用神经网络预测模型和灰色预测模型对1996-2000年GDP进行预测(Neural network prediction model and grey prediction model are used to predict GDP in 1996-2000 years)

ELMAN神经网络模型预测精度高于BP神经网络，可以用于非线性时间序列的预测。(The prediction accuracy of ELMAN neural network model is higher than that of BP neural network, and it can be used to predict nonlinear time series.)