最新完整英文版ISO12402-2：2020Personalflotationdevices—Part2:Lifejackets,performancelevel275—Safetyrequirements（个人漂浮装置-第2部分：性能275级救生衣-安全要求），本标准指定了性能等级为275的救生衣的安全要求。
它适用于成人，儿童或婴儿，在严酷条件下海上使用，使用防护服或正在搬运额外负载时的救生衣。

DistributedSystems(3rd)英文无水印原版pdf第3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Copyright@2017MaartenvanSteenandAndrewS.TanenbaumPublishedbyMaartenvanSteenThisbookwaspreviouslypublishedby:PearsonEducation,IncISBN:978-15-430573-8-6(printedversion)ISBN:978-90-815406-2-9(digitalversion)Edition:3.Version:01(February2017)AllrightstotextandillustrationsarereservedbyMaartenvanSteenandAndrewS.Tanenbaum.Thisworkmaynotbecopied,reproduced,ortranslatedinwholeorpartwithoutwrittenpermissionofthepublisher,exceptforbriefexcerptsinreviewsorscholanyformofinformationstorageadaptationorwhatever,computersoftware,orbysimilarordissimilarmethodsnowknownordevelopedinthefutureisstrictlyforbiddenwithoutwrittenpermissionofthepublisherToMarielle,max,andelkeMVSToSuzanneBarbara,Marvin,Aronnathan,olivia,andmirteASTCONTENTSPreface1Introduction1.1Whatisadistributedsystem?Characteristic1:Collectionofautonomouscomputingelements2Characteristic2:SinglecoherentsystemMiddlewareanddistributedsystems1.2DesigngoalsSupportingresourcesharingMakingdistributiontransparent12Beingscalable15Pitfalls243Typesofdistributedsystems24Highperformancedistributedcomputing25Distributedinformationsystems34Pervasivesystems1.4Summary522Architectures552.1Architecturalstyles56Layeredarchitectures.57Object-basedandservice-orientedarchitectures62Resource-basedarchitectures64Publish-subscribearchitectures2.2MiddlewareorganizationWrappersInterceptors垂番Modifiablemiddleware752.3SystemarchitectureCONTENTSCentralizedorganizations76Decentralizedorganizations:peer-to-peersystemsHybridarchitectures2.4Examplearchitectures94TheNetworkFilesystem94TheWeb982.5Summary3Processes1033.1Threads..104Introductiontothreads104Threadsindistributedsystems1113.2Virtualization116Principleofvirtualizationapplicationofvirtualmachinestodistributedsystems,1223.3Clients124Networkeduserinterfaces124Client-sidesoftwarefordistributiontransparency1273.4Servers128Generaldesignissues129Objectservers133Example:TheApacheWebserver139Serverclusters,,,,,,,1413.5Codemigration152Reasonsformigratingcode152Migrationinheterogeneoussystems1583.6Summary1614Communication4.1Foundations164LayeredProtocols164TypesofCommunication.1724.2Remoteprocedurecall..173Basicrpcoperation174Parameterpassing178RPC-basedapplicationsupport182VariationsonrPc185Example:dCErPc,.1884.3Message-orientedcommunication193Simpletransientmessagingwithsockets.193Advancedtransientmessaging198Message-orientedpersistentcommunication206Example:IBM'sWebSpheremessage-queuingsystem212Example:AdvancedMessageQueuingProtocol(AMQP)....218DS3.01DOWNLOADEDBYTEWIGOMIXMAIL.INFOCONTENTS4.4Multicastcommunication221Application-leveltree-basedmulticasting221Flooding-basedmulticasting225Gossip-baseddatadissemination2294.5Summary2345Naming2375.1Names,identifiersandaddresses2385.2Flatnaming.241Simplesolutions241Home-basedapproaches245Distributedhashtables246Hierarchicalapproaches2515.3Structurednaming256Namespaces.256Nameresolution259Theimplementationofanamespace264Example:TheDomainNameSystem271Example:TheNetworkFileSystem2785.4Attribute-basednaming283Directoryservices283Hierarchicalimplementations:LDAP285Decentralizedimplementations2885.5Summary2946Coordination2976.1Clocksynchronization.298Physicalclocks299Clocksynchronizationalgorithms3026.2Logicalclocks310Lamport'slogicalclocks310Vectorclocks3166.3Mutualexclusion321322acentralizedalgorithm.322adistributedalgorithm323atoken-ringalgorithm.325adecentralizedalgorithm3266.4Electionalgorithms329Thebullyalgorithm.,..330Aringalgorithm332Electionsinwirelessenvironments333Electionsinlarge-scalesystems.3356.5Locationsystems336DOWNLOADEDBYTEWIGOMIXMAIL.INFODS301VIllCONTENTSGPS:GlobalPositioningSystem337WhengPsisnotanoption339Logicalpositioningofnodes3396.6Distributedeventmatching..343Centralizedimplementations3436.7Gossip-basedcoordination349asgregation349Apeer-samplingservice350Gossip-basedoverlayconstruction3526.8Summary3537Consistencyandreplication3557.1Introduction356Reasonsforreplication356Replicationasscalingtechnique3577.2Data-centricconsistencymodels358Continuousconsistency359Consistentorderingofoperations364Eventualconsistency3737.3Client-centricconsistencymodels375MonotonicreadsMonotonicwrites.379Readyourwrite380Writesfollowreads3827.4ReplicamanagementFindingthebestserverlocation383Contentreplicationandplacement..385Contentdistribution..388Managingreplicatedobjects3937.5Consistencyprotocols.396Continuousconsistency..........396Primary-basedprotocols398Replicated-writeprotocolsCache-coherence403Implementingclient-centricconsistency,,...4077.6Example:CachingandreplicationintheWeb4097.7Summar4208Faulttoleran4238.1Introductiontofaulttolerance424Basicconcepts.424Failuodels427Failuremaskingbyredundancy8.2Processresilience432DS3.01DOWNLOADEDBYTEWIGOMIXMAIL.INFO

