Research Article
A Support Vector Machine Model with Hyperparameters Optimised by Mind Evolutionary Algorithm for Assessing Permeability of Rock
Table 1
The statistical description of the input and output parameters.
| Parameters | Categories | Data type | Statistics parameters/value range | Minimum | Maximum | Mean | Standard deviation |
| Confining pressure (MPa) | Input parameter | Numeric | 3 | 35 | 17.90 | 11.04 | Pore pressure (MPa) | Input parameter | Numeric | 0.1 | 1.4 | 0.71 | 0.43 | Moisture saturation (%) | Input parameter | Numeric | 0 | 73.60 | 33.65 | 23.73 | Loading/unloading stage | Input parameter | Nominal | Loading stage and unloading stage | Permeability (10ā17) | Output parameter | Numeric | 0.01 | 272.79 | 64.05 | 67.43 |
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