简介：1.TheregionincludesavastpartofSE.China,NW.Burma,N.VietnamandN.Laos’Itisaheterogeneousandverycomplicatedtectonicprovince.TheretookplaceactiveintracontinentalgeodynamieproccsscsofIndosinianYanshanianandHimalagunteetoniccycles.Assupposed,Varicdirectedmovementsoflithosphericblocks,aswellastheirinteracti

简介：一、教学内容本单元以万圣节为话题展开对话，本节课是第四单元的第一课时，主要是学习PartA的对话。

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简介：被西方称之为“鞭鞑者”（Flogger)的MiG-23是米格家族里的第三款声速战斗机，与MiG-25同属俄制第三代战斗机，虽然它的制造数量和知名度不如其前辈MiG-21“鱼窝”（Fishbed)系列，不过，作为第一款变后掠翼俄制战斗机，加上得MiG-23系列高达5047架的总生产量、出口超过2000架、20余个国家使用等优异纪录，使得“鞭鞑者”战斗机在现代战斗机发展史中占有着重要地位。

简介：在备课和课堂教学中,经常会发现,把一堂课中的每个教学环节自然、流畅地融合和衔接在一起是一件很困难的事,尤其是想把一节课如同讲故事般行云流水地上完,是煞费脑筋的。笔者的这节课正是基于以上一点,力求做到课堂和线索的完整性。

简介：在数字方法的帮助下，在旋转的洞以内的流动地和它的伴随的损失机制在1二的st部分分开纸。便于比较，旋转洞进一步作为转子定子洞案例和转子转子洞被分类大小写。除了流动近围之外，结果作为inviscid流动在两种洞行为以内显示那流动，附近更低的G区域并且在旋转的孔的附近。在除了如此的inviscid-flow-dominate领域的区域，理论核心旋转因素能安全地被用来在洞以内预言swirl比率。当详细流动模式被考虑时，Ekman类型流动在在哪儿的表面边界层的圆周附近存在粘滞效果是非可以忽略的。由于模仿的洞案例的复杂侧面，然而，旋涡结构在洞以内被改变。由比较，打漩比率能被用来预言损失的大小。由于转子转子洞的相对明显的旋转效果，打漩比率甚至在当前的模型增加到1.4，它比包围圆盘快意味着那流动是动人的。进一步的调查发现这种高度旋转的流动伴有严肃的不受欢迎的压力损失。不同于它的对应物，插句地打漩当液体通过转子定子洞时，超过1.0的比率不发生。如此的结构设计什么时候是不可避免的，因此被建议有附加里面的throughflow的转子转子流动洞应该在引擎设计被避免或某些大小应该被提供。自从这些维的参数在state-of-art的设计是典型的，在当前的纸做的模拟是有意义的。Re和Cw的相对更低的范围没在二部分糊的水流被考虑。

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简介：Anewlightninglocatingtechnology,calledLightningMappingArray(LMA),hasbeendeveloped.ThesystemtakesadvantageofGPStechnologytomeasurethetimesofarrival(TOA)oflightningimpulsiveveryhighfrequency(VHF)radiationeventsateachremotelocation.Thespatiotemporaldevelopmentprocessesoflightningaredescribedinthree-dimensionbymeasurementofthesystemwithhightimeresolution(50ns)andspaceprecision(50-100m).Thechargestructuresinthunderstormandtheirrelationshipwithlightningdischargeprocessesarerevealed.Thetemporalandspatialcharacteristicsofpreliminarybreakdownprocessinvolvedinnegativecloud-to-ground(CG)lightningdischargesareanalyzedbasedonthedataoflightningVHFradiationevents.TheeffectofpositivechargeregioninlowerpartofthunderstormontheoccurrenceofnegativeCGlightningdischargeisdiscussed.TheresultsindicatethatthepreliminarybreakdownprocesswithlongerdurationinnegativeCGlightningdischargesisanintraclouddischargeprocess.Itoccursbetweennegativeandpositivechargeregionslocatedinmiddleandlowerpartsofthunderstormrespectively.Itinitiatesfromthenegativechargeregionandpropagatesdownward.Afterpropagatingintothepositivechargeregion,thelightningchanneldevelopshorizontally.Thecharacteristicsofthepreliminarybreakdownprocessareconsistentwiththatofintracloudlightningdischarges.ThesteppedleadersareinitiatedbytheKtypebreakdownwhichoccursinthelaststageofthepreliminarybreakdownprocessanddevelopsdownwardthroughthepositivechargeregion.TheexistenceofpositivechargeregioninlowerpartofthunderstormresultsintheoccurrenceofpreliminarybreakdownprocesswithlongerdurationbeforethereturnstrokeofnegativeCGlightningdischarges.

简介：Basedonrigid-plasticfiniteelementmethod,askewrollingprocessofsteppedpartissimulated.Consideringnodesavingandeffectiveremeshing,thetetrahedronsolidelementsareusedtodiscreteworkpiece.Theworkpiecematerialadoptsrigid-plasticmodel,wheretheflowstressisfunctionofeffectivestrain,effectivestrainrateandtemperature.Thethermomechanicalcouplingisconsideredinthesimulation.Tomodelthespinningworkpieceundergoingplasticdeformation,anovelsolutionispresentedandappliedinthispaper.Thestressstateintheworkpieceandformingcharacteristicofskewrollingareanalyzed.Theformingload,includingrollertorqueandforcesinthreedirectionsarepredicted.Theaboveanalysesarehelpfultounderstandingofformingmechanismsandimprovingofprocessanddiedesign.

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简介：On18November2012,about3,000volunteerscomposedofstafffromnearly20foreigncompanies,studentsfromuniversitiesinBeijing,primaryschoolstudentsandcitizensregisteredthroughthenetworkparticipatedintheLongWalkinBeijingOlympicForestParkandraiseddonationofRMB133,000.Thedonationwouldbeusedtoprovide10,000eggs,50,000cattyofpotatoesandotherwinterfood,and100sportsequipmentpackagesto100schoolsattendedbychildrenofmigrant

简介：Understeady-stateconditions,thegeneralcurrentsofEEreactionsatdisk,hemisphericalandsphericalmicroelectrodesarederived.Fromtheseequations,someelectrodereactionparameterscanbeverysimplyobtained.

简介：有一般公式的1,10-phenanthroline(phen)的铈，镨和钕的硝酸盐建筑群[行(phen)2(NO3)2(H2O)2]·NO3(在哪儿，Ln=Ce，Pr和Nd)被X光检查晶体学准备并且描绘。这些建筑群的Thermolysis被同时的thermogravimetry(TG)和微分热分析(DTA)调查。等温的TG被拿用模型适合评估运动参数以及为免费isoconversional方法建模。thermolytic小径也被建议，它包含点火跟随的分解。所有三建筑群有第十期协作并且显示出multistep分解。以便评估快速的加热的反应，点火延期(Di)大小被承担。为点火的激活精力被发现在顺序减少：Nd>Pr>Ce。

简介：这是介绍造面向轨道的道路网络数据模型的一个一般背景的报纸的第一个一三部分的系列，包括动机，相关工作，和基本概念。系列的目的是开发一个trajectory-orientedroad网络数据模型，也就是基于carriageway的道路网络数据模型(CRNM)。第1部分处理当模特儿的背景。第2部分建议CRNM的原则和建筑学。部分3investigates在案例研究的CRNM的实现。在现在的纸，管理轨道数据的挑战被讨论。当一个解决方案和存在道路网络数据模型被考察，然后，开发面向轨道的道路网络数据模型被建议。一个道路网络的Basicrepresentation途径象它的体质一样被介绍。

