简介：

简介：Weproposeaphotonicstructurestackedsequentiallybyone-dimensionalphotoniccrystalsandcavities.Thewholestructureiscomposedofsingle-negativeanddouble-negativematerials.TheopticalWannier–Starkladder(WSL)canbeobtainedinalowfrequencyregionbymodulatingthewidthsofthecavitiesinorder.Wesimulatethedynamicalbehavioroftheelectromagneticwavepassingthroughtheproposedphotonicstructure.Duetothedispersivecharacteristicsofthemetamaterials,averynarrowWSLcanbeobtained.Thelong-periodelectromagneticBlochoscillationisdemonstratedtheoreticallytohaveaperiodonamicrosecondtimescale.

简介：我们报导当前的摆动anddc-voltage-controlled的详细理论研究在做的GaAs/AlAs反响的通道超点阵在下面的混乱动力学交叉电并且磁场。当超点阵在否定微分速度区域被偏导时，当前的自激振荡与合适的做的集中被观察。当前的摆动模式和摆动频率能被dc电压偏爱影响，做密度，并且磁性删除。什么时候交流电与固定振幅删除，频率也被用于系统，不同非线性的性质与dcvoltage的变化出现在外部电路偏爱。我们小心地与不同检测混乱的方法学习这些非线性的性质。

简介：在由nonoscillatory节点组成的复杂网络的自我支撑的摆动在多样的自然、社会的系统吸引了长期的兴趣。我们在由易兴奋的节点组成的随机的网络学习自我支撑的周期的摆动。我们由使用驾驶方法的主导的阶段进展揭示内在的动态结构。摆动来源和波浪繁殖路径能经由揭示的动态结构清楚地被说明。当时，我们能基于我们的理解与令人惊讶地高的效率控制摆动。

简介：

简介：Gas-liquidcouplingoscillationisanovelapproachtoreducingtheresonantfrequencyandtoelevatingthepressureamplitudeofathermoacousticengine.Ifathermoacousticengineisusedtodrivelow-frequencypulsetuberefrigerators,thefrequencymatchingbetweenthethermoacousticengineandtherefrigeratorplaysanimportantrole.Basedonanacoustic-electricanalogy,alumpedparametermodelisproposedtoestimatetheresonantfrequencyofastanding-wavethermoacousticenginewithgas-liquidcouplingoscillation.Furthermore,asimplifiedlumpedparametermodelisalsodevelopedtoreducethecomputationcomplexity.Theresonantfrequencydependenceonthemeanpressure,thegasspacevolume,andthewatercolumnlengthiscomputedandanalyzed.Theimpactofdifferentworkinggasesontheresonantfrequencyisalsodiscussed.Theeffectivenessofthemodelsisvalidatedbycomparingthecomputedresultswiththeexperimentaldataofthegas-liquidcouplingoscillationsystem.Anincreaseinthemeanworkingpressurecanleadtoariseintheresonantfrequency,andalowerresonantfrequencycanbeachievedbyelongatingtheliquidcolumn.Incomparisonwithnitrogenandargon,carbondioxidecanrealizealowerfrequencyduetoasmallerspecificheatratio.

简介：TheEINio-southernoscillation(ENSO)isaninterannualphenomenoninvolvedintropicalPacificoceanatmosphereinteractions.Inthispaper,wedevelopanasymptoticmethodofsolvingthenonlinearequationusingtheENSOmodel.BasedonaclassoftheoscillatoroftheENSOmodel,aapproximatesolutionofthecorrespondingproblemisstudiedemployingtheperturbationmethod.

简介：

简介：Theperiod-oneoscillationproducedbyanexternalopticalpulseinjectiondrivensemiconductorlaserisappliedtoclockrecoveryandfrequencydivision.Byadjustingtherepetitionrateorinjectionpoweroftheexternalinjectionopticalpulsestolockthedifferentharmonicfrequenciesoftheperiod-onestate,theclockrecoveryandthefrequencydivision(thesecondandthirdfrequencydivisions)areachievedexperimentally.Inaddition,infrequencylockingrangesof2GHzand1.9GHz,thesecondandthirdfrequencydivisionsareobtainedwiththephasenoiselowerthan-100dBc/Hz,respectively.Ourexperimentalresultsareconsistentwellwiththenumericalsimulations.