code: def damping_factor(self):
      return torch.sigmoid(self._damping_factor)
  
imports: import numpy
  import math
  from math import sqrt
  import os
  from scipy.fftpack import next_fast_len
  from merlion.models.utils.nn_modules.blocks import ExponentialSmoothing, conv1d_fft
label_desc: Use image node_id 3 for calling the DampingLayer obj's underlying member method code with example usage: obj.damping_factor() and returns: torch