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  • 简介:Inthispaperwepresentanextensionofthetopologyoptimizationmethodtoincludeuncertaintiesdur-ingthefabricationofmacro,microandnanostructures.Morespecifically,weconsiderdevicesthataremanufacturedusingprocesseswhichmayresultin(uniformly)toothin(eroded)ortoothick(dilated)structurescomparedtotheintendedtopology.ExamplesareMEMSdevicesmanufacturedusingetchingprocesses,nano-devicesmanufacturedusinge-beamlithographyorlasermicro-machiningandmacrostructuresmanufacturedusingmillingprocesses.Inthesuggestedrobusttopologyoptimizationapproach,under-andover-etchingismodelledbyimageprocessing-based'erode'and'dilate'operatorsandtheoptimizationproblemisfor-mulatedasaworstcasedesignproblem.Applicationsofthemethodtothedesignofmacrostructuresforminimumcomplianceandmicrocompliantmechanismsshowthatthemethodprovidesmanufacturingtolerantdesignswithlittledecreaseinperformance.Asapositivesideeffecttherobustdesignformulationalsoeliminatesthelongstandingprob-lemofone-nodeconnectedhingesincompliantmechanismdesignusingtopologyoptimization.

  • 标签: 拓扑优化设计 制造过程 容错 MEMS器件 宏观结构 蚀刻工艺
  • 简介:BasedontheplantleveldatafromtheFirstNationalCensusofBasicUnits,theSecondNationalCensusofBasicUnits,andtheFirstNationalEconomicCensusofChina,thispaperex-aminesthegeographicalagglomerationofChinesemanufacturingindustriesatamoredisaggregatedlevelbothbyindustrialclassi-ficationandspatialunitanalysis.ApplyingtheagglomerationindexproposedbyMaurelandSedillot,studiesshowthatthemostagglomeratedindustriesareresource-intensive,andcapitalandtechnologyintensivewhileindustriesdemandinglocalizedinputsorservinglocalizedmarketsorfavoredbylocalgovernmentsarefairlydispersed.Themoredisaggregatedindustriesaremorespa-tiallyagglomerated.Atthefinerspatialscale,industriesaremoredispersed.Resultsindicatethatwithin-countyspilloversarestrongerthannearby-countyspillovers,andwithin-prefecturespilloversarestrongerthannearbyprefecturespillovers.Local-izedspilloversarestillquitesubstantialatarangebeyondthatofcounties.ComparingtheagglomerationindexofChinesemanu-facturingindustriesin1996,2001and2004,agglomerationseemstobeageneraltendency.Resultsalsoindicatethatsomeindustrieshaveexperiencedremarkablechangesintheirlevelsofagglom-erationintheperiod1996–2004.

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  • 简介:钛和它的合金广泛地比的由于他们的更好的biomechanical和生物化学的相容性为生物医学的应用被使用了另外的金属性的材料象不锈钢和共同基于的合金那样。当在制作生物医学的代替的一本参考书,和它的潜力在这份报纸被讨论,在有高力量和低有弹性的模量的合金被给的类型钛的发展的简短评论,和生产技术生产多孔的钛合金的添加剂的使用分开,用Ti-6Al-4V。

  • 标签: 贝它钛合金 高力量 低有弹性的模量 生产的添加剂 生物医学的申请
  • 简介:NetworkedManufacturingisthetrendevolutionformanufactureenterprisetogaincorecompetenceinthenetworkedeconomyenvironment.Inthispaper,thedefinitionofthestrategicallianceisintroducedanditslifecycleisdescribed.AstheselectionofsuitablepartnersisofvitalimportancetothesuccessforstrategicallianceinNetworkedManufacturingenvironment,alsointhispaper,thedefinition,criteriaandprocessforpartnerselectionareintroduced.Thenthefuzzy-AHP(AnalyticHierarchyProcess)method,asafuzzyextensionofanalytichierarchicalapproachforpartnerselection,isgiven.Intheend,acasestudyisprovided.

