MIL-HDBK-103AD

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MIL-HDBK-103AD, DEPARTMENT OF DEFENSE HANDBOOK: LIST OF STANDARD MICROCIRCUIT DRAWINGS (26 MAR 2009)., The Standard Microcircuit Drawing Program (SMDP) is directly under the auspices of the DoD Parts Management Program (PMP). The PMP is implemented by MIL-HDBK-512, "Parts Management." The PMP will be the avenue for screening candidate parts for the SMDP by the DSCC Military Parts Control Advisory Group (MPCAG).
 

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【英文标准名称】:SystemInformationforSatelliteDistributionofDigitalTelevisionforCableandMMDS
【原文标准名称】:电缆和MMDS用数字电视的卫星分布系统信息
【标准号】:ANSI/SCTE57-2003
【标准状态】:作废
【国别】:美国
【发布日期】:2004-01-27
【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】:SCTE
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Cablecommunication;Cables;Communicationtechnology;Digitaltelevision;Distribution;Information;Satellites;Transmissiontechnique
【摘要】:ThisdocumentdefinesaStandardforSystemInformation(SI)compatiblewithMPEG-2compliantdigitalmultiplexbitstreamsconstructedinaccordancewithISO/IEC13818-1(MPEG-2)andtransmittedoversatellitefordistributiononcableandMMDS.ThedocumentdefinesthestandardprotocolthatcarriesrelevantSystemInformation(SI)tablescontainedwithinpacketscarriedinthetransportmultiplex.ThetermSIwillbeusedtorefertosystem-wideinformationintheNetworkPacketIdentifier(PID).
【中国标准分类号】:M35
【国际标准分类号】:33_170;33_180_10
【页数】:
【正文语种】:英语


【英文标准名称】:Acoustics-Determinationofsoundpowerradiatedintoaductbyfansandotherair-movingdevices-In-ductmethod
【原文标准名称】:声学.风机或其他空气移动装置辐射入管道中的声功率的测定.管道法
【标准号】:BSENISO5136-2009
【标准状态】:现行
【国别】:英国
【发布日期】:2010-04-30
【实施或试行日期】:2010-04-30
【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】:
【英文主题词】:Acousticmeasurement;Acoustictesting;Acoustics;Definitions;Determination;Ductmethods;Ductedfans;Fans;Loudnesslevels;Measurement;Measuringresults;Measuringtechniques;Noise(environmental);Noisemeasurements;Powerlevels;Sound;Soundintensity;Soundlevel;Soundlevels;Soundpower;Testing;Ventilators;Volume(sound)
【摘要】:ThisInternationalStandardspecifiesamethodfortestingductedfansandotherair-movingdevicestodeterminethesoundpowerradiatedintoananechoicallyterminatedductontheinletand/oroutletsideoftheequipment.Themethodisapplicabletofanswhichemitsteady,broad-band,narrow-bandanddiscrete-frequencysoundandtoairtemperaturesbetween?50°Cand+70°C.Thetestductdiameterrangeisfrom0,15mto2m.Testmethodsforsmall(d<0,15m)andlarge(d>2m)testductsaredescribedintheinformativeAnnexesHandI,respectively.Themaximummeanflowvelocityatthemicrophoneheadforwhichthemethodissuitabledependsonthetypeofmicrophoneshieldused,andisasfollows:?foamball15m/s;?nosecone20m/s;?samplingtube40m/s.Abovethesevaluesthesuppressionofturbulentpressurefluctuationsbythemicrophoneshield(see3.9)maybeinsufficient.ItisexpectedthatsoundpowertestswillbeconductedinconjunctionwithairflowperformancetestsinaccordancewithISO5801.Theductingarrangementwillthereforenormallyincorporatea“star”typeflowstraightenerontheoutletsideofthefanwhichwillminimizeswirl(see7.3).Whereitispermissibletodeletethestraighteneras,forexample,withlargefanstoinstallationcategoryCaccordingtoISO5801:1997,themethodislimitedtoaswirlangleof15°.(AnexampleofamethodfordeterminingtheangleofswirlisgiveninAnnexJ.)
【中国标准分类号】:Z32
【国际标准分类号】:17_140_20;23_120
【页数】:80P.;A4
【正文语种】:英语