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47 个结果
  • 简介:在一个二维的方形的数组的螺线波浪的开发由于部分离子隧道块(钾,钠)被调查,节点的动力学被HodgkinHuxley神经原描述,这些神经原最近被结合邻居连接。参数比率xNa(并且xK),它定义钠(钾)的工作离子隧道数字的比率到钠的全部的离子隧道数字(并且钾),被用来测量隧道块导致的移动传导力。在二参数的阶段空间(参数比率对毒害的区域)的统计可变R的分发广泛地被计算为部分离子隧道块导致的螺线波浪的转变标记参数区域,有同步R的更小的因素的区域被联系那个螺线波浪使明白毒害的隧道、柔韧的参数区域。当毒害的区域(钾或钠)和沉醉的度是小的时,螺线波浪保持活着,不同转变(死亡,几个螺线波浪共存或多手臂螺线波浪出现)发生在中等比率xNa下面(并且xK)当堵住的区域的尺寸超过某些阀值时。螺线波浪的决裂发生,螺线的多手臂飘动当隧道噪音被考虑时,被观察。

  • 标签: 诱导作用 螺旋波 子信道 神经元 Wave 死亡
  • 简介:我在场为二接收装置的到也的从一个发送者的一个一般two-qubit状态的概率的遥远的准备的一个新计划。量隧道由一个部分纠缠的分成三部分的GreenbergerHorneZeilinger(GHZ)状态和一个W类型状态组成。我试着由分别地使用平常的射影的测量和积极珍视操作员的措施的方法认识到遥远的two-qubit准备。有不同方法以及全部的古典通讯费用的计划的相应成功可能性在这要求计划也被计算。

  • 标签: 非对称信道 比特 远程 制备 量子态 控制
  • 简介:这份报纸论述对流动结构和热的隧道几何学的影响的学习转,并且也,他们一个光线的冷却段落的所有墙上的关联煤气的汽轮机片当模特儿。调查在隧道集中于热转移和空气动力学的大小,它是在飞机引擎使用的配置的一个精确代表。为热转移系数和在内部冷却段落的设计使用的压力落下的关联经常从简化模型被开发。一个角落切,对真实引擎段落没有完美的矩形的生气的节的笔记重要,但是包括,肋骨与切半径和特殊取向。因此,这个工作为有很现实主义的特征的光线的冷却几何学的一个模型提供详细液体流动和热转移数据。

  • 标签: 流动结构 几何形状 燃气轮机叶片 传热 流道 发动机结构
  • 简介:Inthispaper,anewdevelopedmulti-channelpre-processingcircuitforsignalsfromtemperaturesensorwasintroducedinbrief.Thiscircuitwasdevelopedtocollectandamplifythesignalsfromtemperaturesensor.Thisisauniversalcircuit.Itcanbeusedtoprocessthesignalsfromthermocouplesandalsousedtoprocesssignalsfromthermistors.Thiscircuitwasmountedinastandardbox(440W×405D×125Hmm)asaninstrument.The

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  • 简介:与飘移散开(DD)的联合使用模型,试验性的测量参数和小信号的正弦曲线不变的分析,我们为4H-SiC提取Y参数埋葬隧道的金属氧化物半导体域效果晶体管(BCMOSFET)。输出电线走火水流获得G,梅森的不变的U分别地在普通来源的配置f(T)和摆动f(最大)的最大的频率为外推的统一水流获得频率被计算。这里f(T)=800MHz和f(最大)=5GHz为4H-SiCBCMOSFET被提取,当地效果活动性到达它的山峰时,珍视87cm(2)/Vs什么时候V-GS=4.5V。模拟结果清楚地证明4H-SiCBCMOSFET和地效果活动性的典型频率是优异的,由于新奇结构,与常规MOSFET相比。

  • 标签: 移动扩散模式 稳定状态分析 参数变化 4H-SIC
  • 简介:Veryrecently,theBelleandBESIIIexperimentsobservedanewcharmonium-likestateX(3823),whichisagoodcandidatefortheD-wavecharmonium(13D2).BecausetheX(3823)isjustneartheDˉDthreshold,thedecayX(3823)!J=+??canbeagoldenchanneltotestthesignificanceofcoupled-channeleffects.Inthiswork[1],thisdecayisconsideredincludingboththehidden-charmdipionandtheusualquantumchromodynamicsmultipoleexpansion(QCDME)contributions.

