简介:有非线性赔偿的一个高速度列平行CDS/ADC电路在这份报纸被建议。相关双采样(CDS)和analog-to-digital变换器(模数转换器)工作基于二漂浮门inverters和开关电容器网络集成于一个三阶段的列平行电路。传统的单个斜坡的模数转换器的变换率被划分量子化到粗糙的步和好步加快。一个存储电容器被用来存储粗糙的步的结果并且定位好步的斜面信号的节,它能从2n把钟步骤归结为2(n/2+1)。漂浮的门inverters被实现减少电源消费。它的导致的非线性的偏移量被把一个赔偿模块介绍给inverter的输入取消,它能在建议电路的三个阶段使相等联合路径。这个电路与640为互补金属氧化物半导体图象传感器被设计并且模仿,
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简介:Withtheincreaseoftheclockfrequencyandsiliconintegration,powerawarecomputinghasbecomeacriticalconcerninthedesignoftheembeddedprocessorandsystem-on-chip(SoC).Dynamicvoltagescaling(DVS)isaneffectivemethodforlow-powerdesigns.However,traditionalDVSmethodshavetwodeficiencies.First,theyhaveaconservativesafetymarginwhichisnotnecessaryformostofthetime.Second,theyareexclusivelyconcernedwiththecriticalstageandignorethesignificantpotentialfreeslacktimeofthenoncriticalstage.Thesefactorsleadtoalargeamountofpowerwaste.Inthispaper,anovelpipelinestructurewithultra-lowpowerconsumptionisproposed.Itcutsoffthesafetymarginandtakesuseofthenoncriticalstagesatthesametime.Aprototypepipelineisdesignedin0.13mtechnologyandanalyzed.Theresultshowsthatalargeamountofenergycanbesavedbyusingthisstructure.Comparedwiththefixedvoltagecase,50%oftheenergycanbesaved,andwithrespecttothetraditionaladaptivevoltagescalingdesign,37.8%oftheenergycanbesaved.
简介:Basedonsimpleanalyticalequations,shortcircuitcurrentdensity(JSC)oftheorganicbulkheterojunctionsolarcellshasbeencalculated.ItisfoundthattheopticalinterferenceeffectplaysaveryimportantroleinthedeterminationofJSC;andobviousoscillatorybehaviourofJSCwasobservedasafunctionofthickness.Atthesametime,theinfluenceofthecarrierlifetimeonJSCalsocannotbeneglected.Whenthecarrierlifetimeisrelativelyshort,JSConlyincreasesattheinitialstageandthendecreasesrapidlywiththeincreaseofactivelayerthickness.However,forarelativelylongcarrierlifetime,theexcitondissociationprobabilitymustbeconsidered,andJSCbehaveswave-likewiththeincreaseofactivelayerthickness.Thevalidityofthismodelisconfirmedbytheexperimentalresults.
简介:Mesoscopic抑制了联合的相互的电容两倍回声电路被抑制泛音振荡器量子化的方法使量子化。Hamiltonian是由单一的转变的方法的diagonalized。这个电路的精力系列被给。费用的量变化和每个环的电流被thermofield动力学(TFD)的方法处于热刺激状态,热挤压的真空状态,热真空状态和真空状态调查。费用和水流的量变化与不仅电路有关是固有的参数并且联合刺激,挤压的系数,挤压的角度和环境温度的大小,而且量数字,这被显示出。并且量变化与时间随温度和腐烂的增加增加。CLC数字TN401由山东省,中国(No.XY05WL01)和大学的Heze大学的自然科学基础支持了山东省的试验性的技术基础,中国(No.S04W138)
简介:Withtheadvantagesoftransmittingenergyfrommultipledirectionstoonedirectionandtransformingvibrationfromonesourcetomultipledirections,thetwo-dimensionalvibrationdirectionconverterhasimportantapplicationsinpowerultrasonictechnology.However,forthecomplexityofusingthewaveequationtodesignandanalysisthetwo-dimensionalvibrationdirectionconverter,aconciseequivalentcircuitfortheconverterisinvestigated.Byintroducingthetwo-dimensionalmechanicalcouplingcoefficientandthelongitudinalforcetransformcoef-ficient,andusingtheelectromechanicalanalogyprinciple,theequivalentcircuitandresonancefrequencyequationofthetwo-dimensionalvibrationdirectionconvertervibratinginanti-phaseandin-phasetwo-dimensionalcoupledvibrationarededuced.Theresonancefrequenciesofthevibrationdirectionconvertersoftwodifferentmaterialsarecalculatedbyusingtheproposedfrequencyequation,whichareinagreementwiththeresultsfromthefiniteelementmethodandtheexperimentaltest.Itprovidesaconcisemethodforthedesignandapplicationsofsuchultrasonicvibrationsystem.
简介:Akindofdrivecircuitwhichislowpowerconsumption,high-performanceandhigh-poweroutputforsteppingmotor,basedonBY-5064,andakindofdedicatedcircuitfortwo-phasehybridsteppingmotoraredesigned,drivecontrolforsteppingmotorwithhigh-powerisachieved.
简介:Afast-speedpulsedetectorbasedonn-typeSi-Schottkydiodemountedinthewaveguideisinvestigated.Therelationofthefast-speedpulsedetectorbetweenresponsetimeand3dBbandwidthisanalyzed.Byadoptingthetunablecircuit,thematchedbandwidthisachievedaswideaspossible.Experimentalresultsshowthatthepulseresponsetimeofthedetectorislessthan150pswithinrandomcarriersignal500MHzbandwidthrangebetween35GHzto39GHzviatuningcircuit.Thedetectorisveryeasytooperatebecauseitdoesnotneedbiascurrentorsynch-pulsesource.
