ziyujia/Signal-feature-extraction_DE-and-PSD

The paramter "stft_para.stftn"

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The paramter "stft_para.stftn" means that the frequency domain sampling rate. In the code, the author defined as follow
for i in range(0,len(stft_para['fStart'])): fStartNum[i]=int(fStart[i]/fs*STFTN) fEndNum[i]=int(fEnd[i]/fs*STFTN)
I cant understand the meaning of this code. what is the difference of the paramter “stft_para.stftn" and "stft_para.fs".

I am also having same issues mentioned above. Would you find the differences between them?