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Table 4 Comparison of the effect of single-item model and the combined model

From: Research of combination forecasting model based on improved analytic hierarchy process

Periods

19

20

21

RMSE

Average

SVR

Residual/mm

− 0.039

0.026

0.097

± 0.062

 

DR/%

6.86

7.27

7.57

 

7.23

RR/%

4.38

6.62

8.53

 

6.51

GM (1,1)

Residual/mm

− 0.134

− 0.125

− 0.118

± 0.126

 

DR/%

11.71

12.07

12.43

 

12.07

RR/%

1.25

1.37

1.52

 

1.38

ARIMA

Residual/mm

0.03

0.046

0.052

± 0.044

 

DR/%

3.95

4.62

5.02

 

4.53

RR/%

0.21

0.38

0.44

 

0.34

Combination model

Residual/mm

− 0.019

0.012

0.039

± 0.026

 

DR/%

2.3

2.35

2.93

 

2.53

RR/%

1.74

2.57

3.24

 

2.51