Recurrent Neural Network

http://cpmarkchang.logdown.com/posts/278457-neural-network-recurrent-neural-network
https://www.analyticsvidhya.com/blog/2019/01/fundamentals-deep-learning-recurrent-neural-networks-scratch-python/?fbclid=IwAR12s6YSf_CrG-QfU0k80SadiTZqdoZ_aZxLIzQkjT_ewS0qxveSSe3uS_Q