fyao

Results 3 issues of fyao

I've run the program successfully,but the display result is wrong, do you know why?? ![result](https://user-images.githubusercontent.com/30283150/53320031-42d41a00-390f-11e9-916b-f0559cca58cf.jpg)

### Prerequisite - [x] I have searched [Issues](https://github.com/open-mmlab/mmdetection3d/issues) and [Discussions](https://github.com/open-mmlab/mmdetection3d/discussions) but cannot get the expected help. - [x] I have read the [FAQ documentation](https://mmdetection3d.readthedocs.io/en/latest/notes/faq.html) but cannot get the expected help....

W1011 17:07:55.921258 79684 gpu_resources.cc:119] Please NOTE: device: 0, GPU Compute Capability: 8.6, Driver API Version: 12.2, Runtime API Version: 11.8 W1011 17:07:55.921286 79684 gpu_resources.cc:164] device: 0, cuDNN Version: 8.9. Exception...