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Ti1_Ti2
- 对上述数据取一帧(512点), 进行fft变换, 对其模值取对数log后在图上标示(x轴为其频率, 要标注单位)出频谱曲线.-The above data in a fr a me (512 points), FFT transform, the modulus value after taking logarithm log marked on the diagram (x axis as its frequency, to indi