Research Article
Preprocessing Approach for Power Transformer Maintenance Data Mining Based on k-Nearest Neighbor Completion and Principal Component Analysis
Table 5
Evolution of imputed values.
| ā | Exact values | I-KNN | I-mean | I-multiple |
| H2 | 80 | 80 | 80,034 | 68,664 | CH4 | 30 | 30 | 30,387 | 27,411 | C2H4 | 23 | 23 | 31,08 | 21,542 | CO | 1210 | 1190 | 1174 | 1490,549 | CO2 | 5870 | 5626 | 9159,467 | 9581,353 | N2 | 64920 | 64920 | 71206,679 | 82476,217 |
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