简介：Thispaperperformsanumericalsimulationofthree-dimensionalflowfieldinacentrifugalcompressorwithlonginletandoutletpipesusingCFXsoftware.Byarrangingvirtualprobesatdifferentpositionsinbothinletandoutletplanes,theaerodynamicperformanceofthecentrifugalcompressorismeasuredandcomparedwitheachother.Theneffectsofmeasuringpositionsonmeasurementresultsarediscussed.Theresultsshowthatitwillgeneratenotablemeasuringerrorsofthepressureratioandefficiencyiftheinlettotalpressureismeasuredusingasingle-pointprobe.Theinlettotalpressuredatacanbeaccuratewhentheyaremeasuredusinga3-pointrake.Theoutlettotalpressureandtotaltemperaturedatacannotbeaccurateiftheyarerespectivelymeasuredatonecircumferentialpositionevenusingamulti-pointrake.Increasingtangentialmeasuringpositionsattheoutletiseffectivetoimprovethetestaccuracy.Whentheoutlettotalpressureandtotaltemperaturearerespectivelymeasuredat3tangentialpositions,thedatacanbealmostaccurate.

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简介：在这份报纸，我们在场supercooled上的大小浇的深无弹性的中子散布的结果(吵闹)在毛孔以内限制了(平均毛孔直径~20)经由大音阶的第五音胶化方法通过alkoxide先锋Tetra-Methyl-Ortho硅酸盐的水解作用和polycondensation获得的一个混乱吸水的硅石矩阵。实验在二温度被执行(250K和210K，即在supercooled的通常认为的liquidliquid转变限制了水前后)在有hydrationh~40%w/w的一件湿样品上，它足够高有充满水的毛孔但是对足够低避免水结晶化。7%也是的几乎干燥的样品ath~调查了测量硅石矩阵的贡献到散布信号的中子。这是众所周知的，吵闹大小在系统允许吝啬的动能的决心和氢原子的动量分发因此，允许研究人员探查supercooled的本地结构限制的水。获得的主要结果是在210K，氢平均数动能比在250K稍微高相等或平。这与最近建议在水里描述氢的动能的温度依赖的一个semiempirical泛音模型的预言是不一致的。这是新、很有趣的结果，它建议在210K，水氢比在250K经历一个更生硬的分子间的潜力。这与liquidliquid转变假设一致。

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简介：Accordingtotheprincipleofthemicrowaveinterferometer,theaverageelectrondensityduetophasevariationobtainedbyinterferometercanbewrittenas:

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简介：Semiparametrictransformationmodelsprovideaclassofflexiblemodelsforregressionanalysisoffailuretimedata.Severalauthorshavediscussedthemunderdifferentsituationswhencovariatesaretimeindependent(Chenetal.,2002;Chengetal.,1995;Fineetal.,1998).Inthispaper,weconsiderfittingthesemodelstoright-censoreddatawhencovariatesaretime-dependentlongitudinalvariablesand,furthermore,maysuffermeasurementerrors.Forestimation,weinvestigatethemaximumlikelihoodapproach,andanEMalgorithmisdeveloped.Simulationresultsshowthattheproposedmethodisappropriateforpracticalapplication,andanillustrativeexampleisprovided.

简介：在铝合金的测量粒子地以内的空成核被调查开发哪个的一个连续统成核模型在单个粒子规模的reects成核。为异构的粒子分布的一个成核模型用平均成核紧张与Chu和裁缝的连续统模型一起被同步。在连续统模型的参数从粒子域被识别并且在在表金属形成观察的压力状态的范围上被评估。同步连续统成核模型在单轴的紧张，飞机紧张，和equal-biaxial紧张为三测量粒子域与成核趋势完成很好的同意。

简介：Thelocalthermalconductivityofpolycrystallinealuminumnitride(AlN)ceramicsismeasuredandimagedbyusingascanningthermalmicroscope(SThM)andcomplementaryscanningelectronmicroscope(SEM)basedtechniquesatroomtemperature.ThequantitativethermalconductivityfortheAlNsampleisgainedbyusingaSThMwithaspatialresolutionofsub-micrometerscalethroughusingthe3ωmethod.Athermalconductivityof308W/m·Kwithingrainscorrespondingtothatofhigh-puritysinglecrystalAlNisobtained.Theslightdifferencesinthermalconductionbetweentheadjacentgrainsarefoundtoresultfromcrystallographicmisorientations,asdemonstratedintheelectronbackscattereddiffraction.Amuchlowerthermalconductivityatthegrainboundaryisduetoimpuritiesanddefectsenrichedinthesesites,asindicatedbyenergydispersiveX-rayspectroscopy.