摘要
Experiments on a nonlinear oscillator reveal the same periodic structure as that in one-dimensional unimodal maps and a simple method is found to assign words from a symbolic dynamics of two letters to the periods observed in experiments.This paper gives plentiful patterns of U-sequence,including period-tripling patterns R*RL,RL*RL and RL^(2)*RL.Spectral analysis gives a confirmation of the patterns.
