| Acknowledgement | 第1-5页 |
| 摘要 | 第5-8页 |
| Abstract | 第8-15页 |
| Abbreviations and nomenclature | 第15-17页 |
| List of Table | 第17-19页 |
| List of Figure | 第19-21页 |
| Introduction | 第21-31页 |
| Chapter One Literature review | 第31-43页 |
| ·Previous studies on English modal verbs | 第31-35页 |
| ·Studies on word sense disambiguation | 第35-39页 |
| ·Fuzzy logic and adaptive neuro-fuzzy inference system | 第39-40页 |
| ·Studies on fuzzy c-means clustering | 第40-43页 |
| Chapter Two Some views on English modal verbs | 第43-55页 |
| ·Ambiguity view | 第43-44页 |
| ·Polyseous view | 第44-45页 |
| ·Monosemous view | 第45页 |
| ·Logical views | 第45-46页 |
| ·Cognitive views | 第46-47页 |
| ·Functional views | 第47-48页 |
| ·Fuzzy views | 第48-49页 |
| ·Categorizations of English modal verbs | 第49-55页 |
| Chapter Three Indeterminacy of English modal verbs | 第55-67页 |
| ·Gradience | 第56-59页 |
| ·Ambiguity | 第59-62页 |
| ·Lexical ambiguity | 第59-61页 |
| ·Syntactic ambiguity | 第61页 |
| ·Pragmatical ambiguity | 第61-62页 |
| ·Morphological (grammar) ambiguity | 第62页 |
| ·Semantic ambiguity | 第62页 |
| ·Merger | 第62-64页 |
| ·Some indeterminacy in modal verbs | 第64-67页 |
| ·Gradiences in modal verbs | 第64页 |
| ·Mergers in modal verbs | 第64页 |
| ·Merger in modal verbs | 第64-67页 |
| Chapter Four Philosophical readings of modal meanings | 第67-77页 |
| ·Reference, manner and sense of modal verbs | 第67-68页 |
| ·Meaning as use and modal verbs | 第68-73页 |
| ·The “family resemblance”of modal verbs | 第73-75页 |
| ·Philosophical possibility of WSD of English modal verbs | 第75-77页 |
| Chapter Five WSD of English modal verbs may and must by BP neural network | 第77-109页 |
| ·Introduction | 第77-81页 |
| ·WSD of may by BP neural network | 第81-95页 |
| ·Categorization of the senses of may | 第81页 |
| ·Data | 第81-82页 |
| ·Extraction of semantic and syntactic features of may | 第82-87页 |
| ·Vectorization of linguistic features | 第87-89页 |
| ·Design of BP neural network | 第89-90页 |
| ·Contributions of linguistic features to WSD of may | 第90-95页 |
| ·WSD of must by BP neural network | 第95-107页 |
| ·Categorization of senses of must | 第95-96页 |
| ·Data | 第96-97页 |
| ·Extraction of semantic and syntactic features of must | 第97-98页 |
| ·Vectorization of the linguistic features | 第98-100页 |
| ·Design of BP neural network | 第100-102页 |
| ·Contributions of linguistic features to WSD of must | 第102-107页 |
| ·A comparison of WSD of may and must by BP neural network | 第107-109页 |
| Chapter Six WSD of must by support vector machine | 第109-119页 |
| ·Introduction | 第109页 |
| ·A mathematical model of SVM | 第109-110页 |
| ·Data | 第110-112页 |
| ·Design of SVM | 第112-114页 |
| ·Summary | 第114页 |
| ·A comparison of WSD by BP neural network and SVM | 第114-119页 |
| ·Some further experiments | 第116页 |
| ·A comparison of experimental results by the two models | 第116-119页 |
| Chapter Seven Syntactic feature based WSD of must by Na?ve Bayesian model | 第119-125页 |
| ·Introduction | 第119页 |
| ·Bayesian classifier | 第119-120页 |
| ·Design of the Na?ve Bayesian model | 第120-123页 |
| ·Data and feature extraction | 第120-121页 |
| ·Design of the Bayesian model of must | 第121-123页 |
| ·Summary | 第123-125页 |
| Chapter Eight Word sense inference of must and can by ANFIS | 第125-153页 |
| ·Introduction | 第125-126页 |
| ·Sense inference of must (srtong obligation →weak obligation) | 第126-133页 |
| ·Fuzziness of must | 第126-127页 |
| ·Data and Feature extraction | 第127-130页 |
| ·Design of ANFIS for inference of meanings of root must | 第130-133页 |
| ·Summary | 第133页 |
| ·Sense inference of can | 第133-153页 |
| ·Fuzziness of can | 第133-134页 |
| ·Distribution of the senses of can by kmeans clustering | 第134-136页 |
| ·Gradient between can (ability) and can (possibility) | 第136-138页 |
| ·Inference of senses of can (ability →possibility) by ANFIS | 第138-145页 |
| ·Gradient between can (permission) and can (possibility) | 第145-146页 |
| ·Inference of senses of can (permission →possibility) by ANFIS | 第146-152页 |
| ·Summary | 第152-153页 |
| Chapter Nine Determination of the senses of will by fuzzy c-means clustering | 第153-161页 |
| ·Introduction | 第153页 |
| ·Fuzzy c-means clustering | 第153-154页 |
| ·Data preprocessing | 第154-158页 |
| ·Determination of the senses of will by FCM clustering | 第158-160页 |
| ·Summary | 第160-161页 |
| Conclusion | 第161-165页 |
| Bibliography | 第165-177页 |
| Appendix Ⅰ | 第177-180页 |
| Appendix Ⅱ | 第180-183页 |
| Appendix Ⅲ | 第183-187页 |
| 攻读博士学位期间承担的科研任务与主要成果 | 第187-189页 |
