Chaotic time series prediction using DTIGNet based on improved temporal-inception and GRU.

To improve the prediction accuracy of chaotic time series, deep extraction of the system evolutionary patterns is a key problem in modeling. In this paper, we propose a deep learning model of automatic multi-scale feature extraction for chaotic time series prediction. A hybrid deep neural network named deep temporal-inception module and gated recurrent unit network (DTIGNet) is designed. The improved temporal-inception module stacks dilated causal convolution of different depth to increase the network adaptability to different scales and improve the network nonlinear characterization ability, and an optional 1 × 1 convolutional kernel as shared residual connection. The model is applied to the Mackey-Glass system, Rossler system, Lorenz system and sunspots time series to verify the applicability and effectiveness in chaotic time series prediction. The results show that the DTIGNet proposed has higher accuracy and better performance compared with other methods according to the 6 prediction evaluation metrics adopted. • We propose a deep learning model (DTIGNet) of automatic multi-scale feature extraction for chaotic time series prediction. • The improved temporal-inception module proposed extracts data features at different scales. • The results show that the proposed model has lower prediction errors and superior performance than existing models. [ABSTRACT FROM AUTHOR]