提出了用激光衍射功率谱方法测量柱形颗粒群直径分布的技术方法。

A new approach to measure the long cylindrical particle by using the laser diffraction power spectrum method is presented in this paper in detail.

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数值模拟试验显示，这种方法在抑制高斯有色噪声方面优于传统功率谱方法。

Synthetic test shows that the method presented here is superior in suppressing Gaussian colored noise.

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本文用自回归功率谱方法分析了极移、地球自转和大气激发函数的资料，得到了它们的低频谱。

The data of polar motion, rotation of the earth and atmospheric excitation function are analysed by the Auto-Regression power spectrum method, and their spectra at low frequency band are obtained.

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