It has verified the regression Equation by the analysis of Power-frequency Spectrum of regression on residual value after removing the influence of the key factors.
然后采用谱分析技术，得出各价格的具体周期，并剔除关键诱因的影响后对回归残差进行功频谱分析，进一步对回归方程进行检验。
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.
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。
The auto power spectrum of phase function commonly has two extreme frequencies, and the corresponding frequency components decide the peak characteristics of phase function.
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。
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