简介：OnaccountofthemultiformityofMEMSdevices,itisnecessarytointegratewithsomeopticalmeasurementtechniquesformeetingstaticanddynamicunittestrequirements.Inthispaper,anautomatedMEMStestsystemisbuiltofsomecommerciallyavailablecomponentsandinstrumentsbasedonvirtualinstrumenttechnology.Thesystemisintegratedwithstroboscopicimaging,computermicro-vision,microscopicMirauphaseshiftinginterferometry,andlaserDopplervibrometer,andisusedforthemeasurementoffull-viewin-planeandout-of-planegeometricparametersandperiodicalmotionsandsinglespotout-of-planetransientmotion.Thesystemconfigurationandmeasurementmethodsareanalyzed,andsomeapplicationsofthemeasurementofin-planeandout-of-planedimensionsandmotionsweredescribed.Themeasurementaccuracyofin-planedimensionsandout-of-planedimensionalisbetterthan0.2μmand5nmrespectively.Theresolutionofmeasuringin-planeandout-of-planemotionsisbetterthan15nmand2nmrespectively.

简介：Toobtaintherelationshipbetweenuseofinstallmenttensioningtechnologyandthebearingcapacityofprestressedconcretebeams,tensileandcyclicloadingtestsareconductedonfiverectangularprestressedconcretedspecimens.Twotypesofprestressedtensioningmethodsareadoptedinthetests,oneusesinstallmenttensioningtechnologytotensionbeamsondays4,12,and8,12,respectively,andtheotheradoptstheconventionalmethodtotensionthebeamonday28only.Theageofconcrete,numberoftimestensioned,andtheprestressvalueofearlytensioningareconsideredintests.Resultsshowthatuseofinstallmenttensioningtechnologyhasnoeffectonthebendingfailurepatternofprestressedconcretebeams,butitreducesprestresslossandincreasescrackandyieldloads.

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简介：Topreventexpandedpolystyrene(EPS)beadsfromrisinguptothesurfaceinthemoldingprocessofEPSlightweightconcrete,vibrationwithpressurewasappliedandthepolyvinylacetate(PVA)emulsionwasadoptedtoimproveitsmechanicalproperties.Themechanicalproperties,thermalpropertiesanddurabilityofEPSlightweightconcreteweretested.ThemicrostructuresofEPSlightweightconcretewereobservedbyscanningelectronmicroscope(SEM).Vibrationwithpressurereducesthenumberofsmallcracks.The180dcompressivestrengthandflexuralstrengthincreaseobviouslyasalargeamountofPVAwasadded.ThemixedamountofPVAhasnoobviousinfluenceonthethermalperformancewhenitisnotmorethan10%ofthecement.VibrationwithpressureandsurfacemodificationofEPSbeadsbyPVAimprovethecombinationofEPSbeadswithcementstoneandthemechanicalpropertiesofEPSlightweightconcrete.

简介：有基础能由underpressure/positive压力技术渗透并且移居的桶的站台由外面/在里面抽水引起了桶。然而，桶基础的构造过程不能清楚地由于海环境的特殊性质被观察并且有效地控制了。由使用Multigen创造者的一个先进模拟开发工具，为有桶基础的平台的视觉构造模拟程序被开发基于Vega站台的第二等的开发技术在每个看法角度与相互作用控制和观察安装虚拟现实系统。应用程序结果证明方法由与四个桶基础为站台模仿整个构造过程可行、有效。