ANSI/SCTE 79-3-2011 DOCSIS2.0+IPv6电缆调制解调器标准
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来源:标准资料网
【英文标准名称】:DOCSIS2.0+IPv6CableModemStandard
【原文标准名称】:DOCSIS2.0+IPv6电缆调制解调器标准
【标准号】:ANSI/SCTE79-3-2011
【标准状态】:现行
【国别】:美国
【发布日期】:2011
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Cablecommunication;Cableddistributionsystems;Communicationtechnology;Distributionsystems;Informationtechnology;Interfaces;InternetProtocol;IP;Modems;Supports;Transmissiontechnique
【摘要】:ThisstandardisanextensiontotheDOCSIS2.0familyofspecifications,whichdefinehigh-speeddata-over-cablesystems.ForanoverviewofDOCSIS2.0,refertoANSI/SCTE79-1.ThatstandardrequirestheCMtosupportIPversion4forprovisioningandmanagement.ThisstandardprovidesIPv6provisioningandmanagementfunctionalityforDOCSIS2.0CMs,connectedIPv6eSAFEs,andexternalCPEdevices.ThetermDOCSIS2.0+IPv6CMisusedtorepresentsuchCableModems.
【中国标准分类号】:M31
【国际标准分类号】:33_060_40
【页数】:
【正文语种】:英语
【英文标准名称】:StandardTestMethodsforWaterPermeabilityofGeotextilesbyPermittivity
【原文标准名称】:通过介电常数测试土工合成织物的水渗透性的标准试验方法
【标准号】:ASTMD4491-1999a(2009)
【标准状态】:现行
【国别】:美国
【发布日期】:1999
【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】:D35.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:constanthead;fallinghead;geotextiles;permeability;permittivity;Constantheadtesting;Drainagematerials/systems;Fallingheadtest;Flowandflowrate--soil/rock/relatedmaterials;Geosynthetics;Hydraulicconductivity/transmissivity;Liquids-
【摘要】:Thesetestmethodsareconsideredsatisfactoryforacceptancetestingofcommercialshipmentsofgeotextilessincethemethodshavebeenusedextensivelyinthetradeforacceptancetesting.Incaseofadisputearisingfromdifferencesinreportedtestresultswhenusingthesetestmethodsforacceptancetestingofcommercialshipments,thepurchaserandthesuppliershouldconductcomparativeteststodetermineifthereisastatisticalbiasbetweentheirlaboratories.Competentstatisticalassistanceisrecommendedfortheinvestigationofbias.Asaminimum,thetwopartiesshouldtakeagroupoftestspecimensthatareashomogeneousaspossibleandthatarefromalotofmaterialofthetypeinquestion.Thetestspecimensshouldthenberandomlyassignedinnumberstoeachlaboratoryfortesting.TheaverageresultsfromthetwolaboratoriesshouldbecomparedusingStudent''st-testforunpaireddataandanacceptableprobabilitylevelchosenbythetwopartiesbeforethestartoftesting.Ifabiasisfound,eitheritscausemustbefoundandcorrected,orthepurchaserandthesuppliermustagreetointerpretfuturetestresultsinlightoftheknownbias.Permittivityisanindicatorofthequantityofwaterthatcanpassthroughageotextileinanisolatedcondition.Astherearemanyapplicationsandenvironmentalconditionsunderwhichageotextilemaybeused,careshouldbetakenwhenattemptingtoapplytheresultsofthesetestmethodstothefieldperformanceofageotextile.Sincetherearegeotextilesofvariousthicknessesinuse,evaluationintermsoftheirDarcycoefficientofpermeabilitiescanbemisleading.Inmanyinstances,itismoresignificanttoevaluatethequantityofwaterthatwouldpassthroughageotextileunderagivenheadoveraparticularcross-sectionalarea;thisisexpressedaspermittivity.Ifthepermeabilityofanindividualgeotextileisofimportance,anominalcoefficientofpermeability,asrelatedtogeotechnicalengineering,maybecomputed.Bymultiplyingpermittivitytimesthenominalthicknessofthegeotextile,asdeterminedbyTestMethodD5199,thenominalcoefficientofpermeabilityisobtained.Note28212;Thenominalthicknessisusedasitisdifficulttoevaluatethepressureonthegeotextileduringthetest,therebymakingitdifficulttodeterminethethicknessofthefabricunderthesetestconditions.1.1Thesetestmethodscoverproceduresfordeterminingthehydraulicconductivity(waterpermeability)ofgeotextilesintermsofpermittivityunderstandardtestingconditions,intheuncompressedstate.Includedaretwoprocedures:theconstantheadmethodandthefallingheadmethod.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Theinch-poundunitsstatedinparenthesesareprovidedforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:W59
【国际标准分类号】:59_080_70
【页数】:6P.;A4
【正文语种】:英语
【英文标准名称】:Self-lockinganchornuts,countersunktype,twolugswithcountersunkrivetholes.Simthread(rech.).
【原文标准名称】:带沉头铆钉孔的两耳自锁沉头防松螺母.Sim螺纹(rech.)
【标准号】:NFL22-534-1975
【标准状态】:现行
【国别】:法国
【发布日期】:1975-06-01
【实施或试行日期】:1975-06-02
【发布单位】:法国标准化协会(AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:航空运输;埋头紧固件;规范;系紧螺母;名称与符号;螺母;飞行器设备;尺寸;飞行器部件;尺寸公差;埋头螺母;自锁紧螺母;防松螺母
【英文主题词】:
【摘要】:
【中国标准分类号】:V20
【国际标准分类号】:49_030_30
【页数】:2P;A4
【正文语种】:其他
