FedRW: Efficient Privacy-Preserving Data Reweighting for Enhancing Federated Learning of Language Models - Ye, Pukang; Junwei, Luo; Shen, Jiachen; Zhou, Saipan; Dou, Shangmin; Cao, Zhenfu; Yao, Hanzhe; Dong, Xiaolei; Yang, Yunbo (Advances in Neural Information Processing Systems, 2025)