GB/T 7436-1987 在模拟电话电路上开放电报及低速数据的时分复用设备技术要求
时间:2024-04-24 01:18:52 来源: 标准资料网 作者:标准资料网 阅读:9659
基本信息
标准名称: | 在模拟电话电路上开放电报及低速数据的时分复用设备技术要求 |
英文名称: | Specifications of TDM equipment operating on analog telephone-type circuit for telegraph and lower-speed data |
中标分类: |
通信、广播 >>
通信设备 >>
数据通信设备 |
ICS分类: |
电信、音频和视频技术 >>
电信系统 >>
数据通信网络
|
发布部门: | 国家标准局 |
发布日期: | 1987-03-16 |
实施日期: | 1987-01-01 |
首发日期: | 1987-03-16 |
作废日期: | 1900-01-01 |
主管部门: | 信息产业部(通信) |
归口单位: | 信息产业部(通信) |
起草单位: | 电信传输所 |
出版日期: | 1900-01-01 |
页数: | 21页 |
适用范围
本标准适用于通过调制解调器在载波话路上传输电报及低速数据,并采用比特交错方式的时分复用设备。符合本标准的时分复用设备也可用于(通过或不通过基带调制解调器)本地传输,还可作为较高等级时分复用系统中的子设备。
前言
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引用标准
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所属分类: 通信 广播 通信设备 数据通信设备 电信 音频和视频技术 电信系统 数据通信网络
【英文标准名称】:StandardPracticeforClassificationofSoilsandSoil-AggregateMixturesforHighwayConstructionPurposes
【原文标准名称】:公路建设用土壤和土壤集料混合物的分类的标准方法
【标准号】:ASTMD3282-2009
【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】:D18.07
【标准类型】:(Classification)
【标准水平】:()
【中文主题词】:
【英文主题词】:airfields;Atterberglimits;classification;clay;embankments;gradation;gravel;groupindex;highwayconstruction;highways;indexranges;sand;silt;soilaggregatemixtures;soilclassification;soiltests;subgroups;Atterberglimits;Clay;Gradati
【摘要】:Thepracticedescribedclassifiessoilsfromanygeographiclocationintogroups(includinggroupindexes)basedontheresultsofprescribedlaboratoryteststodeterminetheparticle-sizecharacteristics,liquidlimit,andplasticityindex.Theassigningofagroupsymbolandgroupindexcanbeusedtoaidintheevaluationofthesignificantpropertiesofthesoilforhighwayandairfieldpurposes.Thevariousgroupingsofthisclassificationsystemcorrelateinageneralwaywiththeengineeringbehaviorofsoils.Also,inageneralway,theengineeringbehaviorofasoilvariesinverselywithitsgroupindex.Therefore,thispracticeprovidesausefulfirststepinanyfieldorlaboratoryinvestigationforgeotechnicalengineeringpurposes.1.1Thispracticecoversaprocedureforclassifyingmineralandorganomineralsoilsintosevengroupsbasedonlaboratorydeterminationofparticle-sizedistribution,liquidlimit,andplasticityindex.Itmaybeusedwhenapreciseengineeringclassificationisrequired,especiallyforhighwayconstructionpurposes.Evaluationofsoilswithineachgroupismadebymeansofagroupindex,whichisavaluecalculatedfromanempiricalformula.Note18212;Thegroupclassification,includingthegroupindex,shouldbeusefulindeterminingtherelativequalityofthesoilmaterialforuseinearthworkstructures,particularlyembankments,subgrades,subbases,andbases.However,forthedetaileddesignofimportantstructures,additionaldataconcerningstrengthorperformancecharacteristicsofthesoilunderfieldconditionswillusuallyberequired.1.2Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.1.4Thispracticeoffersasetofinstructionsforperformingoneormorespecificoperations.Thispracticecannotreplaceeducationorexperienceandshouldbeusedinconjunctionwithprofessionaljudgment.Notallaspectsofthispracticemaybeapplicableinallcircumstances.Thispracticeisnotintendedtorepresentorreplacethestandardofcarebywhichtheadequacyofagivenprofessionalservicemustbejudged,norshouldthispracticebeappliedwithoutconsiderationofaproject''smanyuniqueaspects.Thewordx201C;Standardx201D;inthetitleofthisdocumentmeansonlythatthedocumenthasbeenapprovedthroughtheASTMconsensusprocess.
【中国标准分类号】:Q13
【国际标准分类号】:93_080_10
【页数】:7P.;A4
【正文语种】:英语
【英文标准名称】:Shipbuilding;Inlandvessels;Operationaldocumentation
【原文标准名称】:造船内河船舶完工文件
【标准号】:ISO3969-1979
【标准状态】:现行
【国别】:国际
【发布日期】:1979-09
【实施或试行日期】:
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO/TC8
【标准类型】:()
【标准水平】:()
【中文主题词】:内河运输;文献;用户与供货者关系;内河航行;造船;消费者与供货者的关系;技术文献
【英文主题词】:shipbuilding;usersupplierrelations;consumer-supplierrelations;documents;inlandnavigation;inlandwaterwaytransport;technicaldocuments
【摘要】:Establishesthepurposeofshipoperationaldocuments,theirclassificationandtitles.Includes,inaddition,thebasicprovisionsforthemaintenanceandpresentationofoperationaldocuments,andfortheprocessoftheircorrectionandreplacementforshipsundergoingmodificationandrepairs.
【中国标准分类号】:U02
【国际标准分类号】:5050;5087
【页数】:12P;A4
【正文语种】:英语