w从2次丢下一个球，要求距离和固定来解释褶积
http://colah.github.io/posts/2014-07-Understanding-Convolutions/
Understanding Convolutions
Posted on July 13, 2014
neural networks, convolutional neural networks, convolution, math, probability
In a previous post, we built up an understanding of convolutional neural networks, without referring to any significant mathematics. To go further, however, we need to understand convolutions.
If we just wanted to understand convolutional neural networks, it might suffice to roughly understand convolutions. But the aim of this series is to bring us to the frontier of convolutional neural networks and explore new options. To do that, we’re going to need to understand convolutions very deeply.
Thankfully, with a few examples, convolution becomes quite a straightforward idea.
