Kangkang Zhang received the M.Sc. degree in control theory and control engineering from Northeastern University, Shenyang, China in 2014, and PH.D. degree in control theory and control engineering from Nanjing University of Aeronautics and Astronautics (NUAA), Nanjing, China in 2018. He was a visiting Ph.D. student with the University of Kent, United Kingdom in 2017. Since March 2019, he joined KIOS Research and Innovation Center of Excellence in Cyprus as a postdoctoral research fellow. His research interests cover fault diagnosis and fault-tolerant control, sliding mode observer and control, interval observer and adaptive estimation and their applications in high-speed trains.