外文原文-锻造模具设计本体的研究.pdf

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4、neering,KBE15widelyaee即tedao an effeetiveintel ligentdesignmethodologyand designdeeisio nautomatie enabler.K B E15de-finedas ac omputerint铭r ated manufaeturingte chnol眼yto offerfir strankS O lutionf or e呀ineering problem byknowledgedrive and multiply.K BE fusestheteehn ologies ofCA Xand A ltogether,

5、andr en ovat eknowledgebyinheritanee,integrationanaman眼ementofd omain expertknowledgel.Bymea n s of K BE,f orgingdiedesi gneaninsert卯wer ful intel li geneeinto3Dpar a metriedesi gn.But there arefewstandard kn owledgepre s entationsPeeific ations;andd omain eoneePts are alwaysc onfusing.T hesemaketra

6、ditionalK BEsystemshardto addre s sthef o l low ing problems:(1)L aekofunif or mandef feetivewaysto repr esentand min ekn owledge,whieheaus ef orgingdiedesi gnkn owledgehardtobeabstraetedandshared.(2)Laekofpubliedomainc oneeptsdistributionsystem,whiehbr ingmanydif fieultie stowebc ol labor ativeande

7、o operativede si gn.(3)Hardtobeint眼ratedwithother applieationsbeeaus etheirkn ow ledgebases are al ways speeif ied f or speeia l de signpr o blems.ontol笔y the o巧15w ide lyaeeeptedas an effeetivemean sforknowledge share andreus e2一8,whiehdevot estos olvingabovepopularproblemsinAlarea.Butf o玛i鳍diedesi

8、 gn15 rare lyreferredto.T hispaperpresentsanintelligentproduetdesi gnmethodologybasedon ontology.Fir stly thec oneepts ofontol姐yareintrodueed;see-ondlythedomain onto l ogyof forgingdiedesign15diseussed;thirdlythec oneeptualizationdistributiontr ee15built to representf orgingdiedesi gnkn owledge;fina

9、lly,apr ototypesyst em15givenf oril lustration.2BrieflntroduetionofontologyTheAnlerieanheritagedietionarydefines“onto logy,as“thebr a nehofme t aphysic sthatde alswiththena-t ur eofbeing.”Thete rmhasbe e nadoptedbytheAle ommunitytor efertoas etofe one eptsort e rmsthate a nbeus edtode s eribes omea

10、r e aofkn owledgeorbuildar epr e s e ntationofit2.Anontol眼y 15 a voeabu一aryofsu ehterms(n ames ofrelation s,funetions,individua1s),def inedinaf ormthat15b othhumanandmaehinere adable.Anontol昭y,t呀etherw ithakernelsyntax andsemanties,providesthelanguagebywhiehknowledge一basedsystemseaninter oper ateatt

11、heknowledge一level:exehangingass ertions,queriesandanswers.Anontol ogyeanbeveryhigh一level,eonsistingofeoneeptsthatorganizespeeifie,suehasanontologyofvehieles.theupperpartsofaknowledgebase,oriteanbedomain-Gr ubergivesa砂pulardefinition“Ano ntol笔y15an explieit speeifieation ofa eoneeptualization.”仁.Aeo

12、n eeptu alizatio n15 anabstra et,simplifiedviewoftheworldthatwewishtor epresentf orsomepurpose.Every一640一,knowledge一basedsystem,orkn o wledge一levelagent15eo m mittedtos omec oneeptual ization,ex-Plieitlyori mpl ieitly.O ntol眼ies ai mateapturingdo mainkn o wledgein ageneriewayandpr ovide a eor n r no

13、nlyagreedunderstand-ingofadol llain,whiehmaybereus ed。ndsha r eda er o ssapp一ieations。ndgr oups4.ontol o gie spr ovid。a。o m-m onv oe abula理 Jan area and define一withdif ferentle velsoff or mality一themeani眼oftheter m sandthe relationsbetweenthem.(ntol笔ies are usuallyo塔anized intax on o mies andtypieal

14、 lyeontainm odel ing Prim itives suehaselas ses,relations,funetions,axio msandinstanees3.Popula r ap p一 ieatio ns ofontol眼iesine一udekno wledgeman-agement,natur allanguagegeneration,enterprisemo del ing,kno wledge一bas edsystems,ontol雌y一basedbr okers,andinter oPerabilitybetweensyste ms.Pere zete.use5m

15、 odeli眼prim itivestodeseribe an ontol眼y,whiehar eelasses,relations,funetions,ax-iomsandinstanees5.灿dr elations am ong these eoneept seanbe e一assifiedas4types:part一of,kind一or,in-stanee一ofandat tribute一of.Oneethemainc omponentsofontologieshavebeenrepresented,theontologyeanbeimplementedinav ari-ouslang

16、uages:hi gh一y inf or mal,semi一inf or m al,semi一f or malandri即r ouslyfor mallangu眼es6.Fra me,s eman-tiewebandl眼iedeseribela眼u眼e eanbe empl叮edtof or mal ize ontol眼y.T here ar e manyontol笔ies represen-tationmetho dol呛ies,suehasOntolingua,CyeLandb刀nl and()WLete.A ndan exhaustivety因l笔yO fontolo-gies15presented in7,8.Itpr esentsthem ostc o r n m onlyu sedty pes ofo ntologie s:Kn o wledgeRepr ese ntatio n o n-tol笔ies汇,晓ner al浅bn u n on。ntoz眼ies9,九p一Levelonto一ogies,Meta一onto一吧ies,。nds o。n.The r。r。ma nys