简介：Thisstudydevelopedasequentialcouplingfiniteelementproceduretopredictresidualstressesofsteelpipeswithlongitudinalwela\circumferentialweldandspiralweld.Theresultsshowthattheresidualstressinheataffectedzone(HAZ)ishigherthanthatinweldforspiralweldpipe.Forthecircumferentialweldpipeandspiralweldpipe,theresidualstressininnersurfaceishigherthanthatinoutersurface.However,forthespiralweldpipe,theresidualstressininnersurfaceissmallerthanthatinoutersurface.Thehoopresidualstressofcircumferentialweldpipeishigherthanthatoflongitudinalweldpipe,whiletheaxialresidualstressofcircumferentialweldpipeissmallerthanthatoflongitudinalweldpipe.Thehoopstressesforcircumferentialweldpipeandaxialstressforlongitudinalweldpipehaveexceededtheyieldstrengthofbasemetal.Withtheincreaseofhelixangle,thehoopstressdecreaseswhiletheaxialstressincreases.Forthespiralpipe(α=30°to50°),boththehoopstressandaxialstressarerelativelysmall.Thespiralpipe(helixanglerangingfrom30°to50°)ishelpfultoreducestresscorrosioncracking(SCC)anditisrecommendedtomanufacturethesteelpipe.

简介：土地利用规划编制软件α-Planner是针对我国新一轮土地利用总体规划编制需要,面向规划编制机构开展县(市)级、镇级土地利用总体规划编制而开发的专业应用软件。α-Planner采用工程化管理手段,能辅助完成规划编制全过程工作,减轻编制工作量,全面提高规划的科学性和准确性。α-Planner已成功应用于国土资源部土地利用规划修编试点项目。

简介：土地利用规划编制软件α-Planner是针对我国新一轮土地利用总体规划编制需要，面向规划编制机构开展氢（市）级、镇级土地利用总体规划编制而开发的专业应用软件α-Planner采用工程化管理手段，能辅助完成规划编制全过程工作，减轻编制工作量，全面提高规划的科学性和准确性α-Planner已成功应用于国土资源部土地利用规划修编试点项目。

简介：土地利用规划编制软件α-Planner是针对我国新一轮土地利用总体规划编制需要，面向规划编制机构开展县（市）级、镇级土地利用总体规划编制而开发的专业应用软件。α-Planner采用工程化管理手段，能辅助完成规划编制全过程工作，减轻编制工作量，全面提高规划的科学性和准确性。α-Planner已成功应用于国土资源部土地利用规划修编试点项目。

简介：土地利用规划编制软件α-Planner是针对我国新一轮土地利用总体规划编制需要,面向规划编制机构开展县(市)级、镇级土地利用总体规划编制而开发的专业应用软件。α-Planner采用工程化管理手段,能辅助完成规划编制全过程工作,减轻编制工作量,全面提高规划的科学性和准确性。α-Planner已成功应用于国土资源部土地利用规划修编试点项目。

简介：土地利用规划编制软件α-Planner是针对我国新·轮土地利用总体规划编制需要,面向规划编制机构开展县(市)级、镇级土地利用总体规划编制而开发的专业应用软件。α-Planner采用工程化管理手段,能辅助完成规划制全过程工作,减轻编制工作景,全面提高规划的科学性和准确性。α-Planner已成功应用于国土资源部土地利用规划修编试点项目。

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简介：Thegoverningequationsofsurface-deformationinfully-penetratedGTAWweldpoolarederived.ThesolutionschemeoftheLagrangemultiplier,whichmakesthetopsurface-deformationequationbecoupledwiththatforthebottom-surfaceofasingleweldpool,isgivenout.Throughnumericalanalysisofweldpoolsurface-deformationinGTAW,itisfoundthatthereisclearcorrelationbetweenthepenetrationextentandtheLagrangemultiplier,inadditiontotherelationshipbetweenthepenetrationextentandthemaximumdepressionandhumpaswellasthedepressedvolumeofthetopsurfaceofweldpool.Itlaysgoodfoundationfortop-sidesensingbasedweldpenetrationcontrol.

简介：ＷｅｌｄｑｕａｌｉｔｙｃｏｎｔｒｏｌｂｙｎｅｕｒａｌｎｅｔｗｏｒｋＨｕａｎｇＳｈｉｓｈｅｎｇ；ＬｉＤｉａｎｄＳｏｎｇＹｏｎｇｌｕｎ（ＳｏｕｔｈＣｈｉｎａＵｎｉｖｅｒｓｉｔｙｏｆＴｅｃｈｎｏｌｏｇｙ）Ａｂｓｔｒａｃｔ：Ａｒｔｉｆｉｃｉａｌｎｅｕｒａｌｎ...

