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Table 1 Performance indicators (RMSE, R 2) and synaptic weights (lines) for the three ANN models (columns) for building class 3

From: Using ambient vibration measurements for risk assessment at an urban scale: from numerical proof of concept to Beirut case study (Lebanon)

  Model 1
Velocity contrast, linear site response
Model 2
H/V amplitude, linear site response
Model 3
Velocity contrast, nonlinear site response
Site amplification proxy C = V smax/V smin A 0HV C = V smax/V smin
Performance indicators
 Δ(DI) standard deviation (initial value: 0.1724) 0.112 0.099 0.103
 Standard deviation reduction (%) 35% 43% 40%
 Coefficient of determination R 2 0.81 0.86 0.82
Synaptic weights
 f struct/f soil 0.51 0.51 0.51
 Site amplification proxy 0.19 0.20 0.16
 PGA 0.30 0.29 0.33