Theoretical framework for geoacoustic inversion by adjoint method
Wang Yang1, 2, Zhao Xiao-Feng2, 3, †
       

The flowchart of the iteration process for geoacoustic inversion by adjoint NLBCPE method, where “ 0 R ” means integrating the forward model along the range 0 to R, and “ R 0 ” means integrating the adjoint model in the reverse direction.