简介：TheperformancesofnonlinearWDMsystemswithdifferentdutycyclearecomparedbymeansofnumericalsimulation.Thenumericalresultsshowthattheopticalpulsewithdutycycleof0.5issuperiortotheconventionalNRZmodulationschene.Theconclusionisdifferentfromthatofsomereferences.Thereasonisthatintersymbolinterferenceisnotincludedinsomereferences.Infact,intersymbolinterferenceplaysanimportantroleinmonlinearWDMsystem.Althoughthelargerthedutycycleis,thestrongertheeffectofthecross-phasemodulationandself-phasemodulationonnonlinearWDMishowever,thelargerthedutycycleis,thestrongertheintersymbolinterferenceis.

简介：Theprobe-fedpatchantennaswereproposedbychangingtheparameterssuchasdielectricmaterialsanddimensionsofpatchfordetailinvestigationofchangesinoutputcharacteristics.Fourrectangularslotswereintroducedseparatelyforoptimizingtheantennadesignandcharacteristics.Thisstudyillustratedthechangesofoutputcharacteristicsofanantennawithrespecttothenumberofintroducedslotsontheradiatingpatchinadditiontotheeffectofvariousdielectricmaterialsonantennaperformances.Theantennaperformanceswereanalyzedbyplottingtheobservationofvariousdielectricmaterials.Thechangesofantennacharacteristicswerealsoobservedbyintroducingfournumbersofslotsoneachedgeofthepatchtoimproveradiationcharacteristicswithawiderimpedancebandwidth.

简介：Theabsorptionspectrumofthecyclotrime-thylenetrinitramine(RDX)withfourdifferentparticlesizesaremeasuredinthefrequencyrangefrom0.1THzto2.5THzbyusingtheterahertztime-domainspectroscopy(THz-TDS),andthecharacteristicabsorptionpeaksareacquired.Allthesamplesaremeasuredinaloosecondition,whichisveryclosetotherealusingenvironmentoftheRDX.Theresultsshowthatthefourkindsofsampleshavesimilarabsorptionpeaksaroundthefrequencyof0.82THz,1.05THz,1.30THz,1.46THz,1.65THz,and1.95THz.Thesamplewithalargeparticlesizeobtainsmorepeaksthanthesmallone,whilethepeaksobtainedfromthesamplewithasmallsizearemoreprotrudent.Thereasonsforthesedifferencescanbetherefraction,scattering,andattenuationoftheterahertzwavewhenitpassesthroughthecrystalsamples.ThetheoreticalterahertzspectrumofRDXwassimulatedbyusingdensityfunctionalcalculations,inwhich,theBecke&Perdew-Wang’sfunctionalisusedinadoublenumericalpluspolarizationmethod(BP/DNP).Goodagreementsbetweentheexperimentalandcomputedresultsshowthatthethreepeakslocatedinthefrequencyof1.30THz,1.48THz,and1.96THzarecausedrespectivelybythetwistingofthree-nitrogenheterocyclic,thesymmetricaloscillationsofthedoublenitrogroups,andtheoscillationsofasinglenitrogroup.

简介：Q－doubleeffectofdifferentbalancebridgevoltagecontrolledcrystaloscillator(DBVCXO)isquantitativelyanalysedbythecomputersimulation.

简介：多晶的ZnO电影用收音机频率磁控管在是在不同时间的sputteretched的玻璃底层上劈啪作响被准备。两ZnO谷物和root-mean-square(RMS)的尺寸粗糙减少，底层的sputteretching时间增加。更多的Zn原子在这些电影被绑在O原子，并且缺点集中与增加底层的蚀刻噼啪声的时间被减少。同时，crystallinity和c轴取向在底层的更长蚀刻噼啪声的时间被改进。在99cm1，438cm1和589cm1的拉曼山峰作为E2被识别(低)，E2(高度)和E1(LO)模式，分别地并且E1(LO)山峰蓝色的位置变在更长蚀刻噼啪声的时间。这些电影的发射度，在底层上被扔并且为10蚀刻min和20min，比在30min的更长蚀刻噼啪声的时间下面扔的电影的在可见区域是更高的。bandgap随底层的蚀刻噼啪声的时间的增加从3.23eV增加到3.27eV。

简介：Theformaldehyde(HCHO)detectingatroomtemperatureisofgreatsignificance.DifferentratiosofP3HT/ZnOcompositefilms(3:1,1:1,and1:3)weredepositedontheorganicthinfilmtransistor(OTFT)byspray-depositiontechnology,andtheelectricalpropertiesandHCHO-sensingpropertiesofallthepreparedOTFTdevicesweremeasuredbyKeithley4200-SCSsourcemeasurementunit.TheresultsshowthattheOTFTsensorbasedontheP3HT/ZnOfilmswiththeratioof1:1exhibitedthebestoutputandtransfercurves.DifferentchangingtendencywereobservedwiththeincreaseofZnOproportionwhenexposedtoHCHOatroomtemperature,andthedevicewiththeratioof1:1behavedagoodresponseandrecoverycharacteristics.

