Locating a regular needle in a chaotic haystack, and conversely, using   Lyapunov Weighted Dynamics
  In many physical systems, dynamics is ruled by structures of atypical chaoticity. These structures may occupy a very small volume in phase space and can thus be very difficult to locate numerically. In this article, we review an algorithm, the Lyapunov Weighted Dynamics, which efficiently reveals trajectories of atypical chaoticity. 
Tanguy Laffargue and Julien Tailleur
cond-mat.stat-mech nlin.CD nlin.PS