简介：Nonlinearmetailogenicdynamicsisoneofthodifficultprob1emsthatcommonlyfacemoderncom-plcxscicnces.TheRussianfamousmetallogenjstA.D.Shcbeglov(1988)paidattentiontotheprob1emofnonlin-earmctal1ogenyandproposedthcconceptofnonlinearmcta11ogeny.HepointedoutthatthercjSane-cessityofamoredetailedandcomprchensive

简介：Anewflowtheoryisestablishedthroughtheobjectivityrequirementonthefluiddynamics.Itwasknownthatinhomogeneousfluidmotiongaverisetoviscousforcewhiletheselectionofobserversondifferentspace-timepointswouldchangesuchaninhomogeneouscharacter.Therefore,whentheviscousforcewasconsideredasanobjectiveexistenceforeigntotheselectionofobservers,theforminvariancesofviscousforceandmomentumequationunderlocalrotationtransformationrequiredanewdynamicfield,namelythevortexfieldtobeintroduced.ThenthedynamicalequationsofallflowfieldswereobtainedthroughconstructingtheLagrangiandensityoffluidsystemandusingthevariationalapproachofenergy.

简介：Thispaperstudiestheiterationsofholomorphicself-mapswhichhavenonwanderingpointsovergeneralpseudoconvexdomainsisC^2.TheauthorsgiveespeciallyaDenjoy-Wolff-typetheoremonpseudoconvexdomainswithreal-analyticboundaries,orevenmoregeneral,ondorpainsoffinitetype.

简介：TherelationshipbetweendissolutionrateandpHisdeterminedbycarryingoutdynamicexperimentsofhedenbergiteandgrossularitedissolution.Thedissolutionreactionequationsareestablished.Thedissolutionpro-cessesoftwomineralsaresimulatedbyusingthetheoryofmulti-phaseandmulti-componentchemicalequilibrium.Theresultsbringlighttothemechanismofdissolutionprocesses.Duetoincongruentdissolutionoftwomineralswhenthedissolutionprocessesreachametastablesupersaturationcriticalpointnewmetastablemineralscanbeformedinthesystem.TheexperimentsshowedthatdissolutionofgrossulariteandhedenbergiteconsumesH~+andthenmakespHvalueofsolutionhigh.Inturn,precipitationofmetastablemineralsmakespHvaluelow.Precipitationofmetastablemineralshasacatalyticeffectfordisso-lutionofreactingmineralsinspecialtime.PrecipitationanddissolutioncarriedoutalternatelyinthesystemanditcausesperiodicoscillationofpHvalueswithreactingtime.Thisisthe

简介：ＯｎＳｏｄｉｕｍＣｌｕｓｔｅｒＣｏｌｌｉｓｉｏｎＤｙｎａｍｉｃｓＯｎＳｏｄｉｕｍＣｌｕｓｔｅｒＣｏｌｌｉｓｉｏｎＤｙｎａｍｉｃｓ￥ＺｈａｎｇＦｅｎｇｓｈｏｕ；Ｅ．ＳｕｒａｕｄａｎｄＲ．ＧｌｏｗｉｎｓｋｉＡｄｉｓｔａｌｌｃｅ－－ｄｅｐｅｎｄｅｎｔｔｉｇ...

简介：Faultisacomplexdynamicsystemcontrolledbythecouplingofrocktexture,reaction,fluidflow,stress,androckdeformationmechanism.Acoupledreaction-transport-mechanicaldynamicmodelforfaultsystemisestablishedanddescribedinthispaper.AnexampleispresentedfortheShuikoushandeposit,Hunan.Theresultsofdynamicsimulationindicatethattheevolutionandmagnitudeoffracturepermeabilityofdifferentrocksaredifferent,andthatfaultingcanenhancethespatialheterogeneityofrockpermeabilityandfacilitatefluidflowandmineralizationinlocalfaultzone.Thepressureforafaultusuallyshowsavariationmodeofaperiodicoscillationwithtime,whichreflectsthechaoticbehavioroftheevolutionofafault.

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简介：Forthedynamicsofarigidbodywithafixedpointbasedonthequaternionandthecorrespondinggeneralizedmomenta,adisplacement-basedsymplecticintegrationschemefordifferential-algebraicequationsisproposedandappliedtotheLagrange’sequa-tionsbasedondependentgeneralizedmomenta.Numericalexperimentsshowthatthealgorithmpossessessuchcharactersashighprecisionandpreservingsysteminvariants.Moreimportantly,thegeneralizedmomentabasedLagrange’sequationsshowuniquead-vantagesoverthetraditionalLagrange’sequationsinsymplecticintegrations.

