时间

真实值

GM预测值

相对误差

真实值

改进GM预测值

相对误差

2017.3

10.437

10.437

0.00%

10.437

10.629

−1.84%

2017.4

11.67

11.797

−1.09%

11.67

11.454

1.85%

2017.5

12.311

12.046

2.15%

12.311

12.020

2.36%

2017.6

12.855

12.301

4.31%

12.855

12.407

3.49%

2017.7

13.067

12.561

3.87%

13.067

12.681

2.95%

2017.8

13.192

12.827

2.77%

13.192

12.898

2.23%

2017.9

12.824

13.098

−2.13%

12.824

13.102

−2.17%

2017.1

12.693

13.375

−5.37%

12.693

13.323

−4.96%

2017.11

12.885

13.657

−5.99%

12.885

13.580

−5.39%

2017.12

13.357

13.946

−4.41%

13.357

13.879

−3.91%

2018.1

13.856

14.241

−2.78%

13.856

14.217

−2.60%

2018.2

14.42

14.542

−0.85%

14.42

14.575

−1.07%

2018.3

14.981

14.849

0.88%

14.981

14.923

0.39%

2018.4

15.59

15.163

2.74%

15.59

15.221

2.36%

2018.5

16.049

15.484

3.52%

16.049

15.415

3.95%

皮尔逊系数

0.94968

0.956995