text: embedding_dim     = 512
  num_layer_decoder = 6
  num_layer_encoder = 6
  d_ff              = 2048
  num_head          = 8
  dropout_embed     = 0.1
  dropout_sublayer  = 0.1
  normalize_before  = False
  
  
  smoothing     = 0.1
  warmup_steps  = 4000
  factor        = 1
  
  learning_rate    = 1e-9
  min_learning_rate = 0
  beta_1           = 0.9
  beta_2           = 0.98
  eps              = 1e-9
  weight_decay     = 1e-5
  gradient_clipper = 5
  