【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


【英文标准名称】:Respiratoryprotectivedevices.Classification
【原文标准名称】:呼吸器官保护装置.分类
【标准号】:BSEN133-1991
【标准状态】:作废
【国别】:英国
【发布日期】:1991-06-28
【实施或试行日期】:1991-06-28
【发布单位】:英国标准学会(BSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:空气过滤器;供气呼吸装置;过滤机;工作环境;呼吸装置;滤清器;过滤器;空气;面具(防护工作服);呼吸器;分类系统
【英文主题词】:filters;air;environment(working);masks(protectiveclothing);respirators;airfilters;classificationsystems;breathingapparatus;suppliedairbreathingapparatus
【摘要】:
【中国标准分类号】:C85
【国际标准分类号】:13_340_30
【页数】:12P;A4
【正文语种】:英语