【英文标准名称】:StandardTestMethodforIntensityofScratchesonAerospaceGlassEnclosures
【原文标准名称】:航空航天用玻璃外壳抗划痕硬度的标准试验方法
【标准号】:ASTMF428-2009
【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】:F07.08
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:glassscratches;scratches;windscreenquality;windscreenscratches;Aerospacetransparentenclosures;Glassaerospacematerials/applications;Resistance--aircraft/aerospacematerials;Scratchintensity;Visualexamination--aerospaceapplications
【摘要】:Scratchesexistonallglasssurfaces.Oftenthereareveryfinescratchesfromcleaningoperationsthatarenotvisiblewhenlookingthroughtheglass.Visiblescratchesmaybedistractingtotheobserverlookingthroughthetransparency.Therefore,aproceduretodefinetheseverityscratchesisuseful.Avisualstandardisusedbecauseitisnotpracticaltomeasurethedimensionsofthefinescratchesinthescopeofthistestmethod.1.1Thistestmethodcoversthevisualinspectionofscratchesontheglasssurfaceofaerospacetransparentenclosures.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandardmayinvolvehazardousmaterials,operations,andequipment.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:V13
【国际标准分类号】:49_045
【页数】:5P.;A4
【正文语种】:英语
【英文标准名称】:Statisticalaspectsofsamplingfrombulkmaterials-Samplingofparticulatematerials
【原文标准名称】:从散装物料中抽样的统计方法.颗粒状物料的抽样
【标准号】:BSISO11648-2-2001
【标准状态】:现行
【国别】:英国
【发布日期】:2001-12-05
【实施或试行日期】:2001-12-05
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:动态试验;粒状材料;抽样方法;统计学;统计方法分析;散装物料
【英文主题词】:Bulkgoods;Bulkmaterials;Definition;Definitions;Materialbehaviour;Premixedmaterials;Samples;Sampling;Samplingmethods;Specimenpreparation;Statisticalmethodsofanalysis;Statistics;Testspecimens
【摘要】:ThispartofISO11648establishesthebasicmethodsforsamplingparticipatematerialsinbulk(e.g.ores,mineralconcentrates,coal,industrialchemicalsinpowderorgranularform,andagriculturalproductssuchasgrain)frommovingstreamsandstationarysituations,includingstopped-beltsampling,toprovidesamplesformeasuringoneormorevariablesinanunbiasedmannerandwithaknowndegreeofprecision.Thevariablesaremeasuredbychemicalanalysisand/orphysicaltesting.Thesesamplingmethodsareapplicabletomaterialsthatrequireinspectiontoverifycompliancewithproductspecificationsorcontractsettlements,tocalculatethevalueofthelotmeanofameasurablequantityasabasisforsettlementbetweentradingpartners,ortoestimatethesetofvariablesandvariancesthatdescribesasystemorprocedure.Stopped-beltsamplingisthereferencemethodagainstwhichothersamplingproceduresarecompared.Dynamicsamplingfrommovingstreamsisthepreferredmethodwherebyasamplingdevice(calledacutter)ispassedthroughthestreamoftheparticulatematerial.Acompletecross-sectionofthemovingstreamcanberemovedasaprimaryincrementataconveyorbelttransferpointwithafalling-streamcutter,orremovedfromthebeltwithacross-beltcutter.Inbothcases,theselectionandextractionofincrementscanbedescribedbyaone-dimensionaidynamicsamplingmodel.Staticsamplingofbulkmaterialfromstationarysituations,suchasstockpiles,railorroadwagons,theholdsofshipsandbarges,silos,andevencomparativelysmallvolumes,isusedonlywheresamplingfrommovingstreamsisnotpossible.Suchsamplingfromthree-dimensionallotsispronetosystematicerrors,becausesomepartsofthelotusuallyhavereducedornochanceofbeingcollectedforthegrosssample.Thisisinviolationoftherequirementofthethree-dimensionalsamplingmodelthatallpartshaveanequalprobabilityofbeingcollected.TheproceduresdescribedinthispartofISO11648forsamplingfromstationarylotsofbulkparticulatematerialwithimplementssuchasmechanicalaugersmerelyminimizesomeofthesystematicsamplingerrors.Forthesereasons,thispartofISO11648isprimarilyconcernedwithdynamicsamplingfrommovingstreamsorstopped-beltstaticsamplingfromconveyorbeltsandisbasedonasamplingmodelforone-dimensionallots.Nonetheless,proceduresforstaticsamplingfromthree-dimensionallotsareprovidedwherethesesituationscannotbeavoided.ThispartofISO11648isconcernedwiththemethodsofsamplingparticulatematerialsinbulkwiththeobjectiveofobtainingunbiasedmeasurementsofoneormorevariablesofthematerialwithaknowndegreeofprecision.However,itdoesnotprovidemethodsfordecidingwhethertoacceptorrejectabulkmateriallotwithspecifieddegreesofriskofacceptingasub-standardlot,orofrejectingwhatisinfactanacceptablelot.Theselatterproceduresareusuallycalledacceptancesamplingorsamplinginspectionmethods.
【中国标准分类号】:A80
【国际标准分类号】:03_120_30
【页数】:112P.;A4
【正文语种】:英语
基本信息
| 标准名称： | 客车 门窗用橡胶密封条 |
| 英文名称： | Buses--Rubber sealing strips of doors and windows |
| 中标分类： |
车辆 >>
汽车底盘与车身 >>
车身（驾驶室）及附件 |
| 替代情况： | 调整为QC/T 639-2000 |
| 发布日期： | 1900-01-01 |
| 实施日期： | 1991-05-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 1900-01-01 |
| 出版日期： | 1900-01-01 |
| 页数： | 3页 |
适用范围
没有内容
前言
没有内容
目录
没有内容
引用标准
没有内容
所属分类： 车辆 汽车底盘与车身 车身（驾驶室）及附件