IEC 60107-3-1988 电视广播传输接收机的推荐测量方法第3部分:用副载系统多声道电视接收机的电气测量
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【英文标准名称】:Recommendedmethodsofmeasurementonreceiversfortelevisionbroadcasttransmissions;part3:electricalmeasurementsonmultichannelsoundtelevisionreceiversusingsubcarriersystems
【原文标准名称】:电视广播传输接收机的推荐测量方法第3部分:用副载系统多声道电视接收机的电气测量
【标准号】:IEC60107-3-1988
【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】:测量;电视;测量技术;电气工程;定义;电视广播;无线电接收机;电性质和电现象;试验;电学测量;多路声音;接收机;电视接收机
【英文主题词】:Definitions;Electricalengineering;Electricalmeasurement;Electricalpropertiesandphenomena;Measurement;Measuringtechniques;Multichannelsound;Radioreceivers;Receivers;Television;Televisionbroadcasting;Televisionreceivers;Testing
【摘要】:Coversmeasurementsoffrequencyresponse,audio-frequencynon-linearitydistortion,audiochannelseparation(crosstalkandstereophonicseparation),internallygeneratedinterference(noisefloor,signal-to-buzzratioetc.)andsensitivity(signal-to-n
【中国标准分类号】:M74
【国际标准分类号】:33_160_25
【页数】:51P.;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodforApparentBendingModulusofPlasticsbyMeansofaCantileverBeam
【原文标准名称】:用悬臂梁法对塑料表观弯曲系数的标准试验方法
【标准号】:ASTMD747-2002
【标准状态】:现行
【国别】:
【发布日期】:2002
【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】:D20.10
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:试验;塑料
【英文主题词】:apparentbendingmodulus;bendingmovement;cantileverbeam;stiffness;
【摘要】:Thistestmethodprovidesameansofderivingtheapparentbendingmodulusofamaterialbymeasuringforceandangleofbendofacantileverbeam.Themathematicalderivationassumessmalldeflectionsandpurelyelasticbehavior.Underactualtestconditions,thedeformationhasbothelasticandplasticcomponents.Thistestmethoddoesnotdistinguishorseparatethese,andhenceatrueelasticmodulusisnotcalculable.Instead,anapparentvalueisobtainedandisdefinedastheapparentbendingmodulusofthematerial.ThetangentmodulusobtainedbyTestMethodsD790ispreferred,whenthematerialcanbetestedbytheTestMethodsD790testprocedure.Becauseofdeviationsfrompurelyelasticbehavior,changesinspanlength,width,anddepthofthespecimenwillaffectthevalueoftheapparentbendingmodulusobtained;therefore,valuesobtainedfromspecimensofdifferentdimensionsmaynotnecessarilybecomparable.Rateofloadingiscontrolledonlytotheextentthattherateofangularchangeoftherotatingjawisfixedat58to66x00B0;/min.Actualrateofstressingwillbeaffectedbyspanlength,width,depthofthespecimen,andweightofthependulum.Formanymaterials,theremaybeaspecificationthatrequirestheuseofthistestmethod,butwithsomeproceduralmodificationsthattakeprecedencewhenadheringtothespecification.Therefore,itisadvisabletorefertothatmaterialspecificationbeforeusingthistestmethod.Table1ofClassificationSystemD4000liststheASTMmaterialsstandardsthatcurrentlyexist.Note28212;Adiscussionofthetheoryofobtainingapurelyelasticbendingmodulus,usingacantileverbeamtestingapparatus,canbefoundinAppendixX1.Theresultsobtainedunderactualtestconditionswillbetheapparentbendingmodulus.1.1Thistestmethodcoversthedeterminationoftheapparentbendingmodulusofplasticsbymeansofacantileverbeam.Itiswellsuitedfordeterminingrelativeflexibilityofmaterialsoverawiderange.ItisparticularlyusefulformaterialstooflexibletobetestedbyTestMethodsD790.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note18212;ThereisnoknownISOequivalentforthisstandard.
【中国标准分类号】:G31
【国际标准分类号】:83_080_01
【页数】:5P.;A4
【正文语种】:
【英文标准名称】:Bondedabrasiveproducts-Dimensions-Part15:grindingwheelsforcutting-offonstationaryormobilecutting-offmachines.
【原文标准名称】:粘合磨料产品.尺寸.第15部分:固定或移动磨料切削机上的切削砂轮
【标准号】:NFE75-202-15-1999
【标准状态】:现行
【国别】:法国
【发布日期】:1999-12-01
【实施或试行日期】:1999-12-20
【发布单位】:法国标准化协会(FR-AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:摆式研磨机;尺寸;磨料;规范(验收);名称与符号;工具;粘合;磨料制品;夹具;砂轮;试验;切割砂轮;磨料切削机
【英文主题词】:Abrasivecutting-offmachines;Abrasiveproducts;Abrasives;Bound;Cutting-offwheels;Designations;Dimensions;Fixtures;Grindingwheels;Pendulumgrindingmachine;Specification(approval);Testing;Tools
【摘要】:
【中国标准分类号】:J43
【国际标准分类号】:25_100_70
【页数】:10P.;A4
【正文语种】:其他
