The power spectra curve as a function of the mode number of outer or inner profiles are also calculated by the application of fast Fourier transform to the circumferential profile data.

应用快速傅里叶变换算法对靶丸圆周轮廓数据进行分析，获得了靶丸表面外轮廓或内轮廓模数-功率谱特征曲线。

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The results we obtained prove that the power function curve can not only improve the service life of the backup roll but also benefit the profile and shape control of hot rolled strip.

经试验验证，采用幂函数的辊形优化曲线可提高支撑辊使用寿命，并有利于板凸度和板形控制。

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