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185 个结果
  • 简介:一件塑造平方的热流动外套和一个塑造平方的热流动选矿厂根据稳定的州的热传导性的方程的不变性对称理论上被设计了。在这些设备的热流动的方向能是需要被调制。用并列转变的方法,在转变区域的不同类、各向异性的热传导性被获得了。二维的有限元素模拟被执行证实理论结果。

  • 标签: 物理学 理论 现状 发展
  • 简介:Inthispaper,weproposeaneffectiveVLSIarchitectureofsub-pixelinterpolationformotioncompensationintheAVSHDTVdecoder.Toutilizethesimilararithmeticaloperationsof15lumasub-pixelpositions,threetypesofinterpolationfiltersareproposed.Asimplifiedmultiplierispresentedduetothelimitedrangeofinputinthechromainterpolationprocess.Toimprovetheprocessingthroughput,aparallelandpipelinedcomputingarchitectureisadopted.Thesimulationresultsshowthattheproposedhardwareimplementationcansatisfythereal-timeconstraintfortheAVSHDTV(1920×1088)30fpsdecoderbyoperatingat108MHzwith38.18klogicgates.Meanwhile,itcostsonly216cyclestoaccomplishonemacroblock,whichmeanstheBframesub-pixelinterpolationcanberealizedbyusingonlyonesetoftheproposedarchitectureunderreal-timeconstraints.

  • 标签: VLSI体系结构 插值 高清晰度电视 编码
  • 简介:SincethedesignstudiesofsolidtritiumbreederblanketmodelshavebeenperformedbyJapanandEUC,andtheirTBMdesignoptionsforITERhavebeenproposed.InordertodesignourTBMblanketoptionswithChineseresearchbasesandexperiences,wechoseliquidlithiumorlithium-leadasthetritiumbreedingmaterialsforourTBMblanketoptions.Howeverthethicknessoffirstwallisusuallyonlyafewcentimeters,

  • 标签: ITER 第一壁 偏滤器靶板 热负荷 氚增殖包层模块
  • 简介:在动人的水平圆柱的热来源附近阶段变化材料融化的接触,在它的自己的重量下面下降了,在这篇文章被调查。在经常的表面热流动下面的一个融化的模型被建立。厚度和压力分布里面的分析结果融化层,稳定的融化速度被使用融化理论的接触获得。融化的法律被讨论,并且由温度差别与接触融化的相比开车。伪稳定的融化速度被热来源密度的热来源,和变化的热流动决定,这被发现在融化上有更少的效果速度。

  • 标签: 触点熔化 卧式气缸 相位变化现象 热处理
  • 简介:Boilingheattransferprocessisanalyzedinamoderatenarrowspaceconsistedoftwohorizontalplates,Themaindifferencebetweenthisprocessandtheconventionalunconfinedpoolboilingistheliquidsupplymechanismwhichisabsolutelypreventedbythegrowthofcoalescencebubblealongwiththeheatedsurfaceinthenarrowspace.Asaresult,themacrolayerbecomesthinnerduetotheevaporationoftheindividualbubbleswithinthemacrolayerduringtheperiodofbubblecoalescence,withorwithoutdryoutthatdependsonboththegapsizeofnarrowspaceandthesizeofheatedsurface.Foraspecifiedsizeoftheheatedsurface,theinitialthicknessoftheliquidlayerhasacriticalvaluewhichapproachesaconstantwhilethespaceheightislargerthanacriticalvalue.Theindividualbubblebehaviorsandtheheattransfercanbeconsideredasthesameasthatintheunconfinedpoolboiling,ifthespacegapislarge,However,theindividualbubblesdonotgenerateinthelastperiodofthebubblecoalescenceandalowermaximumheatfluxwillberesultedifthespacegapisreduced.Insuchacase,themacrolayerisdryout.

  • 标签: 热传导 临界热通量 狭小空间 沸腾
  • 简介:Bystudyingthetraditionalspectralreflectancereconstructionmethod,spectralreflectanceandtherelativespectralpowerdistributionofalightingsourcearesparselydecomposed,andtheorthogonalpropertyoftheprincipalcomponentorthogonalbasisisusedtoeliminatebasis;thenspectralreflectancedataareobtainedbysolvingasparsecoefficient.Aftertheoreticalanalysis,thespectralreflectancereconstructionbasedonsparsepriorknowledgeoftheprincipalcomponentorthogonalbasisbyasingle-pixeldetectoriscarriedoutbysoftwaresimulationandexperiment.Itcanreducethecomplexityandcostofthesystem,andhascertainsignificancefortheimprovementofmultispectralimageacquisitiontechnology.

