Chinese Journal of Mechanical Engineering

Table 5 Relative errors of three-parameter numerical test set for 10.5 mm thickness

From: A Novel On-Site-Real-Time Method for Identifying Characteristic Parameters Using Ultrasonic Echo Groups and Neural Network

Relative error	Parameter class
Relative error	E	υ	ρ
Max (%)	0.30	0.19	0.21
Min (%)	−0.17	−0.14	−0.11
RMS (%)	0.058	0.033	0.044

Note: ANN structure: 501-100-100-3; activation function Tanh; 240 training samples, 60 test samples; loss=2.3 × 10⁻⁷)

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