年份

实际值

灰色关联-GRU

灰色关联-LSTM

GRU

SVM

2015

28,555.57

34,505.33

37,055.53

35,939.83

22,690.21

2016

21,896.19

31,654.98

34,308.99

33,077.83

12,605.37

2017

23,409.24

26,349.53

27,741.95

27,340.24

12,269.44

2018

25,315.35

28,237.66

29,821.95

29,353.25

12,092.86

MSE

0.046822

0.084069

0.066934

0.132926

MAE

0.438129

0.514545

0.485929

0.593015