【英文标准名称】:Informationtechnology-OpenSystemsInterconnection-TheDirectory:Overviewofconcepts,modelsandservices
【原文标准名称】:信息技术.开放系统互连.目录:概念、模型和服务综述
【标准号】:ISO/IEC9594-1-2005
【标准状态】:作废
【国别】:国际
【发布日期】:2005-12
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/IECJTC1/SC6
【标准类型】:()
【标准水平】:()
【中文主题词】:应用层;电信设备;数据网络;定义;人名地址录;信息交换;信息技术;电力网供电;网络互连;开放系统互连;电信
【英文主题词】:Applicationlayer;Communicationservice;Datanetwork;Definitions;Directories;Informationinterchange;Informationtechnology;Mainspowersupply;Networkinterconnection;Opensystemsinterconnection;OSI;Telecommunication;Telecommunications
【摘要】:TheDirectoryprovidesthedirectorycapabilitiesrequiredbyOSIapplications,OSImanagementprocesses,otherOSIlayerentities,andtelecommunicationsservices.Amongthecapabilitieswhichitprovidesarethoseof"user-friendlynaming",wherebyobjectscanbereferredtobynameswhicharesuitableforcitingbyhumanusers(thoughnotallobjectsneedhaveuser-friendlynames);and"name-to-addressmapping"whichallowsthebindingbetweenobjectsandtheirlocationstobedynamic.ThelattercapabilityallowsOSInetworks,forexample,tobe"self-configuring"inthesensethataddition,removalandthechangesofobjectlocationdonotaffectOSInetworkoperation.TheDirectoryisnotintendedtobeageneral-purposedatabasesystem,althoughitmaybebuiltonsuchsystems.Itisassumed,forinstance,that,asistypicalwithcommunicationsdirectories,thereisaconsiderablyhigherfrequencyof"queries"thanofupdates.Therateofupdatesisexpectedtobegovernedbythedynamicsofpeopleandorganizations,ratherthan,forexample,thedynamicsofnetworks.Thereisalsononeedforinstantaneousglobalcommitmentofupdates;transientconditions,wherebotholdandnewversionsofthesameinformationareavailable,arequiteacceptable.ItisacharacteristicoftheDirectorythat,exceptasaconsequenceofdifferingaccessrightsorunpropagatedupdates,theresultsofdirectoryquerieswillnotbedependentontheidentityorlocationoftheinquirer.ThischaracteristicrenderstheDirectoryunsuitableforsometelecommunicationsapplications,forexamplesometypesofrouting.Forcaseswheretheresultsaredependentontheidentityoftheinquirer,accesstodirectoryinformationandupdatesoftheDirectorymaybedenied.
【中国标准分类号】:L79
【国际标准分类号】:35_100_70
【页数】:24P.;A4
【正文语种】:英语


【英文标准名称】:Electricalstrengthofinsulatingmaterials-Testmethods-Part1:Testatpowerfrequencies(IEC60243-1:1998);GermanversionEN60243-1:1998
【原文标准名称】:绝缘材料的电气击穿强度.试验方法.第1部分:动力频率试验
【标准号】:EN60243-1-1998
【标准状态】:现行
【国别】:
【发布日期】:1999-03
【实施或试行日期】:1999-03-01
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:脉冲电压;塑料;测定;脉冲电压试验;电绝缘材料;试验;定义;固体绝缘材料;绝缘材料;材料;材料强度;电气工程;击穿电压;频率
【英文主题词】:Acceleratedtesting;Breakdownvoltage;Definition;Definitions;Determination;Dielectricstrength;Dielectric-strengthtests;Electricstrength;Electricalcomponents;Electricalengineering;Electricalinsulatingmaterials;Electricalinsulation;Electricaltesting;Electrodes;Frequencies;Frequencyranges;Impulsevoltages;Impulse-voltagetests;Insulatingmaterials;Lightningsurgevoltages;Materials;Plastics;Powerfrequency;Solidelectricalinsulatingmaterials;Strengthofmaterials;Testreports;Testspecimens;Testing
【摘要】:
【中国标准分类号】:K15
【国际标准分类号】:29_035_01
【页数】:24P.;A4
【正文语种】:英语