Conclusions

For the parameterization described in section 4.2, the model can be constructed from the parameters in a direct way. For the methods proposed in this appendix, integrating the relationships between layers into a generic structure would require the definition at the user level of blocks and sub-blocks of layers where $V_p$ and $V_s$ are managed for the whole block and not for each particular layer. The description of such models would be less flexible than the basic description layer by layer detailed in section 4.2. The examples of this section have been calculated by hard coding^B.1 the layer structure for each case. No generic construction tool has been developed until now. Actually, the new conditional neighbourhood algorithm offers the possibility to set whatever condition between any parameters in a very flexible way. This why no special effort has been put on developing ready to use codes for the methods detailed in this section.