torch下载地址：
https://download.pytorch.org/whl/torch/
torchvision下载地址
https://download.pytorch.org/whl/torchvision/
mmcv下载地址：
将cu和torch版本改为所需版本即可
https://download.openmmlab.com/mmcv/dist/cu101/torch1.8.0/index.html
mmcls下载地址
https://repo.huaweicloud.com/repository/pypi/simple/mmcls/
