ISO 2690-1973 仪表用未录磁带.物理特性和试验方法
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【英文标准名称】:Unrecordedmagnetictapesforinstrumentationapplications;Physicalpropertiesandtestmethods
【原文标准名称】:仪表用未录磁带.物理特性和试验方法
【标准号】:ISO2690-1973
【标准状态】:作废
【国别】:国际
【发布日期】:1973-02
【实施或试行日期】:
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO/IEC/JTC1
【标准类型】:()
【标准水平】:()
【中文主题词】:数据存储装置;未用媒体;数据媒体;仪表记录;物理性能;试验;数据处理;特性;储存;信息处理;磁带
【英文主题词】:datastoragedevices;datamedia;storage;magnetictapes;informationprocessing;properties;tests;instrumentationrecording;dataprocessing;testing;physicalproperties;virginmedia
【摘要】:
【中国标准分类号】:G83;G82
【国际标准分类号】:7020
【页数】:2P;A4
【正文语种】:英语
【英文标准名称】:Textilefloorcoverings-Methodsfordeterminationofmass
【原文标准名称】:铺地织物质量的测定方法
【标准号】:ISO8543-1998
【标准状态】:现行
【国别】:国际
【发布日期】:1998-05
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC38
【标准类型】:()
【标准水平】:()
【中文主题词】:试验;试验;测定;地板覆盖物;质量(物质);纺织材料;定义;铺地织物
【英文主题词】:Definitions;Determination;Floorcoverings;Mass;Testing;Tests;Textilefloorcoverings;Textiles
【摘要】:ThisInternationalStandardspecifiesmethodsforthedeterminationofthetotalmassperunitarea,totalpilemassperunitarea,andmassofpileperunitareaabovethesubstrate,andforthecalculationofmeasuredsurfacepiledensityandmeasuredpilefibrevolumeratio,oftextilefloorcoverings.
【中国标准分类号】:W55
【国际标准分类号】:59_080_60
【页数】:9P;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodfor(AnalyticalProcedure)forDeterminingTransmissivityandStorageCoefficientofNonleakyConfinedAquifersbytheTheisNonequilibriumMethod
【原文标准名称】:非平衡法测定非越流性有侧限的蓄水层透射系数及储存系数的标准试验方法(分析程序)
【标准号】:ASTMD4106-1996(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:1996
【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】:D18.21
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:aquifertests;aquifers;controlwells;groundwater;hydraulicconductivity;observationwells;storagecoefficient;transmissivity;Aquifers;Coefficientofstorage;Confinedaquifers;Controlwells;Fieldtesting--groundwater/aquifers;Groundwater;H
【摘要】:Assumptions:Welldischargesataconstantrate,Q.Wellisofinfinitesimaldiameterandfullypenetratestheaquifer.Thenonleakyaquiferishomogeneous,isotropic,andaeriallyextensive.Anonleakyaquiferreceivesinsignificantcontributionofwaterfromconfiningbeds.Dischargefromthewellisderivedexclusivelyfromstorageintheaquifer.ThegeometryoftheassumedaquiferandwellconditionsareshowninFig.1.ImplicationsofAssumptions:Implicitintheassumptionsaretheconditionsofradialflow.Verticalflowcomponentsareinducedbyacontrolwellthatpartiallypenetratestheaquifer,thatis,thewellisnotopentotheaquiferthroughitsfullthickness.Ifthecontrolwelldoesnotfullypenetratetheaquifer,thenearestpiezometerorpartiallypenetratingobservationwellshouldbelocatedatadistance,r,beyondwhichverticalflowcomponentsarenegligible,whereaccordingtoReed(2):Thissectionappliestodistance-drawdowncalculationsoftransmissivityandstoragecoefficientandtime-drawdowncalculationsofstoragecoefficient.Ifpossible,computetransmissivityfromtime-drawdowndatafromwellslocatedwithinadistance,r,ofthepumpedwellusingdatameasuredaftertheeffectsofpartialpenetrationhavebecomeconstant.ThetimeatwhichthisoccursisgivenbyHantush(3)by:Fullypenetratingobservationwellsmaybeplacedatlessthandistancerfromthecontrolwell.Observationwellsmaybeonthesameoronvariousradiallinesfromthecontrolwell.TheTheismethodassumesthecontrolwellisofinfinitesimaldiameter.Also,itassumesthatthewaterlevelinthecontrolwellisthesameasintheaquifercontiguoustothewell.Inpracticetheseassumptionsmaycauseadifferencebetweenthetheoreticaldrawdownandfieldmeasurementsofdrawdownintheearlypartofthetestandinandnearthecontrolwell.Controlwellstorageisnegligibleafteratime,t,givenbytheEq6afterWeeks(4).where:rc
【中国标准分类号】:P13
【国际标准分类号】:93_160
【页数】:5P.;A4
【正文语种】:英语
