S^2 brace FT: Efficient, Scalable and Generalizable LLM Fine-tuning by Structured Sparsity - Yang, Xinyu; Leng, Jixuan; Guo, Geyang; Zhao, Jiawei; Nakada, Ryumei; Zhang, Linjun; Yao, Huaxiu; Chen, Beidi (Advances in Neural Information Processing Systems, 2024)