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简介：Justasthehumancivilizationhasenteredintoanewcentury,sohastheRus-sianFederationarrivedatacriticalturningpoint.TheStateDumaelectionjustconcludedandPresidentBorisYeltsin’sresignationaheadofschedulehaveheraldeddawningofastabilisingRussianpoliticalscene.AsRussiaisstillabigpower,es-peciallyaheavyweightmilitarypower,anynewdevelopmentsinthecountrywouldhaveprofoundimpactupontheinternationalcommunity.Therefore,inwhatdirec-tionRussiawilldevelopinthenewcenturyisaquestionnotonlybeingwatchedcloselybyitsownpeople,butalsobeingfollowedwithgreatinterestbythewholeworld.

简介：Theissuesofwarandpeacecapturedinternationalattentionin2014.ItwasthecentennialofWorldWarI,andthefocuswasontensionsinAsiaforthefirsthalfoftheyear.OneradicalWesternviewwentsofarastocomparetoday'sChinatopre-warGermanyinthemidstofrapideconomicgrowth,risingnationalismandabeefedupmilitary.ThehypeaboutBeijing'sallegedregionalexpansionpeakedattheShangri-LaSecurityForum(Singapore)inMay2014.However,eventsonthegroundprovedsuchglibaccusationswrong.InOctober2014,thisauthoraccompaniedseveralotherChinesescholarsinavisittosevenU.S.thinktanks.OurAmericanhostswerenotworried

简介：旋转中心大厦的灵感来自一件扭动躯干的人体雕塑，高190.4米，共有9个区层，每区层有5层。每区层的方向都跟下面的区层不同，其中最高的一层和最低的一层成直角，看起来整座大厦好像转动了一般。大厦外墙厚度随高度递减，近地面的外墙厚2米，但大厦顶层的墙壁厚度只有40厘米。最底两个区层是办公室，其余7个区层共有150个豪华住宅单位，可容纳约3万人在内工作、居住。

简介：Afterthreedaysofmeeting,G8SummitwasofficiallyconcludedonJuly9thinToyako,HokkaidoofJapan.Thethree-daysummittoucheduponmajorinternationalissuessuchasworldeconomy,global

简介：Thetransitionfromthebiexcitontotheexcitoncanturnoverthedirectionoftheelectricdipoleofapolymericmolecule.Thisturning-overactioncombinedwiththephotoinducedpolarizationreversioncanbeusedasaswitch.Theswitchingspeedisgovernedbytherelaxationtimeoftheturning-overprocess,whichcanbedeterminedbyadynamicalsimulation.

简介：同学们，你们好!让我们一起进入第七单元的学习。在本单元，我们将学习使用“wouldyouminddoing…“来向别人提出建议及要求；谈论自己所抱怨的事，对别人的抱怨表示道歉；了解各个国家的礼仪、社会行为标准的相同点或不同之处。在上学期第十一单元中，我们学习了如何有礼貌地请求别人作某事及向别人提出建议。为这一单元的学习打下了基础，我想同学们一定会学好这一单元的，一定要有信心哦!OK，首先我们来关注一下本单元的语法知识。

简介：拐弯处步法是为类人动物机器人的一个基本运动。这篇论文为类人动物转弯论述一个方法，即钟拐弯处。钟拐弯处的目的是在一个静止的点改变机器人方向。计划的钟拐弯处由四步组成：脚关节轨道产生，新潮的轨道产生，膝轨道产生，和反的kinematics计算。我们的建议方法与12DOF(自由的度)基于典型类人动物结构。钟拐弯处计划的最后的输出是12条引用轨道，它被用来与12DOF控制一个类人动物机器人。ZMP(零个时刻点)作为稳定性标准被使用计划。模拟实验被进行验证我们的建议钟拐弯处方法的有效性。关键词类人动物机器人-拐弯处步法-ZMP-钟拐弯处这个工作被中国(号码60174018)的国家自然科学基础支持。唐哲在湖南省出生了，中国，在1977。他当前是在Nanyang工艺的大学的聪明的系统中心的一个研究家伙。他在清华大学从计算机科技的系收到了学士和博士度，北京中国。他的研究兴趣包括类人动物机器人，聪明的控制。孙增琪在江苏省出生了，中国，在1943。他从自动控制的系收到了学士度，清华大学在1966，并且在从Chalmers工业大学设计的控制的博士度，Gothenburg，瑞典，在1981。他当前是在计算机科学系和技术的一个教授，清华大学。他在控制系统，计算机控制理论，聪明的控制，和机器人学的电脑辅助的设计上是超过200篇论文和八本书的作者或合作者。他的当前的研究兴趣包括聪明的控制，机器人学，模糊系统，神经网络，和进化计算。刘洪波在山东省出生了，中国，在1978。他当前是在在中国北京的清华大学的计算机科技的系的一个博士候选人。他的研究兴趣包括因特网数据采矿和聪明的系统。MengJoo嗯分别地在1985和1988从新加坡的国家大学在电力工程收到了他的学士和硕士学位并且在从澳大利亚的公�

