[1] Univ Elect Sci & Technol China, Shenzhen Inst Adv Study, Ind Artificial Intelligence Ctr, Shenzhen 518110, Peoples R China
[2] Southwest Jiaotong Univ, Sch Mech Engn, Chengdu 610031, Peoples R China
[3] TP Link Technol Co Ltd Chengdu, Chengdu 610041, Peoples R China
[4] i4AI Ltd, London WC1N 3AX, England