基于多译文的中文转述语料库建设及转述评价方案

转述语料是转述现象研究的基础。针对目前学术界中文转述语料稀缺的现状,该文以《简爱》的多个中文译本为基础,通过句对齐得到五万句级别的平行转述语料。使用无监督的小句对齐和词对齐算法,从语料中挖掘到九千多对词汇转述知识。同时,还复现和改进了机器翻译测评指标 Meteor,使得该指标更适合于中文转述句子的测评,并构造了一个中文句子转述测评数据集,以便对不同的转述知识和评价指标进行比较。实验表明,该文算法挖掘到的词汇转述知识在封闭测试中不逊于《同义词词林》。

Multi-translation Based Chinese Paraphrase: Evaluation Metric and Corpus

Paraphrase corpus is fundamental to research in paraphrase phenomenon, while Chinese paraphrase corpus is hardly available in academia. In this paper, we collected multiple Chinese translations of the novel Jane Eyre, obtaining roughly 50 000 parallel paraphrasing sentences. Then, we managed to extract more than 9 000 pairs of lexical paraphrase knowledge. We further modified METEOR, an automatic machine translation evaluation metric, to better evaluate Chinese paraphrase quality and provided a Chinese paraphrase evaluation dataset. The close test proved a better quality of our mined knowledge than that of Tongyici Cilin.