简介：Inthispaper,theSpaceWeatherModelingFramework(SWMF)isusedtosimulatethereal-timeresponseofthemagnetospheretoasolarwindeventonJune5,1998,inwhichtheinterplanetarymagneticfieldshifteditsdirectionfromnorthtosouth.Sincemostcurrentmodelsdonottakeintoaccountconvectiveeffectsoftheinnermagnetosphere,wefirststudytheimportanceofRiceConvectionModel(RCM)intheglobalmodel.Wethenfocusonthefollowingfouraspectsofthemagnetosphere’sresponse:themagnetosphere’sdensitydistribution,thestructureofitsmagneticfieldlines,theareaofthepolarcapboundary,andthecorrespondingionosphericcurrentchange.Wefindthat(1)whentheIMFchangesfromnorthtosouthinthisevent,highmagnetosheathdensityisobservedtoflowdownstreamalongthemagnetopausewiththesolarwind;low-latitudereconnectionatdaysideoccursunderthesouthwardIMF,whilethemagneticfieldlinesinthetaillobecaudal,causedbythenightsidehighlatitudereconnection,extendintotheinterplanetaryspace.Openmagneticfieldlinesexistsimultaneouslyatbothhighandlowlatitudesatthemagnetopause;(2)theareaofthepolarcapisobviouslyincreasediftheIMFturnsfromthenorthtothesouth;thisobservationishighlyconsistentwithempiricalobservations;(3)theionosphericfieldaligncurrentinthenorthernhemisphereisstrongerthaninthesouthernhemisphereandalsoincreasesastheIMFchangesfromnorthtosouth.SWMFwiththeRiceConvectioneffectprovidesreliablemodelingofthemagnetosphericandionosphericresponsetothissolarwindvariation.

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简介：Byusinganalyticgeometricmethod,anewalgorithmisadvancedonquicklocatingforturningpointsindiscretepointsetofplanecurve.Thealgorithmissimpleinstructureandhashighcomputationefficiency,andcanquicklylocateforturningpointsindiscretepointsetofplaneparametercurveaswell.

简介：WewillconsideranextensionofadirectmethodduetoGriewankandReddienforthecomputationofdoublesymmetry-breakingturningpointswhichariseinthetwo-parameterdependentnonlinearproblemoftheformf(x,λ,μ)=0.Themethodproposedcouldproduceanextendedsystemwhichdoesnotintroducethenullvectorsasvariables,andcouldthereforereducethecomputationaleffortandstorage.Onenumericalexampleispresentedtodemonstratethatthemethodisefficient.

简介：Anonlineardifferenceschemeisgivenforsolvingaquasilinearsiagularlyperturbedtwo-pointboundaryvalueproblemwithaturningpoint.Themethodusesnon-equidistantdiscretizationmeshes.ThesolutionoftheschemeisshowntobefirstorderaccurateinthediscreteL^∞norm,uniformlyintheperturbationparameter.

