Please add a new paper

[BinhuiXie]

Hello, @52CV

We request to add our new work RIPU to this awesome repo.

Title: Towards Fewer Annotations: Active Learning via Region Impurity and Prediction Uncertainty for Domain Adaptive Semantic Segmentation

paper: https://arxiv.org/pdf/2111.12940.pdf code: https://github.com/BIT-DA/RIPU

Thank you!

[52CV]

thanks！