论文第二章研究了等离子体中横向扰动下的(3 + 1)维弱非线性离子声波，得到了描述离子声孤波的(3 + 1)维kp方程。
In chapter two, the (3 + 1) dimensional weakly nonlinear ion acoustic wave at higher order transverse perturbations in plasma was discussed and described by the Kadomtsev-Petviashvili (KP) equation.
研究了磁场中多原子极性晶体中多声子相互作用对弱耦合体极化子基态能量和有效质量的影响。
In this paper, effect of many phonons interaction on the ground state energy and the effective mass of weak-coupling bulk polaron for the polyatomic polar crystals in magnetic field were studied.
推导了具有工程背景的弱正交异性材料的超声波斜入射应力-声关系。
The stress acoustic relationship for off axis ultrasonic wave is derived in slightly orthotropic material.
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