code: def __init__(self, obs_dim, act_dim):
      super(ValueModel, self).__init__()
      hid1_size = obs_dim * 10
      hid3_size = 5
      hid2_size = int(np.sqrt(hid1_size * hid3_size))
  
      self.lr = 1e-2 / np.sqrt(hid2_size)
  
      self.fc1 = layers.fc(size=hid1_size, act="tanh")
      self.fc2 = layers.fc(size=hid2_size, act="tanh")
      self.fc3 = layers.fc(size=hid3_size, act="tanh")
      self.fc4 = layers.fc(size=1)
  
file_path: PARL/benchmark/fluid/PPO/mujoco_model.py
imports: import numpy
  import parl
  from parl import layers
  from paddle import fluid
  from paddle.fluid.param_attr import ParamAttr
label_desc: Use image node_id 1 to create a new ValueModel object from inherited base classes: parl with example: obj = ValueModel(obs_dim, act_dim)