简介：Traditionally,SQLquerylanguageisusedtosearchthedataindatabases.However,itisinappropriateforend-users,sinceitiscomplexandhardtolearn.Itistheneedofend-user,searchingindatabaseswithkeywords,likeinwebsearchengines.Thispaperpresentsasurveyofworkonkeywordsearchindatabases.ItalsoincludesabriefintroductiontotheSEEKERsystemwhichhasbeendeveloped.

简介：Ortho_imageswillfullybeintegratedinGIS.Nodoubt,GISforgeneralpurposeisusablewithouttheintegrationofortho_imagesandotherrasterdata.ForsmallGISprojectsitmaybesufficienttostoreinformationassimplefiles.Whendatavolume,however,becomeslargeandthenumberofdatausersbecomesmorethanafew,thedatabasemanagementsystembecomesthemostimportantcomponent.Forinstance,thebasicdesignofGeoStarisbasedontheClient/ServerarchitectureandusinglargeRDBSandOODBStomanagetherasterandvectordatasuchasgraphicdata,attributedata,imagedataandDEMatthesameframework,whichisathoroughandseamlessintegratedsolutionforGISapplications.Thebriefstructureofdatabase,whichisreallyhybridandintegrated,isshowninFig.1.　　Inordertoprovidemoreefficientdataaccessorbrowseforalargearea,thevectordataisorganizedaccordingtotheclassifiedspatialindexbasedonanextendedquadtreecodestoredasclusterrelatedtothefeaturesize,asshowninFig.2.TherasterdatalikeimageandDEMisorganizedinpyramidgrid_dedmanner(Fig.3).EspeciallywearefacingtheproblemofmultiscaledatabaseswithindifferentcoordinatesystemsanddifferentmapprojectionsinChina,themoresophisticateddatabasesintegrationmethodthereforehastobedevelopedtodealwiththesocalled“crossingtheprojectionzone'problem.

简介：TheconfigurationdatabasesareanimportantpartoftheTrigger/DAQsystemofthefutureATLASexperiment.Thispaperdescribestheircurrentstatusgivingdetailsofarchitecture,implementation,testresultsandplansforfuturework.

简介：Asystematic,efficientcompilationmethodforqueryevaluationofDeductiveDatabases(DeDB)isproposedinthispaper.Inordertoeliminateredundancyandtominimizethepotentiallyrelevantfacts,whicharetwokeyissuestotheefficiencyofaDeDB,thecompilationprocessisdecomposedintotwophases.Thefirstisthepre-compilationphase,whichisresponsiblefortheminimizationofthepotentiallyrelevantfacts.Thesecond,whichwerefertoasthegeneralcompilationphase,isresponsiblefortheeliminationofredundancy.Therule/goalgraphdevisedbyJ.D.Ullmanisappropriatelyextendedandusedasauniformformalism.Twogeneralalgorithmscorrespondingtothetwophasesrespectivelyaredescribedintuitivelyandformally.

简介：Aviewinobjectorienteddatabasescorrespondstovirtualschemawithrestructuredgeneralizationanddecompositionhierarchies,Numbersofviewcreationmethodologieshavebeenproposed.Amajordrawbackofexistingmethodologiesisthattheydonotmaintaintheclosureproperty.Thatis,theresultofaquerydoesnothavethesamesemanticsasembodiedintheobjectorienteddatamodel.Teherefore,thispaperpresentsaviewcreationmethodologythatderivesaclassinresponsetoauser'squery,integratesderivedclassinglobalschema(i.e.,considerstheproblemofclassesmovinginclasshierarchy)andselectstherequiredclassesfromglobalschematocreatetheviewforuser'squery.Novelideaofviewcreationincludes:(a)anobjectalgebraforclassderivationandcustomization(wherethederivedclassesintermsofobjectinstancesandprocedure/methodsarestudied),(b)maintenanceofclosureproperty,and(c)classificationalgorithmwhichprovidesmechanismtodealwiththeproblemofaclassmovinginaclasshierarchy.

