【英文标准名称】:Soilquality.Chemicalmethods.DeterminationofthepotentialcationexchangecapacityandexchangeablecationsusingbariumchloridesolutionbufferedatpH=8.1
【原文标准名称】:土质.化学方法.pH值为8.1时利用氯化钡缓冲溶液对潜在阳离子交换能力和可交换阳离子的测定
【标准号】:BS7755-3.12-1996
【标准状态】:现行
【国别】:英国
【发布日期】:1996-02-15
【实施或试行日期】:1996-02-15
【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】:分析;钡化合物;巴斯科姆;钙;容量;阳离子交换;阳离子;化学分析和测试;土壤组分;测定;交换能力;水力(利)工程;实验室试验;镁;数学计算;pH值;钾;钠;土壤采样;土壤普查;土壤;测试;容量分析
【英文主题词】:Analysis;Bariumcompounds;Bascomb;Calcium;Capacity;Cationexchange;Cations;Chemicalanalysisandtesting;Compositionoftheground;Determination;Exchangecapacity;Hydraulicengineering;Laboratorytests;Magnesium;Mathematicalcalculations;pH;Potassium;Sodium;Soilsampling;Soilsurveys;Soils;Testing;Volumetricanalysis
【摘要】:Applicabletoalltypesofair-driedsamples.
【中国标准分类号】:Z18;B11
【国际标准分类号】:13_080_10
【页数】:14P.;A4
【正文语种】:英语


【英文标准名称】:MobileandportableDVB-T/Hradioaccess-Interfacespecification
【原文标准名称】:移动和便携式DVB-T/H无线电通路.接口规范
【标准号】:BSEN62002-1-2008
【标准状态】:现行
【国别】:英国
【发布日期】:2010-03-31
【实施或试行日期】:2010-03-31
【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】:通路;天线;频带;数字电视;数字视频广播;DVB;电气工程;电磁兼容性;EMC;频率;频率范围;接口;电气连接件用接口;干扰抑制;最低要求;移动无线电通信系统;乱真信号;工作状态;便携的;评定;接收机;规范(验收);电视接收机;终端装置;陆地的;试验;公差(测量);发射机;无线通信业务
【英文主题词】:Access;Antennas;Bandoffrequencies;Digitaltelevision;DigitalVideoBroadcast;DVB;Electricalengineering;Electromagneticcompatibility;EMC;Frequencies;Frequencyranges;Interfaces;Interfacesofelectricalconnections;Interferencerejections;Minimumrequirements;Mobileradiosystems;Noise(spurioussignals);Operatingmode;Portable;Ratings;Receivers;Specification(approval);Televisionreceivers;Terminaldevices;Terrestrial;Testing;Tolerances(measurement);Transmitters;Wirelesscommunicationservices
【摘要】:ThispartofIEC62002isaradioaccessspecificationformobile,portableandhand-heldportabledevicescapableofreceivingDVB-T/Hservices.ItincludesinformativesystemaspectsaswellasspecificationsforminimumRF-performance.Itcoversterminalsinthreemainclasses,namelyintegratedcarterminals,portabledigitalTVsetsandhand-heldportableconvergenceterminals.Interoperabilitywithintegratedcellularradiosisalsoconsidered.Thespecificationcoversthefollowingareas.?Frequencyranges?Supportedmodes?Definitionofreceivingconditions?DefinitionofthereceiverRF-referencemodel?Definitionofdegradationcriteria?Antennacharacteristics?Channelmodels?C/N-performancewithdifferentchannels?Minimumandmaximuminputlevels?Immunitytointerferingsignals?Definitionofanensembleofinterferencepatterns?Tolerancetoimpulseinterference?SFN-performance?Transmitterminimumperformance?Interoperabilityofcellularradios?EMCaspects
【中国标准分类号】:M64
【国际标准分类号】:33_170
【页数】:72P;A4
【正文语种】:英语