BS ISO 4360-2008 液体比重测定法.使用三角形剖面堰的明渠流量的测量
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【英文标准名称】:Hydrometry-Openchannelflowmeasurementusingtriangularprofileweirs
【原文标准名称】:液体比重测定法.使用三角形剖面堰的明渠流量的测量
【标准号】:BSISO4360-2008
【标准状态】:现行
【国别】:英国
【发布日期】:2008-03-31
【实施或试行日期】:2008-03-31
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:明渠流量;误差分析;流量计量;流量测量;流量计;斜槽;液体流量;明渠;水;溢流堰;堰(测量)
【英文主题词】:Channelflow;Erroranalysis;Flowmeasurement;Flowmeasurements;Flowmeters;Flumes;Liquidflow;Openchannels;Water;Weirs;Weirs(measurement)
【摘要】:ISO4360:2008specifiesmethodsforthemeasurementoftheflowofwaterinopenchannelsundersteadyflowconditionsusingtriangularprofileweirs.Theflowconditionsconsideredaresteadyflowswhichareuniquelydependentontheupstreamheadanddrownedflowswhichdependondownstreamaswellasupstreamlevels.
【中国标准分类号】:A53
【国际标准分类号】:17_120_20
【页数】:36P;A4
【正文语种】:英语
【英文标准名称】:StandardConsumerSafetySpecificationforHighChairs
【原文标准名称】:高脚椅的安全使用规范
【标准号】:ASTMF404-1999
【标准状态】:作废
【国别】:美国
【发布日期】:1999
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:消费者;最终制品;安全;安全要求;椅子
【英文主题词】:safetyrequirements;safety;enduseproducts;consumers;chairs
【摘要】:
【中国标准分类号】:Y80
【国际标准分类号】:97_140
【页数】:
【正文语种】:英语
【英文标准名称】:StandardTestMethodforAirflowResistanceofAcousticalMaterials
【原文标准名称】:吸音材料的气流阻力器的试验方法
【标准号】:ASTMC522-2003(2009)e1
【标准状态】:现行
【国别】:美国
【发布日期】:2003
【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】:E33.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:absorption;acousticalmaterials;airflowresistance;airflowresistivity;Absorption;Acousticaltests;Airflowperformance;Airflowresistance;Airflowresistivity;Soundtransmission--buildingmaterials/applications
【摘要】:Thespecificairflowresistanceofanacousticalmaterialisoneofthepropertiesthatdetermineitssound-absorptiveandsound-transmittingproperties.Measurementofspecificairflowresistanceisusefulduringproductdevelopment,forqualitycontrolduringmanufacture,andforspecificationpurposes.Validmeasurementsaremadeonlyintheregionoflaminarairflowwhere,asidefromrandommeasurementerrors,theairflowresistance(R=P/U)isconstant.Whentheairflowisturbulent,theapparentairflowresistanceincreaseswithanincreaseofvolumevelocityandthetermx201C;airflowresistancex201D;doesnotapply.ThespecificairflowresistancemeasuredbythistestmethodmaydifferfromthespecificresistancemeasuredbytheimpedancetubemethodinTestMethodE384fortworeasons.Inthepresenceofsound,theparticlevelocityinsideaporousmaterialisalternatingwhileinthistestmethod,thevelocityisconstantandinonedirectiononly.Also,theparticlevelocityinsideaporousmaterialisnotthesameasthelinearvelocitymeasuredoutsidethespecimen.1.1Thistestmethodcoversthemeasurementofairflowresistanceandtherelatedmeasurementsofspecificairflowresistanceandairflowresistivityofporousmaterialsthatcanbeusedfortheabsorptionandattenuationofsound.Materialscoverarangefromthickboardsorblanketstothinmats,fabrics,papers,andscreens.Whenthematerialisanisotropic,provisionismadeformeasurementsalongdifferentaxesofthespecimen.1.2Thistestmethodisdesignedforthemeasurementofvaluesofspecificairflowresistancerangingfrom100to10000mksrayls(Pax00B7;s/m)withlinearairflowvelocitiesrangingfrom0.5to50mm/sandpressuredifferencesacrossthespecimenrangingfrom0.1to250Pa.Theupperlimitofthisrangeoflinearairflowvelocitiesisapointatwhichtheairflowthroughmostporousmaterialsisinpartialorcompletetransitionfromlaminartoturbulentflow.1.3AprocedureforaccreditingalaboratoryforthepurposesofthistestmethodisgiveninAnnexA1.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4.1Table1isprovidedforusertoconvertintocgsunits.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q25
【国际标准分类号】:91_120_20
【页数】:5P.;A4
【正文语种】:英语
