(1) Yu-Xiang Liu, Exact controllability of the wave equation with time-dependent and variable coefficients. Nonlinear Analysis: Real World Applications,2019,45:226—238.(SCI一区) (2) Yu-Xiang Liu,Polynomial decay of a variable coefficient wave equation with an acoustic undamped boundary condition. Journal of Mathematical Analysis and Application, 2019, 479: 1641—1652. (SCI一区) |