NF L23-161-1994 航空航天系列.扁平铝合金垫圈.EN2122-89修改件

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标准名称：	2×34Mbit/s数字微波接力通信系统技术要求和测量方法
中标分类：	通信、广播 >> 通信设备 >> 微波通信设备
发布日期：	1996-03-12
实施日期：	1996-03-12
首发日期：	1900-01-01
作废日期：	1900-01-01
起草单位：	邮电部第四研究所
出版社：	中国标准出版社
出版日期：	2004-04-18
页数：	20页
书号：	155066.2-10843

范围：本标准规定了４～８ＧＨｚ２×３４Ｍｂｉｔ／ｓ数字微波接力通信系统进入国家公用电信网时所必需满足的技术要求和测量方法，其它频段的系统也可参照执行。该系统适用于传输电话、传真、数据、数字电视等多种业务。

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【英文标准名称】:StandardTestMethodforDeterminingtheBondStrength(PlyAdhesion)ofGeocomposites
【原文标准名称】:土工合成物粘结强度(层间附着力)测定的标准试验方法
【标准号】:ASTMD7005-2003
【标准状态】:现行
【国别】:
【发布日期】:2003
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:D35.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:bondstrength;geocomposite;laminates;plyadhesionstrength;
【摘要】:Thistestmethodistobeusedasaqualitycontrolorqualityassurancetest.Asamanufacturingqualitycontrol(MQC)test,itwouldgenerallybeusedbythegeocompositeproductmanufacturerorfabricator.Asaconstructionqualityassurance(CQA)test,itwouldbeusedbycertificationorinspectionorganizations.Thistestmethodcanalsobeusedtoverifyiftheadhesionorbondstrengthvariesafterexposuretovariousincubationmediaindurabilityand/orchemicalresistancetesting.Whateveruseistobeassociatedwiththetest,itshouldbeunderstoodthatthisisanindextest.Note28212;TherehavebeennumerousattemptstorelatetheresultsofthistesttotheinterfaceshearingresistanceoftherespectivematerialsdeterminedperTestMethodD5321.Todate,norelationshipshavebeenestablishedbetweenthetwoproperties.TestMethodD7005fordeterminingthebondstrength(plyadhesion)strengthmaybeusedasanacceptancetestofcommercialshipmentsofgeocomposites,butcautionisadvisedsinceinformationaboutbetween-laboratoryprecisionisincomplete.Comparativetestsasdirectedin5.4.1areadvisable.InthecaseofadisputearisingfromdifferencesinreportedtestresultswhenusingtheprocedureinTestMethodD7005foracceptanceofcommercialshipments,thepurchaserandthesuppliershouldfirstconfirmthatthetestswereconductedusingcomparabletestparametersincludingspecimenconditioning,gripfaces,gripsize,etc.Comparativetestsshouldthenbeconductedtodetermineifthereisastatisticalbiasbetweentheirlaboratories.Competentstatisticalassistanceisrecommendedfortheinvestigationofbias.Asaminimum,thetwopartiesshouldtakeagroupoftestspecimensthatareashomogeneousaspossibleandthatarefromalotofthematerialinquestion.Thetestspecimensshouldberandomlyassignedtoeachlaboratoryfortesting.TheaverageresultsfromthetwolaboratoriesshouldbecomparedtotheStudent'st-testforunpaireddataandanacceptableprobabilitylevelchosenbythetwopartiesbeforethetestingisbegun.Ifabiasisfound,eitheritscausemustbefoundandcorrectedorthepurchaserandsuppliermustagreetointerpretfuturetestresultsinthelightoftheknownbias.RefertoPracticeD2905,Table1.1.1Ithasbeenwidelydiscussedintheliteraturethatbondstrengthofflexiblemulti-plymaterialsisdifficulttomeasurewithcurrenttechnology.Theaboveisrecognizedandaccepted,sinceallknownmethodsofmeasurementincludetheforcerequiredtobendtheseparatedlayers,inadditiontothatrequiredtoseparatethem.However,usefulinformationcanbeobtainedwhenonerealizesthatthebendingforceisincludedandthatdirectcomparisonbetweendifferentmaterials,orevenbetweenthesamematerialsofdifferentthickness,cannotbemade.Also,conditioningthataffectsthemodulioftheplieswillbereflectedinthebondstrengthmeasurement.1.2Thisindextestmethoddefinesaprocedureforcomparingthebondstrengthorplyadhesionofgeocomposites.Thefocusisongeotextilesbondedtogeonetsorothertypesofdrainagecores;forexample,geomats,geospacers,etc.Otherpossibleusesaregeotextilesadheredorbondedtothemselves,geomembranes,geogrids,orotherdissimilarmaterials.Variousprocessescanmakesuchlaminates:adhesives,thermalbonding,stitchbonding,needling,spreadcoating,etc.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareprovidedforinformationpurposesonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthiss......
【中国标准分类号】:W59
【国际标准分类号】:59_080_70
【页数】:3P.;A4
【正文语种】: