Title
Improving Lexical Choice in Neural Machine Translation.
Abstract
We explore two solutions to the problem of mistranslating rare words in neural machine translation. First, we argue that the standard output layer, which computes the inner product of a vector representing the context with all possible output word embeddings, rewards frequent words disproportionately, and we propose to fix the norms of both vectors to a constant value. Second, we integrate a simple lexical module which is jointly trained with the rest of the model. We evaluate our approaches on eight language pairs with data sizes ranging from 100k to 8M words, and achieve improvements of up to +4.5 BLEU, surpassing phrase-based translation in nearly all settings.
Year
DOI
Venue
2018
10.18653/v1/N18-1031
north american chapter of the association for computational linguistics
DocType
Volume
Citations 
Conference
abs/1710.01329
4
PageRank 
References 
Authors
0.41
18
2
Name
Order
Citations
PageRank
Toan Nguyen15515.70
David Chiang22843144.76