Deep learning performs remarkably well on many time series analysis tasks recently. The superior performance of deep neural networks relies heavily on a large number of training data to avoid overfitting. However, the labeled data of real-world time series applications may be limited, especially anomaly detection. As an effective way to enhance the size and quality of the training data, data augmentation is crucial to the successful application of deep learning models on time series data. In this thesis, the student will systematically review different data augmentation methods for time series anomaly detection.
The student will implement data augmentation on different CPS anomaly detection datasets and evaluate the results.
1) Literature research of existing anomaly detection datasets in Cyber-Physical Systems.
2) Literature research of state-of-the-art data augmentation method.
3) Categorization of the datasets according to the application field and characteristics.
4) Extract normal and abnormal patterns from real-world data.
5) Transform the extracted patterns into synthetic data.
6) Evaluation of the augmented dataset.
python
Sheng Ding
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