简介:WeobservetheAutler-Townessplittingeffectina△-typequantumthree-levelsystem,usingthelowestthreelevelsofaSQUID-typeAl/AlOx/Altransmonqubitembeddedinathree-dimensionalcoppermicrowavecavity.Acontroltoneatdifferentstrengthsisappliedinresonancewiththetransitionbetweenthefirstandsecondexcitedstates,whilethespectrabetweeneachofthemandthegroundstateareprobedbyanothermicrowavetone.Theexperimentalresuitshowsthedifferencebetweenthetwospectra,andfitswellwiththeLindbladmasterequationmodel.
简介:Extremewaterlevelisanimportantconsiderationwhendesigningcoastalprotectionstructures.However,frequencyanalysisrecommendedbystandardcodesonlyconsiderstheannualmaximumwaterlevel,whereaswaterlevelsshouldactuallyberegardedasacombinationofastronomicaltideandstormsurge.Thetwoimpactingfactorsarebothrandomvariables,andthispaperdiscussestheirdependencystructuresandproposesanewjointprobabilitymethodtodetermineextremedesignwaterlevels.Thelognormal,Gumbel,Weibull,Pearsontype3,traditionalmaximumentropy,andmodifiedmaximumentropydistributionsareappliedtofitunivariatedataofastronomicaltidesandstormsurgesseparately,andthebivariatenormal,Gumbel-Hougaard,FrankandClaytoncopulasarethenutilizedtoconstructtheirjointprobabilitydistributions.Toensurethatthenewdesignmethodissuitableforusewithtyphoondata,theannualoccurrencefrequencyoftyphoonprocessesisconsideredandcorrespondingbivariatecompoundprobabilitydistributionsareproposed.BasedonmaximumwaterleveldataobtainedfromHengmenhydrologicalstationinthePearlRiverBasin,China,theseprobabilitymodelsareappliedtoobtaindesignsforextremewaterlevelsusingthelargestsumoftheastronomicaltideandstormsurgeobtainedunderfixedjointreturnperiods.Thesedesignvaluesprovideanimprovedapproachfordeterminingthenecessaryheightofcoastalandoffshorestructures.
简介:Inthispaper,thelongtimeseriesdataofthewellwater-leveldataof12wellsintheSichuanandYunnanareaisanalyzedbytheBaytap-Gtidalanalysissoftware,andwellwaterleveltidalresponsecharacteristicparameters(amplituderatioandphasechange)areextracted.Weanalyzedthefeaturesoftheshapeandstagechange,andcharacteristicparametersofthetidalresponseofwellwaterlevelbeforeandaftertheearthquakes,whichcanprovideanewmethodandapproachtoanalyzingtheresponserelationshipsbetweenwellwaterlevelandearthtideandbarometricpressure.TheresultsshowthatLuguhuWelland9otherwellsareaffectedbyearthtides,andtheirwellwaterlevelamplituderatiosandphasesarerelativelystable;theNanxiWellandDayaoWellwaterlevelchangesareaffectedbythebarometricpressurecombinedwithtideforce,andtheirwellwaterlevelamplituderatiosandphasesaremorediscrete.ThewaterlevelamplituderatiosandphasesofJiangyouWell,LuguhuWellandDongchuanWellaresignificanttolargeearthquakes,andtherelationshipbetweenseismicenergydensityandwaterlevelamplituderatiosandphasesofM_2waveofthethreewellsarepresented.
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.
简介:Inthemodernanaloguedesign,TransistorLevelFaultSimulation(TLFS)playstheim-portantpartsinceeveryfaultinthewholecircuithastobesimulatedatthatlevel.Unfortunately,itisaveryCPUintensivetaskeventhoughitmaintainsthehighaccuracy.Therefore,HighLevelFaultModeling(HLFM)andHighLevelFaultSimulation(HLFS)arerequiredinordertoalleviatetheeffortsofsimulation.Inthispaper,differentHLFMapproachesarereviewedatthedevicelevelduringlasttwodecades.Weclarifytheirdomainsofapplicationandevaluatetheirstrengthsandcurrentlimitations.Wealsoanalyzecausesoffaultsandintroducevarioustestapproaches.
简介:ThispaperpointsoutthelimitationsofbothparametricandgeometricmodelmethodscommonlyappliedtogenerateoperationalsketchesinCAPP.Theideasofmulti-levelgraphiclibraryareintroducedandanewgenerativemethodbasedonthislibrarywhichcombinesparametricmethodwithgeometricmodelmethodispresented.Theprinciplesandcharacteristicsoftheconstructionofthelibraryaredescribedindetailandthefeaturedatastructurecorrespondingwiththelibraryisalsopresented.
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。
简介:ImageisatermthatmainlyembodiesinthecompositionofclassicalChinesepoetry(CCP).Effectivetranslationofimagesiscrucialtothegraspoforiginalmeaningsinapoem.Asaestheticbeautyistheprimaryconcerninpoetry,theconveyanceofbeautyinimagehasadirectimpactintranslation.Toanalyzetranslationstrategiesofimagerybeauty,thetheoryof"translationlevels"byXuJunisadoptedasacriterionincomparingvariantEnglishversionsofCCPintheaestheticlevel.ImagesareselectedfromSeven-characterquatrainstypifiedforabundantsourcesofimages,andfeaturesofimagesareputforwardattheaestheticlevel.Throughtheanalysis,imagesarerenderedbyrecreationofthesensuousandemotionalbeauty.
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.
简介:Multilayerblackphosphorus(BP)nanoplateletsofdifferentthicknesseswerepreparedbytheliquidphaseexfoliationmethodanddepositedontoyttriumaluminumgarnetsubstratestoformsaturableabsorbers(SAs).Thesewerecharacterizedwithrespecttotheirthickness-dependentsaturableabsorptionpropertiesat3μm.TheBP-SAswereemployedinapassivelyQ-switchedEr:Lu2O3laserat2.84μm.ByusingBPexfoliatedindifferentsolvents,stablepulsesasshortas359nsweregeneratedatanaverageoutputpowerofupto755mW.Therepetitionrateintheexperimentwas107kHz,correspondingtoapulseenergyof7.1μJ.TheseresultsprovethatBP-SAshaveagreatpotentialforopticalmodulationinthemid-infraredrange.