简介：Thispaperpresentsanexperimentalstudyofthethree-dimensionalturbulentflowfieldsinalowspeedannularcascadeofhighturningangleturbineblades.Detailedmeasurementswereperformedonthebladesurfacesandmid-streamsurfaceinthepassageandatthreeaxialplanesdownstreamofthecascadebyusingwallstaticpressuretaps,afive-holeprobeandahot-wireanemometer,Thetestdataincludestaticpressuredistributiononbladesurfaces,totalpressurelosscofeeicient,meanflowvelocitycomponents.radialflowangle,turbulenceintensityandReynoldsshearstress.Analysesofthethree-dimensionalcascadeflowcharacteristicsweremadeonthenosetlocationofhighlossvortices.thevariationofpressuregradientinsidethecascadepassageandthepropertiesofendwallboundarylayerstotalpressurelossdistributions,secondaryvortexturbulentdissipationandwakedecaydowntreamofthecascade.Theseexperimentalresultsarevaluableforrevealingthedetailsofthecomplexvortexflowstructureinmodernhighlyloadedaxialturbomachinesandvalidatingthethree-dimensionalflownumericalcomputationcodes.

简介：TheproblemofcheckingrobustD-stabilityofmulti-inandmulti-out(MIMO)systemswasstudied.Threesystemmodelswereintroduced,i.e.multilinearpolynomialmatrix,polytopicpolynomialmatrixandfeedbacksystemmodel.Furthermore,theconvexpropertyofeachmodelwithrespecttotheparametricuncertaintieswasestablishedrespectively.Basedonthis,sufficientconditionsforD-stabilitywereexpressedintermsoflinearmatrixinequalities(LMIs)involvingonlytheconvexvertices.Therefore,therobustD-stabilitywastestedbysolvinganLMIoptimalproblem.

简介：Theauthorsprovetheglobalexistenceofweaksolutionsto2-DincompressibleNavier-Stokesequations(invorticity-streamformulation)withiaitialvorticityinL^4/5.ItmaybethebestresultthatcanbeobtainedforinitialvorticityinL^pform.Moreover,theuniqueneasistobeprovedhere.

简介：为angle-interlockwoven的有弹性的行为分析的一个微机械模型陶器的composites在这篇论文被建议。这个模型由在空间，在邻近的纱之间的洞和纱的实际剖面图几何学认为纤维是波动和连续性考虑实际织物结构。基于laminate理论，编织的3D角度联锁的有弹性的性质陶器的composites被预言。交叉的纬的不同数字几乎有一样的有弹性的moduli。陶器的矩阵的厚度在有弹性的moduli上有小效果。当波动比率增加纵的模量减少和另外的幼仔的moduli增加时。在理论预言和试验性的结果之间的好同意在分析编织的3Dangle-interlock的有弹性的性质表明建议模型的可行性陶器的composites。这篇论文的结果验证分析聚酯矩阵composites的方法对编织陶器的composites合适的事实。

简介：Inthispaper,weconsidertheblow-upofsmoothsolutionstothe3DidealMHDequations.Let(u,b)beasmoothsolutionin(0,T).Itisprovedthatthesolution(u,b)canbeextendedaftert=Tif(↓Δ×u,↓Δ×b)∈L^1(0,T;B∞，∞^0).ThisisanimprovementoftheresultgivenbyCaflisch,Klapper,andSteele.

简介：寻找和刻画各类有代表性的特殊本原矩阵的指数集,国内外都已有许多结果.这里研究和刻画d个环点的n阶极小本原矩阵的指数集为{[n/d]+n-2,[n/d]+n-1,…,n-2d-1}.

简介：让{X，Xn；n鈮?1}i.i.d的一个序列是随机变量，前=0，前2=蟽2<鈭？给Sn=X1+X2+吗？+Xn，Mn=最大k鈮鈭k鈭？n鈮?1。让n=O(1/木头木头n)。在这份报纸，我们证明那，为b>?1，

简介：FournewtaxanediterpenoidswereisolatedfromthebarkofTaxusyunnanensis.Theirstructureswereelucidatedasthenewskeletonwith5/7/6/4memberedringsbyspectralanalysisand2DNMRshiftcorrelationexperiments.

简介：Inthispaper,weinvestigatethecouplingofnaturalboundaryelementandfiniteelementmethodsofexteriorinitialboundaryvalueproblemsforhyperbolicequations.Thegoverningequationisfirstdiscretizedintime,leadingtoatime-stepscheme,whereanexteriorellipticproblemhastobesolvedineachtimestep.Second,acircularartificialboundaryFRconsistingofacircleofradiusRisintroduced,theoriginalprobleminanunboundeddomainistransformedintothenonlocalboundaryvalueprobleminaboundedsubdomain.AndthenaturalintegralequationandthePoissonintegralformulaareobtainedintheinfinitedomainΩ2outsidecircleofradiusR.Thecoupledvariationalformulationisgiven.Onlythefunctionitself,notitsnormalderivativeatartificialboundaryΓR,appearsinthevariationalequation,sothattheunknownnumbersarereducedandtheboundaryelementstiffnessmatrixhasafewdifferentelements.Suchacoupledmethodissuperiortotheonebasedondirectboundaryelementmethod.Thispaperdiscussesfiniteelementdiscretizationforvariationalproblemanditscorrespondingnumericaltechnique,andtheconvergenceforthenumericalsolutions.Finally,thenumericalexampleispresentedtoillustratefeasibilityandefficiencyofthismethod.

