| Acknowledgement | 第5-6页 |
| 摘要 | 第6-10页 |
| Abstract | 第10-14页 |
| Preface | 第15-18页 |
| 1 Introduction | 第18-23页 |
| 1.1 Research Background and Current Status Quo | 第18-20页 |
| 1.2 The significance of the research | 第20-21页 |
| 1.3 The main work of this paper | 第21页 |
| 1.4 The structure of the thesis | 第21-23页 |
| 2 The Working Principle and Fault Analysis of Traction Converter | 第23-28页 |
| 2.1 The circuit structure and working principle of traction converter | 第23-25页 |
| 2.1.1 The circuit structure | 第23-24页 |
| 2.1.2 The working principle of traction converter | 第24-25页 |
| 2.2 Fault model of traction converter | 第25-27页 |
| 2.3 Fault Feature Extraction of Traction Converter | 第27页 |
| 2.4 Chapter Summary | 第27-28页 |
| 3 The Neural Network Theory | 第28-36页 |
| 3.1 Introduction to Neural Networks | 第28-30页 |
| 3.2 The principle and algorithm of BP neural networks | 第30-35页 |
| 3.2.1 The basic principle of BP neural network | 第30-32页 |
| 3.2.2 Program implementation of BP algorithm | 第32-33页 |
| 3.2.3 The Importance of Neural Network in Fault diagnosis | 第33-35页 |
| 3.3 Chapter Summary | 第35-36页 |
| 4 Spark Parallelization of BP Neural Network | 第36-44页 |
| 4.1 Hadoop Framework | 第36-38页 |
| 4.2 Spark Framework | 第38-41页 |
| 4.2.1 Spark Ecosystem | 第38-40页 |
| 4.2.2 Spark Architecture | 第40-41页 |
| 4.3 Spark parallel method for BP Neural Network algorithm | 第41-43页 |
| 4.4 Chapter Summary | 第43-44页 |
| 5 The Application of Spark based BP neural network algorithm in fault diagnosisof traction converter | 第44-53页 |
| 5.1 Fault mode of the converter | 第44-45页 |
| 5.2 Fault feature parameters and design of learning samples | 第45-47页 |
| 5.3 Design of BP neural network based on Spark | 第47-49页 |
| 5.4 Implementation and Testing of fault neural network based on Spark parallelmethod | 第49-51页 |
| 5.4.1 The realization of fault diagnosis neural network | 第49页 |
| 5.4.2 The testing of fault diagnosis neural network | 第49-51页 |
| 5.5 Chapter Summary | 第51-53页 |
| 6 Summary and Prospects | 第53-54页 |
| References | 第54-56页 |
| Author Profile and Research Achievements Obtained during the Study for AMaster's Degree | 第56-58页 |
| Data for the Master's Thesis | 第58-59页 |
