Liu Sanyang was born in 1959. tie is a promssor and doctoral supervisor in Department of Mathematical Sciences in Xidian University. He is the author or coauthor of more than 300 scientific papers. His main research areas include optimization methods with applications, network optimization, data mining and support vector machine. E-mail: liusanyang529@ 126.com Liang Jinjin was born in 1983. She received her B. E. degree in applied mathematics from Henan Normal University in 2004. She is now studying for her M. E. and Ph.D. degrees in applied mathematics in Xidian University. Her main research areas are optimization methods with applications, data mining and support vector machine. Wu De was born in 1979. He received his M. E. degree in School of Computer Science and Technology from Xidian University in 2005. He is now studying for his Ph.D. degree in School of Computer Science and Technology in Xidian University. His main research areas are software engineering, network security, network optimization and data mining. Duan Wei was born in 1983. She received her B. E. degree in applied mathematics from Henan Normal University in 2005. She is now studying for her M. E. and Ph. D. degrees in applied mathematics in Xidian University. Her main research areas are optimization methods with applications and distributed wireless sensor network.