Spectroscopy and Spectral Analysis, Volume. 35, Issue 6, 1624(2015)
Outlier Detection of Time Series Three-Dimensional Fluorescence Spectroscopy
The qualitative and quantitative analysis are often interfered by the outliers in time series three-dimensional fluorescence spectroscopy. In this work, an efficient outlier detection method is proposed by taking advantage of the characteristics in time dimension and the spectral dimension. Firstly, the wavelength points that are mostly the outliers are extracted by the variance in time dimension. Secondly, by the analysis of the existence styles of outliers and similarity score of any two samples, the cumulative similarity is introduced in spectral dimension. At last, fluorescence intensity at each wavelength of all samples is modified by the correction matrix in time dimension and the outlier detection is completed according the to cumulative similarity scores. The application of the correction matrix in time dimension not only improves the validity of the method but also reduces the computation by the choice of characteristics region in correction matrix. Numerical experiments show that the outliers can still be detected by the 50 percent of all points in spectral dimension.
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YU Shao-hui, ZHANG Yu-jun, ZHAO Nan-jing. Outlier Detection of Time Series Three-Dimensional Fluorescence Spectroscopy[J]. Spectroscopy and Spectral Analysis, 2015, 35(6): 1624
Received: Mar. 19, 2014
Accepted: --
Published Online: Jun. 11, 2015
The Author Email: Shao-hui YU (shaohuiy@hftc.edu.cn)