简介:U.S.sanctionsonIranhaveexpandedsincethestartoftheIraniannuclearissue.Theyhavegrownfromsmall-scaleembargoestotoday’ssanctionsonmultiplesectorsincludingfinance,trade,energy,andpersonnel.DuringU.S.PresidentBarackObama’stenure,thereisverylittlelikelihoodthattheU.S.willresorttoforce,leavingWashingtonwithnoothermeansthansanctionstopersuadeIrantochangeitsnuclearpolicy.Thismeansthatalthoughsanctionshavealimitedeffect,theU.S.willcontinuetoprimarilyrelyonthemtoforceIran’shand.
简介:Asinterpretationisanintentionalandinterpersonalinteraction,anidealresultcan’tbeeasilyachievedbetweenthesenderandthereceiverduetothechallengesposedbylanguagesandculturalbarriers.FromtheperspectiveofintentionandfunctioninSkopostheorie,typicalexamplesareanalyzedtoillustratehowtoachieveaneffectiveinterpretationbyconsideringthesender’sintentionandthereceiver’sacceptance.
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.
简介:Acoupled-modesoundpropagationmodelwithcomplexeffectivedepthispresented,inordertoinvolvetheeffectofbranchlineintegralforacousticfieldinarange-dependentwaveguide.Theequationsofmotionandcontinuityareusedtoobtainthecoupledequations,whichsatisfyboundaryconditionsinthewaveguidewithvaryingtopographyandcontainonecouplingmatrix.Meanwhile,thecouplingsbetweendiscreteandcontinuousspectrumaredealtwithbasedoncomplexeffectivedepththeory.Numericalsimulationsshowthattheaccuracyoftransmissionlossisimprovedbythecoupledmodemodelwheneigenvaluesoftrappedmodesarelocatednearthebranchpoint.Theacousticfieldinanon-horizontallystratifiedwaveguidecanbecalculatedefficientlyandaccuratelybythismodel,andtheenergycorrespondingtotrappedmodes,leakymodesandbranchlineintegralcanbeconsideredadequately.
简介:Thermaltransportinahighlyporousmetallicwire-wovenbulkKagome(WBK)isnumericallyandanalyticallymodeled.Basedontopologysimilarityanduponintroducinganelongationparameterinthermaltortuosity,anidealizedKagomewithnon-twistedstrutsisemployed.SpecialfocusisplaceduponquantifyingtheeffectoftopologicalanisotropyofWBKuponitseffectiveconductivityItisdemonstratedthattheeffectiveconductivityreduceslinearlyastheporosityincreases,andtheextentofthereductionissignificantlydependentontheorientationofWBK.ThegoverningphysicalmechanismofanisotropicthermatransportinWBKisfoundtobetheanisotropicthermaltortuositycausedbytheintrinsicanisotropictopologyofWBK.
简介:Weintroduceanalmost-automatictechniqueforgenerating3Dcarstylingsurfacemodelsbasedonasingleside-viewimage.Ourapproachcombinesthepriorknowledgeofcarstylinganddeformablecurvenetworkmodeltoobtainanautomaticmodelingprocess.Firstly,wedefinetheconsistentparameterizedcurvetemplatefor2Dand3Dcaserespectivelybyanalyzingthecharacteristiclinesforcarstyling.Then,asemi-automaticextractionfromaside-viewcarimageisadopted.Thirdly,statisticmorphablemodelof3Dcurvenetworkisusedtogettheinitialsolutionwithsparsepointconstraints.Withonlyafewpost-processingoperations,theoptimizedcurvenetworkmodelsforcreatingsurfacesareobtained.Finally,thestylingsurfacesareautomaticallygeneratedusingtemplate-basedparametricsurfacemodelingmethod.Morethan503Dcurvenetworkmodelsareconstructedasthemorphabledatabase.Weshowthatthisintelligentmodelingtoolsimplifiestheexhaustedmodelingtask,andalsodemonstratemeaningfulresultsofourapproach.
简介:Antibodies,alsoknownasimmunoglobulins,areincrediblyspecificandverygoodatstickingtomolecules.Theyareabletodiscriminatebetweenmoleculesthatvarybyaslittleasasingleatomandflagforeignorharmfulonesforattackorremovalbytheimmunesystem.Essentially,theyserveasthebackboneofthehumoralimmunesystem.This'exquisitespecificity'isimportanttopreventtheimmunesystemfrommistakinghealthy,humanproteinsandmoleculesfrominvadingones.However,