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简介：AclassΦof5-dimensionalfunctionswasintroducedandanexistenceanduniquenessofcommonfixedpointsforafamilyofnon-selfmappingssatisfyingaφiquasi-contractiveconditionandacertainboundaryconditionwasgivenoncompletemetricallyconvexmetricspaces,andfromwhich,moregeneraluniquecommonfixedpointtheoremswereobtained.Ourmainresultsgeneralizeandimprovemanysametypecommonfixedpointtheoremsinreferences.

简介：Observationsofaquasi-90-dayoscillationinthemesosphereandlowerthermosphere(MLT)regionfromApril2011toDecember2014arepresentedinthisstudy.Thereisclearevidenceofaquasi-90-dayoscillationintemperaturesobtainedfromtheKunmingmeteorradar(25.6°N,103.8°E)andSoundingoftheAtmosphereusingBroadbandEmissionRadiometry(SABER),aswellasinwindobservedbytheKunmingmeteorradar.Thequasi-90-dayoscillationappearstobeaprominentfeatureinthetemperaturesandmeridionalwindtidesandpresentsquiteregularcyclesthatoccurapproximatelytwiceperyear.Theamplitudesandphasesofthequasi-90-dayoscillationintheSABERtemperatureshowafeaturesimilartothatofupward-propagateddiurnaltides,whichhaveaverticalwavelengthof~20kmabove70km.Intheloweratmosphere,asimilar90-dayvariabilityispresentedinthesurfacelatentheatfluxandcorrelateswiththetemperatureintheMLTregion.Similartothequasi-90-dayoscillationintemperature,a90-dayvariabilityofozone(O3)isalsopresentintheMLTregionandisconsideredtobedrivenbyasimilarvariabilityintheupwardly-propagateddiurnaltidesgeneratedintheloweratmosphere.Moreover,the90-dayvariabilityintheabsorptionofultraviolet(UV)radiationbydaytimeO3intheMLTregionisaninsitusourceofthequasi-90-dayoscillationintheMLTtemperature.

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简介：Amodelofquasi-CPA(chirpedpulseamplification)system,inwhichtheinputisthetransform-limitedGaussianpulses,issetupnumericallytoinvestigatetheimpactofthesecondorderdispersionontheadaptivecompensationofself-phasemodulation(SPM)effect.Theadaptivephasepre-shapingcontrolledbydifferentialevolutionalgorithmisintroducedtotheinputpulsebeforeamplificationandrecompression.Withmaximizingthepeakpoweroftheoutputpulse,thesimulationresultsshowthatthenormaldispersionisreallyhelpfultoeliminatethesidelobesoftheoutputpulseandincreasethepulsepeakpower.

简介：Inthispaper,weconsiderasystemoftwocubicquasi-linearKlein-Gordonequationswithdifferentmassesforsmall,smooth,compactlysupportedCauchydatainonespacedimension.Weshowthatsuchasystemhasglobalexistencewhenthenonlinearitiessatisfyaconvenientnullcondition.OurresultsextendtheglobalexistenceprovedbySunagawarecentlyunderthenon-resonanceassumptiontothatundertheresonanceassumption.

简介：Thispaperreportsahighpower,all-solid-state,quasi-continuous-wavetunableTi:sapphirelasersystempumpedbylaserdiode(LD)pumpedfrequency-doubledNd:YAGlaser.Themaximumtunedoutputpowerof4.2W(797nm)andtunedaveragepowerof3.7WwereachievedwhenfixingtheTi:sapphirebroadbandoutputpowerat5.0Wandapplying750-850nmbroadbandcoatedmirror.

简介：WeproposeapromisingschemetodecelerateaCWmolecularbeambyusingared-detunedquasi-cwsemi-Gaussianlaserbeam(SGB).WestudythedynamicalprocessofthedecelerationforaCWdeuteratedammonia(ND3)molecularbeambyMonte-Carlosimulationmethod.OurstudyshowsthatwecanobtainaND3molecularbeamwitharelativeaveragekineticenergylossofabout10%andarelativeoutputmolecularnumberofmorethan90%byusingasinglequasi-cwSGBwithapowerof1.5kWandamaximumopticalwelldepthof7.33mK.

简介：Anall-solid-statequasi-continuous-wavedispersioncavitytunableTi:sapphirelaserpumpedbyalaserdiodepumpedfrequency-doubledNd:YAGlaserisreported.Usingadenseflintglassprismasthedispersionelement,atuningrangefrom730to880nmwiththelinewidthof3nmandthepulsewidthof17.2nswasobtained.Themaximumoutput,powerofthislasersystemwas5.6Wat786.3nmcorrespondingtoanoptical-to-opticalconversionefficiencyof25.5%underthepumppowerof22W.