简介：RareearthpriceroseagainassalesheatingupsinceNovember.Sufferedtheoversoldandexperiencedtherecentpositiveandconstantmultiplestimulus,rareearthindustryiswelcomingitsperiodic'turningpoint'.ItisunderstoodthatsomemanufacturersbegantooverhaulinNovemberandtheupstreamproductionwillbereducedcorrespondingly.However,demandsfrommagnetandotherdownstreamindustriesarerelativelystable.Drivenbyrestrictingoutputandnationalreserve,profitabilityofrareearthindustryisexpectedtoimprove.Securities'researchreportsshowthatnationalreserveposedasignificantsupporttorareearthpricesinrecentyears.

简介：大多数淡水鱼擅长转演习。一个模仿的鱼尾巴模型数字地详细被调查并且讨论。这研究处理在鱼尾巴鳍上施加在的不稳定的力量和时刻一起始斜着，击和随后的回来击打手势，并且设想流动领域和旋涡结构，鱼打手势以便探索典型拐弯处的流动控制机理。在相应于在它的C开始的鱼尾巴鳍的二张不同弯曲表格的动态后果被给的液体上推进讨论。Thetwo维的不稳定的不可压缩的海军司烧方程与一个developedpseudo压缩的可能性方法被解决在鱼尾巴鳍附近模仿流动。有实验的计算结果和比较显示那(1)钓鱼用过程展览的往来活动的中风，和每个阶段生产的冲动的时刻执行它的身体的一个转弯的运动它的特定的水动力学特征，(2)鱼采用尾巴尖端拐弯(单个拐弯和两倍拐弯)的二张表格完成C开始拐弯处演习，在他们的物理状况和自然环境的依赖，(3)鱼能由modulating控制它的转弯的运动一些关键运动学的参数。

简介：Theinfluenceofbafflepositiononliquidsloshingduringthebrakingandturningofatanktruckwasstudiedusingavolumeoffluid(VOF)model.Theforces,theirpositionsandweightdistributionduringbrakingandtheforcesandrollingmomentduringturningwerecalculated.Thereliabilityofthecalculationmethodwasvalidatedbycomparisonswithexperimentalresults.Theresultsshowedthatduringbraking,liquidsplashesinthetankandthemaximumforcesandG(theratioofweightactingonthefrontaxletotherearaxle)arelargewhenA(theratioofthearchareaabovethebaffletotheareaofcrosssection)≤0.1.WhenA≥0.2,asthepositionofthebaffleislowered,themaximumofFx(theforceindirectionx)firstdecreasesthenincreases,andthemaximumofFy(theforceindirectiony)andGincrease.Duringturning,liquidsplashesinthetankandthemaximumforcesandM(therollingmoment)arelargewhenD(theratioofthearchareaabovethebaffletotheareaofcrosssection)≤0.2.WhenD≥0.3,asthepositionofthebaffleislowered,themaximumsofFy,Fz(theforceindirectionz)andMincrease.

简介：Inthiscontribution,insideturningofathin-walledcylinderisinvestigatedinsimulation.Self-excitedvibrationscanariseduetorepeatedcuttingofthesamesurface,thatleadtoinstability.Aflexiblemultibodysystemmodelofthesystemisthebasisforasubsequentanalysisofthestabilityoftheprocess.Stabilityanalysisisdoneusinganapproximationasatime-discretesystemviathesemi-discretizationmethod.Anadaptronicturningchiselcomprisingapiezoactuatorandsensorsisthenusedincombinationwithdifferentcontrolconceptstoimprovethestabilityoftheprocess.Theeffectivenessofthedifferentstrategiesiscomparedbasedontheinfluenceonthestabilitycharts.AclassicH∞controllerbasedonamodelofthecoupledsystemofworkpieceandtoolcanonlyyieldsomeimprovements,whenanadditionalmeasurementoftheworkpiecedisplacementisadded.IncorporatingknowledgeonthecuttingprocesscouplingworkpieceandtoolusingagainscheduledH∞controllerallowsfurtherimprovements.However,robustnesswithrespecttomodeluncertainties,notablyconcerningtheforcelaw,remainsanissue.

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简介：Aclassofboundaryvalueproblemsforathird-orderdifferentialequationwithaturningpointisconsidered.Usingthemethodofmultiplescalesandothers,theuniformlyvalidasymptoticexpansionofsolutionfortheboundaryvalueproblemisconstructed.