计算机语言学语料库语言学机器翻译.ppt

1、a,1,Chapter 10 Language and Computer,English Linguistics: An Introduction,a,2,Chapter 10 Language and Computer,0. Warm-up Questions 1. Computational Linguistics 2. CALL 3. Machine Translation 4. Corpus Linguistics,a,3,0. Warm-up Questions,In what ways can computer facilitate our language learning? T

2、o what extent do you rely on computer in your English learning? How to improve the output quality of machine translation? What is the impact of the Internet on machine translation,a,4,1. Computational Linguistics,1.1 Definition (p226,A branch of applied linguistics, dealing with computer processing

3、of human language,1.2 Related subjects,Programmed instruction 编序教学法、程式化教学 Speech synthesis 言语合成 Automatic recognition of human speech Automatic translation of natural languages Communication between people and computers Text processing, etc,a,5,2. CALL,2.1 CAI, CAL, CALL (p226,CAI: Computer-assisted

4、 Instruction CAL: Computer-assisted Learning CALL: Computer-assisted Language Learning,2.2 Phases of CALL,Behavioristic CALL: computer as tutor Communicative CALL: computer as stimulus Integrative CALL: multimedia and the Internet,a,6,2. CALL,2.3 Types of CALL programs,Davies T2T MT, S2S MT, S2T MT,

5、 T2S MT,3.2 History of development,1950s: independent work by MT researchers 1960s: hope for good quality Since 1970s: computer-based tools,a,8,3. Machine Translation,3.3 Research methods,Rule-based: Transfer- Retrieve all examples of a particular word; Compare the different usages of the same word;

6、 Analyse keywords; Analyse word frequencies; Find and analyse phrases and idioms; Create indexes and word lists, etc,a,12,4. Corpus Linguistics,4.4 For language study,Lexical studies: complete and precise definitions and usage of words and phrases. Grammar: The potential for the representative quantification of a whole language variety. Their role as empirical data for the testing of hypotheses derived from grammatical theory. Semantics: an empirical objective indicator of a part