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500 个结果
  • 简介:<正>OtosclerosiswasfirstdiscoveredbyValsalvain1704[1],andthetermwasfirstusedbyAntonvonTroltschin1872todifferentiatefromtympanosclerosis[2].Normallytheoticcystinhumanremainsstationaryafterfulldevelopmentandcontainsnovisibleactivatedosteoblastsor

  • 标签: hearing DIFFERENTIATE CANAL stationary PROSTHESIS visible
  • 简介:IntroductionIn1963,MoorA.M.[1]firstlyreportedthephosphateefect,i.e.,intheUVirradiation(253.7nm)ofaqueoussolutionsof4-amino-2-...

  • 标签: PHOSPHATE EFFECT PHOTOLYSIS of CYTOSINE Photoproduct
  • 简介:Forskarntypedeposits,therearetwokindsofskarns,skarnformedbyfiltrating-diffusingmetasomatismandveinskarnformedbyfilling.Theveinskarn,discussedthispaperandconsideredtobemagmaticgenesis,ischaracterizedby:(1)occurringasveinwithdistinctboundarieswithcountryrocks,yetjustthesameeveninmarbleeasytobereplaced;(2)composedofamineralassemblagesimi-lartothatofgranite,containingpegmatiteaswellascoarseskarnmineralpockets,andsometimestran-sitedwithdikerocks;(3)clearcrystallinefeatureofdeposition;(4)sideronintietexture;(5)showingvesicular,bean-likeandflowstructures;(6)verycommonliquidimmiscibility;(7)verticalzoningofgravitationaldifferentiationcausedbyvolatileconcentrationupwards;(8)associatedandtransitedwithiron-copperorebodiesofmagmaticgenesisandtungsten-bearingquartzveinsofsilicatemagmaticgene-sisrichinvolatile;(9)meltinclusions.Twooriginsofskammagma,originatedbyassimilationofsilicatemagmaatitsemplacem

  • 标签: skam skam MAGMA ORE MAGMA .liquid
  • 简介:ApplyingLagrange–Germain'stheoryofelasticthinplatesandHamiltonianformulation,thedynamicsofcantileverplatesandtheproblemofitsvibrationcontrolarestudied,andageneralsolutionisfinallygiven.BasedonHamiltonianandLagrangiandensityfunction,wecanobtaintheflexuralwaveequationoftheplateandtherelationshipbetweenthetransverseandthelongitudinaleigenvalues.Basedoneigenfunctionexpansion,dispersionequationsofpropagationmodeofcantileverplatesarededuced.Bysatisfyingtheboundaryconditionsofcantileverplates,thenaturalfrequenciesofthecantileverplatestructurecanbegiven.Then,analyticsolutionoftheprobleminplatestructureisobtained.Anhybridwave/modecontrolapproach,whichisbasedonbothindependentmodalspacecontrolandwavecontrolmethods,isdescribedandadoptedtoanalyzetheactivevibrationcontrolofcantileverplates.Thelow-order(controlledbymodalcontrol)andthehigh-order(controlledbywavecontrol)frequencyresponseofplatesarebothimproved.Thecontrolspilloverisavoidedandtherobustnessofthesystemisalsoimproved.Finally,simulationresultsareanalyzedanddiscussed.

  • 标签: 振动控制 悬臂板 HAMILTON 独立模态空间控制 混合 振动主动控制
  • 简介:Theatmosphericintraseasonaloscillation(ISO)anditsinterannualvariabilityaresimulatedbytheatmosphericgeneralcirculationmodel,whichwasdevelopedattheInstituteofAtmosphericPhysics.Twonumericalexperimentswereperformed,correspondingtotheAMIP-IandAMIP-IIsimulations,respectively.Themodelreasonablyreproducesthemajoraspectsoftheintraseasonaloscillation,includingthepropagatingpropertyandtheseasonaldifferencesinthetropics,thewavenumberstructureofISOintheglobe,andtheglobalcoincidenceintheinterannualvariationofISO.Comparisonoftheresultsbetweenthetwoexperimentssuggeststhatimprovementoftheboundaryforcingorconsideringtheair-seainteractionmayhelptoimprovethesimulationontheISOanditsinterannualvariability.

