Title:RMachineLearningEssentialsAuthor:MicheleUsuelliLength:218pagesEdition:1Language:EnglishPublisher:PacktPublishingPublicationDate:2014-11-25ISBN-10:178398774XISBN-13:9781783987740GainquickaccesstothemachinelearningconceptsandpracticalapplicationsusingtheRdevelopmentenvironmentAboutThisBookBuildmachinelearningalgorithmsusingthemostpowerfultoolsinRIdentifybusinessproblemsandsolvethembydevelopingeffectivesolutionsHands-ontutorialexplainingtheconceptsthroughlotsofpracticalexamples,tipsandtricksWhoThisBookIsForIfyouwanttolearnhowtodevelopeffectivemachinelearningsolutionstoyourbusinessproblemsinR,thisbookisforyou.Itwouldbehelpfultohaveabitoffamiliaritywithbasicobject-orientedprogrammingconcepts,butnopriorexperienceisrequired.InDetailRMachineLearningEssentialsprovidesyouwithanintroductiontomachinelearningwithR.Machinelearningfindsitsapplicationsinspeechrecognition,search-basedoperations,andartificialintelligence,amongotherthings.Youwillstartoffbygettinganintroductiontowhatmachinelearningis,alongwithsomeexamplestodemonstratetheimportanceinunderstandingthebasicideasofmachinelearning.ThisbookwillthenintroduceyoutoRandyouwillseethatitisaninfluentialprogramminglanguagethataidseffectivemachinelearning.Youwilllearnthethreestepstobuildaneffectivemachinelearningsolution,whichareexploringthedata,buildingthesolution,andvalidatingtheresults.Thebookwilldemonstrateeachstep,highlightingtheirpurposeandexplainingtechniquesrelatedtothem.Bytheendofthisbook,youwillbeabletousethemachinelearningtechniqueseffectively,identifybusinessproblems,andsolvethembyapplyingappropriatesolutions.TableofContentsChapter1.TransformingDataintoActionsChapter2.R–APowerfulToolforDevelopingMachineLearningAlgorith

在线考试系统文献综述中文摘要：随着网络技术的日益成熟，网络已经深入到生活的每一个角落，包括教育、购物、咨询、办公等等许多领域。
在网络迅速发展的今天，网页技术的应用也越来越广泛。
网页技术的应用对于教育行业来说优势更加的明显。
教育行业可以通过网络进行学生和教职工的管理、组织学生在线考试、在网站上发布学校相关信息等活动。
这样不仅能增加学校管理的透明度，还提高了学校的管理水平。
在线考试还能充分的利用学校的现有资源，大大减轻教师的工作量，把老师从出卷、阅卷等一些繁重中做中解脱出来。
本文重点论述了由于网络的存在扩大了学校的服务范围，为学校的管理提供了更多的条件。
对此做出了详细的调查，可行性研究和分析。
系统采用了B/S结构，在网络上建立学校自己的教育网站。
系统开发经历了系统分析、系统设计和系统实施三个阶段。
从设计方案的提出，经过详细的调查，分析了方案的可行性和必要性，通过详细的系统设计，力图提高系统的集成性和快捷性；
并在系统实施阶段收集了大量的实验数据，以便测试阶段系统的准确性和稳定性。
系统整体是基于浏览器/服务器，前台应用JSP技术，后台采用SQLServer2000作为数据库与前台连接。
关键词：网络教育在线考试B/S结构JSP技术 AbstractWiththeincreasinglysophisticatednetworktechnologies,thenetworkhadpenetratedeverycorneroflife,includingeducation,shopping,advice,officeandsomanyfields.Today,therapiddevelopmentofthenetwork,theapplicationofwebtechnologymoreandmorewidely.Webtechnologyadvantagefortheeducationindustryismoreevident.Educationsectorthroughanetworkofstudentsandfacultymanagement,studentorganizations,onlineexaminations,inthewebsiteinformationandotherschoolactivities.Thiscannotonlyincreasethetransparencyofschoolmanagement,butalsotoimprovetheschoolmanagementlevel.Onlinetestcanfullyutilizetheschool'sexistingresources,greatlyreducingtheworkloadofteachers,theteacherfromthevolumeofgradingtodoandsomeheavyfreed.Thisarticlefocusesontheexistenceofasnetworkservicestoexpandthescopeoftheschool,theschoolmanagementtoprovidemoreconditions.Havemadeadetailedsurvey,feasibilitystudiesandanalysis.SystemusestheB/Sstructureofthenetworktoestablishtheirownschools,educationalwebsites.Systemdevelopmentthroughsystemanalysis,systemdesignandsystemimplementationofthethreestages.Fromthedesignoftheproposal,afteradetailedinvestigationofthefeasibilityandnecessity,throughdetaileddesign,tryingtoimprovesystemintegrationandspeed;andimplementationphaseinthesystem,alargenumberofexpe

深度学习(DeepLearning)是机器学习(MachineLearning)中近年来备受重视的一支，深度学习根源于类神经网络(ArtificialNeuralNetwork)模型，但今日深度学习的技术和它的前身已截然不同，目前最好的语音识别和影像辨识系统都是以深度学习技术来完成，你可能在很多不同的场合听过各种用深度学习做出的惊人应用(例如：最近红遍大街小巷的AlphaGo)，听完以后觉得心痒痒的，想要赶快使用这项强大的技术，却不知要从何下手学习，可以学习一下这个资料。
可以毫不犹豫的说，这个资料是我看过最系统，也最通俗易懂的关于深度学习的文章。
它是由台大教授李宏毅讲解一天搞懂深度学习讲课的PPT，PPT主要包含四部分：什么是深度学习、深度学习的各种小技巧、有记忆力的深度学习模型、深度学习的应用和展望。
OutlineLectureI:IntroductionofDeepLearningLecturell:TipsforTrainingDeepNeuralNetworkLecturelll:ariantsofneuralNetworkLecturev:NextWaveLectureIntroductionofDeeplearningOutlineoflecturentroductionofDeepLearningLet'sstartwithgeneralmachinelearningWhyDeep"HelloWorldforDeepLearningMachineLearningLookingforafunctionSpeechrecognitionHowareyouImagerecognition=“Cat"Playinggo5-5″(nextmoveDialogueSystemHello(whattheusersaid)(systemresponseImageRecognition:FrameworkcatAsetofModefunctioncat)=“money"dosnakeImageRecognition:FrameworkcatAsetofModelf(41)="cat"f(=“moneyfunctionBetter)=“dog"f2(nakeGoodnessoffunctionfSupervisedLearningTrainingDatamonkey”“cat"“dogImageRecognition:FrameworkcatModelTrainingTestinAsetofunctioncatStepGoodnessofPickthe"Best"FunctionUsingfunctionfStepStep3TrainingDatamonkey”“cat"“dogThreestepsfordeeplearningStepStepStep3:pickdefineasetgoodnessofthebestoffunctionfunctionfunctionDeepLearningissosimple3DCTENCENTCO

