简介:A3D-viewishelpfultoinstantlygraspwhatispresentedinadrawing.Thereexistavarietyofwaystopresentthesamepartwith3D-views.Tofacilitatethechoiceofanoptimumoneamongthem,theworkdividescompositesolidmodelsintothreecategories,soastoconveytheoriginalityofdesignconciselyandaccuratelybyusingtheleast'engineeringlanguage'.
简介:工业和信息化部12月25Et发布《关于向民间资本开放宽带接人市场的通告》(以下简称《通告》),《通告》称,鼓励民间资本以多种模式进入宽带接入市场。一是鼓励民营企业建设宽带接入网业务所需的基础设施.并以自有品牌为用户提供宽带上网服务。二是鼓励民营企业以资本合作、业务代理、网络代维等形式与基础企业开展合作,分享收益。三是鼓励拥有互联网接入服务业务(ISP)经营许可证的民营企业,从基础电信企业租用接入网络资源,以自有品牌为用户提供宽带上网服务。《通告》对基础电信企业和民营企业分别提出了要求,并就第一种开放模式制定发布了《宽带接入网业务开放试点方案》。
简介:WormandwormgeararemodeledunderdevelopmentenvironmentinAutoCADbasedontheprincipleofordinarycylindricalwormdrive.ThedrawingcommandsavailableinAutoCADareusedtodevelopwormblankandcuttermodels.Thesolidmodelsofwormandwormgearareobtainedthroughtheuseofthecommands,move,rotateandsubtract,tosimulatethegeneratingcuttingmovementonthegearcuttingmachine.Autolisplanguageisutilizedinprogrammingforparametricmodelingofwormandwormgear.Thedevelopedprogramcanautomaticallydrawwormandwormgearwhenusersloadthewlwgprogram,inputthemodulusandthenumberofthreads,handedness,andotherparameters.Theoperationissimpleandaccurate,providingpotentialstospeedupproductdesignprocessandimproveefficiency.