时频工具箱，可以对信号进行各种时频变换，提供联合的时间和频率的信息。-time-frequency toolbox, right signal at various frequency conversion, the provision of the Joint time and frequency information.

matlab 时频分析上面程序第八章的故障诊断的小程序-time-frequency analysis matlab above procedures of Chapter VIII of the small fault diagnosis procedure