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简介：Providingefficientaccesstomorethan300TBofexperimentdataistheresponsibilityoftheBaBar^1DatabasesGroup.Unlikegenerictools,TheEventBrowserpresentsuserswithanabstractionoftheBaBardatamodel.MultithreadedCORBA^2serversperformdatabaseoperationsusingsmalltransactionsinanefforttoavoidlockcontentionissuesandprovideadequateresponsetimes.TheGUIclientisimplementedinJavaandcanbeeasilydeployedthroughoutthecommunityintheformofawebapplet.Thebrowserallowsuserstoexaminecollectionsofrelatedphysicseventsandidentifyassociationsbetweenthecollectionsandthephysicalfilesinwhichtheyreside,helpingadministratorsdistributedatatoothersitesworldwide,ThispaperdiscussesthevariousaspectsoftheEventBrowserincludingrequirements,designchallengesandkeyfeaturesofthecurrentimplementation.

简介：Storageandretrievalofmultimediaobjectshasbecomearequirementformanycontemporarysystems．Forexample，givenanimagedatabase，onemaywanttoretrieveallimagesthataresimilartoaqueryimage．Asmanycontent-basedretrievaltechniquesfordigitalimageryuseafeaturevectorapproachtorepresentimagecontents，itisdesirabletoreducethedimensionalityofthedata，whilstmaintainingasmuchofitsoriginalstructure．Severaldimensionalityreductiontechniquesareavailable．ThemostpopularoneisPCA，whichworkswellforstaticdatabases．Inthispaper，wepresentanovelschemeforperformingPCA-baseddimensionalityreductionindynamicdatabases．Insteadofusingtheentiredataset，weonlyrecomputethePCAtransformmatrixontheupdatingdataset．Notethatthesizeoftheupdatingdatasetisusuallymuchsmallerthanthatoftheentiredata，thistechniquemayreducethePCAcomputationtimecomplexitywithoutlosingexactness．Inaddition，theupdatestothedatabasearebasedontheexistingdimensionality-reduceddatavectorsratherthantheoriginalhigh-dimensionaldatavectors，whichmayrelievethesystemoverheadforthemanagementoftheoriginalhigh-dimensionaldata．

简介：LargeHighEnergyandNuclearPhysics(HENP)databasesarecommonlystoredonrobotictapesystemsbecauseofcostconsiderations.Later,selectedsubsetsofthedataarecachedintodiskcachesforanalysisordatamining.Becauseoftherelativelylongtimetomount,seek,andreadatape,itisimportanttominimizethenumberoftimesthatdataiscachedintodisk.Havingtoolittlediskcachewillforcefilestoberemovedfromdiskprematurely,thusreducingthepotentialoftheirsharingwithotherusers.Similarly,havingtoofewtapedriveswillnotmakegooduseofalargediskcache,asthethroughputfromthetapesystemwillformthebottleneck.Balancingthetapeanddiskresourcesisdependentonthepatternsoftherequeststothedata.Inthispaper,wedescribeasimulationthatcharacterizessuchasystemintermsofthersourcesandtherequestpatterns.Welearnfromthesimulationwhichparametersaffecttheperformanceofthesystemthemost.Wealsoobservefromthesimulationthat,thereisapointbeyondwhichitisnotworthinvestinginadditionalresourcesasthebenefitistoomarginal.Wecallthispointthe"point-of-no-benefit"(orPNB),andshowthatusingthisconceptwecanmoreeasilydiscovertherelationshipofvariousparameterstotheperformanceofthesystem.

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简介：Copperandironplayimportantrolesinavarietyofbiologicalprocesses,especiallywhenbeingchelatedwithproteins.Theproteinsinvolvedinthemetalbinding,transportingandmetabolismhavearousedmuchinterest.Tofacilitatethestudyonthistopic,weconstructedtwodatabases(DCCPandDICP)containingtheknowncopper-andiron-chelatingproteins,whicharefreelyavailablefromthewebsitehttp:∥sdbi.sdut.edu.cn/en.Userscanconvenientlysearchandbrowsealloftheentriesinthedatabases.Basedonthetwodatabases,bioinformaticanalyseswereperformed,whichprovidedsomenovelinsightsintometalloproteins.

