SJ 2770-1987 短波单边带通信设备外部接口
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基本信息
| 标准名称： | 短波单边带通信设备外部接口 |
| 英文名称： | External interface for shortwave single-sideband communication equipment |
| 中标分类： | 电子元器件与信息技术 >> 电真空器件 >> 收、发信管 |
| 替代情况： | 被SJ/T 10656-95代替 |
| 发布日期： | |
| 实施日期： | 1987-10-01 |
| 首发日期： | |
| 作废日期： | |
| 出版日期： | |
| 页数： | 7页 |
适用范围
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前言
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目录
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引用标准
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所属分类： 电子元器件与信息技术 电真空器件 收 发信管
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【英文标准名称】:TestMethodforPhosphorusinGasoline
【原文标准名称】:汽油中磷的试验方法
【标准号】:ANSI/ASTMD3231-2007
【标准状态】:作废
【国别】:美国
【发布日期】:2007
【实施或试行日期】:2007-05-22
【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】:机动车燃料;含量测定;石油产品;磷;测试
【英文主题词】:Automotivefuels;Determinationofcontent;Petroleumproducts;Phosphorus;Testing
【摘要】:Thistestmethodcoversthedeterminationofphosphorusgenerallypresentaspentavalentphosphateestersorsalts,orboth,ingasoline.Thistestmethodisapplicableforthedeterminationofphosphorusintherangefrom0.2to40mgP/litreor0.0008to0.15gP/U.S.gal.ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecificwarningstatements,seeSection6and9.5.
【中国标准分类号】:E31
【国际标准分类号】:75_160_20
【页数】:
【正文语种】:英语
【英文标准名称】:StandardTestMethodforDynamicYoung''sModulus,ShearModulus,andPoisson''sRatioforAdvancedCeramicsbySonicResonance
【原文标准名称】:声谐振动测定动态扬氏模量、剪切模量和泊松比的标准试验方法
【标准号】:ASTMC1198-2009
【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】:C28.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:advancedceramics;bar;beam;cylindricalrod;dynamic;elasticmodulus;flexure;elasticproperties;Poisson'sratio;resonance;resonantbeam;shearmodulus;torsion;Young'smodulus;Advancedceramics;Audiooscillator;Dynamicelasticproperties;Elas
【摘要】:Thistestmethodmaybeusedformaterialdevelopment,characterization,designdatageneration,andqualitycontrolpurposes.Itisspecificallyappropriatefordeterminingthemodulusofadvancedceramicsthatareelastic,homogeneous,andisotropic.Thistestmethodisnondestructiveinnature.Onlyminutestressesareappliedtothespecimen,thusminimizingthepossibilityoffracture.Theperiodoftimeduringwhichmeasurementstressisappliedandremovedisoftheorderofhundredsofmicroseconds.Withthistestmethoditisfeasibletoperformmeasurementsathightemperatures,wheredelayedelasticandcreepeffectswouldinvalidatemodulusmeasurementscalculatedfromstaticloading.Thistestmethodhasadvantagesincertainrespectsovertheuseofstaticloadingsystemsformeasuringmoduliinadvancedceramics.Itisnondestructiveinnatureandcanbeusedforspecimenspreparedforothertests.Specimensaresubjectedtominutestrains;hence,themoduliaremeasuredatorneartheoriginofthestress-straincurvewiththeminimumpossibilityoffracture.Theperiodoftimeduringwhichmeasurementstressisappliedandremovedisoftheorderofhundredsofmicroseconds.Withthistestmethoditisfeasibletoperformmeasurementsathightemperatures,wheredelayedelasticandcreepeffectswouldinvalidatemodulusmeasurementscalculatedfromstaticloading.Thesonicresonantfrequencytechniquecanalsobeusedasanondestructiveevaluationtoolfordetectingandscreeningdefects(cracks,voids,porosity,densityvariations)inceramicparts.Thesedefectsmaychangetheelasticresponseandtheobservedresonantfrequencyofthetestspecimen.GuideE2001describesaprocedurefordetectingsuchdefectsinmetallicandnonmetallicpartsusingtheresonantfrequencymethod.1.1Thistestmethodcoversthedeterminationofthedynamicelasticpropertiesofadvancedceramics.Specimensofthesematerialspossessspecificmechanicalresonantfrequenciesthataredeterminedbytheelasticmodulus,mass,andgeometryofthetestspecimen.Therefore,thedynamicelasticpropertiesofamaterialcanbecomputedifthegeometry,mass,andmechanicalresonantfrequenciesofasuitabletestspecimenofthatmaterialcanbemeasured.DynamicYoung''smodulusisdeterminedusingtheresonantfrequencyintheflexuralmodeofvibration.Thedynamicshearmodulus,ormodulusofrigidity,isfoundusingtorsionalresonantvibrations.DynamicYoung''smodulusanddynamicshearmodulusareusedtocomputePoisson''sratio.1.2Thistestmethodmeasurestheresonantfrequenciesoftestspecimensofsuitablegeometrybymechanicallyexcitingthematcontinuouslyvariablefrequencies.Mechanicalexcitationofthebarsisprovidedthroughtheuseofatransducerthattransformsacyclicelectricalsignalintoacyclicmechanicalforceonthespecimen.Asecondtransducersensestheresultingmechanicalvibrationsofthespecimenandtransformsthemintoanelectricalsignal.Theamplitudeandfrequencyofthesignalaremeasuredbyanoscilloscopeorothermeanstodetectresonantvibrationinthedesiredmode.Theresonantfrequencies,dimensions,andmassofthespecimenareusedtocalculatedynamicYoung''smodulusanddynamicshearmodulus.(SeeFig.1)1.3Thistestmethodisspecificallyappropriateforadvancedceramicsthatareelastic,homogeneous,andisotropic(3).Advancedceramicsofacompositecharacter(particulate,whisker,orfiberreinforced)maybetestedbythistestmethodwiththeunderstandingthatthecharacter(volumefraction,size,morphology,distribution,orientation,elasticproperties,andinterfacialbonding)ofthereinforcementinthetest......
【中国标准分类号】:Q30
【国际标准分类号】:
【页数】:11P.;A4
【正文语种】:英语
【原文标准名称】:汽油中磷的试验方法
【标准号】:ANSI/ASTMD3231-2007
【标准状态】:作废
【国别】:美国
【发布日期】:2007
【实施或试行日期】:2007-05-22
【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】:机动车燃料;含量测定;石油产品;磷;测试
【英文主题词】:Automotivefuels;Determinationofcontent;Petroleumproducts;Phosphorus;Testing
【摘要】:Thistestmethodcoversthedeterminationofphosphorusgenerallypresentaspentavalentphosphateestersorsalts,orboth,ingasoline.Thistestmethodisapplicableforthedeterminationofphosphorusintherangefrom0.2to40mgP/litreor0.0008to0.15gP/U.S.gal.ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecificwarningstatements,seeSection6and9.5.