简介:Weproposeasingle-stepimplementationofamuti-target-qubitcontrolledphasegatewithonecatstatequbit(cqubit)simultaneouslycontrollingn—1targetcqubits.Thetwologicstatesofac.qubitarerepresentedbytwoorthogonalcatstatesofasinglecavitymode.Inthisproposal,thegateisimplementedwithnmicrowavecavitiescoupledtoasuperconductingtransnionqutrit.Becausethequtritremainsinthegroundstateduringthegateoperation,decoherencecausedduetothequtrit5senergyrelaxationanddephasingisgreatlysuppressed.Thegateimplementationisquitesimplebecauseonlyasingle-stcpoperationisneededandneitherclassicalpulsenormeasurementisrequired.Numericalsimulationsdemonstratethathigh-fidelityrealizationofacontrolledphasegatewithonecqubitsimultaneouslycontrollingtwotargetcqubitsisfeasiblewithpresentcircuitQEDtechnology.Thisproposalcanbeextendedtoawiderangeofphysicalsystemstorealizetheproposedgate,suchasmultiplemicrowaveoropticalcavitiescoupledtoanaturalorartificialthree-levelatom.
简介:Thispaperintroducedthebasictheoryandalgorithmofthesurrogatedatamethod,whichproposedarigorouswaytodetecttherandomandseeminglystochasticcharacteristicsinasystem.TheGaussiandataandtheRosslerdatawereusedtoshowtheavailabilityandeffectivityofthismethod.Accordingtotheanalysisbythismethodbasedontheshort-circuitingcurrentsignalsundertheconditionsofthesamevoltageanddifferentwirefeedspeeds,itisdemonstratedthattheelectricalsignalstimeseriesexhibitapparentlyrandomnesswhentheweldingparametersdonotmatch.However,theelectricalsignalstimeseriesaredeterministicwhenamatchisfound.Thestabilityofshort-circuitingtransferprocesscouldbejudgedexactlybythemethodofsurrogatedata.
简介:Theuniformcauliflower-likeZnOfilmsweredepositedontheconductingsubstratebyachemicalbathdepositioninurea/watersolution.ThefilmstructureandmorphologywerecharacterizedbyX-raydiffraction,thermogravimetricdifferentialthermalanalysis,energydispersivespectroscopy,selectedareaelectrondiffraction,fieldemissionscanningelectronmicroscopyandhighresolutiontransmissionelectronmicroscopy.TheaveragediameterofZnOnanoparticlesandthepetalthicknesswere25nmand8mm,respectively.Dyesensitizedsolarcellsbasedonthecauliflower-likeZnOfilmelectrodeshowedtheshort-circuitcurrentdensityof6.08mA/cm2,theopen-circuitphotovoltageof0.66V,thefillfactorof0.55andtheoverallconversionefficiencyof2.18%.TheequivalentcircuitofcellsbasedontheZnOfilmelectrodeswasmeasuredbytheelectrochemicalimpedancespectroscopy.Furthermore,theanalysisofequivalentcircuitprovidedtherelationshipbetweenthecellperformanceandtheinterfacialresistance,suchastheshuntresistanceandtheseriesresistance.
简介:Inthisstudy,wereportanefficientCdTe-SnO2quantumdot(QD)solarcellfabricatedbyheat-assisteddrop-castingofhydrothermallysynthesizedCdTeQDsonelectrospunSnO2nanofibers.Theas-preparedQDsandSnO2nanofiberswerecharacterizedbydynamiclightscattering(DLS),UV–Visspectroscopy,photoluminescence(PL)spectra,X-raydiffraction(XRD)andtransmissionelectronmicroscopy(TEM).TheSnO2nanofibersdepositedonfluorine-dopedtinoxide(SnO2)andsensitizedwiththeCdTeQDswereassembledintoasolarcellbysandwichingagainstaplatinum(Pt)counterelectrodeinpresenceofcobaltelectrolyte.TheefficiencyofcellswasinvestigatedbyanchoringQDsofvaryingsizesonSnO2.Thebestphotovoltaicperformanceofanoverallpowerconversionefficiencyof1.10%,anopen-circuitvoltage(Voc)of0.80V,andaphotocurrentdensity(JSC)of3.70mA/cm2wereobtainedforcellswithSnO2thicknessof5–6μmandcellareaof0.25cm2understandard1Sunillumination(100mW/cm2).Theefficiencywasinvestigatedforthesamesystemsunderpolysulfideelectrolyteaswellforacomparison.
简介:摘要:军工行业用印制电路板具有多品种、小批量、需求广以及元器件种类繁多等特性。印制电路板在设计过程和工艺过程中产生的诸多问题,若无法在前期得到预防和消除,那么一定会在后续的批量制造阶段暴露,而这些问题将会对生产制造过程带来极大的负担,从而严重制约生产周期和产品质量。本文将从产品质量管理、精益生产制造等角度阐述印制电路板的设计、工艺与制造,以期从设计人员角度改变部分印制电路设计的盲区,逐步改善某些旧习沉疴。同时,观察兄弟单位在印制电路设计、工艺与制造上的新手段、新做法,利用软件审核为手段、PDCA质量管理方法为核心的手段,建立有效机制进行审查、汇总、跟踪和反馈,疏通设计、工艺与制造之间的沟通渠道,提升印制电路板的可制造性设计能力。