参考文档

1. https://www.zhihu.com/question/264303591 请问池化层（global avgpool）的作用是分类？
2. http://blog.csdn.net/losteng/article/details/51520555 Global average Pooling
3. https://www.quora.com/What-is-global-average-pooling What is global average pooling?
4. http://blog.csdn.net/williamyi96/article/details/77530995 Global Average Pooling对全连接层的可替代性分析