同时考虑次近邻谐振相互作用和三次方、四次方非谐相互作用 ,利用多重尺度结合准离散近似方法去计算晶格振动行为 ,发现一维非线性点阵中存在包络孤子及正扭结型包络孤子、反扭结型包络孤子 ,解释了自局域结构的幅度只取决于点阵中的固有参数的实验现象 At the same time, the next-nearest-neighbor resonant interaction and the third-order and fourth-order anharmonic interactions are considered, and the lattice vibration behavior is calculated by using multiple scales and quasi-discrete approximation methods. It is found that there exist envelope solitons and positive kinks in one-dimensional nonlinear lattice Enveloping soliton and anti-kinking envelope solitons explain the experimental phenomena that the amplitude of the self-local structure depends only on the intrinsic parameters in the lattice