Study on the Applicability of Intelligent Recognition Algorithms to Different Types of Subgrade Defects. - Han, Yu-xuan; Qi, Yan-li; Zhang, Yi; Xue, Yi-guo; Zhao, Jiang; Kong, Fan-meng; Dong, Sheng-yong; Li, Gang; Li, Xin-shun; Shu, Ao-xiong; Zhu, Hao-ran (Applied Geophysics: Bulletin of Chinese Geophysical Society, 2026)