Solving an inverse parabolic problem by optimization from final measurement data

Authors:
Qun Chen;Jijun Liu
Affiliations:
Nanjing University of Information Science and Technology and Department of Mathematics, Southeast University, Nanjing, PR China;Department of Mathematics, Southeast University, Nanjing, PR China
Venue:
Journal of Computational and Applied Mathematics
Year:
2006

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Abstract

We consider an inverse problem of reconstructing the coefficient q in the parabolic equation ut - Δu+q(x)u=0 from the final measurement u(x, T), where q is in some subset of L1(Ω). The optimization method, combined with the finite element method, is applied to get the numerical solution under some assumption on q. The existence of minimizer, as well as the convergence of approximate solution in finite-dimensional space, is proven. The new ingredient in this paper is that we do not need uniformly a priori bounds of H1-norm on q. Numerical implementations are also presented.