简介：Thispaperfocusesontheissuesofcategoricaldatabasegen-eralizationandemphasizestherolesofsupportingdatamodel,integrateddatamodel,spatialanalysisandsemanticanalysisindatabasegeneralization.Theframeworkcontentsofcategoricaldatabasegeneralizationtransformationaredefined.Thispaperpresentsanin-tegratedspatialsupportingdatastruc-ture,asemanticsupportingmodelandsimilaritymodelforthecategoricalda-tabasegeneralization.Theconceptoftransformationunitisproposedingeneralization.

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简介：TheBaBerexperimentstoresitsdatainanObjectorientedfederateddatabasesuppliedbyObjectivity/DB(tm),thisdatabaseissurrently350TBinsizeandisexpectedtoincreaseconsiderablyastheexperimentmatures.Managementofthisdatabaserequirescarefulplanningandspecializedtoolsinordertomakethedataavailabletophysicistsinanefficientandtimelymanner,WediscusstheoperationalissuesandmanagementtoolsthatweredevelopedduringthepreviousruntodealwiththisvastquantityofdataatSLAC.

简介：ThenewWIODdatabaseallowsforimprovedempiricalanalysisonawiderangeofimportantenvironmentalresearchquestions.InthispaperwedemonstratethescientificpoweroftheWIODdatabaseandanalyzeveryurgentpolicyquestionsontheimpactsofinternationaltradeandstructuralchangeontheenvironment.Weapplyrecenteconometricapproachestoshowtheimpactofinternationaltradeontheenvironmentviaitsdifferentchannelsasforinstancetoincreasewelfareandpotentiallyaffectenvironmentalregulationaswellascountries’sector.Thisapproachhasbecomeknownastheeconometricstructuraldecompositionmethod.Inadditiontotheseguidelinesbytheliterature,aneconometricpaneldataapproachisofferedtoshedsomelightontheimpactofstructuralchangeandinternationaltradeonenvironmentalpressure,whereweespeciallyaddressandsolveseveralendogeneityissuesthataddfurthercomplexitytotheanalysis.

简介：TheBABARdatabase,basedupontheObjectivityOOdatabasemanagementsystem,hasbeeninproductionsinceearly1999,Ithasmetitsinitialdesignrequirementswhichweretoaccommodatea100Hzeventratefromtheexperimentatascaleof200TBperyear.However,withincreasedluminosityandchangesinthephysicsrequirements,theserequirementshaveincreasedsignificantlyforthecurrentrunningperiodandwillagainincreaseinthefuture.NewcapabilitiesintheunderlyingODBMSproduct,inparticularthoseofmultiplefederationandread-onlydatabasesupport,havebeenincorporatedintoanewdesignthatisbackwardscompatiblewithexistingapplicationcodewhileofferingscalingintothemulti-petabytesizeregime.Otheroptimizations,includingtheincreaseduseofthghtlycoupledCORBAserversandanimprovedawarenessofspaceinefficiencies,arealsoplayingapartinmeetingthenewscalingrequirements.Wediscusstheseoptimizationsandtheprospectsforfurtherscalingenhancementstoaddressthelonger-termneedsoftheexperiment.

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简介：Thispaperpresentsthebasicconceptsandprinciples,datastructureandhighefficientspatialindexformulti-resolutionimagedatabase.Thedatabaseischaracterizedbyarrangementofmulti-resourceimagedataandseamlessmosaic,distribution-basedstorageandmanagement,integrationwithotherspatialdatabasesoftwaresuchasGeoStarandGeoGriddevelopedbyWuhanTechnicalUniversityofSurveyingandMapping.

简介：Thermodynamicdatabasesareveryusefultoanalyzethecomplexchemicalreactionshappeninginhightemperaturematerialprocesses.Anaccuratethermodynamicdatabasebasedonphysicallysoundthermodynamicmodelscanprovidethermodynamiccalculationsofusefulphasediagramsandcomprehensivechemicalreactionsrelatedtorefractorycorrosioninsteelmakingprocesses.Inthisstudy,theFactSagethermodynamicdatabase,oneofthemostcomprehensivethermodynamicdatabasesforoxidesystemsamongothercommercialsoftware,isreviewedinparticularforthesteelmakingrefractoryresearch,andseveralapplicationstorefractorycorrosionarepresented.

