Table 4 Calculation results related to PDF of surface crack length of the coating (12–48 h)

From: Lifetime prediction of epoxy coating using convolutional neural networks and post processing image recognition methods

Time/h

S1

S2

x1

x2

|x2−x1|

12 h

0.54

0.46

2.649

3.692

1.043

24 h

0.58

0.42

3.054

3.851

0.797

48 h

0.59

0.41

2.958

3.583

0.625

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