Robust Fuzzy Control of an Active Magnetic Bearing Subject to Voltage Saturation. - Haiping Du; Nong Zhang; Jin C. Ji; Wei Gao (IEEE Trans. Control. Syst. Technol., 2010)

Two-to-One resonant Hopf bifurcations in a quadratically nonlinear oscillator involving Time Delay. - Jin C. Ji; X. Y. Li; Zhen Luo; Nong Zhang (Int. J. Bifurc. Chaos, 2012)