简介：我们构造其进化收敛到一个一般方形的矩阵的特徵向量的动态系统的一个家庭，不是必然对称。我们分析那些系统的集中并且执行数字测试。有力量方法的一些例子和比较被举。

简介：Thispapergivesfourpairsofentropies(η_i,q_i)(i=1,2,3,4)totheisentropicgasdynamicsequationsρ_t+(ρu)_x=0(ρu)_t+(ρu~2+p(ρ))_x=0p(ρ)=k~2ρ~γ,1<γ<3。whenallthefunctionequationsaresatisfied

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简介：Theseaicecoverdisplaysvariousdynamicalcharacteristicssuchasbreakup,rafting,andridgingunderexternalforces.Tomodeltheicedynamicprocessaccurately,theeffectivenumericalmodelingmethodshouldbeestablished.Inthispaper,amodifiedparticle-in-cell(PIC)methodforseaicedynamicsisdevelopedcouplingthefinitedifference(FD)methodandsmoothedparticlehydrodynamics(SPH).Inthismethod,theicecoverisfirstdiscretizedintoaseriesofLagrangianiceparticleswhichhavetheirownsizes,thicknesses,concentrationsandvelocities.TheicethicknessandconcentrationatEuleriangridpositionsareobtainedbyinterpolationwiththeGaussianfunctionfromtheirsurroundingiceparticles.ThemomentumoficecoverissolvedwithFDapproachtoobtaintheEuleriancellvelocity,whichisusedtoestimatetheiceparticlevelocitywiththeGaussianfunctionalso.Thethicknessandconcentrationoficeparticlesareadjustedwithparticlemassdensityandsmoothlength,whichareadjustedwiththeredistributionoficeparticles.WiththeabovemodifiedPICmethod,numericalsimulationsforicemotioninanidealizedrectangularbasinandtheicedynamicsintheBohaiSeaarecarriedout.ThesesimulationsshowthatthismodifiedPICmethodisapplicabletoseaicedynamicssimulation.

简介：Reactionergodographyfortheadditionoflithiumhydridetoacetyleneindicatesthatthelithiumhydride,inbothmonomericanddimericforms,reactswiththeacetyleneviatwosimilarandcompetitivepathways.Hence,wehaveobtainedthepseudo-first-orderrateconstantofthisreaction.

简介：Wepresentthesimulationofthedynamicsoffluid-cylinderinteractionsinanarrowthree-dimensionalchannelfilledwithaNewtonianfluid,usingaLagrangemultiplierbasedfictitiousdomainmethodologycombinedwithafiniteelementmethodandanoperatorsplittingtechnique.Asexpected,asettlingtruncatedcylinderturnsitsbroadsideperpendiculartothemainstreamdirectionandthecenterofmassmovestothecentralaxisofthechannel.Inthecaseoftwotruncatedcylinders,theyfirstmovearoundeachotherforawhileandthenstaytogetherina"T"shape.Afterthe"T"shapehasbeenformedforalongenoughtime,wefoundnovortexsheddingbehindthecylinders.Whensimulatingthefluidizationof60truncatedcylinders,wecapturedthefeaturesofinteractionsamongfluidizedcylindersasobservedinexperiments.

简介：Dreippingelectrolytesintosilicasol,gellingreactionwilloccur,Theresearchindicates:thisisacomplicatedphysicemistrycourse,whichconsistsofapre-reactionandapolymerizaion,Theformercontrolsthewholecourse,andinwhichelectroniclayersofthesol'sparticlesbe-comemoreandmorethiner,butwithincresingofthesolconcentration,itscontrolforcewillbediminished,tillthefast-coagulation,thegellingcousebecomeso-controlled,Thelatterisanin-finitepolymericchani-reaction.Theresultofgelatinationistoproduceaverybigplymericmolecule-gel,whichinvolvesinallspace,includesallwater,anditsmolecularweightisin-definitebig.Theresearhalsoindicates:thedy-namiccourseofthegellingcouldbedescribedquantitaivelybyanexperienceformula:lgt=-nlgc+B,Allofthecharacteristicvalueshavedefinitephysicalmeaning,Electronicvalueofthecontrary-inosisthebiggestinfluentialfactor,thenaturesofthecontrary-ionsandthenaturesofthesame-electronic-inoshaveafewinfluentialforcesonthecharacteristicvalues,Thetemperatureincreasingmakesthegellingreactionfast.

