Application of Blind Source Separation Algorithms and Ambient Vibration Testing to the Health Monitoring of Concrete Dams

Table 2

The false alarm rate and missing alarm rate of the dam health monitoring.

Case	Alarm rate	PCA		KPCA		ICA
		Frequency	COMAC	Frequency	COMAC	Frequency	COMAC
1		2.5%	0.5%	0.0%	0.0%	0.0%	0.50%
		97.5%	99.5%	100.0%	100.0%	100.0%	99.50%
2		2.0%	0.0%	1.5%	0.0%	2.0%	0.0%
		98.0%	100.0%	98.5%	100.0%	98.0%	100.0%
3		57.5%	7.5%	7.5%	5.0%	6.0%	2.5%
		42.5%	92.5%	92.5%	95.0%	94.0%	97.5%
4		34.0%	0.0%	15.5%	0.0%	7.0%	0.0%
		66.0%	100.0%	84.5%	100.0%	93.0%	100.0%
5		11.0%	0.0%	5.0%	0.0%	0.0%	0.0%
		89.0%	100.0%	9.5%	100.0%	100.0%	100.0%