【摘要】 普通ＧＭ（１１）模型因预测值“上漂”现象而不能直接用于公路运输量长期预测。等维灰数递补模型通过缩小灰平面，提高灰平面白色度的方法，很好地解决了这一问题，用这种方法得到的长期预测值也较符合实际。更多还原

【Abstract】 GM (1 1) is directly unfit for long-term prediction because of the updrifting trend of the forecasting value Equidmensional gray model by using compensating figure solves perfectly this problem by way of lessening gray plane and the forecasting value is more realistic than that of the general GM (1 1)更多还原