R1-Searcher++: Incentivizing the Dynamic Knowledge Acquisition of LLMs via Reinforcement Learning. - Huatong Song; Jinhao Jiang; Wenqing Tian; Zhipeng Chen 001; Yuhuan Wu; Jiahao Zhao; Yingqian Min; Wayne Xin Zhao; Lei Fang; Ji-Rong Wen (CoRR, 2025)