NF S30-007-8-2004 声学.校正听力设备的基准零级.第8部分:纯音和环绕耳机的基准等效阈声压级
时间:2024-05-05 05:32:43 来源: 标准资料网 作者：标准资料网 阅读：9038
【英文标准名称】:Acoustics-referencezeroforthecalibrationofaudiometricequipment-Part8:referenceequivalentthresholdsoundpressurelevelsforpuretonesandcircumauralearphones.
【原文标准名称】:声学.校正听力设备的基准零级.第8部分:纯音和环绕耳机的基准等效阈声压级
【标准号】:NFS30-007-8-2004
【标准状态】:现行
【国别】:法国
【发布日期】:2004-10-01
【实施或试行日期】:2004-10-20
【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】:
【英文主题词】:
【摘要】:
【中国标准分类号】:A59
【国际标准分类号】:13_140
【页数】:15P;A4
【正文语种】:其他
【英文标准名称】:StandardTestMethodforHydraulicConductivityofEssentiallySaturatedPeat
【原文标准名称】:基本饱和泥炭水渗导性的标准试验方法
【标准号】:ASTMD4511-2000(2006)
【标准状态】:现行
【国别】:
【发布日期】:2000
【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】:D18.04
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:施工材料;试验;泥炭
【英文主题词】:constant-headpermeability;hydraulicconductivity;peat;permeability;rigid-wallpermeameter;saturatedpeat
【摘要】:Valuesofhydraulicconductivitydeterminedbythistestmethodmaybeusefulinmakingroughpreliminaryestimatesoftheinitialratesofdrainageandcompressionofpeatdepositswhentheonlyeffectivestressincreaseonthedepositisthatresultingfromamoderate,gradualloweringofthewatertable.Evenunderlight,sustainedloads,peatwillundergodramaticvolumechangesthatinfluence(decrease)thehydraulicconductivityofthedepositbyseveralordersofmagnitude.Thistestmethoddoesnotofferprovisionsforthedeterminationoftherelationshipbetweenhydraulicconductivityandthevoidratioscorrespondingtoincreasingstresslevels.Therefore,thistestmethodisnotsuitableforapplicationsinvolvinggradeincreases,suchasembankmentconstructionorplacementofaccessbermsalongsidedrainageditches.Undisturbedspecimensfromapparentlyhomogeneouspeatdepositsatthesamelocationoftenexhibitsignificantlydifferenthydraulicconductivitypropertiesduetovariationsinmaterialcompositionandsamplingprocedure.Note18212;Thequalityoftheresultproducedbythisstandardisdependentonthecompetenceofthepersonnelperformingit,andthesuitabilityoftheequipmentandfacilitiesused.AgenciesthatmeetthecriteriaofPracticeD3740aregenerallyconsideredcapableofcompetentandobjectivetesting/sampling/inspection/etc.UsersofthisstandardarecautionedthatcompliancewithPracticeD3740doesnotinitselfensurereliableresults.Reliableresultsdependonmanyfactors;PracticeD3740providesameansofevaluatingsomeofthosefactors.1.1Thistestmethodcoversthedeterminationofthehydraulicconductivity(permeability)ofessentiallysaturated,intactcylindricalspecimensofpeatwhenthehydraulicconductivityisgreaterthan110-7m/s(110-5cm/s).Duringthetest,thespecimensarecontainedinthecoreholder,orinright,regularcylindricalsectionscutfromthesamplingtubeinwhichtheywereoriginallyobtainedinthefield.1.2Hydraulicconductivityiscalculatedonthebasisofthemeasuredconstantflowratethroughthespecimenunderconstanthead.Forverification,flowratedeterminationsmaybemadeattwoormorevaluesofconstantheadwithcorrespondingcalculationsofhydraulicconductivity.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.4AllobservedandcalculatedvaluesshallconformtotheguideforsignificantdigitsandroundingestablishedinPracticeD6026.1.4.1Theproceduresusedtospecifyhowdataarecollected/recordedandcalculatedinthisstandardareregardedastheindustrystandard.Inaddition,theyarerepresentativeofthesignificantdigitsthatshouldgenerallyberetained.Theproceduresuseddonotconsidermaterialvariation,purposeforobtainingthedata,specialpurposestudies,oranyconsiderationsfortheuser''sobjectives,anditiscommonpracticetoincreaseorreducesignificantdigitsofreporteddatatobecommensuratewiththeseconsiderations.Itisbeyondthescopeofthisstandardtoconsidersignificantdigitsusedinanalysismethodsforengineeringdesign.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:D20
【国际标准分类号】:65_080
【页数】:5P.;A4
【正文语种】:
【英文标准名称】:Antimony
【原文标准名称】:锑
【标准号】:JISK8080-1994
【标准状态】:现行
【国别】:日本
【发布日期】:1994-07-01
【实施或试行日期】:
【发布单位】:日本工业标准调查会(JP-JISC)
【起草单位】:TechnicalCommitteeonChemicalAnalysis
【标准类型】:()
【标准水平】:()
【中文主题词】:化学试剂;锑;准金属
【英文主题词】:
【摘要】:この規格は,試薬として用いるアンチモンについて規定する。
【中国标准分类号】:G62
【国际标准分类号】:71_040_30
【页数】:6P;A4
【正文语种】:日语