The NiuTrans Machine Translation Systems for WMT21

09/22/2021

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by   Shuhan Zhou, et al.

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This paper describes NiuTrans neural machine translation systems of the WMT 2021 news translation tasks. We made submissions to 9 language directions, including English↔{Chinese, Japanese, Russian, Icelandic} and English→Hausa tasks. Our primary systems are built on several effective variants of Transformer, e.g., Transformer-DLCL, ODE-Transformer. We also utilize back-translation, knowledge distillation, post-ensemble, and iterative fine-tuning techniques to enhance the model performance further.