A Long-term forecasting Model Based on Grey Feed-Back Modification

The traditional grey model has been widely used in various forecasting systems. However, it is reported that the accuracy of the model is not satisfactory and it is not suitable for long-term forecasting problems. On the basis of this traditional model, this paper introduces a new grey feed-back modification model, LGM(1.1), for long-term forecasting. Using this model, the trial forecasting precision of the grain production in Hebei province has been improved