【英文标准名称】:Informationtechnology-Qualityofservice:Framework
【原文标准名称】:信息技术服务质量:框架
【标准号】:ISO/IEC13236-1998
【标准状态】:现行
【国别】:国际
【发布日期】:1998-12
【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
【标准类型】:()
【标准水平】:()
【中文主题词】:分规范;数据处理;网络互连;开放系统互连;质量;定义;信息技术;数据服务;信息交换
【英文主题词】:Dataprocessing;Dataservices;Definitions;Informationinterchange;Informationtechnology;Networkinterconnection;OSI;Quality;Sectionalspecification
【摘要】:ThisQOSFrameworkisastructuredcollectionofconceptsandtheirrelationshipswhichdescribesQOS(QualityofService)andenablesthepartitioningof,andrelationshipsbetween,thetopicsrelevanttoQOSinInformationTechnology(IT)tobeexpressedbyacommonmeansofdescription.Inparticular,thisQOSFrameworkisdirectedatITsystemsandtheiruseinprovidingOpenDistributedProcessingservices.ThisQOSFrameworkisintendedtoassistthosedesigningandspecifyingITsystems,andthosedefiningcommunicationsservicesandprotocols,byprovidingguidanceonQOSapplicabletosystems,servicesandresourcesofvariouskinds.ItdescribeshowQOScanbecharacterized,howQOSrequirementscanbespecified,andhowQOScanbemanaged.ThisQOSFrameworkdefinesterminologyandconceptsforQOSinIT.ItintroducestheconceptofQOScharacteristics,whichrepresentthefundamentalaspectsofQOSthataretobemanagedinvariousways;anditdefinesanumberofQOScharacteristicsofparticularimportance.ThesedefinitionsareindependentofhowQOSisrepresentedorcontrolledinarealsystem.ThisFrameworkdescribeshowQOSrequirementscanbeexpressed,andidentifiesanumberofQOSmechanisms(suchasthree-partynegotiation)thatcanbeusedascomponentsofQOSmanagementfunctionstomeetQOSrequirementsofvariouskinds.Italsodescribesthecircumstancesinwhichvariouscombinationsofmechanismsmaybeappropriate.ThisQOSFrameworkprovidesabasisforthespecificationofextensionsandenhancementstoexistingorplannedstandards,asaresultoftheneedfor,andapplicationof,theQOSconceptsdefinedinthisRecommendation|InternationalStandard.ItisnottheintentofthisRecommendation|InternationalStandardtodestabiliseanyexistingRecommendations|InternationalStandards;rather,itisintendedthatthisQOSFrameworkmaybeusedby:·developersofneworrevisedIT-relatedstandardswhichdefineoruseQOSmechanisms;and·ITusersexpressingrequirementsforQOS.ThisQOSFrameworkdoesnotattempttoprovideabasisforthespecificationofperformanceobjectivesornetworksignallingofQOSinpubliccommunicationsnetworks.TheQOSaspectsofthesecommunicationsservicesareaddressedbyotherITU-TRecommendations.TheintentofthisRecommendation|InternationalStandardistoprovideacommonvocabularytobothserviceprovidersandserviceusers.NothinginthisRecommendation|InternationalStandardshouldbeconstruedasplacingrequirementsoneitherserviceprovidersorserviceusers.ItishopedthatacommonapproachandvocabularyforQOSwillassistmultipleserviceproviderstodeliverend-to-endQOStoend-systems.ThisQOSFrameworkspecificallyexcludesthedetailedspecificationofQOSmechanisms.ItisnottheintentofthisRecommendation|InternationalStandardtoserveasanimplementationspecification,tobeabasisforappraisingtheconformanceofimplementations,ortodefineparticularservicesandprotocols.Rather,itprovidesaconceptualandfunctionalframeworkforQOSwhichallowsindependentteamsofexpertstoworkproductivelyonthedevelopmentofRecommendations|InternationalStandards.AsappliedtoOSI,thisQOSFrameworkisconsistentwiththeOSIBasicReferenceModelinthatitdescribesoperationsandmechanismswhichareassignabletolayersasspecifiedintheOSIBasicReferenceModel.ItisconsistentwiththeOSIManagementFramework(seeITU-TRec.X.700|ISO/IEC7498-4)andtheSystemsManagementOverview(seeITU-TRec.X.701|ISO/IEC10040)initsassignmentoffunctionstomanagemententities.InAnnexA,thisQOSFrameworkpresentsamodelofQOSforOSIwhichidentifiestheentitiesthatparticipateinthemanagementofQOS,definestheflowofQOS-relatedinformationbetweenthemanddescribeshowthisinformationisused.
【中国标准分类号】:M11
【国际标准分类号】:35_100_05
【页数】:48P.;A4
【正文语种】:英语


【英文标准名称】:Structuraluseoftimber-Recommendationsforthecalculationbasisforspantables-Ceilingjoists
【原文标准名称】:建筑用木材.第7部分:以指距表为计算基准的推荐标准.第3节::顶棚格栅
【标准号】:BS5268-7.3-1989
【标准状态】:作废
【国别】:英国
【发布日期】:1989-06-30
【实施或试行日期】:1989-06-30
【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】:设计计算;豆;建筑设计;长度;小梁;弯曲构件;恒荷载;方程;施加荷载;剪应力;变形;表(数据);结构设计;负荷;屋顶;木材;结构构件;顶棚;建筑用木料;彼此间隔的;设计
【英文主题词】:Architecturaldesign;Beans;Ceilings;Deadloading;Deformation;Design;Designcalculations;Equations;Flexuralmembers;Imposedloading;Joists;Length;Loading;Roofs;Shearstress;Spaced;Structuraldesign;Structuralmembers;Structuraltimber;Tables(data);Wood
【摘要】:Calculationbasisforpermissibleclearspanforbothsingleandcontinuousspanceilingjoists(withaccess)ofmaximumspacingof610mmwithuniformandconcentratedloads.
【中国标准分类号】:Q71;P23
【国际标准分类号】:91_060_30;91_080_20
【页数】:16P;A4
【正文语种】:英语