简介:TheproceedingsofthestudiesonmetalogenicandrelatedsubjectsoftheChinesecontinentareprefacedforthecomingconventiononsimilarbutla...
简介:ThesecondInternationalConferenceonInverseProblems-RecentTheoreticalDevelopmentandNumericalApproacheswasheldatFudanUniversityinShanghaifromJune16-21,2004.ThefirstonewasheldattheCity,UniversityofHongKonginJanuaryof2002anditwasagreedtoholdtheconferenceoncepertwoyearsinthePan-PacificAsiancountries.ThenextconferenceisscheduledtoholdatHokkaidoUniversity,Sapporo,
简介:ThisisthespecialissuedevotedtobioinformaticsresearchinSingapore.BioinformaticsresearchinSingaporestartedlargelyin1996whentheBioinformaticsCenter,NationalUniversityofSingapore,wasformed.Withthegovernment'seffortstoturnSingaporeintoapowerhouseofbiomedicalresearch,theGenomeInstituteofSingaporeandtheBioinformaticsInstituteofSingaporehavebeenestablishedsince2000.Recently,abioinformaticsresearchcenterwasalsoformedintheNanyangTechnologicalUniversity.Currently,therearealargenumberofbioinformaticsresearchteamsineachoftheseinstitutions.
简介:InJune2008theOlympictorch,representingsport-ingethosoftheworld,willembarkonitsprimaryjourneytoMt.Qomolangma.Theworldwillonceagainfocuson"theroofoftheworld"-Tibet.OnJuly13~(th),2001,theBeijingOrganizingCommitteeforthe29~(th)OlympicGamesmadeitsfinalstatementwiththepromisethat"ifBeijingwasacceptedasthehostofthe2008Olympiad,Beijingwillorganizetherouteofthe
简介:TheNairobiForward-LookingStrategies¥//OneoftheNairobiStrategies,Paragraph156fromtheNairobistrategiesisespeciallyrelevanttothe...
简介:Sino-Cambodiafriendshiphasgonethroughthetestofchangesininternationalsituationandremainedunfading.2018marksthe60thanniversaryoftheestablishmentofdiplomaticrelationshipbetweenChinaandCambodia.WhenCambodianPrimeMinisterSamdechHunSenvisitedChinainMay2017,ChinesePresidentXiJinpingcalledonthetwocountriestotaketheopportunityofthe60thanniversaryoftheestablishmentofdiplomaticrelationship,strengthenexchangesintermsofgovernance,tourism,culture,educationandyouth.
简介:Aerodynamicforcesandpowerrequirementsinforwardflightinabumblebee(Bombusterrestris)werestudiedusingthemethodofcomputationalfluiddynamics.Actualwingkinematicdataoffreeflightwereusedinthestudy(thespeedrangesfrom0m/sto4.5m/s;advanceratiorangesfrom0-0.66).Thebumblebeeemploysthedelayedstallmechanismandthefastpitching-uprotationmechanismtoproduceverticalforceandthrust.Theleading-edgevortexdoesnotshedinthetranslatoryphaseofthehalf-strokesandismuchmoreconcentratedthanthatofthefruitflyinapreviousstudy.Athoveringandlow-speedflight,theverticalforceisproducedbyboththehalf-strokesandiscontributedbywinglift;atmediumandhighspeeds,theverticalforceismainlyproducedduringthedownstrokeandiscontributedbybothwingliftandwingdrag.Atallspeedsthethrustismainlyproducedintheupstrokeandiscontributedbywingdrag.Thepowerrequirementatlowtomediumspeedsisnotverydifferentfromthatofhoveringandisrelativelylargeatthehighestspeed(advanceratio0.66),i.e.thepowercurveisJshaped.Exceptatthehighestflightspeed,storingenergyelasticallycansavepowerupto20%-30%.Atthehighestspeed,becauseofthelargeincreaseofaerodynamictorqueandtheslightdecreaseofinertialtorque(duetothesmallerstrokeamplitudeandstrokefrequencyused),thepowerrequirementisdominatedbyaerodynamicpowerandtheeffectofelasticstorageofenergyonpowerrequirementislimited.
简介:Vascularendothelialgrowthfactor(VEGF)isprimarilyknownasaproangiogenicfactorandisoneofthemostimportantgrowthandsurvivalfactorsaffectingthevascularendothelium.However,recentstudieshaveshownthatVEGFalsoplaysavitalroleintheimmuneenvironment.InadditiontothetraditionalgrowthfactorroleofVEGFandVEGFreceptors(VEGFRs),theyhaveacomplicatedrelationshipwithvariousimmunecells.VEGFalsoreportedlyinhibitsthedifferentiationandfunctionofimmunecellsduringhematopoiesis.Dendriticcells(DCs),macrophages,andlymphocytesfurtherexpresscertaintypesofVEGFreceptors.VEGFcanbesecretedaswellbytumorcellsthroughtheautocrinepathwayandcanstimulatethefunctionofcancerstemness.ThisreviewwillprovideaparadigmshiftinourunderstandingoftheroleofVEGF/VEGFRsignalingintheimmuneandcancerenvironment.
简介:在最近的过去,试验性的研究证明了片的一些优点在轴的压缩机倾斜并且扫。当大多数试验性的结果与另外的特征被相结合,在压缩机的性能上决定单个参数的效果是困难的。现在的数字研究针对在出口理解表演和三维的流动模式扫并且未扫过的转子。三个转子也就是;未扫过,200向前扫了,200个向后打扫的转子与理解片边界层流动的模式的一个特定的意愿被分析。分析被做用一充分三维粘滞CFD代码CFX-5。结果在压力上升显示了减小与扫。向后扫根据endwalls附近的表演被考虑,是有害的。在在中间的跨度区域的wake的在另一方面全部的压力损失是更少与向后扫,它这里赞成它的应用程序。然而,向后不利地扫影响货摊边缘。能力向前扫偏斜向中心的streamlines变得以低流动率减少了。向前打扫变化吸表面优化的以如此的一个方法的streamline模式向中心被偏斜,压力表面优化向casing被偏斜。相反的行为在向后打扫的转子被观察。
简介:InthefieldofComptonscatterimaging,theproblemofhowtogetameaningfulimagefromlarge-scaleobjectisstillnotfullysttled.Thedifficultymainlyliesinthemethodofthecompensationoftheattenuation,Basedontheprincipleofsmall-angleforwardscattering,anewattenuationcorrectionmethodisdeducedinthispaper,wecandistinguishairfromothermaterialsevenitisdeepinsidealarge-scaleobject.Toverifyourmethod,wedesignamodelofaone-meter-longobjectandperformMonteCarlosimulationswithMCNPsoftware.