中文说明：
针对货运量预测问题，建立广义神经网络，对货运量进行预测。同时建立了BP神经网络，通过预测误差进行比较。
English Description：
Aiming at the problem of freight volume prediction, a generalized neural network is established to predict the freight volume. At the same time, BP neural network is established to compare the prediction error