简介：美国2003年轿车生产略有下降，但铸件的全部销售量增加了3．6％。连续二年不景气的美国铸造业2003年下半年很多市场开始恢复，因而预测2004年将有更快的恢复。由于铸件的进口量将有更大的增加，因而国内的生产销售不会有更大数量的增长。

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简介：Adigitalarcweldingpowersupplywasdesignedwiththeadvancedreducedinstructionsetcomputermachine(ARM)andembeddedreal-timemulti-taskoperatingsystemmicroC/OS-Ⅱ.TheARM,withitspowerfulcalculatingspeedandcompleteperipheralequipments,isverysuitabletoworkasthecontrollerofthedigitalpowersupply.ThemicroC/OS-ⅡtransplantedinARM,helpstoimprovetherespondentspeedagainstvariousweldingsignals,aswellasthereliabilityofthecontrollingsoftware.Theweldingprocessconsistsofninetasks.Thetasksofgreatsignificanceonreliabilityofthewelder,forexample,theA/Dconversionofcurrentandvoltage,enjoytoppriority.Toavoidsimultaneous-sharingonA/DconverterandLCDmodule,twosemaphoresareintroducedintoensurethesmoothperformanceoftheweldingpowersupply.Provenbyexperiments,theARMandthemicroC/OS-Ⅱcangreatlyimproveboththerespondentspeedandthereliabilityofthedigitalwelder.

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简介：Thedigitalizationofarcweldingpowersourcemainlydependsonthedigitalizationofarcweldinginverter,sothatmaincircuitandcontrollingsystemcangivefullplaytoadvantages.DigitalswitchingcontrolmakesmaincircuitdigitalandDSPand/orMCUmakescontrollingsystem,digital.SoIGBTdrivingcircuit,asatieofmaincircuitandcontrollingsystem,shouldalsobegotdigitalized.Thus,adigitaldrivingcircuitbasedonoptocouplerdeviceHCPL-316Jisprovided.Sometestingexperimentsweredone.Afterdrivingtesting,thedrivingcircuitcertificatesthatdrivingwaveformssatisfytherequirementsofarcweldingpowersourceandthedrivingcircuitisreasonablyandsimplydesigned.Andthedrivingcircuithashighcontrollingprecisionandreliability.No-load-voltagetestingandweldingexternalcharacteristictestingprovethatthedrivingcircuitcanbeappliedinarcweldingpowersource.

简介：ThispaperpresentsanintegratedsimulationmodelforfulldigitalcontrolledPMIG/MAGweldingsystemwithMatlab/Simulink,anditconsistsofpowerinverter,digitalcontrolsystemanddynamicarc-loadmodel.AnintegratedsimulationstudywasdoneforfulldigitalPMIG/MAGwelding,andamethodofconnectingdynamicarc-loadmodeltothesystemwithcontrolledcurrentsourcewaspresented,inaddition,thesimulationresultswereutilizedtostudytheissuesofdigitalcontrolPMIG/MAGweldinginthispaper.Theexperimentalresultsvalidatedthedevelopedsimulationmodel,andthissimulationstudycanbeappliedinimplementationofthefulldigitalPMIG/MAGweldingandanalysisofsystemdynamicprocess.

简介：Adigitalman-machineinteractionsystemcontrolledbycommunicationsbetweentwoprocessorsofTMS320F240andAT98C2051wasresearchedinthepaper.Thesystemiseasytosetandmodifyweldingprocessparametersbykeyboards,anddisplayinformationofweldingsitebyLCD(LiquidCrystalDisplay).Asonepartofmulti-tasksystemaboutTIGweldingmachine,thecoordinationofman-machineinteractionsystemwithothertasksisthemainpointtothestabilityandreliabilityofitsoperation.Experimentsresultindicatesthatthesystemisstable,operation-flexible,highprecision,andanti-interfering.

