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

简介：全球大气的尖动量(AAM)的变化激动的极的运动被调查。基于全球AAM数据，数字结果证明AAM的变化能激动季节摇摆(例如，18月摇摆)并且蜡烛制造者摇摆，它与以前的研究同意很好。另外由过滤主导的低频率部件，一些不同极摇摆相应于大气的潮被发现的日报、半天的某伟人。

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...

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简介：一个新方法被建议由同时检测本地损坏并且从几结构的动态回答识别支持刺激在未知支持刺激下面估计结构的条件。对结构起作用的支持刺激被直角的多项式近似建模，并且关于它的物理参数和直角的系数的结构的动态反应的敏感被导出。鉴定方程基于泰勒是第一顺序近似，并且在一个反复的过程与抑制最少平方的方法被解决。一十五故事砍造模型和五故事的三维的钢框架结构被学习验证建议方法。有吵闹的测量加速的数字模拟证明建议方法罐头精确地检测本地损坏并且从仅仅结构的几回答识别未知支持刺激。这个方法为检测结构的损坏并且与未知输入和不完全的测量产量信息更新模型提供一条新途径。

简介：现在的学习试图扩大旋转对称的地球的传统的旋转理论到triaxial地球。我们再用形式表示为triaxial的Liouville方程和他们的一般解决方案非刚性的土并且发现传统的理论在为刺激函数建模介绍一些理论错误。而且，我们把那个理论用于大气的刺激并且发现理论错误不应该被忽视给现在的测量精确性。因此，我们断定旋转对称的地球的旋转的传统的理论应该被修订并且升级了包括地球triaxiality的效果。

简介：一个计划被开发计算在电子影响刺激以后射出的放射的极化。充分相对论的弄歪波浪的方法是使用的品种内异系交配体节计算。计划被用于象他一样和象Li一样离子。线极化的计算价值与另外的理论结果和试验性的价值相比。象ForHe一样U在更低的事件精力，，现在的极化在更高的精力在1%以内同意另外的理论的，差别增加直到大约10%。为象他一样Fe和Ti，为大多数线的极化度的现在的结果在试验性的错误酒吧以内同意试验性的数据。为象Li一样Ti线q(1s2s2p(2)P(3/2)到1s(2)2s)，极化的现在的值与另一理论一个，和两个最优地同意值与在试验性的错误工具条以内的测量数据一致。

简介：Wediscussthedynamicsofultrashortpulsedlaserexcitationinbulkopticalsilica-basedglasses(fusedsilicaandborosilicateBK7)well-abovethepermanentmodificationthreshold.Weindicatesubsequentstructuralandthermomechanicalenergyrelaxationpathsthattranslateintopositiveandnegativerefractiveindexchanges,compressionandrarefactionzones.Iffastelectronicdecayoccursatlowexcitationlevelsinfusedsilicaviaself-trappingofexcitons,forcarrierdensitiesinthevicinityofthecriticalvalueattheincidentwavelength,persistentlong-livingabsorptivestatesindicatetheachievementoflowviscositymatterstatesmanifestingpressurerelaxation,rarefaction,voidopeningandcompactionintheneighboringdomains.Anintermediateps-longexcitedcarrierdynamicsisobservedforBK7intherangecorrespondingtostructuralexpansionandrarefaction.Theamountofexcitationandthestrengthofthesubsequenthydrodynamicevolutioniscriticallydependentonthepulsetimeenvelope,indicativeofpotentialoptimizationschemes.

简介：一种分析技术，也就是homotopy分析方法(火腿)，被用来与参量的刺激解决非线性的摆动的问题。不同于不安方法，火腿根本，并且这样不依赖于任何小物理参数为弱并且强烈非线性的问题有效。另外，火腿与在提供一个简单方法借助于一个辅助参数调整并且控制系列解决方案的集中区域的所有另外的分析技术不同。在现在的纸，一为有参量的刺激的非线性的摆动的周期的分析近似被使用火腿获得，并且结果被数字模拟验证。

