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arXiv 2406.08147math.OCcs.NAmath.NA
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多目标优化中多重梯度下降的新线性规划方法和新回溯策略

A New Linear Programming Approach and a New Backtracking Strategy for Multiple-Gradient Descent in Multi-Objective Optimization

Politecnico di Torino(都灵理工大学);Gruppo Nazionale per il Calcolo Scientifico INdAM(意大利国家计算科学小组)

Francesco Della Santa

AI总结:

本文提出了一种基于线性规划的新方法,用于多目标优化中的多重梯度下降,通过改进回溯策略提升帕累托前沿探索能力。

摘要:

本文作者提出了一种新的方法,用于寻找由两个或更多可微函数在相同无约束域空间上共享的下降方向。然后,作者展示了一种基于此新方法的替代多重梯度下降程序,用于多目标优化问题。具体而言,所提出的方法包括寻找共享下降方向,通过相对经济的线性规划(LP)问题来解决,其中LP的目标函数和约束由多目标优化问题的目标函数的梯度定义。更精确地说,LP问题的制定是这样的,如果目标函数没有共享的下降方向,但所有目标都有非上升方向,则LP问题返回后者。此外,作者定义了新的回溯策略用于多重梯度下降方法,使得如果使用所提出的LP计算方向,则达到和/或探索帕累托集和帕累托前沿的能力得到提高。对新方法的性质进行了理论分析,并提出了经典多目标优化问题的测试以评估其效果。

英文摘要:

In this work, the author presents a novel method for finding descent directions shared by two or more differentiable functions defined on the same unconstrained domain space. Then, the author illustrates an alternative Multiple-Gradient Descent procedure for Multi-Objective Optimization problems that is based on this new method. In particular, the proposed method consists in finding the shared descent direction solving a relatively cheap Linear Programming (LP) problem, where the LP's objective function and the constraints are defined by the gradients of the objective functions of the Multi-Objective Optimization problem. More precisely, the formulation of the LP problem is such that, if a shared descent direction does not exist for the objective functions, but a non-ascent direction for all the objectives does, the LP problem returns the latter. Moreover, the author defines a new backtracking strategy for Multiple-Gradient Descent methods such that, if the proposed LP is used for computing the direction, the ability to reach and/or explore the Pareto set and the Pareto front is improved. A theoretical analysis of the properties of the new methods is performed, and tests on classic Multi-Objective Optimization problems are proposed to assess their goodness.

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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