A two-layer nested heterogeneous ensemble learning predictive method for COVID-19 mortality. - Shaoze Cui; Yanzhang Wang; Dujuan Wang; Qian Sai; Ziheng Huang; T. C. E. Cheng (Appl. Soft Comput., 2021)

Cross-border credit networks, banking risk contagion and suppression effects. - Heng Zhao; Yanxi Li; Qian Sai; Yi Ren (Soc. Networks, 2023)