简介：WestudythehomogenizationoftheincompressibleNavier-Stokesequationswithperiodicoscillatingcoefficientinaboundednon-homogeneousmedia.Todothat,weintroduceageneralizedcompensatecompactnessresultandasuitableclassoftestfunctiontothisproblem.Bypassingthelimit,weobtainthehomogenizedmodelofthisproblem.

简介：ThisstudyusesNCEP/NCARdailyreanalysisdata,NOAAoutgoinglong-waveradiation(OLR)data,thereal-timemultivariateMJO(RMM)indexfromtheAustralianBureauofMeteorologyandTibetanPlateauvortex(TPV)datafromtheChengduInstituteofPlateauMeteorologytodiscussmodulationoftheMadden-JulianOscillation(MJO)ontheTibetanPlateauVortex(TPV).Waveletandcompositeanalysisareused.ResultsshowthattheMJOplaysanimportantroleintheoccurrenceoftheTPVthatthenumberofTPVsgeneratedwithinanactiveperiodoftheMJOisthreetimesasmuchasthatduringaninactiveperiod.Inaddition,duringtheactiveperiod,thenumberoftheTPVsgeneratedinphases1and2islargerthanthatinphases3and7.Aftercompositingphases1and7separately,allmeteorologicalelementsinphase1areapparentlyconducivetothegenerationoftheTPV,whereasthoseinphase7aresomewhatconstrained.Withitseastwardpropagationprocess,theMJOconvectioncentrespreadseastward,andtheverticalcirculationwithinthetropicalatmospherechanges.Duetotheinteractionbetweenthemid-latitudeandlow-latitudeatmosphere,changesoccurinthebarocliniccharacteristicsoftheatmosphere,theavailablepotentialenergyandeddyavailablepotentialenergyoftheatmosphere,andthecirculationstructuresoftheatmosphereovertheTibetanPlateau(TP)andsurroundingareas.Thisresultsinsignificantlydifferentwatervapourtransportationandlatentheatdistribution.Advantageousanddisadvantageousconditionsthereforealternate,leadingtoasignificantdifferenceamongthenumbersofplateauvortexindifferentphases.

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简介：Byusingtherefinementofthestandardintegralaveragingtechnique,weobtainsomeoscillationcriteriaforsecondordermixednonlinearellipticequations.Theresultsestablishedinthispaperextendandimprovesomeexistingoscillationcriteriaforhalf-linearPDEintheliterature.

简介：IthaslongbeenacknowledgedthattherearetwotypesofElNioevents,i.e.,theeasternPacificElNio(EE)andthecentralPacificElNio(CE),accordingtotheinitialpositionoftheanomalouswarmwateranditspropagationdirection.Inthispaper,theoceanicandatmosphericevolutionsandthepossiblemechanismsofthetwotypesofElNioeventswereexamined.ItisfoundthatalltheElNioevents,CEorEE,couldbeattributedtothejointimpactsoftheeastwardadvectionofwarmwaterfromthewesternPacificwarmpool(WPWP)andthelocalwarmingintheequatorialeasternPacific.BeforetheoccurrenceofCEevents,WPWPhadlongbeeninastateofbeinganomalouswarm,sothestrengthofeastwardadvectionofwarmwaterwasmuchstrongerthanthatofEE,whichplayedamajorroleintheformationofCE.WhilefortheEEevents,mostcontributioncamefromthelocalwarmingoftheequatorialeasternPacific.ItisfurtheridentifiedthattheimmediatecauseleadingtothedifferenceofthetwotypesofElNioeventswastheasynchronousvariationsoftheSouthernOscillation(SO)andtheNorthernOscillation(NO)asdefinedbyChenin1984.WhenthetransitionfromthepositivephaseoftheNO(NO+)toNO-waspriortothatfromSO+toSO-,therewouldbeeastwardpropagationofwesterlyanomaliesfromthetropicalwesternPacificinducedbyNOandhencethegrowthofwarmseasurfacetemperatureanomaliesinWPWPanditseastwardpropagation.ThiswasfollowedbylaggedSO-inducedweakeningofsoutheasttradewindsandlocalwarmingintheequatorialeasternPacific.ThesewereconducivetotheoccurrenceoftheCE.Onthecontrary,thetransitionfromSO+toSO-leadingthetransitionofNOwouldfavortheoccurrenceofEEtypeevents.

简介：Thispaperinvestigatesaclassofevenorderfunctionaldifferentialequationswithdampedterm,andderivestwonewoscillatorycriteriaofsolution.

