【英文标准名称】:StandardGuideforConductingaSensitivityAnalysisforaGround-WaterFlowModelApplication
【原文标准名称】:地下水流样品应用的灵敏度分析标准导则
【标准号】:ASTMD5611-1994(2002)
【标准状态】:现行
【国别】:
【发布日期】:1994
【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】:(Guide)
【标准水平】:()
【中文主题词】:计算机;校准;地下;土壤;导则;地下水;取样;水文地质系统;有关材料;灵敏度分析;水流样品应用;水样品
【英文主题词】:calibration;computer;groundwater;modeling;sensitivity;
【摘要】:Afteramodelhasbeencalibratedandusedtodrawconclusionsaboutaphysicalhydrogeologicsystem(forexample,estimatingthecapturezoneofaproposedextractionwell),asensitivityanalysiscanbeperformedtoidentifywhichmodelinputshavethemostimpactonthedegreeofcalibrationandontheconclusionsofthemodelinganalysis.Ifvariationsinsomemodelinputsresultininsignificantchangesinthedegreeofcalibrationbutcausesignificantlydifferentconclusions,thenthemerefactofhavingusedacalibratedmodeldoesnotmeanthattheconclusionsofthemodelingstudyarevalid.Thisguideisnotmeanttobeaninflexibledescriptionoftechniquesofperformingasensitivityanalysis;othertechniquesmaybeappliedasappropriateand,afterdueconsideration,someofthetechniqueshereinmaybeomitted,altered,orenhanced.1.1Thisguidecoverstechniquesthatshouldbeusedtoconductasensitivityanalysisforaground-waterflowmodel.Thesensitivityanalysisresultsinquantitativerelationshipsbetweenmodelresultsandtheinputhydraulicpropertiesorboundaryconditionsoftheaquifers.1.2Afteraground-waterflowmodelhasbeencalibrated,asensitivityanalysismaybeperformed.Examinationofthesensitivityofcalibrationresidualsandmodelconclusionstomodelinputsisamethodforassessingtheadequacyofthemodelwithrespecttoitsintendedfunction.1.3Afteramodelhasbeencalibrated,amodelermayvarythevalueofsomeaspectoftheconditionsapplyingsolelytothepredictionsimulationsinordertosatisfysomedesigncriteria.Forexample,thenumberandlocationsofproposedpumpingwellsmaybevariedinordertominimizetherequireddischarge.Insofarastheseaspectsarecontrollable,variationoftheseparametersispartofanoptimizationprocedure,and,forthepurposesofthisguide,wouldnotbeconsideredtobeasensitivityanalysis.Ontheotherhand,estimatesoffutureconditionsthatarenotcontrollable,suchastherechargeduringapostulateddroughtofunknowndurationandseverity,wouldbeconsideredascandidatesforasensitivityanalysis.1.4Thisguidepresentsthesimplestacceptabletechniquesforconductingasensitivityanalysis.Othertechniqueshavebeendevelopedbyresearchersandcouldbeusedinlieuofthetechniquesinthisguide.1.5Thisguideiswrittenforperformingsensitivityanalysesforground-waterflowmodels.However,thesetechniquescouldbeappliedtoothertypesofground-waterrelatedmodels,suchasanalyticalmodels,multi-phaseflowmodels,non-continuum(karstorfractureflow)models,ormasstransportmodels.1.6Thisguideisoneofaseriesonground-watermodelingcodes(software)andtheirapplications,suchasGuideD5447andGuideD5490.Otherstandardshavebeenpreparedonenvironmentalmodeling,suchasPracticeE978.1.7Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.TheSIunitsgiveninparenthesesareforinformationonly.1.8Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.1.9Thisguideoffersanorganizedcollectionofinformationoraseriesofoptionsanddoesnotrecommendaspecificcourseofaction.Thisdocumentcannotreplaceeducationorjudgement.Notallaspectsofthisguidemaybeapplicalbeinallcircumstances.ThisASTMstandardisnotintendedtorepresentorreplacethestandardofcarebywhichtheadequacyofagivenprofessionalservicemustbejudged,norshouldthisuniqueaspects.Theword"Standard"inthetitleofthisdocumentmeansonlythatthedocumenthasbeenapp......
【中国标准分类号】:P12
【国际标准分类号】:13_060_10
【页数】:5P.;A4
【正文语种】:


【英文标准名称】:Edisonscrewlampholderspositionofholderthreadinrelationtocentralcontactofthelampholder
【原文标准名称】:带电工螺纹螺旋灯座.螺纹灯座的位置对着中间触点
【标准号】:DIN49673-1971
【标准状态】:作废
【国别】:德国
【发布日期】:1971-08
【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】:埃德森螺纹灯座;螺纹
【英文主题词】:threads;edisonscrewlampholders;screwthreads
【摘要】:
【中国标准分类号】:K74
【国际标准分类号】:1940
【页数】:1P;A4
【正文语种】:德语