1. School of Mathematics and Statistics, Central South University, Changsha 410075, China;
2. School of Statistics, Jiangxi University of Finance and Economics, Nanchang 330013, China
Online:2021-12-30
Published:2021-12-22
Contact:
Jin Wei(1982−),PhD;E−mail:jinweipei82@163.com
Supported by:
This work was supported by the NNSF of China (12061034,12071484), NSF of Jiangxi (20192ACBL21007, GJJ190273) and CPSF(2019T120563)