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arXiv 2101.04030cs.CL
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用于神经机器翻译的上下文和序列感知卷积递归编码器

Context- and Sequence-Aware Convolutional Recurrent Encoder for Neural Machine Translation

Delhi Technological University(德里理工大学)

Ritam Mallick, Seba Susan, Vaibhaw Agrawal, Rizul Garg, Prateek Rawal

摘要:

神经机器翻译模型是一种基于神经网络的序列-序列转换器。现有的模型使用递归神经网络来构建编码器和解码器模块。在替代研究中,递归网络被卷积神经网络取代,用于捕获输入句子中的句法结构并减少处理时间。我们结合了这两种方法的优点,提出了一个卷积递归编码器,用于捕获上下文信息以及源语句的顺序信息。源句子的词嵌入和位置嵌入在卷积编码层之前执行,卷积编码层基本上是捕获短语级上下文信息的n元特征提取器。卷积编码层的整流输出被添加到原始嵌入向量,并且总和通过层归一化被归一化。归一化输出作为递归编码层的顺序输入给出,递归编码层捕获序列中的时间信息。对于解码器,我们使用基于注意力的递归神经网络。德语-英语数据集上的翻译任务验证了所提出的方法的有效性,与最先进的技术相比,BLEU得分更高。

英文摘要:

Neural Machine Translation model is a sequence-to-sequence converter based on neural networks. Existing models use recurrent neural networks to construct both the encoder and decoder modules. In alternative research, the recurrent networks were substituted by convolutional neural networks for capturing the syntactic structure in the input sentence and decreasing the processing time. We incorporate the goodness of both approaches by proposing a convolutional-recurrent encoder for capturing the context information as well as the sequential information from the source sentence. Word embedding and position embedding of the source sentence is performed prior to the convolutional encoding layer which is basically a n-gram feature extractor capturing phrase-level context information. The rectified output of the convolutional encoding layer is added to the original embedding vector, and the sum is normalized by layer normalization. The normalized output is given as a sequential input to the recurrent encoding layer that captures the temporal information in the sequence. For the decoder, we use the attention-based recurrent neural network. Translation task on the German-English dataset verifies the efficacy of the proposed approach from the higher BLEU scores achieved as compared to the state of the art.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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