  • 标签: IDENTIFY COUPLED-CHANNEL EFFECTS
  • 简介:Wehavedesignedandrealizedanathermal4-channelwavelength(de-)multiplexerinsiliconnitride(SIN).Minimizedthermalsensitivityisachievedinawidewavelengthrangebyusingwideandnarrowwaveguideswithlowanddifferentthermal-opticcoefficientsinthetwoarmsofMach-Zehnderinterferometers(MZIs).TheSiNcorelayerandSiO2claddinglayersaredepositedbyalow-temperatureplasma-enhancedchemicalvapordep-ositionprocess.ThefabricatedMZIfilterexhibitsathermalsensitivitywithin4-2.0pm/℃inawavelengthrangeof55nmtonear1300nm.Then,anathermal(de-)multiplexerbasedoncascadedMZIshasbeendemonstratedwithacrosstalk〈-22dBandathermalsensitivity〈4.8pm/℃forallfourchannels,reducedby77%comparedtoaconventionalSiN(de-)multiplexer.OwingtothepassiveoperationandcompatibilitywiththeCMOSback-endprocess,ourdeviceshavepotentialapplicationsin3Dintegrationofphotonicsandelectronics.

  • 标签: 氮化硅 通信技术 发展现状 材料学
  • 简介:Differentinterpretationsareintroducedtodescribetheuprisingoscillatorystructuresof^16O+^24Mgreaction.Thegrossresonantstructurestotheground-andfirst-excitedstateshavebeenstudiedsuccessfullyintermsofboththeDWBAandcoupledchannelcalculations.TheDWBAresultsintroduceareasonabledescriptionoftheangulardistributionsandexcitationfunctiondata.ThecoupledchannelcalculationsprovideabetteragreementwiththeexperimentalforwardandbackwardangledatathantheDWBAcalculations.

  • 标签: 核反应 重离子反应 ^16O ^24Mg
  • 简介:Electron-wallinteractionisalwaysrecognizedasanimportantphysicalproblembecauseofitsremarkableinfluencesonthrusterdischargeandperformance.Basedonexistingtheories,anelectrodeispredictedtoweakenelectron-wallinteractionduetoitslowsecondaryelectronemissioncharacteristic.Inthispaper,theelectron-wallinteractioninanAton-typeHallthrusterwithlow-emissiveelectrodesplacedneartheexitofdischargechannelisstudiedbyafullykineticparticle-incellmethod.Theresultsshowthattheelectron-wallinteractionintheregionofsegmentedelectrodeisindeedweakened,butitissignificantlyenhancedintheremainingregionofdischargechannel.Itismainlycausedbyelectrodeconductivepropertywhichmakesequipotentiallinesconvextowardchannelexitandevenparalleltowallsurfaceinnear-wallregion;thisconvexequipotentialconfigurationresultsinsignificantphysicaleffectssuchasrepellingelectrons,whichcausestheelectronstomovetowardthechannelcenter,andtheelectronsemittedfromelectrodestoberemarkablyaccelerated,therebyincreasingelectrontemperatureinthedischargechannel,etc.Furthermore,theresultsalsoindicatethatthedischargecurrentinthesegmentedelectrodecaseislargerthaninthenon-segmentedelectrodecase,whichisqualitativelyinaccordancewithpreviousexperimentalresults.

  • 标签: 电子发射特性 分割电极 放电通道 相互作用 数值研究 出口
  • 简介:一种极端狭窄的双隧道的过滤器原则上被建议anddemonstrated试验性地。这个过滤器借助于二个取样的纤维布拉格栅栏(SFBG)被设计,在一个人是周期的0-pi采样,其它是对称的空间采样的地方。Theformer能在传播系列创造二stopbands,后者能生产twoultra-riarrow通带。我们的过滤器有大约1下午的3-dB带宽,其价值是二ordersof大小不到传统的SFBG过滤器的带宽。建议过滤器有隧道间距仍然是的amerit未改变当调节过滤器时。

  • 标签: 光学纤维 布拉格光栅 滤波器 对称性
  • 简介:ThispaperproposesanadaptivejointsourceandchannelcodingschemeforH.264videomulticastoverwirelessLANwhichtakesintoaccounttheusertopologychangesandvaryingchannelconditionsofmultipleusers,anddynamicallyallocatesavailablebandwidthbetweensourcecodingandchannelcoding,withthegoaltooptimizetheoverallsystemperformance.Inparticular,sourceresilienceanderrorcorrectionareconsideredjointlyintheschemetoachievetheoptimalperformance.Andachannelestimationalgorithmbasedontheaveragepacketlossrateandthevarianceofpacketlossrateisproposedalso.Twooverallperformancecriteriaforvideomulticastareinvestigatedandexperimentalresultsarepresentedtoshowtheimprovementobtainedbythescheme.

