The fluctuation of results is due to sampling training examples from the translation hy-  Table 2: BLEU-4 results for algorithms 1 (SGD), 2 (MixSGD), 3 (IterMixSDG), and 4 (IterSelSGD) on newscommentary (nc) data.
scaling all features to the full training set shows significant improvements for algorithm 3, and especially for algorithm 4, which gains 0.8 BLEU points over tuning 12 features on the development set.