NF P98-661-1997 道路标识材料.预混玻璃珠
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【英文标准名称】:Roadmarkingmaterials.Premixglassbeads.
【原文标准名称】:道路标识材料.预混玻璃珠
【标准号】:NFP98-661-1997
【标准状态】:现行
【国别】:法国
【发布日期】:1997-11-01
【实施或试行日期】:1997-11-05
【发布单位】:法国标准化协会(AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:实验室试验;定义;定义;道路建筑;过程控制室;折射指数;表面处理;耐化学性;规范(验收);;;公路建设;建筑;道路;表面;标志;粒度;试验;作标记;玻璃珠;性能试验;玻璃;材料;耐力
【英文主题词】:
【摘要】:
【中国标准分类号】:P66
【国际标准分类号】:93_080_20
【页数】:9P;A4
【正文语种】:其他
MIL-R-7575C, MILITARY SPECIFICATION: RESIN, POLYESTER, LOW-PRESSURE LAMINATING (29 JUN 1966)., This specification covers the requirements for low-pressure laminating polyester resins used in fabricating glass fabric-based plastic laminates for various applications.【英文标准名称】:Opticalfibres-Measurementmethodsandtestprocedures-Gammairradiation
【原文标准名称】:光纤.测量方法和试验规程.γ辐射
【标准号】:BSEN60793-1-54-2003
【标准状态】:现行
【国别】:英国
【发布日期】:2003-11-25
【实施或试行日期】:2003-11-25
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:阻尼(波);尺寸规格;电插头;电气工程;电子工程;电子设备及元件;光纤;γ辐射;实验室试验;数学计算;测量;测量技术;光波导;特性;辐射;放射性;抽样方法;规范;试样;试验;测试装置
【英文主题词】:Damping;Dimensions;Electricplugs;Electricalengineering;Electronicengineering;Electronicequipmentandcomponents;Fibreoptics;Gamma-radiation;Laboratorytests;Mathematicalcalculations;Measurement;Measuringtechniques;Opticalwaveguides;Properties;Radiation;Radioactivity;Samplingmethods;Specification;Testspecimens;Testing;Testingdevices
【摘要】:ThispartofIEC60793outlinesamethodformeasuringthesteadystateresponseofopticalfibresandopticalcablesexposedtogammaradiation.Itcanbeemployedtodeterminethelevelofradiation-inducedattenuationproducedinsingle-modeormultimodeopticalfibres,ineithercabledoruncabledform,duetoexposuretogammaradiation.Theattenuationofcabledanduncabledopticalfibresgenerallyincreaseswhenexposedtogammaradiation.Thisisprimarilyduetothetrappingofradiolyticelectronsandholesatdefectsitesintheglass(i.e.theformationof"colourcenters").Thistestprocedurefocusesontworegimesofinterest:thelowdoserateregimesuitableforestimatingtheeffectofenvironmentalbackgroundradiation,andthehighdoserateregimesuitableforestimatingtheeffectofadversenuclearenvironments.ThetestingoftheeffectsofenvironmentalbackgroundradiationisachievedwithanattenuationmeasurementapproachsimilartomethodIEC60793-1-40A,cut-back.Theeffectsofadversenuclearenvironmentsaretestedbymonitoringthepowerbefore,duringandafterexposureofthetestsampletogammaradiation.Thedepopulationofcolorcentersbylight(photobleaching)orbyheatcausesrecovery(lesseningofradiationinducedattenuation).Recoverymayoccuroverawiderangeoftimewhichdependsontheirradiationtime.Thiscomplicatesthecharacterizationofradiationinducedattenuationsincetheattenuationdependsonmanyvariablesincludingthetemperatureofthetestenvironment,theconfigurationofthesample,thetotaldoseandthedoserateappliedtothesampleandthelightlevelusedtomeasureit.Thistestisnotamaterialtestforthenon-opticalmaterialcomponentsofafibreopticcable.Ifdegradationofcablematerialsexposedtoirradiationistobestudied,othertestmethodswillberequired.NOTEBackgroundinformationonthissubjectisgiveninIEC/TR62283.Attentionisdrawntothefactthatstrictregulationsandsuitableprotectivefacilitiesareadoptedinthelaboratoryforthistest.Carefullyselectedtrainedpersonnelareusedtoperformthistest.Itcanbeextremelyhazardoustotestpersonnelifitisimproperlyperformedorwithoutqualifiedconditions.notel:1IEC62283,Nuclearradiation-Fibreopticguidance.
【中国标准分类号】:M33
【国际标准分类号】:33_180_10
【页数】:16P.;A4
【正文语种】:英语
