source
https://www.youtube.com/watch?v=tEJDtKu1__0
source
https://www.youtube.com/watch?v=om-TqlNxLno&t=7s
source
https://www.bilibili.com/video/BV1y5411D7a6
reference
McCulloch, W. S., & Pitts, W. (1943). A logical calculus of the ideas immanent in nervous activity. The bulletin of mathematical biophysics, 5(4), 115-133.