简介：Amongthepresentthreetypesofelectricfield-inducedluminescencewenoticedsimilaritiesbetweentheinorganicandorganicmaterialsinelectricfieldintensity.InthishighelectricfieldrangeSiO2hasthreefunctions:acceleration,excitationandmultiplicationofelectrons.Basedontheaccelerationeffect,cathodoluminescence-likeemissionoforganicmoleculesandpolymerswasfound.ByusingthethreefunctionsofSiO2orII-VIcompoundsandtheheterojunctionofinorganicandorganicmaterialwerealizeddifferentvariantsofmixedexcitationinelectroluminescence.

简介：Theeffectsoftheconstantexcitationonthelocalbifurcationoftheperiodicsolutionsinthe1:2internalresonantsystemswereanalyzedbasedonthesingularitytheory.Itisshownthattheconstantexcitationmakeinfluenceonlywhenthereexistsomenonlinearterms,intheoscillatorwithlowerfrequency.Besidesactingasmainbifurcationparameter,theconstantexcitation,togetherwithcoefficientsofsomenonlinearterms,maychangethevaluesofunfoldingparametersandthetypeofthebifurcation.Underthenon-degeneratecases,theeffectofthethirdordertermscanbeneglected.

简介：ThispaperstudiesthedynamicresponsesofSDOFsystemunderpulse-dominantexcitations.Thepurposeofthestudyistoprepareforscrutinyofsomenear-fieldpulse-dominantgroundmotionsandtheirpotentialtocausestructuraldamage.Extendingthesinglepulsedynamics,weconsidertheeffectofpulsesequences.ThiskindofexcitationwasparticularlyobviousinsomeofpreviousearthquakessuchasNorthridge(1994)andChi-Chi(1995).Basedontheduration,peakandriseanddecayeraofthemainpulseaswellasitsrelationshipwiththepredecessorandsuccessorpulses,weproposeaclassificationforthepulsesequences.Consequentstudieshavebeencarriedoutforacceleration,velocityanddisplacementresponsespectraofthemainpulsewitheitherapredecessororasuccessorpulse.Theanalysisalsoincludesgeneralresponsebehaviorsindifferentfundamentalperiodsegmentsandspecialaspectsofresponseatcertainpoints(e.g.,thecorrespondingpeakpoints).

简介：ＦｌｕｃｔｕａｔｉｏｎｏｆＥｘｃｉｔａｔｉｏｎＦｕｎｃｔｉｏｎｓｉｎＤｉｓｓｉｐａｔｉｖｅＨｅａｖｙｉｏｎＣｏｌｌｉｓｉｏｎｓ￥ＸｕＨｕｓｈａｎ；ＷａｎｇＱｉ；ＬｕＪｕｎ；ＬｉＳｏｎｇｌｉｎ；ＺｈｕＹｏｎｇｔａｉ；ＹｉｎＸｕ；ＦａｎＥ...

简介：ＦｌｕｃｔｕａｔｉｏｎｏｆＥｘｃｉｔａｔｉｏｎＦｕｎｃｔｉｏｎｓｏｆＤａｍｐｅｄＰｒｏｄｕｃｔｓｏｆＩｄｅｎｔｉｆｉｅｄＩｓｏｔｏｐｅｓ￥ＷａｎｇＱｉ；ＬｕＪｕｎ；ＸｕＨｕｓｈａｎ；ＬｉＳｏｎｇｌｉｎ；ＺｈｕＹｏｎｇｔａｉ；ＹｉｎＸ...

简介：被动控制系统的各种各样的类型被用来在最近的年里压制结构的地震反应。在这些系统之中，调节了液体列Dampers(TLCD)由在容器联合液体团的运动的效果浪费输入地震体力，液体上的恢复力量由于严肃负担并且通过孔由于液体运动抑制。在这研究，象频率内容和土壤那样的地震刺激特征的效果用非线性的时间历史分析在TLCD的地震表演上调节reinvestigated。在这方面在伊朗的过去的地震地面运动记录之中，有不同参数的16个记录被选择。在开发的结构的模型，依附的TLCD作为一个调节的团被模仿更潮湿(TMD)有一样的颤动时期并且作为原来的TLCD抑制比率。数字结果证明地震刺激特征经常在排水量减小能力上有一个实质的角色液晶显示器和他们应该在TLCD的设计因此被考虑。

简介：Usingfinite-timecontrolapproach,thispaperproposesanewdesignmethodfornonlinearrobustexcitationcontrolofawidelyused5th-ordermodelofsynchronousgenerators.Thefinite-timeexcitationcontrollerachievedherecanimprovethesystem'sbehaviorsinsomeaspectssuchasquickconvergenceandrobustnessforuncertainties.Simulationsdemonstratethatthefinite-timeexcitationcontrollerismoreeffectivethansomeotherexcitationcontrollers.

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简介：Thediscoveryofexcitationfunctionfluctuationindissipativehearyioncollisions(DHIC)isasimportantasthediscoveryofDHICitself.ManyquantitativeinterpretationofDHICdataonlyarerestrictedtothedeseriptionoftheenergyaverageddifferentialcrosssections.However,thedescriptionofphysicalsystemsshouldinvolveboththeanalysisofaveragedvaluesandfluctuationsofobservables.Thephenomenonofexcitation

简介：Inthispaperthedynamicsofaweaklynonlinearsystemsubjectedtocombinedparametricandexternalexcitationarediscussed.TheexistenceoftransversalhomoclinicorbitsresultinginchaoticdynamicsandbifurcationareestablishedbyusingtheaveragingmethodandMelnikovmethod.Numericalsimulationsarealsoprovidedtodemonstratethetheoreticalanalysis.

