Corresponding author.Yeqing Liu was born in 1979. She is studying for her doctor's degree in Department of Mathematical Sciences in Xidian University. Her research interests include optimization algorithm and machine learning. E-mail: xiangshui15 @ 163.com Sanyang Liu was born in 1959. He is a professor and a tutor of Ph.D. in Xidian University. His current research interests include optimization theory and algorithm, machine learning and pattern recognition. E-mall: liusanyang@ 126.com Mingtao Gu was born in 1980 and he is an engineer. His main research interest includes machine learning. E-mail: fzzoo@sina.com