Time frequency analysis method is used to analyze the time domain and frequency domain of seismic waves at the same time according to the principle of wavelet transformation.
时频分析方法是利用小波变换原理，从地震波的时间域和频率域同时对其作出分析。
Fourier transformation in time domain and frequency domain is one of the main methods for modern railway signal detection.
时域分析和傅氏变换的频域分析方法是现代铁路信号检测的主要方法之一。
The main characteristics of wavelet transform is that some character can well outstanding by transformation and it is an important way to study signal in time-frequency domain.
小波变换的主要特点是通过变换能够充分突出某些方面的特征，它是研究信号时-频分析的重要方法。
The model combines good time domain, frequency domain resolving ability of wavelet transformation and nonlinear learning ability of SVM.
该模型具有小波变换的良好时、频域分辨能力和支持向量机的非线性学习能力；
The model combines good time domain, frequency domain resolving ability of wavelet transformation and nonlinear learning ability of SVM.
该模型具有小波变换的良好时、频域分辨能力和支持向量机的非线性学习能力；
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