IEC 61158-2 AMD 1-1995 工业控制系统用字段总线标准.弟2部分:物理层规范和服务定义.补充件1
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【英文标准名称】:Fieldbusstandardforuseinindustrialcontrolsystems-Part2:Physicallayerspecificationandservicedefinition;Amendment1
【原文标准名称】:工业控制系统用字段总线标准.弟2部分:物理层规范和服务定义.补充件1
【标准号】:IEC61158-2AMD1-1995
【标准状态】:作废
【国别】:国际
【发布日期】:1995-11
【实施或试行日期】:
【发布单位】:国际电工委员会(IEC)
【起草单位】:IEC/SC65C
【标准类型】:()
【标准水平】:()
【中文主题词】:物理层;数据传送;控制系统;过程控制;字段总线;电气工程
【英文主题词】:datatransfer;electricalengineering;controlsystems;physicallayers;processcontrol;fieldbus
【摘要】:
【中国标准分类号】:L79
【国际标准分类号】:35_100_10;35_160
【页数】:79P;A4
【正文语种】:英语
【英文标准名称】:Inserviceinspectionsforprimarycircuitcomponentsoflightwaterreactors;visualinspection
【原文标准名称】:轻水反应堆初级回路元件的定期检验.目视检验
【标准号】:DIN25435T.4-1987
【标准状态】:作废
【国别】:
【发布日期】:
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【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】:
【国际标准分类号】:
【页数】:
【正文语种】:
【英文标准名称】:StandardTestMethodforMeasurementofAirborneSoundAttenuationbetweenRoomsinBuildings
【原文标准名称】:建筑物内部空间中空气声隔声测量的标准试验方法
【标准号】:ASTME336-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:E33.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:airbornesoundtransmissionloss;apparentsoundtransmissionclass;apparenttransmissionloss;fieldsoundtransmissionclass;fieldtransmissionloss;flankingtransmission;noiseisolationclass;noisereduction;normalizednoiseisolationclass;
【摘要】:Themainpartofthisstandardusesproceduresoriginallydevelopedforlaboratorymeasurementsofthetransmissionlossofpartitions.Theseproceduresassumethattheroomsinwhichthemeasurementsaremadehaveasoundfieldthatreasonablyapproximatesadiffusefield.Soundpressurelevelsinsuchroomsarereasonablyuniformthroughouttheroomandaveragelevelsvaryinverselywiththelogarithmoftheroomsoundabsorption.Notallroomswillsatisfytheseconditions.Practicalexperienceandcontrolledstudies(1)haveshownthatthetestmethodisapplicabletosmallerspacesnormallyusedforworkorliving,suchasroomsinmulti-familydwellings,hotelguestrooms,meetingrooms,andofficeswithvolumeslessthan150cubicmeters.ThemeasuresappropriateforsuchspacesareNR,NNR,andATL.ThecorrespondingsinglenumberratingsareNIC,NNICandASTC.TheATLandASTCmaybemeasuredbetweenlargerspacesthatmeetalimitationonabsorptioninthespacestoprovideuniformsounddistribution.AnnexA2wasdevelopedforuseinspacesthatareverylarge(volumeof150m3orgreater).Soundpressurelevelsduringtestingcanvarymarkedlyacrosslargeroomssothatthedegreeofisolationcanvarystronglywithdistancefromthecommon(separating)partition.Thisprocedureevaluatestheisolationobservednearthepartition.TheappropriatemeasureisNR,andtheappropriatesinglenumberratingisNIC.Itissometimesnecessarytodemonstratethatthesoundinsulationofapartitionmeetsorexceedsaspecificcriterion.AnnexA1providesadditionalrequirements,anddescribeshowshieldingprocedurescanbeusedtoreduceflankingtransmissioninstagestoshowthatapartitionhasachievedaminimumvalueoftheFTLorminimumvalueoftheFSTCwhichmaymeetorexceedthecriterion.Ifitisdemonstratedthatnosignificantflankingexiststhroughshieldingofallpotentialflankingpaths,then,andonlythen,FTLandFSTCmaybereportedwithoutqualification.Note38212;Measuringthesoundtransmissionlosspropertiesofapartitionitselftodemonstratethatitmeetsorexceedsaspecificcriterionisverydifficultinthefieldduetothepresenceofflanking(2,3).Roomvolumeandabsorptionrequirementsmustalsobemet.Severalmetricsareavailableforspecificuses:NoiseReduction(NR)andNoiseIsolationClass(NIC)8212;Describethesoundisolationbetweentwospacesintheconditionfound.Themeasurementmethodvariesdependingonthesizeofthespaces.Wheneachspaceislessthan150cubicmeters,soundlevelsareaveragedoverthespace.NRvaluesforsuchspaceswhenunfurnishedwillusuallybelowerthanvaluesmeasuredwhenthespacesarefurnished.Thesevaluesrelatedirectlytothesoundattenuationexperiencedbyoccupantsofthespacesfortheconditionevaluated,includingtheeffectsofflankingandroomabsorption,andnotjusttotheperformanceofapartition.Thereforeresultsmaybedifferentwhenmeasuredindifferentdirections.Wheneitherofthespacesis150cubicmetersormore,soundlevelsaremeasuredinanareaclosetothepartitiononeachside.Theseresultsincludesomeeffectofroomabsorptionandflanking,buttheeffectofroomabsorptionislesswhenmeasuredclosetothepartition.NormalizedNoiseReduction(NNR)andNormalizedNoiseIsolationClass(NNIC)8212;Givethesoundisolationbetweentworesidentialorofficespacesadjustedtostandardizedroomconditions.Thisnormalizationisusuallydonetocompensateforalackorexcessoffurnishingsintherooms.NNRandNNICshallnotbeusedforspacesof150cubicmetersorlarger.Thesevaluesareintendedtore.........
【中国标准分类号】:P31
【国际标准分类号】:91_120_20
【页数】:12P.;A4
【正文语种】:英语
