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1、《数据库系统原理》实验指导书计算机科学与技术与学院计算机科学与技术系二○一二年勿忘国耻当思国运.抚今追昔,百感化作一念:当苦日子离去的时间越久远,当富日子光临的越急匆,我们心系国家、民族的命运thesamedirectionofrotation90°or180°for;aftereachdiscrotorwhenmeasuringpositionalignmentofthetwohalfcouplingconstant,shouldalsobeintermsofaccuracyandconsistency.Surfacedeviationmeasure
2、ment,mustinevery180degreescorrespondingtothetworadiiareequaltoeachotherinordertoeliminateerrorscausedbymovementoftherotor.Onlyasupportbearingoftherotor,WAcouplings,suchastheuseoftemporaryleavetheCenter,shouldpayattentiontokeeptherotorinthemeasuringprocessinthecenterofthebearingo
3、ilretainingthenestdoesnotchange.Steamoilblock,thereshouldbesufficientclearancebetweentherotorand,inrotorsmakesurerotorisnotontheblockorsealoil.Atthetimeofmeasurement,connectionsarenotallowedbetweentworotors,eachinafreeState.Notallowedincaseofassembledsleeve,Centerworkonthetoothe
4、dcoupling.Couplingtoolshouldhaveadequatestiffness,installationmustbesecureandreliable.CouplingCenterusingadialindicator,thetableshouldbeputinprisonandavoidtouching,toensurecorrectmeasurement.Couplingdiscafteraweektoreturntotheoriginalposition,circumferenceofdialgaugereadingshoul
5、dbeabletogobacktotheoriginalvalue.Whenmeasuringtheclearanceofend,intothefeelerofthegapshouldnotexceedfouratatime,whenthegapistoolarge,youcanusethegasketwiththefeelergaugemeasurementofgaugeblocksorfinishing.bearingsurface,markupshouldbeinaccordancewiththemountingsupportpads,andre
6、testthethickness.Oncetheliftingcylindermeasurementofsurfaceandinternalcylindersurfaceheightdifference,comparedwiththeoriginalvaluesconfirmthelocation.Internalverticalandhorizontalcylinderunderstatekeyinsertioninstallationcomplexmeasuringcylinderinaxialposition.Bottom目录实验一认识DBMS3
7、实验二交互式SQL(4小时)4实验三数据库完整性(2小时)13实验四数据库安全性(2小时)17勿忘国耻当思国运.抚今追昔,百感化作一念:当苦日子离去的时间越久远,当富日子光临的越急匆,我们心系国家、民族的命运thesamedirectionofrotation90°or180°for;aftereachdiscrotorwhenmeasuringpositionalignmentofthetwohalfcouplingconstant,shouldalsobeintermsofaccuracyandconsistency.Surfacedeviatio
8、nmeasurement,mustinevery180degreescorresponding