STM32机械臂设计详细说明机械臂在近十几年的发展中,已经实现根据软件程序的设计操作机械臂完成相应的特定工作.它不仅可以在人们无法作业的环境下工作,而且还能保持长时间的作业和低失误率.本文简要介绍基于STM32的机械手臂控制系统实现方案.

本书取材于摩擦学研究最新进展以及作者和同事们长期从事该领域研究的成果,系统地阐述摩擦学的基本原理与应用,全面反映现代摩擦学的研究状况和发展趋势。
全书共18章,由润滑理论与润滑设计、摩擦磨损机理与控制、应用摩擦学等三部分组成。
除摩擦学传统内容外,还论述了摩擦学与相关学科交叉而形成的研究领域。
本书针对工程实际中各种摩擦学现象,着重阐述在摩擦过程中的变化规律和特征,进而介绍基本理论和分析计算方法以及实验测试技术,并说明它们在工程中的实际应用。
本书可作为机械设计与理论专业的研究生教材和高等院校机械工程各类专业师生的教学参考书,亦可供从事机械设计和研究的工程技术人员参考。

机械原理习题答案详解绝对好东西绝对值得下载棒

matlab牛头刨床的源代码，机械原理要做的作业，里面带有注释和讲解，很详细。

IT项目管理（英文版.第四版）/（美）施瓦尔布（Schwalbe，K.）著.—北京:机械工业出版社，2006.7（经典原版书库）课后习题答案语言——英文Class130613Team3MadeByWangWanHongorganizationscollectandcontrolanentiresuiteofprojectsorinvestmentsasonesetofinterrelatedactivitiesinaportfolio.Theprojectportfoliomanagementingeneralisdividedintofivelevels,fromthesimpletothecomplexare:1]Putalltheitemsintoadatabase2Settingprioritiesfortheitemsinthedatabase3]Accordingtothedifferenttypeofinvestment,theseitemsweredividednto2-3Budget4RunKnowledgebaseautomatically5ApplythemodernPortfolioTheory7.WhataretheskillsrequiredforProjectManagers?Answer:Projectmanagersneedawidevarietyofskills.Theyneedbothhard"andsoftskillsHardskillsincludeproductknowledgeandknowinghowtousevariousprojectmanagementtoolsandtechniquesoSoftskillsincludebeingabletoworkwithvarioustypesofpeople.1)Communicationskills:Listens,persuades2)Organizationalskills:Plans,setsgoals,analyzes3)Team-buildingskills:Showsempathy(同感,共鸣),motivates,promotesespritdecorps4)Leadershipskills:Setsexamples,providesvision(bigpicture),delegatespositive,energetic5]Copingskills:Flexible,creative,patient,persistent6Technologyskills:Experience,projectknowledge8.ExpandPMiandPMP?AnswerPMI:ProjectManagementInstitutePMP:ProjectManagementProfessionaChapter-21.ExplainSystemApproachofProjectmanagement?AnswersSystemsapproachdescribesaholistic(A])andanalyticalapproachtoPage3Class130613Team3MadeByWangWanHongsolvingcomplexproblemsThreepartsinclude:Systemsphilosophy:Viewthingsassystems,whichareinteracting(fh互作用)componentsthatworkwithinanenvironmenttofulfillsomepurposeSystemsanalysisisaproblem-solvingapproach1)Definethescopeofthesystem2Divideintocomponents3Identifyandevaluatingsystemproblems,opportunities,constraintsandneeds4]Examinealternativesolutionforimprovingthecurrentsituation5)Identify(f)ansolutionoractionplanandexaminethatplanagainsttheentiresySystemsmanagement:Addressbusiness,technological,andorganizationalissuesassociatedwithcreating,maintaining,andmakingchangestosystems1Identifyandsatisfythekeystakeholders2Doingthebestfortheorganization2.Whatarethethreebasicorganizationalstructures?Answer:Threegeneralclassificationsoforganizationalstructuresarefunctional,project,andmatrix.Afunctionalorganizationalstructureisthehierarchy.Functionalmanagersorvicepresidentsinspecialtiesreporttotheceo.Thestaffshavespecializedskills.Aprojectorganizationalstructurealsohasahierarchicalstructure,buttheirprogrammanagersreporttotheceoAmatrixorganizationalstructurerepresentsthemiddlegroundbetweenfunctionalandprojectstructures3.DrawandexplainthephasesofthetraditionalprojectLifeCycle?Answer:Page4Class130613Team3MadeByWangWanHongProjectFeasibilityProjectAcquisitionConceptDevelopmentImplementationClose-outFigurePhasesofthetraditionalprojectlifecycleIntheconceptphaseofaproject,managersusuallybrieflydescribetheproject-theydevelopaveryhigh-levelorsummaryplanfortheproject,whichdescribestheneedforprojectandbasicunderlyingconceptInthedevelopmentphase,theprojectteamcreatesmoredetailedprojectplans,amoreaccuratecostestimate,andamorethoroughwbsIntheImplementationphase,theprojectteamcreatesadefinitiveorveryaccuratecostestimate,deliverstherequiredwork,andprovidesperformancereportstostakeholdersIntheclose-outphase,alloftheworkiscompleted,andthereshouldbesomesortofcustomeracceptanceoftheentireproject4.Whatarephaseexits?Answer:phaseexitsarethephase-endreviewofkeydeliverablesthatallowtheorganizationtoevaluatetheprojectsperformanceandtotakeimmediateactiontocorrectanyerrorsorproblems5.Howcantopmanagementhelpprojectmanagers?Answer:TopmanagementcanhelpprojectmanagersinthefollowingwaysTheprojectmanagerneedsadequate(足够的)resourcesThebestwaytokillaprojectistowithhold(E)therequiredmoney,humanresources,andvisibilityfortheproject.Iftheprojectmanagershavetopmanagementcommitment,theywillalsohaveadequateresourcesandnotbedistractedbyeventsthatdonotaffecttheirspecificprojectsProjectmanagersoftenrequireapprovalforuniqueprojectneedsinatimelymannerProjectmanagersmusthavecooperationfrompeopleinotherpartsofthePage5Class130613Team3MadeByWangWanHongorganizationProjectmanagersoftenneedsomeonetomentorandcoachthemonleadershipissuesChapter-31.ExplainProjectmanagementprocessgroups?AnswerInitiatingPlanningExecutingandControllingClosingProcessProcessProcessProcessProcessGroupGrouproupGroupGroupActivityStartFinishTimeMonitoringInitiatingExecutingandClosingControllig∩,,PlanningkProjectmanagementprocessgroupsprogressfrominitiationactivitiestoplanningactivities,executingactivities,monitoringandcontrollingactivities,andclosingactivities.Initiatingprocessesincludedefiningandauthorizingaprojectorprojectphase.Planningprocessesincludedevisingandmaintainingaworkablescheme.ExecutingprocessesincludecoordinatingpeopleandotherresourcesMonitoringandcontrollingprocessesincluderegularlymeasuringandmonitoringprogresstoensurethattheprojectteammeetstheprojectobjectives.ClosingprocessesincludeformalizingacceptanceoftheprojectorprojectphaseandendingitefficientlyPage6Class130613Team3MadeByWangWanHongChaptter-41.DrawProjectManagementFramework?Answer:TheProjectManagementFrameworkisProjectPortfolioProject1Project9KnowledgeAreasToolsandProject3EySEnterpriseProject4uccessCorefunctionstechniquesProject5TimeCostQualityProject6MatMgt.MgtMat1gProjectIntegrationManagementProjectStakeholders'SuccessedsandexpectatonsHRComm.RiskProcure.G++MatMatMgtMatFacilitatingFunctions2.ListthevariousProjectIntegrationManagementProcesses?Answer1)Developtheprojectcharter,whichinvolvesworkingwithstakeholderstocreatethedocumentthatformallyauthorizesaproject-thecharter2)Developthepreliminaryprojectscopestatement,whichinvolvesurtherworkwithstakeholders,especiallyusersoftheproject'sproducts,services,orresults,todevelopthehigh-levelscoperequirements.Theoutputofthisprocessistheprocessisthepreliminaryprojectscopestatement3Developtheprojectmanagementplan,whichinvolvescoordinatingallplanningeffortstocreateaconsistent,coherentdocument-theprojectmanagementplan4Directandmanageprojectexecution,whichinvolvescarryingouttheprojectmanagementplanbyperformingtheactivitiesincludedinit.Theoutputsofthisprocessaredeliverables,requestedchanges,workperformanceinformation,implementedchangerequest,correctiveactions,preventiveactions,anddefectrepair.5)Monitorandcontroltheprojectwork,whichinvolvesoverseeingPage7Class130613Team3MadeByWangWanHongprojectworktomeettheperformanceobjectiveoftheproject.Theoutputsofthisprocessarerecommendeddefectrepair,andrequestedchanges6)Performintegratedchangecontrol,whichinvolvescoordinatingchangesthataffecttheproject'sdeliverablesandorganizationalprocessassets.Theoutputsofthisprocessincludeapprovedandrejectedchangerequests,approvedcorrectiveandpreventiveactions,approvedandvalidateddefectrepair,deliverables,andupdatestothepIrojectmanagementplanandprojectscopestatement.7Closetheproject,whichinvolvesfinalizingallprojectactivitiestoformallyclosetheprojectOutputsofthisprocessincludefinalproducts,services,orresults,administrativeandcontractclosureprocedures,andupdatestoorganizationalprocessassets3.WhatisSWotanalysis?Answer:SWOTAnalysisisastrategicplanningmethodusedtoevaluatetheStrengths,Weaknesses,Opportunities,andThreatsinvolvedinaprojectorinabusinessventure.Itinvolvesspecifyingtheobjectiveofthebusinessventureorprojectandidentifyingtheinternalandexternalfactorsthatarefavorableandunfavorabletoachievingthatobjective4.WhatisaProjectcharterdocument?Answer:Aprojectcharterisadocumentthatformallyrecognizestheexistenceofaprojectandprovidesdirectionontheproject'sobjectivesandmanagement5.Whatisscopestatementdocument?Answer:ScopeStatementisadocumentfortherighttoreachacommonunderstandingofprojectscopeaswellastheconfirmation.Itdescribesindetailwhatworkshouldbeaccomplishedintheproject,andisanimportanttooltopreventthespreadofthescope.Scopestatementshouldincludetheoverallprojectobjectivesanddescription,productdescription,allprojectdeliverables,aswellasasynthesisofthedeterminantsofsuccessoftheprojectdescriptions6.Whatisscopecreeps?Answer:Scopecreepisthetendencyofaprojecttoincludemoretasksortoimplementmoresystemsthanoriginallyspecified,whichoftenleadstoPage8Class130613Team3MadeByWangWanHonghiigherthanplannedprojectcostsandanextensionoftheinitialimplementationdate.Inotherwordsitbasicallymeansafeaturethatwasinitiallythoughttobesimplethat'sexplodinginscale7.Whatarethecommonelementsofaprojectmanagementplan?AnsweroIntroductionoroverviewoftheproject1)Projectname2Projectdescriptionitsneed3Sponsor'sname4NamesofthePMProjectTeamdEliverables6Listofreferencematerials7)ListofdefinitionsandacronymsoDescriptionofhowtheprojectisorganizedOrganizationalcharts2Projectresponsibilities3Otherorganizationalorprocess-relatedinformationManagementandtechnicalprocessesusedontheproject1)ManagementobjectivesProjectControls3RiskManagement4staffing5TechnicalProcessesoWorktobedone,schedule,andbudgetinformation1)Majorworkpackages2)Keydeliverables3)Otherwork-relatedinformation4Summaryschedule5Detailedschedule6Otherschedule-relatedinformation7Summarybudgets8Detailedbudget9)OtherbudgetrelatedinformationPage9Class130613Team3MadeByWangWanHong8.Whatisstakeholderanalysis?Answer:Stakeholderanalysisisanimportanttechniqueforstakeholderidentificationanalyzingtheirneeds.Itisusedtoidentifyallkeystakeholderswhohavevestedinterestintheissueswithwhichtheprojectisconcerned.Theaimofstakeholderanalysisprocessistodevelopastrategicviewofthehumanandinstitutionallandscape,andtherelationshipsbetweenthedifferentstakeholdersandtheissuestheycareaboutmost9.ExplainCCBsAnswer:CCBisaChangeControlBoardforshort.CCBsprovideguidelinesforpreparingchangerequests,evaluatechangerequests,andmanagetheimplementationofapprovedchanges10.Explain48-hourspolicy?Answer:A"48-hourpolicy"canhelptaskleadersonalargeinformationtechnologyprojectreachagreementsonkeydecisionsorchangeswithintheirexpertiseandauthority.Itallowsprojectteammemberstomakeadecisionandhave48hourstoseekapprovalfromtopmanagement.Iftheteamdecisioncannotbeimplemented,managementhas48hourstoreverseadecision;otherwise,theteamsdecisionisapprovedChapter-51.WhatisProjectScopeManagement?Answer:Projectscopemanagementisthedefinitionaboutwhatisincludedandwhatisnotincludedintheprojectandtheprocessofcontrolling.Thisprocessensuresthattheprojectteamandstakeholdershaveacommonunderstandingoftheprojectproductsastheprojectresultandtheprocessesusedinproducingtheseproducts.Themainprocessesare:Scopeplan;Scopedefinition;CreateWBS;Scopeconfirm;Scopecontrol2.ListthevariousProjectscopemanagementProcesses?AnswereScopeplanningDecidinghowthescopewillbedefined,verified,andcontrolledandhowthewbswillbecreatedPage10

