André Strahl, Heiko Graichen, Holger Haas, Robert Hube, Carsten Perka, Tim Rolvien, Jan Hubert
Evaluation of the patient-accompanying app "alley ortho companion" for patients with osteoarthritis of the knee and hip: study protocol for a randomized controlled multi-center trial
Trials
simple transparent example nonautonomous flow system hyperbolic strange attractor suggested system constructed basis two coupled van der pol oscillators characteristic frequencies differ twice parameters controlling generation oscillators undergo slow periodic counterphase variation time terms stroboscopic poincar sections respective 4d mapping hyperbolic strange attractor smalewilliams type qualitative reasoning quantitative data numerical computations presented discussed eg lyapunov exponents parameter dependencies special test hyperbolicity based analysis distributions angles stable unstable subspaces chaotic trajectory performed