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  • 简介:在一篇最近的文章[物理信A372(2008)417],王等。建议了一个方法,它被叫(G'/G)扩大方法,寻找非线性的进化方程的旅行波浪答案。包含KdV方程,mKdV方程,变体Boussinesq方程,和Hirota一种奶油色的陶器方程的参数的旅行波浪解决方案被使用这个方法获得。他们想(G'/G)扩大方法是一个新方法和许多非线性的进化方程的更多的旅行波浪答案能被获得。在这篇论文,我们将证明(G'/G)扩大方法等价于扩大tanh功能方法。

  • 标签: BOUSSINESQ方程 非线性演化方程 函数法 展开法 tanh函数方法 MKDV方程
  • 简介:Analyticalsolutionisobtainedofcoupledlaminarheat-masstransferinatubewithuniformheatflux.Thiscorrespondstothecasewhenalayerofsublimablematerialiscoatedontheinnersurfaceofatubewithitsoutersurfaceheatedbyuniformheatfluxandthiscoatedmaterialwillsublimeasgasflowsthroughtthetube.

  • 标签: 热传导 质量传输 均匀热通量
  • 简介:Floorplan,clocknetworkandpowerplanarecrucialstepsindeepsub-micronsystem-on-chipdesign.Anoveldi-agonalfloorplanisintegratedtoenhancethedatasharingbetweendifferentcoresinsystem-on-chip.Customclocknetworkcon-taininghand-adjustedbuffersandvariableroutingrulesisconstructedtorealizebalancedsynchronization.EffectivepowerplanconsideringbothIRdropandelectromigrationachieveshighutilizationandmaintainspowerintegrityinourMediaSoC.Usingsuchmethods,deepsub-microndesignchallengesaremanagedunderafastprototypingmethodology,whichgreatlyshortensthedesigncycle.

  • 标签: 片上多处理器系统 物理设计方法 平面布置图 快速原型制作
  • 简介:Aninversemethodispresentedforestimatingtheunknownboundaryincidentradiationheatfluxononesideofone-dimensionalsemitransparentplanarslabwithsemitransparentboundariesfromtheknowledgeoftheradiationintensitiesexitingfromtheotherside.Theinverseproblemissolvedusingconjugategradientmethodofminimizationbasedondiscreteordinatesmethod(DOM)ofradiativetransferequation.TheequationsofsensitivitycoefficientsarederivedandeasilysolvedbyDOM,withtheresultthatthecomplicatednumericaldifferentiationcommonlyusedinsolvingsensitivitycoefficientsisavoided.Theeffectsofanisotropicscattering,absorptioncoefficient,scatteringcoefficient,boundaryreflectivity,fluidtemperatureoutsidetheboundaries,convectionheattransfercoefficients,conductioncoefficientofsemitransparentmediaandslabthicknessontheaccuracyoftheinverseanalysisareinvestigated.Theresultsshowthattheboundaryincidentradiationheatfluxcanbeestimatedaccurately,evenwithnoisydata.

  • 标签: 热传导 半透明材料 反演辐射
  • 简介:Theflux-weakeningperformanceofapermanentmagnetbrushlessACdrivewasinvestigatedusingbothfloating-pointandfixed-pointDSPcontrollers.Asignificantcurrentoscillationwasobservedwhenthedrivewasoperatedathigh-speedintheflux-weakeningmodewiththefixed-pointDSP.Theinvestigationshowedthatthiswasduetotheon-linecompensationofthewindingresistancevoltagedropandquantisationerrorsassociatedwiththefixed-pointarchitectureoftheDSP.Asimplelook-uptableschemeisproposedtoeliminatetheoscillationandtoachieveextendedflux-weakeningcapability.

  • 标签: 数字信号处理器 电磁感应 永久性磁铁 流量减弱 电子机械
  • 简介:我们为创造在在超导的流动qubit附近放的二个分开的氮空缺中心旋转整体之间的宏观的纠缠的协调状态建议一个潜在地实际的计划。通过集体磁性的联合并且在里面流动qubit的situtunability,旋转整体的任意的纠缠的协调状态能从流动qubit和旋转整体的decoherence在影响下面与高成功可能性被完成。试验性的可行性和挑战用当前可得到的技术被认为正当。

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