题目/*很多人都喜欢带手表，手表的种类很多，主要分为石英表，机械表，光能表。
•所有的手表都有自己的名字；
•所有的手表都有年月日时分秒（6个属性），并且可以显示时间；
•所有的手表都可以连续打出五次自己的广告语；
•机械表可以自动上弦；
•石英表中的天梭（TISSOT）和机械表中的欧米茄（OMEGA）有秒表计时功能（不需要实现计时的具体逻辑）；
•光能表中的卡西欧（CASIO）可以计算X天之后是哪一天（需要自己实现逻辑，不能使用C#自带的DateTime类，注意闰年）；
现在大连有一家表店有如下这些手表：机械表：欧米茄(OMEGA)，万国（IWC）光能表：卡西欧(CASIO)，西铁城（CITIZEN）石英表：天梭(TISSOT)，雷达（RADO）写一个方法，让这些手表按顺序展示下自己的功能。

电阻丝在外力作用下发生机械形变时，其电阻值发生变化，这就是电阻应变效应。
描述电阻应变效应的关系式为：式中：为电阻丝电阻相对变化，K为应变灵敏系数，为电阻丝长度相对变化。

．下列现象中不是机械运动的是()A、划破夜空的流星运动B、奔驰骏马的运动C、植物开花结果　D、地球绕太阳公转．下列说法中错误的是()A.宇宙中的一切物体都在运动,静止是相对的B.静止的物体可以选为参照物,运动的物体不可以C.参照物可以看情况而选D.对某一物体来说,参照物不同,运动情况也可能不同．(2012福建福州)2012年国际田联110m栏比赛中，刘翔以12秒97破赛会记录夺得冠军。
如图l所示是刘翔在跨栏时的情景，若说赛场的主席台是运动的，可选的参照物是：（）A．刘翔B．看台上坐着的观众C．地面D．刘翔前方立着的栏

步进电机控制机械臂源码代码步进电机控制机械臂源码代码步进电机控制机械臂源码代码

在各种机器人中，工业机器人应用较早，发展最为成熟。
同时，技术的不断进步一直在牵引着机器人学科的发展，使机器人的应用领域从工业机器人扩展到特种机器人和服务机器人等。
机器人技术也正越来越深刻地影响着我们的生活。
机器人不但将在工厂、实验室与人一起工作，还将在车站、机场、码头、交通路口为人们指引路径、回答问题、帮助行人。
机器人还将步入千家万户，为老人端茶送水，护理伤病人等等。
未来机器人将会越来越广泛地进入人类社会，人类对机器人的依赖会如同现时对待计算机一样，即使是短时间的离开都可能会造成很大不便。
机器人化是先进制造领域的重要标志和关键技术，针对先进制造业生产效率提高的诸多瓶颈问题，尤其是在汽车产业中，机器人得到了广泛的应用。
如在毛坯制造(冲压、压铸、锻造等)、机械加工、焊接、热处理、表面涂覆、上下料、装配、检测及仓库堆垛等作业中，机器人都已逐步取代了人工作业。
目前汽车制造业是所有行业中人均拥有机器人密度最高的行业，如2004年德国制造业中每1万名工人中拥有机器人的数量为162台，而在汽车制造业中每1万名工人中拥有机器人的数量则为1140台；
意大利的这一数值更能说明问题，2004年意大利制造业中每1万名工人中拥有辅助操作的机器人数量为123台，而在汽车制造业中每1万名工人中机器人的拥有数量则高达1600台。

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。