研究具有声学边界条件的非线性波动方程初边值问题，得到整体强解的存在惟一性。
The existence and uniqueness of global solution for the nonlinear wave equations with acoustic boundary conditions are obtained.
本文简略地描述了一个处理恒定电场中非线性电子输运的新方法，并用它讨论强场中声学和光学声子的联合散射效应。
A new approach to nonlinear electronic transport in solids is described briefly and is applied to the discussion of combined acoustic and optical phonon. scattering.
有些极性晶体，电子与表面光学声子（SO）耦合强，与表面声学声子（SA）耦合弱。
There is weak coupling between the electron and SA phonon but strong coupling between the electron and SO phonon for many polar crystals .
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