ANSI/INCITS/ISO/IEC 9541-2AMD 2-2009 信息技术.字体信息交换.第2部分:交换格式.修改件2:字体基准的扩展
时间:2024-05-17 02:13:01 来源: 标准资料网 作者：标准资料网 阅读：8516
【英文标准名称】:Informationtechnology-Fontinformationinterchange-Part2:Interchangeformat-AMENDMENT2:Extensiontofontreference
【原文标准名称】:信息技术.字体信息交换.第2部分:交换格式.修改件2:字体基准的扩展
【标准号】:ANSI/INCITS/ISO/IEC9541-2AMD2-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:字母数字字符集;字符集;字符子集;数据处理;交换格式;信息交流;信息交换;信息处理;字符表示;文本处理
【英文主题词】:Alphanumericcharactersets;Charactersets;Charactersubsets;Dataprocessing;Exchangeformats;Informationexchange;Informationinterchange;Informationprocessing;Representationofcharacters;Textprocessings
【摘要】:
【中国标准分类号】:L71
【国际标准分类号】:35_040;35_240_20
【页数】:
【正文语种】:英语
【英文标准名称】:Respiratoryprotectivedevices-Halfmaskswithoutinhalationvalvesandwithseparablefilterstoprotectagainstgasesorgasesandparticlesorparticlesonly-Requirements,testing,marking(includesAmendmentA1:2009);EnglishversionofDINEN1827:
【原文标准名称】:呼吸保护装置.无吸气阀式带分离式过滤器适用于防护气体和微粒吸入或仅适用于防护微粒的吸入要求,测试,标记,德国版本EN1827:1999+A1:2009
【标准号】:EN1827-2009
【标准状态】:现行
【国别】:
【发布日期】:2009-11
【实施或试行日期】:
【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】:
【英文主题词】:Accidentprevention;Breathingapparatus;Classification;Designations;Filters;Finemechanics;Halfmasks;Healthprotection;Inhalingvolve;Marking;Masks;Materials;Occupationalsafety;Particles;Performancerequirements;Protectingmasks;Protectionagainstpoisonousgas;Protectiveclothing;Respirators;Re-usable;Specification(approval);Testing;Valves
【摘要】:
【中国标准分类号】:C73
【国际标准分类号】:13_340_30
【页数】:46P.;A4
【正文语种】:英语
【英文标准名称】:Reliabilitydataanalysistechniques-Proceduresforcomparisonoftwoconstantfailureratesandtwoconstantfailure(event)intensities
【原文标准名称】:可靠性数据分析技术两种恒定失效率和两种恒定失效(事件)密度的比较程序
【标准号】:IEC61650-1997
【标准状态】:现行
【国别】:国际
【发布日期】:1997-08
【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/TC56
【标准类型】:()
【标准水平】:()
【中文主题词】:衰弱率;失败分析;电气工程;可靠性管理;数据分析;比较;可靠性分析;数学计算
【英文主题词】:Comparison;Dataanalysis;Electricalengineering;Failureanalysis;Failurerates;Mathematicalcalculations;Reliabilityanalysis;Reliabilitymanagement
【摘要】:ThisInternationalStandardspecifiesprocedurestocomparetwoobserved-failurerates;-failureintensities;-rates/intensitiesofrelevantevents.Theproceduresareusedtodeterminewhetheranapparentdifferencebetweenthetwosetsofobservationscanbeconsideredstatisticallysignificant.Itisassumedthatthetimeintervalsto/betweenthefailures(events)areindependentandidenticallyexponentiallydistributedduringtheobservationperiod(thatis,theaccumulatedrelevanttesttime).NOTE-Thisassumptionimpliesthatthefailurerate/intensityisconstant.Itisfurthermoreassumedthattherearetechnicalorotherreasonstobelievethatadifference(eitheranimprovementordeterioration)mightexistbetweentheobservedreliabilitycharacteristicofthetwosetsofitemsundercomparison.Someexamplesoftypicalapplicationsaredescribedin5.4.Themethodsaredesignedashypothesistestswhichstate,withaspecifiedrisk(thesignificancelevel),whetherthetwoseriesofobservationsbelongtothesamepopulationorthesameprocess,thatistheyhavethesametruemeanvalue.NOTE-Failurerate,whichisrelevanttonon-repaireditems,isassociatedwithadistributionoftimestofailure.Failureintensity,whichisrelevanttorepaireditemsonly,isassociatedwithapointprocessdescribingase-quenceofevents,forexampletimesbetweenfailuresonatimeaxis.Theproceduresarenotrestrictedtocomparisonoffailurerate/intensity,butcanbeappliedtoobservationsoftwoseriesofanyrelevantevents,providedtheaboveassumptionsarevalid.NOTE-Thetwoseriesofobservationsmaybeofitemsfromthesamepopulation,orthesameitemunderdifferentconditions(forexampleenvironmentandload),orjustcomparableseriesofevents(forexamplecaraccidentsonaroad).Numericalmethodsandagraphicalprocedureareprescribed.Theobservationperiodsrelevanttothetwoseriesdonotneedtobeequal,butiftheyare,themethodsareverysimple.
【中国标准分类号】:A00
【国际标准分类号】:03_120_01
【页数】:39P.;A4
【正文语种】:英语