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On Distributed Solution of Ill-Conditioned System of Linear Equations under Communication Delays

机译:时滞条件下线性方程组病态系统的分布式解

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This paper considers a distributed solution for a system of linear equations. The underlying peer-to-peer communication network is assumed to be undirected, however, the communication links are subject to potentially large but constant delays. We propose an algorithm that solves a distributed least-squares problem, which is equivalent to solving the system of linear equations. Effectively, the proposed algorithm is a pre-conditioned version of the traditional consensus-based distributed gradient descent (DGD) algorithm. We show that the accuracy of the solution obtained by the proposed algorithm is better than the DGD algorithm, especially when the system of linear equations is ill-conditioned.
机译:本文考虑了线性方程组的分布式解决方案。假定基础对等通信网络是非定向的,但是,通信链路可能会受到较大的延迟,但会产生恒定的延迟。我们提出了一种解决分布式最小二乘问题的算法,该算法等效于求解线性方程组。有效地,所提出的算法是传统的基于共识的分布式梯度下降(DGD)算法的预处理版本。我们表明,该算法获得的解的精度优于DGD算法,尤其是当线性方程组的条件较差时。

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