Longquan Yong received his B.S.degree in Applied Mathematics from Yantai University, China, in 2002, his M.S. degree in Applied Mathematics from Xidian University, China, in 2005, and his Ph.D. degree in Applied Mathematics from Xidian University, China, in 2014. He has been working in Shaanxi University of Technology since 2005. His current research interests include optimization theory and methods, swarm intelligent computation, and engineering optimization.