A column generation approach to the discrete barycenter problem
A column generation approach to the discrete barycenter problem
复制标题
离散重心问题的列生成方法
DOI:
10.1016/j.disopt.2021.100674
复制
发表时间:
2022
影响因子:
1.1
通讯作者:
Patterson, Stephan
中科院分区:
文献类型:
--
作者:
Borgwardt, Steffen;Patterson, Stephan
The discrete Wasserstein barycenter problem is a minimum-cost mass transport problem for a set of discrete probability measures. Although an exact barycenter is computable through linear programming, the underlying linear program can be extremely large. For worst-case input, a best known linear programming formulation is exponential in the number of variables, but has a low number of constraints, making it an interesting candidate for column generation.In this paper, we devise and study two column generation strategies: a natural one based on a simplified computation of reduced costs, and one through a Dantzig–Wolfe decomposition. For the latter, we produce efficiently solvable subproblems, namely, a pricing problem in the form of a classical transportation problem. The two strategies begin with an efficient computation of an initial feasible solution. While the structure of the constraints leads to the computation of the reduced costs of all remaining variables for setup, both approaches may outperform a computation using the full program in speed, and dramatically so in memory requirement. In our computational experiments, we exhibit that, depending on the input, either strategy can become a best choice.
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DOI:
--
发表时间:
2019-09
期刊:
J. Mach. Learn. Res.
影响因子:
--
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通讯作者:
Tianyi Lin;Nhat Ho;Marco Cuturi;Michael I. Jordan
DOI:
10.1051/m2an/2015033
发表时间:
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期刊:
ESAIM-MATHEMATICAL MODELLING AND NUMERICAL ANALYSIS-MODELISATION MATHEMATIQUE ET ANALYSE NUMERIQUE
影响因子:
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DOI:
10.1137/21m1390062
发表时间:
2021
期刊:
ArXiv
影响因子:
--
作者:
Jason M. Altschuler;Enric Boix
通讯作者:
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DOI:
10.1109/cvpr42600.2020.00793
发表时间:
2019
期刊:
2020 IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR)
影响因子:
--
作者:
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通讯作者:
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DOI:
10.1287/ijoo.2019.0020
发表时间:
2018
期刊:
INFORMS J. Optim.
影响因子:
--
作者:
S. Borgwardt;Stephan Patterson
通讯作者:
Stephan Patterson