Thisbookwaswrittenusingatutorialapproachandisintendedtoappealtoabroadaudience.Thebookcoversthefundamentalsofshort-rangewirelessnetworkingusingZigBee™andIEEE802.15.4™standards.TheZigBeeandIEEE802.15.4standardsarecoveredwiththesamelevelofdetail.Inadditiontotechnicaldetails,thebookcontainshigh-leveloverviewsthatwouldbeinformativeforareaderwhoisonlyinterestedinunderstandingthegeneralconceptofZigBeewirelessnetworking.ThisbookprovidesthebigpictureofZigBeewirelessnetworking,fromtheradiofrequency(RF)andphysicallayerconsiderationsuptotheapplicationlayerdetails.Consideringthemultidisciplinarynatureofthisbook,therequiredbackgroundmaterialsarealsoprovided.

opencv3.4需要的ippicv_2017u3_lnx_intel64_general_20180518.tgzlinux电脑下，可能会无法下载此包，传到这里，可以下载。

CategoricalDataAnalysis,ThirdEditionsummarizesthelatestmethodsforunivariateandcorrelatedmultivariatecategoricalresponses.ReaderswillfindaunifiedgeneralizedlinearmodelsapproachthatconnectslogisticregressionandPoissonandnegativebinomialloglinearmodelsfordiscretedatawithnormalregressionforcontinuousdata.ALANAGRESTIisDistinguishedProfessorEmeritusintheDepartmentofStatisticsattheUniversityofFlorida.Hehaspresentedshortcoursesoncategoricaldatamethodsinthirtycountries.

类似MSVC的MSDN手册，包含了GeneralC/C++、StandardCLibrary、C++和C++StandardTemplateLibrary四个部分。

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

安装：把general下的4个文件和nativexml下的5个文件复制在一起，然后通过Tools＞Options＞DelphiOptions＞Library＞Librarypath指定路径就可以了。
可能作者的本意并非如此，但这样很简单。

本人使用9930将近50天，手机刚买来是OS7.1.0.163的rom，感觉掉电严重太快，基本是半天就要充电，所以我都是随身携带充电器，看到插座就往上插，之后天天晚上看看论坛，发现有很多人说刷新版rom可以解决用电问题，我就开始找帖子看，看了三四个晚上，发现论坛写9930刷机的帖子少，而且不完整，不仔细，太过简洁，不适合新手，我这个帖子就是专门一步一步的教新手刷机，如果看完我的帖子还是不会刷，那么我觉得你已经笨到一定境界了。
老鸟可以无视我的帖子。
详细刷机过程，回复可见，我只是觉得自己写的很认真，希望能给大家带来帮助。
不想帖子被埋没。
才设置回复可见。
。
【【【一】】】下面我来说一下刷机步骤：一。
安装桌面管理器（安装位置就选择默认吧，如果有的朋友安装完忘记自己安装在哪了，可以右击桌面上的“BlackBerryDesktopSoftware”查看属性就能看到具体位置）“黑莓桌面管理器DesktopManagerv7.1.0.31”下载地址《http://115.com/file/e71pa3eg#710-b032-multilanguage.exe》“黑莓桌面管理器6.0多国语言版”下载地址《http://download.pchome.net/home/mobile/general/detail-173650.html》随便装哪个，看个人喜好，无所谓的事。
二。
安装好桌面管理器了，就把手机连电脑，选择“usb驱动模式”，打开桌面管理器，备份《如果自己感觉手机里没啥重要的就别备份了》，备份完毕后可以把手机与数据线拔开三。
安装你下载好的rom，这里我推荐两个9930的rom。
一，“OS7.1.0.267泄露版”（优点：是9930最省电的rom。
缺点：1，信号不好2，触摸屏幕灵敏度不好3，没中文输入法《这些都是我把论坛用过267rom的意见总结起来，并不是我亲自测试的，朋友们别喷我，自己可以刷了试试，》）rom下载地址《http://115.com/file/belipcwq》二，“OS7.1.0.402全语言测试版”（挂着qq，偶尔聊聊天，五六条短信，三个小时掉15%的电量，百分之百有中文输入和中文显示。
由于刚刚刷，所以只测试了电量消耗情况。
原本用的163的rom掉电速度绝对是402的两三倍。
！！本人亲测！！！！）rom下载地址《http://115.com/file/dpna754d》四。
进去我的电脑"C:\ProgramFiles\CommonFiles\ResearchInMotion\AppLoader”目录，找到Vendor.xml文件，将其删除。
五。
安装“BerryBox”下载地址《http://www.cr173.com/soft/27672.html》等“BerryBox”安装好了，再次将手机与电脑连接，打开“BerryBox”，左击“刷新设备”，然后左击“连接设备”，然后左击“系统工具”，找到“WIPE手机”那一栏，在“-a和-f”前面勾上，然后左击“WIPE”。
然后手机会显示507,然后把手机与数据线拔开，然在在插上《具体为什么拔开插上我也不知道，跟人家学的，您也可以选择不拔开》　　六。
打开我的电脑"C:\ProgramFiles\CommonFiles\ResearchInMotion\AppLoader”目录，找到“Loader”《图标看起来跟一个手机差不多》，双击它！　　按照个人要求进行选择安装，语言那一块，上面只有英语法语等等。
。
别急。
。
往下拉。
。
中午输入中文显示在几乎最下面，仔细看。
设置好点“确定”　七。
等到电脑上显示完成了，就可以拔开数据线。
等待手机启动《手机启动时间非常漫长，别急》。
手机开机了都是英语，别怕，自己到设置语言的地方去跟换！别告诉我不知道在哪设置！！那刷机前记记清楚！！！八。
刷机完毕，连接桌面管理器，导入sb，这个别忘了！然后就OK了。
。
。
。
。
【【【二】】】关于黑莓9930有争议的几点《写号的朋友别看了》：1.谷

