学科分类
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16 个结果
  • 简介:U.S.sanctionsonIranhaveexpandedsincethestartoftheIraniannuclearissue.Theyhavegrownfromsmall-scaleembargoestotoday’ssanctionsonmultiplesectorsincludingfinance,trade,energy,andpersonnel.DuringU.S.PresidentBarackObama’stenure,thereisverylittlelikelihoodthattheU.S.willresorttoforce,leavingWashingtonwithnoothermeansthansanctionstopersuadeIrantochangeitsnuclearpolicy.Thismeansthatalthoughsanctionshavealimitedeffect,theU.S.willcontinuetoprimarilyrelyonthemtoforceIran’shand.

  • 标签: 伊朗 美国 扩散运动 中东地区 以色列 威胁
  • 简介:Asinterpretationisanintentionalandinterpersonalinteraction,anidealresultcan’tbeeasilyachievedbetweenthesenderandthereceiverduetothechallengesposedbylanguagesandculturalbarriers.FromtheperspectiveofintentionandfunctioninSkopostheorie,typicalexamplesareanalyzedtoillustratehowtoachieveaneffectiveinterpretationbyconsideringthesender’sintentionandthereceiver’sacceptance.

  • 标签: EFFECTIVE INTERPRETATION INTENTION FUNCTION Skopos
  • 简介:Accordingtothenaiveconstituentquarkmodel,the?mesonisbelievedtobeanalmostpuressstate,whilethereareonlyupanddownquarks(antiquarks)inthenucleon(antinucleon).Thusthepp!??reaction,withitsdisconnectedquarklines,shouldbesuppressedaccordingtotheOkubo-Zeig-Iizuka(OZI)rule.However,eventheOZIruleisstrictlyenforcedbynature,theppreactioncanstillproceedthroughthenon-strangequarkcomponentofthe?meson,becauseoftheslightdiscrepancyfromtheidealmixingofthevectormesonsingletandoctet[1].Withthissmalldiscrepancy,onecandetermineanupperlimitforthetotalcrosssectionofpp!??reactionbycomparisontothetotalcrosssectionoftherelatedpp!ωωreaction.Thisyieldsacrosssectionforpp!??attheorderof10nb.However,theexperimentalresultshowedthatthecrosssectionat1.2GeVincidentanti-protonmomentum,=2.860.46μb,istwoordersofmagnitudelargerthantheestimatedvalue.Hence,thepp!??reactionhasattractedmuchattentionbecauseofthelargeviolationoftheOZIrule.

  • 标签: LAGRANGIAN PP EXPERIMENTAL QUARK total IDEAL
  • 简介:Acoupled-modesoundpropagationmodelwithcomplexeffectivedepthispresented,inordertoinvolvetheeffectofbranchlineintegralforacousticfieldinarange-dependentwaveguide.Theequationsofmotionandcontinuityareusedtoobtainthecoupledequations,whichsatisfyboundaryconditionsinthewaveguidewithvaryingtopographyandcontainonecouplingmatrix.Meanwhile,thecouplingsbetweendiscreteandcontinuousspectrumaredealtwithbasedoncomplexeffectivedepththeory.Numericalsimulationsshowthattheaccuracyoftransmissionlossisimprovedbythecoupledmodemodelwheneigenvaluesoftrappedmodesarelocatednearthebranchpoint.Theacousticfieldinanon-horizontallystratifiedwaveguidecanbecalculatedefficientlyandaccuratelybythismodel,andtheenergycorrespondingtotrappedmodes,leakymodesandbranchlineintegralcanbeconsideredadequately.

  • 标签: 传播模型 有效深度 配对模式 声音 连续性方程 耦合方程
  • 简介:Thermaltransportinahighlyporousmetallicwire-wovenbulkKagome(WBK)isnumericallyandanalyticallymodeled.Basedontopologysimilarityanduponintroducinganelongationparameterinthermaltortuosity,anidealizedKagomewithnon-twistedstrutsisemployed.SpecialfocusisplaceduponquantifyingtheeffectoftopologicalanisotropyofWBKuponitseffectiveconductivityItisdemonstratedthattheeffectiveconductivityreduceslinearlyastheporosityincreases,andtheextentofthereductionissignificantlydependentontheorientationofWBK.ThegoverningphysicalmechanismofanisotropicthermatransportinWBKisfoundtobetheanisotropicthermaltortuositycausedbytheintrinsicanisotropictopologyofWBK.

  • 标签: 有效导热系数 夹芯板 各向异性 织造 拓扑结构 数值模拟
  • 简介:Weintroduceanalmost-automatictechniqueforgenerating3Dcarstylingsurfacemodelsbasedonasingleside-viewimage.Ourapproachcombinesthepriorknowledgeofcarstylinganddeformablecurvenetworkmodeltoobtainanautomaticmodelingprocess.Firstly,wedefinetheconsistentparameterizedcurvetemplatefor2Dand3Dcaserespectivelybyanalyzingthecharacteristiclinesforcarstyling.Then,asemi-automaticextractionfromaside-viewcarimageisadopted.Thirdly,statisticmorphablemodelof3Dcurvenetworkisusedtogettheinitialsolutionwithsparsepointconstraints.Withonlyafewpost-processingoperations,theoptimizedcurvenetworkmodelsforcreatingsurfacesareobtained.Finally,thestylingsurfacesareautomaticallygeneratedusingtemplate-basedparametricsurfacemodelingmethod.Morethan503Dcurvenetworkmodelsareconstructedasthemorphabledatabase.Weshowthatthisintelligentmodelingtoolsimplifiestheexhaustedmodelingtask,andalsodemonstratemeaningfulresultsofourapproach.

  • 标签: 汽车造型 建模方法 表面模型 图像生成 侧面 参数曲线
  • 简介:Antibodies,alsoknownasimmunoglobulins,areincrediblyspecificandverygoodatstickingtomolecules.Theyareabletodiscriminatebetweenmoleculesthatvarybyaslittleasasingleatomandflagforeignorharmfulonesforattackorremovalbytheimmunesystem.Essentially,theyserveasthebackboneofthehumoralimmunesystem.This'exquisitespecificity'isimportanttopreventtheimmunesystemfrommistakinghealthy,humanproteinsandmoleculesfrominvadingones.However,

  • 标签: 艾滋病毒 抗体 疫苗 粘附分子 免疫系统 免疫球蛋白
  • 简介:<正>Nowtheminingofhighsaltundergroundbrinehasbeenanimportantaspectofsaltlakemining,whichisthenecessarysupporttothedevelopmentofnationaleconomy.Withthechangeofundergroundgeological

  • 标签: HIGH SALT BRINE poly epoxy succinic