[1] Univ Adelaide, Sch Math Sci, Adelaide, SA 5005, Australia
[2] Univ Calgary, Haskayne Sch Business, Calgary, AB, Canada
[3] Hong Kong Polytech Univ, Dept Appl Math, Kowloon, Hong Kong, Peoples R China
[4] Tianjin Polytech Univ, Sch Sci, Dept Math, Tianjin 300160, Peoples R China
[5] Chinese Acad Sci, Acad Math & Syst Sci, Key Lab Syst & Control, Beijing 100190, Peoples R China