Damage Localization of Cable-Supported Bridges Using Modal Frequency Data and Probabilistic Neural Network

Table 8

Summary of correct identification for Ting Kau Bridge (TKB).

Noise level	Identification accuracy (IA)
	Using 20 frequencies	Using 10 frequencies	Using 5 frequencies
ε = 100%	46.23%	33.35%	27.90%
ε = 80%	57.08%	45.25%	33.05%
ε = 60%	62.55%	51.85%	43.40%
ε = 40%	78.15%	62.90%	51.33%
ε = 20%	84.33%	71.70%	58.75%
ε = 10%	86.42%	73.53%	60.83%
ε = 8%	87.63%	75.08%	63.15%
ε = 6%	88.90%	76.85%	65.80%
ε = 4%	89.32%	77.23%	67.58%
ε = 2%	89.97%	77.35%	67.33%
ε = 1%	90.00%	80.05%	67.70%

Note: IA (identification accuracy) is defined as the ratio of total number of correct identification to total number of testing samples (4000).