中文说明：改进的等维新息灰色模型，还有残差数列检验，后验差检验，模型精确好用。
English Description：
The improved grey model of equal dimension and innovation, as well as residual series test and posterior error test, is accurate and easy to use.
Improved grey model of equal dimension innovation
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中文说明：改进的等维新息灰色模型，还有残差数列检验，后验差检验，模型精确好用。
English Description：
The improved grey model of equal dimension and innovation, as well as residual series test and posterior error test, is accurate and easy to use.