DIN EN 300449-2002 通路和终端(AT).高质量音频带宽双线模拟租用专线(A2S).连接特性和网络接口表示

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【英文标准名称】:AccessandTerminals(AT)-Specialqualityvoicebandwidth2-wireanalogueleasedline(A2S)-Connectioncharacteristicsandnetworkinterfacepresentation(EndorsementoftheEnglishversionEN300449V1.2.1(2001-07)asGermanStandard)
【原文标准名称】:通路和终端(AT).高质量音频带宽双线模拟租用专线(A2S).连接特性和网络接口表示
【标准号】:DINEN300449-2002
【标准状态】:现行
【国别】:德国
【发布日期】:2002-01
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:专业网络;模拟;电信;规范(验收);特性;网络接口;通信网;电气工程;远程通信;终端装置;通信传输线路;接口;商务电信;通信设备;租用专线
【英文主题词】:
【摘要】:Thedocumentspecifiesrequirementsinthetelecommunicationssector.
【中国标准分类号】:M30
【国际标准分类号】:33_040_50
【页数】:1P;A4
【正文语种】:德语


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【英文标准名称】:Methodsoftestforphosphoricacid(orthophosphoricacid)forindustrialuse-Determinationofsolublesulphatecontent(potentiometricmethod)
【原文标准名称】:工业用磷酸(正磷酸)试验方法.第13部分:可溶性硫酸盐含量测定(电位测量法)
【标准号】:BS4258-13-1990
【标准状态】:现行
【国别】:英国
【发布日期】:1990-07-31
【实施或试行日期】:1990-07-31
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:电位测量法;化学分析和试验;含量测定;试验条件;沉淀法;工业的;硫酸盐;磷酸
【英文主题词】:Chemicalanalysisandtesting;Determinationofcontent;Industrial;Phosphoricacid;Potentiometricmethods;Precipitationmethods;Sulphates;Testingconditions
【摘要】:Applicabletoproductshavingsulphatecontentsofnotlessthan0.4%bymass.
【中国标准分类号】:G11
【国际标准分类号】:71_060_30
【页数】:12P.;A4
【正文语种】:英语


【英文标准名称】:StandardTestMethodforWaterMassperUnitVolumeofSoilandRockIn-PlacebytheNeutronDepthProbeMethod
【原文标准名称】:用中子深探针法对地表土壤和岩石中单位体积含水量的标准试验方法
【标准号】:ASTMD5220-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:D18.08
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:depthprobe;in-placewatercontent;insituwatercontent;neutronprobe;nuclearmethods;watermassperunitvolume;Calibration--soil/rockanalysisinstrumentation;Depthprofiling;Massperunitvolume;Neutronradiation--soil;Nondestructiveevalua
【摘要】:Thistestmethodisusefulasarapid,nondestructivetechniqueforthecalculationofthein-placewatermassperunitvolumeofsoilandrockatdesireddepthsbelowthesurface.Thistestmethodisusefulforinformationalandresearchpurposes.ItshouldonlybeusedforqualitycontrolandacceptancetestingwhencorrelatedtoactualwatermassperunitvolumeusingproceduresandmethodsdescribedinA1.2.3.Thenon-destructivenatureofthistestmethodallowsrepetitivemeasurementstobemadeatasingletestlocationforstatisticalanalysisandtomonitorchangesovertime.ThefundamentalassumptionsinherentinthistestmethodarethatthematerialundertestishomogeneousandhydrogenpresentisintheformofwaterasdefinedbyTestMethodD2216.Note18212;Thequalityoftheresultproducedbythisstandardtestmethodisdependentonthecompetenceofthepersonnelperformingit,andthesuitabilityoftheequipmentandfacilitiesused.AgenciesthatmeetthecriteriaofPracticeD3740aregenerallyconsideredcapableofcompetentandobjectivetesting/sampling/inspection,andthelike.UsersofthisstandardarecautionedthatcompliancewithPracticeD3740doesnotinitselfassurereliableresults.Reliableresultsdependonmanyfactors;PracticeD3740providesameansofevaluatingsomeofthosefactors.1.1Thistestmethodcoversthecalculationofthewatermassperunitvolumeofsoilandrockbythermalizationorslowingoffastneutronswheretheneutronsourceandthethermalneutrondetectorareplacedatthedesireddepthintheboredholelinedbyanaccesstube(seeNote3).1.1.1ForlimitationsseeSection6onInterferences.1.2Thewatermassperunitvolume,expressedasmassperunitvolumeofthematerialundertest,iscalculatedbycomparingthethermalneutroncountratewithpreviouslyestablishedcalibrationdata(seeAnnexA1).1.3Aprecisionstatementhasnotbeendevelopedforthisstandardatthistime.Therefore,thisstandardshouldnotbeusedforacceptanceorrejectionofamaterialforpurchasingpurposesunlesscorrelatedtootheracceptedASTMmethods.1.4ThevaluesexpressedinSIunitsareregardedasthestandard.Theinch-poundunitsgiveninparenthesesmaybeapproximateandareprovidedforinformationonly.1.5AllobservedandcalculatedvaluesshallconformtotheguideforsignificantdigitsandroundingestablishedinPracticeD6026.1.5.1Theproceduresusedtospecifyhowdataarecollected,recorded,andcalculatedinthisstandardareregardedastheindustrystandard.Inaddition,theyarerepresentativeofthesignificantdigitsthatshouldgenerallyberetained.Theproceduresuseddonotconsidermaterialvariation,purposeforobtainingthedata,specialpurposestudies,oranyconsiderationsfortheuserx2019;sobjectives;anditiscommonpracticetoincreaseorreducesignificantdigitsofreporteddatatobecommensuratewiththeseconsiderations.Itisbeyondthescopeofthisstandardtoconsidersignificantdigitsusedinanalysismethodsforengineeringdesign.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.SpecifichazardsaregiveninSection8.
【中国标准分类号】:P13
【国际标准分类号】:13_080_40
【页数】:7P.;A4
【正文语种】:英语