【英文标准名称】:Mechanicalstandardizationofsemiconductordevices-Generalrulesforthepreparationofoutlinedrawingsofsurfacemountedsemiconductordevicepackages-Designguidefor1,50mm,1,27mmand1,00mmpitchballandcolumnterminalpackages
【原文标准名称】:半导体装置的机械标准化.表面安装的半导体装置封装外形图绘制的一般规则.1.5mm、1.27mm和1.00mm树脂球和引线端子封装的设计指南
【标准号】:BSEN60191-6-2-2002
【标准状态】:现行
【国别】:英国
【发布日期】:2002-03-29
【实施或试行日期】:2002-03-29
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:半导体;电子设备及元件;作标记;工程图;表面安装设备;设计;指导手册;电气外壳;外壳;电气工程;集成电路;符号;半导体器件;电子工程;定义;尺寸
【英文主题词】:BallGridArray;Definition;Definitions;Design;Dimensions;Drawings;Electricenclosures;Electricalengineering;Electronicengineering;Electronicequipmentandcomponents;Enclosures;Engineeringdrawings;Guidebooks;Integratedcircuits;Marking;Matingdimension;Semiconductordevices;Semiconductors;SMD;Surfacemounting;Surfacemountingdevices;Symbols
【摘要】:ThispartofIEC60191coverstherequirementsforthepreparationofdrawingsofintegratedcircuitoutlinesforthevariousballterminalpackages,e.g.ceramicballgridarray(C-BGA),plasticballgridarray(P-BGA),tapeballgridarray(T-BGA)andothersaswellascolumnterminalpackages,e.g.ceramiccolumngridarray(C-CGA).
【中国标准分类号】:L50
【国际标准分类号】:01_100_25;31_240
【页数】:14P.;A4
【正文语种】:英语


【英文标准名称】:StandardGuideforMeasurementofAtmosphericWindandTurbulenceProfilesbyAcousticMeans
【原文标准名称】:用声学方法测量大气气流和湍流剖面的标准指南
【标准号】:ASTMD7145-2005(2010)e1
【标准状态】:现行
【国别】:美国
【发布日期】:2005
【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】:D22.11
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:
【英文主题词】:acousticsounder;remotesensing;sodar;windprofiler;windprofiling;Wind;Acousticaltests;Airqualityanalysis;Sodar;Turbulence
【摘要】:Sodarshavefoundwideapplicationsfortheremotemeasurementofwindandturbulenceprofilesintheatmosphere,particularlyinthegapbetweenmeteorologicaltowersandthelowerrangegatesofwindprofilingradars.Thesodarx2019;sfarfieldacousticpowerisalsousedforrefractiveindexcalculationsandtoestimateatmosphericstability,heatflux,andmixedlayerdepth(1-5).Sodarsareusefulforthesepurposesbecauseofstronginteractionbetweensoundwavesandtheatmospherex2019;sthermalandvelocitymicro-structurethatproduceacousticreturnswithsubstantialsignal-to-noiseratios(SNR).ThereturnedechoesareDoppler-shiftedinfrequency.Thisfrequencyshift,proportionaltotheradialvelocityofthescatteringsurface,providesthebasisforwindmeasurement.Advantagesofferedbysodarwindsoundingtechnologyincludereasonablylowprocurement,operating,andmaintenancecosts,noemissionsofeye-damaginglightbeamsorelectromagneticradiationrequiringfrequencyclearances,andadjustablefrequenciesandpulselengthsthatcanbeusedtooptimizedataqualityatdesiredrangesandrangeresolutions.Whenproperlysitedandusedwithadequatesamplingmethods,sodarscanprovidecontinuouswindandturbulenceprofileinformationatheightrangesfromafewtensofmeterstooverakilometrefortypicalaveragingperiodsof1to60minutes.1.1Thisguidedescribestheapplicationofacousticremotesensingformeasuringatmosphericwindandturbulenceprofiles.Itincludesasummaryofthefundamentalsofatmosphericsounddetectionandranging(sodar),adescriptionofthemethodologyandequipmentusedforsodarapplications,factorstoconsiderduringsiteselectionandequipmentinstallation,andrecommendedproceduresforacquiringvalidandrelevantdata.1.2Thisguideappliesprincipallytopulsedmonostaticsodartechniquesasappliedtowindandturbulencemeasurementintheopenatmosphere,althoughmanyofthedefinitionsandprinciplesarealsoapplicabletobistaticconfigurations.Thisguideisnotdirectlyapplicabletoradio-acousticsoundingsystems(RASS),ortomographicmethods.
【中国标准分类号】:A42
【国际标准分类号】:17_140_99
【页数】:9P.;A4
【正文语种】:英语