ISO 12857-1-1997 光学和光学仪器.大地测绘仪.测量准确度的现场测量方法.第1部分:水准仪
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【英文标准名称】:Opticsandopticalinstruments-Geodeticinstruments-Fieldproceduresfordeterminingaccuracy-Part1:Levels
【原文标准名称】:光学和光学仪器.大地测绘仪.测量准确度的现场测量方法.第1部分:水准仪
【标准号】:ISO12857-1-1997
【标准状态】:作废
【国别】:国际
【发布日期】:1997-08
【实施或试行日期】:
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO/TC172
【标准类型】:()
【标准水平】:()
【中文主题词】:定义;光学;试验;测绘;测量精度;光学仪器;现场试验;光学测量;光学设备;大地测量学
【英文主题词】:measuringaccuracy;opticalmeasurement;opticalinstruments;testing;surveying;optics;geodesy;opticalequipment;fieldtesting;definitions
【摘要】:
【中国标准分类号】:N30
【国际标准分类号】:17_180_30
【页数】:8P;A4
【正文语种】:英语
【英文标准名称】:TestMethodforAlternating-CurrentMagneticPropertiesofMaterialsatLowInductionsUsingtheWattmeter-Varmeter-Ammeter-VoltmeterMethodand25-cm(250-mm)EpsteinFrame
【原文标准名称】:在低感应条件下用万用表法和25厘米艾普斯亭(Epstein)框测定材料的交流磁特性的试验方法
【标准号】:ASTMA889/A889M-1993
【标准状态】:作废
【国别】:美国
【发布日期】:1993
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:磁性材料;磁测量;试验;交流电流
【英文主题词】:magneticmeasurement;testing;alternatingcurrent;magneticmaterials
【摘要】:
【中国标准分类号】:A55
【国际标准分类号】:29_040_10
【页数】:5P;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodforCrimpFrequencyofmanufacturedStapleFibers
【原文标准名称】:纺纱用人造短纤维卷曲率的标准试验方法
【标准号】:ASTMD3937-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【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】:D13.58
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:化学纤维;试验;纺织纤维;纺织材料
【英文主题词】:crimp;textilefibers
【摘要】:Thistestmethodforthedeterminationofcrimpfrequencyofmanufacturedstaplefibersmaybeusedfortheacceptancetestingofcommercialshipmentsbutcautionisadvisedsincebetween-laboratoryprecisionisknowntobepoor.Comparativetestsconductedasdirectedin5.1.1maybeadvisable.5.1.1Iftherearedifferencesorpracticalsignificancebetweenreportedtestresultsfortwolaboratories(ormore),comparativetestsshouldbeperformedtodetermineifthereisastatisticalbiasbetweenthem,usingcompetentstatisticalassistance.Asaminimum,testsamplesthatareashomogeneousaspossible,drawnfromthematerialfromwhichthedisparatetestresultswereobtained,andrandomlyassignedinequalnumberstoeachlaboratoryfortesting.Thetestresultsfromthetwolaboratoriesshouldbecomparedusingastatisticaltestforunpaireddata,ataprobabilitylevelchosenpriortotestingseries.Ifabiasisfound,eitheritscausemustbefoundandcorrected,orfuturetestresultsforthatmaterialmustbeadjustedinconsiderationoftheknownbias.Thistestmethodisusedforqualitycontrol.Itisanunsophisticatedprocedurewhichisparticularlyusefulindetectingmajordifferencesincrimpfrequency.Thistestmethodisnotconsideredtobeusefulinresearchanddevelopmentwhereminordifferencesormorecompletecrimpcharacterization,includingamplitudeandindex,maybenecessary.Crimpinfiberaffectsthecardingandsubsequentprocessingofthefiberintoeitherayarnoranonwovenfabric.Staplecrimpinfiberwillalsoaffectthebulkoropennessofayarnandthereforethehandandvisualappearanceofthefinishedtextileproduct.1.1Thistestmethodcoversthedeterminationofthecrimpfrequencyofmanufacturedstaplefibers.Thistestmethodisapplicabletoallcrimpedprovidedthecrimpcanbeviewedtwo-dimensionallyasasine-waveconfiguration.1.1.1Itshouldberecognizedthatyarnmanufacturingprocessesortreatmentstomanufacturedyarnscaninfluenceormodifycrimpinfiber.Hence,thevalueforcrimpoffiberstakenfromspunyarnsmaybedifferentthanthatofthesamefiberpriortothemanufacturingortreatmentprocesses.1.2Threeoptionsareprovidedforpreparationofthespecimens.OptionOne(preferred)usessinglefibersforthespecimenswithalowmagnificationavailable,OptionTwo(optionalforstapleortowsamples)usesfiberchipsasthespecimens,andOptionThreeusesprojectedimagesofsinglefibers.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Theinch-poundunitsinparenthesesareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:W50
【国际标准分类号】:59_060_20
【页数】:4P.;A4
【正文语种】:
