Page 148 - 《水资源与水工程学报》2023年第3期
P. 148

!34 " ! 3 #                       & ' ( ) & * + , -                               Vol.34No.3
               2023 $ 6 %               JournalofWaterResources&WaterEngineering                 Jun.,2023

            DOI:10.11705/j.issn.1672-643X.2023.03.18


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                 ABCDE:TV641.4   FGHIJ:A    FKLE:1672643X(2023)03014407

                    ApplicationofGaussianprocessregressionmodelbasedonwavelet
                                  denoisinginsettlementpredictionofCFRD

                                                                                              3
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                                                                   2
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                                         1
                          HUANGLingzhi,CHENSiqi,LIChengyu,SIZheng,ZHANGFeiyue
                  (1.FacultyofWaterResourcesandHydroelectricEngineering,Xi’anUniversityofTechnology,Xi’an710048,China;
                   2.SichuanWaterDevelopmentInvestigation,Design&ResearchCo.,Ltd.,Chengdu610072,China;3.Phase Ⅲ
                           ConstructionAdministrationOffice,Xi’anUniversityofTechnology,Xi’an710048,China)
                 Abstract:ThesettlementanddeformationofCFRDarecausedbymultiplecomplicatedenvironmental
                 factors,andtheobserveddeformationdatashowobviouscharacteristicsofnoiseinterference,whichhasa
                 greatinfluenceonthefittingandpredictionaccuracyofmathematicalmodels;however,theusefulsignal
                 andnoiseintheoriginalsignalcanbedecomposedeffectivelybywavelettransformtheory.Therefore,the
                 wavelettransformtheoryisintroducedtoestablishamathematicalmodelbasedonwaveletthresholdde
                 noising ,whichisthenappliedtothedenoisingofthemeasuredsettlementdataofaCFRD,andthede
                 noiseddataisprocessedbyGaussianprocessregression (GPR)toestablishamodelforpredictingsettle
                 mentdeformationofCFRD.BasedonthemeasuredsettlementdeformationdataofacertainCFRD,the
                 Wavelet-GPRmodelisusedtofitandpredictthedamsettlement ,andthecalculationresultsarecom
                 paredwiththoseoftheGPRmodelwithoutdenoising.Theresultsshowthattheresidualdifferencebe
                 tweenpredictedvaluesandobservedvaluesoftheWavelet-GPRmodelisinaccordwithnormaldistribu
                 tion.TheRMSEofthelearningsegmentdecreasedfrom0.9287mmto0.4577mm,andtheMAEde
                 creasedfrom0.4850mmto0.3306mmafterdenoising.Furthermore ,theRMSEofthepredictionseg

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