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【英文标准名称】:StandardPracticeforUsingSignificantDigitsinGeotechnicalData
【原文标准名称】:在土工学数据中使用有效数字的标准实施规程
【标准号】:ASTMD6026-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【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】:D18.91
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:电子计算器;土工学;数学计算;约(整)数
【英文主题词】:data;datamanagement;determinationvalue;measurementvalue;recordingdata;roundingnumbers;significantdigits;testresult
【摘要】:Theguidelinespresentedinthispracticeforretainingsignificantdigitsandroundingnumbersmaybeadoptedbytheusingagencyoruser.Generally,theiradoptionshouldbeusedforcalculatingandrecordingdatawhenspecifiedrequirementsarenotincludedinastandard.Theguidelinespresentedhereinshouldnotbeinterpretedasabsoluterulesbutasguidestocalculateandreportobservedortestdatawithoutexaggeratingordegradingtheaccuracyofthevalues.4.2.1Theguidelinespresentedemphasizerecordingdatatoenoughsignificantdigitsornumberofdecimalplacestoallowsensitivityandvariabilityanalysestobeperformed,see3.2.1.1Thispracticeisintendedtopromoteuniformityinrecordingsignificantdigitsformeasuredandcalculatedvaluesinvolvinggeotechnicaldata.Theguidelinespresentedareindustrystandard,andarerepresentativeofthesignificantdigitsthatshouldgenerallyberetained.Theguidelinesdonotconsidermaterialvariation,purposeforobtainingthedata,specialpurposestudies,oranyconsiderationsfortheuser''sobjectives;anditiscommonpracticetoincreaseorreducesignificantdigitsofreporteddatatobecommensuratewiththeseconsiderations.Itisbeyondthescopeofthispracticetoconsidersignificantdigitsusedinanalysismethodsforengineeringdesign..1.1.1Usingsignificantdigitsingeotechnicaldatainvolvestheprocessesofcollecting,calculating,andrecordingeithermeasuredvaluesorcalculatedvalues(results),orboth.1.2Thispracticeacceptsavariationofthetraditionalroundingmethodthatrecognizesthealgorithmcommontomosthand-heldcalculators,see.Thetraditionalroundingmethod(see)isinaccordancewithPracticeE29orIEEE/ASTMSI10.1.3Thispracticeoffersasetofinstructionsforperformingoneormorespecificoperations.Thisdocumentcannotreplaceeducationorexperienceandshouldbeusedinconjunctionwithprofessionaljudgment.Notallaspectsofthispracticemaybeapplicableinallcircumstances.ThisASTMstandardisnotintendedtorepresentorreplacethestandardofcarebywhichtheadequacyofagivenprofessionalservicemustbejudged,norshouldthisdocumentbeappliedwithoutconsiderationofaproject''smanyuniqueaspects.Theword"Standard"inthetitleofthisdocumentmeansonlythatthedocumenthasbeenapprovedthroughtheASTMconsensusprocess.
【中国标准分类号】:A41;P21
【国际标准分类号】:07_020
【页数】:5P.;A4
【正文语种】:


【英文标准名称】:Methodsoftestingplastics-Chemicalproperties-Determinationofashofpolyalkyleneterephthalates
【原文标准名称】:塑料试验方法.化学性能.聚对苯二甲酸乙酯灰分的测定
【标准号】:BS2782-4Method470B-1999
【标准状态】:现行
【国别】:英国
【发布日期】:1999-04-15
【实施或试行日期】:1999-04-15
【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】:对苯二甲酸酯;燃烧试验法;增强的材料;塑料和橡胶技术;塑料;灰分测定;聚对苯二甲酸乙酯;共聚物;质量(物质);化学分析和试验;精密度;试样
【英文主题词】:Ashes;Copolymers;Determination;Determinationofcontent;Filled;Flameresistance;Flameproofmaterials;Glassfibrereinforcements;Glass-fibrereinforced;Glass-fibrereinforcedplastics;Methods;Plastics;Polyalkyleneterephthalate;Polybutyleneterephthalate;Processes;Sampleportions;Testequipment;Testreports;Testing;Testingdevices;Tests
【摘要】:ThispartofISO3451specifiesmethodsfordeterminationoftheashofpoly(ethyleneterephthalate),poly(butyleneterephthalate)andcopolymersofthetwo,bothfilledandunfilled.ThegeneralproceduresgiveninISO3451-1arefollowed.ForunfilledmaterialsmethodAormethodCofISO3451-1:1997isused.Forfilledandglass-fibrereinforcedmaterialsmethodAofISO3451-1:1997isused.Forglass-fibrefilledmaterials,containingflameretardant,antimonytrioxide,and/orother,volatilizableadditives,forinstancepigmentzincsulfide,amodificationisincorporatedtoremovetheseasvolatilebrominecomponent(s).
【中国标准分类号】:G31
【国际标准分类号】:83_080_20
【页数】:12P;A4
【正文语种】:英语