外星人入侵这是在移动HTML5游戏开发的前三章中构建的示例游戏。
它根据GPL和MIT许可发布，以实现您的意愿。
可播放的版本：:移动版Bit.ly链接：：如果您对游戏进行了有趣的改进或改进，请告诉我，它将链接到此处。
该原始存储库将保持与本书中的代码匹配。
有关更多资源，请参见：

LY-51S开发板的说明书+电路图+典型程序

branneman/点文件安装：curl-Lbit.ly/branneman-dotfiles-osetup-dotfiles.bashsourcesetup-dotfiles.bash

本软件使用TCP实现类似于QQ的聊天机制重要提醒:客户端由于使用了音频支持所以必须将phonon4.dll与phonon_backend拷贝至exe文件下才可以有消息提示音出现由于时间有限,目前阶段只实现了简单的注册,登陆,聊天,好友管理,系统消息,等功能.总体流程:服务器负责确认登陆,发送用户好友列表,实时更新好友状态,发送系统消息,用户下线,维护用户数据库等功能.并且负责用户消息转发给好友.且都是使用tcp通过服务器进行转发,如此此种设计会造成服务器负担过大.下一阶段需要实现的目标是:1.将消息转发交给客户端使用udp实现,缓解服务器压力在目前的程序设计下客户端已经能够获取peer端的ip,只要指定双方通信的端口号即可实现,基于udp的聊天.2.实现用户与用户之间的文件传输,目前拟定采用tcp通信,确保文件传输的可靠性.///////////////////////版权所有:嘉木工作室,共享软件,仅供参考.2011.9.10bybug_yanginNanjingMail:ly.cpp@qq.comBlogs:http://download.csdn.net/user/linux_ly

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

西电的操作系统课设3（优先级捐赠方法解决优先级翻转问题），含源码（只放了四个需要修改的c和h文件，都是在课设2的基础上做的，课设2和3的代码均备注了修改的起末段落，且使用了不尽相同的备注）。
该做法参考了【LY】的协助手册，我在实验方案中给了相当详细的说明。
代码结合说明来做的话，理解这题应该没什么问题。
课设最终成绩90+，不用担心质量。
最后一个提醒，每个学校OS课设不一样，我这个是用优先级捐赠的方法解决优先级翻转问题（当然是针对Pintos内核）。
（总觉得自己想赚点CSDN积分也是蛮拼的==||。
So学弟学妹们酷爱来下吧括弧笑~）

TinyApp项目TinyApp是由MichaelMatich与NodeandExpress一起构建的全栈Web应用程序，它允许用户缩短长URL（有点。
ly）。
完成品依存关系Node.js表示EJS加密人体解析器cookie会话入门安装所有依赖项（使用npminstall命令）。
使用nodeexpress_server.js命令运转开发Web服务器。

Qt从零开始制造串口调试助手源代码(V1.0)-Creator_Ly

Blynk,knownasthemostuser-friendlyIoTplatform,providesawaytobuildmobileapplicationsinminutes.WiththeBlynkdrag-n-dropmobileappbuilder,anyonecanbuildamazingIoTapplicationswithminimalresourcesandeffort,onhardwarerangingfromprototypingplatformssuchasArduinoandRaspberryPi3toindustrial-gradeESP8266,Intel,SierraWireless,Particle,TexasInstruments,andafewothers.ThisbookusesRaspberryPiasthemainhardwareplatformandC/C++towritesketchestobuildprojects.Thefirstpartofthisbookshowshowtosetupadevelopmentenvironmentwithvarioushardwarecombinationsandrequiredsoftware.ThenyouwillbuildyourfirstIoTapplicationwithBlynkusingvarioushardwarecombinationsandconnectivitytypessuchasEthernetandWi-Fi.Thenyou'lluseandconfigurevariouswidgets(control,display,notification,interface,timeinput,andsomeadvancedwidgets)withBlynkAppBuildertobuildapplications.Towardstheend,youwilllearnhowtoconnectwithandusebuilt-insensorsonAndroidandiOSmobiledevices.FinallyyouwilllearnhowtobuildarobotthatcanbecontrolledwithaBlynkappthroughtheBlynkcloudandpersonalserver.Bytheendofthisbook,youwillhavehands-onexperiencebuildingIoTapplicationsusingBlynk.WhatyouwilllearnBuilddevicesusingRaspberryPiandvarioussensorsandactuatorsUseBlynkcloudtoconnectandcontroldevicesthroughtheBlynkappConnectdevicestoBlynkcloudandserverthroughEthernetandWi-FiMakeapplicationsusingBlynkapps(AppBuilder)onAndroidandiOSplatformsRunBlynkpersonalserverontheWindows,MAC,andRaspberryPiplatformsWhoThisBookIsForThisbookistargetedatanystakeholderworkingintheIoTsectorwhowantstounderstandhowBlynkworksandbuildexcitingIoTprojects.PriorunderstandingofRaspberryPi,C/C++,andelectronicsisamust.TableofContentsSettingupDevelopmentEnvironmentBuildingyourFirstBly

Blynk,knownasthemostuser-friendlyIoTplatform,providesawaytobuildmobileapplicationsinminutes.WiththeBlynkdrag-n-dropmobileappbuilder,anyonecanbuildamazingIoTapplicationswithminimalresourcesandeffort,onhardwarerangingfromprototypingplatformssuchasArduinoandRaspberryPi3toindustrial-gradeESP8266,Intel,SierraWireless,Particle,TexasInstruments,andafewothers.ThisbookusesRaspberryPiasthemainhardwareplatformandC/C++towritesketchestobuildprojects.Thefirstpartofthisbookshowshowtosetupadevelopmentenvironmentwithvarioushardwarecombinationsandrequiredsoftware.ThenyouwillbuildyourfirstIoTapplicationwithBlynkusingvarioushardwarecombinationsandconnectivitytypessuchasEthernetandWi-Fi.Thenyou'lluseandconfigurevariouswidgets(control,display,notification,interface,timeinput,andsomeadvancedwidgets)withBlynkAppBuildertobuildapplications.Towardstheend,youwilllearnhowtoconnectwithandusebuilt-insensorsonAndroidandiOSmobiledevices.FinallyyouwilllearnhowtobuildarobotthatcanbecontrolledwithaBlynkappthroughtheBlynkcloudandpersonalserver.Bytheendofthisbook,youwillhavehands-onexperiencebuildingIoTapplicationsusingBlynk.WhatyouwilllearnBuilddevicesusingRaspberryPiandvarioussensorsandactuatorsUseBlynkcloudtoconnectandcontroldevicesthroughtheBlynkappConnectdevicestoBlynkcloudandserverthroughEthernetandWi-FiMakeapplicationsusingBlynkapps(AppBuilder)onAndroidandiOSplatformsRunBlynkpersonalserverontheWindows,MAC,andRaspberryPiplatformsWhoThisBookIsForThisbookistargetedatanystakeholderworkingintheIoTsectorwhowantstounderstandhowBlynkworksandbuildexcitingIoTprojects.PriorunderstandingofRaspberryPi,C/C++,andelectronicsisamust.TableofContentsSettingupDevelopmentEnvironmentBuildingyourFirstBly

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。