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  • Title: Near-Infrared Spectrum Detection of Wheat Gluten Protein Content Based on a Combined Filtering Method.
    Author: Cai JH.
    Journal: J AOAC Int; 2017 Sep 01; 100(5):1565-1568. PubMed ID: 28425394.
    Abstract:
    To eliminate the random error of the derivative near-IR (NIR) spectrum and to improve model stability and the prediction accuracy of the gluten protein content, a combined method is proposed for pretreatment of the NIR spectrum based on both empirical mode decomposition and the wavelet soft-threshold method. The principle and the steps of the method are introduced and the denoising effect is evaluated. The wheat gluten protein content is calculated based on the denoised spectrum, and the results are compared with those of the nine-point smoothing method and the wavelet soft-threshold method. Experimental results show that the proposed combined method is effective in completing pretreatment of the NIR spectrum, and the proposed method improves the accuracy of detection of wheat gluten protein content from the NIR spectrum.
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