Research Article
Preprocessing Approach for Power Transformer Maintenance Data Mining Based on k-Nearest Neighbor Completion and Principal Component Analysis
Table 2
Simulated missing values of transformer T0001.
| Dates | H2 | CH4 | C2H4 | CO | CO2 | N2 |
| 06/09/1988 | | 30,00 | | | | | 17/10/1989 | | | | 1210,00 | | | 30/07/1990 | 80,0 | | | | | | 16/04/1991 | | | | | | 65300,00 | 10/05/1995 | | | | | | 64920,00 | 31/05/1999 | | | | | 5870,00 | | 10/05/2000 | 89,0 | | 23,00 | | | |
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