2023年全國碩士研究生考試考研英語一試題真題（含答案詳解+作文范文）_第1頁
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1、外文翻譯外文翻譯——原文部分原文部分TheNumericalControlEngineBedTransfmsHarveyB.MackeyFirstnumericalcontrolsystemdevelopmentsummarybriefhistytendencyIn1946thefirstelectronicaccountingmachinewasbninthewldthisindicatedthehumanitycreatedhasb

2、eenpossibletostrengthenpartiallytoreplacethementallabthetool.Itwiththehumanitythesewhichintheagriculturetheindustrysocietycreatedonlyisstrengthensthephysicallabthetooltocomparegotupthequantitiveleapenteredtheinfmationsoc

3、ietyfthehumanitytolaythefoundation.After6yearsin1952computertechnologyappliedtotheenginebedthefirstnumericalcontrolenginebedwerebninUS.Fromthistimeonthetraditionalenginebedhashadthearcherytargetchange.Sincenearlyhalfcent

4、urythenumericalcontrolsystemhasexperiencedtwostagessixgenerationofdevelopment.1.1Numericalcontrol(NC)stage(1952~1970)Theearlycomputeroperatingspeedislowwasnotbigtothensciencecomputationthedataprocessinginfluencebutcouldn

5、otadapttheenginebedrealtimecontrolrequest.Thepeoplecannotbutusenumerallogiccircuit“tobuild“tobecomeanenginebedspecialpurposecomputertotakethenumericalcontrolsystemiscalledthehardwareconnectionnumericalcontrol(HARDWIREDNC

6、)JianChengweinumericalcontrol(NC).Alongwiththeprimarydevicedevelopmentthisstagehashadbeenthroughrepeatedlythreegenerationsnamely1952firstgenerationofelectrontube1959secondgenerationoftransist1965thirdgenerationsmallscale

7、integrationelectriccircuit.1.2Computernumericalcontrol(CNC)stage(in1970~present)In1970thegeneralminicomputeralreadyappearedthemassproduction.Thereupontransplantsittakesthenumericalcontrolsystemthecepartfromthistimeonente

8、redthecomputernumericalcontrol(CNC)thestage(“whichshouldhavecomputerinfrontofthegeneral“twoacterstoabbreviate).In1971Americantheacteristicthemenumericalcontrolsserialproductionfactycanstepontothispath.UsesPCmachinetotake

9、atleastitsfrontendmachineprocessesthemanmachinecontactsurfacetheprogrammingtheassociationQuestionsooncrespondenceundertakesthenumericalcontroldutybytheiginalsystem.PCmachinehasthefriendlymanmachinecontactsurfacewillpopul

10、arizetoallnumericalcontrolssystem.Thelongdistancecommunicationthelongdistancediagnosistheservicewillbemecommon.1.3.2approachesthehighaccuracydevelopmentThisisadaptstheenginebedtobehighspeedthehighaccuracydirectionneedtod

11、evelop.1.3.3developstotheintellectualizeddirectionAlongwiththeartificialintelligenceinthecomputerdomainunceasingseepagethedevelopmentthenumericalcontrolsystemintellectualizeddegreeunceasinglywillenhance.(1)appliestheadap

12、tivecontroltechnologyThenumericalcontrolsystemcanexamineintheprocesssomeimptantinfmationtheautomaticcontrolsystemrelatedparameterachievestheimprovementsystemrunningstatusthegoal.(2)introducestheexpertsysteminstructionpro

13、cessingTheskilledwkerexpertsexperiencetheprocessinggeneralrulethespecialrulesteinthesystemtakethecraftparameterdatabaseasthestruttheestablishmenthastheartificialintelligencetheexpertsystem.(3)introducesthebreakdowntodiag

14、nosetheexpertsystem(4)intellectualizednumeralservodriveMaythroughtheautomaticdiagnosisloadbuttheautomaticcontrolparametercausestheactuationsystemtoobtainthebestmovement.Secondenginebednumericalcontroltransfmationnecessit

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