Page 49 - 2024年第55卷第7期
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SimulationmethodsofbankfulldischargeintheLowerYellowRiver
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WUBaosheng ,SHENYi ,MAZipu ,ZHENGShan 4
(1.StateKeyLaboratoryofHydroscienceandEngineering,TsinghuaUniversity,Beijing 100084,China;
2.KeyLaboratoryofHydrosphereSciencesoftheMinistryofWaterResources,TsinghuaUniversity,Beijing 100084,China;
3.DepartmentofHydraulicEngineering,TsinghuaUniversity,Beijing 100084,China;
4.SchoolofCivilEngineering,TianjinUniversity,Tianjin 300072,China)
Abstract:UnderthebackgroundofwaterandsedimentvariationintheYellowRiverBasin,accuratecalculation
ofthebankfulldischargeofthelowerYellowRiveriscrucialforpredictingthetrendofrivererosionandsedimenta
tionandcontrollingthesuspendedriver.Onthebasisofcomparingandanalyzingmultipleexistingmethodsforcal
culatingthebankfulldischargeinthelowerYellowRiver,thisarticlefirstestablishesadelayedresponsemodelfor
bankfulldischargeconsideringtheeffectofnon - floodseasonwaterandsedimentconditions.Then ,asimulation
methodforbankfulldischargebasedondelayedresponsemodelandenergymethodisproposed.Theresultsshow
that :(1)thesignificantchangeshaveoccurredinnon - floodseasonwaterandsedimentconditionsaftertheopera
tionoftheXiaolangdireservoir.Amongthethreemethodsproposedinpreviousstudiesforcalculatingthebankfull
dischargeinthelowerYellowRiver,theslidingaveragemethod,delayedresponsemodel,andenergymethodare
allunabletoeffectivelysimulatethebankfulldischargeinthelowerYellowRiverafter2000.(2)Adelayedre
sponsemodelconsideringtheeffectofnon - floodseasonwaterandsedimentconditionshasbeenestablishedtore
flecttheimpactofnon - floodseasonwaterandsedimentconditionssincetheoperationofXiaolangdiReservoir.Al
thoughthesimulationaccuracyofbankfulldischargehasbeenimproved , someparametersinthecalculation
formulaforthebalancevalueofbankfulldischargehavesignificantdifferencesandthestructuralformisunstable.
(3)Drawingontheadvantagesoftheenergymethod,theformulaforcalculatingtheequilibriumvalueofbankfull
dischargehasbeenimproved.Theimprovedbankfulldischargecalculationmethodcannotonlyreflecttheimpactof
annualincomingwaterandsediment ,butalsosimultaneouslyreflecttheeffectofbedresistancerepresentedbythe
medianparticlesizeofbedsediment.Thenewmethodnotonlyhasacertaintheoreticalbasis ,butalsoimproves
thesimulationaccuracyofbankfulldischarge.
Keywords:LowerYellowRiver;bankfulldischarge;waterandsediment;mediansizeofbedsediment;delayed
response ;energymethod
(责任编辑:李福田)
(上接第 790页)
Anearlywarningmethodforpotentialcollisionriskofdam surface
constructionmachinerybasedonlargescenevideosurveillance
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ZENGTuocheng,WANGJiajun,ZHONGDenghua ,ZHANGYunuo,KANGDong
(1.StateKeyLaboratoryofHydraulicEngineeringIntelligentConstructionandOperation,TianjinUniversity,Tianjin 300350,China;
2.CollegeofWaterResourcesandCivilEngineering,ChinaAgriculturalUniversity,Beijing 100083,China;
3.YalongRiverHydropowerDevelopmentCo.,LTD,Chengdu 610051,China)
Abstract:Basedonlarge - scenevideomonitoring,itisimportanttorealizethepotentialcollisionriskwarningof
damconstructionmachinerytoensurethesafetyofdamsurfaceconstruction.However ,atpresent,itmainlyre
liesonmanualexperiencetojudgethepotentialcollisionriskofdam surfaceconstructionmachinery ,whichis
pronetoproblemssuchasomissionandmisjudgment.Therefore ,thispaperproposesanearlywarningmethodfor
potentialcollisionriskofdam surfaceconstructionmachinerybasedonlarge - scenevideosurveillance.First,
basedonTrajectron ++algorithm,thetrajectorypredictionofmulti - typeconstructionmachinerywithlargequanti
tyinthefutureperiodoftimeinthelarge - scenevideosurveillanceofthedamsurfaceisrealizedthroughtransfer
learning ;then,thedriveproximitytimeandmaximumcrowdednessofmachineryareproposedasthequantitative
indexesofthepotentialcollisionriskoftheconstructionmachineryonthedamsurface ,andthefuzzymembership
functionofpotentialcollisionriskgradedwarningunderdifferentdrivingspeedsofconstructionmachineryisestab
lishedbasedonthefuzzyrules ;finally,thewarningresultsofthetwoindicatorsarefusedwithevidencefusion
theorytoobtainthefinalwarninglevel.Theproposedmethodistestedonthelarge - scenevideosurveillanceofthe
Lianghekoudam construction site.Theaveragedisplacementerrorand thefinaldisplacementerrorofthe
trajectorypredictionoftheconstructionmachineryonthedamsurfaceinthenext6secondsare1.17and2.36m ,
respectively,andthefuzzy - evidencefusion - basedpotentialcollisionriskgradingwarningresultsoftheconstruc
tionmachineryprovideanautomatedandintelligentanalysismethodfortheconstructionsafetyofthedamsurface.
Keywords:constructionmachinerysafety;large - scenevideosurveillance;trajectoryprediction;fuzzy - evidence
fusion ;gradedwarning
(责任编辑:韩 昆)
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