arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1807.00264math.OC
收藏

不动点算法下的增广拉格朗日Optimization

Augmented Lagrangian Optimization under Fixed-Point Arithmetic

Yan Zhang, Michael M. Zavlanos

摘要:

在本文中,我们提出了一个不精确的增广拉格朗日方法(ALM)的优化凸和非光滑的目标函数的线性等式约束和框约束的误差是由于不动点的数据。为了防止数据溢出,我们还在乘数更新中引入了投影操作。我们从理论上分析了所提出的算法,并提供了收敛速度的结果和界的最优解的精度。由于迭代法经常需要解决原始子问题在ALM中,我们还提出了一个早期停止标准,是简单的嵌入式平台上实现,可用于问题,不是强凸的,并保证原始更新的精度。据我们所知,这是第一个不动点ALM,可以处理非光滑问题,数据溢出,并可以有效地和系统地利用迭代求解器在原始更新。效用最大化问题的数值模拟研究,说明所提出的方法。

英文摘要:

In this paper, we propose an inexact Augmented Lagrangian Method (ALM) for the optimization of convex and nonsmooth objective functions subject to linear equality constraints and box constraints where errors are due to fixed-point data. To prevent data overflow we also introduce a projection operation in the multiplier update. We analyze theoretically the proposed algorithm and provide convergence rate results and bounds on the accuracy of the optimal solution. Since iterative methods are often needed to solve the primal subproblem in ALM, we also propose an early stopping criterion that is simple to implement on embedded platforms, can be used for problems that are not strongly convex, and guarantees the precision of the primal update. To the best of our knowledge, this is the first fixed-point ALM that can handle non-smooth problems, data overflow, and can efficiently and systematically utilize iterative solvers in the primal update. Numerical simulation studies on a utility maximization problem are presented that illustrate the proposed method.

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。

↑