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ID:37388137
大小:5.13 MB
页数:125页
时间:2019-05-23
《数据仓库中数据志跟踪的理论与方法研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、国防科学技术大学硕士学位论文数据仓库中数据志跟踪的理论与方法研究姓名:戴超凡申请学位级别:硕士专业:管理科学与工程指导教师:陈文传2002.12.1国防科学技术丈学研究艇院学位论文袖e固瀑随historyofagivenwarehousedataitem,includingthecompletedescriptionofitsaequ醐don,lmnsfom憾tionandintegrationistermedItledatalineage.Data轴ea辨轴醺舾twopaltS"f1)thesetof鞠蛾镣data辆mswhich秭漆c晦produceslhe
2、warehousedataitem;(2)theproeess鹊whichcontributetolhesetofsourcedatailems,滔斟髓,i豫妇datalineageofa鲫warehot髓data.觚istermeddataIineagelraeing.
3、A8oneofthemostadvancedresearchproblemsindatawarehousesyst潮N,data瓤嘲etracingmayp晦anrnportantrole吣areaofin-aeplhdataarlalysig,andhelOUStOvalida钯thesOu
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5、℃扮data,cleaningrulesandlransfotmationrules,8ridthus-nprovingthequal峙ofdatawarehoUSe.Beglnm-o潮蠹嚣持fon'natdefinitionofderivationset,INsthesisfindslhegenerallawsofderivationset·provesthelheOl斜l'lSaboutderivationset,proposesanapproachforweak弧垤《嗡∞andverificationbased011alll'Jbt盎羽鞲pp瓢gtotr
6、acedatalineage,givesaseriesofal'Jlhll3eticfordataIineagetracing,describesthebasicp
7、Ⅸ搿堪搽ofdata酾婶,andthen如玳毽铆懿醐豫鲢th戡瞄豁a嘲approach.FoIlowingistheprimaryworkandeonlributionsofthisthesis.First,lheconceptsaboutdata曲eagetmeingarecx粥npletedandre
8、lned,andlheformaldeftnitionofd剑钿a墩x1setandsuppl
9、ennentaryseta他provided.Thesedefinitionsfollllthebasisforderivationsetlmdng。Atthesametime,theyarethecriterionforverifying孽牯resultoflracing。Then铂醅thesisprovesfive{heorerfl6aboutderivalionset,whichdefinedtherelationshipbetweentransformationandatlributemaooing,derivatj。nsetand蠢酮∞瞧稍a印酗g,d
10、edvationsetandoor虫'it,.,tionset,andlhecorrelalionofsupplementarysetoftransformation.Thesell'leoremsisthebasisandguidelineforeonstme嘲and增蜘thev,瞎ak幽拣脚set鞠∞娴totheinvern'bilityofatl渤utemapo硪j,thusimprovesthebasictheoriesofdatalineagetracing。Next,INsthesispreserr魍adatalineagetracingaf带鳓,W
11、ivem(WeakInversionandVErifK:ationofattributemapping),whichcarlcalculate(attribute-level)derivationsetof醐触mapoI嘴.Then,thisthesisanalj黼髓㈣翻辞oftransformation。andpresentstheformaIdeftnitionofweakirlv6rtibletmnsformalion,andcalculates(tuple-levet》瘦蚺嘲瞧msetof妇璀瀚旺维醢ic撇byone-d弧msionm雕醉玛andmult
12、i-dimensionm
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