JIS K7542-1993 电子扫描器用摄影胶片尺寸
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【英文标准名称】:Dimensionsofphotographicfilmforelectronicscanneruse
【原文标准名称】:电子扫描器用摄影胶片尺寸
【标准号】:JISK7542-1993
【标准状态】:作废
【国别】:日本
【发布日期】:1993-10-01
【实施或试行日期】:
【发布单位】:日本工业标准调查会(JISC)
【起草单位】:ConsumerLife
【标准类型】:()
【标准水平】:()
【中文主题词】:摄影胶片规格;扫描器(计算机);摄影胶片;彩色摄影胶片;尺寸;电子工程;印刷材料;尺寸公差
【英文主题词】:scanners(computers);;photographicfilm;photographicfilmformat;printingmaterials;colourphotographicfilm;dimensions;dimensionaltolerances
【摘要】:
【中国标准分类号】:G81
【国际标准分类号】:37_040_20
【页数】:12P;A4
【正文语种】:日语
【英文标准名称】:StandardTestMethodforPredictingLong-TermThermalResistanceofClosed-CellFoamInsulation
【原文标准名称】:预测闭孔绝缘泡沫的长期热电阻的标准试验方法
【标准号】:ASTMC1303/C1303M-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【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】:C16.30
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:aging;long-termthermalresistance;LTTR;rigidclosed-cellplasticfoams;scalingfactors;thermalinsulation;thermalresistance;time-averagedthermalresistance;Agingresistance;Controlledtestingconditions/environments;Foamed-in-placethermalin
【摘要】:Rigidgas-filledclosed-cellfoaminsulationsincludeallcellularplasticinsulationswhichrelyonablowingagent(orgas),otherthanair,forthermalresistancevalues.Atthetimeofmanufacture,thecellsofthefoamusuallycontaintheirhighestpercentageofblowingagentandthelowestpercentageofatmosphericgases.Astimepasses,therelativeconcentrationsofthesegaseschangedueprimarilytodiffusion.Thisresultsinageneralreductionofthethermalresistanceofthefoamduetoanincreaseinthethermalconductivityoftheresultantcellgasmixture.Thesephenomenaaretypicallyreferredtoasfoamaging.Forsomerigidgas-filledclosed-cellfoaminsulationproductsproducedusingblowingagentgasesthatdiffuseveryrapidlyoutofthefull-thicknessfoamproduct,suchasexpandedpolystyrene,thereisnoneedtoacceleratetheagingprocess.5.1.2Physicalgasdiffusionphenomenaoccurinthreedimensions.Theone-dimensionalformofthediffusionequationsusedinthedevelopmentofthispracticearevalidonlyforplanargeometries,thatis,forspecimensthathaveparallelfacesandwherethethicknessismuchsmallerthanthewidthandmuchsmallerthanthelength.Note28212;PleaseseeAppendixX3foradiscussionofthetheoryofacceleratedagingviathinslicing.Note38212;Theoreticalandexperimentalevaluationsoftheagingofinsulationinradialforms,suchaspipeinsulation,havebeenmade.(6)However,thesepracticeshavenotevolvedtothepointofinclusionintheteststandard.Thechangeinthermalresistanceduetothephenomenadescribedin5.1usuallyoccursoveranextendedperiodoftime.Informationregardingchangesinthethermalresistanceofthesematerialsasafunctionoftimeisrequiredinashorterperiodoftimesothatdecisionsregardingformulations,production,andcomparisonswithothermaterialscanbemade.SpecificationsC578,C591,C1029,C1126andC1289onrigidclosed-cellfoamsmeasurethermalresistanceafterconditioningat23x00B1;1x00B0;C[73x00B1;2x00B0;F]for180x00B1;5daysfromthetimeofmanufactureorat60x00B1;1x00B0;C[140x00B1;2x00B0;F]for90days.Thisconditioningcanbeusedforcomparativepurposes,butisnotsufficienttodescribelong-termthermalresistance.Thisrequirementdemonstratestheimportanceoftheagingphenomenawithinthisclassofproducts.ThePrescriptiveMethodinPartAprovideslong-termthermalresistancevaluesonaconsistentbasisforavarietyofpurposes,includingproductevaluation,specifications,orproductcomparisons.Theconsistentbasisforthesepurposesisprovidedbyaseriesofspecificproceduralconstraints,whicharenotrequiredintheResearchMethoddescribedinPartB.ThevaluesproducedbythePrescriptiveMethodcorrespondtothethermalresistanceatanageoffiveyears,whichcorrespondscloselytotheaveragethermalresistanceovera15-yearservicelife(7,8).Itisrecommendedthatanymaterialstan......【英文标准名称】:RecommendedPracticeforPartialDischargeMeasurementinLiquid-FilledPowerTransformersandShuntReactors
【原文标准名称】:充液电力变压器和并联电抗器局部放电测量的推荐实施规程
【标准号】:ANSI/IEEEC57.113-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【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】:放电;电气工程;测量技术;局部放电;电力变压器;变压器
【英文主题词】:Discharge;Electricalengineering;Measuringtechniques;Partialdischarges;Powertransformers;Transformers
【摘要】:Partialdischargemeasurementsintransformersandshuntreactorsshouldpreferablybemadeonthebasisofmeasurementoftheapparentcharge.Relevantmeasuringsystemsareclassifiedasnarrow-bandorwide-bandsystems.Bothsystemsarerecognizedandwidelyused.Withoutgivingpreferencetooneortheother,itistheobjectofthisdocumenttodescribethewide-bandmethod.
【中国标准分类号】:K41
【国际标准分类号】:29_180
【页数】:
【正文语种】:英语
