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【英文标准名称】:Methodsoftestingplastics-Mechanicalproperties-Tensilevibration-Sonic-pulsepropagationmethod
【原文标准名称】:塑料试验方法.第3部分:机械性能.拉伸震动.试验方法323F:声脉冲传播法
【标准号】:BS2782-3Method323F-1997
【标准状态】:作废
【国别】:英国
【发布日期】:1997-08-15
【实施或试行日期】:1997-08-15
【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】:尺寸;频率;材料的机械性能;剪应力;试样;横波;试验设备;纵波;超声检验;塑料;抗拉试验;塑料和橡胶技术
【英文主题词】:Definition;Definitions;Determination;Dynamictesting;Mechanicalproperties;Plastics;Polymers;Sonictesting;Soundpropagation;Testing;Vibration
【摘要】:ThispartofISO6721describesapulsepropagationmethodfordetermin-ingthestoragecomponentofthecomplextensilemodulusEofpolymersatdiscretefrequenciestypicallyintherange3kHzto10kHz.Themethodissuitableformeasuringmaterialswithstoragemoduliintherange0,01GPato200GPaandwithlossfactorsbelow0,1ataround10kHz.Withmaterialshavingahigherloss,significanterrorsinvelocitymeasurementareintroducedthroughdecayofamplitude.Themethodallowsmeasurementstobemadeonthinfilmsorfinefibresandlongspecimens,typicallytapesof300mm×5mm×0,1mmorfibresof300mm×0,1mm(diameter).Thismethodmaynotbesuitableforcellularplastics,compositeplasticsandmultilayerproducts.
【中国标准分类号】:G31
【国际标准分类号】:83_080_01
【页数】:14P.;A4
【正文语种】:英语


【英文标准名称】:Methodsofmeasurementonradioreceiversforvariousclassesofemission;part1:generalconsiderationsandmethodsofmeasurement,includingaudio-frequencymeasurements
【原文标准名称】:各种发射类别的无线电接收机的测量方法第1部分:一般考虑和测量(包括音频测量)方法
【标准号】:IEC60315-1-1988
【标准状态】:现行
【国别】:国际
【发布日期】:1988
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/TC100
【标准类型】:()
【标准水平】:()
【中文主题词】:安全工程;电路网络;安全;计量学;试验;稳定性;仪器;射频;测量技术;高频工程;过电压;电力系统;电子工程;接收机;性能;电信;频率测量;电气工程;低电压;作标记;测量条件;频率;低频;音频信号;天线;音频;乱真信号;原电池;无线电接收机;测量;测量频率
【英文主题词】:Antennas;Audiosignals;Audiofrequencies;Circuitnetworks;Conditions;Electricpowersystems;Electricalengineering;Electricalpropertiesandphenomena;Electronicengineering;Frequencies;Frequencymeasurement;High-frequencyengineering;Inputsignals;Instruments;Lowfrequencies;Lowvoltage;Marking;Measurement;Measurementconditions;Measuringfrequencies;Measuringtechniques;Metrology;Noise(spurioussignals);Overvoltage;Performance;Primarybatteries;Pushbuttons;Radioreceivers;Radiofrequencies;Receivers;Recording;Safety;Safetyengineering;Stability;Telecommunication;Testing
【摘要】:Coversradioreceiversofanykind,excludingtelevisionreceivers,andpartswhichtheyarecomposedoforwhichareusedasauxiliariestosuchreceivers,dealingwiththedeterminationofperformance,thecomparisonofequipmentandthedeterminations
【中国标准分类号】:M70;M74
【国际标准分类号】:33_060_20;33_160_20
【页数】:86P.;A4
【正文语种】:英语