Ryan Wen Liu received the B.Sc. degree (Hons.) in information and computing science from the Department of Mathematics, Wuhan University of Technology, Wuhan, China, in 2009, and the Ph.D. degree in mathematical imaging from The Chinese University of Hong Kong, Hong Kong, in 2015. He was a Visiting Scholar with the College of Computer Science and Software Engineering, Shenzhen University, Shenzhen, China, and also with the Agency for Science, Technology, and Research (A*STAR), Singapore. He is currently an Associate Professor with the School of Navigation, Wuhan University of Technology. His research interests include computer vision, trajectory data mining, machine learning, and computational navigation sciences. He is an Associate Editor of the International Journal on Semantic Web and Information Systems.