DifferentialEquationsandLinearAlgebra(4th)英文无水印原版pdf第4版pdf所有页面使用FoxitReader、PDF-XChangeViewer、SumatraPDF和Firefox测试都可以打开本资源转载自网络，如有侵权，请联系上传者或csdn删除查看此书详细信息请在美国亚马逊官网搜索此书EditorialDirector,Mathematics:ChristinehoagEditor-in-Chief:DeirdreLynchAcquisitionsEditor:WilliamHoffmaProjectTeamLead:ChristinaleProjectmanager:LaurenMorseEditorialAssistant:JenniferSnyderProgramTeamLead:KarenwernholmProgramManagerDaniellesimbajonCoverandillustrationDesign:StudioMontageProgramDesignLead:BethPaquinProductMarketingManagerClaireKozarProductMarketingCoordiator:BrookesmithFieldMarketingManager:EvanStCyrSeniorAuthorSupport/TechnologySpecialist:JoevetereSeniorProcurementSpecialist:CarolMelvilleInteriorDesign,ProductionManagement,AnswerArt,andCompositioneNergizerAptara,LtdCoverImage:LighttrailsonmodernbuildingbackgroundinShanghai,China-hxdyl/123RFCopyrightO2017,2011,2005PearsonEducation,Inc.oritsaffiliates.AllRightsReserved.PrintedintheUnitedStatesofAmerica.Thispublicationisprotectedbycopyright,andpermissionshouldbeobtainedfromthepublisherpriortoanyprohibitedreproduction,storageinaretrievalsystem,ortransmissioninanyformorbyanymeans,electronic,mechanical,photocopyingrecording,orotherwise.Forinformationregardingpermissions,requestformsandtheappropriatecontactswithinthePearsonEducationGlobalRights&Permissionsdepartmentpleasevisitwww.pearsoned.com/permissions/PEARSONandALWAYSLEARNINGareexclusivetrademarksintheU.s.and/orothercountriesownedbyPearsonEducation,Inc.oritsaffiliatesUnlessotherwiseindicatedherein,anythird-partytrademarksthatmayappearinthisworkarethepropertyoftheirrespectiveowandanyreferencestothird-partytrademarks,logosorothertradedressarefordemonstrativeordescriptivepurposesonly.SuchofsuchmarksoranyrelationshipbetweentheownerandPearsonEducation,Inc.oritsaffiliates,authors,licenseesordistributortreferencesarenotintendedtoimplyanysponsorship,endorsement,authorization,orpromotionofPearsonsproductsbytheownersLibraryofCongressCataloging-in-PublicationDataGoode.StephenwDifferentialequationsandlinearalgebra/StephenW.GoodeandScottA.AnninCaliforniastateUniversity,Fullerton.-4theditionpagescmIncludesindexISBN978-0-321-96467-0—ISBN0-32196467-51.Differentialequations.2.Algebras,Linear.I.Annin,Scott.II.TitleQA371.G6442015515’.35-dc23201400601512345678910V031-1918171615PEARSONISBN10:0-321-96467-5www.pearsonhighered.comISBN13:978-0-321-96467-0ContentsPrefacevii1First-OrderDifferentialEquations1.1DifferentialEquationsEverywhere11.2BasicIdeasandTerminology131.3TheGeometryofFirst-OrderDifferentialEquations231.4SeparableDifferentialEquations341.5SomeSimplePopulationModels451.6First-OrderLinearDifferentialEquations531.7ModelingProblemsUsingFirst-OrderLinearDifferentialEquations61.8Changeofvariables711.9ExactDifferentialEquations821.10Numericalsolutiontofirst-OrderDifferentialEquations931.11SomeHigher-OrderDifferentialEquations1011.12ChapterReview1062MatricesandSystemsofLinearEquations1142.1Matrices:Definitionsandnotation1152.2MatrixAlgebra1222.3TerminologyforSystemsofLinearEquations13824R。
w-EchelonMatricesandElementaryR。
wOperations1462.5Gaussianelimination1562.6TheInverseofasquarematrix1682.7ElementaryMatricesandtheLUFactorization1792.8TheInvertiblematrixtheoremi1882.9ChapterReview1903Determinants1963.1TheDefinitionofthedeterminant1963.2PropertiesofDeterminants2093.3CofactorExpansions2223.4SummaryofDeterminants2353.5ChapterReview242iyContents4VectorSpaces2464.1Vectorsinrn2484.2DefinitionofaVectorSpace2524.3Subspaces2634.4SpanningSets2744.5LinearDependenceandLinearIndependence2844.6Basesanddimension2984.7Changeofbasis3114.8RowSpaceandColumnSpace3194.9TheRank-NullityTheorem3254.10InvertibleMatrixTheoremll3314.11ChapterReview3325InnerProductSpaces3395.1DefinitionofanInnerproductspace3405.2OrthogonalSetsofvectorsandorthogonalProjections3525.3Thegram-Schmidtprocess3625.4LeastSquaresApproximation3665.5ChapterReview3766LinearTransformations3796.1Definitionofalineartransformation3806.2Transformationsofr23916.3TheKernelandrangeofalineartransformation3976.4AdditionalPropertiesofLinearTransformations4076.5Thematrixofalineartransformation4196.6Chaiterreview4287EigenvaluesandEigenvectors4337.1TheEigenvalue/EigenvectorProblem4347.2GeneralResultsforEigenvaluesandEigenvectors4467.3Diagonalization4547.4AnIntroductiontotheMatrixExponentialFunction4627.5OrthogonalDiagonalizationandQuadraticforms4667.6Jordancanonicalforms4757.7Chapterreview4888LinearDifferentialEquationsofOrdern4938.1GeneralTheoryforLinearDifferentialEquations4958.2ConstantCoefficientHomogeneousLinearDifferentialEquations5058.3ThemethodofundeterminedcoefficientsAnnihilators5158.4Complex-ValuedTrialSolutions5268.5OscillationsofaMechanicalSystem529Contentsv8.6RLCCircuits5428.7TheVariationofparametersmethod5478.8ADifferentialEquationwithNonconstantCoefficients5578.9Reductionoforder5688.10ChapterReview5739SystemsofDifferentialEquations5809.1First-OrderLinearSystems5829.2VectorFormulation5889.3GeneralResultsforfirst-OrderLinearDifferentialystems5939.4VectorDifferentialEquations:NondefectiveCoefficientMatrix5999.5VectorDifferentialEquations:DefectiveCoefficientMatrix6089.6Variation-of-ParametersforLinearSystems6209.7SomeApplicationsofLinearSystemsofDifferentialEquations6259.8MatrixExponentialFunctionandSystemsofDifferentialEquations6359.9ThePhasePlaneforLinearAutonomousSystems6439.10NonlinearSystems6559.11ChapterReview66310TheLaplaceTransformandSomeElementaryApplications67010.1DefinitionoftheLaplaceTransform67010.2TheExistenceofthelaplacetransformandtheInversetransform67610.3PeriodicFunctionsandtheLaplacetransform68210.4ThetransformofderivativesandsolutionofInitial-Valueproblems68510.5TheFirstShiftingTheorem69010.6TheUnitStepFunction69510.7TheSecondShiftingTheorem69910.8ImpulsiveDrivingTerms:TheDiracDeltaFunction70610.9TheConvolutionIntegral71110.10ChapterReview71711SeriesSolutionstoLinearDifferentiaEquations72211.1AReviewofpowerseries72311.2SeriesSolutionsaboutanOrdinaryPoint73111.3TheLegendreEquation74111.4SeriesSolutionsaboutaRegularSingularPoint75011.5Frobeniustheory75911.6Bessel'sEquationofOrderp77311.7Chapterreview785ViContentsAReviewofComplexNumbers791BReviewofPartialFractions797CReviewofIntegrationTechniques804DLinearlyIndependentSolutionstox2y+xp(x)y+g(x)y=0811Answerstoodd-NumberedExercises814Index849S.W.GoodededicatesthisbooktomeganandtobiS.A.annindedicatesthisbooktoarthurandJuliannthebestparentsanyonecouldaskforPretraceLikethefirstthreeeditionsofDifferentialEquationsandLinearalgebra,thisfourtheditionisintendedforasophomorelevelcoursethatcoversmaterialinbothdifferentialequationsandlinearalgebra.Inwritingthistextwehaveendeavoredtodevelopthestudentsappreciationforthepowerofthegeneralvectorspaceframeworkinformulatingandsolvinglinearproblems.Thematerialisaccessibletoscienceandengineeringstu-dentswhohavecompletedthreesemestersofcalculusandwhobringthematurityofthatsuccesswiththemtothiscourseThistextiswrittenaswewouldnaturallyteachblendinganabundanceofexamplesandillustrations,butnotattheexpenseofadeliberateandrigoroustreatment.MostresultsareprovenindetailHowever,manyofthesecanbeskippedinfavorofamoreproblem-solvingorientedapproachdependingonthereader'sobjectives.Somereadersmayliketoincorporatesomeformoftechnology(computeralgebrasystem(CAS)orgraphingcalculator)andthereareseveralinstancesinthetextwherethepoweroftechnologyisillustratedusingtheCasMaple.Furthermore,manyexercisesetshaveproblemsthatrequiresomeformoftechnologyfortheirsolutionTheseproblemsaredesignatedwithaoIndevelopingthefourtheditionwehaveoncemorekeptmaximumflexibilityofthematerialinmind.Insodoing,thetextcaneffectivelyaccommodatethedifferentemphasesthatcanbeplacedinacombineddifferentialequationsandlinearalgebracourse,thevaryingbackgroundsofstudentswhoenrollinthistypeofcourse,andthefactthatdifferentinstitutionshavedifferentcreditvaluesforsuchacourse.Thewholetextcanbecoveredinafivecredit-hourcourse.Forcourseswithalowercredit-hourvalue,someselectivitywillhavetobeexercised.Forexample,much(orall)ofChapterImaybeomittedsincemoststudentswillhaveseenmanyofthesedifferentialequationstopicsinanearliercalculuscourse,andtheremainderofthetextdoesnotdependonthetechniquesintroducedinthischapter.Alternatively,whileoneofthemajorgoalsofthetextistointerweavethematerialondifferentialequationswiththetoolsfromlinearalgebrainasymbioticrelationshipasmuchaspossible,thecorematerialonlinearalgebraisgiveninChapters2-7sothatitispossibletousethisbookforacoursethatfocusessolelyonthelinearalgebrapresentedinthesesixchapters.ThematerialondifferentialequationsiscontainedprimarilyinChapters1and8-1l,andreaderswhohavealreadytakenafirstcourseinlinearalgebracanchoosetoproceeddirectlytothesechaptersThereareothermeansofeliminatingsectionstoreducetheamountofmaterialtobecoveredinacourse.Section2.7containsmaterialthatisnotrequiredelsewhereinthetext,Chapter3canbecondensedtoasinglesection(Section3.4)forreadersneedingonlyacursoryoverviewofdeterminants,andSections4.7,5.4,andthelatersectionsofChapters6and7couldallbereservedforasecondcourseinlinearalgebra.InChapter8Sections8.4,8.8,and8.9canbeomitted,and,dependingonthegoalsofthecourse,Sections8.5and8.6couldeitherbede-emphasizedoromittedcompletelySimilarremarksapplytoSections9.7-9.10.AtCaliforniaStateUniversity,Fullertonwehaveafourcredit-hourcourseforsophomoresthatisbasedaroundthematerialinChapters1-9viiiPrefaceMajorChangesintheFourthEditionSeveralsectionsofthetexthavebeenmodifiedtoimprovetheclarityofthepresentationandtoprovidenewexamplesthatreflectinsightfulillustrationswehaveusedinourowncoursesatCaliforniaStateUniversity,Fullerton.OthersignificantchangeswithinthetextarelistedbeleOW1.ThechapteronvectorspacesinthepreviouseditionhasbeensplitintotwochaptersChapters4and5)inthepresentedition,inordertofocusseparateattentiononvectorspacesandinnerproductspaces.Theshorterlengthofthesetwochaptersisalsointendedtomakeeachofthemlessdaunting2.Thechapteroninnerproductspaces(Chapter5)includesanewsectionprovidinganapplicationoflinearalgebratothesubjectofleastsquaresapproximation3.Thechapteronlineartransformationsinthepreviouseditionhasbeensplitintotwochapters(Chapters6and7)inthepresentedition.Chapter6isfocusedonlineartransformations,whileChapter7placesdirectemphasisonthetheoryofeigenvaluesandeigenvectors.Oncemore,readersshouldfindtheshorterchapterscoveringthesetopicsmoreapproachableandfocused4.Mostexercisesetshavebeenenlargedorrearranged.Over3,000problemsarenowcontainedwithinthetext,andmorethan600concept-orientedtrue/falseitemsarealsoincludedinthetext5.Everychapterofthebookincludesoneormoreoptionalprojectsthatallowformorein-depthstudyandapplicationofthetopicsfoundinthetext6.ThebackofthebooknowincludestheanswertoeveryTrue-FalsereviewitemcontainedinthetextAcknowledgmentsWewouldliketoacknowledgethethoughtfulinputfromthefollowingreviewersofthefourthedition:JameyBassofCityCollegeofSanFrancisco,TamarFriedmannofUniversityofrochester