【英文标准名称】:Informationprocessingsystems;OpenSystemsInterconnection;filetransfer,accessandmanagement;Part2:Virtualfilestoredefinition;amendment2:overlappedaccess
【原文标准名称】:信息处理系统开放系统互连文卷传送、访问和管理第2部分:虚文卷存储定义修改2:重叠访问
【标准号】:ISO8571-2AMD2-1993
【标准状态】:现行
【国别】:国际
【发布日期】:1993-08
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/IECJTC1
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Access;Communication;Communicationprocedures;Computernetworks;Computerstoragedevices;Computer-computercommunications;Datacommunication;Dataprocessing;Datastorage;Datatransfer;Datatransmission;EDP;Englishlanguage;Fileaccess;Fileadministrations;Fileorganization(computers);Filetransfer;Files;Filestore;FTAM;Informationexchange;Informationinterchange;Informationprocessing;Management;Networkinterconnection;Officemanagement;Opensystems;Opensystemsinterconnection;OSI;Processing;Technicalterm;Terms;Virtualstore;Vocabulary
【摘要】:ExtendsthedefinitionsgiveninISO8571part2foranabstractmodelofthevirtualfilestorefordescribingfilesandfilestores,setsofactionsthatmaybeusedtomanipulatetheelementsofthismodel,andthepropertiesofindividualfilesandassociationstoincorporatetheconceptsofoverlappedaccess.Theobjectiveinintroducingoverlappedaccessistoallowmoreefficientaccesstostructuredfileswhenasingleinitiatorhasaneedtoperformmanyreadingandupdatingoperations.
【中国标准分类号】:L79
【国际标准分类号】:35_100_01
【页数】:8P.;A4
【正文语种】:英语


【英文标准名称】:StandardTestMethodforTensilePropertiesofFiberReinforcedPolymerMatrixCompositeBars
【原文标准名称】:测量纤维增强聚合物基质复合棒拉伸特性的标准试验方法
【标准号】:ASTMD7205/D7205M-2006
【标准状态】:现行
【国别】:美国
【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】:D30.05
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:tensileproperties;tensilestrength;tensilemodulusofelasticity;bars;compositematerials;compositebars
【摘要】:Thistestmethodisdesignedtoproducelongitudinaltensilestrengthandelongationdata.Fromatensiontest,avarietyofdataareacquiredthatareneededfordesignpurposes.Material-relatedfactorsthatinfluencethetensileresponseofbarsandshouldthereforebereportedincludethefollowing:constituentmaterials,voidcontent,volumepercentreinforcement,methodsoffabrication,andfiberreinforcementarchitecture.Similarly,testfactorsrelevanttothemeasuredtensileresponseofbarsincludespecimenpreparation,specimenconditioning,environmentoftesting,specimenalignmentandgripping,andspeedoftesting.Properties,inthetestdirection,thatmaybeobtainedfromthistestmethodinclude:5.1.1Ultimatetensilestrength,5.1.2Ultimatetensilestrain,5.1.3Tensilechordmodulusofelasticity,and5.1.4Stress-straincurve.1.1Thistestmethoddeterminesthequasi-staticlongitudinaltensilestrengthandelongationpropertiesoffiberreinforcedpolymermatrix(FRP)compositebarscommonlyusedastensileelementsinreinforced,prestressed,orpost-tensionedconcrete.Note1AdditionalproceduresfordeterminingtensilepropertiesofpolymermatrixcompositesmaybefoundintestmethodsD3039/D3039MandD3916.1.2LinearelementsusedforreinforcingPortlandcementconcretearereferredtoasbars,rebar,rods,ortendons,dependingonthespecificapplication.Thistestmethodisapplicabletoallsuchreinforcementswithinthelimitationsnotedinthemethod.Thetestarticlesarereferredtoasbarsinthistestmethod.Ingeneral,barshavesolidcross-sectionsandaregularpatternofsurfaceundulationsand/oracoatingofbondedparticlesthatpromotemechanicalinterlockbetweenthebarandconcrete.Thetestmethodisalsoappropriateforusewithlinearsegmentscutfromagrid.Specificdetailsforpreparingandtestingofbarsandgridsareprovided.Insomecases,anchorsmaybenecessarytopreventgrip-induceddamagetotheendsofthebarorgrid.Recommendeddetailsfortheanchorsareprovidedin.1.3Thestrengthvaluesprovidedbythismethodareshort-termstaticstrengthsthatdonotaccountforsustainedstaticorfatigueloading.Additionalmaterialcharacterizationmayberequired,especiallyforbarsthataretobeusedunderhighlevelsofsustainedorrepeatedloading.Thisstandarddoesnotpurporttoaddressallofthesafetyproblems,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.1.4ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Withinthetext,theinch-poundunitsareshowninbrackets.Thevaluesstatedineachsystemarenotexactequivalents;therefore,eachsystemmustbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewiththestandard.1.5ThisannexdescribestherecommendedanchortofacilitategrippingofFRPbarspecimensforvarioustypesoftestsperformedundertensileloading.Italsospecifiespreparationofthespecimens.Othertypesofanchorsmaybeusedprovideditisdemonstratedthat(a)failureofthebaroccursoutsidetheanchorsand(b)theanchorspreventexcessiveslipofthebarpriortotensilefailure.1.6Thisannexprovidesrecommendationsfortestingbarsinconditionsthatareotherthanstandardlaboratoryconditions.Theseconditionsmayincludeimmersioninwaterorotheraqueoussolutionand/orelevatedtemperatureormoistureconditions.
【中国标准分类号】:Q23
【国际标准分类号】:91_100_40
【页数】:12P.;A4
【正文语种】:英语