MIL-V-7899C (NOTICE 2)
时间:2024-05-25 19:41:36 来源: 标准资料网 作者：标准资料网 阅读：9144
MIL-V-7899C (NOTICE 2), DETAIL SPECIFICATION: VALVE, CHECK, AIRCRAFT FUEL SYSTEM (09 JUL 2008)., MIL-V-7899C, dated 11 March 1996, remains inactive for new design; however, the document is valid for use.
【英文标准名称】:Identificationcards-Contactlessintegratedcircuit(s)cards-Vicinitycards-Part2:Airinterfaceandinitialization
【原文标准名称】:识别卡无接触点集成电路卡近程卡第2部分:空气接口和初始化
【标准号】:ISO/IEC15693-2-2000
【标准状态】:作废
【国别】:国际
【发布日期】:2000-05
【实施或试行日期】:
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO/IECJTC1
【标准类型】:()
【标准水平】:()
【中文主题词】:数据处理;识别卡;空中接口;IC卡;规范(验收);银行业务;信息交换
【英文主题词】:Airinterfaces;Bankoperations;Dataprocessing;ICcards;Identitycards;Informationinterchange;Specification(approval)
【摘要】:ThispartofISO/IEC15693specifiesthenatureandcharacteristicsofthefieldstobeprovidedforpowerandbi-directionalcommunicationsbetweenvicinitycouplingdevices(VCDs)andvicinitycards(VICCs).ThispartofISO/IEC15693shallbeusedinconjunctionwithotherpartsofISO/IEC15693.ThispartofISO/IEC15693doesnotspecifythemeansofgeneratingcouplingfields,northemeansofcompliancewithelectromagneticradiationandhumanexposureregulationswhichcanvaryaccordingtocountryregulationsand/orstandards.
【中国标准分类号】:L64
【国际标准分类号】:35_240_15
【页数】:13P;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodforFlexuralPerformanceofFiber-ReinforcedConcrete(UsingBeamWithThird-PointLoading)
【原文标准名称】:纤维增强混凝土的弯曲性能的标准试验方法(使用三点负荷简支梁)
【标准号】:ASTMC1609/C1609M-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】:C09.42
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:fiber-reinforcedconcrete;first-peakstrength;flexuraltoughness;peakstrength;residualload;residualstrength;Beamtest;Concrete;Concrete(fiber-reinforced);Flexuraltesting
【摘要】:Thefirst-peakstrengthcharacterizestheflexuralbehaviorofthefiber-reinforcedconcreteuptotheonsetofcracking,whileresidualstrengthsatspecifieddeflectionscharacterizetheresidualcapacityaftercracking.Specimentoughnessisameasureoftheenergyabsorptioncapacityofthetestspecimen.Theappropriatenessofeachparameterdependsonthenatureoftheproposedapplicationandthelevelofacceptablecrackinganddeflectionserviceability.Fiber-reinforcedconcreteisinfluencedindifferentwaysbytheamountandtypeoffibersintheconcrete.Insomecases,fibersmayincreasetheresidualloadandtoughnesscapacityatspecifieddeflectionswhileproducingafirst-peakstrengthequaltooronlyslightlygreaterthantheflexuralstrengthoftheconcretewithoutfibers.Inothercases,fibersmaysignificantlyincreasethefirst-peakandpeakstrengthswhileaffectingarelativelysmallincreaseinresidualloadcapacityandspecimentoughnessatspecifieddeflections.Thefirst-peakstrength,peakstrength,andresidualstrengthsdeterminedbythistestmethodreflectthebehavioroffiber-reinforcedconcreteunderstaticflexuralloading.Theabsolutevaluesofenergyabsorptionobtainedinthistestareoflittledirectrelevancetotheperformanceoffiber-reinforcedconcretestructuressincetheydependdirectlyonthesizeandshapeofthespecimenandtheloadingarrangement.Theresultsofthistestmethodmaybeusedforcomparingtheperformanceofvariousfiber-reinforcedconcretemixturesorinresearchanddevelopmentwork.Theymayalsobeusedtomonitorconcretequality,toverifycompliancewithconstructionspecifications,obtainflexuralstrengthdataonfiber-reinforcedconcretememberssubjecttopurebending,ortoevaluatethequalityofconcreteinservice.Theresultsofthisstandardtestmethodaredependentonthesizeofthespecimen.Note58212;Theresultsobtainedusingonesizemoldedspecimenmaynotcorrespondtotheperformanceoflargerorsmallermoldedspecimens,concreteinlargestructuralunits,orspecimenssawnfromsuchunits.Thisdifferencemayoccurbecausethedegreeofpreferentialfiberalignmentbecomesmorepronouncedinmoldedspecimenscontainingfibersthatarerelativelylongcomparedwiththecross-sectionaldimensionsofthemold.Moreover,structuralmembersofsignificantlydifferentthicknessexperiencedifferentmaximumcrackwidthsforagivenmid-spandeflectionwiththeresultthatfibersundergodifferentdegreesofpull-outandextension.1.1Thistestmethodevaluatestheflexuralperformanceoffiber-reinforcedconcreteusingparametersderivedfromtheload-deflectioncurveobtainedbytestingasimplysupportedbeamunderthird-pointloadingusingaclosed-loop,servo-controlledtestingsystem.1.2Thistestmethodprovidesforthedeterminationoffirst-peakandpeakloadsandthecorrespondingstressescalculatedbyinsertingthemintheformulaformodulusofrupturegiveninEq1.Italsorequiresdeterminationofresidualloadsatspecifieddeflections,thecorrespondingresidualstrengthscalculatedbyinsertingthemintheformulaformodulusofrupturegiveninEq1(seeNote1).Itprovidesfordeterminationofspecimentoughnessbasedontheareaundertheload-deflectioncurveuptoaprescribeddeflection(seeNote2)andthecorrespondingequivalentflexuralstrengthratio.Note18212;Residualstrengthisnotatruestressbutanengineeringstresscomputedusingsimpleengineeringbendingtheoryforlinearelasticmaterialsandgross(uncracked)sectionproperties.Note28212;Specimentoughnessexpressedintermsoftheareaundertheload-deflectioncurveisan......
【中国标准分类号】:Q23
【国际标准分类号】:91_100_40
【页数】:9P.;A4
【正文语种】:英语