利用相函数的频谱分析求其自功率谱，可以反映它的频率结构。
Using frequency spectrum analysis of phase function to calculate its auto power spectrum can reflect its frequency structure.
相函数的自功率谱一般具有两个峰值频率，其相应的频率分量决定相函数的波峰特征。
The auto power spectrum of phase function commonly has two extreme frequencies, and the corresponding frequency components decide the peak characteristics of phase function.
本文采用自功率谱、逆频谱方法对拖拉机变速箱异常噪声源进行了诊断，找出了产生异常噪声的根源。
With auto-power spectrum and cepstrum, this paper diagnoses the unusual noise source of the gear box, and finds an impaired gear of the box.
实验表明这种改进的互功率谱比值法与传统的自功率谱比值法的方法相比，动作模式识别率得到了提高。
The result of experimentation shows that its recognition of movement was much better than the method using traditional Power Spectrum Coefficient.
在变切削参数的加工工况下，通过对振动信号的采集和频域处理，发现采用单一的自功率谱方法难以有效检测出刀片破损。
Through collecting vibration signal and analyzing it in the frequency domain in the condition of changing parameter cutting, a single self power spectrum is hard to detect tool breakage effectively.
该文针对风速随机变化的特性，在风速统计特性研究的基础上，用自回归滑动平均(ARMA)方法建立了具有一定功率谱密度特性的风速模型。
This paper deals with stochastic characteristic of the wind speed, and gives an auto-regressive moving-average (ARMA) model for wind speed subjected to particular power spectral density.
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.
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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