NF C23-555-1992 可燃性气体的检测和测量电气仪器.空气中沼气含量最高可达5%的I组电气仪器指示的性能要求
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【英文标准名称】:Electicalapparatusforthedetectionandmeasurementofcombustiblegases.PerformancerequirementsforgroupIapparatusindicatingupto5percent(V/V)methaneinair.
【原文标准名称】:可燃性气体的检测和测量电气仪器.空气中沼气含量最高可达5%的I组电气仪器指示的性能要求
【标准号】:NFC23-555-1992
【标准状态】:作废
【国别】:法国
【发布日期】:1992-07-01
【实施或试行日期】:1992-07-05
【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】:气体;规范(验收);试验方法;测量仪器;防爆;电气器具;电驱动装置;燃料;工作性能;电气工程;燃烧气体;气体燃料;矿;可燃性环境;测试方法;煤气;沼气;气体检测器;电气设备;易燃材料;测量范围;探测器;浓度(化学);甲烷
【英文主题词】:
【摘要】:
【中国标准分类号】:N56
【国际标准分类号】:13_320
【页数】:9P;A4
【正文语种】:其他
基本信息
| 标准名称： | 微调圆盘车刀刀杆尺寸 |
| 中标分类： |
机械 >>
金属切削机床 >>
机床辅具与附件 |
| 替代情况： | 被JB/T 3411.4-99代替 |
| 发布日期： | |
| 实施日期： | 1992-10-01 |
| 首发日期： | |
| 作废日期： | |
| 出版日期： | |
| 页数： | 2页 |
适用范围
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前言
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目录
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引用标准
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所属分类： 机械 金属切削机床 机床辅具与附件
【英文标准名称】:StandardGuideforDisplayingResultsofChemicalAnalysesofGroundWaterforMajorIonsandTraceElements-DiagramsBasedonDataAnalyticalCalculations
【原文标准名称】:基于数据分析计算的痕量元素示意图和主要离子的地下水化学分析结果表示的标准指南
【标准号】:ASTMD5877-1995(2005)
【标准状态】:现行
【国别】:
【发布日期】:1995
【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】:水分析图解;地下水质量;化学离子;图形表示;化学分析;地下水;统计分析
【英文主题词】:Chemicalanalysis;chemicalions;graphicaldisplay;groundwater;groundwaterquality;statisticalanalysis;water-analysisdiagram
【摘要】:1.1Thisguidecoversmethodsthatgraphicallydisplaychemicalanalysesofmultipleground-watersamples,discretevaluesandalsothosereducedtocomprehensivesummariesorparameters.Detailsrequiredbytheinvestigatortofullyusethemethodsarefoundinthelistedreferences.Themethodsincludedinthisguidearemanyofthegraphicalproceduresthatwerenotdiscussedintwopreviousguides,GuidesD5738andD5754.Note18212;Thegraphicmethodsinthisguideapplytobothrawandtransformeddata,forexample,unalteredmedians,maximums,andminimumsandtransformedmeans,square-roots,frequencydistributions,andsoforth.Themethodsareoftencomputationalintensive,requiringtheuseofadigitalcomputer.Somegraphicalmethodsillustratetheresultsofthestatisticalanalysisofasampledataset.Forexample,boxplotsaregraphicalportrayalsofthemaximum,minimum,median,25thpercentile,and75thpercentileofonevariable,suchasthechlorideionfromagroupofchemicalanalyses.Besideschemicalcomponents,othervariablesthatmaybeplottedtoshowaninterdependencewithwaterchemistryincludetime,distance,andtemperature.1.2Thisguideondiagramsbasedondataanalyticalcalculationsisthethirdofseveraldocumentstoinformthehydrologistsandgeochemistsabouttraditionalgraphicalmethodsfordisplayingground-waterchemicaldata.Note28212;Theinitialguidedescribedthecategoryofwater-analysisdiagramsthatusetwo-dimensionaltrilineargraphstodisplay,onasinglediagram,thecommonchemicalcomponentsfromtwoormoreanalysesofnaturalgroundwater.1.2.1Thesecondguidedescribedthecategoryofwater-analysisdiagramsthatusepatternandpictorialmethodsasabasisfordisplayingeachoftheindividualchemicalcomponentsdeterminedfromtheanalysisofasinglesampleofnaturalgroundwater.1.3Thisguidepresentsacompilationofdiagramsthatallowsfortransformationofnumericaldataintovisual,usableforms.Itisnotaguidetoselectionoruse.Thatchoiceisprogramorprojectspecific.1.4Manygraphictechniqueshavebeendevelopedbyinvestigatorstoillustratetheresultsofthedataanalyticalcomputationstoassistinsummarizingandinterpretingrelateddatasets.Inthisguide,selectedgraphicalmethodsareillustratedusingground-waterchemistrydata.1.5Thebasicororiginalformatofeachofthegraphicaltechniquesgiveninthisguidehasbeenmodifiedinseveralways,largelydependinguponthedataanalyticaltechniquesusedbytheinvestigators.Severalminormodificationsarementioned,somesignificantrevisionsarediscussedinmoredetail.1.6Notationshavebeenincorporatedwithinmanydiagramsillustratedinthisguidetoassistthereaderinunderstandinghowthediagramsareconstructed.Thesenotationswouldnotberequiredonadiagramdesignedforinclusioninaprojectdocument.Note38212;UseoftradenamesinthisguideisforidentificationpurposesonlyanddoesnotconstituteendorsementbyASTM.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.1.8Thisguideoffersanorganizedcollectionofinformationoraseriesofoptionsanddoesnotrecommendaspecificcourseofaction.Thisdocumentcannotreplaceeducationorexperienceandshouldbeusedinconjunctionwithprofessionaljudgment.Notallaspectsofthisguidemaybeapplicableinallcircumstances.ThisASTMstandardisnotintendedtorepresentorreplacethestandardofcarebywhichtheadequacyofagivenprofessionalservicemustbejudged,norshouldthisdocumentbeappliedwithoutconsiderationofaproject''smany......
【中国标准分类号】:D14
【国际标准分类号】:
【页数】:19P.;A4
【正文语种】:
