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Identification of the unknown heat source terms in a 2D parabolic equation

机译:在2D抛物线方程中识别未知的热源术语

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The objective of this paper is to reconstruct the unknown time-dependent heat source terms numerically, for the first time, in a two-dimensional parabolic equation in the rectangular domain with initial and Neumann boundary conditions supplemented by the temperature data as over-determination conditions. Although, the problem is ill-posed (in the sense of Hadamard) but has a unique solution. We apply the forward time central space finite difference scheme along with the Tikhonov regularization to find a stable and accurate numerical solution. The MATLAB subroutinelsqnonlinis used to solve the resulting nonlinear minimization problem. The obtained results show that accurate and stable solutions are achieved. Computational efficiency of the method is investigated by small values of CPU-time.
机译:本文的目的是首次在矩形域中的二维抛物线方程中重建未知的时间依赖热源术语,其中初始和Neumann边界条件补充在温度数据中作为过度测定条件 。 虽然,问题既不含糊不清(在Hadamard的意义上),但有一个独特的解决方案。 我们应用前进时间中央空间有限差分方案以及Tikhonov正规,找到稳定和准确的数字解决方案。 MATLAB子程序QNONLINIS用于解决产生的非线性最小化问题。 所获得的结果表明,实现了准确和稳定的解决方案。 通过小的CPU时间值研究了该方法的计算效率。

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