主题词:Adaptive Parameter Estimation,Control-oriented Model,Nonlinear Parameterized Function of Fuel Cells,Temperature Control of Fuel Cells,Proton-exchange Membrane Fuel Cells (PEMFC),Solid Oxide Fuel Cell,Nonlinear Uncertain Systems,Unknown System Dynamics Estimator,PI Control Strategy,Controller Design for Fuel Cell Systems,Thermal Energy Balance,PEMFC System Performance