灰色系统理论是一种研究少数据、贫信息、不确定性问题的新方法，该代码为基于灰色神经网络的预测算法，例子为冰箱市场的订单需求预测。(Grey system theory is a new method to study less data, poor information and uncertainty. It is a prediction algorithm based on grey neural network, and an example is the order demand prediction of fridge market.)