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. 2015 Apr 10;5:9524. doi: 10.1038/srep09524

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(a) Discrimination rates of KNN model according to different K values in the calibration and prediction sets; (b) prediction results of samples with different categories using PLSDA model; (c) contour plot of parameters optimization by cross-validation based on the calibration set; (d) OSELM model according to different numbers of hidden nodes in the calibration and prediction sets.