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HB 3381-1982 橡胶注射模通用加热板

作者:标准资料网 时间:2024-05-21 14:56:10  浏览:8572   来源:标准资料网
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基本信息
标准名称:橡胶注射模通用加热板
中标分类: 航空、航天 >> 航空器与航天器制造用设备 >> 模具
发布日期:1982-07-23
实施日期:1982-10-01
首发日期:
作废日期:
出版日期:
页数:4页
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所属分类: 航空 航天 航空器与航天器制造用设备 模具
下载地址: 点击此处下载
【英文标准名称】:Symbolsforcontrolmarkingsanddisplaysontractorsandmachineryforagricultureandforestry,andonpoweredlawnandgardenequipment.Specificationforcommonsymbols
【原文标准名称】:农林用拖拉机以及草坪和园艺机具上的控制标志与显示符号.第1部分:通用符号规范
【标准号】:BS4964Pt.1-1993
【标准状态】:作废
【国别】:英国
【发布日期】:1993-01-15
【实施或试行日期】:
【发布单位】:英国标准学会(BSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:剪草机;图形符号;符号;土方机械;控制装置;控制设备;农用设备;作标记;颜色;汽车起重机;园艺机具;控制板;林业设备;显示装置;农用拖拉机;工业用货车
【英文主题词】:
【摘要】:
【中国标准分类号】:B90
【国际标准分类号】:
【页数】:40P;A4
【正文语种】:英语


【英文标准名称】:StandardGuideforStatisticalEvaluationofAtmosphericDispersionModelPerformance
【原文标准名称】:大气散射模型性能的统计评价的标准指南
【标准号】:ASTMD6589-2005(2010)e1
【标准状态】:现行
【国别】:美国
【发布日期】:2005
【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】:D22.11
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:
【英文主题词】:airquality;model;modelperformance;qualitativeevaluation;quantitativeevaluation;statistical;Statisticalmethods--atmosphericanalysis;Airqualityanalysis;Dispersionmodeling;Models/modeling--atmosphericanalysis;Performance--airanalysi
【摘要】:Guidanceisprovidedondesigningmodelevaluationperformanceproceduresandonthedifficultiesthatariseinstatisticalevaluationofmodelperformancecausedbythestochasticnatureofdispersionintheatmosphere.Itisrecognizedthereareexamplesintheliteraturewhere,knowinglyorunknowingly,modelswereevaluatedontheirabilitytodescribesomethingwhichtheywereneverintendedtocharacterize.Thisguideisattemptingtoheightenawareness,andthereby,toreducethenumberofx201C;unknowingx201D;comparisons.Agoalofthisguideistostimulatedevelopmentandtestingofevaluationproceduresthataccommodatetheeffectsofnaturalvariability.Atechniqueisillustratedtoprovideinformationfromwhichsubsequentevaluationandstandardizationcanbederived.1.1Thisguideprovidestechniquesthatareusefulforthecomparisonofmodeledairconcentrationswithobservedfielddata.Suchcomparisonsprovideameansforassessingamodel''sperformance,forexample,biasandprecisionoruncertainty,relativetoothercandidatemodels.Methodologiesforsuchcomparisonsareyetevolving;hence,modificationswilloccurinthestatisticaltestsandproceduresanddataanalysisasworkprogressesinthisarea.Untiltheinterestedpartiesagreeuponstandardtestingprotocols,differencesinapproachwilloccur.Thisguidedescribesaframework,orphilosophicalcontext,withinwhichonedetermineswhetheramodel''sperformanceissignificantlydifferentfromothercandidatemodels.Itissuggestedthatthefirststepshouldbetodeterminewhichmodel''sestimatesareclosestonaveragetotheobservations,andthesecondstepwouldthentestwhetherthedifferencesseenintheperformanceoftheothermodelsaresignificantlydifferentfromthemodelchoseninthefirststep.AnexampleprocedureisprovidedinAppendixX1toillustrateanexistingapproachforaparticularevaluationgoal.Thisexampleisnotintendedtoinhibitalternativeapproachesortechniquesthatwillproduceequivalentorsuperiorresults.AsdiscussedinSection6,statisticalevaluationofmodelperformanceisviewedaspartofalargerprocessthatcollectivelyisreferredtoasmodelevaluation.1.2Thisguidehasbeendesignedwithflexibilitytoallowexpansiontoaddressvariouscharacterizationsofatmosphericdispersion,whichmightinvolvedoseorconcentrationfluctuations,toallowdevelopmentofapplication-specificevaluationschemes,andtoallowuseofvariousstatisticalcomparisonmetrics.Noassumptionsaremaderegardingthemannerinwhichthemodelscharacterizethedispersion.1.3Thefocusofthisguideisonendresults,thatis,theaccuracyofmodelpredictionsandthediscernmentofwhetherdifferencesseenbetweenmodelsaresignificant,ratherthanoperationaldetailssuchastheeaseofmodelimplementationorthetimerequiredformodelcalculationstobeperformed.1.4Thisguideoffersanorganizedcollectionofinformationoraseriesofoptionsanddoesnotrecommendaspecificcourseofaction.Thisguidecannotreplaceeducationorexperienceandshouldbeusedinconjunctionwithprofessionaljudgment.Notallaspectsofthisguidemaybeapplicableinallcircumstances.Thisguideisnotintendedtorepresentorreplacethestandardofcarebywhichtheadequacyofagivenprofessionalservicemustbejudged,norshoulditbeappliedwithoutconsiderationofaproject''smanyuniqueaspects.Thewordx201C;Standardx201D;inthetitleofthisguidemeansonlythatthedocumenthasbeenapprovedthroughtheASTMconsensusprocess.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,asso......
【中国标准分类号】:A47
【国际标准分类号】:13_040_20
【页数】:17P.;A4
【正文语种】:英语



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