DIN EN 16109-2012 肥料.肥料中复合微量营养离子的测定.木质素磺酸盐鉴定.德文版EN16109-2011
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【英文标准名称】:Fertilizers-Determinationofcomplexedmicro-nutrientionsinfertilizers-Identificationoflignosulfonates;GermanversionEN16109:2011
【原文标准名称】:肥料.肥料中复合微量营养离子的测定.木质素磺酸盐鉴定.德文版EN16109-2011
【标准号】:DINEN16109-2012
【标准状态】:现行
【国别】:德国
【发布日期】:2012-01
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Chemical;Determinationofcontent;Fertilizers;Fertilizing;Hydroxyl;Lignin;Lignosulphates;Mathematicalcalculations;Phenol;Physical;Samples;Samplingmethods;Soilimprovement;Soilimprovingmaterials;Solids;Specification(approval);Sulphurcontent;Testing
【摘要】:
【中国标准分类号】:G21
【国际标准分类号】:65_080
【页数】:19P;A4
【正文语种】:德语
【英文标准名称】:Connectingdevicesforlow-voltagecircuitsforhouseholdandsimilarpurposes;part2-4:particularrequirementsfortwist-onconnectingdevices
【原文标准名称】:家用和类似用途低压电路连接器件第2-4部分:扭接式连接器件的特殊要求
【标准号】:IEC60998-2-4-1993
【标准状态】:作废
【国别】:国际
【发布日期】:1993-05
【实施或试行日期】:
【发布单位】:国际电工委员会(IEC)
【起草单位】:IEC/SC23F
【标准类型】:()
【标准水平】:()
【中文主题词】:紧固件;低压电器;连接设备;规范(认可);夹紧连接;电气工程;夹件;家用
【英文主题词】:
【摘要】:
【中国标准分类号】:L24
【国际标准分类号】:29_120_30
【页数】:39P;A4
【正文语种】:英语
【英文标准名称】:Informationtechnology-Telecommunicationsandinformationexchangebetweensystems-Localandmetropolitanareanetworks-Specificrequirements-Part2:Logicallinkcontrol
【原文标准名称】:信息技术系统间远程通信和信息交换局域网和城域网特殊要求第2部分:逻辑链路控制
【标准号】:ISO/IEC8802-2-1998
【标准状态】:现行
【国别】:国际
【发布日期】:1998-06
【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
【标准类型】:()
【标准水平】:()
【中文主题词】:数据传输方式;逻辑链;网络互连;信息技术;局域网;数据处理;电信;信息交换;规范(验收);开放系统互连;人类
【英文主题词】:Dataprocessing;Informationinterchange;Informationtechnology;Localareanetworks;Logicallinks;MAN;Modeofdatatransmission;Networkinterconnection;OSI;Specification(approval);Telecommunications
【摘要】:ThisInternationalStandardisoneofasetofinternationalstandardsproducedtofacilitatetheinterconnec-tionofcomputersandterminalsonaLocalAreaNetwork(LAN).Itisrelatedtotheotherinternationalstan-dardsbytheReferenceModelforOpenSystemsInterconnection(OSI).NOTE—heexactrelationshipofthelayersdescribedinthisInternationalStandardtothelayersdefinedbytheOSIReferenceModelisunderstudy.ThisInternationalStandarddescribesthefunctions,features,protocol,andservicesoftheLogicalLinkCon-trol(LLC)sublayerintheISO/IEC8802LANProtocol.TheLLCsublayerconstitutesthetopsublayerinthedatalinklayer(seefigure1)andiscommontothevariousmediumaccessmethodsthataredefinedandsupportedbytheISO/IEC8802activity.SeparateInternationalStandardsdescribeeachmediumaccessmethodindividuallyandindicatetheadditionalfeaturesandfunctionsthatareprovidedbytheMediumAccessControl(MAC)sublayerineachcasetocompletethefunctionalityofthedatalinklayerasdefinedintheLANarchitecturalreferencemodel.ThisInternationalStandarddescribestheLLCsublayerservicespecificationstothenetworklayer(Layer3),totheMACsublayer,andtotheLLCsublayermanagementfunction.Theservicespecificationtothenet-worklayerprovidesadescriptionofthevariousservicesthattheLLCsublayer,plusunderlyinglayersandsublayers,offertothenetworklayer,asviewedfromthenetworklayer.TheservicespecificationtotheMACsublayerprovidesadescriptionoftheservicesthattheLLCsublayerrequiresoftheMACsublayer.Theseservicesaredefinedsoastobeindependentoftheformofthemediumaccessmethodology,andofthenatureofthemediumitself.TheservicespecificationtotheLLCsublayermanagementfunctionpro-videsadescriptionofthemanagementservicesthatareprovidedtotheLLCsublayer.Alloftheaboveser-vicespecificationsaregivenintheformofprimitivesthatrepresentinanabstractwaythelogicalexchangeofinformationandcontrolbetweentheLLCsublayerandtheidentifiedservicefunction(networklayer,MACsublayer,orLLCsublayermanagementfunction).Theydonotspecifyorconstraintheimplementa-tionofentitiesorinterfaces.ThisInternationalStandardprovidesadescriptionofthepeer-to-peerprotocolproceduresthataredefinedforthetransferofinformationandcontrolbetweenanypairofdatalinklayerserviceaccesspointsonaLAN.TheLLCproceduresareindependentofthetypeofmediumaccessmethodusedintheparticularLAN.Tosatisfyabroadrangeofpotentialapplications,threetypesofdatalinkcontroloperationareincluded(seeclause4).Thefirsttypeofoperation(seeclause6)providesadata-link-connectionless-modeserviceacrossadatalinkwithminimumprotocolcomplexity.Thistypeofoperationmaybeusefulwhenhigherlayerspro-videanyessentialrecoveryandsequencingservicessothatthesedonotneedreplicatinginthedatalinklayer.Inaddition,thistypeofoperationmayproveusefulinapplicationswhereitisnotessentialtoguaran-teethedeliveryofeverydatalinklayerdataunit.ThistypeofserviceisdescribedinthisInternationalStan-dardintermsof"logicaldatalinks."Thesecondtypeofoperation(seeclause7)providesadata-link-connection-modeserviceacrossadatalinkcomparabletoexistingdatalinkcontrolproceduresprovidedinInternationalStandardssuchasHDLC(seeISO/IEC13239:1997).Thisserviceincludessupportofsequenceddeliveryofdatalinklayerdataunits,andacomprehensivesetofdatalinklayererrorrecoverytechniques.ThissecondtypeofserviceisdescribedinthisInternationalStandardintermsof"datalinkcon-nections."Thethirdtypeofoperation(seeclause8)providesanacknowledged-connectionless-modedataunitexchangeservice,whichpermitsastationtobothsenddataandrequestthe
【中国标准分类号】:M11
【国际标准分类号】:35_110
【页数】:239P.;A4
【正文语种】:英语
