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.

CaseIndicatorAnalysis method
PCAKPCA
False (missing) alarm rateAccuracyFalse (missing) alarm rateAccuracy

Case  2 (undamaged)Frequency11.11%88.89%2.78%97.22%
COMAC2.78%97.22%5.56%94.44%

Case  3 (damaged)Frequency80.55%19.44%5.56%94.44%
COMAC50.00%50.00%2.78%97.22%

Case  4 (damaged)Frequency0.00%100.00%0.00%100.00%
COMAC11.11%88.89%0.00%100.00%