求翻译：构造出凯塞窗与三谱线插值相结合插值函数的快速计算公式，该公式结构简单、程序易于实现、分段点处连续、且拟合精度高，能大幅度提高插值FFT算法的运算速度，分析了该方法在实际应用中的可行性.是什么意思？

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Construct the Kaiser window with 3 line the value with the function of the values of the fast calculation formula that simple structure, easy to achieve, and points of the continuous, and a high degree of precision, and can significantly increase the value FFT algorithm the computational speed, the

The structure leaves the Keyser window to unify the interpolating function with three spectral line interpolations the rapid calculation formula, this formula structure simple, the procedure easy to realize, partition place continuously, also the fitting precision is high, can enhance the interpolat

Kaiser Windows are constructed with three spectral lines interpolation interpolation function calculation formula, the formula is simple in structure, procedures and easy to implement, piecewise continuous at the point, fitting accuracy is high, can greatly improve the speed of interpolated FFT algo

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