次、多标准、多因素的综合诊断系统,其诊断指标是构建健康诊断系统的基础和关键要素,而指标权系数的确定,又将直接关系到整个诊断结果的合理性和可靠性。本文基于信息增益基本原理,利用健康诊断过程中各指标为健康等级的确定所带信息量的多少,计算分析指标的重要程度,可消除各因素权重的主观性,使赋权过程更加科学,诊断结果更符合实际;而根据信息增益赋权法所得出的指标重要程度与FAHP方法所确定的指标权重系数基本上是一致的,运用信息增益法计算每个检测指标的重要程度,一方面可以用来指导数据采集过程,为指标的分析与确定提供理论上的支持;另一方面也可以用来对检测指标进行约简,从而使得诊断分析更加简洁、有效。Hydraulic metal structural health diagnosing system is a multi-level, multi-standard and multi-factor comprehensive system. Diagnosis indexes are the basis and key elements to development of such system and determination of their weight coefficients has a direct effect on diagnosis results. The importance degree of each index is calculated and analyzed using the fundamental principle of information gain and the information carried by each index for determination of a health grade in the health diagnosis process. This method can eliminate the subjectivity in specifying the weights of the indexes and hence improves the weighting process and diagnosing results. Its calculations of the importance degrees of weight coefficients are close to those by FAHP method. It can be used for guiding data collection and analysis and also for simplification of index system for concise and effective diagnosis analysis.

关 键 词：水工金属结构 健康诊断 信息增益 赋权方法 指标 

分 类 号：TV34[水利工程—水工结构工程]