DIN V I-ETS 300032-1993 欧洲数字移动电话远程通信系统(阶段1):调制;英文版本I-ETS300032:1992
时间:2024-05-23 18:28:02 来源: 标准资料网 作者：标准资料网 阅读：9756
【英文标准名称】:Europeandigitalcellulartelecommunicationssystem(phase1);modulation;englishversionI-ETS300032:1992
【原文标准名称】:欧洲数字移动电话远程通信系统(阶段1):调制;英文版本I-ETS300032:1992
【标准号】:DINVI-ETS300032-1993
【标准状态】:作废
【国别】:德国
【发布日期】:1993-01
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:无线电通信;数字连接;移动通信系统;无线电控制;电话系统;调制;无线电发射机;欧洲的;电信传输法;无线电电路;传播学;电信;数字电路;调制类型;数据传送;移动无线电通信系统;无线电设备
【英文主题词】:Communication;Datatransfer;Digitalcircuits;Digitalconnections;European;Mobilecommunicationsystems;Mobileradiosystems;Modulation;Radiocircuits;Radiocontrol;Radioequipment;Radiotransmitters;Radiocommunication;Telecommunication;Telecommunicationtransmissionmethods;Telecommunications;Telephonesystems;Typeofmodulation
【摘要】:Thedocumentdealswiththemodulationformatwithinthedigitalcellulartelecommunicationssystem.
【中国标准分类号】:M11
【国际标准分类号】:33_070_50
【页数】:8P.;A4
【正文语种】:德语
【英文标准名称】:StandardTestMethodforSimulatedDropofLoadedContainersbyShockMachines
【原文标准名称】:冲击试验机测定加载容器模拟跌落的标准试验方法
【标准号】:ASTMD5487-1998(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:1998
【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】:D10.21
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:criticalelement;droptest;packagingcontainer;shock;shockmachine;velocity;Bags;Criticalelement;Droptests--shippingcontainers;Packing/packagingmaterials/systems;Sacks;Shippingcontainers/materials/applications;Shockabsorption/atten
【摘要】:Shippingcontainersandtheinteriorpackagingmaterialsareusedtoprotecttheircontentsfromthehazardsencounteredinhandling,transportation,andstorage.Shockisoneofthemoretroublesomeofthesehazards.Free-falldroptesting,whileeasytoperform,oftenunderstressesthetestspecimenbysubjectingittodropswhicharenotperpendiculartothedroppingsurface.Note18212;Forexample,testinghasshownthatnon-perpendiculardrops,2x00B0;offperpendicularity,resultin8%loweraccelerationintothetestspecimenresultingfromtheimpactenergydispersinginseveralaxes.Controlledshockinputbyshockmachinesprovidesaconvenientmethodforevaluatingtheabilityofshippingcontainers,interiorpackagingmaterials,andcontentstowithstandshocks.Simulatedfree-falldroptestingofpackagesystems,whichhavecriticalelements,hasproducedgoodresultswherethefrequencyoftheshockpulseisatleastthreetimesthatofthepackagesystem''snaturalfrequency.Asinmostmechanicalshocktestprocedures,fixturingofthepackageontheshocktestmachinemayhavesignificantinfluenceonthetestresults.Typically,packageswillbefirmlyheldonthetablebysecuringsometypeofcrossmember(s)acrossthetopofthepackage.Careshouldbetakenthatanypressureresultingfromsuchfixturingshouldbeminimal,particularlywhenthecontainerbeingtestediscorrugatedorsomeothersimilarmaterial.Incaseswherelow-acceleration,long-durationresponsesareanticipated,anyfixturingcanpotentiallyinfluencepackageditemresponseandcanpossiblyalteranycorrelationbetweenthistestmethodandfree-falldroptesting.Wheresuchcorrelationisdesired,thepackagecanbetestedwithoutitbeingfixeddirectlytothetable.Notethatinsuchcircumstances,theshippingcontainercanvigorouslyreboundfromthetableandcan,ifnototherwisecontrolled,presentasafetyproblemforoperators.Fixingtheshippingcontainertotheshockmachinetableismostoftenrecommendedforsafetyandconvenience,butaccuracyandprecisionofthistestmethodshouldnotbecompromisedbysuchfixturing.Note28212;Arigidpackagesystemwithanaturalfrequencyabove83Hzrequiresashockpulseshorterthanthe2-ms(nominal)durationcurrentlyavailablewithmanyoftoday''sshockmachines:where:ds
【中国标准分类号】:A82
【国际标准分类号】:55_180_10
【页数】:4P.;A4
【正文语种】:英语