Latent Network Construction for Univariate Time Series Based on Variational Auto-Encode

• Main Authors: Jiancheng Sun, Zhinan Wu, Si Chen, Huimin Niu, Zongqing Tu
• Format: Article
• Language: English
• Published: MDPI AG 2021-08-01
• Series: Entropy
• Subjects: time series; complex network; statistical manifold; latent space
• Online Access: https://www.mdpi.com/1099-4300/23/8/1071
• ISSN: 1099-4300

Time series analysis has been an important branch of information processing, and the conversion of time series into complex networks provides a new means to understand and analyze time series. In this work, using Variational Auto-Encode (VAE), we explored the construction of latent networks for univariate time series. We first trained the VAE to obtain the space of latent probability distributions of the time series and then decomposed the multivariate Gaussian distribution into multiple univariate Gaussian distributions. By measuring the distance between univariate Gaussian distributions on a statistical manifold, the latent network construction was finally achieved. The experimental results show that the latent network can effectively retain the original information of the time series and provide a new data structure for the downstream tasks.