An integrated framework of spectral stitching and machine learning deciphers the molecular complexity of coals - Shan-Zhao Feng; Jin-Xi Wu; Xing Fan; Hai-Xu Zou; Jian-Fang Xu; Guligena Pidamaimaiti; Yierxiati Dilixiati; Gao-Zhan Zhang; Xiang Bai; Xian-Yong Wei (Fuel, 2026)