ISO/IEC 13156-2011 信息技术.系统间远程通讯和信息交换.高速率达到60GHz,PHY,MAC和PALs
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【英文标准名称】:Informationtechnology-Telecommunicationsandinformationexchangebetweensystems-Highrate60GHzPHY,MACandPALs
【原文标准名称】:信息技术.系统间远程通讯和信息交换.高速率达到60GHz,PHY,MAC和PALs
【标准号】:ISO/IEC13156-2011
【标准状态】:现行
【国别】:国际
【发布日期】:2011-10
【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/IECJTC1/SC6
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Adapters;Antennas;Applications;Audio;Audioappliances;Bandoffrequencies;Cableless;Channels;Circuitnetworks;Codes;Communicationnetworks;Communicationprotocol;Communicationservice;Communicationsystems;Communicationtransmissionlines;Compatibility;Control;Datacommunication;Dataexchange;Dataformats;Datanetwork;Dataprocessing;Datatransfer;Definitions;Design;Deviceconfiguration;Electricalengineering;Entertainmentelectronics;Exchange;HDMI;HighDefinitionMultimediaInterface;Informationinterchange;Informationtechnology;Interfaces;Interfaces(dataprocessing);Interoperability;MAC;Mediumaccesscontrol;Multimedia;Networkinterconnection;PAL;Physicallayers;Radiosignals;Receivers;Receptiondevices;Signaltransmission;Specification(approval);Systems;Telecommunication;Telecommunications;Televisionreception;Televisiontechnology;Transmissionprotocol;Video;Videoequipment;Videotaperecorders;Widebandtransmission;Wireless
【摘要】:
【中国标准分类号】:L78
【国际标准分类号】:35_110
【页数】:268P;A4
【正文语种】:英语
【英文标准名称】:StandardPracticesforExtractionofTraceElementsfromSediments
【原文标准名称】:萃取沉积物中痕量元素的标准实施规程
【标准号】:ASTMD3974-2009
【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】:D19.07
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:extraction;sediments;toxic;traceelements,Acceleratedaging/testing;Airdryingmethod;Aluminum;Bariumcontent--water;Boron;Cadmiumcontent--water;Calciumcontent--water;Chromiumcontent--water;Cobaltcontent--water;Colorimetricanalysis--wat
【摘要】:Industrializedandurbanareashavebeenfoundtodepositanumberoftoxicelementsintoenvironmentswherethoseelementswerepreviouslyeithernotpresentorwerefoundintraceamounts.Consequently,itisimportanttobeabletomeasuretheconcentrationofthesepollution-depositedelementstoproperlystudypollutioneffects.Thisprocedureisconcernedwiththepollution-relatedtraceelementsthataredescribedin4.1ratherthanthoseelementsincorporatedinthesilicatelatticesofthemineralsfromwhichthesedimentswerederived.Thesepollution-relatedtraceelementsarereleasedintothewaterandreadsorbedbythesedimentswithchangesingeneralwaterquality,pHinparticular.Theseelementsareaserioussourceofpollution.Theelementslockedinthesilicatelatticesarenotreadilyavailableinthebiosphere(1-8).Whencomparingthetraceelementconcentrations,itisimportanttoconsidertheparticlesizestobeanalyzed(8,9).Thefinertheparticlethegreaterthesurfacearea.Consequently,apotentiallygreateramountofagiventraceelementcanbeadsorbedonthesurfaceoffine,particulatesamples(4).Forparticlesizessmallerthan80mesh,metalcontentisnolongerdependentonsurfacearea.Therefore,ifthisportionofthesedimentisused,theanalysiswithrespecttosampletype(thatis,sand,salt,orclay)isnormalized.Ithasalsobeenobservedthatthegreatestcontrastbetweenanomalousandbackgroundsamplesisobtainedwhenlessthan80-meshportionofthesedimentisused(4,5).Afterthesampleshavebeendried,caremustbetakennottogrindthesampleinsuchawaytoalterthenaturalparticle-sizedistribution(14.1).Fracturingaparticledisruptsthesilicatelatticeandmakesavailablethoseelementswhichotherwisearenoteasilydigested(6).Normally,aggregatesofdried,naturalsoils,sediments,andmanyclaysdissociateoncethereagentsareadded(14.3and15.2).1.1Thesepracticesdescribethepartialextractionofsoils,bottomsediments,suspendedsediments,andwaterbornematerialstodeterminetheextractableconcentrationsofcertaintraceelements.1.1.1PracticeAiscapableofextractingconcentrationsofaluminum,boron,barium,cadmium,calcium,chromium,cobalt,copper,iron,lead,magnesium,manganese,molybdenum,nickel,potassium,sodium,strontium,vanadium,andzincfromtheprecedingmaterials.Othermetalsmaybedeterminedusingthispractice.Thisextractionisthemorevigorousandmorecomplicatedofthetwo.1.1.2PracticeBiscapableofextractingconcentrationsofaluminum,cadmium,chromium,cobalt,copper,iron,lead,manganese,nickel,andzincfromtheprecedingmaterials.Othermetalsmaybedeterminedusingthispractice.ThisextractionislessvigorousandlesscomplicatedthanPracticeA.1.2Thesepracticesdescribethreemeansofpreparingsamplespriortodigestion:1.2.1Freeze-drying.1.2.2Air-dryingatroomtemperature.1.2.3Acceleratedair-drying,forexample,95x00B0;C.1.3Thedetectionlimitandlinearconcentrationrangeofeachprocedureforeachelementisdependentontheatomicabsorptionspectrophotometricorothertechniqueemployedandmaybefoundinthemanualaccompanyingtheinstrumentused.AlsoseevariousASTMtestmethodsfordeterminingspecificmetalsusingatomicabsorptionspectrophotometrictechniques.1.3.1Thesensitivityofthepracticecanbeadjustedbyvaryingthesa......
【中国标准分类号】:Z16
【国际标准分类号】:13_060_30
【页数】:4P.;A4
【正文语种】:英语
基本信息
标准名称: | 透射式肤色测试图 |
英文名称: | Transparency flesh tone test card |
中标分类: |
通信、广播 >>
广播、电视网 >>
广播、电视系统 |
ICS分类: |
电信、音频和视频技术 >>
电信专用测量设备
|
替代情况: | GB 3175-1982 |
发布部门: | 国家标准局 |
发布日期: | 1987-03-12 |
实施日期: | 1987-11-01 |
首发日期: | 1987-03-12 |
作废日期: | 1900-01-01 |
主管部门: | 国家广播电影电视总局 |
提出单位: | 中华人民共和国广播电影电视部 |
归口单位: | 全国广播电视标准化技术委员会 |
起草单位: | 广播电影电视部广播科学研究所、中国科学院心理研究所、中国图片社 |
起草人: | 鹿遥、林仲贤、孙秀如、李文明 |
出版社: | 中国标准出版社 |
出版日期: | 1900-01-01 |
页数: | 3页 |
适用范围
本标准适用于校正彩色电视摄象机各信道的彩色一致性,也可以在借助于部分仪器的情况下,对电视摄象机信道本身进行平衡调整。
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所属分类: 通信 广播 广播 电视网 广播 电视系统 电信 音频和视频技术 电信专用测量设备