Neural networks in geophysical applications

Neural networks are increasingly popular in geophysics. Because they are un iversal approximators, these tools can approximate any continuous function with an arbitrary precision. Hence, they may yield important contributions to finding solutions to a variety of geo physical applications. However, knowledge of many methods and techniques recently developed to inc rease the performance and to facilitate the use of neural networks does not seem to be widespread in the geophysical community. Therefore, the power o f these tools has not yet been explored to their full extent. In this paper , techniques are described for faster training, better overall performance, i.e., generalization, and the automatic estimation of network size and arc hitecture.