  • 标签: simulation INTRASEASONAL OSCILLATION (ISO) COINCIDENCE
  • 简介:Atheoryofnonfluidizedgas-solidsflow,whichcombinesthetheoryofmultiphaseflowwiththemechanicsofparticulatemedia,wasproposedonthebasisofunderstandingthattheparticlescontacteachother,solidsandgasareinmovement,andthedragforceontheparticlescausedbyinterstitialgasflowissimilartogravityforcehavingthepropertyofmassforce.Thenthistheorywasverifiedbyexperimentsonverticalandinclinedmovingbeds,andwasappliedtocalculationanddesignofequipmentanddeviceswithmovingbeds,suchaspneumaticmovingbedtransport,dipleg,V-value,L-valve,orificeflow,andarchingprevention.Itcanbeusedtoguidethedesignandoperationofmovingbedsandfixedbeds.

  • 标签: 非流化气-固二相流 移动床 多相流 微粒材料
  • 简介:Theequilibriumfittingcode(EFIT)anditsapplicationintheJ-TEXTtokamakareintegratedbytheMatlablanguage.Thefunctionofanalysisandvisualizationtotheresultsisadded.Inaddition,theexperimentdatameasuredbysoftX-ray(SXR)areusedtocalculateplasmaequilibriumasaconstraintcondition.TheimprovedEFITcodeisusedforJ-TEXTdischargeandtheprofilesofplasmaparameterssuchasfluxfunction,safetyfactorq,pressureandcurrentdensityareobtainedfromthereconstructedconfigurations.

  • 标签: 平衡重 TEXT MATLAB语言 整合 托卡马克装置 等离子体参数
  • 简介:Inthispaper,wefirstlyanalyzethe"3,400traveltimetable"usedforalongtimeinXinjiangSeismologicalNetworktoobtainthevelocitystructuremodelsinaccordwiththetablebyfitting.ThenwefitthevelocityofallseismicphasesrecordedinXinjiangregioninJanuary2009~December2013.Simulationanalysisisdoneonthereliabilityandstabilityofthevelocities,andaconceptisproposedforbuildingsubareacrustalvelocitymodelsaccordingtopartitioningofseismicclusterregions.ThecrustalvelocitymodelsuitablefortheYutianareaisfittedwiththedataofallphasesofseismiceventswithinaradiusof1°aroundthe2014YutianM_S7.3earthquakesinceJanuary2009,andthemodelisappliedtotherelocationoftheYutianM_S7.3earthquakeanddeterminationoffocaldepthsoftheearthquakesequence.

  • 标签: 地壳速度模型 新疆地区 地震台网 内区 结构模型 仿真分析
  • 简介:FunctionsoftheStateFamilyPlanningCommission andItsMajorCoordinatingOrganizationsFunctionsoftheStateFamilyPlanningCommissionan...

  • 标签: FAMILY
  • 简介:Objective:Toanalyzetheprinciplemechanismofthearcusplantarisanditsclinicalapplication.Methods:Thestatesofforcessustainedbythearcusplantariswereanalyzedandcalculatedaccordingtothemechanismofthequadraticparabolicarch.Results:Theaponeurosisplantariscorrespondedtothepullrodofthearcusplantaris.Themedialandlaterallongitudinalarchesformedbythepedalboneswerestablewiththerod,butunstablewithouttherod.Inthelattercondition,onloading,theforcesustaingedbytheparabolicarchbecameaforcesustainedbyasimplebeam,andthearcusplantaristendedtodisappear5andtobeflattened.clinically,240feetwithtalipesequinusweretreatedwithtriplearthrodesis.In34outofthereexamined156feet,theaponeurosisplantariswascutinadditiontothetriplearthrodesisandwasimmobilizedwithcastfor3months.Oneortwoyearslater,theirarcusplantarisdisappeared,paindevelopedwhenwalking,andsomeofthemwalkedwiththemidtarsaljointagainsttheground.Then,thetriplearthrodesisandshorteningoftheaponeurosisplantariswereappliedon18cases,andosteotomyofthecalcaneusandreconstructionoftheaponeurosisplantarisweremadeon10casesandsatisfactoryeffectswereobtained.Conclusions:Inordertoachievesatisfactorytherapeuticeffectsofthetriplearthrodesis,weshouldreestablishthearcusplantarisandaccuratelytreattheaponeurosisplantarisforthebalanceofthesurroundingmuscleforce.

