BS EN 50421-2006 验证与公众暴露于无线电频率电磁场(30MHz～40GHz)相关的基本限值或参数范围独立广播发射机合格性的产品标准
时间:2024-05-16 15:04:05 来源: 标准资料网 作者：标准资料网 阅读：9289
【英文标准名称】:Productstandardtodemonstratethecomplianceofstandalonebroadcasttransmitterswiththereferencelevelsorthebasicrestrictionsrelatedtopublichumanexposuretoradiofrequencyelectromagneticfields(30MHzto40GHz)
【原文标准名称】:验证与公众暴露于无线电频率电磁场(30MHz～40GHz)相关的基本限值或参数范围独立广播发射机合格性的产品标准
【标准号】:BSEN50421-2006
【标准状态】:现行
【国别】:英国
【发布日期】:2006-07-31
【实施或试行日期】:2006-07-31
【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】:吸收;可听见的;带宽;空白格式;广播工程;广播系统;广播;广播网;广播发射机;外壳辐射;合格证明书;合格;一致性;数据;定义;畸变;效应;电场;电气设备;电气工程;电气测量;电磁的;电磁兼容性;电磁场;电磁辐射;电磁波;电子仪器;EMC;曝光;频率;频率范围;高频;人体;阻抗;信息传递;实验室测试;极限(数学);磁场;测量;测量技术;测量方法;噪声;人;人口;功率消耗;功率输出;性能;辐射影响;无线电设备;无线电网;无线电发射机;额定值;二次辐射;信号;远程通信;测试;传输特性;传输性能;验证;无线的
【英文主题词】:Absorption;Audible;Bandwidths;Blankforms;Broadcastengineering;Broadcastsystems;Broadcasting;Broadcastingnetworks;Broadcastingtransmitters;Caseradiation;Certificatesofconformity;Conformity;Consistency;Data;Definition;Definitions;Distortion;Effects;Electricfields;Electricalappliances;Electricalengineering;Electricalmeasurement;Electromagnetic;Electromagneticcompatibility;Electromagneticfield;Electromagneticfields;Electromagneticradiation;Electromagneticwave;Electronicinstruments;EMC;Exposure;Frequencies;Frequencyranges;Highfrequencies;Humanbody;Impedance;Informationtransfer;Laboratorytesting;Limits(mathematics);Magneticfields;Measurement;Measuringtechniques;Methodsformeasuring;Noise;People;Population;Powerconsumption;Poweroutput;Properties;Radiationaction;Radioequipment;Radionetworks;Radiotransmitters;Ratings;Secondaryemission;Signals;Telecommunication;Testing;Transmissioncharacteristics;Transmissionperformance;Verification;Wireless
【摘要】:Thisproductstandardappliestofixedstandalonebroadcasttransmitteroperatinginthefrequencyrange30MHzto40GHzwhenputonthemarket.Thetermbroadcasttransmittercoversfixedstandalonebroadcasttransmittersintendedforusewithexternalantennasofthesameoranothermanufacturer.Theobjectofthisstandardistodemonstratethecomplianceofsuchequipmentwiththereferencelevelsorthebasicrestrictionsrelatedtopublicexposuretoradiofrequencyelectromagneticfields.
