Research Article
Prediction of Residual Gas Content during Coal Roadway Tunneling Based on Drilling Cuttings Indices and BA-ELM Algorithm
Table 2
Standardized collected parameters.
| No. | K1 | S | Q |
| 1 | 0.857 | −0.556 | 0.778 | 2 | −0.357 | −0.778 | −0.028 | 3 | −0.143 | −0.778 | 0.089 | 4 | −0.071 | −0.778 | 0.122 | 5 | −0.857 | −0.556 | −0.552 | 6 | −0.929 | −0.556 | −0.944 | 7 | −1.000 | −1.000 | −1.000 | 8 | 0.071 | −0.778 | 0.236 | 9 | −0.214 | −0.778 | 0.064 | 10 | 0.071 | −0.111 | 0.278 | 11 | −0.500 | −0.333 | 0.259 | 12 | 0.929 | −0.333 | 0.693 | 13 | −0.286 | −0.778 | 0.106 | 14 | 0.500 | −0.333 | 0.357 | 15 | −0.929 | −0.778 | −0.231 | 16 | −0.643 | −1.000 | −0.410 | 17 | −0.714 | −0.333 | 0.085 | 18 | 0.214 | −0.333 | 0.616 | 19 | 0.571 | 1.000 | 1.000 | 20 | 1.000 | −0.111 | 0.804 |
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