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arXiv 2403.03039math.OC
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面向一般连续能量受限调度问题的混合优化框架

A hybrid optimization framework for the General Continuous Energy-Constrained Scheduling Problem

Roel Brouwer, Marjan van den Akker, Han Hoogeveen

AI总结:

本文针对源于能源需求响应的General CECSP,提出结合局部搜索、线性规划与O(n)下界的混合优化框架,并通过基于事件的两阶段分解确定事件顺序、时间及资源消耗曲线。

摘要:

我们提出了一个混合优化框架,用于一类被形式化为连续能量受限调度问题(Continuous Energy-Constrained Scheduling Problem,CECSP)推广形式的问题;CECSP由Nattaf等人于2014年提出。该问题类别源于能源网络中需求响应相关的挑战。我们的框架扩展了此前开发的一种方法。一组作业必须在连续的共享资源上进行处理。因此,一个作业的调度不仅包含开始时间和完成时间,还包含资源消耗曲线;在此过程中,必须遵守处理期间资源消耗的下界和上界。在本研究中,我们针对目标函数为完成时间的阶梯递增函数的情形,开发了一种混合方法,其中使用局部搜索、线性规划以及O(n)下界。我们利用局部搜索中成本已知这一特点,并使用这些下界来评估可行性,其效率高于通过LP进行评估。我们将其性能与一个混合整数线性规划进行了比较。随后,我们将此方法扩展为面向General CECSP(一般CECSP)的混合优化框架。该框架采用基于事件的模型,并应用两部分分解:1)确定事件顺序;2)寻找事件时间,从而确定作业的开始时间和完成时间以及资源消耗曲线。我们论证了该框架的广泛适用性。

英文摘要:

We present a hybrid optimization framework for a class of problems, formalized as a generalization of the Continuous Energy-Con\-strained Scheduling Problem (CECSP), introduced by Nattaf et al. (2014). This class is obtained from challenges concerning demand response in energy networks. Our framework extends a previously developed approach. A set of jobs has to be processed on a continuous, shared resource. Consequently, a schedule for a job does not only contain a start and completion time, but also a resource consumption profile, where we have to respect lower and upper bounds on resource consumption during processing. In this work, we develop a hybrid approach for the case where the objective is a step-wise increasing function of completion time, using local search, linear programming and O(n) lower bounds. We exploit that the costs are known in the local search and use bounds to assess feasibility more efficiently than by LP. We compare its performance to a mixed-integer linear program. After that, we extend this to a hybrid optimization framework for the General CECSP. This uses an event-based model, and applies a decomposition in two parts: 1) determining the order of events and 2) finding the event times, and hence the start and completion times of jobs, together with the resource consumption profiles. We argue the broad applicability of this framework.

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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