arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1602.06291cs.CL
收藏

大规模NLP任务的上下文LSTM(CLSTM)模型

Contextual LSTM (CLSTM) models for Large scale NLP tasks

Google Research(谷歌研究院)

Shalini Ghosh, Oriol Vinyals, Brian Strope, Scott Roy, Tom Dean, Larry Heck

摘要:

文档在多个抽象级别上展示顺序结构(例如,句子、段落、章节)。这些抽象构成了一个自然的层次结构,用于表示上下文,在上下文中推断单词和更大的文本片段的含义。在本文中,我们提出了CLSTM(Contextual LSTM),这是递归神经网络LSTM(长短期记忆)模型的扩展,其中我们结合了上下文特征(例如,#21453;的模式)。我们在三个特定的NLP任务上评估CLSTM:单词预测,下一句选择和句子主题预测。在两个语料库上运行的实验结果表明,使用单词和主题作为特征可以提高CLSTM模型在这些任务中的性能,这两个语料库分别是维基百科中的英语文档和最近的英语Google News快照中的文章子集。例如,在下一个句子选择任务中,维基百科数据集的相对准确率提高了21%,谷歌新闻数据集提高了18%。这清楚地表明了在自然语言(NL)任务中适当使用上下文的显著好处。这对各种各样的NL应用程序,如问答,句子完成,释义生成,以及对话系统中的下一个话语预测都有影响。

英文摘要:

Documents exhibit sequential structure at multiple levels of abstraction (e.g., sentences, paragraphs, sections). These abstractions constitute a natural hierarchy for representing the context in which to infer the meaning of words and larger fragments of text. In this paper, we present CLSTM (Contextual LSTM), an extension of the recurrent neural network LSTM (Long-Short Term Memory) model, where we incorporate contextual features (e.g., topics) into the model. We evaluate CLSTM on three specific NLP tasks: word prediction, next sentence selection, and sentence topic prediction. Results from experiments run on two corpora, English documents in Wikipedia and a subset of articles from a recent snapshot of English Google News, indicate that using both words and topics as features improves performance of the CLSTM models over baseline LSTM models for these tasks. For example on the next sentence selection task, we get relative accuracy improvements of 21% for the Wikipedia dataset and 18% for the Google News dataset. This clearly demonstrates the significant benefit of using context appropriately in natural language (NL) tasks. This has implications for a wide variety of NL applications like question answering, sentence completion, paraphrase generation, and next utterance prediction in dialog systems.

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。

↑