【英文标准名称】:Testingoflubricants-Determinationofthecontentofadditiveelements-Part3:Directdeterminationbyopticalemissionspectralanalysiswithinductivelycoupledplasma(ICP/OES)
【原文标准名称】:润滑剂检验.添加剂含量的测定.第3部分:用感应耦合等离子体通过光学发射频谱分析作直接测定
【标准号】:DIN51391-3-1994
【标准状态】:作废
【国别】:德国
【发布日期】:1994-10
【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】:矿物油;光学试验;石油产品;含量测定;锌;检验;质量浓度;试验;发射频谱分析;钙;仪器;药液;润滑剂;镁;化学分析和试验;钡;等离子体;润滑油;添加剂;光谱分析;试验装置;光学的
【英文主题词】:
【摘要】:
【中国标准分类号】:E30
【国际标准分类号】:75_100
【页数】:3P;A4
【正文语种】:德语


【英文标准名称】:Acoustics-Measurementoftheinsitusoundattenuationofaremovablescreen
【原文标准名称】:声学.可移动声屏障声衰减的现场测量
【标准号】:BSENISO11821-1997
【标准状态】:现行
【国别】:英国
【发布日期】:1997-10-15
【实施或试行日期】:1997-10-15
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:性能试验;可拆卸的;误差修正;现场试验;噪声控制;衰减;吸收(波);声学测量;噪声控制装置;遮板(隔墙);声学试验;隔音;声试验
【英文主题词】:
【摘要】:ThisInternationalStandardspecifiesmethodsforevaluatingtheinsitusoundattenuationperformanceofaremovablescreen,eitherindoorsoroutdoors.Thisengineeringgrademethodisbasedonaninsertionlossmeasurementthatcanbecarriedouteitherwithshieldingoftheactualsoundsource(s)orusinganartificialsoundsource.Thesoundattenuationperformanceachievedbysuchascreen,asevaluatedbythepresentInternationalStandard,dependson:—diffractionaroundtheedgesofthescreen;—transmissionthroughthecomponentsofthescreen;—absorptionofthepanelsofthescreen,aswellasinitssurroundings;—theroominwhichthescreenstandsifindoors.Whenaspecificworkstationistobeshielded,theinsitusoundattenuationvaluedescribestheeffectofthescreen.However,whenacompleteareaistobeshielded,theperformanceofthescreenwillvarydependingonthepositionsusedformeasurement.Therefore,itisrecommendedthatthemaximumandminimumvaluesofsoundattenuationaregiven.Thesoundattenuationperformanceisdeterminedintermsofinsertionloss.Whenassessingtheperformanceofascreenlocatedindoors,theroomgeometryandreflectionsfromwalls,ceilingsandroomfittingswillinfluencetheperformance.Asaconsequence,thecomparisonofscreenperformancecanonlybemadeifthetestconditionsareidentical.ThisInternationalStandardisapplicabletoscreenswithheightandlengthgreaterthan1,5m.However,itmayalsobeusedforsmallerscreensprovidedthattheinterestedpartiescometoanagreementonthis.Asenvironmentalconditionscanaffectthemeasurementsoutdoors,itisrecommendedthatmeasurementsshouldberestrictedtowithin25mofthescreen.However,measurementsmayalsocoveragreaterdistanceprovidedthattheinterestedpartiescometoanagreementonthis.Differencescanoccurbetweeninsitutestresults.Therefore,comparisonoftheperformanceofdifferentscreenscanbemadeonlyonthebasisofdatabasedonthesamemeasurementmethodperformedatthesamelocation.ThisInternationalStandardappliestoacompletescreenonlyandnottoindividualcomponentsfromwhichitismade.Soundinsulationandsoundabsorptionforscreencomponents(suchaspanelelements,doors,windows)shouldbemeasuredaccordingtootherrelevantstandards.ThisInternationalStandardisnotapplicabletoopenplanofficesscreensnortooutdoorbarriersdealingwithcommunitynoise.Itisalsonotintendedforqualificationpurposes.
【中国标准分类号】:A42
【国际标准分类号】:17_140_99
【页数】:20P;A4
【正文语种】:英语