ANSI T1.102-1993 电信.数字分层.电气接口
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【英文标准名称】:Telecommunications–DigitalHierarchy–ElectricalInterfaces
【原文标准名称】:电信.数字分层.电气接口
【标准号】:ANSIT1.102-1993
【标准状态】:现行
【国别】:美国
【发布日期】:1993-01-01
【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】:ATIS
【标准类型】:()
【标准水平】:()
【中文主题词】:界面;通信网;电信;数据率;接口;位流;数字连接;数字工程;复接;定义;网络互连
【英文主题词】:telecommunications;datarates;interfaces(dataprocessing);communicationnetworks;definitions;bitstreams;multiplexing;digitalconnections;digitalengineering;interfaces;networkinterconnection
【摘要】:TheNorthAmericandigitalnetworkismadeupofsourcesofdigitalsignals,includingchannelbanks,digitalswitches,andmultiplexequipment,interconnectedbytransmissionfacilities.Theseoperateatseveraldifferentbitrates.Atanyonelevelin
【中国标准分类号】:L78
【国际标准分类号】:33_040_40
【页数】:48P.;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodforDeterminationofNon-MethaneOrganicCompounds(NMOC)inAmbientAirUsingCryogenicPreconcentrationandDirectFlameIonizationDetectionMethod(Metric)
【原文标准名称】:用低温预先富集和直接火焰离子检测法测定环境空气中非甲烷有机化合物(NMOC)的标准试验方法(米制单位)
【标准号】:ASTMD5953M-1996(2009)
【标准状态】:现行
【国别】:美国
【发布日期】:1996
【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】:D22.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:ambientatmospheres;analysis;atmospheres;canistersampling;cryogenicsampling;flameionizationdetection;indooratmospheres;non-methanehydrocarbons;sampling;workplaceatmospheres;Ambientair/atmosphericanalysis;Canistersamplingmethod
【摘要】:ManyindustrialprocessesrequiredeterminationofNMOCintheatmosphere.AccuratemeasurementsofambientconcentrationsofNMOCareimportantforthecontrolofphotochemicalsmogbecausetheseorganiccompoundsareprimaryprecursorsofatmosphericozoneandotheroxidants(7,8).TheNMOCconcentrationstypicallyfoundaturbansitesmayrangeupto1to3ppmCorhigher.Inordertodeterminetransportofprecursorsintoanarea,measurementofNMOCupwindoftheareamaybenecessary.RuralNMOCconcentrationsoriginatingfromareasfreefromNMOCsourcesarelikelytobelessthanafewtenthsof1ppmC.Conventionaltestmethodsthatdependongaschromatographyandqualitativeandquantitativespeciesevaluationareexcessivelydifficultandexpensivetooperateandmaintainwhenspeciatedmeasurementsarenotneeded.Thetestmethoddescribedhereinvolvesasimple,cryogenicpreconcentrationprocedurewithsubsequentdirectdetectionwiththeFID.ThetestmethodissensitiveandprovidesaccuratemeasurementsofambienttotalNMOCconcentrationswherespeciateddataarenotrequired.Anapplicationofthetestmethodisthemonitoringofthecleanlinessofcanisters.Anotheruseofthetestmethodisthescreeningofcanistersamplespriortoanalysis.Collectionofambientairsamplesinpressurizedcanistersprovidesthefollowingadvantages:Convenientintegrationofambientsamplesoveraspecifictimeperiod,Capabilityofremotesamplingwithsubsequentcentrallaboratoryanalysis,Abilitytoshipandstoresamples,ifnecessary,Unattendedsamplecollection,Analysisofsamplesfrommultiplesiteswithoneanalyticalsystem,Collectionofreplicatesamplesforassessmentofmeasurementprecision,andSpecifichydrocarbonanalysiscanbeperformedwiththesamesamplesystem.1.1Thistestmethodcoversaprocedureforsamplinganddeterminingconcentrationsofnon-methaneorganiccompounds(NMOC)inambient,indoor,orworkplaceatmospheres.1.2Thetestmethoddescribesthecollectionofcumulativesamplesinpassivatedstainlesssteelcanistersandsubsequentlaboratoryanalysis.1.2.1Thistestmethoddescribesaprocedureforsamplingincanistersatfinalpressuresaboveatmosphericpressure(referredtoaspressurizedsampling).1.3ThistestmethodemploysacryogenictrappingprocedureforconcentrationoftheNMOCpriortoanalysis.1.4ThistestmethoddescribesthedeterminationoftheNMOCbythesimpleflameionizationdetector(FID),withoutthegaschromatographiccolumnsandcomplexproceduresnecessaryforspeciesseparation.1.5Therangeofthistestmethodisfrom20to10000ppbC(1,2).Seeforproceduresforloweringtherange.1.6Thetestmethodmayyieldlessaccurateresultsforsomehalogenatedoroxygenatedhydrocarbonsemittedfromnearbysourcesofindustrialairpollutants.Thisisespeciallytrueiftherearehighconcentrationsofchlorocarbonsorchlorofluorocarbonspresent.1.7ThevaluesstatedinSIunitsareregardedasstandard.1.8Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Z15
【国际标准分类号】:71_040_50
【页数】:13P.;A4
【正文语种】:英语
【英文标准名称】:StandardfortheDesignofHigh-PerformanceGreenBuildingsExceptLow-RiseResidentialBuildings
【原文标准名称】:除低层住宅建筑以外的高性能绿色建筑的设计标准
【标准号】:ANSI/ASHRAE/USGBC/IES189.1w-2011
【标准状态】:作废
【国别】:美国
【发布日期】:2011
【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】:
【英文主题词】:Area;Atmosphere;Basicdomesticfacilities;Boundary;Buildingprotection;Buildings;Electrical;Energyconversion;Environmentalaspects;Green;Highcapacity;Impact;Indoors;Performance;Quality;Renovation;Serviceinstallationsinbuildings;Thermalenvironmentsystems;Thermalinsulation;Waterefficiency
【摘要】:
【中国标准分类号】:
【国际标准分类号】:91_120_10;91_140_01
【页数】:
【正文语种】:英语
