An Empirical Analysis of Anhui Province's Quarterly GDP based on the LSTM and SARIMA Combined Model

This paper uses the data of Anhui Province's quarterly GDP from 2005 to 2022 to build different models for prediction. Two single models, LSTM neural network model and SARIMA model, are established for prediction respectively. On this basis, the combination weights are determined by particle swarm optimization algorithm. It is found that the mean square error (MSE) of the combination using PSO particle swarm optimization algorithm is 0.2236 and 7.0159 lower than that of the two single prediction models, respectively. That is, the proposed combination model based on natural selection particle swarm algorithm to determine the weights of LSTM neural network model and SARIMA model has better prediction effect and higher prediction accuracy. This combination prediction model can be considered to predict the future GDP data of Anhui Province.