,andlinghaiZhangofLehighUniversityAlloftheircommentswereconsideredcarefullyinthepreparationofthetextS.A.Annin:Ioncemorethankmyparents,ArthurandJuliannAnnin,fortheirloveandencouragementinallofmyprofessionalendeavors.Ialsogratefullyacknowledgethemanystudentswhohavetakenthiscoursewithmeovertheyearsand,insodoinghaveenhancedmyloveforthesetopicsanddeeplyenrichedmycareerasaprofessorFirst-OrderDifferentiaEquations1.1DifferentialEquationsEverywhereadifferentialequationisanyequationthatinvolvesoneormorederivativesofanunknownfunction.Forexample(1.1.1dxds(S-1)(1.1.2)aredifferentialequations.Inthedifferentialequation(1.1.1)theunknownfunctionordependentvariableisy,andxistheindependentvariable;inthedifferentialequation(1.1.2)thedependentandindependentvariablesareSandt,respectively.Differentialequationssuchas(1.1.1)and(1.1.)inwhichtheunknownfunctiondependsonlyonasingleindependentvariablearecalledordinarydifferentialequations.Bycontrast,thedifferentialequationLaplace'sequation)0involvespartialderivativesoftheunknownfunctionu(x,y)oftwoindependentvariablesxandy.SuchdifferentialequationsarecalledpartialdifferentialequationsOnewayinwhichdifferentialequationscanbecharacterizedisbytheorderofthehighestderivativethatoccursinthedifferentialequationThisnumberiscalledtheorderofthedifferentialequation.Thus,(l1.1)hasordertwo,whereas(1.1.2)isafirst-orderdifferentialequation1

Simulationsimplemodelsandcomparisonwithqueueingtheory.AndreiDorokhovThreesimplequeueingmodelsM/M/1,M/G/1andseriesofM/M/1havebeensimulated,andcomparedwithcalculationsbasedonqueueingtheoryforvalidationpurposes.

ThecompleteVisualBehaviourAuthoringframeworkforUnity,empoweringyoutocreateadvancedAIBehavioursandLogic,includingthreeseparate,fullyfeatured,yetseamlesslyinterchangeablemodulesforyoutochooseandeasilyaddinyourgame:•BehaviourTrees•HierarchicalStateMachines•DialogueTreesNodeCanvasisaproductionreadyframeworkusedbymanyawesomegamesincludingKim,Pamela,Hurtworld,ShroudoftheAvatar,KingdomandGhostofaTale.[GamesShowcase]FeatureHighlights-------------------------------------•Choosetherighttoolforthetaskathand.•DesignreactiveBehaviourTreesandHierarchicalStateMachineswithinanintuitive,designerfriendlyvisualnodeeditor:(FullUndo/Redo,ZoomIn/Out,Multi-selection,Duplication,Copy/Pasting,JSONImport/Export,Groups,Commentsandmore)•Uselocal&globalvariablesofanytype,visuallyorincode,forcreatingreusableandactor-oriented,parametricbehaviours,optionallysavingandloadingthosevariablesbetweengamingsessions.•DataBindvariableswithanycomponentpropertyofanytypedirectly.•SyncvariablesautomaticallyoverthenetworkusingUNET,forcreatingmultiplayergames.•VisuallyDebugbehaviourswithrealtime,colorfulandinformativeruntimedebugging.•LiveEditeverythingwhileinplaymodetoperfectlyunderstandyourdesigngoalsandhowtoachievethem.•UtilizeanyexistingcodedirectlywithadvancedandextremelyfastReflectionTasks,automaticallyintegratingUnity'sand3rdPartyassetAPIs.•WorkwithLists/Arrays,Enums,InterfacesandprettymuchANYVariableTypeyouneedout-of-the-box.•Reacttoworldchangesandtransferdatausingthebuilt-inEventSystem.•ReuseandBindmadebehavioursamonganynumberofdifferentagents.•OrganizeyourdesignsusingBehaviourSub-TreesandSub-StateMachines.•ExtendNodeCanvasFrameworktocreateyourownActions,Conditions,Nodesorevencompletelynewmoduleswiththee

Distributedsourcecodingisoneofthekeyenablersforefficientcooperativecommunication.Thepotentialapplicationsrangefromwirelesssensornetworks,ad-hocnetworks,andsurveillancenetworks,torobustlow-complexityvideocoding,stereo/Multiviewvideocoding,HDTV,hyper-spectralandmultispectralimaging,andbiometrics.Thebookisdividedintothreesections:theory,algorithms,andapplications.PartonecoversthebackgroundofinformationtheorywithanemphasisonDSC;parttwodiscussesdesignsofalgorithmicsolutionsforDSCproblems,coveringthethreemostimportantDSCproblems:Slepian-Wolf,Wyner-Ziv,andMTsourcecoding;andpartthreeisdedicatedtoavarietyofpotentialDSCapplications.Keyfeatures:Clearexplanationofdistributedsourcecodingtheoryandalgorithmsincludingbothlosslessandlossydesigns.Richapplicationsofdistributedsourcecoding,whichcoversmultimediacommunicationanddatasecurityapplications.Self-containedcontentforbeginnersfrombasicinformationtheorytopracticalcodeimplementation.Thebookprovidesfundamentalknowledgeforengineersandcomputerscientiststoaccessthetopicofdistributedsourcecoding.Itisalsosuitableforseniorundergraduateandfirstyeargraduatestudentsinelectricalengineering;computerengineering;signalprocessing;image/videoprocessing;andinformationtheoryandcommunications.TableofContentsChapter1:IntroductionPartI:TheoryofDistributedSourceCodingChapter2:LosslessCompressionofCorrelatedSourcesChapter3:Wyner–ZivCodingTheoryChapter4:LossyDistributedSourceCodingPartII:ImplementationChapter5:Slepian–WolfCodeDesignsBasedonChannelCodingChapter6:DistributedArithmeticCodingChapter7:Wyner–ZivCodeDesignPartIII:ApplicationsChapter8:Wyner–ZivVideoCodingChapter9:CorrelationEstimationinDVCChapter10:DSCforSolarImageCompressionChapter11:SecureDistributedImageCodingChapter12:Se

大批两次求和TwoSumII三和ThreeSumclosest四和MedianOfTwoSortedArrays装满水的容器RemoveDuplicatesRemoveDuplicatesIIRemoveElementMoveZeroesNextPermutationSearchInRotatedSortedArraySearchInRotatedSortedArrayIIFindMinimumInRotatedSortedArrayFindMinimumInRotatedSortedArrayIIFindPeakElementSearchRangeInSortedArraySearchInsertPosition组合总和组合求和组合SumIII第一次缺席正缺少号码陷阱雨水J