ThisbookisallaboutDTrace,withtheemphasisonusingDTracetounderstand,observe,anddiagnosesystemsandapplications.AdeepunderstandingofthedetailsofhowDTraceworksisnotnecessarytousingDTracetodiagnoseandsolveproblems;thus,thebookcoversusingDTraceonsystemsandapplications,withcommand-lineexamplesandagreatmanyDscripts.Dependingonyourlevelofexperience,weintendthebook’sorganizationtofacilitateitsuseasareferenceguide,allowingyoutorefertospecificchapterswhendiagnosingaparticularareaofthesystemorapplication.

InATourofC++,SecondEdition,BjarneStroustrup,thecreatorofC++,describeswhatconstitutesmodernC++.Thisconcise,self-containedguidecoversmostmajorlanguagefeaturesandthemajorstandard-librarycomponents—not,ofcourse,ingreatdepth,buttoalevelthatgivesprogrammersameaningfuloverviewofthelanguage,somekeyexamples,andpracticalhelpingettingstarted.StroustruppresentstheC++featuresinthecontextoftheprogrammingstylestheysupport,suchasobject-orientedandgenericprogramming.Histourisremarkablycomprehensive.Coveragebeginswiththebasics,thenrangeswidelythroughmoreadvancedtopics,includingmanythatarenewinC++17,suchasmovesemantics,uniforminitialization,lambdaexpressions,improvedcontainers,randomnumbers,andconcurrency.ThetourevencoverssomeextensionsbeingmadeforC++20,suchasconceptsandmodules,andendswithadiscussionofthedesignandevolutionofC++.Thisguidedoesnotaimtoteachyouhowtoprogram(forthat,seeStroustrup’sProgramming:PrinciplesandPracticeUsingC++,SecondEdition),norwillitbetheonlyresourceyou’llneedforC++mastery(forthat,seeStroustrup’sTheC++ProgrammingLanguage,FourthEdition,andrecommendedonlinesources).If,however,youareaCorC++programmerwantinggreaterfamiliaritywiththecurrentC++language,oraprogrammerversedinanotherlanguagewishingtogainanaccuratepictureofthenatureandbenefitsofmodernC++,youcan’tfindashorterorsimplerintroductionthanthistourprovides.

Trackingmovinginterfacesincomputationalgeometry,materialssciences,robotics,imageprocessing,andfluidmechanics;

zigbeeZCL协议2018最新版Removedtheextraneousword“ZigBee”todescribeitems.CCB2288Chapter1:referenceforManufactureCodedatabaseChapter2:clarifiedclusterInstanceModelCCB23272266233822132318DefineDeprecationNewdatatype:FixedASCIIChapter3:LevelControlclusterStateChangeTableNewBasicattributes;ZCLVersionis0x03TransitiontimetoRecallSceneNFRQualityofGoodsclusters:PWM,LevelZLO1.0changestoLevelControlforLightingCCB14991584177520852147

自己训练的车辆识别分类器级联层数16基于HOG特征

层级管理器。
凭借强大而且容易操作的层级配置器，您可以在几分钟内设置自己的层级工作流程。
您甚至可以准备多种配置！（例如，用于演示版本）层级选取器。
基于之前的层级设置快速生成您的层级选取界面。
您可以做一个格栅或地图。
它对于移动设备和文具做了优化！进度保存/加载工具。
所有进度在游戏启动时自动保存和加载。
是否很炫酷？！新场景加载API。
摆脱Application.LoadLevel（）！从现在开始，您可以使用MadLevel.LoadNext（）并且下一层级将会根据您的层级配置加载。
就是这样的简单！功能：:-可以在Unity5下运行-PlayMaker集成-丰富的API（层级，保存&加载，图形）-Mesh字体支持（BMFont,GlyphDesigner）-层级群组（世界）-扩展（加载，界面，分数，等。
-针对不同配置设计的运行示例-两个完整的高品质主题-整合了inspector的WYSIWYG界面-可以应用于C#,JavaScript和Boo项目-包括C#资源-在PC,Mac,Android,iOS,和WP8完成测试-可以在Unity和UnityPro＞=3.5.5下运行

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

用来压缩和解压的，以下是部分函数：intcompress(Bytef*dest,uLongf*destLen,constBytef*source,uLongsourceLen);intcompress2(Bytef*dest,uLongf*destLen,constBytef*source,uLongsourceLen,intlevel);intuncompress(Bytef*dest,uLongf*destLen,constBytef*source,uLongsourceLen);typedefvoidpgzFile;gzFilegzopen(constchar*path,constchar*mode);gzFilegzdopen(intfd,constchar*mode);intgzsetparams(gzFilefile,intlevel,intstrategy);intgzread(gzFilefile,voidpbuf,unsignedlen);intgzwrite(gzFilefile,constvoidpbuf,unsignedlen);intVAgzprintf(gzFilefile,constchar*format,...);intgzputs(gzFilefile,constchar*s);char*gzgets(gzFilefile,char*buf,intlen);intgzputc(gzFilefile,intc);intgzgetc(gzFilefile);intgzflush(gzFilefile,intflush);z_off_tgzseek(gzFilefile,z_off_toffset,intwhence);z_off_tgztell(gzFilefile);intgzrewind(gzFilefile);intgzeof(gzFilefile);intgzclose(gzFilefile);constchar*gzerror(gzFilefile,int*errnum);

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。