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We investigate the transmission properties of nonlinear superlattice in the presence of a weak electric field. Employed the approximation of plane wave, the nonlinear Schrodinger equation leads to a second order nonlinear difference equation, and we obtain transmission spectrum of wave by iterated the difference equation. The whole spectrum show the transmission coefficient has a distinctive modulation...
Physical and mechanical parameters of marine sediment are correlated to sound velocity. At present, there is some deficiency in sound velocity prediction equation with the help of regression fitting method. So it is difficult to obtain sound velocity prediction equation with more than three parameters. This paper applies artificial intelligent method to build a neural network model of multi-parameter...
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