5Zhang Wei, Sun Menghui, Wang Yiqun. Research of automatic gauge control model in hydraulic screw-down system of strip mill[R]. Hangzhou in China: Proceedings of the Sixth International Conference on Fluid Power Transmission and Control,2005, 4:717 - 721
6Roman Gorecki, Jan Jeckielek. Simplifying controller for process control system with large dead time[J]. ISA Transaction, 1999,38:37- 42.