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math.OC2019
A multi-level ADMM algorithm for elliptic PDE-constrained optimization problems
Xiaotong Chen, Xiaoliang Song, Zixuan Chen +1
In this paper, the elliptic PDE-constrained optimization problem with box constraints on the control is studied. To numerically solve the problem, we apply the 'optimize-discretize…
math.NA2019
Structured FISTA for Image Restoration
Zixuan Chen, James Nagy, Yuanzhe Xi +1
In this paper, we propose an efficient numerical scheme for solving some large scale ill-posed linear inverse problems arising from image restoration. In order to accelerate the co…