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                  from2001to2019,butgroundwaterlevelsinmostareasdecreased,andtheareaofdecreasedregionwas18,600km,
                  accountingfor83.97% ofthetotalstudyarea.Therapidexpansionofthepaddyfieldwasresponsiblefortheoverall
                  declineingroundwaterlevels.Thereisasignificantresonancerelationshipbetweengroundwaterlevelchangeand
                  precipitationintheannualcycleinthewaterlevelrisingarea ,thegroundwaterlevellagsabout11.52daysrelative
                  totheprecipitation ,andthePearsonCorrelationCoefficientbetweenthemis0.485;butthereisnostableperiodic
                  correlationbetweengroundwaterlevelandgroundwaterexploitationinthisarea,andthecorrelationispoor.There
                  isnostableperiodiccorrelationbetweengroundwaterlevelchangeandprecipitationinthecentralandeasternpartof
                  thestudyareawherethegroundwaterleveldropssignificantly,andthecorrelationispoor;butthereisasignificant
                  resonancerelationshipbetweengroundwaterlevelandgroundwaterexploitationintheannualcycleinthisarea ,the
                  variationingroundwaterlevellagsbehindthevariationingroundwaterexploitationbyabout10.8days,andthe
                  PearsonCorrelationCoefficientbetweenthem is- 0.409.Thegroundwaterlevelissignificantlymoreaffectedby
                  groundwaterexploitationthanbyprecipitationinthecentralpartofthestudyareawherethegroundwaterleveldrops
                  sharply.Thoughthewaterlevelintheirrigationareawherethegroundwaterleveldropsslightlyismoreaffectedby
                  groundwaterexploitation ,itisalsogreatlyaffectedbyprecipitation.Thisresearchisofgreatsignificanceforcon
                  ductingin - depthinvestigationsofregionalgroundwaterresourceschangesandguidingtherationaldevelopmentand
                  utilizationofgroundwaterresourcesinthisregion.
                  Keywords:SanjiangPlain;groundwaterflowfield;precipitation;groundwaterexploitation;CrossWaveletTrans
                  form


                                                                                    (责任编辑:李 娜)




              (上接第 643页)
                  Developmentandapplicationofconcretevibratingrobotsystem forhigharchdam

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                  WANGXiaoling,WANGDong,RENBingyu,CHENWenfu ,TANYaosheng ,GUANTao
                      (1.StateKeyLaboratoryofHydraulicEngineeringSimulationandSafety,TianjinUniversity,Tianjin 300072,China;
                                  2.ChinaThreeGorgesProjectsDevelopmentCo.,Ltd.,Chengdu 610041,China;
                                      3.ChinaThreeGorgesGroupCorporation,Beijing 100038,China)
                  Abstract:Thetraditionalmanualvibrationisfacedwiththeshortcomingsofhighlaborintensityandstrongsub
                  jectivityduringnormalconcreteplacement ,andtheexistingvibrationmonitoringmethodsmainlyfocusonthevi
                  brationparameterssuchasvibrationpositionandvibrationtime.Thosemethodsmainlyrelyonmanualexperience
                  toevaluatewhetherthevibrationisconsolidated,whichisdifficulttorealizetheaccurateevaluationofconcrete
                  vibrationquality.Tosolvethoseproblems ,aconcretevibratingrobotsystemintegratingsurfaceimagerecognition
                  usingmachinevisionmethodisdeveloped ,whichincludesvibratingrobot,cloudmonitoringplatform andcom
                  municationsubsystem.Thevibratingrobotisdesignedtorealizetheunmannedvibrationofconcreteonthestore
                  housesurfaceofhigharchdam usingadvancedtechnologyincludingtheindustrialrobot ,automaticcontroland
                  machinevision.Meanwhile , theclassificationmodelofconcretesurfaceimagebasedonimprovedresidual
                  network(ResNet)isestablishedtorealizethescientificanalysisofvibrationquality.Moreover,thecloudmoni
                  toringplatformisdevelopedbasedontheB/Sarchitecture ,andtheinformationtransmissionandinteractionwith
                  thevibratingrobotarerealizedthroughthewirelesscommunicationsubsystem ,whichrealizesthevibrationinfor
                  mationvisualizationandremotecontrol.Thefieldtestshavebeenconductedtoverifythereliabilityandfeasibility
                  oftheproposedvibratingrobotsystem.Theresearchresultsprovideanewideaandtechnicalwayforrealizingun
                  mannedvibrationandrefinedqualitycontrolofconcreteplacementofhigharchdam andcouldbeusedforother
                  massconcreteconstruction ,whichhavesignificantapplicationandpopularizationvalue.
                  Keywords:higharchdam;concretevibration;vibratingrobotsystem;machinevision;improvedResNet;surface
                  imageclassification

                                                                                    (责任编辑:李福田)


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