6Huang N E, Shen Zheng, Long S R. The empirical mode decompo-sition and the Hilbert spectrum for nonlinear and non-stationary time series analysis [ J ]. Proel R. Soc. Lond, 1998, A:903 - 995.
7Kohonen T. Self-organizing maps [ M ]. Berlin:Springer, 1995.
8Juha Vesanto, Johan Himberg, Esa Alhoniemi, et al. Self-organizing map in MATLAB : the SOM Toolbox [ C ]. Espoo, Finland : Proceed- ings of the MATLAB DSP Conference, 1999,35 - 40.
9Arai M. Mapping abilities of three layered neural networks.Proceedings of UCNN, Seattle, USA: 1991,419-423.
10Yu Xiaohu. Dynamic learning rate optimization of the back propagation algorithm. IEEE Trans Neural Network.s, 1995,6(3) :669 - 677.
