python3.6 cudnn7.4 cuda9.0 tensorflow-gpu1.4 keras2.0.8 安装
https://developer.nvidia.com/rdp/cudnn-archive(cudnn官网下载目录与cuda版本对应关系)https://developer.nvidia.com/cuda-toolkit-archive(cuda官网下载地址)https://tensorflow.google.cn/install/source_windows#gpu(tensorflow-gp