BS ISO 8127-2-1999 缩微摄影技术.A6尺寸缩微胶卷封套.16mm和35mm缩微胶卷用的其它类型的胶卷封套
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【英文标准名称】:Micrographics.A6sizemicrofilmjackets.Othertypesofjacketfor16mmand35mmmicrofilm
【原文标准名称】:缩微摄影技术.A6尺寸缩微胶卷封套.16mm和35mm缩微胶卷用的其它类型的胶卷封套
【标准号】:BSISO8127-2-1999
【标准状态】:现行
【国别】:英国
【发布日期】:1999-11-15
【实施或试行日期】:1999-11-15
【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】:曲率;彼此间隔的;储藏设备;平行;尺寸公差;缩微胶卷;四方形;缩微品;尺寸;尺寸;文献存储设备;材料的光学性质;孔;宽度;直径;性能试验
【英文主题词】:Curvature;Diameter;Dimensionaltolerances;Dimensions;Documentstoragedevices;Holes;Microfilm;Microfilmjackets;Microforms;Micrographics;Opticalpropertiesofmaterials;Parallel;Performancetesting;Physicalproperties;Size;Spaced;Specification(approval);Squareshape;Storageequipment;Testing;Width
【摘要】:ThispartofISO8127specifiesthecharacteristicsoffourchanneljacketsfor16mmmicrofilm,twochanneljacketsfor35mmmicrofilm,one35mmandthree16mmchanneljacketsandtwo35mmandone16mmchanneljackets.
【中国标准分类号】:A14
【国际标准分类号】:37_080
【页数】:16P.;A4
【正文语种】:英语
【英文标准名称】:Ceramictiles.Determinationofwaterabsorption.
【原文标准名称】:瓷砖.吸水性测定.(欧洲标准EN99)
【标准号】:NFP61-502-1991
【标准状态】:现行
【国别】:法国
【发布日期】:1991-11-01
【实施或试行日期】:1991-11-05
【发布单位】:法国标准化协会(FR-AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:板材;体密度;施工材料;板;吸水率;松散材料密度;地板覆盖物;吸水能力;墙面饰层;试验;面砖;建筑;孔隙率;陶瓷;陶瓷;墙面涂层;瓷砖
【英文主题词】:boards;constructionmaterials;ceramic;waterabsorption;wallcoatings;ceramics;wallcoverings;ceramictiles;floorcoverings;porosity;absorptivecapacityforwater;tiles;plates;bulkdensity;testing;construction
【摘要】:
【中国标准分类号】:Q31
【国际标准分类号】:91_100_25
【页数】:4P.;A4
【正文语种】:其他
【英文标准名称】:StandardPracticeforDeterminingContrastSensitivityinRadioscopy
【原文标准名称】:射线检查法中对比灵敏度测定的标准实施规范
【标准号】:ASTME1647-2003
【标准状态】:现行
【国别】:
【发布日期】:2003
【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】:E07.01
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:图像质量;图像质量指示器;直线;γ辐射;射线检查;放射性照射;辐照;试验
【英文主题词】:contrastsensitivitygage;gammaray;imageformation;imageprocessing;imagequalityindicator;line-pairspermillimeter;penetratingradiation;spatialresolution;X-ray
【摘要】:Thecontrastsensitivitygagemeasurescontrastsensitivityindependentoftheimagingsystemspatialresolutionlimitations.Thethicknessrecessdimensionsofthecontrastsensitivitygagearelargewithrespecttothespatialresolutionlimitationsofmostimagingsystems.Fourlevelsofcontrastsensitivityaremeasured:4%,3%,2%,and1%.Thecontrastsensitivitygageisintendedforuseinconjunctionwithahigh-contrastresolutionmeasuringgage,suchastheEN462x2013;5DuplexWireImageQualityIndicator.Suchgagesmeasurespatialresolutionessentiallyindependentoftheimagingsystem’contrastsensitivity.Suchmeasurementsareappropriateforthequalificationandperformancemonitoringofradiographicandradioscopicimagingsystems.Radioscopic/radiographicsystemperformancemaybespecifiedbycombiningthemeasuredcontrastsensitivityexpressedasapercentagewiththespatialresolutionexpressedinmillimetersofunsharpness.FortheEN462x2013;5spatialresolutiongage,theunsharpnessisequaltotwicethewirediameter.Forthelinepairgage,theunsharpnessisequaltothereciprocaloftheline-pair/mmvalue.Asanexample,animagingsystemthatexhibits2%contrastsensitivityandimagesthe0.1mmEN462x2013;5pairedwires(equivalenttoimaging5line-pairs/millimeterresolutiononaline-pairgage)performsata2%x2013;0.2mmsensitivitylevel.AstandardmethodofevaluatingoverallradioscopicsystemperformanceisgiveninPracticeE1411andinEN13068x2013;1.1.1Thispracticecoversthedesignandmaterialselectionofacontrastsensitivitymeasuringgageusedtodeterminetheminimumchangeinmaterialthicknessordensitythatmaybeimagedwithoutregardtospatialresolutionlimitations.1.2Thispracticeisapplicabletotransmitted-beamradiographicandradioscopicimagingsystemsutilizingX-rayandgammarayradiationsources.1.3Thevaluesstatedininch-poundunitsaretoberegardedasstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecificsafetystatements,seeNIST/ANSIHandbook114Section8,CodeofFederalRegulations21CFR1020.40and29CFR1910.96.
【中国标准分类号】:C43
【国际标准分类号】:
【页数】:5P.;A4
【正文语种】:
