简介:Itisconsiderednecessarythatanadditionaltermrepresentingthedirectsoundbeintroducedintotheclassicalnormalmodesolutionofsoundfieldinenclosures,toaccordwithpracticeandtomaketheformu-lamoreuseful.
简介:Itisfoundthattheopencompositetrapezoidalformulaearethebestquadratureformulaeunderthreedifferentsenses.
简介:Inthispaperweobtainedgeneralrepresentationformulaeforstronglycontinuouscosineoperatorfunctionsviaprobabilisticapproach,whichincludeWebb’s[1]andShaw’s[2]formulaeandsomenewoneasspecialcases.Wealsogivethequantitativeestimationsforthegeneralformulae.
简介:TheBacklundtransformation(BT)forafifthorderKdVequationispresentedinthebilinearform.Furthermore,anonlinearsuperpositionformularelatedtotheBTobtainedaboveisprovedrigorously.Bytheway,anonlinearsuperpositionformulaofamodifiedfifthorderKdVequationisalsogiven.
简介:Inordertoevaluatethevalidityofcommonlyusedformulaedescribingerosionanddepositionofcohesivesedimentsfortheirapplicationwithinnumericalsimulations,acombinedexperimentalandnumericalinvestigationiscarriedout.Anannularflumeisusedforexperimentsonerosionanddepositionofreservoirmuds.Theresultsoftheseexperimentsserveasvalidationdatafortheformulaeinconsideration.Forthisvalidation,theexperimentsarereproducedwithinanumericalsimulation,whichconsistsoftwoparts:Inafirststep,theflowintheannularflumeissimulatedwithina3Dlargeeddysimulation.Theflowfieldsobtainedinthesesimulationsthenserveasinputforthesecondstep,adecoupled2DVsimulationoferosionanddepositionprocessesduringtheexperiments.TheinvestigatedformulaearethoseofPartheniadesandParchure&MehtaconcerningerosionandofKroneandRichardson&Zakiconcerningdeposition.
简介:Weconsiderthecomputationofthe.Cauchyprincipalvaluemtegralbyquadratureformulaeofcompoundtype,whichareobtainedbyreplacingfbyapiecewisedefinedfunctionF,[_f].Thebehaviouroftheconstantsmtheestimateswherequadratureerror)isdeterminedforfixediandwhichmeansthatnotonlythe.order,butalsothecoefficientofthemaintermofisdetermined.Thebehaviouroftheseerrorconstantsiscompared-withthecorrespondingonesobtainedforthe.methodofsubtractionofthesingularity.Asitturnsout,theseerrorconstantshave,ingeneral,thesameasymptoticbehaviour.
简介:Avariationaltechnique(VT)isappliedtoestimatesurfacesensibleandlatentheatfluxesbasedonobservationsofairtemperature,windspeed,andhumidity,respectively,atthreeheights(1m,4m,and10m),andthesurfaceenergyandradiationbudgetsbythesurfaceenergyandradiationsystem(SERBS).Themethodfullyusesallinformationprovidedbythemeasurementsofairtemperature,wind,andhumidityprofiles,thesurfaceenergybudget,andthesimilarityprofileformulaeaswell.DatacollectedatFeixiexperimentstationinstalledbytheChinaHeavyRainExperimentandStudy(HeRES)Programareusedtotestthemethod.Resultsshowthattheproposedtechniquecanovercomethewell-knownunstablilityproblemthatoccurswhentheBowenmethodbecomessingular;incomparisonwiththeprofilemethod,itreducesboththesensitivitiesoflatentheatfluxestoobservationalerrorsinhumidityandthoseofsensibleheatfluxestoobservationalerrorsintemperature,whiletheestimatedheatfluxesapproximatelysatisfythesurfaceenergybudget.Therefore,thevariationaltechniqueismorereliableandstablethanthetwoconventionalmethodsinestimatingsurfacesensibleandlatentheatfluxes.
简介:Ⅰ.INTRODUCTIONANDBACKGROUNDIntheintroductionofherrecentbookonUr-NammaintheSumerianliterarytradition,E.Flckiger-HawkeroffersacomprehensiveaccountandsummaryofthepreviousscholarshipofthecomplicatedpoliticalhistorybetweenthefalloftheAkkadianempireandthebeginningoftheUrⅢperiod.Fromthisaccount,itbecomesclearthatthisscholarshipprimarilyreliesonvariousinterpretationsof
简介:Theestimationofglycemicindex(GI)ofrice-basedmixedmealeitherbyusingpredictedGI(GIpred)oradjustedGI(GIadj)formulaisunclear.ThisstudyaimedtodeterminetheglycemicresponseofriceinricealoneormixedmealsandtoidentifytheappropriateformulaforestimatingtheGIofrice-basedmixedmeals.Theglycemicresponsesproducedbythericealone(redrice,fragrantwhitericeorparboiledrice)andtherice-basedmixedmeals(friedredrice,friedfragrantwhitericeorfriedparboiledrice)whichprovided25gavailablecarbohydratewereassessedin11healthyindividuals.TodeterminethemeasuredGI(GImeasured)ofricealoneandrice-basedmixedmeals,participantsunderwentthreerepeatedtestsofareferencefood(Glucolin?).Testswereperformedinrandomorderonnineseparatevisitsafteranovernightfastingforatleast8h.Capillaryglucoseatbaseline(0min),15,30,45,60,90and120minfromstartingthemealswasassessedandusedtodeterminetheincrementalareaunderthecurve(iAUC120).TheagreementbetweenGImeasuredandtheestimationformulae(GIpredorGIadj)weredeterminedusingBland-Altmananalysis.TheiAUC120afterconsumingricealonewassignificantlyhigherthantherice-basedmixedmealsexceptforfriedfragrantrice,whichwascomparabletothericealone(P>0.05).TheGImeasuredvaluesofricewerecategorizedasmedium(61forparboiledrice,67forfragrantwhiterice,and68forredrice).GIpred(r=0.40,P<0.01)andGIadj(r=0.41,P<0.01)weresignificantlycorrelatedwithiAUC120.TheagreementbetweenGImeasuredandGIadjisapparentsuggestingtheusefulnessofGIadjinestimatingmealGIofrice-basedmixedmeals.