(color online) The same as Fig. 2, with trajectories produced by numerical simulations of Eq. (11) using parameters reconstructed in Fig. 5(a). (a) T = 10.42 s, (b) 5.38 s, (c) 3.27 s, and (d) 2.60 s (the same as these in Figs. 2(a)–2(d), respectively). The four pairs of experimental (Fig. 2) and numerical (Fig. 6) trajectories are rather similar to their periodicity, chaoticity and the trajectory structures, though all four trajectories in Fig. 6 are reproduced by Eq. (11) with parameters reconstructed with an experimental data set collected at a single fixed period T = 10.42 s.