  • 标签: 网络制造业 模糊AHP 战略联盟 伙伴选择
  • 简介:由于市场的快速的变化和比赛的压力,生产公司被强迫改编他们的生产方法支持顾客需要的差异和新产品开发的增加。因为生物有机体相当能够适应环境变化和刺激,启发简历的概念被认出了对适应生产合适系统控制。因此,这份报纸建议启发NeuroEndocrine的生产系统(NEIMS)的一个新奇概念。建议NEIMS控制体系结构与neuro控制和荷尔蒙规定原则基于类比。它有能力明确地包括控制点,材料,信息流动路径和逻辑操作指定生产控制计划,并且活泼地在商店地板水平处理意外骚乱的经常的出现。从控制论观点,NEIMS的控制模型由于外部环境在产品要求显示适应行为到变化并且作为内部环境生产房间失灵。最后,一个原型系统被设置了启用NEIMS模拟。

  • 标签: 神经内分泌 制造系统 仿生 新产品开发 控制计划 生产方式
  • 简介:CurrentlymanyenterpriseshaveestablishedsomeindependentapplicationsystemssuchasCAD,CAPP,CAEandsoon.Enterpriseinformationintegrationmakestheseinformationislandsconnected,andtherebyformsauniformenterprise-wideinformationenvironment,Firstthispaperdiscussesthemainresearchcontentsofenterpriseintegration.ThentheauthorintroducesanInternet-basedconfigurableandopeninformationintegrationframework,andpresentsamulti-tierintegrationarchitecturebasedonreusablecomponent,Finallyadevelopmentcaseofenterpriseintegrationframeworkisintroduced.

  • 标签: CIMS 计算机集成制造 企业管理 信息网络 设计数字化 制造数字化
  • 简介:Radiofrequencyidentification(RFID)isacontactlessformofautomaticidentificationanddatacapture(AIDC)technology.ThispaperexplorestheuseofRFIDinthenewfieldofmanufacturingautomationandqualitycontrol.Thispaperconsistsoffiveparts.Thefirstpartgivesabriefbackgroundandintroductionoftechnology.TheproposeduseofRFIDtechnologyinthefieldofmanufacturingautomationandqualitycontrolisdiscussedinsecondpart.Thethirdpartcoversitsuseinthefieldofwarehousemanagementsystem.PartfourisalocalreviewandanalysisofRFIDtechnologyinmanufacturingandwarehousingwhichwouldsupportthepotentialuseofthistechnologylocallyatChina.ThelastpartofpapergivesconcludingremarksabouttheRFIDtechnologywithrecommendationsofRFIDuseintheseareas.

  • 标签: RFID EPC MANUFACTURING AUTOMATION warehousing AIDC
  • 简介:Greenandintelligentmanufacturingwillbethedevelopmentdirectionofmanufacturingindustrybecauseoftheirfeatures:lowpollutionontheenvironment,highefficiencyandautomaticproduction.Therapiddevelopmentofinternetischangingthedirectionofthemanufacturingindustry,whichwillimpactthegreenandintelligentmanufacturing.Basedonthese,theenvironmentandconditionsofgreenandintelligentmanufacturingbroughtbyinternetissortedoutinthispaper;andthenewopportunitiesandchallengesofgreenandintelligentmanufacturingintheinterneteraareanalyzed.Then,thepathfortherealizinggreenandintelligentmanufacturingisstudied;andsomepolicyrecommendationsareputforwardtopromotetherealizationofgreenandintelligentmanufacturing.

  • 标签: INTERNET green MANUFACTURING INTELLIGENT manufactu
  • 简介:I.TheargumentinbriefChinabecametheworld'slargestdestinationforforeigndirectinvestment(FDI),almostallofwhichisFDIinmanufacturingandassembly,in2003,beforefallingbackintoasolidsecondplace.TheseFDIflowshaverevolutionizedChina'sindustrialbaseandshiftedthecompositionofChineseexports

  • 标签: 外国直接投资 制造业 中国 跨国公司 改造 技术密集
  • 简介:Onthebasisoftheprincipleofdielesshydrobulgingtechnology,anovelhydrobulgingtechnologyformanufacturinghyperbolicplatesisproposed.First,atoroidalpipeelboworapartialtoroidalpipeelbowisformed,thenthesinglehydrobulgedstructurecanbecutupintosomedesiredplates.Itisprovedbyexperimentsandfiniteelementsimulationthatmanufacturingtechnologyofhyperbolicplatesadoptingintegratedhydrobulgingformingtechnologyisfeasible.

  • 标签: HYPERBOLIC PLATES integrally hydrobulging TOROIDAL PIPE
  • 简介:生产网络流动(MNF)是在为更多的复杂生产情形建模克服平常的网络流动的限制的一个概括网络模型,特别地进一个产品或提取材料的一种类型进许多不同产品的不同材料的合成。不过一个网络为解决MNF的一个简化版本的单一的方法在文学被构画出,更多的研究工作仍然被需要给一个完全的答案某古典两重性和optimality是否古典网络流动问题结果,能在MNF被扩大。在这篇论文,我们为获得一个起始的基本可行答案开始存在建议一个算法的方法联网单一的算法,并且介绍一条基于网络的途径给检查双可行性条件。这些结果是平常的网络流动问题的那些的扩展。

  • 标签: 最小值 成本流程 生产费用 网络