简介：Themeasurementofundergroundmediumvariationusingarepeatedartificialsourcehasgraduallybecomeanimportantgoaltopursue.Inrecentyears,wehavedevelopedandimprovedatechnologysystemwithlargecapacityairgunsexcitedinlandreservoirsbytransplantingmarineseismicexplorationtechnology.Theexcitationeffecthasacloserelationshiptoairguncapacity,waterenvironment,andexcitationconditions.Inviewthatlargecapacityairgunmustbeexcitedwithoutawaterenvironment,weexpandthesystemtouseindownhole.BasedontheBHS-2200LLdownholeairgunwithacapacityof250in3,thispapercarriesoutacomparativeanalysisonthecharacteristicsofanairgunsourceexcitedin0.2m-and5.0m-diameterwells,andtheresultsshowthat:(1)Thedominantfrequencyoftheairgunsignalexcitedina5.0mwellismainlyfrom10Hzto40Hz,lowerthanthatina0.2mwell,andthelargerbodyofwaterisgoodforbubbleoscillation.(2)Intermsofexcitingenergy,thesignalexcitedina5.0mwellhasstrongerenergythanina0.2mwell,withadifferenceof1orderinmagnitude,andthesignalcanbedetectedupto9kmexcitedina5.0mwellwithasingleshot.(3)Theairgunsignalhasgoodrepeatabilityinbothexcitationwells.Thedownholeairgunexcitationtechnologysystemhaspotentialapplicationindynamicmonitoringnearafaultzonewithasmallscalerange,explorationofoilandmineralresources,andmodernurbangeophysicalenvironment.

简介：Inthispaper,anunderwaterstructureismodeledasacylindricalshellwithinternalbulkheads,andclosedbyatruncatedconicalshell,anditconsistsofmetalsubstrateandsoundabsorbingcoating,whoseFGMcoreisconsidered.Supposetheinnercavityandouterspaceofthestructurearefilledwithairandfluidmediums,themechanicalresponseoftheunderwaterstructureiscalculatedwithGalerkinmethodwhiletheacousticresponseisinvestigatedbymeansoftheHelmholtzintegral.Somenumericalexamplesaregivenandtheeffectofgeometricalsizeandmaterialparametersonmechanicalandacousticresponseisdiscussed.

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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.

简介：Radiointerference(RI),asanaftereffectofcoronadischarge,isanimportantresearchtopicinthefieldofelectromagneticcompatibility,whereexcitationfunctionisappliedbroadlytothepredictionofRIlevel.ThispaperpresentsthetheoryofexcitationfunctionmethodusedintheRIlevelprediction.Then,somepracticalproblemsrelatedtothismethodarediscussed.Thepropagationprocedureofcoronacurrentissolvedbythephase-modaltransformation,andtheimpedancematrixofmultitransmissionlinesiscalculatedbyadoublelogarithmicapproximatemodelofCarson'sGround-Returnimpedance.Atthesametime,inordertocalculatetheRIlevelwhentotallinecoronaisassumed,ananalyticalformulaisdeducedforintegraloperation.Basedontheabovesolutions,analgorithmispresentedandappliedtothepredictionofRIlevelofapracticaloverheadtransmissionline.Comparisonofpredictionandmeasurementresultsindicatesthatthealgorithmproposedinthispaperiseffectiveandfeasible.

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简介：Weconductedalong-termmonitoringexperimentontheLutuanxiluBridgelocatedinChangpingDistrictofBeijing,employingourrecentlydevelopedreal-timebridgemonitoringsystembasedontheGuralpCMG-6TDbroadbandseismometer.Weidentifiedthemodalparameterswiththestochasticsubspaceidentification(SSI)algorithm,andcontinuouslymonitoredthetemporalvelocityvariationwithcodawaveinterferometry.Theresultsshowthat:(1)thehighlysensitiveGuralpCMG-6TDbroadbandseismometer,whichrecordsthethree-componentvibrationsignalwithinbroadfrequencyrange,iswellsuitedforlong-termbridgehealthmonitoring.(2)Withthecontinuousvibrationsignalfromambientexcitation,thestochasticsubspacealgorithmcanrobustlyidentifythelow-ordermodalparametersandthecodawaveinterferometrycanaccuratelymonitorthetinyvelocityvariation.(3)Theelasticmodulusofbridgematerialschangessignificantlyassociatedwithvaryingtemperature,leadingtodiurnalvelocityvariationwithamplitudeofapproximately1%.Thevelocityvariationshowsstrongnegativecorrelationwithtemperaturefluctuation.Meanwhile,themodalfrequenciesremainquitestable,suggestingthatthevelocityvariationmaybeamoresensitivequantitativedamageindex.(4)Whilethemodalfrequenciesreflecttheintegratedhealthstatusofthebridge,thevelocityvariationcanbeutilizedtomonitorthelocalelasticmodulus.Therefore,itiscrucialforbridgehealthmonitoringtocontinuouslymonitorthetwokeydamageindexesunderambientexcitation.