  After showing the efficiency of feedforward networks to estimate control in
high dimension in the global optimization of some storages problems, we develop
a modification of an algorithm based on some dynamic programming principle. We
show that classical feedforward networks are not effective to estimate Bellman
values for reservoir problems and we propose some neural networks giving far
better results. At last, we develop a new algorithm mixing LP resolution and
conditional cuts calculated by neural networks to solve some stochastic linear
problems.