简介：Dataacquisitionandmodelingarethetwoimportant,difficultandcostfulaspectsinaCybercityproject.2D-GISismatureandcanmanagealotofspatialdata.Thus3D-GISshouldmakethebestofdataandtechnologyof2D-GIS.ConstructionofausefulsyntheticenvironmentrequiresintegrationofmultipletypesofinformationlikeDEM,textureimagesand3Drepresentationofobjectssuchasbuildings.Inthispaper,themethodfor3Dcitylandscapedatamodelandvisualizationbasedonintegrateddatabasesispresented.Sincethedatavolumeofrasterareveryhuge,specialstrategies(forexample,pyramidgriddedmethod)mustbeadoptedinordertomanagerasterdataefficiently.Threedifferentmethodsofdataacquisition,theproperdatastructureandasimplemodelingmethodarepresentedaswell.Atlast,apilotprojectofShanghaiCybercityisillustrated.

简介：Torealizecontent-basedretrievaloflargeimagedatabases,itisrequiredtodevelopanefficientindexandretrievalscheme.ThispaperproposesanindexalgorithmofclusteringcalledCMA,whichsupportsfastretrievaloflargeimagedatabases.CMAtakesadvantagesofk-meansandself-adaptivealgorithms.Itissimpleandworkswithoutanyuserinteractions.Therearetwomainstagesinthisalgorithm.Inthefirststage,itclassifiesimagesinadatabaseintoseveralclusters,andautomaticallygetsthenecessaryparametersforthenextstage-k-meansiteration.TheCMAalgorithmistestedonalargedatabaseofmorethantenthousandimagesandcompareitwithk-meansalgorithm.Experimentalresultsshowthatthisalgorithmiseffectiveinbothprecisionandretrievaltime.

简介：是在由三个主要预报中心在西方的诺思太平洋上形成的热带气旋的数字出现在内部年度、内部十的可变性和期刊变化的特征的比较，i.e.China气象学的管理(CMA)，东京(JMA)的地区性的专业化气象学的中心和关岛的联合台风警告中心(JTWC)，有热带气旋(TC)或台风的下列重要的点(1)气候学(TS的紧张上的TC或更强壮)表演

简介：很多个基于过程的模型为确定被开发了在agro生态系统的碳(C)隐遁。DeNitrification分解(DNDC)模型被用来模仿并且确定长期(1980–2008)玷污器官的碳(SOC)在重要的生产大米的省的动力学，江苏，中国。在SOC存储的变化从在空间分辨率不同的二个土壤数据库被估计：由68个多角形和土壤组成的一个县数据库为在江苏的稻田的所有3.7Mha的701个多角形的基于补丁的数据库。分别地，当那与好决定估计数据库是201.6和216.2时，有粗糙的决定县数据库的模仿的SOC存储在2008在1980和170.3–305.1TgC在131.0–320.6TgC之间变化了在1980和2008的TgC分别地。建模，土壤数据库在空间分辨率不同的结果显示用土壤输入，有更高的分辨率的数据实质地增加了建模的结果的精确性；并且当缺乏详细土壤数据集时，DNDC模型，有最敏感的因素(MSF)的parameterized应付属性无常的方法，尽管，能仍然生产可接受的结果与为在这份报纸报导的案例研究的多达60%的偏差。

简介：AbstractObjectives:Polycystic ovary syndrome (PCOS) is a common endocrine disease in women of childbearing age. Although it is a leading cause of menstrual disorders, infertility, obesity, and other diseases, its molecular mechanism remains unclear. This study aimed to analyze the target genes, pathways, and potential drugs for PCOS through text mining.Methods:First, three different keywords ( "polycystic ovary syndrome", "obesity/adiposis", and "anovulation" ) were uploaded to GenCLiP3 to obtain three different gene sets. We then chose the common genes among these gene sets. Second, we performed gene ontology and signal pathway enrichment analyses of these common genes, followed by protein-protein interaction (PPI) network analysis. Third, the most significant gene module clustered in the protein-protein network was selected to identify potential drugs for PCOS via gene-drug analysis.Results:A total of 4291 genes related to three different keywords were obtained through text mining, 72 common genes were filtered among the three gene sets, and 69 genes participated in PPI network construction, of which 23 genes were clustered in the gene modules. Finally, six of the 23 genes were targeted by 30 existing drugs.Conclusions:The discovery of the six genes (CYP19A1, ESR1, IGF1R, PGR, PTGS2, and VEGFA) and 30 targeted drugs, which are associated with ovarian steroidogenesis (P <0.001), may be used in potential therapeutic strategies for PCOS.

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