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：Anewintelligentcontrolmetholforweldingpositionerispropsed.ApplyinganimprovedfuzzycontrollerandavariablePIDcontroller,atwo-modeintelligengcontroller(TMICC)isdsignedonbasisoffuzzylogicadnrules.Thesimulationandexperimentalresultsshowthatthiscontrolsystemcanobtainbetterdynamicandstaticcharacteristics.

简介：Aimingattheweldingconditionofspacecomplexseamisuncertainandtheintelligenceofweldingrobotisunideal,atwo-wheeledmobilerobotisdeveloped.Itnotonlyhasthecapacityofautonomousdecisionandavoidingobstacles,butalsocanflexiblymoveandstronglyadaptvariableenvironment.Thecompositionoftheweldingrobotisdescribedandthedynamicmodelisestablished.Thefeasiblecontrolstrategyandcontrolalgorithmisputforward.Thesimulationexperimentsofrealworldareconducted,theresultsaresatisfying.

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简介：ＥｆｆｅｃｔｏｆＴｗｏ－ｔｉｍｅｓＡｎｎｅａｌｉｎｇｏｎＣｈａｒａｃｔｅｒｉｓｔｉｃｓｏｆＴｉＮｉＳｈａｐｃ－ｍｅｍｏｒｙＡｌｌｏｙＺｈａｎｇＪｉｎｂｏ，ＳｕｎＸｕ，ＷａｎｇＦｕｓｈｅｎｇａｎｄＨｅＹｏｎｇｊｉａｎ（张金波（孙序）（王福生）（何勇健）...

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

简介：Inthisstudy,atwo-stepheatingprocessisintroducedfortransientliquidphase(TLP)diffusionbondingforsoundjointswithT91heatresistantsteels.Atfirst,ashort-timehighertemperatureheatingstepisaddressedtomelttheinterlayer,followedbythesecondsteptocompleteisothermalsolidificationatalowtemperature.Themostcriticalfeatureofournewmethodisproducinganon-planarinterfaceattheT91heatresistantsteelsjoint.WeproposeatransitionalliquidphasebondingofT91heatresistantsteelsbythisapproach.Sincejointmicrostructureshavebeenstudied,wetestedthetensilestrengthtoassessjointmechanicalproperty.Theresultindicatesthatthesolidifiedbondmaycontainaprimarysolid-solution,similarcompositiontotheparentmetalandfreefromprecipitates.Jointtensilestrengthofthejointisnotlowerthanparentmaterials.Jointbend'sstrengthsareenhancedduetothehighermetal-to-metaljunctionproducinganon-planarbondlines.Nevertheless,thetraditionaltransientliquidphasediffusionbondingproducesplanarones.Bondingparametersofnewprocessare1260℃for0.5minand1230℃for4min.

简介：Anewtechnology,thetwo-steptransientliquidphasediffusionbonding(TLP-DB)technologyforcobalt-basedK640superalloy,wasinvestigated.Themethodconsistsofashort-timehightemperatureheatingtomeltinterlayerfollowedbyisothermalsolidificationofliquidphaseatalowertemperaturethanthatoftheconventionalTLP-DB.Theresultindicatesthatthetwo-stepTLP-DBcanreliablyproduceanidealjointwithuniformchemicalcomposition,whichissuperiortothejointweldedbyconventionalTLP-DBinmicrostructureandmechanicalproperties.Bondingparametersofnewprocessare1250℃for0.5hand1180℃for3h.Thehigh-temperaturetensilestrengthofthejointbytwo-stepTLP-DBreaches74%ofthatofthebasematerialonanequalbasis,butthehigh-temperaturetensilestrengthofthejointbyconventionalTLP-DBisonly58%ofthatofthebasematerial.

简介：TheanalysisofthemicrostructuralcharacterizationandphasecompositionofelectronbeamweldedjointzonesofTi-43Al-9V-0.3Yalloyhasbeendoneinthisstudy.TheweldedseamismainlycomposedofB2phase,thepartialγ+α2two-phaselamellarstructureandgranularγmphase.AndthelanthanonYexistedasYAl2phaseandservedasgrainrefined.Theimpactofdifferentcoolingratesonjointmicrostructure,fracturecharacteristicandtensilestrengthwereinvestigated.Thehighcoolingraterestrainedthestructuraltransformationandresultedintheorderingstructure.Thefractureofthejointwasbrittlecleavagefracturebecausetheorderingstructurewentagainstrestrainingthecrackpropagation.Withthedecreaseofcoolingrate,thetransformationamountsoflamellarstructureincreased,andthefracturepresentedthelayeredandcross-layeredcharacteristic.

简介：基于镍的复合的层被阳极化在五分钱板上准备在一75?wt%H3PO4答案包含NH4F。这层然后被galvanostatic控告/解除(GCD)对待直到黑外部层被分开，留下象为supercapacitors的没有文件夹的电极材料的镍板上的一部电影。这部电影由Ni组成的微结构描述表演(哦)2和NiO，和没有氟化物在同样获得的电影被发现。电气化学的测试证明这个没有氟化物的电影电极展出954的一个高电容?F圆形的二色性(CD)系列和polyacrylamide胶化电气泳动(页)。当聚合物支架和金属建筑群作为催化活跃中心工作了，BSA服务了。当到BSA的转变金属离子建筑群的有约束力的比率是5:1时，结果证明BSA的结构仍然保持未改变。而且，清除superoxide一？？