一种具有时—频多分辨功能的小波分析（Wavelet Analysis）为更好的研究时间序列问题提供了可能，它能清晰的揭示出隐藏在时间序列中的多种变化周期，充分反映系统在不同时间尺度中的变化趋势，并能对系统未来发展趋势进行定性估计。-Having a time- frequency multi-resolution function of wavelet analysis (Wavelet Analysis) in order to better study time series offers the potential problem, it clearly reveals hidden in a variety of time series variation period, fully reflected in the different systems trends in the time scale and is capable of future trends qualitative estimation system.