【英文标准名称】:StandardTestMethodforSpecularGloss
【原文标准名称】:镜面光泽度的标准试验方法
【标准号】:ASTMD523-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:E12.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:appearance;directionalreflectancefactor;gloss;goniophotometry;highgloss;relativeluminousreflectancefactor;speculargloss;Appearanceofmaterials;Directionalreflectance;Gloss;Goniophotometry;High-glosssurfaces;Latexpaints;Relativelu
【摘要】:Glossisassociatedwiththecapacityofasurfacetoreflectmorelightindirectionsclosetothespecularthaninothers.Measurementsbythistestmethodcorrelatewithvisualobservationsofsurfaceshininessmadeatroughlythecorrespondingangles.Measuredglossratingsbythistestmethodareobtainedbycomparingthespecularreflectancefromthespecimentothatfromablackglassstandard.Sincespecularreflectancedependsalsoonthesurfacerefractiveindexofthespecimen,themeasuredglossratingschangeasthesurfacerefractiveindexchanges.Inobtainingthevisualglossratings,however,itiscustomarytocomparethespecularreflectancesoftwospecimenshavingsimilarsurfacerefractiveindices.Othervisualaspectsofsurfaceappearance,suchasdistinctnessofreflectedimages,reflectionhaze,andtexture,arefrequentlyinvolvedintheassessmentofgloss(1),(6),(7).TestMethodE430includestechniquesforthemeasurementofbothdistinctness-of-imageglossandreflectionhaze.TestMethodD4039providesanalternativeprocedureformeasuringreflectionhaze.Littleinformationabouttherelationofnumerical-to-perceptualintervalsofspecularglosshasbeenpublished.However,inmanyapplicationstheglossscalesofthistestmethodhaveprovidedinstrumentalscalingofcoatedspecimensthathaveagreedwellwithvisualscaling(10).Whenspecimensdifferingwidelyinperceivedglossorcolor,orboth,arecompared,nonlinearitymaybeencounteredintherelationshipbetweenvisualglossdifferenceratingsandinstrumentalglossreadingdifferences.1.1Thistestmethodcoversthemeasurementofthespecularglossofnonmetallicspecimensforglossmetergeometriesof60,20,and85x00B0;(1-7).1.2Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Y89
【国际标准分类号】:83_140_01
【页数】:5P.;A4
【正文语种】:英语


【英文标准名称】:NodeApplicationLayerSpecification
【原文标准名称】:结点应用层规范
【标准号】:ANSI/EIA-721.3-1999
【标准状态】:作废
【国别】:美国
【发布日期】:1999
【实施或试行日期】:
【发布单位】:美国国家标准学会(ANSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:程序设计语言;信息技术;应用层;规范
【英文主题词】:applicationlayer;informationtechnology;specification;programminglanguages
【摘要】:
【中国标准分类号】:M11
【国际标准分类号】:35_100_70;35_060
【页数】:
【正文语种】:英语