简介：Inthiswork,anewmethodtodealwiththeunconnectedpixelsinmotioncompensatedtemporalfiltering(MCTF)ispresented,whichisdesignedtoimprovetheperformanceof3Dliftedwaveletcoding.Furthermore,multipledescriptionscalablecoding(MDSC)isinvestigated,andnovelMDSCschemesbasedon3Dwaveletcodingareproposed,usingtheliftingimplementationoftemporalfiltering.TheproposedMDSCschemescanavoidthemismatchprobleminmultipledescriptionvideocoding,andhavehighscalabilityandrobustnessofvideotransmission.Experimentalresultsshowedthattheproposedschemesarefeasibleandadequatelyeffective.

简介：这篇论文为3D在一张无穷地长圆柱的嘴在亚声的流动的全球存在和稳定性上涉及这个问题稳定的潜在的流动方程。如此的一个问题被Courant-Friedrichs显示在[8，p。377]：通过管的流动应该是被考虑一稳定，isentropic，无旋与圆柱的对称流动并且应该由与适当边界条件解决3D潜力流动方程坚定。由介绍一些合适加权的H?lder空格并且建立priori估计，当在否定无穷的亚声的流动的国家被给时，作者在一张3D嘴证明亚声的潜在的流动的全球存在和稳定性。关键词亚声的流动-潜在的流动方程-Bessel功能-加权的H?lder空格-全球存在2000苏布杰克特先生分类35L70-35L65-35L67-国家Basic支持的76N15工程中国(号码2006CB805902)的研究节目，中国(号码10871096)的国家自然科学基础和为江苏大学的先进才能的研究基础。

简介：

简介：AnefficientroutetoprepareL-glucoseandL-galactoseisdescribed.TheL-sugarsareachievedbyusingthestrategyofswitchingthefunctionalgroupsatC1andC5ofD-glucoseandD-mannose.TheoxidationandreductionofthesilylenoletheratC1andthelead(IV)tetraacetatemediatedoxidativedecarboxylationatC5arethekeysteps.L-GlucoseandL-galactosearepreparedinaconvenientandinexpensiveway.

简介：研究算子本身的性质是研究算子不动点问题的一个重要方法.很多学者在二维的空间中,通过构造不同的压缩映射或者膨胀映射的条件,研究算子的不动点问题.在这篇文章中,我们将引入D-度量空间和D-Ⅲ型膨胀映射的概念,在D-度量空间（三维的空间）中研究D-Ⅲ型膨胀映射的不动点及公共不动点定理.

简介：

简介：Thefastions,producedinD-3Hefusionplasma,arethe14.7MeVprotonsand3.6MeVαparticles.Becausetheirslowingdowntimesarefinite,therefore,theydevelopacertainamountofadditionalbeta(fir)whichhastobesupportedbythemagneticfield.

简介：Anapproachforgeneratinginteractive3Dgraphicalvisualizationofthegeneticarchitecturesofcomplextraitsinmultipleenvironmentsisdescribed.3Dgraphicalvisualizationisutilizedformakingimprovementsontraditionalplotsinquan-titativetraitlocus(QTL)mappinganalysis.Interactive3DgraphicalvisualizationforabstractexpressionofQTL,epistasisandtheirenvironmentalinteractionsforexperimentalpopulationswasdevelopedinframeworkofuser-friendlysoftwareQTLNetwork(http://ibi.zju.edu.cn/software/qtlnetwork).Noveldefinitionofgraphicalmetasystemandcomputationofvirtualcoordinatesareusedtoachieveexplicitbutmeaningfulvisualization.Interactive3DgraphicalvisualizationforQTLanalysisprovidesgeneticistsandbreedersapowerfulandeasy-to-usetooltoanalyzeandpublishtheirresearchresults.

简介：Theadsorptionpropertytheoperatinglife,theoperatingexchangecapacityandregenerationofD412macroporousphosphonomethylaminachelatingresinforremovingCa2+,Mg2+andFe2+fromhighpHbrineofalkaliproductionbyionicmembranewereinvestigatedTheresinshowedgoodphysical-chemicalandkineticproperty,highexchangecapacity,excellentdurability.

简介：

简介：摘要现阶段，3D打印技术的快速发展和进步，引起了全球范围内的普遍关注。3D打印技术成熟性迅速提升，其打印速度及准确性也随之持续提升，同时所需打印成本有所减少。所以说，相当一部分人觉得3D打印技术必然会引发“第三次工业革命”。