基于语料库的海事碰撞事故调查报告词汇特征研究

发布时间：2019-05-11 08:33

【摘要】：词汇通常被定义为"所有被人熟知以及使用的单词"。词汇是沟通和获取知识的最基本和实用的工具。掌握大量的词汇是学习第二语言的最大挑战之一。词汇是英语教学的中心,因为没有足够的词汇,学生就无法理解他人或表达自身的想法。考虑到词汇的重要性,本文以自建MCAIRs(海事碰撞事故调查报告语料库)为基础,以MAIRs(海事调查报告语料库)和MEE(轮机英语)语料库作为参照语料库,借助自然语言处理的有关方法对海事碰撞事故词汇在词汇密度、词汇覆盖率、词汇重复率以及关键词四方面特征进行量化研究。具体研究问题包括:1.MCAIRs词汇有何语言学特征?(1)与其它体裁的海事英语相比,MCAIRs的词汇密度有何特征?(2)MCAIRs的词汇覆盖率有何特征?(3)如何描述MCAIRs的词汇重复率特征?(4)MCAIRs的关键词有何语言学特征?研究结果表明,词汇密度并不仅仅像传统研究中所述与文本长度呈负相关关系,而是同时被话题丰富度以及词汇量所影响。词汇覆盖率方面,MAIR语料库对于MCAIR语料库的词汇覆盖率(0.1127)要低于MEE对其的词汇覆盖率(0.2263),由此表明,虽然MEE语料库专业性低于MAIR语料库,但词汇数量和话题多样性也影响着词汇覆盖率的变化。通过对三个语料库词汇覆盖率的对比,提取海事碰撞事故报告的高频关键词汇,并制作了关键词词汇表,目的在于科学指导海事调查报告的阅读及撰写。
[Abstract]:Words are usually defined as "all well-known and used words". Vocabulary is the most basic and practical tool for communicating and acquiring knowledge. Mastering a large number of vocabulary is one of the biggest challenges to learning a second language. Vocabulary is the center of English teaching, because without enough vocabulary, students can not understand others or express their own ideas. Considering the importance of vocabulary, this paper is based on MCAIRs (Maritime collision investigation report Corpus) and MAIRs (Marine investigation report Corpus) and MEE (Marine Engineering English) Corpus as reference corpus. With the help of natural language processing, the lexical density, lexical coverage, lexical repetition rate and keyword characteristics of maritime collision accidents are quantitatively studied. The specific research questions include: what are the linguistic features of 1.MCAIRs vocabulary? (1) compared with other genres of maritime English, What are the characteristics of lexical density of MCAIRs? (2) what are the characteristics of lexical coverage of MCAIRs? (3) how to describe the lexical repetition rate of MCAIRs? (4) what are the linguistic features of the keywords of MCAIRs? The results show that lexical density is not only negatively correlated with text length, but also affected by topic richness and vocabulary size, as described in the traditional study. In terms of vocabulary coverage, the lexical coverage of the MAIR corpus for the MCAIR corpus (0.1127) is lower than that for the MEE corpus (0.2263), which indicates that although the professionalism of the MEE corpus is lower than that of the MAIR corpus, However, the number of words and the diversity of topics also affect the change of vocabulary coverage. Through the comparison of the vocabulary coverage of the three corpus, the high frequency key words of maritime collision accident report are extracted, and the keyword vocabulary is made, in order to scientifically guide the reading and writing of maritime investigation report.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：H313

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