code: def silu(x):
      """sigmoid linear unit activation function"""
      return x * torch.sigmoid(x)
  
imports: import torch
  import torch.nn
  import torch.nn.functional
  from speechbrain.nnet.CNN import Conv1d
  from speechbrain.nnet import linear
  from speechbrain.nnet.diffusion import DenoisingDiffusion
  from math import sqrt
  from torchaudio import transforms
label_desc: Use image node_id 1 for calling a global function with example usage: silu(x) and returns: unknown