${{ \mathcal H }}_{\infty }$ synchronization of chaotic Hopfield networks with time-varying delay: a resilient DOF control approach*

Xin Huang(黄鑫),Youmei Zhou(周幼美),Qingkai Kong(孔庆凯),Jianping Zhou(周建平),Muyun Fang(方木云)

Figure 2. Phase-plane trajectories of unforced response system.