Before revision:  Recurrent neural networks  , and in particular Long Short-Term Memory (LSTM) networks  have proven recently that they are able to outperform state-of-the-art univariate time series forecasting methods in this context , when trained across all available time series.
After revision:  Recurrent neural networks (RNNs) , and in particular Long Short-Term Memory (LSTM) networks have proven recently that they are able to outperform state-of-the-art univariate time series forecasting methods in this context , when trained across all available time series.