简介：Adigitalcontrolofpulsedgasmetalarcweldinginverterwasproposed.AcontrolsystemconsistingofanaloguepartswasreplacedwithanewdigitalcontrolimplementedinaTMS320LF2407ADSPchip.Thedesignandconstructionalfeaturesofthewholedigitalcontrolwerepresented.TheresourcesoftheDSPchipwereefficientlyutilizedandthecircuitsareveryconcise,whichcanenhancethestabilityandreliabilityofweldinginverter.Experimentalresultsdemonstratethatthedevelopeddigitalcontrolhastheabilitytoaccomplishtheexcellentpulsedgasmetalarcweldingprocessandthemeritsofthedevelopeddigitalcontrolarestableweldingprocess,littlespatterandperfectweldappearance.

简介：Changesoftheaveragebrightnessandnon-uniformityofdarkoutputimages,andqualityofpicturescapturedundernaturallightingforthecolorCMOSdigitalimagesensorsirradiatedatdifferentelectrondoseshavebeenstudiedincomparisontothosefromtheγ-irradiatedsensors.Fortheelectron-irradiatedsensors,thenon-uniformityincreasesobviouslyandasmallbrightregiononthedarkimageappearsatthedoseof0.4kGy.Theaveragebrightnessincreasesat0.4kGy,increasessharplyat0.5kGy.Thepictureisveryblurryonlyat0.6kGy,showingthesensorundergoessevereperformancedegradation.ElectronradiationdamageismuchmoreseverethanγradiationdamagefortheCMOSimagesensors.Apossibleexplanationispresentedinthispaper.

简介：技术创新，从来没有像现在这样让中国着迷!这是因为，技术落后让中国受尽屈辱!中国未来的发展，中国梦的实现，我们每个人梦想的实现，必须依靠教育创新、人才创新、技术创新、制度创新、思维创新。

简介：前几天，一位作者朋友、职业技术学院的老师在QQ上留言说，学校为提高模具教师的创新水平，要求外出参观或培训模具高速加工与模具新材料技术等方面的内容，并要我们杂志社为他推荐或提供这方面的信息。作为模具杂志编辑，我们深感压力不小，这种压力来自于业界对我们的信任，更来自于我们杂志摇旗呐喊提高中国模具产业技术水平的使命感!

简介：一、Xenos测量机新标杆XENOS，此名字易令人一下子联想到超级英雄。鉴于新的ZEISS坐标测量机的精度和动态特性正在全面步入创新的更高技术领域，超级英雄的形象对XENOS来说是如此恰如其分。ZEISSN量机XENOS的长度测量误差竟达到0．3微米一该精度等级于同类机器中达到了绝无仅有的高度。

简介：透视我国营销现状，不难看出最普遍的营销现象就是功利营销的味道太浓，这致使许多商家营销战术肤浅、跟风营销盛行，这无疑是众多企业营销乏术、创新无门的终极原因。目前，企业所要面对的是更为激烈的国际竞争，所以营销创新成为当前企业营销管理的重要研究课题之一。

简介：2010年1月22日，由国家科学技术部高新技术与产业化司、国家工业和信息化部中小企业司指导，中国制造业信息化杂志社、中国生产力促进中心协会主办，北京市科学技术委员会、国家工业和信息化部中小企业司、国家工业和信息化部科技司、国务院发展研究中心企业所支持的“2010中国制造业信息化新年趋势论坛暨2009MIE创新之星风云榜颁奖盛典”在北京裕龙国际酒店隆重召开。

简介：<正>一直以来,无锡汉神电气有限公司以高科技产品和工业全球化进程为导向,加快发展步伐,转变增长方式,提高运行质量,向更高层次迈进、更

简介：模具产业正朝着信息化、数字化、精细化、高速化和自动化方向发展,模具企业如何进一步提升各方面的综合实力和核心竞争力,创新模具产业发展模式,以模具城形成与特征分析基础上,研究了模具产业集群组织模式和结构关系,通过国内典型特色模具城的剖析,从产业链角度分析模具城的集群创新问题,并对模具城建设与发展提出对策建议.