简介：Anewspectralproblemisproposed,andnonlineardifferentialequationsofthecorrespondinghierarchyareobtained.Withthehelpofthenonlinearizationapproachofeigenvalueproblems,anewfinite-dimensionalHamiltoniansystemonR2nisobtained.Ageneratingfunctionapproachisintroducedtoprovetheinvolutionofconservedintegralsanditsfunctionalindependence,andtheHamiltonianflowsarestraightenedbyintroducingtheAbel-Jacobicoordinates.Atlast,basedontheprinciplesofalgebracurve,thequasi-periodicsolutionsforthecorrespondingequationsareobtainedbysolvingtheordinarydifferentialequationsandinversingtheAbel-Jacobicoordinates.

简介：Weproposeaproof-of-principleexperimenttotestanewschemetoproduceasingle-cycleradiationpulseinfree-electronlasers(FELs).Here,afewα-BBOcrystalswillbefirstusedtoproduceanequallyspacedlaserpulsetrain.Then,thelaserpulsetrainilluminatesthecathodetoproduceafrequency-chirpedelectronbunchtraininaphotocathoderfgun.Finally,thefrequency-chirpedelectronbunchtrainpassesthroughataperedundulatortoproduceaquasi-single-cycleTHzpulse.Thisexperimentshouldallowcomparisonandconfirmationofpredictivemodelsandscalinglaws,andthepreliminaryexperimentalresultswillalsobediscussed.

简介：为拳头预定准备一主要固态包括1-methyl-3-propylimidazolium碘化物(MPII)的高有效的电镀物品传导性的材料，benzimidazole(双性人)，碘和锂碘化物被报导。在这电解质，双性人充当不仅添加剂而且gelators。与它的重要电气化学的性质，3.07%的全面效率不到AM1.5被完成(100mW/cm2)。

简介：Polymerbondedexplosives(PBXs)arehighlyparticle-filledcompositematerials.ThispaperexperimentallystudiesthetensiledeformationandfracturebehaviorofaPBXsimulationbyusingthesemi-circularbending(SCB)test.Thedeformationandfractureprocessofapre-notchedSCBsamplewitharandomspecklepatternisrecordedbyachargecoupleddevicecamera.Thedisplacementandstrainfieldsontheobservedsurfaceduringtheloadingprocessareobtainedbyusingthedigitalimagecorrelationmethod....

简介：Inthispaper,weintroducetheconceptofgeneralizedg-quasi-contractionsinthesettingofconeb-metricspacesoverBanachalgebras.Byomittingtheassumptionofnormalityweestablishcommonfixedpointtheoremsforthegeneralizedgquasi-contractionswiththespectralradiusr(λ)oftheg-quasi-contractiveconstantvectorλsatisfyingr(λ)∈[0,1/s)inthesettingofconeb-metricspacesoverBanachalgebras,wherethecoefficientssatisfiess≥1.Themainresultsgeneralize,extendandunifyseveralwell-knowncomparableresultsintheliterature.

简介：Wedemonstratedexperimentallytheformationofmonoenergeticbeamsofacceleratedelectronsbyfocusingfemtosecondlaserradiationwithanintensityof2×1017W/cm2ontotheedgeofanaluminumfoil.Theelectronshadenergydistributionspeakinginthe0.2–0.8MeVrangewithenergyspreadlessthan20%.Theaccelerationmechanismrelatedtothegenerationofaplasmawaveasaresultofself-modulationinstabilityofalaserpulseinadenseplasmaformedbyaprepulse(arriving12nsbeforethemainpulse)isconsidered.One-dimensionalandtwo-dimensionalParticleinCell(PIC)simulationsofthelaser–plasmainteractionshowedthateffectiveexcitationofaplasmawaveaswellastrappingandaccelerationofanelectronbeamwithanenergyontheorderof1MeVmayoccurinthepresenceofsharpgradientsinplasmadensityandinthetemporalshapeofthepulse.

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简介：Concerningthespecificdemandonsolvingthelong-termconjugateheattransfer(CHT)problem,anewalgorithmoftheglobaltightly-coupledtransientheattransferbasedonthequasi-steadyflowfieldisfurtherputforward.Comparedtothetraditionalloosely-coupledalgorithm,thecomputationalefficiencyisfurtherimprovedwiththegreatlyreducedupdatefrequencyoftheflowfield,andmoreovertheupdatestepoftheflowfieldcanbereasonablydeterminedbyusingtheengineeringempiricalformulaoftheNusseltnumberbasedonthechangesoftheinletandoutletboundaryconditions.Takingaductheatedbyinnerforcedairflowheatingprocessasanexample,thecomparingresultstothetightly-coupledtransientcalculationbyFluentsoftwareshowsthatthenewalgorithmcansignificantlyimprovethecomputationalefficiencywithareasonableaccuracyonthetransienttemperaturedistribution,suchasthecomputingtimeisreducedto22.8%and40%whiletheductwalltemperaturedeviationare7%and5%respectivelyusingtwoflowupdatetimestepof100sand50sonthevariableinlet-flowrateconditions.

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