ASTM R0083 瓦楞纸板和硬质纸板的分层试验(湿法)(本文件不是ASTM标准,且仅提供PDF格式)
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【英文标准名称】:PlySeparationofSolidandCorrugatedFiberboard(Wet)(ThisisnotanASTMstandard;availableasPDF,only)
【原文标准名称】:瓦楞纸板和硬质纸板的分层试验(湿法)(本文件不是ASTM标准,且仅提供PDF格式)
【标准号】:ASTMR0083
【标准状态】:现行
【国别】:美国
【发布日期】:2005
【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】:
【标准类型】:(RelatedMaterials)
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:1.1Thismethoddescribesalaboratorytestforevaluatingtheresistancetoplyseparationofsolidorcorrugatedfiberboardafterexposuretowater.Itisintendedprimarilytodistinguishbetweenboardsfabricatedwithweather-resistantadhesivesan
【中国标准分类号】:
【国际标准分类号】:
【页数】:3P.;A4
【正文语种】:英语
【英文标准名称】:Distributionautomationusingdistributionlinecarriersystems-Part5-3:Lower-layerprofiles;Spreadspectrumadaptivewideband(SS-AW)profile
【原文标准名称】:使用分配线载波系统的分配自动化.第5-3部分:低层文件.扩展谱带适配的宽带截面
【标准号】:IEC/TS61334-5-3-2001
【标准状态】:现行
【国别】:国际
【发布日期】:2001-01
【实施或试行日期】:
【发布单位】:国际电工委员会(IEC)
【起草单位】:IEC/TC57
【标准类型】:()
【标准水平】:()
【中文主题词】:数据通信;传输协议;物理层;通信系统;遥控技术;网络控制系统;自动化;配线;数据传送;信息处理;轧制宽带材
【英文主题词】:
【摘要】:Thisspecificationdescribestherequirementsofthespreadspectrumadaptivewideband(SS-AW)approachwhichincorporatestheservicesprovidedbythephysicallayerentityandtheMACsublayer.ThetransmissionmediumisassumedtobethedistributionnetworkonboththeMVorLVlevel.TheMACsublayerdescribedinthisspecificationinterfaceswiththelogicallinkcontrol(LLC)layerdescribedinIEC61334-4-32.ThenoiseandsignalattenuationcharacteristicsoftheMVandLVnetworksrequireahierarchicalapproach,wheremethodsformodulation/demodulation,synchronization,equaliza-tion,errorcontrolcoding,andmediaaccesscontrolaredesignedspecificallyforthishostilecommunicationsenvironment.Thisapproachincludesalow-levellinkprotocolwithintheMACsublayerthatincorporatessomefunctionsgenerallyassociatedwithadatalinkcontrolprocedure.Thisspecificationdescribessuchahierarchicalapproachbasedonaspreadspectrumphysicallayerwithfastsynchronizationenablingshort-durationtransmissionsandadaptiveequalization.Thiscoupledwithalow-levellinkprotocol,theeffectiveutilizationoferrorcorrectionanddetection,androbustmediumaccessmanagementprovidesarobust,reliableplatformfortheLLCsublayer.Theadaptivecomponentofthisapproachreferstotheequalizationmethodusedtocompensateforthetime-varyingnatureofthecommunicationchannelimpairments.Thereceivermustselectappropriateequalizationvaluestoadapttothechangingchannelcharacteristics,whichcanbenode-specific,onaframebasistoachieveoptimalperformance.Theequalizationparametersareadjustedbasedonvariousqualitymetricsavailablefromthereceivedframe,forexample,theHammingdistanceofthesynchronizationpreamble,theerror-freestatusoftheframeheaderanddatablock,ifpresent,orthefailuretoreceiveanexpectedresponse.Theequalizationmethodsarewell-knownandtheprecisemethodisdeterminedbytheparticularimplementationofthisspecification.Thisallowscost/performancetrade-offsandfutureimprovementstooccurwithoutlosingcompatibility.
【中国标准分类号】:M11
【国际标准分类号】:33_040_60
【页数】:45P;A4
【正文语种】:英语
【英文标准名称】:Fibreopticfan-outs-Part1:Genericspecification
【原文标准名称】:纤维光学扇形输出器.第1部分:总规范
【标准号】:IEC61314-1-2005
【标准状态】:作废
【国别】:国际
【发布日期】:2005-06
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/SC86B
【标准类型】:()
【标准水平】:()
【中文主题词】:定义;分支电路;型式;检验;电气工程;规范(验收);评定;定型试验;认可;光波导;总规范;识别;纤维光学;分支器件;作标记;分支
【英文主题词】:Approval;Branchconduits;Branching;Branchingdevices;Definition;Definitions;Documentations;Electricalengineering;Equipmentsafety;Evaluations;Fibreoptics;Genericspecification;Identification;Inspection;Marking;Opticalwaveguides;Qualityassessment;Specification;Specification(approval);Typetesting;Types
【摘要】:Specifiesrequirementsforfan-outsusedinthefibreopticsfieldtoprovideasafetransitionfrommultifibrecableunitstoindividualfibresorcables.
【中国标准分类号】:M33
【国际标准分类号】:33_180_20
【页数】:58P;A4
【正文语种】:英语
