S. Liu

Robust flatness based control of an electromagnetic linear actuator using adaptive PID controller

Paolo Mercorelli, Kai Lehmann, S. Liu, 2003, 42nd IEEE International Conference on Decision and Control (IEEE Cat. No.03CH37475).

An adaptive Kalman filter for dynamic estimation of harmonic signals

S. Liu, S. Liu, Steven Liu, 1998, 8th International Conference on Harmonics and Quality of Power. Proceedings (Cat. No.98EX227).