简介:Macro-trafficmodelisaneffectivetoolforsupportingtrafficprogrammertoThisarticleisbasedonthesoftwareproductsVISEM(demandmodel)andVISUM(supplymodel)fromPTVCompanyofGermany,andstudiesmacro-trafficmodelonthebasisofconsideringthattrafficsystemisaninteractivesystemofbetweenasupplysystemandademandsystem.
简介:Carbonnanotubemacro-filmsaretwo-dimensionalfilmswithmicrometerthicknessandcentimeterbycentimeterin-planedimension.Thesecarbonnanotubemacroscopicassemblieshaveattractedsignificantattentionfromthematerialandmechanicscommunitiesrecentlybecausetheycanbeeasilyhandledandtailoredtomeetspecificengineeringneeds.Thispaperreportstheexperimentalmethodsonthepreparationandcharacterizationofsingle-walledcarbonnanotubemacro-films,andastatisticalmechanicsmodelon...
简介:为形式的闲差事分析过程,模特儿由Ghobarah等求婚了。(此后打电话给G模特儿,1999)被扩大了说明对充分的理由运动激动的结构的全球地震损坏的短暂更高的模式的贡献。建议模型身体上并且完美地衔接了G模型,最后的弄软模特儿由DiPasquale和Cakmak(1988)求婚了。相应于所有考虑颤动模式的形式的损坏索引被CQC规则或SRSS规则联合。增长动态分析(IDA)在三个例子RC框架上被执行验证建议模型,并且全面比较被执行。示范显示建议模型是安逸的实现并且在结构的损坏进化上在短暂颤动时期和模式反映转变的影响。与建议模型联系的一些限制也被探讨。进一步试验性的确认被需要以后改进模型。
简介:Themacroandmicrocloudphysicsstructuresandtheirevolutionwithtimearethecoreofdescribingcloudfieldsinessence.Theyarenecessaryatmosphericenvironmentnotonlyinaviationandspaceflightactivitiesbutalsoforatmos-phericradiationtransferandacidrainformationresearch.Unfortunatelyitisdifficulttoobtainanentireenvironmentalcloudfieldbyusingobservationmethodsdirectly.Thus,byuseofcomputationphysicsmethodtobuildacloud-systemmodelmaybeanindispensablewayforthistopic.Thispaperpresentedacloud-systemmodelforthisgoal,andsimu-latedarealcase.Theresultsofcomputationshowedthatthemacrostructureofthecloudfieldwasbetterconsistentwithrealobservation,andthemicrostructurewasfairlyreasonable.Theoutputofmodelcouldprovidealltheinformationaboutthecloudfield:(1)size-distributionspectrumofhydrometeorparticles(point),(2)verticalprofile(line),(3)hori-zontalorverticalsectionofmacroandmicroparameters(surface),and(4)cloudcover,patternofcloudandconfigura-tionofcloud,etc.(body).
简介:
简介:这篇论文试图基于充分温度地,集中地和速度地联合与模仿微观结构形成微动力学。作者介绍了一个新方法,它是频分多路复用和细胞的自动机(CAFD)的联合设想片由真空投资过程扔了的薄复杂超级合金汽轮机的微观结构形成。异构的成核的分发,取向和机制,树突的生长动力学并且对equiaxed转变(CET)圆柱被考虑。利用这些模仿的计划,谷物的规模和一致性上的关键进程变量的全面影响被调查了份量上。模仿的谷物尺寸和形态学与试验性的结果同意很好。
简介:TherecoveryofAubyactivatedcarbonfibers(ACFs)wascarriedoutina40mmdiameter,1200mmheightfluidizedbedTheratesofreactionofthefunctionalfiberswithAu3+inthepureaurumsolutionandintheaurum-containingwastewaterweremeasuredrespectivelyatthedifferentsolutionfiowrates,andcomparedwiththeresultsunderthestaticsolutionconditions.Experimentalresultsindicatedthatthereactionratesinfluidizationarenotablyhigherthanthoseinthestaticstateandincreasewiththeincreaseofsolutionflowrate.Itdemonstratesthatthethicknessoftheconcentrationboundarylayerisdecreasedandauniformtemperaturefieldisestablishedinthebedduetoincreasingoftheturbulentextentwiththerelativefiber/solutionvelocity.
简介:Adailydistributedhydrologicalmodelwasdevelopedusingroutinehydro-meteorologicaldataonthebasisoftherasterDEMandlandcoverdata.ThenthemodelwasusedtomodeldailyrunoffoftheDatongRiverValleylocatedintheuppercatchmentoftheYellowRiverBasin.Therunoffcomprisessurfaceflow,subsurfaceflowandgroundwaterflow.Evapotranspirationcomprisescanopyevaporation,snowsublimationandsoilevapotranspiration.TheinfiltrationtothesoilwasestimatedwithimprovedGreen-Amptmodel,andthepotentialevapotranspirationisestimatedwithMortonCRAEmethod,whichonlyneedstheroutinemeteorologicaldata.Simulationresultsandthecomparisonwithsemi-distributedSLURPhydrologicalmodelshowthatthestructureofthemodelpresentedhereinisreasonable.
简介:为对在装载的轮船影响下面的桥结构的动态需求评价,收养与合理精确性允许快速的分析的分析模特儿可能是谨慎的。此处,一个非线性的动态宏元素被建议并且实现了确定桥基础的需求使遭到了装运碰撞。在建议非线性的宏元素,在平行的一个有弹性塑料的弹簧和缓冲筒的联合被采用与紧张率效果描述轮船鞠躬的机械行为。用建议宏元素基于分析模型,在5000死重吨位(DWT)下面的一个典型基础轮船碰撞被讨论。我们的分析显示用非线性的宏元素的结构的回答从高分辨率模型同意结果,但是建议方法的效率和可行性在实际应用程序显著地增加。而且,在一些当前的设计代码(AASHTO,JTGD60-2004,和TB10002.1-2005)之间的比较和发达动态分析方法建议这些设计代码可以被改进,到至少在结构的需求上考虑动态扩大的效果。
简介:Inthispaper,aclustermodelinparticleflowcodewasusedtosimulategranitespecimensafterheattreatmentunderuniaxialcompression.Theresultsdemonstratedthatmicro-cracksarerandomlydistributedinthespecimenwhenthetemperatureisbelow300?C,andhavepartialcoalescencewhenthetemperatureisupto450?C,thenformmacro-crackswhenthetemperatureisabove600?C.Thereismoreinter-granularcrackingthanintra-granularcracking,andtheirratioincreaseswithincreasingtemperature.Themicro-cracksarealmostconstantwhenthetemperaturedecreasesfrom900?Ctoroomtemperature,exceptforquartzα–βphasetransitiontemperature(573?C).Thefractureevolutionprocessisobviouslyaffectedbythesecracks,especiallyat600–900?C.Elevatedtemperatureleadstoeasilydevelopeddisplacementbetweenthegrains,andthecapacitytostorestrainenergybecomesweaker,correspondingtotheplasticityofgraniteafterheattreatment.