BS L 160-1976 铝-锌(5.6)-镁(2.5)-铜(1.6)-锆(0.22)合金棒材和挤压型材规范(溶液处理和人工时效至过老化条件)
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【英文标准名称】:Specification.Barsandextrudedsectionsofaluminium-zinc-magnesium-copper-chromiumalloy(solutiontreatedandartificiallyagedtoanoveragedcondition)(Zn5.6,Mg2.5,Cu1.6,Cr0.22)
【原文标准名称】:铝-锌(5.6)-镁(2.5)-铜(1.6)-锆(0.22)合金棒材和挤压型材规范(溶液处理和人工时效至过老化条件)
【标准号】:BSL160-1976
【标准状态】:现行
【国别】:英国
【发布日期】:1976-05-28
【实施或试行日期】:1976-05-28
【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】:含锌合金;厚度;含铬合金;腐蚀试验;航空运输工程;铝合金;含镁合金;金属型材;材料的机械性能;热处理;老化;固溶热处理;棒材;电导性;化学成分;应力腐蚀;含铜合金
【英文主题词】:stresscorrosion;ageing(materials);aluminiumalloys;chromium-containingalloys;magnesium-containingalloys;copper-containingalloys;electricalconductivity;metalsections;chemicalcomposition;corrosiontests;heattreatment;airtransportengineering;mechanicalpropertiesofmaterials;solutionheattreatment;thickness;zinc-containingalloys;bars(materials)
【摘要】:Barsandextrudedsectionsofaluminium-zinc-magnesium-copper-chromiumalloy1.Inspectionandtestingprocedure2.Qualityofmaterial3.Chemicalcomposition4.Condition5.Heattreatment6.Mechanicalproperties7.Resistancetostresscorrosioncracking
【中国标准分类号】:H61
【国际标准分类号】:49_025_20
【页数】:6P.;A4
【正文语种】:英语
Product Code:SAE AIR4548
Title:Real-Time Modeling Methods for Gas Turbine Engine Performance
Issuing Committee:S-15 Gas Turbine Perf Simulation Nomenclature And Interfaces
Scope: This SAE Aerospace Information Report (AI) provides a review of real-time modeling methodologies for gas turbine engine performance. The application of real-time models and modeling methodologies are discussed. The modeling methodologies addressed in this AIR concentrate on the aerothermal portion of the gas turbine propulsion system. Characteristics of the models, the various algorithms used in them, and system integration issues are also reviewed. In addition, example cases of digital models in source code are provided for several methodologies.【英文标准名称】:Informationtechnology-FibreDistributedDataInterface(FDDI)-Part8:MediaAccessControl-2(MAC-2)
【原文标准名称】:信息技术.光纤分布式数据接口(FDDI).第8部分:媒体访问控制-2(MAC-2)
【标准号】:ISO/IEC9314-8-1998
【标准状态】:现行
【国别】:国际
【发布日期】:1998-08
【实施或试行日期】:
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO/IECJTC1
【标准类型】:()
【标准水平】:()
【中文主题词】:光波导;界面;数据传输;光学纤维;信息技术;网络互连;定义;数据处理;通信规程;光纤分布数据接口(FIBERDISTRIBUTEDDATAINTERFACE);信息交换;数据接口;令牌环;控制规程;接口(数据处理);多路存取计算机
【英文主题词】:
【摘要】:ThispartofISO/IEC9314specifiestheMediaAccessControl(MAC),themiddlesublayeroftheDataLinkLayer(DLL),forFibreDistributedDataInterface(FDDI).FDDI(ISO/IEC9314)providesahigh-bandwidth(100Mbit/s),general-purposeinterconnectionamonginformationprocessingsystems,subsystemsandperipheralequipment,usingfibreopticsorothertransmissionmedia.FDDIcanbeconfiguredtosupportasustaineddatatransferrateofatleast80Mbit/s(10Mbyte/s).FDDIprovidesconnectivityformanynodesdistributedoverdistancesofmanykilometresinextent.CertaindefaultparametervaluesforFDDI(e.g.timersettings)arecalculatedonthebasisofupto1000transmissionlinksorupto200kmtotalfibrepathlength(typicallycorrespondingto500nodesand100kmofdualfibrecable,respectively);however,theFDDIprotocolscansupportmuchlargernetworksbyincreasingtheseparametervalues.Asshowninfigure1,ISO/IEC9314consistsofa)APhysicalLayer(PL),whichisdividedintotwosublayers:1)APhysicalMediumDependent(PMD),whichprovidesthedigitalbasebandpoint-to-pointcommunicationbetweennodesintheFDDInetwork.ThePMDprovidesallservicesnecessarytotransportasuitablycodeddigitalbitstreamfromnodetonode.ThePMDdefinesandcharacterizesthefibre-opticdriversandreceivers,medium-dependentcoderequirements,cables,connectors,powerbudgets,opticalbypassprovisions,andphysical-hardware-relatedcharacteristics.ItspecifiesthepointofinterconnectabilityforconformingFDDIattachments.TheinitialPMDstandard,ISO/IEC9314-3,definesattachmenttomulti-modefibre.AdditionalPMDsublayerstandardsarebeingdevelopedforattachmenttosingle-modefibreandSONET.2)APhysicalLayerProtocol(PHY),whichprovidesconnectionbetweenthePMDandtheDataLinkLayer.PHYestablishesclocksynchronizationwiththeupstreamcode-bitdatastreamanddecodesthisincomingcode-bitstreamintoanequivalentsymbolstreamforusebythehigherlayers.PHYprovidesencodinganddecodingbetweendataandcontrolindicatorsymbolsandcodebits,mediumconditioningandinitializing,thesynchronizationofincomingandoutgoingcode-bitclocks,andthedelineationofoctetboundariesasrequiredforthetransmissionofinformationtoorfromhigherlayers.InformationtobetransmittedonthemediumisencodedbythePHYusingagrouptransmissioncode.b)ADataLinkLayer(DLL),whichisdividedintotwoormoresublayers:1)AnoptionalHybridRingControl(HRC),whichprovidesmultiplexingofpacketandcircuitswitcheddataonthesharedFDDImedium.HRCcomprisestwointernalcomponents,aHybridMultiplexer(H-MUX)andanisochronousMAC(I-MAC).H-MUXmaintainsasynchronous125uscyclestructureandmultiplexesthepacketandcircuitswitcheddatastreams,andI-MACprovidesaccesstocircuitswitchedchannels.2)AMediaAccessControl(MAC),whichprovidesfairanddeterministicaccesstothemedium,addressrecognition,andgenerationandverificationofframechecksequences.Itsprimaryfunctionisthedeliveryofpacketdata,includingframegeneration,repetition,andremoval.ThedefinitionofMACiscontainedinthispartofISO/IEC9314.3)AnoptionalLogicalLinkControl(LLC),whichprovidesacommonprotocolforanyrequiredpacketdataadaptationservicesbetweenMACandtheNetworkLayer.LLCisnotspecifiedbyFDDI.4)AnoptionalCircuitSwitchingMultiplexer(CS-MUX),whichprovidesacommonprotocolforanyrequiredcircuitdataadaptationservicesbetweenI-MACandtheNetworkLayer.CS-MUXisnotspecifiedbyFDDI.c)AStationManagement(SMT),whichprovidesthecontrolnecessaryatthenodeleveltomanagetheprocessesunderwayinthevariousFDDIlayerssuchthatanodemayworkcooperativelyonaring.SMTprovidesservicessuchascontrolofconfigurationmanagement,faultisolationandrecovery,andscheduling
【中国标准分类号】:M33
【国际标准分类号】:33_180_01;35_110
【页数】:98P;A4
【正文语种】:英语