Lei Wang received the B.S. degree in mathematics from Qufu Normal University, Qufu, China, in 2003, the M.S. degree in mathematics and the Ph.D. degree in control science and engineering from Beijing University of Technology, Beijing, China in 2006 and 2019, respectively. From 2006 to 2015, he worked as a Lecturer with Binzhou University, Shan Dong, China. Since 2019, he joined Beijing Information Science and Technology University, where he is currently an associate professor. His current research interests include computational intelligence, structure design and optimization of neural networks, modeling and optimal control for wastewater treatment process.