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465 个结果
  • 简介:WeobservetheAutler-Townessplittingeffectina△-typequantumthree-levelsystem,usingthelowestthreelevelsofaSQUID-typeAl/AlOx/Altransmonqubitembeddedinathree-dimensionalcoppermicrowavecavity.Acontroltoneatdifferentstrengthsisappliedinresonancewiththetransitionbetweenthefirstandsecondexcitedstates,whilethespectrabetweeneachofthemandthegroundstateareprobedbyanothermicrowavetone.Theexperimentalresuitshowsthedifferencebetweenthetwospectra,andfitswellwiththeLindbladmasterequationmodel.

  • 标签: 三能级系统 量子 分裂型 铝/氧化铝 光谱差异 微波谐振腔
  • 简介:Extremewaterlevelisanimportantconsiderationwhendesigningcoastalprotectionstructures.However,frequencyanalysisrecommendedbystandardcodesonlyconsiderstheannualmaximumwaterlevel,whereaswaterlevelsshouldactuallyberegardedasacombinationofastronomicaltideandstormsurge.Thetwoimpactingfactorsarebothrandomvariables,andthispaperdiscussestheirdependencystructuresandproposesanewjointprobabilitymethodtodetermineextremedesignwaterlevels.Thelognormal,Gumbel,Weibull,Pearsontype3,traditionalmaximumentropy,andmodifiedmaximumentropydistributionsareappliedtofitunivariatedataofastronomicaltidesandstormsurgesseparately,andthebivariatenormal,Gumbel-Hougaard,FrankandClaytoncopulasarethenutilizedtoconstructtheirjointprobabilitydistributions.Toensurethatthenewdesignmethodissuitableforusewithtyphoondata,theannualoccurrencefrequencyoftyphoonprocessesisconsideredandcorrespondingbivariatecompoundprobabilitydistributionsareproposed.BasedonmaximumwaterleveldataobtainedfromHengmenhydrologicalstationinthePearlRiverBasin,China,theseprobabilitymodelsareappliedtoobtaindesignsforextremewaterlevelsusingthelargestsumoftheastronomicaltideandstormsurgeobtainedunderfixedjointreturnperiods.Thesedesignvaluesprovideanimprovedapproachfordeterminingthenecessaryheightofcoastalandoffshorestructures.

  • 标签: EXTREME water level astronomical TIDE STORM
  • 简介:非结晶的Na的结晶化被使用分子的动力学方法模仿,并且原子簇的进化被我们以前建议了的簇类型索引方法(CTIM)跟踪。结晶化过程展出成核的三个不同阶段,这被表明,原子核的随后的生长并且水晶谷物变粗。尺寸和簇的内部结构在决定它是否是一个原子核起关键作用。跟踪分析的簇能比另外的方法更清楚地并且精确地识别不同结晶化阶段。同时,模拟结果能为以前获得的试验性的现象在原子水平提供合理解释。

  • 标签: 分子动力学 跟踪分析 钠原子 模拟 生长 非晶
  • 简介:Inthispaper,thelongtimeseriesdataofthewellwater-leveldataof12wellsintheSichuanandYunnanareaisanalyzedbytheBaytap-Gtidalanalysissoftware,andwellwaterleveltidalresponsecharacteristicparameters(amplituderatioandphasechange)areextracted.Weanalyzedthefeaturesoftheshapeandstagechange,andcharacteristicparametersofthetidalresponseofwellwaterlevelbeforeandaftertheearthquakes,whichcanprovideanewmethodandapproachtoanalyzingtheresponserelationshipsbetweenwellwaterlevelandearthtideandbarometricpressure.TheresultsshowthatLuguhuWelland9otherwellsareaffectedbyearthtides,andtheirwellwaterlevelamplituderatiosandphasesarerelativelystable;theNanxiWellandDayaoWellwaterlevelchangesareaffectedbythebarometricpressurecombinedwithtideforce,andtheirwellwaterlevelamplituderatiosandphasesaremorediscrete.ThewaterlevelamplituderatiosandphasesofJiangyouWell,LuguhuWellandDongchuanWellaresignificanttolargeearthquakes,andtherelationshipbetweenseismicenergydensityandwaterlevelamplituderatiosandphasesofM_2waveofthethreewellsarepresented.

