Research Article
New Role of Thermal Mapping in Winter Maintenance with Principal Components Analysis
Table 2
PCA statistical indicators for the UK route.
| | Number of principal components (PC) used | Percentage of explained variance (with 1st PC) | Outliers detected (number of data points) |
| 4 thermal fingerprints (−9°C to +7°C) | 2 | 98 | 170 |
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