It can get not only high time-frequency resolution, but also parametric description of all kinds of data structures.

它不仅可以获得较好的时频分辨率，而且可以参数化描述任何类型的数据。

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It has the properties of high time-frequency resolution and energy concentration as well as tracking instantaneous frequency etc.

它具有很高的时频分辨率、能量集中性和跟踪瞬时频率等特性。

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After denoising, it analyzes PCG signal by Short-Time Fourier Transform (STFT). Different window-width is corresponding to different time-frequency resolution.

对去噪后的心音信号，本文进行了短时傅立叶变换，不同长度的时间窗对应了不用的时频分辨率。

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