【英文标准名称】:TestMethodforDeterminingtheChemicalResistanceofFiberglass-ReinforcedThermosettingResinsbyOne-SidePanelExposure
【原文标准名称】:板单面曝光法测定玻璃纤维增强热固树脂的耐化学性的试验方法
【标准号】:ASTMD4398-1989
【标准状态】:作废
【国别】:美国
【发布日期】:1989
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:塑料;玻璃纤维增强塑料;热固性聚合物;耐化学性;树脂;试验;测定
【英文主题词】:thermosettingpolymers;plastics;chemicalresistance;glass-fibrereinforcedplastics;resins;determination;testing
【摘要】:
【中国标准分类号】:G32
【国际标准分类号】:83_120
【页数】:5P;A4
【正文语种】:英语


【英文标准名称】:Soundsystemequipment.Electroacoustictransducers.Measurementoflargesignalparameters
【原文标准名称】:音响系统设备.声电变换器.大信号参数的测定
【标准号】:BSEN62458-2011
【标准状态】:现行
【国别】:英国
【发布日期】:2011-06-30
【实施或试行日期】:2011-06-30
【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】:
【英文主题词】:Acoustics;Acoustoelectricdevices;Amplifiers;Audioamplifiers;Definitions;Distortionfactors;Electricpower(wattage);Electricalengineering;Electricalmeasurement;Electroacoustics;Electronicinstruments;Entertainmentelectronics;Headphones;Inputpower;Inputvoltage;Interferingnoise;Loudspeakers;Measurement;Measuringaccuracy;Measuringinstruments;Measuringtechniques;Non-linearity;Performance;Physicalproperties;Poweroutput;Properties;Qualityassurance;Ratings;Signalconverters;Signaldistortion;Signals;Soundtransducer;Specification(approval);Testsignals;Testing;Transformers;Voltage
【摘要】:ThisInternationalStandardappliestotransducerssuchasloudspeakerdriveunits,loudspeakersystems,headphones,micro-speakers,shakersandotheractuatorsusingeitheranelectro-dynamicalorelectro-magneticmotorcoupledwithamechanicalsuspension.Thelargesignalbehaviourofthetransducerismodelledbyalumpedparametermodelconsideringdominantnonlinearitiessuchasforcefactor,stiffnessandinductanceasshowninFigure1.Thestandarddefinesthebasictermsandparametersofthemodel,themethodsofmeasurementsandthewaytheresultsshouldbereported.
【中国标准分类号】:M72
【国际标准分类号】:33_160_50
【页数】:28P.;A4
【正文语种】:英语