Ensemble empirical mode decomposition based fluorescence spectral noise reduction for low concentration PAHs

(整期优先)网络出版时间:2017-06-16
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Anewnoisereductionmethodbasedonensembleempiricalmodedecomposition(EEMD)isproposedtoimprovethedetectioneffectforfluorescencespectra.Polycyclicaromatichydrocarbons(PAHs)pollutants,asakindofimportantcurrentenvironmentalpollutionsource,arehighlyoncogenic.Usingthefluorescencespectroscopymethod,thePAHspollutantscanbedetected.However,instrumentwillproducenoiseintheexperiment.Weakfluorescentsignalscanbeaffectedbynoise,soweproposeawaytodenoiseandimprovethedetectioneffect.Firstly,weusefluorescencespectrometertodetectPAHstoobtainfluorescencespectra.Subsequently,noisesarereducedbyEEMDalgorithm.Finally,theexperimentresultsshowtheproposedmethodisfeasible.