【英文标准名称】:CodeonNuclearAirandGasTreatment
【原文标准名称】:核气体处理规范
【标准号】:ANSI/ASMEAG-1b-2007
【标准状态】:作废
【国别】:美国
【发布日期】:2007
【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】:空调;空气净化;空气处理装置;压缩气体;定义;气体净化;气体处理;核能;核安全;核技术;核电站;电站工程;规范(验收);测试;通风设备
【英文主题词】:Airconditioning;Airpurification;Airtreatmentdevices;Compressedgases;Definitions;Gascleaning;Gasprocessing;Nuclearenergy;Nuclearsafety;Nucleartechnology;Nuclear-electricpowerstations;Powerstationengineering;Specification(approval);Testing;Ventilatingequipment
【摘要】:ThisCodeprovidesrequirementsfortheperformance,design,construction,acceptancetesting,andqualityassuranceofequipmentusedascomponentsinnuclearsafety-relatedairandgastreatmentsystemsinnuclearfacilities.
【中国标准分类号】:F09
【国际标准分类号】:27_120_20
【页数】:
【正文语种】:英语


【英文标准名称】:StandardPracticeforCalculationofColorTolerancesandColorDifferencesfromInstrumentallyMeasuredColorCoordinates
【原文标准名称】:仪器测量颜色坐标中允许色差和色差的计算用标准实施规程
【标准号】:ASTMD2244-2009b
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:E12.04
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:color;colordifference;colormetrics;colorspaces;colortolerances;Latexpaints;Lighttransmissionandreflection;Reflectanceandreflectivity--paints/relatedcoatings/materials;Tristimulusvalue;Color--paints/relatedcoatings/materials;Instrum
【摘要】:TheoriginalCIEcolorscalesbasedontristimulusvaluesX,Y,Zandchromaticitycoordinatesx,yarenotuniformvisually.EachsubsequentcolorscalebasedonCIEvalueshashadweightingfactorsappliedtoprovidesomedegreeofuniformitysothatcolordifferencesinvariousregionsofcolorspacewillbemorenearlycomparable.Ontheotherhand,colordifferencesobtainedforthesamespecimensevaluatedindifferentcolor-scalesystemsarenotlikelytobeidentical.Toavoidconfusion,colordifferencesamongspecimensortheassociatedtolerancesshouldbecomparedonlywhentheyareobtainedforthesamecolor-scalesystem.Thereisnosimplefactorthatcanbeusedtoconvertaccuratelycolordifferencesorcolortolerancesinonesystemtodifferenceortoleranceunitsinanothersystemforallcolorsofspecimens.Foruniformityofpractice,theCIErecommendedin1976theuseoftwocolormetrics.TheCIELABmetric,withitsassociatedcolor-differenceequation,hasfoundwideacceptanceinthecoatings,plastics,textilesandrelatedindustries.WhiletheCIELABequationhasnotcompletelyreplacedtheuseofHunterLH,aH,bH,thisolderscaleisnolongerrecommendedforotherthanlegacyusers,andisthereforeincludedinanAppendixforhistoricalpurposes.TheCIELABcolor-differenceequationisalsonotrecommendedinthispracticeforuseindescribingsmallandmoderatecolordifferences(differenceswithmagnitudelessthan5.0x0394;E*abunits).Thefourmorerecentlydefinedequations,documentedhere,arehighlyrecommendedforusewithcolor-differencesintherangeof0.0to5.0x0394;E*abunits.Usersofcolortoleranceequationshavefoundthat,ineachsystem,summationofthree,vectorcolor-differencecomponentsintoasinglescalarvalueisveryusefulfordeterminingwhetheraspecimencoloriswithinaspecifiedtolerancefromastandard.However,forcontrolofcolorinproduction,itmaybenecessarytoknownotonlythemagnitudeofthedeparturefromstandardbutalsothedirectionofthisdeparture.Itispossibletoincludeinformationonthedirectionofasmallcolordifferencebylistingthethreeinstrumentallydeterminedcomponentsofthecolordifference.Selectionofcolortolerancesbasedoninstrumentalvaluesshouldbecarefullycorrelatedwithavisualappraisaloftheacceptabilityofdifferencesinhue,lightness,andsaturationobtainedbyusingPracticeD1729.Thethreetoleranceequationsgivenherehavebeentestedextensivelyagainstsuchdatafortextilesandplasticsandhavebeenshowntoagreewiththevisualevaluationstowithintheexperimentaluncertaintyofthevisualjudgments.Thatimpliesthattheequationsthemselvesmisclassifyacolordifferencewithafrequencynogreaterthanthatofthemostexperiencedvisualcolormatcher.Whilecolordifferenceequationsandcolortoleranceequationsareroutinelyappliedtoawiderangeofilluminants,theyhavebeenderivedoroptimized,orboth,foruseunderdaylightillumination.Goodcorrelationwiththevisualjudgmentsmaynotbeobtainedwhenthecalculationsaremadewithotherilluminants.Useofatoleranceequationforotherthandaylightconditionswillrequirevisualconfirmationofthelevelofmetamerisminaccordancewith........
【中国标准分类号】:A26
【国际标准分类号】:17_180_20
【页数】:11P.;A4
【正文语种】:英语