提出分形上的混沌动力系统以及混沌与神经网络相结合的方法，可为水科学问题的研究能提供一些新的思路。
Finally, we suggest that the fractal chaos dynamical system and the mean of combining chaos with neural net provide several new methods in the future studying.
论述混沌与分形的基本特征，重点提出把混沌与分形分析方法引入环境科学中，探索环境现象变化的新途径。
Discusses the chaos and fractal basic characteristic. puts its analysis method into environment science, investigate the new path that environment phenomenon change.
基于混沌和分形理论，分析了描述煤与瓦斯突出动态前兆非线性特征的方法和指标。
Based on chaos and fractal theories, the methods and indices for characterizing the nonlinear patterns of dynamic precursors of coal and gas outburst were analyzed.
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