Table 1 Statistics of real and synthetic data
From: Advancing LightGBM with data augmentation for predicting the residual strength of corroded pipelines
Parameter | Symbol | Unit | Data type | Min | Max | Mean | Std |
|---|---|---|---|---|---|---|---|
Pipe diameter | D | mm | Real | 41.92 | 2286.00 | 812.74 | 350.14 |
TVAE | 63.74 | 2286.00 | 789.10 | 341.82 | |||
CopulaGAN | 41.92 | 2286.00 | 828.90 | 345.57 | |||
CTGAN | 41.92 | 2286.00 | 833.32 | 340.22 | |||
Wall thickness | t | mm | Real | 2.73 | 25.40 | 14.74 | 6.03 |
TVAE | 2.73 | 23.41 | 14.61 | 6.07 | |||
CopulaGAN | 2.73 | 25.40 | 14.95 | 5.88 | |||
CTGAN | 2.73 | 23.77 | 14.58 | 6.07 | |||
Yield strength | \({\sigma }_{y}\) | MPa | Real | 262.00 | 802.00 | 472.71 | 83.70 |
TVAE | 262.00 | 802.00 | 470.86 | 78.48 | |||
CopulaGAN | 262.00 | 802.00 | 475.29 | 82.27 | |||
CTGAN | 262.00 | 802.00 | 474.85 | 82.71 | |||
Ultimate tensile strength | \({\sigma }_{u}\) | MPa | Real | 392.00 | 891.00 | 620.48 | 93.30 |
TVAE | 392.00 | 891.00 | 618.32 | 88.29 | |||
CopulaGAN | 392.00 | 891.00 | 623.36 | 91.64 | |||
CTGAN | 392.00 | 891.00 | 622.80 | 92.17 | |||
Elastic modulus | E | MPa | Real | 200,000.00 | 210,700.00 | 206,376.21 | 2242.59 |
TVAE | 200,000.00 | 210,700.00 | 206,348.61 | 2237.49 | |||
CopulaGAN | 200,000.00 | 210,700.00 | 206,396.78 | 2193.24 | |||
CTGAN | 200,000.00 | 210,700.00 | 206,440.15 | 2198.28 | |||
Defect depth | d | mm | Real | 0.00 | 15.41 | 5.61 | 3.06 |
TVAE | 0.00 | 15.41 | 5.29 | 2.69 | |||
CopulaGAN | 0.86 | 15.41 | 4.80 | 2.68 | |||
CTGAN | 0.00 | 15.41 | 6.06 | 3.31 | |||
Defect length | l | mm | Real | 0.00 | 5000.00 | 486.81 | 795.95 |
TVAE | 0.00 | 5000.00 | 582.38 | 813.23 | |||
CopulaGAN | 18.36 | 5000.00 | 400.17 | 635.95 | |||
CTGAN | 0.00 | 5000.00 | 360.64 | 579.90 | |||
Defect width | w | mm | Real | 0.00 | 679.80 | 124.31 | 67.75 |
TVAE | 0.66 | 679.80 | 120.61 | 66.53 | |||
CopulaGAN | 0.00 | 491.58 | 122.08 | 62.74 | |||
CTGAN | 4.53 | 609.58 | 127.27 | 64.12 | |||
Residual strength | Pb | MPa | Real | 1.60 | 57.33 | 18.11 | 7.17 |
TVAE | 1.99 | 46.16 | 18.44 | 6.40 | |||
CopulaGAN | 1.90 | 55.49 | 19.52 | 6.87 | |||
CTGAN | 1.55 | 52.53 | 17.73 | 6.76 |
