以人工神经网络的前馈型网络为基础结构，基于反向传播算法进行学习和训练来拟和证券价格指数的运动趋势。

In this model, back propagation algorithm based on forward networks was conducted to learn information of historical data and to train the network weights.

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以建构主义学习理论为基础，提出了一种基于建构主义的网络教学平台，并重点介绍了它的设计原理和方法。

Based on the theory of constructivism, this paper puts forword a kind of constructivism-based network instruction platform and introduces its designing principles and methods.

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然后在以学习活动为中心的教学设计理论和PBL 的基础上，提出PBL网络课程的总体设计过程和主要设计内容。

Then we expound the gross designing course and main contents of PBL Web-based course based on PBL and instructional design centered on learning activity.

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