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【英文标准名称】:StandardPracticeforEvaluatingTestSensitivityforRubberTestMethods
【原文标准名称】:评价橡胶试验方法的试验敏感性的标准操作规程
【标准号】:ASTMD6600-2000(2004)
【标准状态】:现行
【国别】:
【发布日期】:2000
【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】:D11.16
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:absolutetestsensitivity;calibrationmaterial;referencematerial;relativetestsensitivity;signal-to-noiseratio;testsensitivity
【摘要】:Testingisconductedtomaketechnicaldecisionsonmaterials,processes,andproducts.Withthecontinuedgrowthintheavailabletestmethodsforevaluatingscientificandtechnicalproperties,aquantitativeapproachisneededtoselecttestmethodsthathavehigh(orhighest)qualityortechnicalmerit.Theproceduresasdefinedinthispracticemaybeusedforthispurposetomaketestingascosteffectiveaspossible.Oneindexoftestmethodtechnicalmeritandimpliedsensitivityfrequentlyusedinthepasthasbeentestmethodprecision.Theprecisionisusuallyexpressedassomemultipleofthetestmeasurementstandarddeviationforadefinedtestingdomain.Althoughprecisionisarequiredquantityfortestsensitivity,itisanincompletecharacteristic(onlyonehalfofthenecessaryinformation)sinceitdoesnotconsiderthediscriminationpowerfortheFP(orconstituent)beingevaluated.Anyattempttoevaluaterelativetestsensitivityfortwodifferenttestmethodsonthebasisoftestmeasurementstandarddeviationratiosorvarianceratios,whichlackanydiscriminationpowerinformationcontent,constitutesaninvalidquantitativebasisforsensitivity,ortechnicalmeritevaluation.Coefficientofvariationratios(whicharenormalizedtothemean)mayconstituteavalidtestsensitivityevaluationonlyunderthespecialconditionwherethetwotestmethodsundercomparisonaredirectlyproportionalorreciprocallyrelatedtoeachother.Iftherelationshipbetweentwotestmethodsisnonlinearorlinearwithanonzerointercept,thecoefficientofvariationratiosarenotequivalenttothetruetestsensitivityasdefinedinthispractice.SeediscussionofexampleinX1.1.4.Thefigureofmeritdefinedbytestsensitivityanditsvariousclassifications,categories,andtypesasintroducedbythispracticepermitsanauthenticquantitativetestsensitivityevaluation.1.1Thispracticecoverstestingtoevaluatechemicalconstituents,chemicalandphysicalpropertiesofcompoundingmaterials,andcompoundedandcuredrubbers,whichmayfrequentlybeconductedbyoneormoretestmethods.Whenmorethanonetestmethodisavailable,twoquestionsarise:Whichtestmethodhasthebetter(orbest)responsetoordiscriminationfortheunderlyingfundamentalpropertybeingevaluated?andWhichtestmethodhastheleasterror?Thesetwocharacteristicscollectivelydetermineonetypeoftechnicalmeritoftestmethodsthatmaybedesignatedastestsensitivity.1.2Althoughacomprehensiveanddetailedtreatment,asgivenbythispractice,isrequiredforafullappreciationoftestsensitivity,asimplifiedconceptualdefinitionmaybegivenhere.Testsensitivityistheratioofdiscriminationpowerforthefundamentalpropertyevaluatedtothemeasurementerrororuncertainty,expressedasastandarddeviation.Thegreaterthediscriminatingpowerandthelowerthetesterror,thebetteristhetestsensitivity.Borrowingfromtheterminologyinelectronics,thisratiohasfrequentlybeencalledthesignal-to-noiseratio;thesignalcorrespondingtothediscriminationpowerandthenoisecorrespondingtothetestmeasurementerror.Therefore,thispracticedescribeshowtestsensitivity,genericallydefinedasthesignal-to-noiseratio,maybeevaluatedfortestmethodsusedintherubbermanufacturingindustry,whichmeasuretypicalphysicalandchemicalproperties,withexceptionsasnotedin.1.3Thispracticedoesnotaddressthetopicofsensitivityforthresholdlimitsorminimumdetectionlimits(MDL)insuchapplicationsas(1)theeffectofintentionalvariationsofcompoundingmaterialsonmeasuredcompoundpropertiesor(2)theevaluationoflowortraceconstituentlevels.Minimumdetectionlimitsarethesubjectofseparatestandards.Thisstandarddoesnotpurportto......
【中国标准分类号】:G34
【国际标准分类号】:83_040_01
【页数】:16P.;A4
【正文语种】:


【英文标准名称】:Cableways
【原文标准名称】:索道
【标准号】:ASMEB30.19-2000
【标准状态】:作废
【国别】:美国
【发布日期】:2000
【实施或试行日期】:
【发布单位】:美国机械工程师协会(ASME)
【起草单位】:ASME
【标准类型】:()
【标准水平】:()
【中文主题词】:安全;维修;电缆设备;检验;手势信号;悬带;起重机;操作方式;装置;提升装置;桅杆起重机;索道;提升机;千斤顶;吊钩;悬移式起重机;试验
【英文主题词】:
【摘要】:
【中国标准分类号】:J81
【国际标准分类号】:53_020_20
【页数】:39P;A4
【正文语种】:英语