The intrachannel interaction of pulses in weakly nonlinear coherent optical fiber lines is theoretically investigated. It shown that the main contribution to perturbation field comes from resonant interactions ordered triplets pulses. structure determined. weight contributions such are calculated. A classification using Löschian numbers proposed. Using computer simulation, dependence average en...

We explain how the kinetic theory of L. Boltzmann is applied to weakly nonlinear wave equations.

instabilities of a thin viscous film flowing down a uniformly heated plane are investigated in this study. the heating generates a surface tension gradient that induces thermocapillary stresses on the free surface. thus, the film is not only influenced by gravity and mean surface tension but also the thermocapillary force is acting on the free surface. moreover, the heat transfer at the free su...