简介：分别地，搬运器官的轻射出的设备(OLED)的层(HTL)的洞被真空免职和旋转涂层方法处理在哪儿N，N鈥?biphenyl-N，N鈥?二度(3-methylphenyl)-1,1鈥?biphenyl-4,4鈥?diamine(TPD)并且(vinylcarbazole)(PVK)poly充当了洞运输材料。Tris-(8-hydroxyquinoline)铝(Alq3)作为搬运层的轻射出的层和电子被利用。设备房间的基本结构是：indium-tin-oxide(ITO)/PVK：TPD/Alq3/Mg:Ag。设备的electroluminescent(EL)特征被描绘。结果证明EL系列的山峰在530nm被定位，它遵循了Alq3的描绘的光谱。与使用真空免职方法相比，有直到26135cd/m2的最大的发光性的绿排放能被用纺纱涂层技术选择合适的溶剂在15V的开车电压完成，并且它的最大的发光性效率是在5.5V的开车电压的2.56lm/W。CLC数字TN383+.1这个工程被部水平资助和UESTC的年轻优越工程赞助(资助号码：UESTC-2006206）

简介：数字模拟与沟在一个维的Ag电影单身者裂缝结构的光传播改进性质上被执行了。结果证明沟的位置，深度和数字在光传播上有大影响，并且出现电浆子电磁声子和回声模式是主要因素。35.8dB的最大的扑灭比率被调整沟深度在单个裂缝结构完成。

简介：Inthispaper,theinfluenceofthermalperformanceofcathode-heaterassemblyofTravelingWaveTube(TWT),whichhasdifferentcontactformbetweeninnerheatshieldandsupportingcylinder,isanalyzedusingthesimulationsoftwareANSYS.Withboththermalradiationandheatconductionareconsidered,thetemperatureandheatfluxdistributionofstructureswithdifferentcontactformarecalculated,andalsostartingtimewhichisneededbeforetemperaturecomeintosteadystatus.Theresultofanalysissuggeststhatchangingthecontactformbetweeninnerheatshieldandsupportcylindercaninfluencethethermalperformanceofcathode-heaterassemblyandimproveassembly'stemperaturedistributionandpromoteheater'sheatingefficiency.Theresultofthispaperprovidestheoreticalguidanceinthedesignofcathode-heaterassembly.

简介：Differentmaterial-dopedRamanfiberlaserswithveryhighefficiencyoperatingincontinuous-wavearepresented.With1WNd∶YVO4laserpumpingatwavelengthof1342nm,singlemodeoutputpowerofabove500mW(optical-to-opticalconversionefficiencyof50%)issimulatedintherangeof1400-1500nm.Usinghigh-germanium,high-phosphateandhigh-boratesilicatefibersasthegainmedium,laseroutputatwavelengthsof1420,1450,1480and1495nmcanbeachievedwithdifferentgeometries,whicharejustaspumpingC-bandandL-banddistributedRamanfiberamplifiers.

简介：Highspatialfrequencylaserinducedperiodicsurfacestructures(HSFLs)onsiliconsubstratesareoftendevelopedonflatsurfacesatlowfluencesnearablationthresholdof0.1J/cm2,seldomonmicrostructuresormicrogroovesatrelativelyhigherfluencesabove1J/cm^2.ThisworkaimstoenrichthevarietyofHSFLs-containinghierarchicalmicrostructures,byfemtosecondlaser(pulseduration:457fs,wavelength:1045nm,andrepetitionrate:100kHz)inliquids(waterandacetone)atlaserfluenceof1.7J/cm^2.TheperiodofSi-HSFLsintherangeof110–200nmisindependentofthescanningspeeds(0.1,0.5,1and2mm/s),lineintervals(5,15and20μm)ofscanninglinesandscanningdirections(perpendicularorparalleltolightpolarizationdirection).ItisinterestinglyfoundthatbesidesnormalHSFLswhoseorientationsareperpendiculartothedirectionoflightpolarization,bothclockwiseoranticlockwiserandomlytiltedHSFLswithamaximaldeviationangleof50°ascomparedtothoseofnormalHSFLSsarefoundonthemicrostructureswithheightgradients.RamanspectraandSEMcharacterizationjointlyclarifythatsurfacemeltingandnanocapillarywavesplayimportantrolesintheformationofSi-HSFLs.ThefactthatnoHSFLsareproducedbylaserablationinairindicatesthatmoderatemeltingfacilitatedwithultrafastliquidcoolingisbeneficialfortheformationofHSFLsbyLALs.Onthebasisofourfindingsandpreviousreports,asynergisticformationmechanismforHSFLsathighfluencewasproposedanddiscussed,includingthermalmeltingwiththeconcomitanceofultrafastcoolinginliquids,transformationofthemoltenlayersintoripplesandnanotipsbysurfaceplasmonpolaritons(SPP)andsecond-harmonicgeneration(SHG),andmodulationofSi-HSFLsdirectionbybothnanocapillarywavesandthelocalizedelectricfieldcomingfromtheexcitedlargeSiparticles.