便携式X射线荧光光谱仪应用条件试验及效果(3)

Keywords:portableXRFanalyzer;applicationconditiontest;measurementofrockpowdersample;silver polymetaliicmine作者简介:钱建平(1953-),男,教授,地球化学专业。

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THESIMULATIONOF SPECTRUM SHIFTINGBASEDONHMMDUALMODEL

HUANGHong quan,FANGFang,GONGDi chen,DINGWei cheng

(SchoolofNuclearTechnologyandAutomation,ChengduUniversityofTechnology,Chengdu 610059,China)

Abstract:Basedonstatisticalcharacteristicsofenergyspectrumandspectrum shiftingfeaturesinspectrometry,theauthorsappliedthedualmodelofHiddenMarkovModelstothesimulationofspectrum shifting.TransientcharacteristicsofenergyspectrumweredescribedandthentransformedintoaparametricmodelbyGaussianMixtureMode.Theconditionsofspectrum shiftinginthemeasurementofen ergyspectrumweresimulatedbystatetransitionofHiddenMarkovModels,andthentheparametersofGaussianmixturemodelwereadjusted.Practicalapplicationshowsthattheseparameterscanbeadjustedflexiblybythismethodtomeetthevariousrequirementsinsimulationofenergyspectrumshifting,andhencethismethodisaparametricsimulationmethodwithgoodperformance.Keywords:Gaussianmixturemode;lHiddenMarkovModels;simulationofspectrum shifting;radiometricsurvey作者简介:黄洪全(1973-),男,博士生,研究方向:核勘查与信息处理,DSP技术。