ISO/IEC 8882-1-1996 信息技术.系统间远程通信和信息交换X.25DTE一致性测试.第1部分:总则
作者:标准资料网 时间:2024-05-17 17:45:53 浏览:9247
来源:标准资料网
【英文标准名称】:Informationtechnology-Telecommunicationsandinformationexchangebetweensystems-X.25DTEconformancetesting-Part1:Generalprinciples
【原文标准名称】:信息技术.系统间远程通信和信息交换X.25DTE一致性测试.第1部分:总则
【标准号】:ISO/IEC8882-1-1996
【标准状态】:现行
【国别】:国际
【发布日期】:1996-09
【实施或试行日期】:
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO/IECJTC1
【标准类型】:()
【标准水平】:()
【中文主题词】:计算机终端;数据处理设备;信息处理;包交换网络;数据传输;数据处理;信息交换;信息交流;试验;定义
【英文主题词】:
【摘要】:DefinesthetestingofaDTEoperatingattheDataLinkLayerandatthePacketLayerwhenaccessing,bymeansofadedicatedpathconnection,switchedorpermanent,apublicorprivatepacket-switchednetworkconformingtoCCITTRecommendationX.25oranotherDTEconformingtoISO/IEC7776andISO/IEC8208.
【中国标准分类号】:M11
【国际标准分类号】:35_100_01
【页数】:5P;A4
【正文语种】:英语
【英文标准名称】:StandardClassificationSystemforAcrylonitrile-Styrene-Acrylate(ASA)andAcrylonitrile-EPDM-Styrene(AES)PlasticsandAlloysMoldingandExtrusionMaterials
【原文标准名称】:丙烯氰-苯乙烯-丙烯酸盐和丙烯氰-EPDM-苯乙烯塑料和合金模制和挤压材料的标准分类系统
【标准号】:ASTMD6865-2004
【标准状态】:现行
【国别】:
【发布日期】:2004
【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】:D20.15
【标准类型】:(Classification)
【标准水平】:()
【中文主题词】:
【英文主题词】:acrylate;acrylonitrile;ASA;ASAalloys;ASA/PC;classification;classificationsystem;EPDM;ethylene-propylene-diene;linecallout;PC;plasticmaterials;plastics;polycarbonate;styrene
【摘要】:1.1ThisclassificationsystemcoversASAandAESmaterials,andASAandAESalloyssuitableforinjectionmoldingandextrusion.ThisclassificationsystemdoesnotcoverrecycledASAandAESmaterials,andrecycledASAandAESalloys.1.2Thepropertiesincludedinthisstandardarethoserequiredtoidentifythecompositionscovered.Theremaybeotherrequirementsnecessarytoidentifyparticularcharacteristicsimportanttospecializedapplications.ThesemaybespecifiedbyusingthesuffixesasgiveninSection5.1.3Thisclassificationsystemandsubsequentlinecallout(specification)areintendedtoprovideameansofcallingoutplasticmaterialsusedinthefabricationofenditemsorparts.Itisnotintendedfortheselectionofmaterials.Materialselectionshouldbemadebythosehavingexpertiseintheplasticfieldaftercarefulconsiderationofthedesignandtheperformancerequiredofthepart,theenvironmenttowhichitwillbeexposed,thefabricationprocesstobeemployed,thecostsinvolved,andtheinherentpropertiesofthematerialotherthanthosecoveredbythisstandard.Note18212;ThisclassificationsystemandISO6402coverthesamesubjectmatterbutarenottechnicallyequivalent.1.4Thefollowingprecautionarycaveatpertainsonlytothetestmethodportion,Section,ofthisclassificationsystem:Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatoryrequirementspriortouse.
【中国标准分类号】:G31
【国际标准分类号】:83_080_20
【页数】:5P.;A4
【正文语种】:
【英文标准名称】:StandardTestMethodforLaboratoryMeasurementoftheInsertionLossofPipeLaggingSystems
【原文标准名称】:管子护套装置安放损耗的实验室测量用试验方法
【标准号】:ASTME1222-1990(2002)
【标准状态】:现行
【国别】:
【发布日期】:1990
【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】:E33.08
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:管道;声学;建筑声学;热绝缘;安放损耗;建筑;试验;管
【英文主题词】:insertionloss;pipelaggingsystems
【摘要】:Theinsertionlossofapipelaggingsystemdependsuponthelaggingsystemmaterials,themethodusedtoapplythematerials,thepipewallthickness,thesizeandshapeofthebareandlaggedpipe,andthemechanismscausingnoiseradiationfromthepipe.Insertionlossesmeasuredusingthistestmethodshouldbeusedwithsomecaution.Inthelaboratory,measurementsmustbemadeunderreproducibleconditions,butinpracticalusageinthefield,theconditionsthatdeterminetheeffectiveinsertionlossaredifficulttopredictandtheymayleadtoslightlydifferentresults.Insertionlossesmeasuredwiththistestmethodcanbeusedsuccessfullyforacousticaldesignpurposes.Insertionlossesmeasuredwiththistestmethodaremostusefulforpipesandlaggingsystemswhicharesimilartothoseusedinthelaboratoryconfiguration.Thistestmethodmaybeusedtorank-orderpipelaggingsystemsaccordingtoinsertionlossortoestimatethefieldinsertionlossofpipelaggingsystemsinstalledinthefield.Thistestmethodassumesthatpipewallstressesresultingfromdifferentmethodsofsupportingthetestpipeinthelaboratorydonothaveasignificanteffectuponthemeasuredinsertionloss.Pipelaggingsystemstypicallyhavesmallinsertionloss,andsometimesnegativeinsertionloss,atfrequenciesbelow500Hz.Theresultsobtainedatfrequenciesbelow500Hzmaybesomewhaterratic.Soundsourcesusedwiththistestmethodnormallyhavealowfrequencylimitintherangefrom300to500Hz.Forthesereasons,thelowestbandoffrequenciesforwhichresultsarerequirediscenteredat500Hz.1.1Thistestmethodcoversthemeasurementoftheinsertionlossofpipelaggingsystemsunderlaboratoryconditions.1.2AprocedureforaccreditingalaboratoryforpurposesofthistestmethodisgiveninAnnexA1.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:P31
【国际标准分类号】:17_140_20
【页数】:5P.;A4
【正文语种】:
