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【英文标准名称】:StandardTestMethodforAnalysisofTitaniumandTitaniumAlloysbyAtomicEmissionPlasmaSpectrometry
【原文标准名称】:用原子辐射等离子体光谱测定法分析钛和钛合金的标准试验方法
【标准号】:ASTME2371-2004
【标准状态】:现行
【国别】:
【发布日期】:2004
【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】:E01.06
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:atomicemissionspectrometry;DCP;directcurrentplasma;ICP;inductivelycoupledplasma;titanium;titaniumalloys
【摘要】:Thismethodforthechemicalanalysisoftitaniumandtitaniumalloysisprimarilyintendedtotestmaterialforcompliancewithspecificationsofchemicalcomposition.Itisassumedthatallwhousethismethodwillbetrainedanalystscapableofperformingcommonlaboratoryproceduresskillfullyandsafely,andthattheworkwillbeperformedinaproperlyequippedlaboratory.Themethodisdesignedtogivethemaximumflexibilityanalyzingelementsinthetitaniummatrix.ThusoptionsaregivenincalibrationandanalysistoaccommodatethevarietyofICPandDCPspectrometersandtheirauxiliarysystems.1.1ThismethoddescribestheanalysisoftitaniumandtitaniumalloysbyICP-AES(InductivelyCoupledPlasma)andDCP-AES(DirectCurrentPlasma)forthefollowingelements:ElementApplicationRange(wt.%)QuantitativeRange(wt.%)Aluminum0-80.001to8.0Boron0-0.040.0008to0.01Chromium0-50.005to4.0Copper0-0.60.002to0.5Iron0-30.004to3.0Manganese0-0.040.001to0.01Molybdenum0-80.004to6.0Nickel0-10.001to1.0Silicon0-0.50.02to0.4Tin0-40.02to3.0Vanadium0-150.01to15.0Yttrium0-0.040.001to0.004Zirconium0-50.003to4.0【英文标准名称】:Methodsofmeasurementforradiotransmitters.Performancecharacteristicsofterrestrialdigitaltelevisiontransmitters
【原文标准名称】:无线电广播发射机测量方法.地面数字电视发射机的工作特性
【标准号】:BSEN62273-1-2007
【标准状态】:现行
【国别】:英国
【发布日期】:2007-05-31
【实施或试行日期】:2007-05-31
【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】:广播工程;广播;特征;通信;传播技术;条件;定义(术语);数字的;数字广播;数字连接;数字数据;数字工程;数字无线电线路;数字电视;电气工程;电学测量;频率;频率范围;互相调制;测量;测量技术;测量方法;调制;性能;功率输出;无线电电路;无线电工程;无线电装置;无线电发射机;无线电通信;额定输出功率;声音广播发射;规范(验收);电讯;电信传输法;电信;电视发射机;陆地的;测试信号;测试;传输特征;传输性能;传输特性;发射机;发射功率;
【英文主题词】:Broadcastengineeering;Broadcasting;Characteristics;Communication;Communicationtechnology;Conditions;Definitions;Digital;Digitalbroadcasting;Digitalconnections;Digitaldata;Digitalengineering;Digitalradiolinks;Digitaltelevision;Electricalengineering;Electricalmeasurement;Frequencies;Frequencyranges;Intermodulation;Measurement;Measuringtechniques;Methodsformeasuring;Modulation;Performance;Poweroutput;Radiocircuits;Radioengineering;Radiosystems;Radiotransmitters;Radiocommunication;Ratedoutputpower;Sound-broadcastingemissions;Specification(approval);Telecommunication;Telecommunicationtransmissionmethods;Telecommunications;Televisiontransmitters;Terrestrial;Testsignals;Testing;Transmissioncharacteristics;Transmissionperformance;Transmissionperformances;Transmitters;Transmittingpower;
【摘要】:ThispartofIEC62273givestheconditionsformeasuringtheperformanceparametersofterrestrialdigitaltransmittersandforfacilitatingthecomparisonofmeasurementswhicharecarriedoutbydifferentpersonnel.Itcontainsdetailsofspeciallyselectedmethodsfordeterminingthemostimportantperformanceparametersofdigitaltransmitters.Themeasurementmethodsdescribedapplytoalimitednumberofperformanceparameters,i.e.thosewhichcangiverisetoambiguousinterpretationduetotheuseofdifferentmethodsandconditions.Theyareneitherrestrictivenormandatory:measurementscanbechosenforeachparticularcase.Ifnecessary,additionaltestscanbecarriedoutbuttheyshallcomplywiththosestandardswhichhavebeenestablishedbyotherstudygroups,subcommitteesoftheIECorotherinternationalorsuitablyaccreditedorganizations.Nolimitshavebeenassignedtoquantifyacceptablerangesofperformanceparameters.Thesearejudgedtobeproperlyincludedinthetechnicalspecificationsforindividualtransmitters;however,thetermsandthemannerusedtoquantifythemshouldideallybethosedescribedinafutureIECpublication.Themeasurementmethodsdescribedinthisstandardareintendedfortypeapprovaltests.Howevertheycanequallywellapplytoacceptancetestsmeasurementsandqualitycontroltestseitherinfactoriesoronsite.Testsignalsareusedtomeasureperformanceparametersforbothdigitalandanalogueterrestrialtransmitters.Theirelectroniccharacteristicsandtheirassociatedperformanceparametersarewidelyunderstood.Thetestsignalsaremeasuredaftertheyhavegonethroughthetransmitterequipmenttodetermineiftheirdegradationiswithintherequiredqualitycriteria.ThisstandarddoesnotgointoanydetailregardingMPEG2signalsorDVBprocessesnordoesitdealwithdigitalsignalprocessing.
【中国标准分类号】:M74
【国际标准分类号】:33_060_20;33_170
【页数】:42P.;A4
【正文语种】:英语