您的位置: 标准下载 » 协会标准 » ASTM 美国材料与试验协会 »
热门标准
下载排行

ASTM E1682-2005 直观显示装置比色特性模拟的标准指南

作者:标准资料网 时间:2024-05-16 10:12:32  浏览:8941   来源:标准资料网
下载地址: 点击此处下载
【英文标准名称】:StandardGuideforModelingtheColorimetricPropertiesofaVisualDisplayUnit
【原文标准名称】:直观显示装置比色特性模拟的标准指南
【标准号】:ASTME1682-2005
【标准状态】:现行
【国别】:
【发布日期】:2005
【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】:E12.06
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:直观显示装置;颜色;光学;数学模型;比色法;导向装置
【英文主题词】:cathoderaytubes(CRTs);colorimetry;computergraphics;displays;videomonitors;visualdisplayunits
【摘要】:ThecolordisplayedonaVDUisanimportantaspectofthereproductionofcoloredimages.TheVDUisoftenusedasthedesign,edit,andapprovalmedium.Imagesareplacedintothecomputerbysomesortofcapturedevice,suchasacameraorscanner,modifiedbythecomputeroperator,andsentontoaprinterorcolorseparationgenerator,oreventoapaintdispenserortextiledyer.Thecolorofthefinalproductistohavesomewell-definedrelationshiptotheoriginal.Themostcommonmediumforestablishingtherelationshipbetweeninput,edit,andoutputcolor(device-independentcolorspace)istheCIEtristimulusspace.ThisguideidentifiestheproceduresforderivingamodelthatrelatesthedigitalcomputersettingsofaVDUtotheCIEtristimulusvaluesofthecoloredlightemittedbytheprimaries.1.1Thisguideisintendedforuseinestablishingtheoperatingcharacteristicsofavisualdisplayunit(VDU),suchasacathoderaytube(CRT).Thosecharacteristicsdefinetherelationshipbetweenthedigitalinformationsuppliedbyacomputer,whichdefinesanimage,andtheresultingspectralradiantexitanceandCIEtristimulusvalues.Themathematicaldescriptionofthisrelationshipcanbeusedtoprovideanearbydevice-independentmodelfortheaccuratedisplayofcolorandcoloredimagesontheVDU.TheCIEtristimulusvaluesreferredtoherearethosecalculatedfromtheCIE19312176standardcolorimetric(photopic)observer.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:N53
【国际标准分类号】:17_180_20;35_180
【页数】:6P.;A4
【正文语种】:


下载地址: 点击此处下载
返回跳至顶部
【英文标准名称】:Wateranalysis-Guidelinesforthedeterminationoftotalorganiccarbon(TOC)anddissolvedorganiccarbon(DOC)
【原文标准名称】:水分析.有机碳(TOC)和溶解的有机碳(DOC)总含量的测定导则
【标准号】:BSEN1484-1997
【标准状态】:现行
【国别】:英国
【发布日期】:1997-10-15
【实施或试行日期】:1997-10-15
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:控制样品;污水;再现性;试样制备;水质试验;定量分析;碳素物质测定;地表水;有机物质测定;悬浮液;化学分析和试验;氧化法;碳;地下水;校正;试剂溶液;含量测定;饮用水;浓度(化学);化学试剂;海水;质量;水;试样
【英文主题词】:Analysis;Carbon;Carboncontent;Chemicalanalysisandtesting;Chemicalreactions;Chemicals;Concentration;Definition;Definitions;Determination;Determinationofcontent;Dilution;Groundwater;Guidelines;Inorganiccompounds;Inspection;Massconcentration;Methods;Organiccompounds;Organicmatters;Potablewater;Quality;Reducingagents;Reduction;Samplingmethods;Seawater;Sewage;Solutes;Surfacewater;Testing;Water;Wateranalysis;Waterpractice;Waterquality;Watersamples;Watertesting;Waters
【摘要】:ThisEuropeanStandardgivesguidanceforthedeterminationoforganiccarbonindrinkingwater,groundwater,surfacewater,seawaterandwastewater.Itdealswithdefinitions,interferences,reagents,andthesamplepretreatmentofwatersampleswithacontentoforganiccarbonrangingfrom0,3mg/1to1000mg/lwhilethelowervalueisonlyapplicableinspecialcases,forexampledrinkingwater,measuredwithinstrumentscapableofmeasuringtheselowlevels.Higherconcentrationsmaybedeterminedafterappropriatedilution.ThisEuropeanStandarddoesnotdealwiththeinstrument-dependentaspects.Inadditiontoorganiccarbon,thewatersamplemaycontaincarbondioxideorionsofcarbonicacid.PriortotheTOCdetermination,itisessentialthatthisinorganiccarbonisremovedbypurgingtheacidifiedsamplewithagaswhichisfreefromCO2andorganiccompounds.Alternatively,bothtotalcarbon(TC)andtotalinorganiccarbon(TIC)maybedeterminedandtheorganiccarboncontent(TOC)maybecalculatedbysubtractingthetotalinorganiccarbonfromtheTC.ThismethodisparticularlysuitableforsamplesinwhichthetotalinorganiccarbonislessthantheTOC.Purgeableorganicsubstances,suchasbenzene,toluene,cyclohexane,andchloroformmaypartlyescapeuponstripping.Inthepresenceofthesesubstances,theTOCconcentrationisdeterminedseparately,orthedifferentialmethod(TC-TIC=TOC)maybeapplied.Byusingthedifferentialmethod,thevalueoftheTOCshouldbehigherthantheTIC,oratleastofsimilarsize.Cyanide,cyanate,andparticlesofelementalcarbon(soot)whenpresentinthesample,willbedeterminedtogetherwiththeorganiccarbon.NOTE.Inthepresenceofhumicmaterial,lowvaluesmayoccurwhenUVradiationisused.
【中国标准分类号】:Z16
【国际标准分类号】:13_060_50
【页数】:14P.;A4
【正文语种】:英语


