Research Article

Preconditioned Conjugate Gradient Algorithm-Based 2D Waveform Inversion for Shallow-Surface Site Characterization

Table 2

Comparative evaluation of the CG and PCG performances in the complex structure model noise-free test.

Optimization algorithmTotal iterationsNormalized final misfit valueInitial value of RMSEFinal value of RMSE

CG100.05870.10220.0644
PCG400.00640.10220.0320