【中国标准分类号】:M74
【国际标准分类号】:13_280;17_220_20
【页数】:12P.;A4
【正文语种】:英语
【英文标准名称】:CastBronzeThreadedFittings,Classes125and250
【原文标准名称】:125级和250级青铜铸造螺纹配件
【标准号】:ANSI/ASMEB16.15-1985
【标准状态】:作废
【国别】:美国
【发布日期】:1985
【实施或试行日期】:
【发布单位】:美国国家标准学会(ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:配件;管联接器;尺寸
【英文主题词】:Bronzes;Castironpipes;Dimensions;Fittings;Marking;Materialsspecification;Metalpipes;Pipecouplings;Pipelaying;Pressuretests;Size;Threadedfasteners
【摘要】:
【中国标准分类号】:J15
【国际标准分类号】:23_040_40
【页数】:
【正文语种】:英语
【英文标准名称】:Informationtechnology-JPSearch-Part1:Systemframeworkandcomponents
【原文标准名称】:信息技术.日本研究.第1部分:系统框架和元数据
【标准号】:ISO/IECTR24800-1-2007
【标准状态】:作废
【国别】:国际
【发布日期】:2007-12
【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/SC29
【标准类型】:()
【标准水平】:()
【中文主题词】:编码(程序设计);数据格式;数据挖掘;数据处理;数据存储;定义;图形数据处理;图像文件;系统映射;图像;信息处理;情报检索;信息技术;联合图像专家组;绘制地图;元数据;图象描述信息;研究;检索;静止图象
【英文主题词】:Coding(programming);Dataformats;Datamining;Dataprocessing;Datastorage;Definition;Definitions;Graphicdataprocessing;Imagefiles;Imagesystems;Images;Informationprocessing;Informationretrieval;Informationtechnology;JPEG;Mapping;Metadata;Picturedescriptioninformation;Research;Retrieval;Stillpictures
【摘要】:1.1InteroperableImageSearchandRetrievalThisTechnicalReportspecifiestwothings.Thefirstisaframeworkforinteroperabilityforstillimagesearchandretrieval.Thesecondidentifiesanarchitectureandthecomponentsinthisframework,thelinkagesbetweencomponents,andwhichofthesecomponentsandlinksaretobestandardizedinJPSearch.Theimagesearchandretrievalframeworkwillbedeterminedbyrealusecases(tasks)andwillleverageonlessonslearntinthelonghistoryoftextretrievalwhere,forexample,differentusersissuingthesamequerymaybelookingfor(very)differentresults.Thisisimportantbecauseitmeansthattheframeworkmustbegeneralenoughtosupportmanypossibleapproachestoimageretrieval,e.g.,fromusingonlylow-levelimagefeatures,totextannotations,tocommunityinput,oramixtureofsuchapproaches.Fromtheframeworkandcomponents,andthelinkagesandflowofdatabetweenthem,thepartsofJPSearchthatneedtobestandardizedcanbedetermined.1.2MotivationTherearemanyapplicationsthatprovideimagesearchandretrievalfunctionalityoncomputerdesktops,ontheWorldWideWeb(i.e.,websearch),onimagingdevices,andinotherconsumerandprofessionalapplications.Theseimplementationsarecharacterizedbysignificantlimitations,including:?Lackoftheabilitytoreusemetadata?Lackofacommonqueryformatandsearchsemantics?Lackofacommonformatforhandlingcontextinsearching1.3OutlineoftheTechnicalReportTherewillbe7clausestothisreport.Theyarearrangedasfollows:Clause2providesdefinitionsoftermsandabbreviations.Clause3reviewsthetraditionalapproachestoimagesearchandfromvariousexamples,motivatestheimportanceoftheuserinthesearchprocess,theimportanceofmakingexplicittheusertaskanduserevaluation,andthatmeaninginimagesmaybeasmuchaddedfromoutsideasextractedfromtheimageitself.Thismotivatesthenextclause,whicharetherealusecases.Clause4describestherealusecasesofthevariouswayssearchingdoestakeplace.Inparticular,therecouldbemultipleentrypointsintotheoverallsearchframework.Thesewouldincludeautomatic,semiautomatic,andhuman(user)drivensearches.Thesewouldincludespecificusecasesandmotivatingexamplesofsearchesforimages.Clause5describestheoverallsearchandmanagementprocess.Thiscanbeconsideredtherequirementsspecificationsforageneralsearchandmanagementarchitecture.Clause6describesthe4-layerarchitectureforJPSearchandexplicitlyidentifiesthecomponentsinthearchitecture,andwhattheirrolesandpositionsareinthearchitecture.WewilldescribehowtheusecasesdescribedinSection3maptothelayersofthisarchitecture.
【中国标准分类号】:L70
【国际标准分类号】:35_040
【页数】:37P.;A4
【正文语种】:英语