简介：

简介：Thescalingandsimilarityofwallboundedturbulentflowwerestudied.Thepropertiesofsuchflowsandtherelationshipbetweenapowerlawandalogarithmictypeofvelocitydistributionwereinvestigated.Basedonthephysicalmechanisminvolved,ourresultsshowthatthepowerlawandthelogarithmicdistributionareonlydifferentformswiththesamehypothesisandholdonlyintheouterflowzone.Thus,auniversalexplanationforvariousempiricalformulaeofvelocitydistributionwasobtained.Manning’sformulawasstudiedtoexplaintheoreticallytheexperientialresultthattheroughnesscoefficientisonlyacomprehensiveparameterofthewholesystemwithoutacorrespondingphysicalfactor.Thephysicalmechanismofthevelocitydistributionofparalleltowallboundedflowwasexplored,theresultsshowthattheparametersintheformulaofvelocitydistributionareindicesofthesystemrespondingtoflowingenvironmentalfactorstorepresentgeneralcaseofboundaryroughnessandtheflowingstate,correspondingphysicalmechanismisvortexmotion.

简介：Hightemperaturesuprerconductor(HTS)currentleadhasanadvantageinreducingelectricpowerconsumptionofarefrigeratorforalargecurrentsuperconductingmagnetsystemsuchasafusiondevice.Afusiondevicerequiresmorethan20pairsoflargecurrentleadsandeachcurrentcapacityisabout60kA.Theconventional60kAcurrentleadneeds100kWelectricpowerforrefrigerationanda2/3reductionisavailablebytheapplicationofaHTScurrentlead.

简介：NumericalsimulationsoftheflowinthedrafttubeofaFrancisturbinearecarriedoutinordertoelucidatetheeffectsoftangentialvelocityonflowstability.Influenceofthelocationofthemaximumtangentialvelocityisexploredconsideringtheequalityofthetotalenergyattheinletofthedrafttube.Itisfoundthattheamplitudeofthepressurefluctuationdecreaseswhenthelocationofthemaximumofthetangentialvelocitymovesfromthecentretothewallonthecrosssection.Thus,thestabilityoftheflowinthedrafttubeincreaseswiththemovingofthelocationofthemaximumtangentialvelocity.However,therelativehydrauliclossincreasesandtherecoverycoefficientofthedrafttubedecreasesslightly.

简介：在这份报纸，陶器的蜂房改革者的热转移数字地基于计算液体动力学被模仿数字分析软件CFX5。改革者和气体的纵的温度分发被获得。有时间的温度的变化被讨论。另外，象打开时间，在改革者的入口的煤气的温度，改革者的高度和再生材料的特定的热那样的一些参数的效果加热浸透时间被讨论。它为再生热转移机制的进一步的学习提供了首先理论上的基础。关键词改革者-数字模拟-热浸透时间-高温度空气燃烧CLC数字TK124

简介：

简介：ＭｏｍｅｎｔｕｍＤｉｓｔｒｉｂｕｔｉｏｎｏｆＰｒｏｄｕｃｔｓｆｒｏｍＴｒａｎｓｆｅｒａｎｄＦｒａｇｍｅｎｔａｔｉｏｎＴｒａｎｓｆｅｒａｎｄＦｒａｇｍｅｎｔａｔｉｏｎ￥ＷｕＺｈｏｎｇｌｉＴｈｅｍｏｍｅｎｔｕｍｄｉｓｔｒｉｂｕｔｉｏｎ...

简介：DuringthereactionbetweencalciumsorbentsandSO2,calciumsorbentsarefirstcalcinedandconvertedintoCaO.CaOcanbeobtainedbycalciningCa(OH)2orCaCO3.Theporosityofthesorbentisincreasedbecauseofcalcinationandisdecreasedbecauseofsulfurization.InthecalcinationprocessH2OorCO2isescapedfromtheparticlesandporesareformedinparticles.ThereactionorconvertrateofCaOisinfluencedstronglybytheporestructurecharacters.FromCa(OH)2toCaOtheescapevelocityofH2Ooritsmasstransferisoneofthekeyfactorsinfluencingtheporeforming.Duringcalcinationprocessdifferentheatingvelocity,differentheatingtimeandtemperatureweresuggested.Thetemperaturerisingrateandcalciningtemperatureplayimportantroletotheporestructure.TheconvertratesofCaOobtainedthroughdifferentcalciningconditionswereinvestigatedexperimentally.SomeinterestingresultswereshowedthatthecalciumutilizationofCaOparticlesisdeterminednotonlybythespecialsurfaceareaandtotalporevolume,butalsobypore-sizedistribution.Themainfactorinfluencingthesulfationistheporediameterdistributionatlowersulfationtemperature.Forhigherreactiontemperaturespecificvolumeistheimportantreason.Butpore-sizedistributionisstronglyinfluencedbyheatfluxandtemperatureinthecalciningprocess.

