21. 参考文献
● Neural machine translation by jointly learning to align and translate.
Bahdanau et al., ICLR 2015
● Memory-enhanced decoder for neural machine translation. Wang et al.,
EMNLP 2016
● Incorporating structural alignment biases into an attentional neural translation
model. Cohn et al., NAACL 2016
● Incorporating discrete translation lexicons into neural machine translation.
Arthur et al., EMNLP 2016
● Addressing the rare word problem in neural machine translation. Luong et al.,
ACL 2015
● Towards zero unknown word in neural machine translation. Li et al., IJCAI
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