Zhao Yawen, Yang Liu. The inverse problem of radiative coefficient for semi-unbounded degenerate parabolic equations[J/OL]. Acta Scientiarum Naturalium Universitatis Sunyatseni, 2026, 1-13.
Zhao Yawen, Yang Liu. The inverse problem of radiative coefficient for semi-unbounded degenerate parabolic equations[J/OL]. Acta Scientiarum Naturalium Universitatis Sunyatseni, 2026, 1-13.DOI: 10.11714/acta.snus.ZR20260021.
A systematic investigation is conducted on the inverse problem of radiative coefficient reconstruction for a class of degenerate parabolic equations defined on semi-unbounded domains. The study begins by introducing an exact artificial boundary condition,which effectively reduces the original problem on the semi-unbounded region to an equivalent formulation on a bounded domain. Within the optimal control framework,the inverse problem is reformulated as a minimization problem. A priori estimates for the direct problem are derived,and the existence of a minimizer for the control functional is established,along with the necessary conditions satisfied by the extremum. The uniqueness and stability of the minimizer are demonstrated through an analysis based on these necessary conditions. Finally,based on the necessary optimality conditions,a gradient-based optimization algorithm was designed,and numerical examples were presented to demonstrate its effectiveness.
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