提出了一种测量群延迟的新方法,利用白光干涉仪产生的光谱干涉,通过时间频率联合分析直接得出群延迟,减小了传统相位差分方法产生......

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目的用时间频率分析方法观察汉语普通话单音节四声的物理特征。方法借助MATLAB7．0和SigmaPlot9．0等相关软件，对40个普通话单音节四声......

In this paper, by applying a group of specific orthogonal wavelet packet to Eykhoff algorithm, a new impulse response id......

The local wave method is a very good time-frequency method for nonstationary vibration signal analysis. But the interfer......