简介：Abstract.Inthispaper,theoscillationcriteriaforthesolutionsofthenonlineardifferentiale-quationsofneutraltypeoftheforms:

简介：我们调查了之间的差别同温层(S类型)并且在intraseasonal时间的tropospheric(T类型)北极摆动(AO)事件可伸缩，以他们对表面空气温度的影响(坐)在北半球和与他们的空间结构联系的动态特征上。S类型AO事件证明一个平流层对流层联合了结构，当T类型事件展出了一个平流层对流层时解开的结构。在北半球上的环形的容纳的异例被发现与S类型AO事件被联系，而如此的一个环形的特征是实质地在T类型AO事件的destructed。在二种类型的对流层的不同水平结构能主要被归因于强迫的短暂旋涡反馈。至于Ttype事件的垂直地解开的结构，把他们区分开来与S类型事件的内在的动态特征在地带地限制的Rossby波浪的垂直繁殖躺着。在T类型事件，在一垂直波导存在的地方，地带地限制的Rossby波浪包能在东北亚洲上从重要高度异例发出，然后向上宣传进平流层。相反，如此的垂直繁殖不为S类型事件是明显的。在T类型事件从对流层与地带地限制的Rossby波浪的向上的注射联系的同温层的异例能进一步通过在climatological想PW和异常PW之间的干扰导致行星的波浪(PW)的异常垂直繁殖，导致最后的平流层对流层T类型事件的解开的结构。

简介：Basedonresearchesmadebytheauthorinrecentyears,discussionismadeofthequasi-40-dayoscillation(QDO)natureanditscharacteristicpropagation,withemphasisontheSouthernHemispheremill-latitudequasi-periodiccoldairforcingonthetropicalatmospherequasi-40-dayoscillationalongwithitseffectupontheNorthernHemispheresummermonsoon.Itisproposedthattheinteractionbetween,orlateralcouplingof,meridionalcirculationsystemsmayserveasthemechanismoftheoscillationpropagationinameridionaldirection.

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简介：ByRiccatitransformation,weestablishsomenewoscillationcriteriaforaclassofevenorderdelaydifferentialequationswithnonlinearterm.Insomesense,theresultsobtainedextendsomeknownresultsintheliterature.

简介：在这份报纸，我们与meromorphic系数ofiterated顺序调查更高的orderhomogenous和非同类的线性微分方程的复杂摆动，并且获得改进并且延长Z.X.陈给的那些的一些结果，L.Kinnunen，等等。

简介：AclassofnonlinearcoupledsystemforElNino-SouthernOscillation(ENSO)modelisconsidered.Usingtheasymptotictheoryandmethodofvariationaliteration,theasymptoticexpansionofthesolutionforENSOmodelsisobtained.

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

简介：Strongasymmetricalvorticesappearontheleewardofslenderbodyathighanglesofattack,whichhasveryunfavorableeffectonthestabilityandcontroloftheaircraft.Amethodisdevelopedtocontrolthesideforceofslenderbodyathighanglesofattack,andisverifiedinwindtunnel.Athin-filmtriangularself-excitedoscillationflagisfixedatthetipoftheslenderbodymodelwhosesemi-apexangleis10°.Sideforceisapproximatelylinearlyproportionaltoroll-settingangleofself-excitedoscillationflagathighanglesofattack,andtheslopoffittingstraightlineobtainedbytheleastsquaremethodis-0.158.Thelinearrelationshipbetweensideforceandroll-settingangleprovidesconveniencefordevelopingsideforcecontrollawofslenderbodyathighanglesofattack.Experimentaldatashowsthatthesideforcecoefficientsvarylinearlywithroll-settingangleswhenaspecificplasticself-excitedoscillationflagisusedasthecontrolflag.Therangeofsideforcecoefficientandroll-settingangleare,respectively,-3.2to3.0and-20°to20°.Thedeviceissimple,effective,andisofgreatpotentialinengineeringapplication.

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：在在灰尘天气的半球和它的可能的角色的低频率摆动在2002在诺思中国上袭击事件作为案例研究被分析。结果证明阿留申群岛之土人Low在3060天的摆动上在南半球与环极涡旋被连接，与趋于加深可能对尘暴事件的产生有用的阿留申群岛之土人Low的弱环极涡旋。在这后面的可能的机制是吝啬的经向环流的内部半球的相互作用，与在东亚上的主要可变性。在在上面的水平对流层的南半球的高纬度的带的吝啬的偏午可以带北半球的，它然后在北半球影响地方性环流。因此，低频率摆动电视连接是在在诺思中国上在南半球发行量和灰尘事件之间联合的一个可能的连接。然而，内部低频率摆动的年变化是不清楚的。

简介：Basedonobservationsandreanalysisdata,thecharacteristicsoftheevolutionofclimatologicalspringprecipitationoverSouthernChina(SPSC)andtheassociatedclimatologicalintraseasonaloscillation(CISO)andatmosphericcirculationarestudied.ResultsshowthatSPSCincreasesinanoscillatoryway.AlthoughtheevolutionofSPSCissimilarindifferentregions,therearealsodifferences.IndifferentregionsofSouthernChina,theonsetdatesoftherainseasonarefromthe12thto24thpentadandthepeakdatesareafterthe20thpentad.CISOisanimportantcomponentofSPSC,whichisnotonlystatisticallysignificant,butalsoaccompaniesadynamicallycoherentstructure.Thepeakwet/dryphaseofeachCISOcyclecorrespondstoasignificantrainfallincreasing/decreasingperiodandmodulatestheevolutionofSPSC.TherainfallgrowthinthesecondhalfofMarchandmid-Aprilistheresultofthemodulation.Thewet/dryphaseofCISOisaccompaniedbylow-levelconvergent(upper-leveldivergent)andcyclonic(anti-cyclonic)circulation,whichfavorsascendingmotiontodevelopoverSouthernChina.

简介：Thispaperdiscussestheoscillationofsolutionsforsystemsofnonlinearneutraltypeparabolicpartialfuctionaldifferentialequationsoftheform