简介:一些材料的weldability在这篇论文用简单精明的节目被分析,并且测试数据的weldability通过数据库系统被分享。焊接过程与专家系统的帮助被设计,并且知识在焊接工程师之中被分享。不仅焊接文件的准备进步根据现在的过程资格记录(PQR)在资格测试的必要性上与数据库系统而且复杂决定被完成,制造代码被做。而且,当有足够的测试数据训练模型时,人工的神经网络(ANN)技术被证明是预言焊接关节的机械性质的有效方法之一。最后,在为焊接关节的微观结构建模的成就被介绍,特别在固体在影响热的地区(HAZ)和焊接熔融的水池的转变和谷物生长。
简介:ShapeMemoryAlloy(SMA)opticallyactivatedisthekeylechnologyofopticalSMAactivator,AccordingtotheshapememorymechanismofSMA,researchesaredoneontheactivatingresponsetimeandlightwavelengthofactivatingsourceelcofSMAopticallyactivatedtoapproachtheparameterswelectionofopticalactivation,SMAhastheoptimumefficiecyintherageof13secondsto27secondswhenSMAisilluminatedcontinuslybywavelengthof675nm;ThepoweroflightwavehasaloweffectonSMA;thelongertheactivatingwavelenth,thequickertheresponsetimeofSMAactivated,Iftheproperactivatingtimeandactivatingwavelength,areadopted,andthestructuredeformationofcompositematerialofSMAimbeddedmaybeactielycontrolled,andidealeffectwillbegotten,TheresarchprovidesanevdenceforthedesignofopticalSMAactivatorandisofgreatsignificncetoitsapplication,Theresarchonsmartstructurehasawideapplicationprospect.
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简介:Thisresearchfocusedonusingthewasterubberpowderasakindofregenerateresourcestoimprovethemechanicalpropertiesofcementmortar.ThetwokindsofhybridmodifiedrubberpowderTRPandATRPwerepreparedbysol-gelmethodandthenusedincementmortar.Thestructuresandpropertiesofthemwerestudied.ItisshownthatthenanoSi-O-SinetworkisgeneratedinTRPandATRPnetworksandthehydrophilicgroupisgraftedonthesurfaceofATRP.Themechanicalpropertiesofrubber-treatedmortar(RTM)weretestedandthemicrostructuresofthemwerealsostudied.Comparedtothemortarswithunmodifiedrubberpowders(RP),NaOHtreatedrubberpowder(SRP)andcouplingagenttreatedrubberpowder(CRP),theRTMwithATRPhasthehighestcompressivestrengthandflexuralstrength.Thestress-straincurvesshownthatthepeakofstressofRTMwithATRPisincreasedandindicatedthehighercompressiondeformationandtoughness.ItisfoundthattheinterfacialadhesionbetweentheATRPandcementmortarisincreaseddistinctlybySEM,whichresultsinenhancedductilityandmechanicalpropertiesofRTMwithATRP.
简介:Thegradingcriterionofblastingclassification,evaluatingindexandthecharacteristicvaluearetakenasmatterelements.First,therelationalfunctionisconstructedaccordingtothegradingcriterion,andthen,thegradeofrockblastingisevaluatedbythecomprehensiverelationaldegree.Theauthorhaspresentedasystemmethodofblastingclassificationofrock.Thepracticalexampleprovesthatitissimpleincalculationandreasonableinevaluation.
简介:Besidesthebiologicalgrowthfactors,smallorganicmolecules,andchemicalions,physicalsignalsistheothercategoryofveryimportantfactorstotune/regulatethefateofstemcells.Recentyears,moreattentionhasbeenpaidonthedifferentiationofstemcellsonthephysicalsignal,including,electricormagneticfield,surfacetopologyofbiomaterials,photoirradiation,andevenpressureandstrainfromthematerials.With
简介:模仿的austempered的一张连续冷却转变(CCT)图可锻的铁(ADI)焊接金属借助于Formastor-F图测量仪器被开发了,并且由与实际焊接作比较修订了。最后,修订的图被用来决定焊接技术。(编辑作者摘要)4个裁判员。
简介:AnewmethodforcorrosionprotectionofAl-basedmetalmatrixcomposites(MMC)wasdevelopedusingtwo-stepprocess,whichinvolvesanodizinginH2SO4solutionandsealinginrareearthsolution.Corrosionresistanceofthetreatedsurfacewasevaluatedwithpolarizationcurves.TheresultsshowedthattheeffectoftheprotectionusingrareearthsealingisequivalenttothatusingchromatesealingforAl6061/SiCp.TherareearthmetalsaltcanbeanalternativetothetoxicchromateforsealinganodizedAlMMC.
简介:钛氧化物(TiO2)上的Ag簇的形成nanoparticles被完成由selfassembly过程和锻烧。获得的nanoparticles被X光检查描绘衍射(XRD),传播电子显微镜学(TEM),和紫外可见光谱学(紫外力),并且常规技术(XRD,TEM并且紫外力)被用来在TiO2表面上识别Ag粒子。结果证明Ag-TiO2粒子能被使用改进苯乙烯氧化物的epoxidation的催化活动。苯乙烯氧化物作为由把Ag-TiO2nanoparticles用作催化剂的氧化剂是有H2O2的催化反应的主要产品。苯乙烯氧化物的高催化的activitity能在80el是可获得的被锻烧在1000
简介:在以前的工作,我们为来源术语S分析了评价的可行性(x,y,z)在横过的节。现在的学习涉及一个二维的反的阶段变化问题。目标从在稳固的地区的试验性地测量的温度是在液体地区(在精力方程的一个来源术语的重建)的驱散的热流动的评价。这个工作在厚度的钢焊接大约8厘米的电子横梁有一个应用程序。直接thermometallurgical问题在伪被对待稳定的二维的纵的节(x,y)。横梁排水量是通常在y方向。但是在伪稳定模拟,横梁在学习节是稳定的。样品在很少节在轴的方向z被划分。在每节,一个来源术语与横梁的部分被定义并且创造一个蒸发的地区和一个熔化地区。这个工作的目标是在每节与评价重建完全的来源术语。在这份报纸,我们分析评价的可行性。为这个工作,没有噪音,我们使用仅仅模仿的大小。