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关于模糊工期平行机调度问题的若干结果
IDENTICAL MACHINE SCHEDULING PROBLEM WITH FUZZY DUE-DATES
【摘要】 研究工件工期是模糊数的平行机调度问题,给出最优调度目标函数值在不同分布下该问题的4个性质,证明了Pm|di~=d~|Fmin问题是NP-难的.特别地,分析了当所有工件的dj与ej都相同时,LPT算法所得到的最小满意度相对于最优调度所对应的最小满意度的界.
【Abstract】 For most of scheduling problems,job’s due-dates are treated as crisp values,but that is not proper to all actual situations.In this paper,an identical machine scheduling problem with fuzzy due-dates is considered.Four properties are given by assuming that the due-dates to be fuzzy numbers.The problem(Pm|i=)|Fmin is proved to be NP-hard.The relationship between the minimal satisfiction degree of scheduling results obtained by LPT algorithm and that of optimal algorithm is dicussed.
【关键词】 模糊工期;
最小满意度;
可行调度;
LPT规则;
【Key words】 fuzzy due-dates; min-satisfaction degree; feasible scheduling; LPT algorithm;
【Key words】 fuzzy due-dates; min-satisfaction degree; feasible scheduling; LPT algorithm;
【基金】 国家自然科学基金资助项目(60474023);教育部博士点基金资助项目(20020027013);教育部科学技术重点项目资助项目(03184);中国博士后科学基金资助项目(2005037316);国家“九七三”计划资助项目(2002CB312200)
- 【文献出处】 北京师范大学学报(自然科学版) ,Journal of Beijing Normal University(Natural Science) , 编辑部邮箱 ,2006年03期
- 【分类号】O159
- 【被引频次】4
- 【下载频次】103