【中国标准分类号】:E31
【国际标准分类号】:75_160_20
【页数】:
【正文语种】:英语
【英文标准名称】:StandardTestMethodforDynamicYoung''sModulus,ShearModulus,andPoisson''sRatioforAdvancedCeramicsbySonicResonance
【原文标准名称】:声谐振动测定动态扬氏模量、剪切模量和泊松比的标准试验方法
【标准号】:ASTMC1198-2009
【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】:C28.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:advancedceramics;bar;beam;cylindricalrod;dynamic;elasticmodulus;flexure;elasticproperties;Poisson'sratio;resonance;resonantbeam;shearmodulus;torsion;Young'smodulus;Advancedceramics;Audiooscillator;Dynamicelasticproperties;Elas
【摘要】:Thistestmethodmaybeusedformaterialdevelopment,characterization,designdatageneration,andqualitycontrolpurposes.Itisspecificallyappropriatefordeterminingthemodulusofadvancedceramicsthatareelastic,homogeneous,andisotropic.Thistestmethodisnondestructiveinnature.Onlyminutestressesareappliedtothespecimen,thusminimizingthepossibilityoffracture.Theperiodoftimeduringwhichmeasurementstressisappliedandremovedisoftheorderofhundredsofmicroseconds.Withthistestmethoditisfeasibletoperformmeasurementsathightemperatures,wheredelayedelasticandcreepeffectswouldinvalidatemodulusmeasurementscalculatedfromstaticloading.Thistestmethodhasadvantagesincertainrespectsovertheuseofstaticloadingsystemsformeasuringmoduliinadvancedceramics.Itisnondestructiveinnatureandcanbeusedforspecimenspreparedforothertests.Specimensaresubjectedtominutestrains;hence,themoduliaremeasuredatorneartheoriginofthestress-straincurvewiththeminimumpossibilityoffracture.Theperiodoftimeduringwhichmeasurementstressisappliedandremovedisoftheorderofhundredsofmicroseconds.Withthistestmethoditisfeasibletoperformmeasurementsathightemperatures,wheredelayedelasticandcreepeffectswouldinvalidatemodulusmeasurementscalculatedfromstaticloading.Thesonicresonantfrequencytechniquecanalsobeusedasanondestructiveevaluationtoolfordetectingandscreeningdefects(cracks,voids,porosity,densityvariations)inceramicparts.Thesedefectsmaychangetheelasticresponseandtheobservedresonantfrequencyofthetestspecimen.GuideE2001describesaprocedurefordetectingsuchdefectsinmetallicandnonmetallicpartsusingtheresonantfrequencymethod.1.1Thistestmethodcoversthedeterminationofthedynamicelasticpropertiesofadvancedceramics.Specimensofthesematerialspossessspecificmechanicalresonantfrequenciesthataredeterminedbytheelasticmodulus,mass,andgeometryofthetestspecimen.Therefore,thedynamicelasticpropertiesofamaterialcanbecomputedifthegeometry,mass,andmechanicalresonantfrequenciesofasuitabletestspecimenofthatmaterialcanbemeasured.DynamicYoung''smodulusisdeterminedusingtheresonantfrequencyintheflexuralmodeofvibration.Thedynamicshearmodulus,ormodulusofrigidity,isfoundusingtorsionalresonantvibrations.DynamicYoung''smodulusanddynamicshearmodulusareusedtocomputePoisson''sratio.1.2Thistestmethodmeasurestheresonantfrequenciesoftestspecimensofsuitablegeometrybymechanicallyexcitingthematcontinuouslyvariablefrequencies.Mechanicalexcitationofthebarsisprovidedthroughtheuseofatransducerthattransformsacyclicelectricalsignalintoacyclicmechanicalforceonthespecimen.Asecondtransducersensestheresultingmechanicalvibrationsofthespecimenandtransformsthemintoanelectricalsignal.Theamplitudeandfrequencyofthesignalaremeasuredbyanoscilloscopeorothermeanstodetectresonantvibrationinthedesiredmode.Theresonantfrequencies,dimensions,andmassofthespecimenareusedtocalculatedynamicYoung''smodulusanddynamicshearmodulus.(SeeFig.1)1.3Thistestmethodisspecificallyappropriateforadvancedceramicsthatareelastic,homogeneous,andisotropic(3).Advancedceramicsofacompositecharacter(particulate,whisker,orfiberreinforced)maybetestedbythistestmethodwiththeunderstandingthatthecharacter(volumefraction,size,morphology,distribution,orientation,elasticproperties,andinterfacialbonding)ofthereinforcementinthetest......
【中国标准分类号】:Q30
【国际标准分类号】:
【页数】:11P.;A4
【正文语种】:英语
