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HG/T 21624-2005 L47型风机逆流式冷却塔通用图

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基本信息
标准名称:L47型风机逆流式冷却塔通用图
中标分类: 化工 >> 化工机械与设备 >> 化工设备
ICS分类: 化工技术 >> 化工设备
替代情况:HG/T 21624-1990
发布部门:中国石油和化工勘察设计协会
发布日期:2005-07-10
实施日期:2006-01-01
首发日期:1900-01-01
作废日期:1900-01-01
归口单位:中国石油和化工勘察设计协会
起草单位:天津市化工设计院
出版日期:1900-01-01
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所属分类: 化工 化工机械与设备 化工设备 化工技术 化工设备
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【英文标准名称】:Europeandigitalcellulartelecommunicationssystem(Phase2)-RadioLinkProtocol(RLP)fordataandtelematicservicesontheMobileStation-BaseStationSystem(MS-BSS)interfaceandtheBaseStationSystem-Mobile-servicesSwitchingCentre(BSS-MS
【原文标准名称】:欧洲单元数字远程通信系统(2).接口式移动站-基础站系统(MS-BSS)和接口式基础站系统-移动无线电中继(BSS-MSC)的数据和远程电讯服务用无线电连接协议(RLP)
【标准号】:DINETS300563/A1-1996
【标准状态】:作废
【国别】:德国
【发布日期】:1996-02
【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】:无线电电路;通信网;开关设备;数字的;移动无线电通信系统;无线电话通讯;基础站;电信;信息技术;无线通信业务;地面流动服务设施;公共的;欧洲的;终端装置;通信系统;协议;数据通信;电信设备;传输协议
【英文主题词】:
【摘要】:
【中国标准分类号】:M11
【国际标准分类号】:33_060_50
【页数】:11P;A4
【正文语种】:德语


【英文标准名称】:StandardPracticeforNaI(Tl)Gamma-RaySpectrometryofWater
【原文标准名称】:用NaI(TI)γ射线光谱法处理水的标准规程
【标准号】:ASTMD4962-2002
【标准状态】:现行
【国别】:
【发布日期】:2002
【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】:D19.04
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:γ辐射;放射性同位素;水质分析
【英文主题词】:gammapulseheightanalysis;gammarayspectrometry;multichannelanalyzer;sodiumiodidedetector
【摘要】:Gamma-rayspectrometryisusedtoidentifyradionuclidesandtomakequantitativemeasurements.Useofacomputerandalibraryofstandardspectrawillberequiredforquantitativeanalysisofcomplexmixturesofnuclides.Variationofthephysicalgeometryofthesampleanditsrelationshipwiththedetectorwillproducebothqualitativeandquantitativevariationsinthegamma-rayspectrum.Toadequatelyaccountforthesegeometryeffects,calibrationsaredesignedtoduplicateallconditionsincludingsource-to-detectordistance,sampleshapeandsize,andsamplematrixencounteredwhensamplesaremeasured.Thismeansthatacompletesetoflibrarystandardsmayberequiredforeachgeometryandsampletodetectordistancecombinationthatwillbeused.Sincesomespectrometrysystemsarecalibratedatmanydiscretedistancesfromthedetector,awiderangeofactivitylevelscanbemeasuredonthesamedetector.Forhigh-levelsamples,extremelylowefficiencygeometriesmaybeused.Quantitativemeasurementscanbemadeaccuratelyandpreciselywhenhighactivitylevelsamplesareplacedatdistancesof1mormorefromthedetector.Electronicproblems,suchaserroneousdeadtimecorrection,lossofresolution,andrandomsumming,maybeavoidedbykeepingthegrosscountratebelow2000countspersecondandalsokeepingthedeadtimeoftheanalyzerbelow5%.Totalcountingtimeisgovernedbytheactivityofthesample,thedetectorsourcedistance,andtheacceptablePoissoncountinguncertainty.1.1Thispracticecoversthemeasurementofradionuclidesinwaterbymeansofgamma-rayspectrometry.Itisapplicabletonuclidesemittinggamma-rayswithenergiesgreaterthan50keV.Fortypicalcountingsystemsandsampletypes,activitylevelsofabout40Bq(1080pCi)areeasilymeasuredandsensitivitiesofabout0.4Bq(11pCi)arefoundformanynuclides(1-10).Countratesinexcessof2000countspersecondshouldbeavoidedbecauseofelectroniclimitations.Highcountratesamplescanbeaccommodatedbydilutionorbyincreasingthesampletodetectordistance.1.2Thispracticecanbeusedforeitherquantitativeorrelativedeterminations.Intracerwork,theresultsmaybeexpressedbycomparisonwithaninitialconcentrationofagivennuclidewhichistakenas100%.Forradioassay,theresultsmaybeexpressedintermsofknownnuclidicstandardsfortheradionuclidesknowntobepresent.Inadditiontothequantitativemeasurementofgamma-rayactivity,gamma-rayspectrometrycanbeusedfortheidentificationofspecificgamma-rayemittersinamixtureofradionuclides.Generalinformationonradioactivityandthemeasurementofradiationhasbeenpublished(11and12).Informationonspecificapplicationofgamma-rayspectrometryisalsoavailableintheliterature(13-16).1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Z16
【国际标准分类号】:13_060_30
【页数】:8P.;A4
【正文语种】: