简介：

简介：

简介：InthispaperamethodoftrackreconstructiondevelopedfortheHERA-Bmaintrackingsystemisdiscussed.Themethodbasedonatrackfollowingalgorithmisusedfortrackfindinginthefield-freeareaandforthetrackpropagationthroughtheinhomogeneousmagneticfield.Theperformanceofprogramforsimulatedandrealdataisshown.

简介：WepresentaHerriott-typemultipasslaserabsorptionspectrometerenhancedbyopticalheterodynedetection.Theproposalisdemonstratedbymeasuringthespectraofwatervapormoleculeintheregionfrom12247.6873to12249.6954cm-1.Comparedwithdirectabsorptionspectroscopy,thesignal-to-noiseratioisimprovednearlyonemagnitudeoffactorbycombiningwiththeopticalheterodynespectroscopyandextraweakabsorptionlinesareobserved.Theminimumdetectableabsorptionisestimatedat4.36×10-8cm-1andthemeasuredlineshapedominatedbyDopplerbroadeningcanbepreciselyrecoveredbydirecttransformationofexperimentalopticalheterodynespectralprofile.

简介：

简介：Anonlinearitymeasurementofthecharge-coupleddevice(CCD)arrayspectrometerusingfluxadditionandcomparisonmethodisdescribed.Thelightwithvariouscolorsfromthecolorfullightemittingdiode(LED)lightsourceisappliedtomeasurethenonlinearityofthespectrometeratdifferentwavelengths,respectively.Anhigh-endCCDarrayspectrometeristested.ForcolorfulLEDlightsources,thenonlinearityfactorsoftheCCDarrayspectrometer(absolutevalue)areasfollows:k<0.8%forwhitelight,k<1.1%forredlight,k<2.2%forgreenlightandk<4.7%forbluelight.Byusingthosequasi-monochromaticlightsources,itisshownthatthenonlinearitydependsonthewavelength.Itisimportanttobewarinessaboutthespectralnonlinearityandrelateduncertaintyevaluationwhenthenarrow-bandlightsourceistested.

简介：ＳＴＵＤＹ　ＯＮ　ＴＨＥ　ＲＥＬＡＴＩＯＮＳＨＩＰ　ＢＥＴＷＥＥＮ　ＭＥＬＴＩＮＧ　ＰＯＩＮＴ　ＡＮＤ　ＡＣＩＤ　ＤＥＮＡＴＵＲＩＮＧ　ＡＣＩＤＩＴＹ　ＯＦ　ＤＮＡ　ＢＹ　ＵＬＴＲＡＶＩＯＬＥＴ　ＳＰＥＣＴＲＯＭＥＴＥＲＳＴＵＤＹＯＮＴＨＥＲＥＬＡＴ...

简介：

简介：一根双横梁在红外线附近的分光计被开发在紧张补偿水吸收和仪器的飘移。分光计可以被用于单个、双的横梁大小，并且二个操作模式被比较。结果证明双横梁技术在单个横梁测量消除仪器的飘移，因此，系统的稳定性增加超过20%。水吸收上的双横梁系统的赔偿被胖内容的测量在牛奶验证。结果证明光谱数据比传统的单个横梁模式基于两倍横梁模式得到更好的刻度模型和更低的预言错误。CLC数字TH744.1-TN219-O433.1这个工作被中国(号码2004BA706B12)和天津(No.023800411)的自然科学关键基础的第10五个年计划支持。

简介：Anewtime-resolvedshifteddualtransmissiongratingspectrometer(SDTGS)isdesignedandfabricatedinthiswork.ThisSDTGSusesanewshifteddualtransmissiongrating(SDTG)asitsdispersivecomponent,whichhastwosubtransmissiongratingswithdifferentlinedensities,of2000lines/mmand5000lines/mm.TheaxesofthetwosubtransmissiongratingsinSDTGarehorizontallyandverticallyshiftedacertaindistancetomeasureabroadrangeof0.1–5keVtime-resolvedX-rayspectra.TheSDTGhasbeencalibratedwithasoftX-raybeamofthesynchrotronradiationfacilityanditsdiffractionefficiencyisalsomeasured.ThedesignedSDTGScantakefulluseofthespaceonarecordpanelandimprovetheprecisionformeasuringspatialandtemporalspectrumsimultaneously.ItwillbeapromisingapplicationforaccuratediagnosisofthesoftX-rayspectrumininertialconfinementfusion.

简介：Hyper-spectralimagingspectrometerhashighspatialandspectralresolution.Itsradiometriccalibrationneedstheknowledgeofthesourcesusedwithhighspectralresolution.Inordertosatisfytherequirementofsource,anon-orbitradiometriccalibrationmethodisdesignedinthispaper.Thischainisbasedonthespectralinversionaccuracyofthecalibrationlightsource.Wecompilethegeneticalgorithmprogresswhichisusedtooptimizethechanneldesignofthetransferradiometerandconsiderthedegradationofthehalogenlamp,thusrealizingthehighaccuracyinversionofspectralcurveinthewholeworkingtime.Theexperimentalresultsshowtheaveragerootmeansquarederroris0.396%,themaximumrootmeansquarederroris0.448%,andtherelativeerrorsatallwavelengthsarewithin1%inthespectralrangefrom500nmto900nmduring100hoperatingtime.Thedesignlaysafoundationforthehighaccuracycalibrationofimagingspectrometer.

简介：摘要：采用电感耦合等离子体光谱仪测定碳钢中铝含量，并对影响结果的各个因素进行分析，并依据JJF 1059.1-2012《测量不确定度评定与表示》，对碳钢中铝含量测定结果的不确定度进行评定。

简介：摘要：采用电感耦合等离子体光谱仪测定不锈钢中钼含量，并对影响结果的各个因素进行分析，并依据JJF 1059.1-2012《测量不确定度评定与表示》，对不锈钢中钼含量测定结果的不确定度进行评定。

简介：摘要: 参考《化妆品安全技术规范》、《GB/T 24533-2019 锂离子电池石墨类负极材料》等文献，实验对比了干法、四酸、王水浸提法三种前处理方法对石墨烯及含石墨烯洗发水样品检测结果的影响。