中国物理B ›› 2013, Vol. 22 ›› Issue (5): 50502-050502.doi: 10.1088/1674-1056/22/5/050502

• GENERAL • 上一篇    下一篇

New predication of chaotic time series based on local Lyapunov exponent

张勇   

  1. Department of Mathematics and Computer, Wuhan Polytechnic University, Wuhan 430024, China
  • 收稿日期:2012-06-11 修回日期:2012-09-17 出版日期:2013-04-01 发布日期:2013-04-01
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 61201452).

New predication of chaotic time series based on local Lyapunov exponent

Zhang Yong (张勇)   

  1. Department of Mathematics and Computer, Wuhan Polytechnic University, Wuhan 430024, China
  • Received:2012-06-11 Revised:2012-09-17 Online:2013-04-01 Published:2013-04-01
  • Contact: Zhang Yong E-mail:ballack-13@163.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 61201452).

摘要: A new method of predicting chaotic time series is presented based on local Lyapunov exponent, by quantitatively measuring the exponential rate of separation or attraction of two infinitely close trajectories in state space. After reconstructing state space from one-dimensional chaotic time series, neighboring multiple-state vectors of the predicting point are selected to deduce the prediction formula using the definition of local Lyapunov exponent. Numerical simulations are carried out to test its effectiveness and verify its higher precision than two older methods. Effects of number of referential state vectors and added noise on forecasting accuracy are also studied numerically.

关键词: chaotic time series, prediction of chaotic time series, local Lyapunov exponent, least squares method

Abstract: A new method of predicting chaotic time series is presented based on local Lyapunov exponent, by quantitatively measuring the exponential rate of separation or attraction of two infinitely close trajectories in state space. After reconstructing state space from one-dimensional chaotic time series, neighboring multiple-state vectors of the predicting point are selected to deduce the prediction formula using the definition of local Lyapunov exponent. Numerical simulations are carried out to test its effectiveness and verify its higher precision than two older methods. Effects of number of referential state vectors and added noise on forecasting accuracy are also studied numerically.

Key words: chaotic time series, prediction of chaotic time series, local Lyapunov exponent, least squares method

中图分类号:  (Low-dimensional chaos)

  • 05.45.Ac