简介：Threekindsofmathematicalmodelsrepresentingweldingheatsourcesarepresented.Amongthem,Gaussianmodelanddoubleellipsoidalmodelareusedtoanalyzethethermaldistributionswithfiniteelementmethod.Atthesametime,thispaperanalyzedtheinfluencesoftheheatsourcemodels,thelatentheatandtheweldingparametersonthetemperaturedistributions.Thecomparisonsbetweenthesimulatedresultsandtheexperimentsshowdoubleellipsoidalmodelisgoodforthree-dimensionalnumericalsimulations.Furthermore,theadaptivemeshtechniqueisappliedinthethree-dimensionalmodelwhichgreatlyreducesthenumberofnodesandelementsinthesimulation.

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简介：与spintronics的发展，在二维的材料的氧的行为上的调查从来没停止过。由于它的活泼的性质，氧是难的在系统独自存在。然而，它将与另外的原子交往并且生产复杂轨道的杂交效果，它影响了材料的表演。特别为在nanoscale的材料，介绍氧原子是不可避免的，不管什么在准备的过程或采用。因此，在二维的薄电影关于氧行为的效果继续研究是必要的。在这篇论文，它将主要在磁性，电的性质，阶段转变，纺纱依赖者性质和热稳定性上介绍氧行为的效果，总结影响氧行为的几个因素，并且概括在氧行为后面的机制的研究进步。

简介：1ＩｎｔｒｏｄｕｃｔｉｏｎＳｏｍｅｏｒｇａｎｉｃｃｏｍｐｏｕｎｄｓｃａｎｔｒａｎｓｆｅｒｅｎｅｒｇｙａｂｓｏｒｂｅｄｉｎＵＶｒｅｇｉｏｎｔｏｒａｒｅｅａｒｔｈｉｏｎｓｗｈｉｌｅｔｈｅｙｃｏｏｒｄｉｎａｔｅｄｗｉｔｈｔｈｅｉｏｎｓａｎｄｔｈｅｎｔｈｅｒａｒｅｅａｒｔｈｉｏｎｓｅｍｉｔｃｈａｒａｃｔｅｒｉｓｔｉｃｆｌｕｏｒｅｓｅｎｃｅ.Ｔｈｅｌｕｍｉｎｏｕｓｉｎｔｅｎｓｉｔｙａｎｄｌｉｆｅｔｉｍｅｏｆｔｈｅｃｏｏｒｄｉｎａｔｅｄｒａｒｅｅａｒｔｈｉｏｎｓｉｓｍｕｃｈｍｏｒｅｔｈａｎｔｈｏｓｅｏｆｔｈｅｆｒｅｅｉｏｎｓ.Ｓｏｓｃｉｅｎｔｉｓｔｓｔａｋｅａｎｉｎｔｅｒｅｓｔｉｎｔｈｅｓｅｃｏｍｐｌｅｘｅｓ[1,2].Ｉｎｔｈｉｓｐａｐｅｒ,ｉｎｏｒｄｅｒｔｏｓｅｅｋｎｅｗｌｕｍｉｎｏｕｓｍａｔｅｒｉａｌｅｘｉｔｅｄｗｉｔｈｌｏｗｅｒｅｎｅｒｇｙ,ＥｉｇｈｔｃｏｍｐｌｅｘｅｓｏｆＥｕ3+ｗｉｔｈｐｙｒｉｄｉｎｅ2,6ｄｉｃａｒｂｏｘｙｌｉｃａｃｉｄ(Ｈ2ＤＰＣ)、1,10ｐｈｅｎａｎｔｈｒｏｌｉｎｅ(ｐｈｅｎ)ａｎｄｍｅｔｈｙｌｂｅｎｚｏｉｃａｃｉｄ(ＭＢＡ),ｉｎｃｌｕｄｉｎｇ...

简介：轧了nanorods被磁控管劈啪作响和加氨系统综合，并且Tb中间的层的厚度被改变学习效果在上轧了nanorods。结果被扫描电子测试显微镜学(SEM)，X光检查衍射(XRD)，传播电子显微镜学(TEM)，高分辨率的传播电子显微镜学(HRTEM)，和光致发光(PL)系列。结果证明Tb层的厚度在形式，质量，和光性质上有明显的效果轧了nanorods。在房间温度的PL系列在368点显示出一座很强壮的排放山峰?nm和弱排出物在387点达到顶点?当Tb层是20时，为生产样品的山峰的nm，和紧张到达最大值?nm。最后，20的最佳的厚度?为综合的Tb中间的层的nm轧了nanostructures被完成。

简介：Inthethree-wireweldingsystem,aweldingprocessconsistsoftheoperationsoffourdevices,namelythreeweldingmachinesandonebogie.Theoperationsneedtobesynchronizedbyanumericalcoordinatecontroller(NCC).Inthispaper,wewilldiscussatask-job-procedurecubicprogramstructure.Underthisstructure,thedevicesaresynchronizedandisolatedatthesametime.Thiscubicprogramstructurecanalsobeusedasareferenceforothermulti-deviceormulti-unitmanufacturingprocesses.

简介：MoS_2,MoSe_2andWSe_2thinflakeswerefabricatedbythestandardmicromechanicalcleavageprocedures.ThethicknessandtheopticalcontrastoftheatomicthindichalcogenideflakesonSiO_2/Sisubstratesweremeasuredbyatomicforcemicroscopy(AFM)andspectroscopicellipsometer.Arapidandnondestructivemethodbyusingreflectionspectrawasproposedtoidentifythelayernumberof2DlayeredtransitionmetaldichalcogenidesonSiO_2(275nm)/Sisubstrates.Thecontrastspectraof2DnanosheetswithdifferentlayernumbersareinagreementwiththeoreticalcalculationsbasedonFresnel'slaw,indicatingthatthismethodprovidesanunambiguousandnondestructivecontrastspectrafingerprintforidentifyingsingle-andfew-layeredtransitionmetaldichalcogenides.Theresultswillgreatlyhelpinfundamentalresearchandapplication.

简介：TheunstabledimensionaldistortionofLF21aluminumalloyweldmentsatroomtemperatureandafterthermalcycleswasstudiedbyuseoflightinterferenceandCMM.Atthesametime,distortionmechanismwasanalyzedfromtheviewpointofmechanicsandmicrostructure.ExperimentalresultsshowthatthereexistsobviousdifferenceofunstabledimensionaldistortionbetweenLF21weldedspecimensundertwoconditionsmentionedabove.Underroomtemperature,dimensionalvariationofweldedspecimenswilldecreasegraduallyandfinallytendstobestableduring130hafterwelding.Therelativeelongationofweldedspecimenis4.2×10-5.Afterthermalcycles,distortionofweldedspecimenismuchlargerthanthatatroomtemperature.After11thermalcycles,thedimensionwilltendtobestable.Dimensionalunstabledistortionofweldmentsmainlyresultsfromtemperaturecondition,microstructurevariationandrelaxationofweldingresidualstress.

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