Research Article
The Health Monitoring Method of Concrete Dams Based on Ambient Vibration Testing and Kernel Principle Analysis
Table 1
The comparison of false alarm rate and missing alarm rate of PCA and KPCA method.
| Case | Indicator | Analysis method | PCA | KPCA | False (missing) alarm rate | Accuracy | False (missing) alarm rate | Accuracy |
| Case 2 (undamaged) | Frequency | 11.11% | 88.89% | 2.78% | 97.22% | COMAC | 2.78% | 97.22% | 5.56% | 94.44% |
| Case 3 (damaged) | Frequency | 80.55% | 19.44% | 5.56% | 94.44% | COMAC | 50.00% | 50.00% | 2.78% | 97.22% |
| Case 4 (damaged) | Frequency | 0.00% | 100.00% | 0.00% | 100.00% | COMAC | 11.11% | 88.89% | 0.00% | 100.00% |
|
|