About Length A more detailed comparison between DEEPLAU (4 layers encoder and 4 layers decoder), DEEPLAU(2 layer encoder and 2 layer decoder) and DEEPGRU (4 layers encoder and 4 layers decoder), suggest that with deep architectures are essential to the superior performance of our system.
we test the BLEU scores on sentences longer than {10, 20, 30, 40, 50, 60} on the merged test set.