[1] Xi An Jiao Tong Univ, Sch Math & Stat, Xian 710049, Shaanxi, Peoples R China
[2] Xian Int Acad Math & Math Technol, Ctr Optimizat Tech & Quantitat Finance, Xian 710049, Shaanxi, Peoples R China
[3] Xi An Jiao Tong Univ, Sch Nucl Sci & Technol, Xian 710049, Shaanxi, Peoples R China