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arXiv 1611.03382cs.CL
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具有重复读取和复制机制的高效摘要

Efficient Summarization with Read-Again and Copy Mechanism

Tsinghua University(清华大学);University of Toronto(多伦多大学)

Wenyuan Zeng, Wenjie Luo, Sanja Fidler, Raquel Urtasun

摘要:

编码器-解码器模型已被广泛用于解决序列到序列预测任务。然而,目前的方法有两个缺点。首先,编码器计算每个单词的表示,只考虑到到目前为止已经读取的单词的历史,产生次优表示。第二,当前的解码器利用大的词汇表,以便最小化未知词的问题,导致解码时间慢。在本文中,我们解决这两个缺点。为了实现这个目标,我们首先引入一个简单的机制,在提交每个单词的表示之前,首先读取输入序列。此外,我们提出了一个简单的复制机制,能够利用非常小的词汇表和处理词汇表外的话。我们证明了我们的方法在Gigaword数据集和DUC竞争中的有效性,优于最先进的技术。

英文摘要:

Encoder-decoder models have been widely used to solve sequence to sequence prediction tasks. However current approaches suffer from two shortcomings. First, the encoders compute a representation of each word taking into account only the history of the words it has read so far, yielding suboptimal representations. Second, current decoders utilize large vocabularies in order to minimize the problem of unknown words, resulting in slow decoding times. In this paper we address both shortcomings. Towards this goal, we first introduce a simple mechanism that first reads the input sequence before committing to a representation of each word. Furthermore, we propose a simple copy mechanism that is able to exploit very small vocabularies and handle out-of-vocabulary words. We demonstrate the effectiveness of our approach on the Gigaword dataset and DUC competition outperforming 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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