Characterization and Identification of Coal and Carbonaceous Shale Using Visible and Near-Infrared Reflectance Spectroscopy

Table 4

Identification accuracies of categories of all bituminite and carbonaceous shale samples collected from Malan coal mine area in Shanxi province of China by the prediction models.

Model	150 training samples	50 prediction samples	50 block samples
PCA-SVM (c = 2^1.5, γ = 2^−2)	92%	80%	76%
GRB-KPCA (σ = 63)-SVM (c = 2^4, γ = 2^0)	100%	94%	92%