Affiliation: | 1.School of Systems Information Science, Future University Hakodate, 116-2 Kamedanakano-cho, Hakodate, Hokkaido, 041-8655, Japan ;2.School of Computer Science and Technology, Xidian University, Xi’an, 710071, China ;3.Graduate School of Information Science, Nara Institute of Science and Technology, Nara, 630-0192, Japan ;4.School of Computer Science, Shaanxi Normal University, Xi’an, China ; |