第卷第期刘坚等:基于优化随机森林模型的滑坡易发性评价
４３７１０９１
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RandomForestD．TianinNankaiUniversit１６TianZhenuoChenWenminLuShuian
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(安洲基于随机森林的硬盘故障预测算法的研
２０１４．etal．ControlandTrierinFactorsAnalsisof
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究天津南开大学
D．２０１４LandslidesandRockfallsintheThreeGorgesReＧ
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１５PengLing．LandslideRiskAssessmentintheThreeservoirAreaJ．ResourcesEnvironment&EngiＧ
[]:,,():(田正国,程温鸣,卢书
GoresReservoirD．WuhanChinaUniversitofneerin２０１３２７１５０Ｇ５５
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,(彭令三峡库区滑坡灾害风险评强,等三峡库区滑坡崩塌发育的控制与诱发因素分
Geosciences２０１３．．
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估研究武汉中国地质大学析资源环境与工程
D．２０１３J．２０１３２７１５０Ｇ５５
LandslideSuscetibilitAssesmentBasedonOtimizedRandomForestModel
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１２１１
LIUJianLIShulinCHENTao
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１InstituteofGeophysicsandGeomaticsChinaUniversityofGeosciencesWuhan４３００７４China
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２KeyLaboratoryofEarthquakeGeodesyInstituteofSeismologyCEAWuhan４３００７１China
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AbstractTheresearchareaislocatedinShazhenxitownandXietantownofThreeGorgesreservoir
,
areainthisaer．Inordertoobtainbetterresultsthatdiscretethecontinuousfactorsoflandslide
pp
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entrobasedonminimaldescritionlenthrincileEntＧMDLPmethodisused．ToavoidtheinfluＧ
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enceofcorrelationbetweenfactorswecalculatethePearsoncorrelationcoefficienttoremovehigh
,
correlationfactor．InordertoobtainmoreaccuratenonＧlandslidesamleointsthenonＧlandslide
pp
samleointsarerandomlselectedfromtheverlowandlowsuscetiblereionsredictedbthe
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entropymethod．Fortheoptimizedrandomforestsmodeltheoptimalrandomfeaturesanditsnumber
aredeterminedbyiterativecalculationofoutＧofＧbagerrorestimation．Thentheoptimizedrandom
,
forestisevaluatedforthelandslideofthestudareaandthelandslidesuscetibilitlevelisdivided．
ypy
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ThemodeliscomaredwiththemethodsofloisticreressionsuortvectormachineandnonＧotiＧ
pggppp
mizedrandomforest．Theaccuracyofeachmodelisevaluatedbyplottingthereceiversensitivitycurve
’,
ofeachalorithm．Theotimizedrandomforestsareaisthehihestwhichtheareaunderthecurve
gpg
is９１．８％．TheseshowthattherandomforestmodelisotimizedwithmorehihＧredictiveowerin
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landslideＧproneassessment．
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KeywordsThreeGorgesreservoirarealandslidediscretizationrandomforestoptimizationsusＧ
cetibilitassessment
py
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FirstauthorLIUJianPhDcandidateengineerspecializesincloudcomputingandgeologicaldisasterassessment．EＧmaillinefanliu＠
１６３．com
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CorresondinauthorLIShulinostraduate．EＧmaillishulincu＠mail．com
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FoundationsupportTheNationalHighTechnologyResearchandDevelopmentProgramofChina８６３ProgramNo．２０１２AA１２１３０３． |
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