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| K | K-medoids+ | Reference [35]+ | Reference [36]+ | CEMS |
|---|---|---|---|---|
| 20 | 5.39 | 5.52 | 5.64 | 5.35 |
| 21 | 4.48 | 4.74 | 4.78 | 4.36 |
| 22 | 4.57 | 4.63 | 4.68 | 4.5 |
| 23 | 5.13 | 5.09 | 5.21 | 5.05 |
| 24 | 4.95 | 5.06 | 5.03 | 5.03 |
| 25 | 5.21 | 5.26 | 5.16 | 5.31 |
| 26 | 5.35 | 5.19 | 5.22 | 5.18 |
