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We have studied numerically the soliton scattering from one or two impurities in one-dimensional atomic lattices with nonlinear first-neighbor interactions of both quartic and Morse type. Our results for small-amplitude incident solitons are interpreted with some analytical formulas obtained from linear theories, while comparison with linear wave-packet results are made for both low- and high-amplitude incident solitons. Finally, interference effects are studied.
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Li et al. (1988) studied this question.
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