中国科学院数学与系统科学研究院期刊网
Analysis of Transimission Pattern of COVID-19 Based on EM Algorithm and Epidemiological Data
LI Mingyuan, ZHANG Yunjun, ZHOU Xiaohua
Acta Mathematicae Applicatae Sinica . 2020, (2): 427 -439 .  DOI: 10.12387/C2020033