Table 6 Statistics of the predicted values and relative errors for single models.

From: Prediction of the corrosion rates of subsea pipelines via KPCA

Sample number

Real value

BP

LSSVM

SVM

RF

Projected value/

(mm.a−1)

Relative error/

(%)

Projected value/

(mm.a−1)

Relative

error/

(%)

Projected value/

(mm.a−1)

Relative error/

(%)

Projected value/

(mm.a−1)

Relative error/

(%)

1

2.6183

2.8311

8.13

2.7931

6.68

2.9084

11.08

2.4635

5.91

2

2.5523

2.7746

8.71

2.6783

4.94

2.6423

3.53

3.1467

23.29

3

2.6956

2.3825

11.62

2.9007

7.61

3.2736

21.44

2.9323

8.78

4

2.6285

3.1707

20.63

2.7922

6.23

3.1103

18.33

2.8319

7.74

5

2.6872

2.9384

9.35

2.5053

6.77

3.0450

13.32

2.9478

9.70

6

2.6945

2.9928

11.07

2.5115

6.79

1.8556

31.13

2.3388

13.20

7

2.7175

2.4148

11.14

2.5144

7.47

2.5520

6.09

2.9805

9.68

8

2.6074

2.5069

3.85

2.89251

10.93

2.4578

5.74

2.2151

15.05

9

2.6924

2.3049

14.39

2.9028

7.81

3.2441

20.49

2.9528

9.67

10

2.6647

3.1093

16.68

2.8296

6.19

3.0036

12.72

2.8341

6.36

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