arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1903.09481math.OC
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网络系统凸优化的分散近似牛顿法

Decentralized Approximate Newton Methods for Convex Optimization on Networked Systems

Hejie Wei, Zhihai Qu, Xuyang Wu, Hao Wang, Jie Lu

摘要:

本文提出了一类求解网络系统上凸优化的分散近似牛顿(DEAN)方法,网络系统中的节点仅通过局部相互作用寻求使各自目标函数之和最小的一致性.所提出的DEAN算法允许每个节点重复执行局部近似牛顿更新,这利用跟踪全局牛顿方向和消散节点之间的差异。与大多数现有的二阶方法相比,在较少限制的问题假设下,DEAN算法使节点能够达成共识,可以任意接近最优。此外,对于一个特定的DEAN算法,节点线性收敛到一个显式的误差界的共同的次优解。最后,仿真结果表明DEAN在收敛速度,精度和效率方面具有竞争力的性能。

英文摘要:

In this paper, a class of Decentralized Approximate Newton (DEAN) methods for addressing convex optimization on a networked system are developed, where nodes in the networked system seek for a consensus that minimizes the sum of their individual objective functions through local interactions only. The proposed DEAN algorithms allow each node to repeatedly perform a local approximate Newton update, which leverages tracking the global Newton direction and dissipating the discrepancies among the nodes. Under less restrictive problem assumptions in comparison with most existing second-order methods, the DEAN algorithms enable the nodes to reach a consensus that can be arbitrarily close to the optimum. Moreover, for a particular DEAN algorithm, the nodes linearly converge to a common suboptimal solution with an explicit error bound. Finally, simulations demonstrate the competitive performance of DEAN in convergence speed, accuracy, and efficiency.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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