台湾李宏毅教授的入门视频:https://www.bilibili.com/video/av16543434/
其中对CNN算法的矩阵卷积运算不太理解,可参考
https://blog.csdn.net/deepdsp/article/details/6922612
https://blog.csdn.net/gavin__zhou/article/details/72723494
https://blog.csdn.net/anan1205/article/details/12313593