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简介：Thisresearchtakestheviewthatthemodellingoftemporaldataisafundamentalsteptowardsthesolutionofcapturingsemanticsoftime.Theproblemsinherentinthemodellingoftimearenotuniquetodatabaseprocessing.Therepresentationoftemporalknowledgeandtemporalreasoningarisesinawiderangeofotherdisciplines.Inthispaperanaccountisgivenofatechniqueformodellingthesemanticsoftemporaldataanditsassociatednormalizationmethod.ItdiscussesthetechniquesofprocessingtemporaldatabyemployingaTimeSequence(TS)datamodel.Itshowsanumberofdifferentstrategieswhichareusedtoclassifydifferentdatapropertiesoftemporaldata,anditgoesontodevelopthemodeloftemporaldataandaddressesissuesoftemporaldataapplicationdesignbyintroducingtheconceptoftemporaldatanormalisation.

简介：GeographicalInformationSystem(GIS)iswidelyusedinmanyfields.Withtherapiddevelopmentofcomputernetwork,GISuserscaremoreaboutdatasharinginnetworks.Intraditionalrelationaldatabase,dataconsistencywascontrolledbyconsistencycontrolmechanismwhenadataobjectislockedinasharingmode,othertransactionscanonlyreadit,butcannotupdateit.Thisisappropriateintraditionalrelationaldatabasesthatstoreattributedataandmainlydealwithshorttransactions.Inspatialdatabases,becauseofvastamountofdataandcomplextopologicalrelations,longtransactionaremetfrequently.Ifthetraditionalconsistencycontrolmethodhasbeenusedyet,thesystem'sconcurrencywillbebadlyinfluenced.SotherecomemanynewrequirementsfortheconsistencycontrolinthefieldofGIS.Therearemanyaspectsofdataconsistencyproblemsinspatial　databases,suchastheinconsistencybetweenattributeandgeometrydata;theinconsistencyoftopologicalrelationsaftergeometryobjectshasbeenmodified.Inthispaper,othertwocasesofdataconsistencyarediscussedinMulti_userGeographicalInformationSystem.　　InGIS,therearemanyformsofdata,suchasgeometrydata,attribute,imagedata,andDEMdata.Inthispaper,weonlydiscussspatialgeometrydata.

简介：ThispaperintroducesaheterogeneousdistributeddatabasesystemcalledLSZsystem,whereLSZisanabbreviationofLiShizhen,anancientChinesemedicalscientist.LSZsystemadoptsclusterasdistributeddatabasenode(orsite).Eachclusterconsistsofoneofseveralmicrocomputersandoneserver.Tepaperdescribesitsbasicarchitectureandtheprototypeimplementation,whichincludesqueryprocessingandoptimization,transactionmanageranddatalanguagetranslation.ThesystemprovidesauniformretrieveandupdateuserinterfacethroughglobalrelationaldatalanguageGRDL.

简介：AftertheDatong-Yanggaoearthquake(October1989),aspecialteamwasorganizedforthefirsttimebytheSSBofChinatostarttheworkofearthquakedamageevaluationforthepurposeofprovidingthegovernmentwithascientificbasisfordisasterrelief.Theresultoftheevaluationplayedanimportantroleinspeedinguprehabilitationandreducingdamagelossesintheearthquakearea.BasedontheevaluationofearthquakedamagefromtheDatong-Yanggaoearthquakeandrecentresearchresults,thispaperpresentsamethodforquickevaluationofearthquakedamages,introducessoftwareentitledEDEP(earthquakedamageevaluationprogram)forevaluatingearthquakedamage,andcitesacasetoexplainthemainfunctionandapplicationoftheEDEP.Finally,foraquickerevaluationofearthquakedamages,thepaperalsoproposestheestablishmentofdatabasesystemsofearthquakedamageevaluationintheemphaticallymonitoredareasandwaystobuildupsuchdatabasesystems.

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简介：WepresentaninitialstudyoftheobjectfeaturesofOracle9i-thefirstofthemarket-leadingobject-relationaldatabasesystemsthatsupportsatrueobjectmodelontheserversideaswellasanODMG-styleC++languagebindingontheclientside.WediscusshowthesefeaturescanbeusedtoprovidepersistentobjectstorageintheHEPenvironment.

简介：ThispaperappliestherelevantprinciplesandmethodsofSQLdatabaseandExpertSystem,tryingtoresearchthemethodsandtechniquesofcombiningthemanddesignatemplateofproductionexpertsystemthatisbasedonSQLdatabaseanddrivedbythedatabasesoastosimplifythestructureoftheknowledgebasecarriedbydatabase,generatingthesystemmoreconvenientlyandoperatingitmoreeffectively.

简介：满足为海洋的遥感数据出版的有效管理和网的要求，一台空间数据库引擎，命名MRSSDE，独立地被设计。MRSSDE的逻辑模型，物理模型，和最优化法详细被讨论。比作ArcSDE，它是空间数据库引擎的领先的产品，MRSSDE证明了更有效。