Time Series Classification of Sport Activities using Neural Networks

Аннотация

The thesis explores the impact of sliding window data augmentation on the performance of various Recurrent Neural Network (RNN) architectures for time series classification. The study evaluates models based on Long Short-Term Memory (LSTM) layers, SimpleRNN, Gated Recurrent Unit (GRU), and a Hybrid RNN, applied to the classification of five activities: Biking, Roller Skiing (R-Skiing), Running, Skiing, and Walking. The results show that sliding window data augmentation significantly enhances model performance, improving key metrics such as precision, recall, F1-score, and accuracy. Among the models tested, the Hybrid RNN and GRU models demonstrated the highest accuracy and generalization capabilities. Additionally, we tested several window and step sizes. The configuration with a larger window size (256) generally yielded better results. These findings are consistent with existing literature, highlighting the effectiveness of data augmentation and advanced RNN architectures in time series classification. The study highlights the importance of data augmentation in improving model robustness and provides valuable insights for future research and practical applications in various fields.
Keywords: Time Series Classification, Recurrent Neural Networks (RNN), Long Short-Term Memory (LSTM), Gated Recurrent Unit (GRU), Hybrid RNN, Sliding Window Data Augmentation, Data Augmentation, Activity Recognition, Deep Learning, Machine Learning.