Machine translation systems are very sensitive to the domains they were trained on. Several domain adaptation techniques have been deeply studied. We propose a new technique for neural machine translation (NMT) that we call domain control which is performed at runtime using a unique neural network covering multiple domains. The presented approach shows quality improvements when compared to dedicated domains translating on any of the covered domains and even on out-of-domain data. In addition, model parameters do not need to be re-estimated for each domain, making this effective to real use cases. Evaluation is carried out on English-to-French translation for two different testing scenarios. We first consider the case where an end-user performs translations on a known domain. Secondly, we consider the scenario where the domain is not known and predicted at the sentence level before translating. Results show consistent accuracy improvements for both conditions.

通过对多个领域进行翻译的唯一神经网络在运行时进行的域控制技术，生成的神经机器翻译模型不需要针对每个领域重新估算模型参数，为真实使用场景提供了一种有效的方法，且无论是针对任何一个领域还是针对未知域的数据翻译，本文所提出的新技术都显示了质量的提高。

神经机器翻译的领域控制