perturation method的用法和样例：
例句
- Characteristics of omni-directional dielectric rod grating leaky antennas with arbitrary profiles are investigated by an improved perturbation method.
摘要用改进微扰法分析了任意曲线形状圆柱形介质栅全向天线的辐射特性。 - The ground state energy of the magnetopolaron is derived by using a linear combination operator and the perturbation method.
采用线性组合算符和微扰法，导出了半导体量子点中磁极化子的基态能量。
