ANSI/IEEE 269-2002 模拟和数字电话机传输性能测试方法

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【英文标准名称】:MethodsforMeasuringTransmissionPerformanceofAnalogandDigitalTelephoneSets
【原文标准名称】:模拟和数字电话机传输性能测试方法
【标准号】:ANSI/IEEE269-2002
【标准状态】:作废
【国别】:美国
【发布日期】:2003-02-05
【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】:IEEE
【标准类型】:()
【标准水平】:()
【中文主题词】:电话设备;传输特性
【英文主题词】:Analoguesignals;Datatransfer;Digitaldata;Speechtransmission;Telecommunications;Telephoneequipment;Telephonesets;Telephonetechnics;Telephones;Transmission;Transmissionperformances
【摘要】:Providesthetechniquesforobjectivemeasurementofelectroacousticcharacteristicsofanaloganddigitaltelephones,handsets,andheadsets.
【中国标准分类号】:M40
【国际标准分类号】:33_050_10
【页数】:
【正文语种】:英语


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【英文标准名称】:StandardTestMethodforResearchOctaneNumberofSpark-IgnitionEngineFuel
【原文标准名称】:研究火花点火发动机燃料的辛烷值的标准试验方法
【标准号】:ASTMD2699-2011
【标准状态】:现行
【国别】:
【发布日期】:2011
【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】:D02.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:导板台;甲烷标准化燃料;抗震性;发动机辛烷值(MON);研究法辛烷值
【英文主题词】:guidetable;toluenestandardizationfuel;Knockcharacteristics;Motoroctanenumber(MON);Researchoctanenumber
【摘要】:ResearchO.N.correlateswithcommercialautomotivespark-ignitionengineantiknockperformanceundermildconditionsofoperation.ResearchO.N.isusedbyenginemanufacturers,petroleumrefinersandmarketers,andincommerceasaprimaryspecificationmeasurementrelatedtothematchingoffuelsandengines.Empiricalcorrelationsthatpermitcalculationofautomotiveantiknockperformancearebasedonthegeneralequation:Valuesofk1,k2,andk3varywithvehiclesandvehiclepopulationsandarebasedonroad-O.N.determinations.ResearchO.N.,inconjunctionwithMotorO.N.,definestheantiknockindexofautomotivespark-ignitionenginefuels,inaccordancewithSpecificationD4814.TheantiknockindexofafuelapproximatestheRoadoctaneratingsformanyvehicles,ispostedonretaildispensingpumpsintheU.S.,andisreferredtoinvehiclemanuals.1.1Thislaboratorytestmethodcoversthequantitativedeterminationoftheknockratingofliquidspark-ignitionenginefuelintermsofResearchO.N.,exceptthatthistestmethodmaynotbeapplicabletofuelandfuelcomponentsthatareprimarilyoxygenates.Thesamplefuelistestedusingastandardizedsinglecylinder,four-strokecycle,variablecompressionratio,carbureted,CFRengineruninaccordancewithadefinedsetofoperatingconditions.TheO.N.scaleisdefinedbythevolumetriccompositionofPRFblends.ThesamplefuelknockintensityiscomparedtothatofoneormorePRFblends.TheO.N.ofthePRFblendthatmatchestheK.I.ofthesamplefuelestablishestheResearchO.N.1.2TheO.N.scalecoverstherangefrom0to120octanenumberbutthistestmethodhasaworkingrangefrom40to120ResearchO.N.Typicalcommercialfuelsproducedforspark-ignitionenginesrateinthe88to101ResearchO.N.range.TestingofgasolineblendstocksorotherprocessstreammaterialscanproduceratingsatvariouslevelsthroughouttheResearchO.N.range.1.3ThevaluesofoperatingconditionsarestatedinSIunitsandareconsideredstandard.Thevaluesinparenthesesarethehistoricalinch-poundunits.ThestandardizedCFRenginemeasurementscontinuetobeininch-poundunitsonlybecauseoftheextensiveandexpensivetoolingthathasbeencreatedforthisequipment.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecifichazardstatements,seeSection8,13.4.1,14.5.1,15.6.1,AnnexA1,A2.2.3.1,A2.2.3.3(6)and(9),A2.3.5,X3.3.7,X4.2.3.1,X4.3.4.1,X4.3.9.3,X4.3.11.4,andX4.5.1.8.
【中国标准分类号】:
【国际标准分类号】:75_160_20
【页数】:45P.;A4
【正文语种】:


【英文标准名称】:Textiles-DeterminationoftheabrasionresistanceoffabricsbytheMartindalemethod-Determinationofmassloss
【原文标准名称】:纺织品.用马丁代尔法(Martindale)对织物抗磨损性的测定.质量损失的测定
【标准号】:BSENISO12947-3-1999
【标准状态】:现行
【国别】:英国
【发布日期】:1999-04-15
【实施或试行日期】:1999-04-15
【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】:抗磨性;耐磨试验仪;磨蚀试验;布;测定;擦伤试验;马丁代尔;质量损失;材料测试;测量试样;耐力;耐磨损性;抽样方法;表面型式;试验设备;试样;试验;纺织试验;纺织材料;磨损试验;重量损失;重量测量
【英文主题词】:Abrasionresistance;Abrasiontesters;Abrasiontests;Cloth;Determination;Frayingtests;Martindale;Masslosses;Materialstesting;Measuringsamples;Resistance;Resistanceagainstabrasion;Samplingmethods;Surfacepatterns;Testequipment;Testspecimens;Testing;Textiletesting;Textiles;Weartests;Weightlosses;Weightmeasurement
【摘要】:ThispartofISO12947isapplicabletothedeterminationofthemasslossofspecimenscoveringalltextilefabricsincludingnonwovensapartfromfabricswherethespecifierindicatestheendperformanceashavingalowabrasionwearlife.NOTEFurtherintroductorycommentsaregiveninISO12947-1.
【中国标准分类号】:W55
【国际标准分类号】:59_080_30
【页数】:16P.;A4
【正文语种】:英语