DIN 4047-4-1977 农业水利工程.概念.沼泽地耕作
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【英文标准名称】:Agriculturalhydraulics;terms,cultivationofmoorland
【原文标准名称】:农业水利工程.概念.沼泽地耕作
【标准号】:DIN4047-4-1977
【标准状态】:作废
【国别】:德国
【发布日期】:1977-07
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:泥炭;定义;排水;沼泽地耕作;农业
【英文主题词】:definitions;agriculture;cultivationofbogs;peat;drainage
【摘要】:
【中国标准分类号】:B05;P55
【国际标准分类号】:65_060_35
【页数】:7P;A4
【正文语种】:德语
【英文标准名称】:Workmanshiprequirementsforsolderedelectronicassemblies-Part2:Surface-mountassemblies(IEC61192-2:2003);GermanversionEN61192-2:2003
【原文标准名称】:钎焊电子组件的工艺要求.第2部分:表面安装组件
【标准号】:EN61192-2-2003
【标准状态】:现行
【国别】:
【发布日期】:2003-11
【实施或试行日期】:2003-11-01
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:分规范;规范(验收);生产;规范;电子装置;过程控制;表面安装设备;设备;印制电路板;组装件;评定;电气试验;包装件;软钎焊连接;钎焊;设计;表面安装;定义;电气工程;电子设备及元件;训练;覆层;元部件;检验;材料;质量保证
【英文主题词】:Assemblies;Coatings;Components;Definition;Definitions;Design;Electricalengineering;Electricaltesting;Electronicequipmentandcomponents;Electronically-operateddevices;Equipment;Evaluations;Inspection;Materials;Packages;Printed-circuitboards;Processcontrol;Production;Qualityassurance;Sectionalspecification;SMD;Solderedjoints;Solderings;Specification;Specification(approval);Surfacemounting;Training
【摘要】:
【中国标准分类号】:J64
【国际标准分类号】:31_190
【页数】:64P.;A4
【正文语种】:英语
【英文标准名称】:Statisticalaspectsofsamplingfrombulkmaterials-Part2:Samplingofparticulatematerials
【原文标准名称】:块材料抽样的统计方面第2部分：颗粒材料的抽样
【标准号】:ISO11648-2-2001
【标准状态】:现行
【国别】:国际
【发布日期】:2001-10
【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/TC69
【标准类型】:()
【标准水平】:()
【中文主题词】:散装物料;试样制备;统计学;试样;材料特性;散装货物;定义;预混材料;试样;抽样方法;取样;统计方法分析
【英文主题词】:Bulkgoods;Bulkmaterials;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】:A82
【国际标准分类号】:03_120_30
【页数】:102P.;A4
【正文语种】:英语
