Figure 1

Trajectories: (a) errors; (b) the unknown parameter estimates of the Cai system; (c) the unknown parameter estimates of the Rossler system. \(\left( {p_{1} = q_{1} = 2} \right)\).
Trajectories: (a) errors; (b) the unknown parameter estimates of the Cai system; (c) the unknown parameter estimates of the Rossler system. \(\left( {p_{1} = q_{1} = 2} \right)\).