DeepDiver: Adaptive Web-Search Intensity Scaling via Reinforcement Learning - Shi, Wenxuan; Tan, Haochen; Kuang, Chuqiao; Li, Xiaoguang; Chen, Hanting; Ren, Xiaozhe; Wang, Yasheng; Hou, Lu; Shang, Lifeng (Advances in Neural Information Processing Systems, 2025)