State Causality and Adaptive Covariance Decomposition Based Time Series Forecasting

Author:

Wang Jince,He Zibo,Geng Tianyu,Huang Feihu,Gong Pu,Yi Peiyu,Peng Jian

Abstract

Time series forecasting is a very vital research topic. The scale of time series in numerous industries has risen considerably in recent years as a result of the advancement of information technology. However, the existing algorithms pay little attention to generating large-scale time series. This article designs a state causality and adaptive covariance decomposition-based time series forecasting method (SCACD). As an observation sequence, the majority of time series is generated under the influence of hidden states. First, SCACD builds neural networks to adaptively estimate the mean and covariance matrix of latent variables; Then, SCACD employs causal convolution to forecast the distribution of future latent variables; Lastly, to avoid loss of information, SCACD applies a sampling approach based on Cholesky decomposition to generate latent variables and observation sequences. Compared to existing outstanding time series prediction models on six real datasets, the model can achieve long-term forecasting while also being lighter, and the forecasting accuracy is improved in the great majority of the prediction tasks.

Funder

National Natural Science Foundation of China

Intelligent Terminal Key Laboratory of Sichuan Province

Sichuan Science and Technology Program

the Cooperative Program of Sichuan University and Yibin

Post doctoral Interdisciplinary Innovation Fund

Publisher

MDPI AG

Subject

Electrical and Electronic Engineering,Biochemistry,Instrumentation,Atomic and Molecular Physics, and Optics,Analytical Chemistry

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