ANSI/ADA 21-1981 牙科用硅磷酸锌粘合剂

上一篇: ANSI B157.1-1981 刻度盘,称重装置和称重系统的安全要求
下一篇: ANSI/API MPMS12.2-1981 测量标准.涡轮机或代替的仪表对液体石油数量的计算

【英文标准名称】:Acoustics-In-situdeterminationofinsertionlossofoutdoornoisebarriersofalltypes
【原文标准名称】:声学各种类型户外声屏障插入损失的现场测定
【标准号】:ISO10847-1997
【标准状态】:现行
【国别】:国际
【发布日期】:1997-08
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC43
【标准类型】:()
【标准水平】:()
【中文主题词】:测定;定义;介入损耗;性能试验;现场试验;声学;噪声降低;空气噪声;防护屏蔽;就地
【英文主题词】:Acoustics;Airbornenoise;Definitions;Determination;Fieldtesting;Insitu;Insertionloss;Noisereduction;Performancetests;Shields
【摘要】:ThisInternationalStandardspecifiesmethodsforthedeterminationofinsertionlossofoutdoornoisebarriersintendedtoshieldvariouskindsofnoisesources.Itspecifiesdetailedproceduresforin-situmeasurementofbarrierinsertionlossincludingmicrophonepositions,sourceconditionsandacousticenvironmentsofthemeasurementsites.ThisInternationalStandardallowsonetomeasuretheinsertionlossofagivennoisebarrierinagivensiteandincludinggivenmeteorologicalconditions.Itdoesnotmakeitpossibletocompareinsertionlossvaluesofanequivalentbarrieronadifferentsite.Itcanbeusedforcomparinginsertionlossvaluesofdifferenttypesofbarriersonasamesiteandundergivenmeteorologicalconditionsbythedirectmethod.ThisInternationalStandardgivesamethodfordetermininginsertionloss:a)fromtheleveldifferencebeforeandaftertheinstallationofnoisebarriersandwhenthisisnotpossiblebecauseabarrierhasalreadybeeninstalled,b)usinganindirectmethodtoestimatethesoundpressurelevelsbeforeinstallationofthebarrierbymeasurementatanothersitewhichhasbeenjudgedtobeequivalent.Forequivalentsites,closematchisrequiredinsourcecharacteristics,microphonelocationsterrainprofilesgroundsurfacecharacteristics,surroundingartificialstructuresandmeteorologicalconditions.ThisInternationalStandardprescribesprinciplesforensuringthatsufficientlyequivalentconditionsaremaintainedbetween"before"and"after"casestopermitcertain,reliableandrepeatabledeterminationofbarrierinsertionloss.ThisInternationalStandarddoesnotcoverthedeterminationoftheintrinsicacousticquantitiesofthebarrier,forexamplethesoundreductionindexandthesoundabsorptioncoefficient.TheequivalentcontinuousA-weightedsoundpressurelevel,theA-weightedsoundexposurelevel,theoctaveorone-third-octavebandsoundpressureleveland/ormaximumsoundpressurelevelareusedasnoisedescriptors.ThisInternationalStandardcanbeusedforroutinedeterminationofbarrierperformanceorforengineeringordiagnosticevaluation.Itcanbeusedinsituationswherethebarrieristobeinstalledorhasalreadybeeninstalled.
【中国标准分类号】:Z32
【国际标准分类号】:17_140_01
【页数】:18P.;A4
【正文语种】:英语


【英文标准名称】:PerformanceRatingofVariableRefrigerantFlow(VRF)Multi-SplitAir-ConditioningandHeatPumpEquipment
【原文标准名称】:多分割区空气调节和热泵设备可变制冷剂流量(VRF)作业等级
【标准号】:ANSI/AHRI1230-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:空调器;空调;容量;条件;冷却;流动;热泵;加热;室内;匹配的;室外机;性能;考核;制冷剂;制冷;裂缝;技术
【英文主题词】:Airconditioners;Airconditioning;Capacity;Condition;Cooling;Flow;Heatpumps;Heating;Indoors;Matched;Outdoorunits;Performance;Rating;Refrigerants;Refrigeration;Split;Technology
【摘要】:ThisstandardcoversmatchedvariablerefrigerantflowMulti-SplitAirConditionersandMulti-SplitHeatPumpsusingdistributedrefrigeranttechnologywithcoolingandheatingcapacitiesforoutdoorunitsfrom12,000Btu/h[3508W]to300,000Btu/h[90,000W]andindoorunitsfrom5,000Btu/h[1,000W]to60,000Btu/h[20,000W].Eachindoorunitisdesignedtoconditionasinglezone.
【中国标准分类号】:P45;J75
【国际标准分类号】:27_080;27_200
【页数】:
【正文语种】:英语