IEC/PAS 61290-3-1-2002 光纤放大器基本规范.第3-1部分:噪音计算参数.光谱分解器
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来源:标准资料网
【英文标准名称】:Opticalfibreamplifiers-Basicspecification-Part3-1:Testmethodsfornoisefigureparameters;Opticalspectrumanalyzer
【原文标准名称】:光纤放大器基本规范.第3-1部分:噪音计算参数.光谱分解器
【标准号】:IEC/PAS61290-3-1-2002
【标准状态】:作废
【国别】:国际
【发布日期】:2002-04-01
【实施或试行日期】:
【发布单位】:国际电工委员会(IEC)
【起草单位】:IEC/SC86C
【标准类型】:()
【标准水平】:()
【中文主题词】:噪声测量;测量技术;基本规范;噪声因数;光学纤维;规范;噪声计算;光学;光波导;噪音(乱真信号);电气工程;放大器;试验
【英文主题词】:opticalfibres;testing;measuringtechniques;specification;electricalengineering;noisefactors;opticalwaveguides;noisemeasurements;amplifiers;optics;basicspecification;noisefigure;noise(spurioussignals)
【摘要】:
【中国标准分类号】:M33
【国际标准分类号】:33_180_30
【页数】:17P;A4
【正文语种】:英语
Product Code:SAE AS1031
Title:Fitting, Tee, Standard and Reducer, Bulkhead on Run, Internal Port on Side, Flared
Issuing Committee:G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
Scope:No scope available.【英文标准名称】:StandardTestMethodforInSituStressandModulusofDeformationUsingFlatjackMethod
【原文标准名称】:使用扁千斤顶法现场测定变形的应力和模数的标准试验方法
【标准号】:ASTMD4729-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:D18.12
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:creep;flatjackhydraulicpressure;insitustress;modulusofdeformation;Deformation--rock;Drilling(insoil/rock);Fieldtesting--rock;Flatjackmethod;Gages;Isotropicrockspecimens;Modulus--soil/rockapplications;Rockmaterials/properties/analy
【摘要】:TestsinOrthogonalDirections8212;Theflatjackmostaccuratelydeterminesthestressparalleltothelongaxisoftheadit,becausethisstressistheleastaffectedbythepresenceoftheopening.(Theothertangentialstressishighlyconcentrated.)Inaddition,iftheaditisinastressfieldwhereoneofthestressesissignificantlylargerthantheothers(3or4times),certainlocationsintheaditmaybeinverylowcompressiveoreventensilestress.Flatjacktestsintheselocationscangiveanomalousandmisleadingresults.Becauseofthesefactors,thetestaditshouldhaveatleasttwo,andpreferablythree,long(atleast4to5timesthediameter),straightsectionsatabout90x00B0;toeachother.Testingshouldbedistributedevenlyinallthreesectionstoprovideredundantdataand,ifresultsinonesectionareanomalous,toallowtheprogramtoproducesufficientusabledata.Note18212;Notwithstandingthestatementsonprecisionandbiascontainedinthistestmethod;theprecisionofthistestmethodisdependentonthecompetenceofthepersonnelperformingit,andthesuitabilityoftheequipmentandfacilitiesused.AgenciesthatmeetthecriteriaofPracticeD3740aregenerallyconsideredcapableofcompetentandobjectivetesting.UsersofthistestmethodarecautionedthatcompliancewithPracticeD3740doesnotinitselfassurereliabletesting.Reliabletestingdependsonmanyfactors;PracticeD3740providesameansofevaluatingsomeofthosefactors.1.1Theflatjacktestmeasuresstressatarocksurface.Themodulusofdeformationandthelong-termdeformationalproperties(creep)mayalsobeevaluated.1.2AllobservedandcalculatedvaluesshallconformtotheguidelinesforsignificantdigitsandroundingestablishedinPracticeD6026.1.2.1Themethodusedtospecifiyhowdataarecollected,calculated,orrecordedinthisstandardisnotdirectlyrelatedtotheaccuracytowhichthedatacanbeappliedindesignorotheruses,orboth.Howoneappliestheresultsobtainedusingthisstandardisbeyonditsscope.1.3Limitation8212;Theflatjacktestmeasurestheaveragestressnormaltothesurfaceofthetestchamber.Undisturbedstresslevelsmustbedeterminedbytheoreticalinterpretationsofthesedata.1.4AssumptionsandFactorsInfluencingtheData:1.4.1Thestressreliefisassumedtobeanelastic,reversibleprocess.Innonhomogeneousorhighlyfracturedmaterials,thismaynotbecompletelytrue.1.4.2Theequationsassumethattherockmassisisotropicandhomogeneous.Anisotropiceffectsmaybeestimatedbytestingindifferentorientations.1.4.3Theflatjackisassumedtobe100%efficient.Thedesignandsizerequirementsof7.1weredeterminedtosatisfythisrequirementtowithinafewpercent.1.4.4Thejackisassumedtobealignedwiththeprincipalstressesonthesurfaceoftheopening.Shearstressesarenotcanceledbyjackpressure.Orientatingthetestsinthreedirectionsineachplanetestedpreventsthemisalignmentfrombeingexcessiveforatleastoneofthetests.1.5Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwit......
【中国标准分类号】:P21
【国际标准分类号】:93_020
【页数】:6P.;A4
【正文语种】:英语
