Back propagation neural network (BPN) has non-linear forecast ability by learning the pattern of training data, forecasting trend of testing data by the pattern of original training data.

• 倒传递类神经网路具非线性预测功能，藉由输入训练资料学习记忆资料特徵，并依据资料特徵对测试资料产生预测值，达到资料趋势走向之预测。