s变换是时频分析领域中一个较新的内容，现在在信号处理，地震勘探，语音识别等领域都开始了对它的应用研究，是目前的一个热点(S transform is a relatively new content in time-frequency analysis field. Now it has been applied in signal processing, seismic exploration, speech recognition and so on. It is a hot spot at present)