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简介：Accurateestimationofstiffnesslossisachallengingprobleminstructuralhealthmonitoring.Inthisstudyorthogonalwaveletdecompositionisusedforidentifyingthestiffnesslossinasingledegreeoffreedomspring-mass-dampersystem.Theeffectsofexcitationfrequencyonaccuracyofdamagedetectionisinvestigated.Resultsshowthatpseudo-aliaseffectscausedbytheorthogonalwaveletdecomposition(OWD),affectdamagedetectability.Itisdemonstratedthattheproposedapproachissuitablefordamagedetectionwhentheexcitationfrequencyisrelativelylow.Thisstudyshowshowaprioriknowledgeaboutthesignalandabilitytocontrolthesamplingfrequencycanenhancedamagedetectability.

简介：Inthispaper,byapplyingasimplifiedversionofLieb'sspin-reflection-positivitymethod,whichwasrecentlydevelopedbyoneofus[G.S.TianandJ.G.Wang,J.Phys.A:Math.Gen.35(2002)941],weinvestigatesomegeneralpropertiesoftheboeon-fermionHamiltonlan,whichhasbeenwidelyusedasaphenomenologicalmodeltodescribethereal-spacepairingofelectrons.Onamathematicallyrigorousbasis,weprovethatforeithernegativeorpositivecoupingV,whichrepresentsthespontaneousdecayandrecombinationprocessbetweenbosonandfermioninthemodel,thepairingenergyofelectronsisnonzero.Furthermore,wealsoshowthatthespin-excitationgapoftheboson-fermionHamiltonianisalwayslargerthanitschargedgap,aspredictedbythepre-palredelectrontheory.

简介：Ｅｘｃｉｔａｔｉｏｎ　Ｆｕｎｃｔｉｏｎ　ｏｆ　Ｆｉｓｓｉｏｎ　ａｎｄ　Ｔｒａｎｓｆｅｒ　Ｒｅａｃｔｉｏｎ　ｉｎ　Ｂｏｍｂａｒｄｍｅｎｔ　ｏｆ　４０Ａｒ　ｏｎ　１５９Ｔｂ　ＮｕｃｌｅｉＥｘｃｉｔａｔｉｏｎＦｕｎｃｔｉｏｎｏｆＦｉｓｓｉｏｎａｎ...

简介：Underharmonicwaveexcitation,thedynamicresponseofabilinearSDOFsystemcanbeexpressedbytheHilbertspectrum.TheHilbertspectrumcanbeformulatedby(1)theinter-wavecombinationmechanismbetweenthesteadyresponseandthetransientresponsewhenthesystembehaveslinearly,or(2)theintra-wavemodulationmechanismembeddedinoneintrinsicmodefunction(IMF)componentwhenthesystembehavesnonlinearly.ThetemporalvariationoftheinstantaneousfrequencyoftheIMFcomponentisconsistentwiththesystemnonlinearbehaviorofyieldingandunloading.Asathoroughstudyofthisfundamentalstructuraldynamicsproblem,thisarticleinvestigatestheinfluenceoftheamplitudeoftheharmonicwaveexcitationontheHilbertspectrumandtheintrinsicoscillatorymodeofthedynamicresponseofabilinearSDOFsystem.

简介：Ｒｅｌａｔｉｏｎ　ｏｆ　Ｔｅｍｐｅｒａｔｕｒｅ　ａｎｄ　Ｅｘｃｉｔａｔｉｏｎ　Ｅｎｅｒｇｉｅｓ　ｏｆ　Ｈｏｔ　Ｎｕｃｌｅｉ　ｉｎ　Ｒｅａｃｔｉｏｎｓ　ｏｆ　４０Ａｒ＋ｎａｔＡｇ　ａｔ　２５ＭｅＶ／ｕＲｅｌａｔｉｏｎｏｆＴｅｍｐｅｒａｔｕｒｅ...

简介：TheeffectsofethanolsolutionsonlowerpowerArICPdischargewerestudiedbymeasuringplasmatemperatures(gastemperature,excitationtemperature,ionizationtemperatureandelectrontemperature)andelectronnumberdensities.Thetemperaturesandelectronnumberdensitieswerereducedwiththeincreasingofethanolconcentration.TheICPsystemismuchapartfromLTEconditions.Thus,ethanolsolutionswillplaceareducingeffectonspectrallineintensity.

简介：Erbium,Ytterbium-codopedZrO2nanoparticles(ZrO2∶Er3+,Yb3+)werepreparedbythesol-emulsion-geltechnique.Thepurposeofthepresentstudyistheapplicationofupconversionphosphorinthebiologicallabel.Inordertomakeoutthemechanismofupconversionunder980nmexcitationthe488nmpumpwasused.Theinfluenceoftemperatureonthecrystallitephasewasstudied.TheresultsconfirmtheupconvertedmechanisminZrO2∶Er3+,Yb3+nanocrystalsisduetoanenergytransferupconversion(ETU).

简介：Harmonic,subharmonic,superharmonic,simultaneoussub/superharmonic,andcombinationresonancesoftheadditivetypeofself-excitedtwocoupled-secondordersystemstomulti-frequencyexcitationareinvestigated.Thetheoreticalresultsareobtainedbythemultiple-scalesmethod.Thesteadystateamplitudesforeachresonanceareplotted,showingtheinfluenceofthedifferentparameters.Analysisforeachfigureisgiven.Approximatesolutioncorrespondingtoeachtypeofresonanceisdetermined.Stabilityanalysesarecarriedoutforeachcase.