论文标题

在两台分层机器上进行的在线和半对线进行安排,该计算机有一个共同的截止日期,以最大程度地提前工作

Online and semi-online scheduling on two hierarchical machines with a common due date to maximize the total early work

论文作者

Xiao, Man, Liu, Xiaoqiao, Li, Weidong, Chen, Xin, Sterna, Malgorzata, Blazewicz, Jacek

论文摘要

在这项研究中,我们在两台分层机上调查了几个在线和半对线的调度问题,该机器有一个共同的截止日期,以最大程度地提高早期工作。对于纯在线案例,我们设计了一种最佳的在线算法,其竞争比率为$ \ sqrt 2 $。对于已知总处理时间的情况,我们提出了一种最佳的半联盟算法,其竞争比为$ \ frac {4} {3} $。此外,对于最大的处理时间的情况,如果最大的工作是较低的层次结构,则给出了$ \ frac {6} {5} $的最佳算法,如果最大的工作是最大的工作,则最大的工作是较低的层次。

In this study, we investigated several online and semi-online scheduling problems on two hierarchical machines with a common due date to maximize the total early work. For the pure online case, we designed an optimal online algorithm with a competitive ratio of $\sqrt 2$. For the case when the total processing time is known, we proposed an optimal semi-online algorithm with a competitive ratio of $\frac{4}{3}$. Additionally, for the cases when the largest processing time is known, we gave optimal algorithms with a competitive ratio of $\frac{6}{5}$ if the largest job is a lower hierarchy one, and of $\sqrt 5-1$ if the largest job is a higher hierarchy one, respectively.

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