简介：Efficientoptimizationstrategyofmultibodysystemsisdevelopedinthispaper.AugmentedLagrangemethodisusedtotransformconstrainedoptimalproblemintounconstrainedformfirstly.Thenmethodsbasedonsecondordersensitivityareusedtosolvetheunconstrainedproblem,wherethesensitivityissolvedbyhybridmethod.Generalized-αmethodandgeneralized-αprojectionmethodforthedifferential-algebraicequation,whichshowsmoreefficientpropertieswiththelagertimestep,arepresentedtogetstatevariablesandadjointvariablesduringtheoptimizationprocedure.Numericalresultsvalidatetheaccuracyandefficiencyofthemethodsispresented.

简介：Inthispaper,anovelinterferometricmethodwithawiderangeofsensitivities,calledholographyquasiprojectionmoire,isproposed.Itcombinesthefeaturesofthevariateddoubleprojectionmoiremethodandtheholographicinterfer-ometrymethod.Thistechniqueisusedtostudythefailuremodesofmicroelectronicpackagingmodules.

简介：Inthispaper,afullythird-orderaccurateprojectionmethodforsolvingtheincompressibleNavier-Stokesequationsisproposed.Toconstructthescheme,acontinuousprojectionprocedureisfirstlypresented.Wethenderiveasufficientconditionforthecontinuousprojectionequationstobetemporallythird-orderaccurateapproximationsoftheoriginalNavier-Stokesequationsbymeansofthelocaltruncation-error-analysistechnique.Thecontinuousprojectionequationsarediscretizedtemporallyandspatiallytothird-orderaccuracyonthestaggeredgrids,resultinginafullythird-orderdiscreteprojectionscheme.Thepossibilitytodesignhigher-orderprojectionmethodsisthusdemonstratedinthepresentpaper.Aheuristicstabilityanalysisisperformedonthisprojectionmethodshowingtheprobabilityofitsbeingstable.Thestabilityofthepresentschemeisfurtherverifiedthroughnumericaltests.Thethird-orderaccuracyofthepresentprojectionmethodisvalidatedbyseveralnumericaltestcases.

简介：Althoughthestructuredlightsystemthatusesdigitalfringeprojectionhasbeenwidelyimplementedinthree-dimensionalsurfaceprofilemeasurement,themeasurementsystemissusceptibletonon-linearerror.Inthiswork,weproposeaconvenientlook-up-table-based(LUT-based)methodtocompensateforthenon-linearerrorincapturedfringepatterns.Withoutextracalibration,thisLUT-basedmethodcompletelyutilizesthecapturedfringepatternbyrecordingthefull-fielddifferences.Then,aphasecompensationmapisestablishedtorevisethemeasuredphase.Experimentalresultsdemonstratethatthismethodworkseffectively.