  • 标签: MULTICAST OVER 802.11 WIRELESS local area
  • 简介:Anovelstructureisproposedfordoublingtheverticalbreakdownvoltageofsilicon-on-insulator(SOI)devices.Inthisnewstructure,theconventionalburiedoxide(BOX)inanSOIdeviceissplitintotwosections:thesource-sectionBOXandthedrain-sectionBOX.Ahighly-dopedSilayer,referredtoasanon-depletionpotential-clampedlayer(NPCL),ispositionedunderandclosetothetwoBOXsections.InthesplitBOXesandtheSiregionabovetheBOXes,theblockingvoltage(BV)isdividedintotwopartsbytheNPCL.ThevoltageintheNPCLisclampedtobenearlyhalfofthedrainvoltage.Whenthedrainvoltageapproachesabreakdownvalue,thevoltagesustainedbythesource-sectionBOXandtheSiregionunderthesourcearenearlythesameasthevoltagesustainedbythedrain-sectionBOXandtheSiregionunderthedrain.TheverticalBVisthereforealmostdoubled.TheeffectivenessofthisnewstructurewasverifiedforaP-channelSOIlateraldouble-diffusedmetal-oxidesemiconductor(LDMOS)andcanbeappliedtootherhigh-voltageSOIdevices.ThesimulationresultsshowthattheBVinanNPCLP-channelSOILDMOSisimprovedby55%andthespecificon-resistance(Ron,sp)isreducedby69%incomparisontotheconventionalstructure.

  • 标签: SOI器件 MOS结构 LDMOS P沟道 夹层 金属氧化物半导体
  • 简介:TheenigmaticchargedstatesZc(3900),Zc(4020),Zc(4050),Zb(10610),andZb(10650)arestudiedwithinacoupled-channelSchr¨odingermodel[1],whereradiallyexcitedquark-antiquark(qˉq)pairs,withthesameangularmomentaandisospinasthea1(1260)andb1(1235),arestronglycoupledtotheirOkubo-Zweig-Iizuka-allowedde-caychannelsDˉD+ˉDDandDˉD,orBˉB+ˉBBandBˉB,inSandD-wave.Poles,matchingtheexperimentalmassandwidthofalltheabovestates,arefoundbyvaryingonlytwofreeparameters.In

  • 标签: Radially EXCITED AXIAL
  • 简介:Thelocalpressuredistributionsandresistancecoefficients(f1andf2)throughthesharp180degturninarelativelyshort(L/De=4)two-passsmoothandrib-roughenedchannelwereinvestigatedforaReynoldsnumberrangeof1.0×10^3,9.0×10^3.Theribpitch-to-herghtratios(p/e)were5,10,and20,Theribheight-to-hydraulicdiamterratios(e/De)were0.025,0.050and0.10,andtheribanglesofattack(a)were90,45,60,-45,and-60deg.Ridswereinstallednotonlyinbeforeandafterturnregionsbutalsointurnregion.TheresultsshowthatresistancecoefficientsremainapproximatelyconstantwhenReynoldsnumberismorethan3.0×10^4,Theeffectsoftheribconfiguration(ribspacing,ribheight,andriborientation)ontheinletstraightductresistancecoefficient(f2)weresignificant,however,theireffectsontheoverallresistancecoefficient(f1)weredilutedbythesharp-180turn.Forthisrelativelyshortchannel(L/De=4),theoverallresistancecoefficient(f1)wasgreatlyaffectedbythesharpturn.Correlationsfortheoverallresistance(f1)andinletstraightductresistancecoefficient(f2)arepresented.

  • 标签: 燃气透平机 光滑管道 粗糙管道 压力损失
  • 简介:Weproposeanultra-simpledual-channelconfigurationforsimultaneouslyevaluatingtwobranchesofamultifunctionalintegratedopticchip(MFIOC).Intheconfiguration,theMFIOCisemployedasabeamsplittertoconstructthedemodulationinterferometertogetherwitha2×2fibercoupler.InterferencehappensbetweenpolarizationmodestravelingthroughdifferentchannelsoftheMFIOC.Thecross-couplingsofeachchannelarerespectivelycharacterizedbytheinterferencepeakswhichdistributeonoppositesidesofthecentralinterferencepeak.TemperatureresponsesoftheMFIOCareexperimentallymeasuredfrom-40°Cto80°C.Resultsshowthattheproposedconfigurationcanachievesimultaneousdual-channeltransientmeasurementswithresolutionof-90dBanddynamicrangeof90dB.Inaddition,thetwochannelsoftheconfigurationhaveconsistentmeasuringperformance,andthetwobranchesoftheMFIOChavedifferentresponsestotemperaturevariation.

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