与其他方法相比，傅里叶-贝塞尔方法具有计算速度快，数学形式简练，易于理解和应用的优点。
Compared with other methods, the Fourier-Bessel method is of the advantages of fast calculation, simple math format, easy understanding and application.
这个方法是根据周期函数的傅里叶级数的性质和利用数学的抽象性质，直接推导出另外三种形式的傅里叶变换。
According the basic properties of Fourier series of period function and using of the abstract nature of mathematics, the method directly derives other 3 kinds of Fourier transform.
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