算法4谢路云源码之ThreeSumFast，快速计算三数之和，供大家参考使用，

IT项目管理第六版课本之课后答案，供参考解答。
望君以了解为主TableofcontentsCHAPTERI2CHAPTER24CHAPTER36CHAPTER47CHAPTER5CHAPTER620CHAPTER724chaPteR829ChAPTER9CHAPTER10CHAPTER1137CHAPTER1240APPEnDIXA42APPENDIXB47APPENDIXCListofsolutionfilesavailableandreferencedinthisdocument,inalphabeticalorderName▲SizeTypeEnseExA-2289KBMicrosoftofficeProjectDocument5BEXA-3270KBMicrosoftOfficeProjectDocument22J5eExA-4337KBMicrosoftOfficeProjectDocument国appC1313KBMicrosoftofficeExcelWorksheet图ex4216KBMicrosoftofficeExcel97-2003Worksheet图ex-323KBMicrosoftOfficeExcel97-2003Worksheet4KbMicrosoftOfficeExcel97-2003Worksheet国x4525KBMicrosoftOfficeExcel97-2003Worksheete×5-221KBMicrosoftOfficePowerPoint97-2003PresentationElex5-3123KBMicrosoftOfficeProjectDocument152KBMicrosoftOfficeProjectDocument已区区ex7-519KBMicrosoftOfficeExcel97-2003Worksheet17KBMicrosoftofficeExcel97-2003Worksheet20KBMicrosoftOFficeExcel97-2003Worksheet16KBMicrosoftofficeExcel97-2003Worksheet16KBMicrosoftofficeExcel97-2003Worksheet16KBMicrosoftofficeExcel97-2003Worksheel17KBMicrosoftofficeExcel97-2003Worksheetrung17KBMicrosoftofficeExcel97-2003WorksheetEfrun5-4123KBMicrosoftOfficeProjectDocument131KbMicrosoftOFficeProjectDocumentE179KBMicrosoftofficeProjectDocument21KBMicrosoftofficeExcel97-2003Worksheet国run7-221KBMicrosoftofficeExcel97-2003Worksheet17KBMicrosoftofficeExcel97-2003Worksheet国run114KBMicrosoftOfficeExcel97-2003Worksheet图run917KBMicrosoftofficeExcel97-2003Worksheet图run11115KBMicrosoftofficeExcel97-2003Worksheet图run12215KBMicrosoftOfficeExcel97-2003Worksheetes1video1-215KBMicrosoftofficeExcel97-2003Worksheet图vdeo1317KBMicrosoftofficeExcel97-2003Worksheet图wde2-3141KBMicrosoftOfficeProjectDocument155KBMicrosoftOfficeProjectDocumentesvideo4-22KBMicrosoftofficeExcel97-2003Worksheet四vde04220KBMicrosoftoFficeExcel97-2003Worksheet图vde5-317KBMicrosoftofficeExcel97-2003WorksheetEshlvideo6-114KBMicrosoftOfficeExcel97-2003Worksheet到vde6218KBMicrosoftofficeExcel97-2003WorksheetInformationTechnologyProjectManagement,SixthEdition学霸助手[xuebazhushou.com-课后答案期末试卷|复习提纲CHAPTER1IntroductiontoProjectManagementDISCUSSIONOUESTTONS1.Whyisthereaneworrenewedinterestinthefieldofprojectmanagement?Moreandmoreprojectsarebeingdonebyavarietyoforganizations.Theprojectsaremorecomplexandofteninvolvetheuseofnewtechnologies.Organizationsarestrugglingtofindbetterwaystomanagetheirprojects.2.Whatisaproject,andwhatareitsmainattributes?Howisaprojectdifferentfromwhatmostpeopledointheirday-Lo-dayjobs?Whatisthetripleconstraint?aprojectis"atemporaryendeavorundertakentocreateauniqueproduct,service,orresult"(PMBOKGuide,2008,p.5).Inadditiontobeingtemporaryandunique,otherattributesofprojectsarethattheyaredevelopedusingprogressiveelaboration,requireresourcesfromvariousareas,shouldhaveaprimarycustomerorsponsor,andinvolveuncertainty.Projectsaredifferentfromday-to-dayactivitiesprimarilybecausetheyhavefocusedgoalsanddefinitebeginningandendingdates.Thetripleconstraintismanagingscope,time,andcostgoals3.Whatisprojectmanagement?Brieflydescribetheprojectmanagementframework,providingexamplesofstakeholders,knowledgeareas,toolsandtechniques,andprojectsuccessfactorsProjectmanagermentis"theapplicationofknowledge,skills,tools,andtechniquesloprojectactivitiesinorderLomeetprojectrequirements"(PMBOKGuide,2008,p9).Theprojectmanagementframeworkgraphicallyshowstheprocessofbeginningwithstakeholdersneedsandexpectations,applyingthenineprojectmanagementknowledgeareasandvarioustoolsandtechniquestoleadtoprojectsuccessandthenenterprisesuccess.Forexample,ifaprojectweretoimplementanERPsystemforalargecompany,thestakeholderswouldincludemanagersandusersfrommanydifferentdepartments(finance,manufacturing,humanresourcesIT,etc.)allnineknowledgeareaswouldbeimportant,numeroustoolsandtechniqueswouldbeapplied(seeTable1-1),andprojectsuccessmightbebasedonimplementkeyfunctionsbyacertaintimeforacertaincostorhavingthenewsystempayforitselfwithinacertaintimeperiod4.Whatisaprogram?Whatisaprojectportfolio?Discusstherelationshipbetweenprojects,programs,andportfoliomanagementandthecontributionstheyeachmaketoenterprisesuccessaprogramis"agroupofprojectsmanagedinacoordinatedwaytoobtainbenefitsandcontrolnotavailablefrommanagingthemindividually(PmbokGuide,2008,p9)Projectportfoliomanagementfocusesonmanagingprojectsasisasaportfolioofinvestmentsthatcontributetotheentireenterprisessuccess.Projectsarepartofprogramswhicharepartofportfolios5.Whatistheroleoftheprojectmanager?Whataresuggestedskillsforallprojectmanagersandforinformationtechnologyprojectmanagers?Whyisleadershipsoimportantforprojectmanagers?Howisthejobmarketforinformationtechnologyprojectmanagers?Theprojectmanagerisultimatelyresponsibleforprojectsuccess.Manysuggestedskillsarelistedinthischapter,includingstrongleadershipskills,organizationalskills,technicalskills,andmanysofskills.ITprojectmanagersrequirethesameskillsasgeneralprojectmanagers,buttheyshouldalsoknowsomethingaboutthetechnologyusedfortheprojectandthetypesofpeoplewhoworkoninformationtechnologyprojectsLeadingbyexampleisthemostimportanttraitofeffectiveprojectmanagers.Thejobmarketforinformationogyprojectmanagerscontinuestoremainstrong,especiallyforthosewithstrongbusinessandleadershipskills6.Brieflydescribesomekeyeventsinthehistoryofprojectmanagement.WhatroledoestheProjectManagementInstituteandotherprofessionalsocietiesplayinhelpingtheprofessionSomepeoplesaythatbuildingtheegyptianpyramidsorthegreatwallofChinawereprojects,butmodernprojectmanagementbeganwiththeManhattanProjectordevelopmentoftheatomicbomb.Thatprojecttookaboutthreeyearsandcostalmosts2billionin1946andhadaseparateprojectmanagerandtechnicalmanagerGanttchartswerefirstusedin1917,andnetworkdiagramswereusedin1958.PMiisthemainprofessionalsocietyforprojectmanagers,andtheyrunthePMPcertificationprogramInformationTechnologyProjectManagement,SixthEdition学霸助手[xuebazhushou.com-课后答案期末试卷|复习提纲7.Whatfunctioncanyouperformwithprojectmanagementsoftware?Whataresomepopularnamesoflowend,midrange,andhigh-endprojectmanagementtools?Projectmanagenentsoftwarecanassistindevelopingschedules,communicatinginformation,trackinprogress,etc.PopulartoolsincludemilestonesSimplicity,Project2007,andthemicrosoftEnterpriseProjectManagementsolutiontonameafewEXERCISESAnswerstoalloftheseexerciseswillvary.Themainpurposeoftheseexercisesistohavestudentsbegindoingsomeindependentresearchtofurtherexplorethefieldofprojectmanagement.Youcouldhavestudentsdiscusstheresultsoftheseexercisesinclasstoenhanceparticipation,assignsomeforhomework,ordobothInformationTechnologyProjectManagement,SixthEdition学霸助手[xuebazhushou.com-课后答案期末试卷|复习提纲CHAPTER2TheprojectmanagementandlnformationtechnologycontextDISCUSSIONOUESTIONS1.Whatdoesitmeantotakeasystemsviewofaproject?Howdoestakingasystemsviewofaprojectapplytoprojectmanagement?Takingasystemsviewmeanslookingatthebigpictureofhowaparticularprojectfitsintotherestoftheorganization.Itisimportantforprojectmanagerstounderstandthebroaderorganizationalenvironmenttoensuretheirprojectsmeetorganizationalneeds2.Explainthefourframesoforganizations.Howcantheyhelpprojectmanagersunderstandtheorganizationalcontextfortheirprojects?ThefourframesoforganizationsaresummarizedbelowStructural:dealwithhowtheorganizationisstructuresandfocusonrolesandresponsibilities.ItsimportanttounderstandtheserolesandresponsibilitieswhendealingwithprojectstakeholdersespeciallyinprocuringresourcesHumanresources:focusesonmeetingtheneedsoftheorganizationanditspeople.ProjectmanagersmustunderstandvarioushumanresourcespoliciesandproceduresPolitical:addressesorganizationalandpersonalpolitics.Manyprojectmanagersfailbecausetheydonotunderstandthepoliticalenvironment.Symbolic:focusesonsymbolsandmeanings.It'simportanttounderstandanorganizationsculturedresscode,workethic,andsooninmanagingprojects3.Brieflyexplainthediferencesbetweenfunctional,matrix,andprojeclorganizations.DescribehoweachstructureaffectsthemanagementoftheprojectFunctionalorganizationshavemanagersorvicepresidentsinspecialtiessuchasengineering,manufacturing,informationtechnology,andsoon.Theirstaffshavespecializedskillsintheirrespectivedisciplines.ProjectorganizationshaveprojectmanagersinsteadoffunctionalmanagersreportingtotheCEO.matrixorganizationsrepresentthemiddlegroundbetweenfunctionalandprojectstructures.Personneloftenreporttobothafunctionalmanagerandoneormoreprojectmanagers.Projectmanagershavethemostauthorityinprojectorganizationalstructuresfollowedbymatrix,andthenfunctional4.Describehoworganizationalcultureisrelatedtoprojectmanagement.Whattypeofculturepromotesastrongprojectenvironment?Organizationalcultureisasetofsharedassumptions,values,andbehaviorsthatcharacterizethefunctioningofprojectmanagementandfollowstheguidelinesforapplyingit,itwillbemucheasiertopracticegoodprojedanorganization.Thisculturecandefinitelyimpactprojectmanagement.Forexample,ifanorganizationvaluesmanagement.Projectworkismostsuccessfulinanorganizationalculturewhereemployeesidentifymorewiththeorganization,whereworkactivitiesemphasizegroups,andwherethereisstrongunitintegration,highisktolerance,perfornance-basedrewards,highconflicttolerance,anopenl-systernsfocus,andabalancedfocusonpeople,control,andmeans-orientation5.Discusstheimportanceoftopmanagementcommitmentandthedevelopmentofstandardsforsuccessfulprojectmanagement.ProvideexamplestoillustratetheimportanceoftheseitemsbasedonyourexperienceonanytypeofprojectTopmanagementcommitmentisthenumberonefactorassociatedwiththesuccessofinformationtechnologyprojects,soit'sveryimportanttogetandmaintainthissupport.Topmanagementcanhelpprojectmanagersgetadequateresources,approveuniqueprojectneeds.getcooperationfromotherpartsoftheorganization,andprovidesupportasamentorandcoachtoprojectmanagers.Exampleswillvary6.Whatarethephasesinatraditionalprojectlifecycle?Howdoesaprojectlifecycledifferfromaproductlifecycle?whydoesaprojectmanagerneedtounderstandboth?Atraditionalprojectlifecycleisacollectionofprojectphases-concept,development,implementation,andclose-out.Thesephasesdonotvarybyproject.ProductlifecyclesvarytremendouslybasedonthenatureofInformationTechnologyProjectManagement,SixthEdition学霸助手[xuebazhushou.com-课后答案期末试卷|复习提纲theproject.Forexample,theSystemsDevelopmentLifeCycle(SDLC)couldfollowthewaterfallmodelspiralmodelincrementalreleasemodel,prototypingmodel,orRADmodel.UsingthegeneralphasesoftheSDLC(informationsystemsplanning,analysis,design,implementation,andsupport)therecouldbeaprojecttodevelopastrategicinformationsystemsplan;anotherprojecttocompleteasystemsanalysisforanewsystem;anotherprojecttocreateadetaileddatabasedesign;anothertoinstallnewhardwareorsoftware,andanothertoprovidenewusertraining7.Whatmakesinformationtechnologyprojectsdifferentfromothertypesofprojects?Howshouldprojectmanagersadjusttothesedifferences?itprojectsaredifferentfromothertypesofprojectsbecausetheycanbeverydiverseintermsofsizeandcomplexity,theyoftenincludeleammemberswithverydiversebackgroundsandskills,andhetechnologiesinvolvedarealsoverydiverse.ProjectmanagersshouldadjusttothesedifferencesbypayingcarefulattentiontothegoalsoftheprojectandtheneedsofvariousstakeholdersDefineglobalization,outsourcing,andvirtualteamsanddescribehowthesetrendsarechangingITprojectmanagementGlobalizationhascreateda"flat"worldwhereeveryoneisconnectedandthe"playingfield"islevelformanyingiswhedsand/orsoVirtualteamsoccurwhenagroupofindividualswhoworkacrosstimeandspaceusingcommunicationtechnologies.Eachofthesetrendshasaffectedthewayinwhichprojectworkisdoneandhowprojectsneedtobemanaged.ItisveryrareforaprojectteamtositinthesameworkareaandworkatthesametimeManagementandcoordinationismuchmorecomplicatedEXERCISESAnswerstoalloftheseexerciseswillvaryInformationTechnologyProjectManagement,SixthEdition学霸助手[xuebazhushou.com-课后答案期末试卷|复习提纲chaPTER3TheProjectManagementProcessGroups:ACaseStudyDISCUSSIONQUESTIONS1.Brieflydescribewhathappensineachofthefiveprojectmanagementprocessgroups(initiatingplanningexecuting,monitoringandcontrolling,andclosing).Whattypesofactivitiesaredonebeforeinitiatingproject?Descriptionsofwhathappensineachofthefiveprocessgroupsarelistedbelow:Initiatingincludesactionstocommittobeginorendprojectsandprojeclphases.Somedeliverablesincludedefiningthebusinessneedfortheproject,gettingaprojectsponsor,andselectingaprojectPlanningincludescreatingworkableplansfortheentireproject.EveryknowledgearearequiresdevelopmentofsomeplansExecutinginvolvescoordinatingeveryoneandeverythingtocarryouttheprojectplans.DeliverablesincludetheproductsoftheprojectorphaseMonitoringandcontrollingensurestheprojectobjectivesaremet.DeliverablesincludemonitoringandmeasuringprogressandtakingcorrectiveactionClosinginvolvesbringingtheprojecttoanorderlyend.deliverablesincludeorganizationalprocessassetsupdatesandclosedprocurementsBeforeinitiatingaproject,organizationsoftendeterminehigh-levelscope,time,andcostconstraintsforaproject,identifytheprojectsponsor,selecttheprojectmanager,anddevelopabusinesscasefortheproject,tonameafewApproximatelyhowmuchtimedogoodprojectmanagersspendoneachprocessgroupandwhyAndyCrowe'sresearchfoundthatalphaprojectmanagersspendabout2%oftheirtimeinitialing,21%planning,69%executing,5%monitoringandcontrolling,and3%closingprojects.Themosttimeshouldbespentonexecuting,followedbyplanning3.Whydoorganizationsneedtotailorprojectmanagementconcepts,suchasthosefoundinthePMBOK(RGuidetocreatetheirownmethodologies?Organizationshavedifferentwaysofdoingthings,sotheyoftendeveloptheirownmethodologies4.WhataresomeofthekeyoutputsofeachprocessgroupSeethetablesforeachprocessgroup.Examplesmightincludeacharter,aprojectmanagementplan,deliverables,performancereports,andclosedprocurements5.Whataresomeofthetypicalchallengesprojectteamsfaceduringeachofthefiveprocessgroups?Answerswillvary.Suggestionsmightincludesettingprioritiesduringinitiating,gettingstakeholderinputsduringplanning,meetingscheduledeadlinesduringexecution,collectingtimelydataduringmonitoringandcontrolling,anddefininggoodproceduresduringprojectclosingEXERCIESAnswerstoalloftheseexerciseswillvaryInformationTechnologyProjectManagement,SixthEdition学霸助手[xuebazhushou.com-课后答案期末试卷|复习提纲ChAPTER4ProjectIntegrationmanagementDISCUSSIONQUESTIONS1.Describeprojectintegrationmanagementinyourownwords.Howdoesprojectintegrationmanagementrelatetotheprojectlifecycle,stakeholders,andtheotherprojectmanagementknowledgeareas?Projectintegrationmanagementmeanstyingtogetheralloftheotheraspectsinvolvedinaprojecttomakeitasuccess.Integrationmanagementrelatestotheprojectlifecycleinthatitisdoneinalloftheprojectlifecyclephases.Astheprojectprogresses,integrationmanagementbecomesmorefocused.Integrationmanagementrelatestostakeholdersbecauseitrequirestheprojectmanagertoknowalloftheprojectstakeholders,toknowtheirinterestsandconcernsabouttheproject,andtomanagerelationshipswiththemIntegrationmanagementpullstogetherinformationfromalloftheotherknowledgeareas2.Brieflydescribethestrategicplanningprocess,includingaSWOTanalysis.Whichprojectselectionmethod(s)doyouthinkorganizationsusemostoftenforjustifyinginformationtechnologyprojectsASWOTanalysisinvolvesidentifyingandevaluatinganorganizationsstrengths,weaknesses,opportunitiesandthreats.Aferidentifyingstrategicgoals,thenextstepintheplanningprocessforselectinginformaLiontechnologyprojectsistoperformabusinessareaanalysis.Thisanalysisoutlinesbusinessprocessesthatarecentraltoachievingstrategicgoalsandhelpsdeterminewhichonescouldmostbenefitfrominformationtechnology.Then,thenextstepistostartdefiningpotentialinformationtechnologyprojects,theirscorbenefits,andconstraints.Thelaststepintheplanningprocessforselectinginformationtechnologyprojectsischoosingwhichprojectstodoandassigningresourcesforworkingonthem.Answerswillvaryonthesecondpartofthequestion.Alloftheprojectsectionmethodsareused3.SummarizekeyworkinvolvedineachofthesixprocessesforprojectintegrationmanagementProjectintegrationmanagementincludesthefollowingprocessesDevelopingtheprojectcharterinvolvesworkingwithstakeholderstocreatethedocumentthatformallyauthorizesaproject.Projectcharterscanhavedifferentformats,buttheyshouldincludebasicprojectinformationandsignaturesofkeystakeholders.Developingtheprojectmanagementplaninvolvescoordinatingallplanningeffortstocreateaconsistentcoherentdocument--theprojectmanagementplan.ThemainpurposeofprojectplansistofacilitateactionDirectingandmanagingprojectexecutioninvolvescarryingouttheprojectplansbyperformingtheactivitiesincludedinitProjectplanexecutionshouldrequirethemajorityofaprojectsbudget.Monitoringandcontrollingprojectworkisneededtomeettheperformanceobjectivesoftheproject.TheprojectteamshouldcontinuouslymonitorprojectperformancetoassesstheoverallhealthoftheprojectPerformingintegratedchangecontrolinvolvescoordinatingchangesthataffecttheprojectsdeliverablesandorganizationalprocessassets.changecontrolsystemoftenincludesachangecontrolboard(CCB)configurationmanagement,andaprocessforcommunicatingchangesClosingtheprojectorphaseinvolvesfinalizingallprojectorphaseactivities.Itisimportanttofollowgoodprocedurestoensurethatallprojectactivitiesarecompletedandthattheprojectsponsoracceptsdeliveryofthefinalproducts,services,orresultsoftheproject.4.FitherfromyourownexperienceorbysearchingtheInternet,describeawell-plannedandexecutedproject.Describeadisastrousproject.Whatweresomeofthemaindifferencesbetweentheseprojects?Answerswillvary.Severalexamplesareprovidedinthetext,especiallyintheWhatWentrightandWrongsections5.Discusstheimportanceoffollowingawell-integratedchangecontrolprocessoninformationtechnologyprojects.Whatdoyouthinkofthesuggestionsmadeinthischapter?ThinkofthreeadditionalsuggestionsforintegratedchangecontroloninformationtechnologyprojectsInformationTechnologyProjectManagement,SixthEdition学霸助手[xuebazhushou.com-课后答案期末试卷|复习提纲Answerswillvary.Oneanswermightbethatitisimportanttofollowagoodintegratedchangecontrolprocessoninformationtechnologyprojectstoavoidscopecreepincompatibilityproblems,andtomakeeffectiveuseofresourcesandnewtechnologies.Additionalsuggestionsformanagingintegratedchangeontrolmightincludelocatingkeyprojectstakeholders,assigninguserstoprojectteams,andprovidingteam-basedincentivesforeffectivelymanagingprojectchangesEXERCIES1.Writeaone-totwo-pagepaperbasedontheopeningcase.Answerthefollowingquestionsa.WhatdoyouthinktherealproblemwasinthiscasebDoesthecasepresentarealisticscenario?whyorwhynot?C.WasNickCarsonagoodprojectmanager?Whyorwhynot?d.whatcouldNickhavedonetobeabetterprojectmanager?e.Whatshouldtopmanagementhavedonetohelpnick?SOLUTION:AnswerswillvaryMakesurestudentsjustifytheirresponses.Forexample,theycouldsaythatnickwasagoodprojectmanagerbecausehegotthejobdone.Theycouldsayhewasnotagoodprojectmanagerbecausehewastootechnicalanddidnotgetalongwellwithseniormanagement.(NoteNickistheauthor,syoungerbrother,andeverythingexceptthelastlineofthecaseistotallytrue2.DownloadafreetrialofmindmappingsoftwareandcreateamindmapofaSWOTanalysisforyourorganizationoryourpersonallife.Includeatleasttwostrengths,weaknesses,opportunities,andthreatsandideasforatleastthreepotentialprojectsAnswerswillvary3.Usespreadsheetsoftwaretocreatefigures4-4through4-7inthistext.MakesureyourformulasworkcorrectlySeethefilesprovided4.PerformafinancialanalysisforaprojectusingtheformatprovidedinFigure4-5.Assumetheprojectedcostsandbenefitsforthisprojectarespreadoverfouryearsasfollows:Estimatedcostsare$200,000inyearIand$30,000eachyearinyears2,3,and4.EstimatedbenefitsareSOinyearIand$100,000eachyearinyears2,3,and4.Usea9percentdiscountrateandroundthediscountfactorstotwodecimalplaces.Createaspreadsheet(orusethebusinesscasefinancialstemplateprovidedonthecompanionWebsite)localculateandclearlydisplaythenpv,rol,andyearinwhichpaybackoccurs.Inaddition,writeaparagraphexplainingwhetheryouwouldrecommendinvestinginthisproject,basedonyourfinancialDiscountrat9.00%AssumetheprojectiscompletedinYearo023TotalCosts200,00030,00030.00030000Discountfactor1.000.920.840.77Discountedcosts200,00027,60025,20023,100275,900Benefits0100,000100,000100,000Discountfactor0.920.840.77Discountedbenefits092,00084,00077,000253,000Discountedbenefits-costs200.000644005880053900(22900)NPVCumulativebenefits-costs(20,00(135600)(76,800)(22,900)rolTheNPvandroiarebothnegative,andpaybackdoesnotoccur.Basedonthefinancials,thisprojectisnotagoodinvestment.5.CreateaweightedscoringmodeltodeterminegradesforacourseFinalgradesarebasedonthreeexamsworth20%0,15%,and25%o,respectively,homeworkisworth15%;andagroupprojectisworth25%Enterscoresforthreestudents.AssumeStudent1earns100%(or100)oneveryitem.AssumeStudent2earns70%ooneachoftheexams,80oonthehomework,and95%onthegroupproject.AssumeStudent3earns90%onExam1,80%onExam2,75%onExam3,80%onthehomework,and70%oonthegroupInformationTechnologyProjectManagement,SixthEdition学霸助手[xuebazhushou.com-课后答案期末试卷|复习提纲

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。