ArcGISAPIforiOSV2.1正式发布了（今后后简称为ArcGISRuntimeSDKforiOS）。
　　此版本在V2.0.1的基础上提供iOS5的支持，新增功能包括：　　使用ArcGIS10.1tilepackages(*.tpkfiles)查看地图的内容，即便设备处于离线状态　　新的GPS自动平移模式，用于车辆导航和北斗导航　　灵活的标注定位　　旋转地图的能力　　如何将现有的应用程序迁移到新的V2.1版上去，以及了解更多的信息可以访问http://help.arcgis.com/en/arcgismobile/10.0/apis/ios/2.1/concepts/index.html。
了解更多ArcGIS移动产品，可访问专题：http://www.esrichina-bj.cn/softwareproduct/technology/ArcGIS%20Mobile/

GettogripswithmodernsoftwaredemandsbylearningtheeffectiveusesofRust'spowerfulmemorysafety.KeyFeaturesLearnandimprovethesequentialperformancecharacteristicsofyoursoftwareUnderstandtheuseofoperatingsystemprocessesinahigh-scaleconcurrentsystemLearnofthevariouscoordinationmethodsavailableintheStandardlibraryBookDescriptionMostprogramminglanguagescanreallycomplicatethings,especiallywithregardtounsafememoryaccess.Theburdenonyou,theprogrammer,liesacrosstwodomains:understandingthemodernmachineandyourlanguage'spain-points.Thisbookwillteachyoutohowtomanageprogramperformanceonmodernmachinesandbuildfast,memory-safe,andconcurrentsoftwareinRust.ItstartswiththefundamentalsofRustanddiscussesmachinearchitectureconcepts.YouwillbetakenthroughwaystomeasureandimprovetheperformanceofRustcodesystematicallyandhowtowritecollectionswithconfidence.YouwilllearnabouttheSyncandSendtraitsappliedtothreads,andcoordinatethreadexecutionwithlocks,atomicprimitives,data-parallelism,andmore.ThebookwillshowyouhowtoefficientlyembedRustinC++codeandexplorethefunctionalitiesofvariouscratesformultithreadedapplications.Itexploresimplementationsindepth.Youwillknowhowamutexworksandbuildseveralyourself.Youwillmasterradicallydifferentapproachesthatexistintheecosystemforstructuringandmanaginghigh-scalesystems.Bytheendofthebook,youwillfeelcomfortablewithdesigningsafe,consistent,parallel,andhigh-performanceapplicationsinRust.WhatyouwilllearnProbeyourprogramsforperformanceandaccuracyissuesCreateyourownthreadingandmulti-processingenvironmentinRustUsecoarselocksfromRust’sStandardlibrarySolvecommonsynchronizationproblemsoravoidsynchronizationusingatomicprogrammingBuildlock-free/wait-freestructuresinRustandunderstandtheirimplementat

Theacceleratingdeploymentoflarge-scaleweb,cloud,BigData,andvirtualizedcomputingsystemshasintroducedseriousnewchallengesinperformanceoptimization.Untilnow,however,littlereliable,practicalinformationhasbeenavailabletoITprofessionalswhoareresponsibleforrunningthesesystemsefficientlyandcost-effectively.SystemsPerformance:EnterpriseandtheCloudisthesolution.InternationallyrenownedperformanceoptimizationexpertBrendanGreggbringstogetherstate-of-the-arttechniquesandtoolsforanalysisandtuningoflarge-scaleweb/cloudcomputingenvironments.GreggfocusesonLinux/Unix/Solarisperformanceissues,whileofferingprovenmethodologiesanddiscussingkeyissuesthatapplytoallenterpriseoperatingsystems.Coverageincludes:Modernperformanceanalysisandcapacityplanning,includingkeyissuessuchaslatencyanddynamictracingNewperformanceandreliabilitychallengesassociatedwithcloudcomputingMethodology,concepts,terminology,tools,andmetricsKeytradeoffs,includingproblemsofloadvs.architectureTuningoperatingsystems,CPUs,memory,filesystems,disks,networks,andbussesTuningvirtualizedsystemsProgramminglanguageissuesrelatedtoperformance—includingapplicationprofilingforC,C++,Java,andnode.jsBenchmarkingstrategiesandpitfalls,includingcustommicrobenchmarking

介绍FacilityLocation相关算法的综述性的经典文献，推荐研究P-Median和P-Center的同僚们阅读。

数据库零碎概念第六版书后习题全部答案（英文）Database_System_Concepts_6th_edition-solutionstopracticeexercisesandexercises(answers)

DifferentialEquationsandLinearAlgebra(4thEdition)By作者:C.HenryEdwards–DavidE.Penney–DavidCalvisISBN-10书号:013449718XISBN-13书号:9780134497181Edition版本:4出书日期:2017-01-14pages页数:(768)Pearson纯净原版超清$204.4ForcoursesinDifferentialEquationsandLinearAlgebra.Concepts,methods,andcoretopicscoveringelementarydifferentialequationsandlinearalgebrathroughreal-worldapplicationsInacontemporaryintroductiontodifferentialequationsandlinearalgebra,acclaimedauthorsEdwardsandPenneycombinecoretopicsinelementarydifferentialequationswithconceptsandmethodsofelementarylinearalgebra.Renownedforitsreal-worldapplicationsandblendofalgebraicandgeometricapproaches,DifferentialEquationsandLinearAlgebraintroducesyoutomathematicalmodelingofreal-worldphenomenaandoffersthebestproblemssetsinanydifferentialequationsandlinearalgebratextbook.The4thEditionincludesfreshnewcomputationalandqualitativeflavorevidentthroughoutinfigures,examples,problems,andapplications.Additionally,anExpandedApplicationswebsitecontainingexpandedapplicationsandprogrammingtoolsisnowavailable.ContentsApplicationModulesPreface1First-OrderDifferentialEquations2MathematicalModelsandNumericalMethods3LinearSystemsandMatrices4VectorSpaces5Higher-OrderLinearDifferentialEquations6EigenvaluesandEigenvectors7LinearSystemsofDifferentialEquations8MatrixExponentialMethods9NonlinearSystemsandPhenomena10LaplaceTransformMethods11PowerSeriesMethodsReferencesforFurtherStudyAppendixA:ExistenceandUniquenessofSolutionsAppendixB:TheoryofDeterminantsAnswerstoSelectedProblems

《泛型编程与STL》阐述了泛型编程的中心思想：concepts、modeling、refinement,并为你展现这些思想如何导出STL的基础概念：iterators、containers、functionobjects.循此路线，你可以把STL想像为一个由concepts组成的程序库。
可作为深入学习泛型编程与STL的技术书籍

Duetothevendor-neutralbasisofthisbook,itdoesnotcontainanysignificantcoverageofcloudcomputingvendorproducts,services,ortechnologies.Thisbookiscomplementarytoothertitlesthatprovideproductspecificcoverageandtovendorproductliteratureitself.Ifyouarenewtotheco妹妹ercialcloudcomputinglandscape,youareencouragedtousethisbookasastartingpointbeforeproceedingtobooksandcoursesthatareproprietarytovendorproductlines.

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。