Consequently, PC1 score is an effective parameter to the coal classifi- cation and THz technique should be a promising selection as a supplementary tool for the detection and classification of anthracite and bituminous coals.
Consequently,PC1 score is an effective parameter to the coal classifi-cation and THz technique should be a promising selection as asupplementary tool for the detection and classification ofanthracite and bituminous coals.