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简介：为了改进表面的用机器制造的精确磨擦，用机器制造，有高效的amicropositioning细工品桌子被用作辅助在喂机制实现纳米水平放和动态赔偿。为了更好理解磨擦机器的特征，与微放调制了细工品桌子，磨擦系统的动态模型与形式的合成和Lagrange被建立“s方程方法。磨擦系统被划分成五个分系统。为每个分系统，概括运动学并且势能被获得。因此，磨擦系统的动态模型在形式的域被给。磨擦过程的起浪基于车轮和细工品颤动被完成。有微分追踪者的一个非线性的比例的不可分的衍生物(PID)控制器被开发认识到动态控制。模拟结果证明细工品的用机器制造的精确性能被利用微放细工品桌子实现动态赔偿有效地改进。试验性的测试被执行验证建议方法，并且细工品的起浪能从0.46下午被归结为0.10亩m。

简介：Objective:ToinvestigatethedynamicsofplasmacAMP/Cgmpinpatientsduringcardiacsurgery,anditsrelationshiptotraumaticstress.Methods:Sixteenpatients,aged19.31years±10.4years,whounderwentanopenheartoperationwithcardiopulmonarybypass(CPB)andhypothermiawereservedassubjects.Thearterialplasmaconcentrationsofcyclicadenosinemonophosphate(Camp)andcyclicguanosinemonophosphate(Cgmp)weremeasuredbyradioimmunoassay2hoursbeforeoperation,afterheparinization,20minutesfollowingCPB,attheendoftheoperation,and24and72hourspostoperatively,respectively.Thepatients'preoperativebloodsampleswereheparinizedandthevenousbloodsamplesof30healthyblooddonorsweretakentomeasurethelevelsofCampandcGMPasheparinandnormalcontrolsseparately.Results:Therewerenostatisticaldifferenceamongtheheparincontrol,preoperativelevelandnormalcontrol.ThepeakvaluesofCampandCgmpoccurredduringCPBandplasmaCamplevelschangedsynchronouslywithintensitiesofoperativestimulustohumanbody.HowevercGMPlevelwasmainlyrelatedtotheoperativestimulustotheheartandCPB.TheCampvaluewaspositivelycorrelatedwiththeCgmpvalue(r=0.6313,P＜0.001).Conclusions:Dynamicvariationofplasmacyclicribonucleotidecanbeconsideredasareferenceparameterforintensityoftraumaticstress.

简介：Moeculardynamicssimulation(MDS)isusedtostudythethermodynamicpropertiesandtransportcoefficientsofanargonsystemwithLennend-Jonespotential.Theresultsonthevelocitydistribution,meanfreepath,meancollisontime,specificheatandself0diffusioncoefficientagreewellwiththeexistingtheoretical/experimentaldata,Itshowsthatmoleculardynamicsmethodisanotherbridgetoconnectmicroworldandmacreoworld.

简介：Organizedby:BeijingNormalUniversity,NationalNaturalScienceFoundationofChinaHostedby:InstituteofResourcesScience,BeijingNormalUniversityKeyLaboratoryofEnvironmentalChangeandNaturalDisaster,MinistryofEducationofChinaTopics:1)DetectingandmonitoringLUCC2)Temporal-spatialcharacteristicsinLUCC3)DrivingmodelforLUCC4)ForecastingandmodelingLUCC5)PhenologicalandbiochemicalresponseonLUCC6)RegionalLUCCandmicroclimate7)LUCCinthecontextofglobalchange8)Impactofglobalchangeonthesustainableland-usemodelingAbstractsubmission:TheofficiallanguageofthisconferenceisEnglish.WeinvitepaperswritteninEnglishandanabstractoflessthanonepageofstandardA4sizetotheConferenceSecretariatbyApr15,2001.RegistrationFee:280US$(300US$afterJuly15,2001)Add：No.19,XinjiekouwaiStreet,100875,InstituteofResourcesScience,BeijingNormalUniversity,Beijing,ChinaTel：86-10-62207656or62209024Fax：010-62208178http://202.112.93.50/LUCCD2001/index.htmlE-mail:Pwang@bnu.edu.cnCyh@bnu.edu.cn