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Generative Neural Machine Translation

NeurIPS 2018 · Label-efficient and robust learning › Recognition and long-tail · approach: Multilingual language representation pretraining · 41 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Add a language-agnostic latent representation that generates both source and target sentencesGNMT · Missing-word translation across six language directionsBLEU: 26.99 -> 33.23; 27.39 -> 33.46; 23.79 -> 29.84; 23.51 -> 28.27; 22.46 -> 29.83; 25.75 -> 33.09Helped
Share parameters across languages using source- and target-language indicatorsGNMT-Multi · Pure translation with 40K and 400K paired sentencesBLEUHelped
Add monolingual reconstruction trainingGNMT-Multi-SSL · Pure translation with limited paired dataBLEUHelped
Add monolingual reconstruction trainingGNMT-Multi-SSL · Unseen language pairsBLEU: 36.72 -> 38.80; 35.05 -> 37.43; 32.81 -> 34.79; 32.62 -> 34.98; 32.94 -> 33.57; 36.77 -> 38.11Helped
Use GNMT rather than VNMT's conditional latent-variable modelGNMT · Pure translation, 40K and 400K paired sentencesBLEUHelped
Use GNMT rather than VNMTGNMT · Unseen language pairsBLEU: 35.58 vs 35.35; 33.59 vs 33.76; 31.34 vs 31.55; 31.95 vs 31.38; 32.31 vs 32.39; 35.86 vs 35.85Mixed
Anneal the KL-divergence weight from 0 to 1 during the first 50,000 iterationsGNMT and VNMT · Latent-variable model trainingBLEUNo clear effect
Apply 30% word dropout during trainingGNMT · TranslationBLEUHelped
Use the alternative factorization p(z)p(x|z)p(y|z), removing source x from the target-generation condition (ablation)GNMT · Translation quality and grammatical coherenceTranslation qualityHurt

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