物理含义：能量信号的自相关函数与能量谱密度函数构成傅立叶变换对。

Physical meaning: the self-correlation function and the energy spectrum density function compose a Fourier transform pair.

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通过在自适应零温度弦方法中选择合适的控制函数，可以使得最小能量路径上的网格点密度在这些临界点附近比较大。

By choosing an appropriate monitor function, the density of mesh points near the critical points can be bigger than that near other points on the minimal energy path.

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文章以偏心圆柱电容为例，通过构造一个满足边界条件的势函数，进而得到相应的静电场和电场能量密度。

With an example of eccentric column capacity, a potential function that satisfies the boundary conditions is formed to obtain corresponding electromagnetic field and its energy density.

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