就灰色预测而言，如果原始数据列较长，对原始数据进行平滑处理所得预测模型精度较高，而对原始数据进行取自然对数的处理所得模型预测精度较低；

For gray model, the longer of original datum, the higher precision during smoothing processing of datum and the lower precision during natural logarithm processing of datum, vice versa;

youdao

就灰色预测而言，如果原始数据列较长，对原始数据进行平滑处理所得预测模型精度较高，而对原始数据进行取自然对数的处理所得模型预测精度较低；

For gray model, the longer of original datum, the higher precision during smoothing processing of datum and the lower precision during natural logarithm processing of datum, vice versa;

youdao