简介：Calc-alkalinegranites(excludingA-andM-type)couldbedividedintotwopetrogenicseries,I,e,thesyntexisseriesandthetransformationseriesaccordingtotheirgeneticmechanisms.InthelightofthisclassificationwefoundthatgranitesofthesetwoseriesoftenaligneinpairedzonesparalleltocontemporaneousB-typeorintracontinentalcompression-subductionzoneswithinascendedslabs,re-sultinginaregularzonalpatterntogetherwithsubductionzones.Thus,theyaredefinedastwingranitebelts.Accordingtothespatialrelationsbetweenthegranitebeltsandthesubductionzones,thetwingranitebeltscouldbeclassifiedasA,ABandB-type.ThezonationofgranitesofthetwoseriesinthenorthernpartoftheEastQinlinareacouldbecitedasatypicalexampleofA-typetwingranitebeltsrelatedtotheYenshanianintracontinentacompression-subductionmovementinthearea.InthispaperthetectonicsettingsandpetrogenicfeaturesofthetwingranitesbeltsinEastQinlinaresystematicallydescribed,andatectonicmodelforgraniticmagmagenesisinintracontinentalcompression-subductionenvironmentshasbeenproposed.Inthismodeltheforma-tionofA-typetwingranitebeltsiscloselyconnectedwithtectonicmovementsintermsoftheprince-ple,ruleanddynamicsofmaterialdifferentiationinthelithosphere.

简介：TheEastKunlunfaultzoneislocatedinthenorthernmarginoftheBayanHarblock.ThestudyofearthquakerupturebehaviorinthefaultzoneisofimportanceforunderstandingthefutureseismicriskinnorthwestSichuan.Anumberofgeologicalfieldinvestigations,typicalmicrotopographyDGPSmeasurementsandsampledatingshowthattheearthquakeactivityoftheEastKunlunfaultzoneextendstothenorthboundaryofZoigebasin,asegmentknownastheLuochasegmentofTazangfault.Inthesatelliteimage,thesegmentisseenclearlyasgrayandyellowstrips.Theearthquakedeformationzonemainlyfeaturesfaultscarp,valleysontheslope,offsetgulliesandterraces,lineardistributionofplants,waterfall,faultspring,faultsagpond,andlandslide,collapseandtalusassociatedwithsurfacerupturing.Thesephenomenaaredistributedintermittentlyalongthere-existingfaultandforma～50km-longinverseL-shapeddeformationzone.Faultactivitiescausedleft-lateraloffsetofgulliesandterraces,withhorizontaldisplacementconcentratedat5.5m~6m,18m～23m,68m～75m,and200m～220m,respectively.Therecentearthquakeoccurredbetween340±30～500±30BP.Themacroepicenterislocated5km～7kmnorthwestofBenduovillage,withmagnitudeofMW7.3～7.4,maximumcoseismicdisplacementof6m,horizontaldisplacement5.5m～6mandverticaldisplacement0.2m～0.5m,beinginaproportionof5∶1～10∶1.ThesephenomenashowthattheTazangfaultisthecausativefaultofthisearthquake.ThefaultisaHoloceneactivefaultandwasdominatedrecentlybyleft-lateralmovementwithasmallamountofthrustcomponentundercompressiveshearstress.ThischaracteristicissimilartothemovementinothersegmentsoftheEastKunlunfaultzone.Theresultsofthisstudysupportthe"continentalescape"model.

简介：TheexistenceanduniquenessofastrongperiodicsolutionoftheevolutionsystemdescribinggeophysicalflowinboundeddomainsofRN(N=3,4)areprovenifexternalforcesareperiodicintimeandsufficientlysmall.

简介：部分地，聪明切割的过程，缺陷由尺寸描绘了的结合的效果和在切开前后的内部压力上的2纸被使用破裂力学模型学习。有大尺寸的结合的缺陷是容易的引起缺点生长的严重偏差，这被发现，当切开时，导致薄层的一个非转移的区域。在结合的缺陷的内部压力是很小的一个实际聪明切割的过程，大界面的缺点总是在切开的过程支持缺点生长。同时，增加结合的缺陷的内部压力减少在切开前的缺点生长和它的偏差。stiffener限制的松驰的机制被建议澄清结合的缺陷的效果。而且，当结合的缺陷是在场的时，切开的过程的进步被分析。在切开以后，有大尺寸和高内部的压力的那些结合的缺陷在高温度的退火期间为薄电影的blistering是脆弱的。

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