112520122No.1SUMNo.125MECHANICALMANAGEMENTANDDEVELOPMENTFeb.2012011P2N3D4R5[1]S12LS123L1S21L33223SL21OD42[2]6030031U463.212A1003-773X201201-0107-021102011-09-11980-107112520122.4[1].D.200545-50.[2].J.20060654-59.AnalysisontheApplicationofCNCPlasmaCuttingTechnologyWANGHui-hui(ShanxiXinfushengMachineManufacturingCo.,ltd,TaiyuAN030013,China)AbstractIntroducethecompositionofCNCplasmacuttingtechnology,theoryanditsdevelopmentandprospects.ThroughtheapplicationofCNCtechnologyinindustrialproduction,thetechnologycutawiderangeofhighaccuracy,lowcostandhighefficiency.Itgraduallyachievesitspurposeofhigh-techcomputernumericalcontrolcutting,withbothcomputer-controlledandplasmaarccharacteristics.Keywordsplasmacutting;CNCtechnology;CNC107TheUseofAutomaticTransmissionGearSwitchTIANZhen-fang(ShanxiVocationalandTechnicalEducation,Taiyuan030031,China)AbstractAselectronictechnologywidelyusedinautomotive,carsequippedwithautomatictransmissiongraduallyenterintoourrangeofoptions,morepeopleusedrivingautomaticcarsmoreand,butfewofthemknowtherationaluseofautomaticcarstalls.Inthispaper,theuseofstallcharacteristics,theproperuseofautomatictransmissiongeararediscussed.Keywordsautomatictransmission;positionswitch;gearcontrolswitch3HOLDD32S2L1D443DS2[1].[M].2007.[2].[M].2002.[4]2[1].[C]//11.200476-84.[2].[M].2002.[3].[M].19841-23.[4].[J].1997(3)32-35.TechniquesAnalysesofSubwayShieldConstructionSUNCheng1,ZHANGChang-ming2(1.ChinaRailwayFirstGroupCo.,Ltd,Xian710043,China;2.ShaanxiUniversityofTechnology,Hanzhong723003,China)AbstractInrecentyears,asconstructionofsubwayconstantly,subwaynetworkgraduallyformed,subwaytunnelunderneaththeexistingmetrolinesinevitableshieldtechnology,inwhichplayedanextremelyimportantrole.Thispaperanalyzedthecauseofshieldtunnelstratadistortionanddisplacementofthemainfactorscausedbydeformationcondition.AdetailedanalysisofconstructiontechnicalmeasuresKyy;y;y108shouldbetaken.ewordssubwatunnelshieldtechnologconstructiontechnolog110