Leveraging Sentence Similarity in Natural Language Generation:Improving Beam Search using Range Voting
Table 4: BLEU scores on newstest2014, with range voting applied to the beams obtained with no-copy filtering.
['Beam size  [ITALIC] k', '1', '2', '4', '10', '30', '100']
BLEU scores Regardless of which similarity metric is used, re-ranking using range voting improves the BLEU score, and with the overlap2 similarity, we achieve the best overall score of 25.70. Furthermore, the performance drop at large beam sizes is reduced when using range voting to about 1 BLEU point for overlap2.