container微格式：定义portlet容器作为portlets的占位符。
Container microformat: Defines portlet containers as placeholders for portlets.
使用多元复合函数微商法则，导出拉普拉斯算符在柱面坐标系和球面坐标系中表达式。
The Laplacian in the columnar and spherical coordinates is deduced by using the derivative principle of the multivariable functions.
采用改进了的线性组合算符和微扰法导出了极性晶体中与形变势相互作用的表面极化子的有效哈密顿量。
An effective Hamiltonian of surface polaron of interacting with the deformation potential in polar crystals is derived by using improved.
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