MIL-STD-1447 (NOTICE 1)
时间:2024-05-19 06:30:12 来源: 标准资料网 作者：标准资料网 阅读：9182
MIL-STD-1447 (NOTICE 1), MILITARY STANDARD: ETHERS AND ORGANIC PEROXIDES, TECHNICAL GRADE (17 AUG 1998) [NO S/S DOCUMENT]., MIL-STD-1447, dated 24 August 1988, is hereby canceled without replacement.
【英文标准名称】:Dimensionsforradiographicfilms
【原文标准名称】:射线摄影胶片尺寸
【标准号】:JISK7521-1993
【标准状态】:作废
【国别】:日本
【发布日期】:
【实施或试行日期】:
【发布单位】:日本工业标准调查会(JISC)
【起草单位】:ConsumerLife
【标准类型】:()
【标准水平】:()
【中文主题词】:射线摄影胶片;散页片;尺寸;尺寸;胶卷规格;胶卷;医疗放射照相术;X射线;摄影胶片;摄影胶片规格
【英文主题词】:radiographicfilm;photographicfilmformat;dimensions;photographicfilm;sheetfilm;size;x-rays;rollfilm;roll-filmsize;
【摘要】:
【中国标准分类号】:G81
【国际标准分类号】:37_040_25
【页数】:16P;A4
【正文语种】:日语
【英文标准名称】:GuideforIdentificationofMetalsandAlloysinComputerizedMaterialPropertyDatabases
【原文标准名称】:计算机化材料特性数据库的金属和合金的识别指南
【标准号】:ASTME1338-2009
【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】:B08.01
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:
【英文主题词】:alloys;computerizeddatabases;computerizedmaterialpropertydatabases;databases;dataelements;metals;Alloys;Computerizedmaterialpropertydatabases;Identification;Metalsandmetallicmaterials
【摘要】:Thisguidedescribesthetypesofinformationthatareindispensableforuniquelyidentifyingametaloralloyinacomputerizeddatabase.Thepurposeistofacilitatestandardizedstorageandretrievaloftheinformationwithacomputer,andallowmeaningfulcomparisonofdatafromdifferentsources.Manynumberingsystemsformetalsandalloyshavebeendevelopedwhicharebasedontheirchemicalcompositions.Separatesystemshavealsoevolvedtodescribethethermomechanicalconditionofmetalsandalloysinordertonarrowtheirdescription.Itistheseparationintologicaldataelementsfromthesecomplex,historicallysignificant,andoverlappingsystemsofidentificationthatisthechallengeintheidentificationofmetalsandalloyswithincomputerizeddatabases.Thisguideisintendedtoprovideacommonstartingpointfordesignersandbuildersofmaterialspropertydatabases.Thisguidegenerallyidentifiesthecontentsofthedatabaseintermsofdataelements,butdoesnotrecommendanyparticularlogicalorphysicaldatabasedesign.Adatabasebuilderhasconsiderableflexibilityindesigningadatabaseschema,anditisintendedthatthisguidesupportthatflexibility.Itisrecognizedthatmaterialpropertydatabaseswillbedesignedfordifferentlevelsofmaterialinformationandfordifferentpurposes.Forexample,adatabasedevelopedbyanindustrytradegroupmightonlyidentifytypicalpropertiesgenerallyrepresentativeofthoseforaparticularmetaloralloy,andnotactualvaluesmeasuredonaspecificsample.Ontheotherhand,abusinessmightdesiretomanagedataonspecificlotsitprocures,orevenpropertiesofaspecificpieceorsamplefromalot.Consequently,someofthedataelementsidentifiedinthisguidemightnotbeapplicableineverydatabaseinstance.Theextentofmaterialidentificationimplementedinaparticulardatabasedependsonitsspecificpurpose.Asingleorganizationmayincludesubstantialdetailinitsdatabase.Lessdetailmaybeincludedinacommondatabaseusedbyseveralorganizationsbecauseofcommercialandotherconsiderations.Sincemetalsandalloysarediverseandthetechnologiesarealwayschanging,recommendationsshouldnotberegardedasexclusiveofadditionaldataelementsformaterialidentification.Therecommendeddataelementsshouldbeexpandedifadditionaldetailedinformationwhichservestoidentifymaterialsistoberecorded.Anumberofdataelementsareconsideredessentialtoanydatabaseandneedtoexistinthedatabase.Dataelementsareconsideredessentialiftheyarerequiredforuserstohavesufficientinformationtointerpretthedataandbeconfidentoftheirabilitytocomparesetsofdataformaterialsfromdifferentsources.Failuretocompleteanessentialdataelementmayrendertherecordunusableinadatabaseorindataexchange.Essentialreferstothequalityorcompletenessofrecordeddata,anddoesnotnecessarilyhavedirectmeaningrelativetodatabasestructure.Insomecases,theidentifieddataelementmightbeaccommodatedwithinaparticulardatabasewithoutexplicitlyincludingafieldjustfortheessentialdataelement.Additionally,adatabaseschemamayrequireadditionaldatafieldstobenotnulltomaintaindatarecordintegrityortoimplementamandatorydatarelationship.Theseadditionalfieldsarebeyondthescopeofthisguide.Finally,itisalsonotedthatadataelementidentifiedasessentialinthisguidemightnotberelevantforadatabasecreatedforaspecificapplicationoflimitedscope.Thisguidepresentsalistingofthedataelementsanddoesnotintendtodefineanysingleorganizationofthedataelementstobeusedineitheralogicalorphysicalmodelforthedatabase.Thedataelementlistsaredividedbygroupheadingsfordiscussionpurposesonly.Thegroupheadingsarenotintendedtoidentifynormalizationof......
【中国标准分类号】:H07
【国际标准分类号】:77_120_01
【页数】:9P.;A4
【正文语种】:英语