Abstract：To implement calibration transfer between Raman spectrometers, an improved piecewise direct standardization (PDS) is proposed in the present paper. Standard normal variate (SNV) is firstly introduced to reduce the influence of spectral background and intensity corresponding to the master spectrometer and the slave spectrometer; then PDS algorithm is used to eliminate the differences between Raman spectra for a specific sample. Moreover, a new quantitative criterion, called transfer error rate, is proposed to evaluate the performance of calibration model transfer. This improved PDS is applied to Raman spectral analysis of gasoline. The result shows that the proposed algorithm not only needs a small quantity of transfer samples, but also obtains high transfer accuracy and strong model robustness.
Key words：Piecewise direct standardization;Standard normal variate;Raman spectrum;Calibration model transfer
黄承伟，戴连奎*，董学锋 . 结合SNV的分段直接标准化方法在拉曼光谱模型传递中的应用[J]. 光谱学与光谱分析, 2011, 31(05): 1279-1282.
HUANG Cheng-wei，DAI Lian-kui*，DONG Xue-feng . The Application of Piecewise Direct Standardization with SNV in Calibration Transfer of Raman Spectra . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2011, 31(05): 1279-1282.
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