Thisneweditiontotheclassicbookbyggplot2creatorHadleyWickhamhighlightscompatibilitywithknitrandRStudio.ggplot2isadatavisualizationpackageforRthathelpsuserscreatedatagraphics,includingthosethataremulti-layered,withease.Withggplot2,it'seasyto:producehandsome,publication-qualityplotswithautomaticlegendscreatedfromtheplotspecificationsuperimposemultiplelayers(points,lines,maps,tiles,boxplots)fromdifferentdatasourceswithautomaticallyadjustedcommonscalesaddcustomizablesmoothersthatusepowerfulmodelingcapabilitiesofR,suchasloess,linearmodels,generalizedadditivemodels,androbustregressionsaveanyggplot2plot(orpartthereof)forlatermodificationorreusecreatecustomthemesthatcapturein-houseorjournalstylerequirementsandthatcaneasilybeappliedtomultipleplotsapproachagraphfromavisualperspective,thinkingabouthoweachcomponentofthedataisrepresentedonthefinalplotThisbookwillbeusefultoeveryonewhohasstruggledwithdisplayingdatainaninformativeandattractiveway.SomebasicknowledgeofRisnecessary(e.g.,importingdataintoR).ggplot2isamini-languagespecificallytailoredforproducinggraphics,andyou'lllearneverythingyouneedinthebook.Afterreadingthisbookyou'llbeabletoproducegraphicscustomizedpreciselyforyourproblems,andyou'llfinditeasytogetgraphicsoutofyourheadandontothescreenorpage.TableofContentsPartIGettingStartedChapter1IntroductionChapter2GettingStartedwithggplot2Chapter3ToolboxPartIITheGrammarChapter4MasteringtheGrammarChapter5BuildaPlotLayerbyLayerChapter6Scales,AxesandLegendsChapter7PositioningChapter8ThemesPartIIIDataAnalysisChapter9DataAnalysisChapter10DataTransformationChapter11ModellingforVisualisationChapter12Programmingwithggplot2

datalinearfilteringproblem[Kalman60].Sincethattime,dueinlargeparttoadvancesindigitalcomputing,theKalmanfilterhasbeenthesubjectofextensiveresearchandapplication,particularlyintheareaofautonomousorassistednavigation.Avery“friendly”introductiontothegeneralideaoftheKalmanfiltercanbefoundinChapter1of[Maybeck79],whileamorecompleteintroductorydiscussioncanbefoundin[Sorenson70],whichalsocontainssomeinterestinghistoricalnarrative.Moreextensivereferencesinclude[Gelb74;Grewal93;Maybeck79;Lewis86;Brown92;Jacobs93].

HFSS14win64位的破解文件1、双击运行文件里面的autorun安装软件，一步一步的全部按照默认选项就行（有一个地方让选USB还是硬盘默认的是USB那个图标，感觉影响不大）。
在指定license的时候给出破解文件里license的路径。
2、安装AnsoftLibraries，选择不安装RSM。
3、將破解文件裡面的license複製貼到admin，将其余四个文件desktop.dll、HFIECOMENGINE.exe、HFSSCOMENGINE.exe，以及hfsslib.dll复制到安装目录HFSS14.0\Win64，覆盖原有文件。
4、破解完毕后即可打开软件，出现错误信息Internalerror:WebUpdate，不要理它，进入HFSS选中Tools-＞Options-＞GeneralOptions-＞WebUpdateOptions(tab)-＞Never就可以避免再出现该信息了(将自动检查更新选项改成never，就是不要通过网络升级)。
5、通过Tools-＞Options-＞GeneralOptions选择工作目录或者临时文件夹。
工作目录或者临时工作文件夹的路径里面不要带有中文字符，不然打开软件后，过几分钟会出现一个对话框，说遇到了错误，然后就停止工作了。
6、双核运行及内存问题：安装以后在（1）：tools-opiton-hfssoptions-General-postprocessingoptions里面把NumberofProcessors设置成2；
（2）：tools-opiton-hfssoptions-solver里面把NumberofProcessors(两处)设置成2。
内存不用设置，hfss自动可以管理超过8G的内存。

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。