题目 ：A direct imaging method for inverse scattering problem by unbounded rough surfaces
In this talk, we consider the inverse acoustic scattering problems by an unbounded rough surface. A direct imaging method is proposed to reconstruct the rough surfaces from Cauchy data of the scattered field for incident point sources. The performance analysis is also studied by using integral equation method. The reconstruction method is very robust to noises of measured data and works for penetrable surfaces and impenetrable surfaces with Dirichlet or impedance boundary conditions. Finally, numerical examples are carried out to illustrate that our method is fast, accurate and stable.