  • 标签: 足畸形 关节固定术 生物力学
  • 简介:Testwashbackhasattractedagooddealofattentionfromresearchersfrommanycountriesintheworldandconsiderableresultshavebeenfound.Bystudyingformerresearches,thispaperreviewsthedefinitionofwashback,relevantconcept,theories,andthemechanismofwashbacksystematically.Itishopedthatthispapercanenrichanddeepenthedevelopmentoflanguagetestingtheories.

  • 标签: ENGLISH testing washback THEORY MECHANISM
  • 简介:ThispaperdevelopsaclaseofquadratureformulawithfirstderivativesItisdemonstratedthatitsdegreeofaccuracyisnotlessthan2k+1forasetofdistinctnodes{x0,x1,...,xn}overinterval[a,b],andjustonly2k+1forequallyspacednodes.FarovercomingtheshortcomingofinvolvingagreatnumberofmanualcomputationsfortheintegrationrulesoftheHermitianinterpolationformula,somesimpleformulasforcomputingautomaticallyβi,γiandE[f]bycomputeraregiven,especiallyforequallyspacednodes.

  • 标签: QUADRATURE FORMULA DEGREE of accuracy.
  • 简介:在这篇文章,用WDVV方程,作者首先证明表面的发作的所有Gromov-Witteninvariants能被一些递归的关系从自己的Gromov-Witteninvariants计算。而且,它可以在发作上决定量产品。它也证明有为发作的大量cohomology的functoriality的某度。给词调音:量cohomology;WDVV方程;Gromov-Witten不变

  • 标签: 量子上同调 WDVV方程 Gromov-Witten不变量 递归关系
  • 简介:IntroductionFormanyyears,listeningcomprehensionhasbeentakenforgrantedasacourseandhassimplybeencontinuousandconstantlisteninggiventothestudentsregardlessofthestrategiesemployed,thestagesneededtoachievethegoalandtheappropriatenessofthematerials.Teachersteachtheirstudentslisteninginthewaytheythemselvesweretaught.Thisempiricalperspectiveofteaching,whichlacksasufficientlyscientificbasis,hasbeenchallengedinrecentyearsbyevidencefrompsycholinguisticresearch.Thisinfluentialfieldofstudyhasprovidedmanyfreshinsightsintothenatureofthehumanmindandbroadenedourviewoflanguageteaching.

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  • 简介:AftertheendoftheColdWar,therehaveemergedaseriesofnewsignificantphenomenaininternationalrelations.First,asaresultofthecollapseoftheformerSovietUnionandthedisintegrationoftheWarsawTreatyOrganization,thereisnolongeracommonenemyforWesternEuropeandtheUS.Second,con-

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  • 简介:ThispaperbrieflyintroducestheSeismotectonicMapofXinjianganditsneighborhoodinthescaleof1∶2500000.Themapisamended,supplementedandexpandedbasedofthenewlycompiledSeismotectonicMapofXinjianginscale1∶1000000.ThebasemapofthisseismotectonicmapisthegeologicmapofwesternChinaanditsneighborhoodcompiledbyLiTingdong.Theabundantnewmaterialsfromrelatedresearch,referentialliteraturesandtheanalysesonremotesensingdatawereusedinthecompilingwork.Adatabaseandrelevantdocumentsarebuiltfornearly300activefaultsand150activefolds.Thebasicinformationofthemajoractivefaults,especiallythoseneartheborderareasinthismapareintroducedinthispaper.

  • 标签: 构造图 地震 新疆 邻域 中国西部 编制工作