Predefined-Time Synchronization for Variable-Order Fractional Chaotic Systems via Smooth Control - Liu, Yingxiao; Liu, Chuang; Liu, Haoyu; Wei, Zihan; Tao, Yuxin; Zu, Zhixin; Chen, Liping (2024 China Automation Congress (CAC), China Automation Congress (CAC), 2024, 2024)