NLP Status Report 2017-5-22

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Date People Last Week This Week
2017/5/22 Jiyuan Zhang
Aodong LI
  • bleu of baseline = 43.87
  • 2nd translator uses as training data the concat(Chinese, machine translated English):
 hidden_size, emb_size, lr = 500, 310, 0.001 bleu = 43.53 (best)
 hidden_size, emb_size, lr = 700, 510, 0.001 bleu = 45.21 (best) but most results are under 43.1
 hidden_size, emb_size, lr = 700, 510, 0.0005 bleu = 42.19 (best)
  • double-decoder model with joint loss (final loss = 1st decoder's loss + 2nd decoder's loss):
 bleu = 40.11 (best)
 The 1st decoder's output is generally better than 2nd decoder's output.
  • The training process of double-decoder model without joint loss is problematic.
  • Overfitting? Training large data on 2nd translator
  • Replace the force teaching mechanism in training process with beam search mechanism.
Shiyue Zhang
  • tried to not train embedding but use external word vectors
  • most results of my attempts are bad, only 3-layer rnn + no dropout model got 25.54 bleu which about 2 points worse than original baseline
  • trained original baseline on new data ( the data fixed the reverse sentence problem), got bleu=27.88; moses bleu=32.47
  • try more models to get similar results as original baseline on new data
  • m-nmt model on new data
Shipan Ren
  • learn the implement of seq2seq model
  • read tf_translate code
  • understand the meaning of main code
  • start writing documents