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中文摘要：
混沌动力学理论提供了证券市场中股价波动的一种分析方法。为了考察中国证券市场的价格是否存在混沌行为，以1990.12.19到2008.4.24的上海证券市场每天的收盘数据，分析了价格波动的非线性特征，通过重构相空间方法重构了1990年到2008年上证指数时间序列的奇怪吸引子，计算其关联维数，并求出其Lyapunov指数为正，从而确认了上证指数时间序列的混沌行为。神经网络是一个非线性系统，通过学习，可以实现非线性函数逼近，从而能更好地实现股票的走向预测。
英文摘要：
The chaotic dynamics theory has provided an analytic method to stock price volatility in the stock market. To find out whether the price of stock has the chaotic behavior, has analyzed nonlinear character of the stock price, based on the close index of stock, from the 19th of Dec in 1990 to 24th of Apr in 2008,and have reconstructed the strange attractor of the time sequence by the method of recon-structing phase space, have calculated correlated dimension, and have proved that the exponent of Lyapunov is positive, then affirmed that the chaotic behavior does exit in the time sequence of stock. The neural network is a nonlinear system, it can approach the nonlinear function by learning, by using the neural network, can forecast the stock＇s direction of the next day.
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