简介：

简介：把温度分发用作一个外部参数改变对称并且在铝测量声学的回声的频率光谱堵住，我们在混乱台球调查精力层次的统计和动力学。精确地提取回声并且消除噪音的影响，为泛音倒置的一个filter-diagonalization方法被用来为低数量因素回声系统克服常规快Fourier变换方法的低分辨率。我们在场一改善并且试验性地学习量系统的混乱特征的可行模拟方法。

简介：

简介：

简介：Manyreal-worldsystemscanbemodeledbyweightedsmall-worldnetworkswithhighclusteringcoefficients.Recentstudiesforrigorouslyanalyzingtheweightedspectraldistribution(WSD)havefocusedonunweightednetworkswithlowclusteringcoefficients.Inthispaper,werigorouslyanalyzetheWSDinadeterministicweightedscale-freesmall-worldnetworkmodelandfindthattheWSDgrowssublinearlywithincreasingnetworkorder(i.e.,thenumberofnodes)andprovidesasensitivediscriminationforeachinputofthismodel.ThisstudydemonstratesthatthescalingfeatureoftheWSDexistsintheweightednetworkmodelwhichhashighandorder-independentclusteringcoefficientsandreasonablepower-lawexponents.

简介：Adiode-pumpedalkalivaporlaser(DPAL)isoneofthemostpromisingcandidatesofthenext-generationhigh-poweredlasersource.Asthesaturatednumberdensityofalkalivaporishighlydependentonthetemperatureinsideavaporcell,thetemperaturedistributioninthecross-sectionofacellwillgreatlyaffectthehomogeneityofalasermediumandtheoutputcharacteristicsofaDPAL.Inthispaper,wedevelopedanalgorithmbasedontheregimeconcludingquasi-HilberttransformtoevaluatethephaseaberrationofawavefrontwhentheprobebeampassesthroughthevaporcellplacedinonearmofaMach–Zehnderinterferencesetup.Accordingtothetheoreticalalgorithm,wededucedthetemperaturedistributionofacesiumvaporcellfordifferentheatingconditions.Thestudyisthoughttobeusefulfordevelopmentofahigh-poweredlaser.

简介：InrecentlypublishedpaperbyYangChunxin[1],Ireexaminedthepaper.Onpage128,thepaper'pointedoutthatthesizeandspatialdistributiondensityofnucleationsitespresentedonrealboilingsurfacecanbedescribedbythenormalizedfractaldistributionfunction,andthephysicalmeaningofparametersinvolvedinsomeexperimentalcorrelationsproposedbyearlyinvestigationsareidentifiedaccordingtofractaldistribution'.However,thedefinitiononfractaldimensiongivenbyYang[1]ishighlyquestionable,andtheresultsobtainedbyYangarecontradictorytothebasicfractaltheory.Herearemycomments:

简介：提高技术的力量质量(PQ)的主要目的为敏感负担在需要的频率维持指定电压大小不管力量分发网络上的差错。动态电压restorer(DVR)是过去常减轻电压的一台设备下垂调整负担电压。这篇论文论述一个数学模型因为导致系列电压注射减轻从而下垂象在DVR和用途之间分享的力量一样完成用途力量因素的改进。分享的力量将作为每要求就可得到的分布式的产生(DG)而言补偿sags。减轻电压的途径用领先的系列电压注射的概念下垂对在电压的阶段移动不引起任何问题的那些地点合适。MATLAB/SIMULINKSimPowerSystem工具箱被用来获得模拟结果验证建议数学模型。

简介：Inthepresentpaper,weshallrigorouslyre-establishtheresultofthesingle-particlefunctionofaquantumdotsystematfinitetemperature.Unliketheproofgiveninourpreviouswork(Phys.Rev.B74195414(2006)),wetakeadifferentapproach,whichdoesnotexploittheexplicitexpressionoftheGibbsdistributionfunction.Instead,weonlyassumethatthestatisticaldistributionfunctionofthequantumdotsystemisthermodynamicallystable.Asaresult,weareabletoshowclearlythattheelectronicstructureinthequantumdotsystemiscompletelydeterminedbyitsthermodynamicstability.Furthermore,theweakerrequirementsonthestatisticaldistributionfunctionalsomakeitpossibletoapplythesamemethodtothequantumdotsystemsinnon-equilibriumstates.

简介：现在的工作在5离子系统上扩大以前的工作考虑7-ionsystem(即，Au~(47+)～Au~(53+))。更高度收了离子，被发现那，例如，Au~(53+)，Au~(54+)等等，能能然而，不太高度被忽视控告的离子，例如，Au~(47+)，Au~(46+)等等，是相当重要的。因此，考虑8离子系统的一个新想法，即，Au~(46+)～Au~(53+)，是在进行中的。作为补充，我们讨论同时的反应，它将在这种工作是重要的。

简介：

简介：