BS EN 61280-2-3-2009 光纤通信子系统的试验程序.数字系统.抖动和漂移测量
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【英文标准名称】:Fibreopticcommunicationsubsystemtestprocedures-Digitalsystems-Jitterandwandermeasurements
【原文标准名称】:光纤通信子系统的试验程序.数字系统.抖动和漂移测量
【标准号】:BSEN61280-2-3-2009
【标准状态】:现行
【国别】:英国
【发布日期】:2010-04-30
【实施或试行日期】:2010-04-30
【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】:通信系统;定义;偏差;数字信号;电气工程;光纤;跳动;测量;测量技术;光学测量;光学试验;光波导;光学;参数;评定;信号处理;信号传输;子系统;电信;试验;漂移
【英文主题词】:Communicationsystems;Definitions;Deviations;Digitalsignals;Electricalengineering;Fibreoptics;Jitter;Measurement;Measuringtechniques;Opticalmeasurement;Opticaltests;Opticalwaveguides;Optics;Parameters;Ratings;Signalprocessing;Signaltransmission;Subsystems;Telecommunications;Testing;Wander
【摘要】:ThispartofIEC61280specifiesmethodsforthemeasurementofthejitterandwanderparametersassociatedwiththetransmissionandhandlingofdigitalsignals.1.1TypesofjittermeasurementsThisstandardcoversthemeasurementofthefollowingtypesofjitterparameters:a)jittertolerance1)sinusoidalmethod2)stressedeyemethodb)jittertransferfunctionc)outputjitterd)systematicjittere)jitterseparation1.2TypesofwandermeasurementsThisstandardcoversthemeasurementofthefollowingtypesofwanderparameters:a)non-synchronizedwanderb)TDEVtolerancec)TDEVtransferd)synchronizedwander
【中国标准分类号】:M33
【国际标准分类号】:33_180_01
【页数】:44P.;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodforTorsionalRingShearTesttoDetermineDrainedResidualShearStrengthofCohesiveSoils
【原文标准名称】:用扭矩环剪切试验测定粘性土壤排水残余抗剪强度的标准试验方法
【标准号】:ASTMD6467-2006a
【标准状态】:现行
【国别】:
【发布日期】:2006
【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】:D18.05
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:粘性土;环剪切试验;环形试验;剪切强度;土壤;试验方法
【英文主题词】:consolidated;drainedtestconditions;Mohr-Coulombstrengthenvelope;reconstitutedspecimens;residualshearstrength;ring-sheartest
【摘要】:Theapparatuskeepsthecross-sectionalareaoftheshearsurfaceconstantduringshearandshearsthespecimencontinuouslyinonerotationaldirectionforanymagnitudeofdisplacement.Thisallowsclayparticlestobecomeorientedparalleltothedirectionofshearandaresidualstrengthconditiontodevelop.Theapparatusallowsareconstitutedspecimentobeoverconsolidatedandpreshearedpriortodrainedshearing.Thissimulatesthefieldconditionsthatleadtoapreexistingshearsurfacealongwhichthedrainedresidualstrengthcanbemobilized.Theringsheartestissuitedtotherelativelyrapiddeterminationofdrainedresidualshearstrengthbecauseoftheshortdrainagepaththroughthethinspecimen,andthecapabilityoftestingonespecimenunderdifferentnormalstressestoquicklyobtainashearstrengthenvelope.Thetestresultsareprimarilyapplicabletoassesstheshearstrengthinslopesthatcontainapreexistingshearsurface,suchasoldlandslides,andshearedbeddingplanes,joints,orfaults.Note18212;Notwithstandingthestatementsonprecisionandbiascontainedinthistestmethod:Theprecisionofthistestmethodisdependentonthecompetenceofthepersonnelperformingitandthesuitabilityoftheequipmentandfacilitiesused.AgenciesthatmeetthecriteriaofPracticeD3740aregenerallyconsideredcapableofcompetenttesting.UsersofthistestmethodarecautionedthatcompliancewithPracticeD3740doesnotensurereliabletesting.Reliabletestingdependsonseveralfactors;PracticeD3740providesameansofevaluatingsomeofthosefactors.1.1Thistestmethodprovidesaprocedureforperformingatorsionalringsheartestunderadrainedconditiontodeterminetheresidualshearstrengthofcohesivesoils.Anundisturbedspecimencanbeusedfortesting.However,obtaininganaturalslipsurfacespecimen,determiningthedirectionoffieldshearing,andtrimmingandproperlyaligningtheusuallynon-horizontalshearsurfaceintheringshearapparatusisdifficult.Asaresult,thistestmethodfocusesontheuseofareconstitutedspecimentomeasuretheresidualstrength.Thistestmethodisperformedbydeformingapresheared,reconstitutedspecimenatacontrolleddisplacementrateuntiltheconstantminimumdrainedshearresistanceisofferedonasingleshearplanedeterminedbytheconfigurationoftheapparatus.Anunlimitedamountofcontinuoussheardisplacementcanbeachievedtoobtainaresidualstrengthcondition.Generally,threeormorenormalstressesareappliedtoatestspecimentodeterminethedrainedresidualfailureenvelope.Aseparatetestspecimenmaybeusedforeachnormalstress.1.2Ashearstress-displacementrelationshipmaybeobtainedfromthistestmethod.However,ashearstress-strainrelationshiporanyassociatedquantity,suchasmodulus,cannotbedeterminedfromthistestmethodbecausepossiblesoilextrusionandvolumechangepreventsdefiningtheheightneededintheshearstraincalculations.Asaresult,shearstraincannotbecalculatedbutsheardisplacementcanbecalculated.1.3Theselectionofnormalstressesandfinaldeterminationoftheshearstrengthenvelopefordesignanalysesandthecriteriatointerpretandevaluatethetestresultsaretheresponsibilityoftheengineerorofficerequestingthetest.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesstatedininch-poundunitsareapproximated.1.5AllmeasuredandcalculatedvaluesshallconformtotheguidelinesforsignificantdigitsandroundingestablishedinPracticeD6026.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistherespo......
【中国标准分类号】:B11
【国际标准分类号】:13_080_20
【页数】:6P.;A4
【正文语种】:
基本信息
| 标准名称： | 石油修井机使用与维护 |
| 中标分类： |
石油 >>
石油勘探、开发、集输设备 >>
石油钻采设备与仪器 |
| 替代情况： | 被SY/T 6117-2003代替 |
| 发布日期： | 1995-01-18 |
| 实施日期： | 1995-07-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 1900-01-01 |
| 出版日期： | 1900-01-01 |
| 页数： | 8页 |
适用范围
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前言
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所属分类： 石油 石油勘探 开发 集输设备 石油钻采设备与仪器
