非线性物理：混沌物理 4.5 4.0 Xn3.5 3.0 2.5 0 2000 4000 6000 8000 10000 Iteration Number FIG.3.Time-series data as the system is switched from no control to control about the fixed point (at n=2360),to control about the period-2 orbit (at n=4800),and back to control around the fixed point (at n=7100). 非线性物理：混沌物理