【英文标准名称】:StandardTestMethodforBindingSitesPerUnitLengthorWidthofPileYarnFloorCoverings
【原文标准名称】:绒头纱线地板覆盖物每单位长度或宽度结接点的标准试验方法
【标准号】:ASTMD5793-2005
【标准状态】:现行
【国别】:
【发布日期】:2005
【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】:D13.21
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:试验;建筑;纺织材料;地毯;测试方法;铺地织物
【英文主题词】:bindingsites;carpet;construction;floorcovering;pileyarn
【摘要】:Thistestmethodisusefulinqualityandcostcontrolduringmanufacture.Bothappearanceandperformanceofpileyarnfloorcoveringscanbeaffectedbythenumberofbindingsitesperlengthandwidth.Thistestmethodisconsideredsatisfactoryforacceptancetestingofcommercialshipmentsbecausecurrentestimatesofbetween-laboratoryprecisionareacceptableandthemethodisusedextensivelyinthetradeforacceptancetesting.5.2.1Iftherearedifferencesofpracticalsignificancebetweenreportedtestresultsfortwolaboratories(ormore),comparativetestsshouldbeperformedtodetermineifthereisstatisticalbiasbetweenthemusingcompetentstatisticalassistance.Asaminimum,usetestsamplesforsuchcomparativeteststhatareashomogeneousaspossible,drawnformthesamelotofmaterialasthesamplesthatresultedinthedisparateresultsduringinitialtesting,andthatarerandomlyassignedinequalnumberstoeachlaboratoryfortesting.Thetestresultsfromthelaboratoriesshouldbecomparedusingastatisticaltestforunpaireddataataprobabilitylevelchosenpriortothetestingseries.Ifabiasisfoundeitheritscausemustbefoundandcorrected,orfuturetestresultsforthatmaterialmustbeadjustedinconsiderationoftheknowbias.1.1Thistestmethoddescribesthemeasurementofthenumberofbindingsitesperunitlengthorwidthofmachine-made,woven,knitted,andtuftedpileyarnfloorcoveringbothbeforeandafteradhesivebackingapplication.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandardforallmeasurements.Theinch-poundvaluesprovidedareforinformationpurposesonly.1.3DeterminationofthenumberofbindingsitesperunitlengthorwidthofpilefloorcoveringpreviouslywascontainedwithinTestMethodsD418.Note1Foruserconvenience,SubcommitteeD13.21hassubdividedTestMethodD418intoseparatestandards,ofwhichthistestmethodisone.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:W56
【国际标准分类号】:59_080_60
【页数】:4P.;A4
【正文语种】: