我们采用灰色预测方法与平均增长量外推法相结合，建立了一种新型的预测模型——灰色组合预测模型。
We use gray dopesting method and averagely ascending quantity outside pushing method, set up a new dopesting model-gray prefab dopesting model.
对预测结果的分析表明，多点外推法不仅减少了平均误差，也使最大误差降低，能有效提高预测精度。
Practical results show that the proposed method lowers both average error and maximum error and improves forecasting precision.
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