TS-PINN: a dual-branch physics-informed neural network based on two-source theory for evapotranspiration estimation - Xing Rong; Chunlin Huang; Feinan Xu; Jinliang Hou; Peng Dou; Ying Zhang; Qiang Bie; Tianwen Feng; Zhihua Zhang (Journal of Hydrology, 2026)