docstr: test the sim_matrix function
  Returns:None
docstr_tok: ["test","the","sim_matrix","function","Returns",":","None"]
code: def test_sim_matrix(self):
      """
      test the sim_matrix function
      Returns:None
      """
      x = torch.randn(1, 24)
      y = torch.randn(1, 24)
      out = sim_matrix(x, y)
      self.assertEqual(out.shape, (1, 1))
  
imports: import unittest
  import torch
  from towhee.models.frozen_in_time.frozen_utils import sim_matrix, state_dict_data_parallel_fix, remove_bridge_module_state_dic
label_desc: Use image node_id 1 for calling the ForzenUtilsTest obj's underlying member method code with example usage: obj.test_sim_matrix() without return types