  • 标签: 潮汐分析 井水水位 响应特征 云南地区 四川 时间序列数据
  • 简介:Inthispaper,thetwoleveladditiveSchwarzalgorithmofmixedfiniteelement.dts-cretizationofInharmonicproblemispresented,therateofconvergeneceisobtained.Moreover,thetwolevelmultiplicativeSchwarzalgorithmisconsidered.

  • 标签: SCHWARZ methods MIXED FINITE ELEMENT Inharmonic
  • 简介:CloudresolvingWeatherResearchandForecasting(WRF)modelsimulationsareusedtoinvestigatetropicalcyclone(TC)genesisefficiencyinanenvironmentwithanearbottomvortex(EBV)andanenvironmentwithamid-levelvortex(EMV).Sensitivityexperimentsshowthatthegenesistimingdependsgreatlyoninitialvorticityverticalprofiles.Thelargertheinitialcolumnintegratedabsolutevorticity,thegreaterthegenesisefficiencyis.Giventhesamecolumnintegratedabsolutevorticity,abottomvortexhashighergenesisefficiencythanamid-levelvortex.Acommonfeatureamongtheseexperimentsistheformationofamid-levelvorticitymaximumpriortoTCgenesisirrespectivewheretheinitialvorticitymaximumlocates.BoththeEMVandEBVscenariossharethefollowingdevelopmentcharacteristics:1)atransitionfromnon-organizedcumulus-scale(~5km)convectivecellsintoanorganizedmeso-vortex-scale(~50to100km)systemthroughupscalecascadeprocesses,2)theestablishmentofanearlysaturatedaircolumnpriortoarapiddropofthecentralminimumpressure,and3)amultipleconvective-stratiformphasetransition.Agenesisefficiencyindex(GEI)isformulatedthatincludesthefollowingfactors:initialcolumnintegratedabsolutevorticity,vorticityattopoftheboundarylayerandverticallyintegratedrelativehumidity.ThecalculatedGEIreflectswellthesimulatedgenesisefficiencyandthusmaybeusedtoestimatehowfastatropicaldisturbancedevelopsintoaTC.

  • 标签: tropical cyclone GENESIS mid-level VORTEX near
  • 简介:Inthemodernanaloguedesign,TransistorLevelFaultSimulation(TLFS)playstheim-portantpartsinceeveryfaultinthewholecircuithastobesimulatedatthatlevel.Unfortunately,itisaveryCPUintensivetaskeventhoughitmaintainsthehighaccuracy.Therefore,HighLevelFaultModeling(HLFM)andHighLevelFaultSimulation(HLFS)arerequiredinordertoalleviatetheeffortsofsimulation.Inthispaper,differentHLFMapproachesarereviewedatthedevicelevelduringlasttwodecades.Weclarifytheirdomainsofapplicationandevaluatetheirstrengthsandcurrentlimitations.Wealsoanalyzecausesoffaultsandintroducevarioustestapproaches.

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  • 简介:ThispaperpointsoutthelimitationsofbothparametricandgeometricmodelmethodscommonlyappliedtogenerateoperationalsketchesinCAPP.Theideasofmulti-levelgraphiclibraryareintroducedandanewgenerativemethodbasedonthislibrarywhichcombinesparametricmethodwithgeometricmodelmethodispresented.Theprinciplesandcharacteristicsoftheconstructionofthelibraryaredescribedindetailandthefeaturedatastructurecorrespondingwiththelibraryisalsopresented.

  • 标签: generation of OPERATIONAL SKETCHES FEATURE LIBRARY
  • 简介:在19802013期间基于海水平,空气温度,海表面温度(SST),空气压力和风数据的分析,在华东海(ECS)的沿海的区域的季节的海水平异例的原因被调查。研究结果出现:(1)沿着ECS的沿海的区域的海水平呈现强壮的季节的变化。年度范围是3045厘米,在北方更大比在南方。从北方到南方,海水平的阶段从140变化

  • 标签: 月平均海平面 季节性变化 海温异常 沿海地区 东海 成因分析
  • 简介:地下的水的overexploitation在动态水水平观察井导致地下水层次,优秀的水的变化和枯竭的连续drawdown。由于陆地沉淀,井管子高举并且观察尖系统被损坏。这些环境地质学问题能由地下水水平观察为地震异例的鉴定论述严重困难。hydrogeological理论和方法上的Basied,水平衡的关系与stressstrain条件含水土层说的纸分析和水铺平政体,然后preliminarily为在一个地下水透支区域识别水水平异例很好讨论理论和方法。我们精确地装的结果表演与上述的理论和方法和从存在数据获得的多年变化模式在联合在井区域根据drawdown漏斗的散开特性的意见判定异例的性质。研究的结果对区分在水水平上从水的长期的透支抽的单个集中的水的影响有用,正确地在地下水透支区域认出水水平异例并且增加地震分析和预言的水平。

