TY - JOUR AU - Haijian Chen AU - Yonghui Dai AU - Heyu Gao AU - Dongmei Han AU - Shan Li TI - Classification and Analysis of MOOCs Learner’s State: The Study of Hidden Markov Model JO - Computer Science and Information Systems PY - 2019 VL - 16 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/CSIS_2019_16_3_a9/ ID - CSIS_2019_16_3_a9 ER -