声明
摘要
ABSTRACT
List of Abbreviations
List of Tables and Figures
Contents
Chapter 1 Introduction
1.1 Background of the Study
1.2 Purpose and Significance of the Study
1.3 Research Questions
1.4 Layout of the Thesis
Chapter 2 Literature Review
2.1 Nautical English as ESP
2.1.1 Background Information of Nautical English
2.1.2 Current Situation of NE Education
2.1.3 Previous Studies on Nautical English
2.2 Introduction to Lexical Study
2.2.1 The Importance of Vocabulary to Reading Comprehension
2.2.2 Previous Lexical Studies on Textbooks
2.3 Introduction to Corpus-based Approach to Lexical Study
2.3.1 Lexieal Density
2.3.2 Lexieal Coverage and Lexical Threshold Theory
2.3.3 Word Length
2.3.4 Word Frequency
Chapter 3 Research Methodology
3.1 Research Design
3.2 Corpus and CERW Wordlist Used in the Study
3.3 Data Processing
3.3.1 Software and Tools for Data Processing
3.3.2 Data Processing Procedures
3.3 Data Analysis Approaches
Chapter 4 Results and Discussion
4.1 Lexical Density of NE Corpus and MCE Corpus
4.2 Lexical Difficulty of NE Corpus and MCE Corpus
4.3 The Lexical Coverage of MCE Wordlist over NE Corpus
4.3.1 Shared words of MCE Wordlist and NE Corpus
4.3.2 Lexical Coverage Rate of the MCE Wordlist over NE Corpus
4.3.3 Top 50 Unique Lemmas in NE Corpus
4.4 Word Length of MCE Corpus and NE Corpus
4.4.1 Mean Word Length
4.4.2 Comparison of Frequency Distribution Between MCE and NE
4.5 High Frequency Words
4.5.1 High Frequency Words of MCE Corpus and NE Corpus
4.4.2 Comparison of Top 50 High Frequency Words
4.5 Hapax Legomena in MCE Corpus and NE Corpus
4.5.1 Word Formation of Hapaxes in NE Corpus
Chapter 5 Conclusion
5.1 Major Findings of the Study
5.2 Implication
5.3 Limitations and Suggestions for Further Study
References
Appendix
Acknowledgements
Resume
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