  • 标签: 地下水 透支 水位观测 异常识别
  • 简介:ImageisatermthatmainlyembodiesinthecompositionofclassicalChinesepoetry(CCP).Effectivetranslationofimagesiscrucialtothegraspoforiginalmeaningsinapoem.Asaestheticbeautyistheprimaryconcerninpoetry,theconveyanceofbeautyinimagehasadirectimpactintranslation.Toanalyzetranslationstrategiesofimagerybeauty,thetheoryof"translationlevels"byXuJunisadoptedasacriterionincomparingvariantEnglishversionsofCCPintheaestheticlevel.ImagesareselectedfromSeven-characterquatrainstypifiedforabundantsourcesofimages,andfeaturesofimagesareputforwardattheaestheticlevel.Throughtheanalysis,imagesarerenderedbyrecreationofthesensuousandemotionalbeauty.

  • 标签: IMAGE TRANSLATION AESTHETIC LEVEL seven-character
  • 简介:Syntheticdryadhesivesinspiredbythenano-andmicro-scalehairsfoundonthefeetofgeckosandsomespidershavebeendevelopedforalmostadecade.Elastomericsinglelevelmicro-scalemushroomshapedfibresarecurrentlyabletofunctionevenbetterthannaturaldryadhesivesonsmoothsurfacesundernormalloading.However,theadhesionofthesesinglelevelsyntheticdryadhesivesonroughsurfacesisstillnotoptimalbecauseofthereducedcontactsurfacearea.Innature,contactareaismaximizedbyhierarchicallystructuringdifferentscalesoffibrescapableofconformingsurfaceroughness.Inthispaper,weadaptthenature’ssolutionaridproposeanoveldual-levelhierarchicaladhesivedesignusingPolydimethylsiloxane(PDMS),whichistestedunderpeelloadingatdifferentorientations.Anegativemacro-scalemoldismanufacturedbyusingalasercuttertodefineholesinaPoly(methylmethacrylate)(PMMA)plate.AftercastingPDMSmacro-scalefibresbyusingtheobtainedPMMAmold,apreviouslypreparedmicro-fibreadhesiveisbondedtothemacro-scalefibresubstrate.Oncethebondingpolymeriscured,themicro-fibreadhesiveiscuttoformmacroscalemushroomcaps.Eachmacro-fibreoftheresultinghierarchicaladhesiveisabletoconformtoloadsappliedindifferentdirections.Thedual-levelstructureenhancesthepeelstrengthonsmoothsurfacescomparedtoasingle-leveldryadhesive,butalsoweakenstheshearstrengthoftheadhesiveforagivenareaincontact.Theadhesiveappearstobeveryperformancesensitivetothespecificsizeofthefibretips,andexperimentsindicatethatdesigninghierarchicalstructuresisnotassimpleasplacingmultiplescalesoffibresontopofoneanother,butcanrequiresignificantdesignoptimizationtoenhancethecontactmechanicsandadhesionstrength.

  • 标签: biomimetics DRY ADHESIVE HIERARCHICAL dual-level ADHESIVE
  • 简介:Multilayerblackphosphorus(BP)nanoplateletsofdifferentthicknesseswerepreparedbytheliquidphaseexfoliationmethodanddepositedontoyttriumaluminumgarnetsubstratestoformsaturableabsorbers(SAs).Thesewerecharacterizedwithrespecttotheirthickness-dependentsaturableabsorptionpropertiesat3μm.TheBP-SAswereemployedinapassivelyQ-switchedEr:Lu2O3laserat2.84μm.ByusingBPexfoliatedindifferentsolvents,stablepulsesasshortas359nsweregeneratedatanaverageoutputpowerofupto755mW.Therepetitionrateintheexperimentwas107kHz,correspondingtoapulseenergyof7.1μJ.TheseresultsprovethatBP-SAshaveagreatpotentialforopticalmodulationinthemid-infraredrange.

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