EN 10257-1-2011 电力电缆或通信电缆铠装用镀锌或锌合金非合金钢丝.第1部分:地面电缆.德文版本EN10257-1-2011
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【英文标准名称】:Zincorzincalloycoatednon-alloysteelwireforarmouringeitherpowercablesortelecommunicationcables-Part1:Landcables;GermanversionEN10257-1:2011
【原文标准名称】:电力电缆或通信电缆铠装用镀锌或锌合金非合金钢丝.第1部分:地面电缆.德文版本EN10257-1-2011
【标准号】:EN10257-1-2011
【标准状态】:现行
【国别】:
【发布日期】:2012-02
【实施或试行日期】:
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Armouredcables;Cables;Coatings;Communicationcables;Currentconduction;Definitions;Dimensions;Electricalresistance;Low-carbonsteels;Manufacturing;Marking;Mechanicalproperties;Orderindications;Packages;Powercables;Production;Properties;Quality;Reinforcement;Specification(approval);Steelwires;Telecommunications;Testing;Tolerances(measurement);Unalloyed;Underground;Zinc;Zincalloys;Zinccoatings
【摘要】:
【中国标准分类号】:H49;K13
【国际标准分类号】:77_140_65
【页数】:12P;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodforDeterminingTransmissivityandStorageCoefficientofBounded,Nonleaky,ConfinedAquifers
【原文标准名称】:测定有限的,非越流性,封闭含水层透射率和蓄水系数的标准试验方法
【标准号】:ASTMD5270-1996(2002)
【标准状态】:现行
【国别】:
【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(ASTM)
【起草单位】:D18.21
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:储存;渗透率;地下水;水常规;试验
【英文主题词】:
【摘要】:Assumptions:5.1.1Thewelldischargesataconstantrate.5.1.2Wellisofinfinitesimaldiameterandisopenthroughthefullthicknessoftheaquifer.5.1.3Thenonleakyconfinedaquiferishomogeneous,isotropic,andareallyextensiveexceptwherelimitedbylinearboundaries.5.1.4Dischargefromthewellisderivedinitiallyfromstorageintheaquifer;later,movementofwatermaybeinducedfromaconstant-headboundaryintotheaquifer.5.1.5ThegeometryoftheassumedaquiferandwellareshowninFig.1orFig.2.5.1.6Boundariesareverticalplanes,infiniteinlengththatfullypenetratetheaquifer.Nowaterisyieldedtotheaquiferbyimpermeableboundaries,whereasrechargingboundariesareinperfecthydraulicconnectionwiththeaquifer.5.1.7Observationwellsrepresenttheheadintheaquifer;thatis,theeffectsofwellborestorageintheobservationwellsarenegligible.ImplicationsofAssumptions:5.2.1Implicitintheassumptionsaretheconditionsofafully-penetratingcontrolwellandobservationwellsofinfinitesimaldiameterinaconfinedaquifer.Undercertainconditions,aquifertestscanbesuccessfullyanalyzedwhenthecontrolwellisopentoonlypartoftheaquiferorcontainsasignificantvolumeofwaterorwhenthetestisconductedinanunconfinedaquifer.TheseconditionsarediscussedinmoredetailinTestMethodD4105.5.2.2Incasesinwhichthistestmethodisusedtolocateanunknownboundary,aminimumofthreeobservationwellsisneeded.Ifonlytwoobservationwellsareavailable,twopossiblelocationsoftheboundaryaredefined,andifonlyoneobservationwellisused,acircledescribingallpossiblelocationsoftheimagewellisdefined.5.2.3Theeffectsofaconstant-headboundaryareoftenindistinguishablefromtheeffectsofaleaky,confinedaquifer.Therefore,caremustbetakentoensurethatacorrectconceptualmodelofthesystemhasbeencreatedpriortoanalyzingthetest.SeeGuideD4043.1.1Thistestmethodcoversananalyticalprocedurefordeterminingthetransmissivity,storagecoefficient,andpossiblelocationofboundariesforaconfinedaquiferwithalinearboundary.Thistestmethodisusedtoanalyzewater-levelorheaddatafromoneormoreobservationwellsorpiezometersduringthepumpingofwaterfromacontrolwellataconstantrate.Thistestmethodalsoappliestoflowingartesianwellsdischargingataconstantrate.Withappropriatechangesinsign,thistestmethodalsocanbeusedtoanalyzetheeffectsofinjectingwaterintoacontrolwellataconstantrate.1.2TheanalyticalprocedureinthistestmethodisusedinconjunctionwiththefieldprocedureinTestMethodD4050.1.3Limitations8212;ThevaliduseofthistestmethodislimitedtodeterminationoftransmissivitiesandstoragecoefficientsforaquifersinhydrogeologicsettingswithreasonablecorrespondencetotheassumptionsoftheTheisnonequilibriummethod(seeTestMethodD4106)(see5.1),exceptthattheaquiferislimitedinarealextentbyalinearboundarythatfullypenetratestheaquifer.Theboundaryisassumedtobeeitheraconstant-headboundary(equivalenttoastreamorlakethathydraulicallyfullypenetratestheaquifer)orano-flow(impermeable)boundary(equivalenttoacontactwithasignificantlylesspermeablerockunit).TheTheisnonequilibriummethodisdescribedinTestMethodsD4105andD4106.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.1.5Thi......
【中国标准分类号】:P13
【国际标准分类号】:13_060_10
【页数】:7P.;A4
【正文语种】:
【英文标准名称】:Solidmineralfuels-Determinationoftraceelementscontainedincoals-AASorplasmaemissionmethod.
【原文标准名称】:固体矿物燃料.煤中痕量元素的测定.AAS或等离子体辐射法
【标准号】:NFM03-052-2003
【标准状态】:现行
【国别】:法国
【发布日期】:2003-02-01
【实施或试行日期】:2003-02-05
【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】:
【英文主题词】:
【摘要】:
【中国标准分类号】:D20
【国际标准分类号】:75_160_10
【页数】:10P;A4
【正文语种】:其他
