YD/T 1550.5-2007 2GHz WCDMA数字蜂窝移动通信网Iub接口技术要求(第一阶段) 第5部分:公共传输信道数据流的数据传输和传输信令
作者:标准资料网 时间:2024-05-20 15:51:03 浏览:8510
来源:标准资料网
基本信息
标准名称: | 2GHz WCDMA数字蜂窝移动通信网Iub接口技术要求(第一阶段) 第5部分:公共传输信道数据流的数据传输和传输信令 |
英文名称: | Technical Specification for 2GHz WCDMA Digital Cellular Mobile Communication Network Iub Interface(Phase I)Part 5:Data Transport & Transport Signaling for Common Transport Channel Data Stream |
中标分类: |
通信、广播 >>
通信网 >>
通信网性能指标及测试 |
ICS分类: |
电信、音频和视频技术 >>
电信系统 >>
电信系统综合
|
发布日期: | 2007-05-16 |
实施日期: | 2007-05-16 |
首发日期: | |
作废日期: | |
出版日期: | |
页数: | 8 |
适用范围
本部分规定了2GHz WCDMA数字蜂窝移动通信网Iub接口技术规范中用于公共传输信道数据流的数据传输和传输信令部分。本部分适用2GHz WCDMA数字蜂窝移动通信网Iub接口。
前言
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目录
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引用标准
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所属分类: 通信 广播 通信网 通信网性能指标及测试 电信 音频和视频技术 电信系统 电信系统综合
【英文标准名称】:Informationtechnology-UnrecordedMagneticTapeCassetteforInformationInterchange3.81mm(0.150In),252to394ftpmm(6400to10000ftpi)
【原文标准名称】:信息交换用未记录盒式磁带.3.81毫米(0.150英寸)磁带、394ftpmm(10000ftpi).物理和磁兼容性要求
【标准号】:ANSIINCITS164-1990
【标准状态】:现行
【国别】:美国
【发布日期】:1990
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:盒式磁带;信息交换;信息处理;情报系统
【英文主题词】:Cassettes(magnetictapes);Informationinterchange;Informationprocessing;Informationsystems
【摘要】:3.81-mm(0.150~in)-widemagnetictapepresentstheminimumrequirementsforthemechanicalandmagneticinterchangeabilityofthecassettebetweeninformationprocessingsystems,usingthephysicalrecordingdensityof394ftpmm(10000ftpi).Thecassetteisofthetwinhubcoplanartype,loadedwith3.81-mm(0.150-in)-widemagnetictape.Accessholesareprovidedfor,andthetapeistransportedbetweenhubsbyexternalreelmotors.Featuresareprovidedfortheuseofexternaltapecapstan(s),tapepositionsensing,andexternaltapeguiding.Thisstandardappliestothecassettesusedfordatainterchange.
【中国标准分类号】:L64
【国际标准分类号】:35_220_23
【页数】:25P.;A4
【正文语种】:英语
【英文标准名称】:StandardGuideforAssessingMicrostructureofPolymericScaffoldsforUseinTissueEngineeredMedicalProducts
【原文标准名称】:组织工程医用产品用聚合物工作台的微观结构的评估的标准指南
【标准号】:ASTMF2450-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【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】:F04.42
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:
【英文主题词】:microstructure;poresize;porevolume;porosity;porousmaterials;tissuescaffolds;Polymericscaffolds;Tissueengineeredmedicalproducts(TEMPs)
【摘要】:Theabilitytoculturefunctionaltissuetorepairdamagedordiseasedtissueswithinthebodyoffersaviablealternativetoxenograftsorheterografts.Usingthepatientx2019;sowncellstoproducethenewtissueofferssignificantbenefitsbylimitingrejectionbytheimmunesystem.Typically,cellsharvestedfromtheintendedrecipientareculturedinvitrousingatemporaryhousingorscaffold.Themicrostructureofthescaffold,thatis,itsporosity,themeansize,andsizedistributionofporesandtheirinterconnectivityiscriticalforcellmigration,growthandproliferation(AppendixX1).Optimizingthedesignoftissuescaffoldsisacomplextask,giventherangeofavailablematerials,differentmanufacturingroutes,andprocessingconditions.Allofthesefactorscan,andwill,affectthesurfacetexture,surfacechemistry,andmicrostructureoftheresultantscaffolds.Factorsthatmayormaynotbesignificantvariablesdependonthecharacteristicsofagivencelltypeatanygiventime(thatis,changesincellbehaviorduetothenumberofpassages,mechanicalstimulation,andcultureconditions).Tissuescaffoldsaretypicallyassessedusinganoverallvalueforscaffoldporosityandarangeofporesizes,thoughthedistributionofsizesisrarelyquantified.Publishedmeanporesizesanddistributionsareusuallyobtainedfromelectronmicroscopyimagesandquotedinthemicrometerrange.Tissuescaffoldsaregenerallycomplexstructuresthatarenoteasilyinterpretedintermsofporeshapeandsize,especiallyinthreedimensions.Therefore,itisdifficulttoquantifiablyassessthebatch-to-batchvarianceinmicrostructureortomakeasystematicinvestigationoftherolethatthemeanporesizeandporesizedistributionhasoninfluencingcellbehaviorbasedsolelyonelectronmicrographs(Tomlinsetal,(1)).Fig.1givesanindicationofpotentialtechniquesthatcanbeusedtocharacterizethestructureofporoustissuescaffoldsandthelengthscalethattheycanmeasure.Clearlyarangeoftechniquesmustbeutilizedifthescaffoldistobecharacterizedindetail.Theclassificationandterminologyofporesizes,suchasthosegiveninTable2,hasyettobestandardized,withdefinitionsoftermsvaryingwidely(asmuchasthreeordersofmagnitude)betweendifferingapplicationsandindustries.BothTable2andthesupportingdetaileddiscussionincludedwithinAppendixX2describedifferencesthatexistbetweenIUPAC(InternationalUnionofPureandAppliedChemistry)definitionsandthecommonterminologycurrentlyutilizedwithinmostlifescienceapplications,whichincludebothimplantandtissueengineeringapplications.Sincetheliteraturecontainsmanyothertermsfordefiningpores(Perretetal(3)),itisrecommendedthatthetermsusedbyauthorstodescribeporesbedefinedinordertoavoidpotentialconfusion.Additionally,sinceanyofthedefinitionsinTable2canshift,dependendingontheporesizedeterminationmethod(seeTable1andFig.1),anaccompanyingstatementdescribingtheutilizedassessmenttechniqueisessential.AllthetechniqueslistedinTable1havelimitationsforassessingcomplexporousstructures.Fig.2aandFig.2bshowathrough-andablind-endporerespectively.Porometrymeasurements(see7.4)areonlysensitivetothenarrowestpointalongavariablediameterthrough-poreandthereforecangivealowermeasureoftheporediameterthanotherinvestigativetechniques,suchasscanningelectronmicroscope(SEM),whichmaysampleatadifferentpointalongthepore.Thephysicalbasisofporometrydependsonthepassageofgasthroughthematerial.Therefore,thetechniqueisnotsensitivetoblind-endorclosedpore.......
【中国标准分类号】:G45
【国际标准分类号】:11_100
【页数】:10P.;A4
【正文语种】:英语