Stabilizing near-nonhyperbolic chaotic systems and its potential   applications in neuroscience
  Based on the invariance principle of differential equations a simple, systematic, and rigorous feedback scheme with the variable feedback strength is proposed to stabilize nonlinearly any chaotic systems without any prior analytical knowledge of the systems. Especially the method may be used to control near-nonhyperbolic chaotic systems, which although arising naturally from models in astrophysics to those for neurobiology, all OGY-type methods will fail to stabilize. The technique is successfully used to the famous Hindmarsh-Rose model neuron and the R$\ddot{\textrm{o}}$ssler hyperchaos system. 
Debin Huang