https://developers.google.com/machine-learning/crash-course/ml-intro
https://github.com/lipiji/JRNN/blob/master/doc/lstm-gru.png
https://towardsdatascience.com/the-deep-learning-ai-dictionary-ade421df39e4
http://dataminingtrend.com/2014/
Referenced papers:
http://keras.io/layers/recurrent/
พยากรณ์หุ้นไม่แม่นด้วย lstm
https://medium.com/@witchapongdaroontham/%E0%B8%A1%E0%B8%B2%E0%B8%A5%E0%B8%AD%E0%B8%87-forecast-%E0%B8%A3%E0%B8%B2%E0%B8%84%E0%B8%B2%E0%B8%AB%E0%B8%B8%E0%B9%89%E0%B8%99%E0%B9%81%E0%B8%9A%E0%B8%9A%E0%B8%87%E0%B9%88%E0%B8%B2%E0%B8%A2%E0%B9%86-%E0%B8%94%E0%B9%89%E0%B8%A7%E0%B8%A2-deep-learning-lstm-python-305c480db223
