DatabaseSystemConcepts——数据库系统概念第六版（英文版）作者：AbrahamSilberschatz(YaleUniversity)HenryF.Korth(LehighUniversity)S.Sudarshan(IndianInstituteofTechnology,Bombay)本书目录：Chapter1Introduction1.1Database-SystemApplications11.2PurposeofDatabaseSystems31.3ViewofData61.4DatabaseLanguages91.5RelationalDatabases121.6DatabaseDesign151.7DataStorageandQuerying201.8TransactionManagement221.9DatabaseArchitecture231.10DataMiningandInformationRetrieval251.11SpecialtyDatabases261.12DatabaseUsersandAdministrators271.13HistoryofDatabaseSystems291.14Summary31Exercises33BibliographicalNotes35Chapter2IntroductiontotheRelationalModel2.1StructureofRelationalDatabases392.2DatabaseSchema422.3Keys452.4SchemaDiagrams462.5RelationalQueryLanguages472.6RelationalOperations482.7Summary52Exercises53BibliographicalNotes55Chapter3IntroductiontoSQL3.1OverviewoftheSQLQueryLanguage573.2SQLDataDefinition583.3BasicStructureofSQLQueries633.4AdditionalBasicOperations743.5SetOperations793.6NullValues833.7AggregateFunctions843.8NestedSubqueries903.9ModificationoftheDatabase983.10Summary104Exercises105BibliographicalNotes112Chapter4IntermediateSQL4.1JoinExpressions1134.2Views1204.3Transactions1274.4IntegrityConstraints1284.5SQLDataTypesandSchemas1364.6Authorization1434.7Summary150Exercises152BibliographicalNotes156Chapter5AdvancedSQL5.1AccessingSQLFromaProgrammingLanguage1575.2FunctionsandProcedures1735.3Triggers1805.4RecursiveQueries1875.5AdvancedAggregationFeatures1925.6OLAP1975.7Summary209Exercises211BibliographicalNotes216Chapter6FormalRelationalQueryLanguages6.1TheRelationalAlgebra2176.2TheTupleRelationalCalculus2396.3TheDomainRelationalCalculus2456.4Summary248Exercises249BibliographicalNotes254Chapter7Datab

ContentsPrefacevTypographicalConventionsxi1Introduction11.1AQuickOverviewofS.......................31.2UsingS...............................51.3AnIntroductorySession......................61.4WhatNext?.............................122DataManipulation132.1Objects...............................132.2Connections.............................202.3DataManipulation.........................272.4TablesandCross-Classification...................373TheSLanguage413.1LanguageLayout..........................413.2MoreonSObjects.........................443.3ArithmeticalExpressions......................473.4CharacterVectorOperations....................513.5FormattingandPrinting.......................543.6CallingConventionsforFunctions.................553.7ModelFormulae...........................563.8ControlStructures..........................583.9ArrayandMatrixOperations....................603.10IntroductiontoClassesandMethods................664Graphics694.1GraphicsDevices..........................714.2BasicPlottingFunctions......................72viiviiiContents4.3EnhancingPlots...........................774.4FineControlofGraphics......................824.5TrellisGraphics...........................895UnivariateStatistics1075.1ProbabilityDistributions......................1075.2GeneratingRandomData......................1105.3DataSummaries...........................1115.4ClassicalUnivariateStatistics....................1155.5RobustSummaries.........................1195.6DensityEstimation.........................1265.7BootstrapandPermutationMethods................1336LinearStatisticalModels1396.1AnAnalysisofCovarianceExample................1396.2ModelFormulaeandModelMatrices...............1446.3RegressionDiagnostics.......................1516.4SafePrediction....................

Createimageprocessing,objectdetectionandfacerecognitionappsbyleveragingthepowerofmachinelearninganddeeplearningwithOpenCV4andQt5KeyFeaturesGainpracticalinsightsintocodeforallprojectscoveredinthisbookUnderstandmoderncomputervisionconceptssuchascharacterrecognition,imageprocessingandmodificationLearntouseagraphicsprocessingunit(GPU)anditsparallelprocessingpowerforfilteringimagesquicklyBookDescriptionOpenCVandQthaveproventobeawinningcombinationfordevelopingcross-platformcomputervisionapplications.Byleveragingtheirpower,youcancreaterobustapplicationswithbothanintuitivegraphicaluserinterface(GUI)andhigh-performancecapabilities.Thisbookwillhelpyoulearnthroughavarietyofreal-worldprojectsonimageprocessing,faceandtextrecognition,objectdetection,andhigh-performancecomputing.You'llbeabletoprogressivelybuildonyour...

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RationalRhapsodyusesgraphicalmodelstogeneratesoftwareapplicationsinvariouslanguagesincludingC,C++,Ada,JavaandC#.

