[1] Jiangxi Univ Sci & Technol, Sch Sci, Ganzhou 341000, Peoples R China
[2] Beijing Univ Posts & Telecommun, State Key Lab Informat Photon & Opt Commun, Beijing 100876, Peoples R China
[3] Beijing Univ Posts & Telecommun, Sch Sci, Beijing 100876, Peoples R China
[4] Huazhong Univ Sci & Technol, Sch Math & Sci, Wuhan 430074, Peoples R China
[5] Univ Berlin, Inst Phys, D-12489 Berlin, Germany
[6] Potsdam Inst Climate Impact Res, D-14415 Potsdam, Germany
[7] Univ Aberdeen, Inst Complex Syst & Math Biol, Aberdeen AB24 3FX, Scotland