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 methods of time frequency analysis include linear, quadratic and adaptive methods. They provide effective tools for analyzing signal time varying spectrum in time frequency plane.
时频分析方法分为线性、二次型和自适应等多种方法，它们提供了在时频二维平面上，分析信号时变功率谱的有效手段。
Wavelet transform has a good analyzing feature and a good time frequency localization. Spectrum whitening is a effective tool of frequency compensation in high resolution processing.
小波变换具有分析性质好和时—频局域化好的特性，而谱白化方法是高分辨处理中一种有效的频率补偿手段。
By analyzing the exhaust noise frequency spectrum and the exhaust noise control methods, the muffler is considered a effective way of controlling exhaust noise.
通过对排气噪声的频谱分析及对排气噪声控制方法的讨论，认为消声器能有效控制排气噪声。
With computer technology and the method of analyzing the frequency spectrum, the authors observed the action of Qigong in delaying the reduction of intelligence in the aged.
本文报道利用微机技术和频谱分析方法，观察了气功延缓老年智能减退的作用。
Computing formula of frequency-division of anomalous cosine transform spectrum is given by analyzing the basic feature of cosine transform spectrum for the anomaly of erect rectangular column.
通过分析直立矩形柱体异常的余弦变换谱基本特征，给出了异常余弦变换谱的分频计算公式。
The frequency response characteristic of the tested system can be easily obtained just by giving a chaotic input and analyzing the spectrum of the output.
该方法仅需将混沌信号作为激励信号作用于被侧系统，通过计算系统偷出信号的频谱，便可获得被浏系统的颇率回应特性。
First, based on the characteristics of FCCH in GSM, analyzing the frequency spectrum and the correlation of SCH training sequence are two ways introduced to capture FCCH.
侦察的方法包括：对频率校正信道的侦察采用了直接频谱分析法和通过同步信道训练序列的相关计算方法；
First, based on the characteristics of FCCH in GSM, analyzing the frequency spectrum and the correlation of SCH training sequence are two ways introduced to capture FCCH.
侦察的方法包括：对频率校正信道的侦察采用了直接频谱分析法和通过同步信道训练序列的相关计算方法；
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