mxnet 常见测层以及打印，输出参数

MXNet 核心接口
https://blog.csdn.net/weixin_33910385/article/details/89541763

Mxnet Module API
https://blog.csdn.net/qfpkzheng/article/details/80401201
https://www.jianshu.com/p/370b4ba17f72