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IEC/TR 62064-1999 射频电缆表面传输阻抗和屏蔽衰减关系(IEC61196-1第14章中推荐极限值的背景文件)

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【英文标准名称】:Radio-frequencycables-Relationshipbetweensurfacetransferimpedanceandscreeningattenuation(AbackgroundtotherecommendedlimitscontainedinIEC61196-1,clause14)
【原文标准名称】:射频电缆表面传输阻抗和屏蔽衰减关系(IEC61196-1第14章中推荐极限值的背景文件)
【标准号】:IEC/TR62064-1999
【标准状态】:作废
【国别】:国际
【发布日期】:1999-07
【实施或试行日期】:
【发布单位】:国际电工委员会(IEC)
【起草单位】:IEC/SC46A
【标准类型】:()
【标准水平】:()
【中文主题词】:电气工程;阻抗;同轴电缆;电缆;滤屏衰减;射频电缆
【英文主题词】:Cables;Coaxialcables;Electricalengineering;Impedance;Radiofrequencycables;Screeningattenuation
【摘要】:ThistechnicalreportdescribesthevaluablebackgroundmaterialusedduringtherevisionofIEC61196-1,clause14,guidanceforsurfacetransferimpedanceandscreeningattenuationlimitsforflexibler.f.cables.Inthisreporttherelationshipbetweensurfacetransferimpedance(ZT)andscreeningattenuation(as)isgiven,alsomeasurementsofZTandasareprovidedtoshowthecorrelationofmeanscanningattenuationbetween200MHzand500MHzandZTatboth30MHzand300MHz.Thesensitivityofasandtherelativevelocitydifferencebetweentheinnerandoutersystemisshown,alsotheneedforthecabledatasheettoshowtheasvaluesinastandardizedform-△v/v=10%andthecharacteristicimpedanceoftheoutersystemis150Ω.Itisalsoshownthatarelativevelocitydifferencechangefrom10%to40%givesanimprovementof12dBinscreeningattenuation.
【中国标准分类号】:K13
【国际标准分类号】:33_120_10
【页数】:14P;A4
【正文语种】:英语


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【英文标准名称】:StandardTestMethodforShort-BeamStrengthofPolymerMatrixCompositeMaterialsandTheirLaminates
【原文标准名称】:用短梁法测定平行纤维组合材料表观层间剪切强度的标准试验方法
【标准号】:ASTMD2344/D2344M-2000(2006)
【标准状态】:现行
【国别】:美国
【发布日期】:2000
【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】:D30.04
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:compositematerials;resinandinterlaminarproperties;short-beamstrength
【摘要】:Inmostcases,becauseofthecomplexityofinternalstressesandthevarietyoffailuremodesthatcanoccurinthisspecimen,itisnotgenerallypossibletorelatetheshort-beamstrengthtoanyonematerialproperty.However,failuresarenormallydominatedbyresinandinterlaminarproperties,andthetestresultshavebeenfoundtoberepeatableforagivenspecimengeometry,materialsystem,andstackingsequence(4).Short-beamstrengthdeterminedbythistestmethodcanbeusedforqualitycontrolandprocessspecificationpurposes.Itcanalsobeusedforcomparativetestingofcompositematerials,providedthatfailuresoccurconsistentlyinthesamemode(5).ThistestmethodisnotlimitedtospecimenswithintherangespecifiedinSection8,butislimitedtotheuseofaloadingspanlength-to-specimenthicknessratioof4.0andaminimumspecimenthicknessof2.0mm[0.08in.].1.1Thistestmethoddeterminestheshort-beamstrengthofhigh-modulusfiber-reinforcedcompositematerials.Thespecimenisashortbeammachinedfromacurvedoraflatlaminateupto6.00mm[0.25in.]thick.Thebeamisloadedinthree-pointbending.1.2Applicationofthistestmethodislimitedtocontinuous-ordiscontinuous-fiber-reinforcedpolymermatrixcomposites,forwhichtheelasticpropertiesarebalancedandsymmetricwithrespecttothelongitudinalaxisofthebeam.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.1.3ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemmustbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewiththestandard.
【中国标准分类号】:G33
【国际标准分类号】:83_140_20
【页数】:8P.;A4
【正文语种】:英语


【英文标准名称】:Photography;electronicflashequipment;determinationoflightoutputandperformance
【原文标准名称】:摄影电子闪光装置光输出和性能的测定
【标准号】:ISO2827-1988
【标准状态】:现行
【国别】:国际
【发布日期】:1988-08
【实施或试行日期】:1988-08-15
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC42
【标准类型】:()
【标准水平】:()
【中文主题词】:摄影设备;测量;发光强度;照度;额定值;闪光指数;光发射;照相闪光灯;闪光设备;试验;性能;定义;摄影;性能试验;性能试验;闪光灯;测定;灯;光学测量;电子闪光设备
【英文主题词】:Definitions;Determination;Electronicflashequipment;Flashequipment;Flashguidenumbers;Flashlamps;Flashlights;Illuminance;Lamps;Lightemission;Luminousintensity;Measurement;Opticalmeasurement;Performance;Performancetesting;Performancetests;Photo-flashlamps;Photoflashsources;Photographicequipment;Photography;Ratings;Testing;Tests
【摘要】:Specifiedaremethodsofmeasurementsandstandardsofperformanceforlightoutput,angleofcoverage,readyindication,recycletimeandnumberofflashesforelectronicflashequipmentofthesingleflashtype,whichisprimarilyintendedtoprovideilluminationforphotographywithcamerasinwhichthecontactsthatcontroltheflashareclosedwhenthecamerashutterisfullyornearlyfullyopen.
【中国标准分类号】:A15
【国际标准分类号】:37_040_10
【页数】:6P.;A4
【正文语种】:英语