MicrosoftExcel2019PivotTableDataCrunching(BusinessSkills)By作者:BillJelen–MichaelAlexanderISBN-10书号:1509307249ISBN-13书号:9781509307241Edition版本:1出版日期:2019-01-18pages页数:(512)RenownedExcelexpertsBillJelen(MrExcel)andMichaelAlexanderhelpyoucrunchdatafromanysourcewithExcel2019pivottables.UseExcel2019pivottablesandpivotchartstoproducepowerful,dynamicreportsinminutesinsteadofhours,totakecontrolofyourdataandyourbusiness.Evenifyou’venevercreatedapivottablebefore,thisbookwillhelpyouleveragealltheirremarkableflexibilityandanalyticalpower–includingvaluableimprovementsinExcel2019andExcelinOffice365.Drawingonmorethan45combinedyearsofExcelexperience,BillJelenandMichaelAlexanderofferpractical“recipes”forsolvingrealbusinessproblems,helpyouavoidcommonmistakes,andpresenttipsandtricksyou’llfindnowhereelse.Byreadingthisbook,youwill:Mastereasy,powerfulwaystocreate,customize,change,andcontrolpivottablesControlallfuturepivottablesusingnewpivottabledefaultsTransformhugedatasetsintoclearsummaryreportsInstantlyhighlightyourmostprofitablecustomers,products,orregionsUsePowerQuerytoquicklyimport,clean,shape,andanalyzedisparatedatasourcesBuildgeographicalpivottableswith3DMapConstructandsharestate-of-the-artdynamicdashboardsRevampanalysesontheflybydragginganddroppingfieldsBuilddynamicself-servicereportingsystemsShareyourpivottableswithcolleaguesCreatedatamashupsusingthefullPowerPivotcapabilitiesofExcel2019andExcelinOffice365AutomatepivottableswithmacrosandVBASavetimebyadaptingreportswithGetPivotDataDiscovertoday’smostusefulpivottabletipsandshortcuts

ProbabilisticGraphicalModelsPrinciplesandTechniques(Koller)

加州大学伯克利分校的统计系和计算机科学系的教授迈克尔乔丹2003年所写。
是图模型的最新著作，势必成为里程碑式的著作，值得一读。

MathCastisanequationeditor,anapplicationthatallowsyoutoinputmathematicalequations.Theseequationscanbeusedinwrittendocuments,webpages,databases,etc.Theycouldberenderedgraphicallytothescreen,topicturefiles,ortoMathML-today'sleadingstandardlanguagefordescribingmathematics.

压缩感知理论与应用全书，共12章，各章标题如下：1.IntroductiontocompressedsensingMarkA.Davenport,MarcoF.Duarte,YoninaC.EldarandGittaKutyniok;2.Secondgenerationsparsemodeling:structuredandcollaborativesignalanalysisAlexeyCastrodad,IgnacioRamirez,GuillermoSapiro,PabloSprechmannandGuoshenYu;3.Xampling:compressedsensingofanalogsignalsMosheMishaliandYoninaC.Eldar;4.Samplingattherateofinnovation:theoryandapplicationsJoseAntoniaUriguen,YoninaC.Eldar,PierLuigiDragottaandZvikaBen-Haim;5.Introductiontothenon-asymptoticanalysisofrandommatricesRomanVershynin;6.AdaptivesensingforsparserecoveryJarvisHauptandRobertNowak;7.Fundamentalthresholdsincompressedsensing:ahigh-dimensionalgeometryapproachWeiyuXuandBabakHassibi;8.GreedyalgorithmsforcompressedsensingThomasBlumensath,MichaelE.DaviesandGabrielRilling;9.GraphicalmodelsconceptsincompressedsensingAndreaMontanari;10.FindingneedlesincompressedhaystacksRobertCalderbank,SinaJafarpourandJeremyKent;11.DataseparationbysparserepresentationsGittaKutyniok;12.FacerecognitionbysparserepresentationArvindGanesh,AndrewWagner,ZihanZhou,AllenY.Yang,YiMaandJohnWright.

在日常工作中，钉钉打卡成了我生活中不可或缺的一部分。然而，有时候这个看似简单的任务却给我带来了不少烦恼。 每天早晚，我总是得牢记打开钉钉应用，点击"工作台"，再找到"考勤打卡"进行签到。有时候因为工作忙碌，会忘记打卡，导致考勤异常，影响当月的工作评价。而且，由于我使用的是苹果手机，有时候系统更新后，钉钉的某些功能会出现异常，使得打卡变得更加麻烦。 另外，我的家人使用的是安卓手机，他们也经常抱怨钉钉打卡的繁琐。尤其是对于那些不太熟悉手机操作的长辈来说，每次打卡都是一次挑战。他们总是担心自己会操作失误，导致打卡失败。 为了解决这些烦恼，我开始思考是否可以通过编写一个全自动化脚本来实现钉钉打卡。经过一段时间的摸索和学习，我终于成功编写出了一个适用于苹果和安卓系统的钉钉打卡脚本。