改进的给水管网节点K均值空间聚类
- 海之魂
-
0 次阅读
-
0 次下载
-
2020-03-16 10:10:00
文档简介:
第49卷第11期2015年11月浙江大学学报(工学版)JournalofZhejiangUniversity(EngineeringScience)Vo1.49NO.11NOV.2O15DO1:10.3785/j.issn.1008—973X.2015.11.013改进的给水管网节点K均值空间聚类柳景青,郭东进,叶萍(1.浙江大学建筑工程学院市政工程研究所浙江杭州310058;2.嘉源给排水有限公司浙江嘉兴314000)摘要:利用自适应精英保留遗传算法优选初始聚类中心,信息熵确定属性权重改进K均值空问聚类,应用于给水管网节点聚类.实例验证表明,改进的K均值空间聚类方法在聚类精度、稳定性、耗时、权重计算方面具有明显的优越性:相对于传统的K均值空间聚类,自适应精英保留策略遗传算法和信息熵确定权重的K均值空间聚类得到的类内距离均值和标准差分别由6.92\1.06下降至4.39\0,聚类精度和稳定性均有较大程度提高;普通遗传算法、自适应精英保留策略遗传算法和模拟退火遗传算法优化的K均值空间聚类消耗时间分别为342、123、383S,自适应精英保留策略遗传算法消耗时间最短;管网拓扑图表明,信息熵权重能客观计算属性权重,结果更加合理.关键词:给水管网;节点;K均值空间聚类中图分类号:TU990.3文献标志码:A文章编号:1008—973X(2015)11—2128—07ImprovedKaveragespatialclusteringmethodfornodesofwaterdistributionsystemLIUJing—qing,GUODong-jin,YEPing(1.DepartmentofCivilEngineering,ZejiangUniversity,Hangzhou310027,China;2.JiaYuanWaterSupplyandSewerageCompany,Jiaxing314000,China)Abstract:Theadaptiveelitistgeneticalgorithmwasintroductedtooptimizethechoiceoftheinitialclustercenters.Theinformationgentropywascombinedtoobjectivelydeterminetheattributes’weights,whichcanimproveK—averagespatialclusteringfornodesofwaterdistributionsystem.ThecasestudyprovethatadaptiveelitistgeneticalgorithmKaveragespatialclusteringhasobviousadvantagesinclusteringaccura—cy,stability,elapsedtimeandweightchoice.RelativetotraditionalK—averagespatialclustering。theaver—agevalueandstandarddeviationofinner—classdistanceresultingfromadaptiveelitistgeneticalgorithmKaveragespatialclusteringrespectivelydecreasefrom6.92\1.06to4.39\0.Theclusteringaccuracyandstabilitycanbeapparentlyimproved.ElapsedtimeofgeneticalgorithmKaveragespatialclustering,adap—tiveelitistgeneticalgorithmKaveragespatialclusteringandsimulatedannealinggeneticalgorithmKaver—agespatialclusteringwererespectively342,123,383S,ElapsedtimeofadaptiveelitistgeneticalgorithmKaveragespatialclusteringistheshortestamongthethreemethods;Networktopologyshowsthattheinfor—marionentropycanobjectivelydetermineattributes’weights,andtheresultismorereasonable.Keywords:waterdistributionsystem;nodes;k—averagespatialclustering城市给水管网
评论
发表评论