【英文标准名称】:TransmissionandMultiplexing(TM)-Genericrequirementsfortransportfunctionalityofequipment-Part2-1:SynchronousDigitalHierarchy(SDH)andPlesiochronousDigitalHierarchy(PDH)physicalsectionlayerfunctions;EnglishversionETS300417-2-1:
【原文标准名称】:传输和多路传送技术(TM).设备用一般传送功能的要求.第2=1部分:同步数字分级结构(SDN)和相近数字分级结构用位传送接口层
【标准号】:DINETS300417-2-1-1998
【标准状态】:作废
【国别】:德国
【发布日期】:1998-02
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:物理层;同步的;传输特性;数字信号;传输系统;电气工程;分级结构;用户;传输技术;无线电工程;多路传送;接口(数据加工);规范(验收);电信;电信
【英文主题词】:
【摘要】:
【中国标准分类号】:M19
【国际标准分类号】:33_040_20
【页数】:114P;A4
【正文语种】:德语


【英文标准名称】:Uncertaintyofmeasurement—Part1:Introductiontotheexpressionofuncertaintyinmeasurement
【原文标准名称】:测量不确定度.第1部分:测量中不确定度的表示介绍
【标准号】:ISO/IECGUIDE98-1-2009
【标准状态】:现行
【国别】:国际
【发布日期】:2009
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:TheJointCommitteeforGuidesinMetrology(JCGM)haspreparedthisdocumenttopromotethesoundevaluationofmeasurementuncertaintythroughtheuseoftheGUM(seeclause2)andtoprovideanintroduc-tiontotheGUMSupplementsandotherdocumentsJCGMisproducing:JCGM101:2008(seeclause2)andreferences[3,4,5,6,7].AsintheGUM,thisdocumentisprimarilyconcernedwiththeexpressionofuncertaintyrelatingtothemea-surementofawell-denedquantity|themeasurand[JCGM200:2008(VIM)2.3]|thatcanbecharacterizedbyanessentiallyuniquetruevalue[JCGM200:2008(VIM)2.11NOTE3].TheGUMprovidesarationalefornotusingtheterm`true',butthistermwillbekeptinthisdocumentwhenthereisotherwiseapossibilityforambiguityorconfusion.ThepurposeoftheGUMSupplementsandtheotherdocumentsproducedbytheJCGMistohelpwiththeinterpretationoftheGUMandenhanceitsapplication.TheGUMSupplementsandtheotherdocumentsaretogetherintendedtohaveascopethatisconsiderablybroaderthanthatoftheGUM.Thisdocumentintroducesmeasurementuncertainty,theGUM,andtheGUMSupplementsandotherdocumentsthatsupporttheGUM.Itisdirectedpredominantlyatthemeasurementofquantitiesthatcanbecharacterizedbycontinuousvariablessuchaslength,temperature,time,andamountofsubstance.Thisintroductorydocumentisaimedatthefollowing,includingbutnotlimitedto|scienticactivitiesanddisciplinesingeneral,|industrialactivitiesanddisciplinesingeneral,|calibration,testingandinspectionlaboratoriesinindustry,andlaboratoriessuchasthoseconcernedwithhealth,safetyandenvironment,and|evaluationandaccreditationbodies.Itishopedthatitwillalsobeusefultodesigners,becauseaproductspecicationthattakesbetteraccountofinspectionrequirements(andtheassociatedmeasurement)canresultinlessstringentmanufacturingrequire-ments.Itisalsodirectedatacademia,withthehopethatmoreuniversitydepartmentswillincludemodulesonmeasurementuncertaintyevaluationintheircourses.Asaresult,anewgenerationofstudentswouldbebetterarmedtounderstandandprovideuncertaintystatementsassociatedwithmeasuredquantityvalues,andthusgainanimprovedappreciationofmeasurement.Thisintroductorydocument,theGUM,theGUMSupplementsandtheotherdocumentsshouldbeusedincon-junctionwiththe`InternationalVocabularyofMetrology|Basicandgeneralconceptsandassociatedterms'andallthreepartsofISO3534citedinclause2,whichdenestatisticalterms(usedinstatisticsandproba-bility,includingappliedstatisticsanddesignofexperiments),andexpresstheminaconceptualframeworkinaccordancewithnormativeterminologypractice.Thelastconsiderationrelatestothefactthatthetheoreticalbackgroundofevaluationofmeasurementdataandevaluationoftheuncertaintyofmeasurementissupportedbymathematicalstatisticsandprobability.
【中国标准分类号】:A50
【国际标准分类号】:17_020
【页数】:32P.;A4
【正文语种】:英语