DIN 4740-2-1987 通风设备.无增塑的聚氯乙烯垂直管道.弯管配件.最小壁厚
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【英文标准名称】:Ventilationplant;unplasticizedpolyvinylchloride(PVC-U)uptakes;pipefittings,bends;minimumwallthickness
【原文标准名称】:通风设备.无增塑的聚氯乙烯垂直管道.弯管配件.最小壁厚
【标准号】:DIN4740-2-1987
【标准状态】:现行
【国别】:德国
【发布日期】:1987-08
【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】:弯管联接器;管道配件;管;管道;通风设备;空调设备;配件;未增塑聚氯乙烯;尺寸;通风管道;塑料;通风道工程;弯管;聚氯乙烯;热环境系统;空调系统;通风;塑料管道
【英文主题词】:Air-conditioningequipment;Air-conditioningsystems;Bendcouplings;Dimensions;Fittings;Pipefittings;Pipelines;Pipes;Plasticpipelines;Plastics;Polyvinylchloride;Thermalenvironmentsystems;Unplasticizedpolyvinylchloride;Ventilation;Ventilationducts;Ventilationductwork;Ventilationequipment
【摘要】:ThisstandardcontainstheminimumwallthicknessofPVC-Uunstiffenedbendsforpipes.Accordingtothesafetyrequirementsoftheplantsandthedimensionsexistingonthemarket,theconstructingengineercanchoosethewallthicknessonrequired.#,,#
【中国标准分类号】:Q76;G33
【国际标准分类号】:91_140_30
【页数】:4P;A4
【正文语种】:德语
【英文标准名称】:RadiationProtectionInstrumentationTestandCalibration,PortableSurveyInstruments
【原文标准名称】:辐射防护仪器的试验和校准,便携式调查仪器
【标准号】:IEEEN323A-1997
【标准状态】:现行
【国别】:美国
【发布日期】:1997-01-01
【实施或试行日期】:
【发布单位】:美国电气电子工程师学会(US-IEEE)
【起草单位】:IEEE
【标准类型】:()
【标准水平】:()
【中文主题词】:α辐射线;β辐射;校准;定义(术语);剂量计;致电离辐射;测量仪器;中子射线;核技术;光子束;便携的;辐射测量;辐射防护;试验
【英文主题词】:Alpharadiation;Betaradiation;Calibration;Definitions;Dosimeters;Ionizingradiation;Measuringinstruments;Neutronradiation;Nucleartechnology;Photonbeams;Portable;Radiationmeasurement;Radiationprotection;Testing
【摘要】:Thisstandardestablishesspecificrequirementsforportableradiationprotectioninstrumentsusedfordetectionandmeasurementoflevelsofionizingradiationfieldsorlevelsofradioactivesurfacecontamination.Forpurposesofthisstandard,portableradiationprotectioninstrumentsarethosebattery-poweredinstrumentsthatarecarriedtoaspecificfacilityorlocationforuse.NOTE--Theseinstrumentsarenormallyheldduringoperation.Countratemetersandsealers,whenusedwithanappropriateprobeforquantifyingactivity,canbeconsideredportableradiationprotectioninstrumentsandtreatedasasingleunitforthepurposesofthisstandard.Specificrequirementsforcalibrationoflow-range[i.e.,nearbackgroundto10μSv/h(1mrem/h)]1portablesurveyinstrumentswillbedetailedinANSIN323B(currentlyunderdevelopment).SpecificrequirementsforallairmonitoringinstrumentswillbedetailedinANSIN323C(currentlyunderdevelopment).Specificrequirementsforinstalledinstrumentsthatmeasuredoseordoseequivalent,ordoserateordoseequivalentrate,andACpoweredinstrumentsusedonlytodetectthepresenceofradioactivematerialcontaminationwillbedetailedinANSIN323D(currentlyunderdevelopment).Radiationprotectioninstrumentationprovidesdirectreadoutof,orreadoutproportionalto,doseordoseequivalent,doserateordoseequivalentrate,oractivityperunitarea(i.e.,effectiveprobearea).Includedareportablerateandintegratingdevicesforbeta,photon,andneutronradiations;andmonitorsforsurfacecontamination(alpha,beta,andphoton).Portableradiationprotectioninstrumentsintendedforuseinunderwatersurveyandmonitoringareincludedinthisstandard.Personneldosimeters(includingelectronicpocketdosimetersandhybridpocketdosimeters/doseequivalentratemeters)andenvironmentalmonitoringinstruments,otherthanportableinstrumentsusedtomeasurerad/horrem/hlevels,areoutsidethescopeofthisstandard.Radonmonitoringinstrumentsarenotwithinthescopeofthisstandard.Sincespecial-purposeinstrumentation,suchasemergencypost-accidentradiologicalmonitors,mayalsofallunderthescopeofoneormorerelatedANSIstandards,thisstandardisintendedtosupplementratherthanreplacethesestandards.Forexample,ANSIN42.17A-1989[133]setsforthrequirementsforinstrumentperformance.Ingeneral,radiationprotectioninstrumentationisconsideredtocoverthedoseanddoseequivalentraterangesforsurveymetersof10μGy/hto10Gy/h(1mrad/hto1000red/h)and10μSv/hto10Sv/h(1mrem/hto1000rein/h),andactivity-per-unit-arearangesforsurfacecontaminationmonitorsof2Bq/100cm2to20000Bn/100cm2(120dpm/100cm2to1.2x106dpm/100cm2).Throughoutthisstandard,threeverbshavebeenusedtoindicatetiledegreeofrigorintendedforeachspecificcriterion.Thewordshallisusedtodenotearequirement.Thewordshouldisusedtodenotearecommendation.Thewordmayisusedtodenoteapermissiblepractice.
【中国标准分类号】:
【国际标准分类号】:17_240
【页数】:24P.;A4
【正文语种】:英语
【英文标准名称】:IEEEStandardforSystemandSoftwareVerificationandValidation
【原文标准名称】:软件和系统的鉴定和认证IEEE标准
【标准号】:IEEE1012-2012
【标准状态】:现行
【国别】:美国
【发布日期】:2012
【实施或试行日期】:
【发布单位】:美国电气电子工程师学会(US-IEEE)
【起草单位】:IEEE
【标准类型】:()
【标准水平】:()
【中文主题词】:计算机软件;定义;信息处理;信息技术;寿命周期;寿命;工作特性;质量;质量保证;软件;系统工程;试验;有校性
【英文主题词】:Computersoftware;Definitions;Informationprocessing;Informationtechnology;Lifecycles;Life(durability);Performancecharacteristics;Quality;Qualityassurance;Software;Systemengineering;Testing;Validation
【摘要】:
【中国标准分类号】:L77
【国际标准分类号】:35_080
【页数】:223P;A4
【正文语种】:英语