NF E49-080-2/A1-2004 气压传动.五通定向控制阀.第2部分:带可选电接头的安装接口表面
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【英文标准名称】:Pneumaticfluidpower-Five-portdirectionalcontrolvalves-Part2:mountinginterfacesurfaceswithoptionalelectricalconnector.
【原文标准名称】:气压传动.五通定向控制阀.第2部分:带可选电接头的安装接口表面
【标准号】:NFE49-080-2/A1-2004
【标准状态】:现行
【国别】:法国
【发布日期】:2004-12-01
【实施或试行日期】:2004-12-20
【发布单位】:法国标准化协会(AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:规范;电连接器;定义;气动力学;阀门;连接;流体技术;方向控制阀;名称与符号;尺寸;气动设备;基座;气动传动系统
【英文主题词】:
【摘要】:
【中国标准分类号】:J20
【国际标准分类号】:23_100_50
【页数】:5P;A4
【正文语种】:其他
【英文标准名称】:StandardGuideforDigitalCommunicationProtocolsforComputerizedSystems
【原文标准名称】:计算机系统数字通讯协议的标准指南
【标准号】:ASTMF1757-1996(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:1996
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:F25.05
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:
【英文主题词】:bus;internetwork;localareanetwork(LAN);networkoperatingsystem(NOS);operatingsystem(OS);protocol;ring;star;topology;tree;wideareanetwork(WAN);Communications(marine(shipboard)applications;Computerizedsystems;Digitalcommunication
【摘要】:Thisguideisintendedtoprovideanunderstandingofthewiderangeofcommunicationprotocolsstandards,allowingtheusertounderstandbettertheirapplicabilitytoshipboardnetworksandmarineplatformcomputerizedsystems.Forcomputerizednetworksandsystems,communicationprotocolsarenecessaryforintegratingvarioussystemdevices,providingfunctionalitybetweendissimilarsubnetworks,orforenablingremoteconnections,eitherpiersideorthroughgeophysicalcommunicationtechnologies.Thewidevarietyandscopeofdigitalcommunicationprotocolstandardsaddsgreatlytothecomplexdecisionprocessforspecifyingcompatibleprotocolsforsystemapplicationsandrelateddevicesforthemyriadofpotentialshipboardsystems.However,theusermustidentifytheinitialnetworkingrequirements,sooncethenetworkprotocolsunderevaluationarewellunderstood,thedecisionprocessshoulddeterminetheappropriatenetworkprotocols.Therefore,thisguideisintendedtoreducethecomplexityinvolvedwithprotocolselectionandimplementation.Networkprotocolsdefineanagreed,quantifiableentity,orsetofrules,bywhichusercomputers,systemnetworks,andinternetworkingdevicescommunicateandexchangeinformation.Communicationprotocolsspecifyessentialnetworkingguidelines,suchasphysicalinterfaceconnections,ordataformatandcontroloperationsbetweentwocommunicatingcomputers.Shipandmarinedigitalcommunicationprotocolrequirementsarenodifferentthantheirland-basednetworkedcounterparts.Bothrequirestandardizedprotocolselection,invariousprotocolcategories,includingLANstandards,WANprotocols,LAN/WANprotocols,networkmanagement,wiringhubconfigurations/operations,hardwareplatforms,operatingsystems,andnetworkapplications.1.1Theprincipalcontentofthisguideprovidesaroadmaptoimplementacommunicationnetworkapplicabletoshipandmarinecomputersystemsby:1.1.1Examiningtherelationshipofdigitalcommunicationprotocolsasanetworktechnologicalinfrastructure,1.1.2Outliningthebasicbuildingblocksofnetworktopologiesandtransmissiontechniquesassociatedwiththeimplementationoftransmissionmediainanetworkenvironment;and,1.1.3Identifyingoperatingsystemandenvironments.1.2UsingtheOpenSystemInterconnection(OSI)model,whichprovidesalayeredapproachtonetworkfunctionalityandevaluation,commonnetworkcommunicationsprotocolsareidentifiedandcharacterizedinthisguideaccordingtolowerandupperlayerprotocolscorrespondingtotheirdegreeandtypeoffunctionality.1.3Althoughitisdesirablethatnetworkusers,designers,andadministratorsrecognizeandunderstandeverypossiblenetworkingprotocol,itisnotpossibletoknowtheintimatedetailsofeveryprotocolspecification.Accordingly,thisguideisnotintendedtoaddressfullyeveryhardwareandsoftwareprotocoleverdevelopedforcommercialuse,whichspansaperiodofabout25years.Instead,theuserofthisguidewillbeintroducedtoabriefoverviewofthemajorityofpastandpresentprotocolswhichmaycompriseashipormarineinternetwork,toincludeLocalAreaNetworks(LANs),WideAreaNetworks(WANs),andrelatedhardwareandsoftwarethatprovidesuchnetworkinteroperabilityanddatatransfer.1.4Whilethisguideprovidesanunderstandingofthewiderangeofcommunicationprotocols,theuserisrecommendedtoconsultthereferencematerialforacquiringamorecomprehensiveunderstandingofindividualcommunicationprotocols.However,byexaminingthebasicfunctionsofprotocolsandreviewingtheprotocolcharacterizationcriteriaidentifiedinthisguide,theuserwillbemoreapttounderstandingother......
【中国标准分类号】:L60
【国际标准分类号】:35_100_30
【页数】:14P.;A4
【正文语种】:英语
【英文标准名称】:Playingfieldequipment-Volleyballequipment-Functionalandsafetyrequirement,testmethods
【原文标准名称】:运动场设备.排球设备.功能和安全性要求、试验方法
【标准号】:BSEN1271-1998
【标准状态】:作废
【国别】:英国
【发布日期】:1998-09-15
【实施或试行日期】:1998-09-15
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:设计;断裂荷载;性能;基础;球(体育器材);球类设备;分类系统;锚具;安全措施;纱;机械试验;作标记;软索;使用说明;网(体育器材);等级(质量);尺寸
【英文主题词】:
【摘要】:
【中国标准分类号】:Y55
【国际标准分类号】:97_220_30
【页数】:10P;A4
【正文语种】:英语