简介：ThelaserbeamweldingofBT20titaniumalloywasconductedtoinvestigatetheweldshape,microstructuresandproperties.ThefullpenetrationweldcharacteristicsproducedbyCO2laserandbyYAGlaserwerecompared.TheresultsshowthatthefullpenetrationweldofYAGlaserweldingclosesto"X"shape,andweldofCO2laserweldingis"nail-head"shape.Thoseresultfromspecialheatingmodeoflaserdeeppenetrationwelding.ThetensionstrengthofCO2laserandYAGlaserjointsequaltothatofthebasemetal,buttheformerhasbetterductility.Allweldsconsistmainlyoftheacicularαphaseandafewβphaseinmicrostructure.ThedendriticcrystalofCO2laserweldisalittlefinerthanYAGlaserweld.AccordingtheresearchCO2laserisbetterthanYAGlaserforweldingofBT20titaniumalloy.

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简介：Thetransformationinducedplasticity(TRIP)steelseffectoccursbecauseofthemartensitictransformationofretainedausteniteduringplasticdeformation,anditprovidesthesteelwithexcellentstrengthandductility.Whileweldingremainsavitalpartofautobodymanufacturing,theweldabilityofTRIPsteelsisproblematic,andthispreventsitsadoptionformanyapplicationsintheautomotiveindustry.Thispresentworkstudiestheeffectsofweldingandpost-weldheattreatmentonthemicrostructureof...

简介：ＮｏｎｄｅｓｔｒｕｃｔｉｖｅｔｅｓｔｏｆｗｅｌｄｒｅｓｉｄｕａｌｓｔｒｅｓｓｅｓｂｙａｃｏｕｓｔｏｅｌａｓｔｉｃｔｅｃｈｎｉｑｕｅＪｉａｏＦｕｊｉｅ；ＺｈａｎｇＷｅｎｊｕｎａｎｄＹｕａｎＺｈｉｋａｎｇ（ＳｈａｎｇｈａｉＵｎｉｖｅｒｓｉｔｙｏｆＥｎｇｉ...

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简介：Weldpoolcontainssignificantinformationabouttheweldingprocess.TheweldpoolimagesofMAGweldingaredetectedbyLaserStrobesystem.AnalgorithmforextractingweldpooledgeisproposedaccordingtothecharacteristicsofMAGweldpoolimages.Themaximumweldpoollengthandwidtharecalculated.ThemeasurementdatacanbeusedtoverifytheresultsofweldingprocesssimulationandtoprovideagoodfoundationforautomaticcontrolofMAGweldingprocess.

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简介：Itisofgreatimportanceforobtainingtheperfectweldingpropertiestocontroltheacicularferrite(AF)transformationbehaviorreasonablyinsteelweld.AFcontinuoustransformationkineticsintheHSLAsteelweldwascalculatedandmodeledbasedonthedirectgrowthontheinclusionsinertinterface.Thesimulationresultsarecoincidentwiththeexperimentalvaluewell.

简介：VisualimagesensorisdevelopedtodetecttheweldpoolimagesinpulsedMIGwelding.Anexposurecontroller,whichiscomposedofthemodulesofthevoltagetransforming,theexposureparameterspresetting,thecomplexprogrammablelogicdevice(CPLD)basedlogiccontrolling,exposuresignalprocessing,thearcstatedetecting,themechanicalirisdrivingandsoon,isdesignedatfirst.Then,avisualimagesensorconsistsofanordinaryCCDcamera,opticalsystemandexposurecontrollerisestablished.Theexposuresynchroniccontrollogicisdescribedwithvery-high-speedintegratedcircuithardwaredescriptionlanguage(VHDL)andprogrammedwithCPLD,todetectweldpoolimagesatthestageofbasecurrentinpulsedMIGwelding.Finally,bothbeadonplateweldingandVgroovefilledweldingarecarriedout,clearandconsistentweldpoolimagesareacquired.

简介：IntheUrbanBestPracticesAreaoftheExpoShanghaierectsanunusualbuilding,a18-meterhighredbrickhouse,whichisnoneotherthantheGermanHamburgPavilion.ItisnamedPassiveHouse,consideredtobethemostenvironmentallyfriendlyhouse.Thegen-