• 论文 •    

设备共享环境下的并发预约问题研究

邵科峰,刘连臣,吴澄   

  1. 清华大学 自动化系,北京100084
  • 出版日期:2006-07-15 发布日期:2006-07-25

Parallel appointments in equipments sharing environment

SHAO Ke-feng, LIU Lian-chen, WU Cheng   

  1. Dep. of Automation, Tsinghua Univ., Beijing100084, China
  • Online:2006-07-15 Published:2006-07-25

摘要: 为解决设备并发预约下的作业调度问题,在分析预约流程和共享模式的基础上,给出了定量数学模型。根据问题的不确定特性和大量用户并发访问的实际情况,提出了基于问题分解的启发式算法。按照SF策略决定区间求解顺序,用改进Dantzig算法求解单区间问题,求解过程中进行局部回溯调整,最后再执行邻域搜索。仿真结果证明了上述步骤的有效性,该算法能在可忽略的时间内获得满意解。

关键词: 设备预约, 启发式算法, 背包问题, 回溯调整, 邻域搜索

Abstract: To solve the job scheduling problem caused by parallel equipment appointments, based on analysis on the appointing process and the sharing rules, a quantitative model of the problem was achieved, which was NP-complete. Because it is nondeterministic and many parallel appointments existed in the actual system, an effective heuristic algorithm based on problem decomposition was proposed. Zones solving order was determined by Spare First (SF) strategy, then every single zone problem was solved by improved Dantzig algorithm, and local trace back was used in every step, finally local search was used to improve the result further. The quantitative simulation showed the better performance of the presented algorithm, which could bring out the satisfied result in few time.

Key words: equipment appointment, heuristic algorithm, knapsack problem, trace back, local search

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