推导出了具有一般形式的平面简谐波的波动方程，利用此公式求解波动方程简单而且准确。
The wave equation having general forms of planar simple harmonic wave is deduced in this article. It is simple and accurate to solve wave equation by using this formula.
索末菲关于波的展开理论证明，球面波可以展开为平面简谐波的叠加。
Sommerfeld's wave expansion theory demonstrates that a spherical wave can be expanded as the superposition of plane simple harmonic waves.
讨论了一种静电摇摆器中电子的自发辐射谱和高次谐波的增益，其形式与平面磁摇摆器中的类似。
The spontaneous emission spectrum and higher harmonic gain of a relativistic electron in a novel electrostatic wiggler are discussed.
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