【英文标准名称】:InformationTechnology-TestMethodsforMediaCharacteristics-90mmReadOnlyandRewritableM.O.OpticalDiskDataStorageCartridgeswithContinuousCompositeServo(CCS)ReplacesANSIX3.244-1995
【原文标准名称】:信息技术.介质特性的试验方法.带连续组合伺服装置(CCS)的90mm只读和可重写的M.O.盒式数据存储光盘代替ANSIX3.244-1995
【标准号】:ANSIINCITS244-1995
【标准状态】:现行
【国别】:美国
【发布日期】:1995-01-01
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:Specifiestestmethodsof90mmReadOnlyandRewritableM.O.OpticalDiskCartridgeswithCCSusedforinformationprocessingsystemsandforinformationstorage.
【中国标准分类号】:L64
【国际标准分类号】:35_220_30
【页数】:
【正文语种】:英语


【英文标准名称】:StandardGuideforDescribingtheFunctionalityofaGround-WaterModelingCode
【原文标准名称】:描述地下水成型准则功能的标准指南
【标准号】:ASTMD6033-1996(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】:(Guide)
【标准水平】:()
【中文主题词】:
【英文主题词】:codeselection;ground-water;ground-watermodeling;modeltypes;softwarefunctionality;Classification;Computermodel;Functionality;Ground-watermodel;Software--groundwateranalysisapplications
【摘要】:Ground-watermodelinghasbecomeanimportantmethodologyinsupportoftheplanninganddecision-makingprocessesinvolvedinground-watermanagement.Ground-watermodelsprovideananalyticalframeworkforobtaininganunderstandingofthemechanismsandcontrolsofground-watersystemsandtheprocessesthatinfluencetheirquality,especiallythosecausedbyhumaninterventioninsuchsystems.Increasingly,modelsareanintegralpartofwaterresourcesassessment,protectionandrestorationstudies,andprovideessentialandcost-effectivesupportforplanningandscreeningofalternativepolicies,regulations,andengineeringdesignsaffectinggroundwater.Therearemanydifferentground-watermodelingcodesavailable,eachwiththeirowncapabilities,operationalcharacteristics,andlimitations.Ifmodelingisconsideredforaproject,itisimportanttodetermineifaparticularcodeisappropriateforthatproject,orifacodeexiststhatcanperformthesimulationsrequiredintheproject.Inpractice,itisoftendifficulttodeterminethecapabilities,operationalcharacteristics,andlimitationsofaparticularground-watermodelingcodefromthedocumentation,orevenimpossiblewithoutactualrunningthecodeforsituationsrelevanttotheprojectforwhichacodeistobeselectedduetoincompleteness,poororganization,orincorrectnessofacode''sdocumentation.Systematicandcomprehensivedescriptionofacode''sfeaturesbasedonaninformativeclassificationprovidesthenecessarybasisforefficientselectionofaground-watermodelingcodeforaparticularprojectorforthedeterminationthatnosuchcodeexists.Thisguideisintendedtoencouragecorrectness,consistency,andcompletenessinthedescriptionofthefunctions,capabilities,andlimitationsofanexistingground-watermodelingcodethroughtheformulationofacodeclassificationsystemandthepresentationofcodedescriptionguidelines.1.1Thisguidepresentsasystematicapproachtotheclassificationanddescriptionofcomputercodesusedinground-watermodeling.Duetothecomplexnatureoffluidflowandbioticandchemicaltransportinthesubsurface,manydifferenttypesofground-watermodelingcodesexist,eachhavingspecificcapabilitiesandlimitations.Determiningthemostappropriatecodeforaparticularapplicationrequiresathoroughanalysisoftheproblemathandandtherequiredandavailableresources,aswellasadetaileddescriptionofthefunctionalityofpotentiallyapplicablecodes.1.2Typically,ground-watermodelingcodesarenonparameterizedmathematicaldescriptionsofthecausalrelationshipsamongselectedcomponentsoftheaqueoussubsurfaceandthechemicalandbiologicalprocessestakingplaceinthesesystems.Manyofthesecodesfocusonthepresenceandmovementofwater,dissolvedchemicalspeciesandbiota,eitherunderfullyorpartiallysaturatedconditions,oracombinationoftheseconditions.Othercodeshandlethejointmovementofwaterandotherfluids,eitherasagasoranonaqueousphaseliquid,orboth,andthecomplexphasetransfersthatmighttakeplacebetweenthem.Somecodeshandleinteractionsbetweentheaqueoussubsurface(forexample,aground-watersystem)andothercomponentsofthehydrologicsystemorwithnonaqueouscomponentsoftheenvironment.1.3Theclassificationprotocolisbasedonananalysisofthemajorfunctiongroupspresentinground-watermodelingcodes.Additionalcodefunctionsandfeaturesmaybeidentifiedindeterminingthefunctionalityofacode.Acompletedescriptionofacode''sfunctionalitycontainsthedetailsnecessarytounderstandthecapabilitiesandpotentialuseofaground-watermodelingcode.Tablesareprovidedwithexplanationsandexamplesoffunctionsandfunctiongroupsforselectedtypesofcodes.Consistentuseofthedesc......
【中国标准分类号】:P12
【国际标准分类号】:13_060_10
【页数】:10P.;A4
【正文语种】:英语