【英文标准名称】:Methodsoftestforpetroleumanditsproducts-BS2000-69:Petroleumproducts-Determinationofvapourpressure-Reidmethod
【原文标准名称】:石油及其产品试验方法.BS2000-69:石油产品.蒸汽压力的测定.雷德法
【标准号】:BSISO3007-2002
【标准状态】:现行
【国别】:英国
【发布日期】:2002-06-12
【实施或试行日期】:2002-06-12
【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】:定义;定义(术语);测定;石油产品;物理试验;雷德;测试;试验;蒸气压力
【英文主题词】:Definition;Definitions;Determination;Petroleumproducts;Physicaltesting;Reid;Testing;Tests;Vapourpressure
【摘要】:ThisInternationalStandardspecifiesamethodforthedeterminationofthevapourpressureofliquidpetroleumproductsconsistingofessentiallyorwhollyofhydrocarboncomponents,orcontainingoxygenatedhydrocarbonsofspecifictypesandatspecifiedmaximumconcentrations.Themethoddoesnotapplyoutsidetheseconcentrationlevels,nortoanyblendscontainingmethanolorotheroxygenatedhydrocarbonsnotcoveredinnote1.NOTE1Themaximumconcentrationofetherscontaining5ormorecarbonatomsis15%(V/V),andforethanolis10%(V/V).Forhigheralcohols,themaximumconcentrationis7%(V/V).NOTE2ForthepurposesofthisInternationalStandard,theterm"%(V/V)"isusedtorepresentthevolumefractionofamaterial.Forpetroleumproductscontainingmethanol,orotheroxygenatedhydrocarbonsoutsidethescopeofnote1,adryvapour-pressuretestmethodshouldbeused.Forliquefiedpetroleumgases,ISO4256shouldbeused.Thetestmethodmaybeappliedtovolatilecrudepetroleumwithavapourpressureexceeding10kPa,althoughtheprecisionhasnotbeenevaluated.FourproceduresaredescribedinthisInternationalStandard.ProceduresAandBarealternativeapparatusconfigurationsforproductswithaReidvapourpressureupto180kPa,ProcedureCisappliedtoliquidproductswithaReidvapourpressureabove180kPa,andProcedureDappliestoaviationgasolineswithaReidvapourpressureofapproximately50kPa.Vapourpressureisanimportantphysicalpropertyofvolatileliquids,andhascriticalperformanceimplicationsforautomotiveandaviationgasolines.Vapourpressureisalsooneofthepropertiesaffectingatmosphericevaporation,andisthereforeincreasinglyusedinregulationsrelatingtoemissionsandairqualitycontrol.Vapourpressureisalsoacriticalpropertylimitingtheperformanceandsafetyofoperationofequipmentduringtransferoperations.NOTEBecausetheexternalatmosphericpressureiscounteractedbytheatmosphericpressureinitiallyinthevapourchamber,theReidvapourpressureisapproximatelythe"absolute"vapourpressureat37,8℃.TheReidvapourpressurediffersfromthetruevapourpressureofthesampleowingtoslightvaporizationofthesampleandthepressureofwatervapourandairintheconfinedspace.
【中国标准分类号】:E30
【国际标准分类号】:75_040;75_080
【页数】:18P.;A4
【正文语种】:英语


【英文标准名称】:Informationtechnology-JPEG2000imagecodingsystem-Part12:ISObasemediafileformat
【原文标准名称】:信息技术.JPEG2000图像编码系统.第12部分:ISO基介质文档格式
【标准号】:ISO/IEC15444-12-2005
【标准状态】:作废
【国别】:国际
【发布日期】:2005-04
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/IECJTC1/SC29
【标准类型】:()
【标准水平】:()
【中文主题词】:JPEG;数据压缩;编码(数据转换);数据格式;图形数据处理;定义;图象处理;介质;数字数据;数据处理;信息技术
【英文主题词】:Coding(dataconversion);Datacompression;Dataformats;Dataprocessing;Definition;Definitions;Digitaldata;Graphicdataprocessing;Imageprocessing;Informationtechnology;JPEG;Media
【摘要】:ThisInternationalStandardspecifiestheISObasemediafileformat,whichisageneralformatformingthebasisforanumberofothermorespecificfileformats.Thisformatcontainsthetiming,structure,andmediainformationfortimedsequencesofmediadata,suchasaudio/visualpresentations.ThispartofISO/IEC14496isapplicabletoMPEG-4,butitstechnicalcontentisidenticaltothatofISO/IEC15444-12,whichisapplicabletoJPEG2000.
【中国标准分类号】:L81
【国际标准分类号】:35_040
【页数】:84P;A4
【正文语种】:英语