Parallel machine scheduling with service hierarchy and rejection(具有服务等级的可拒绝平行机排序问题) od RONGJianhua(荣建华)

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Uniform machine scheduling with arrival time and rejection(带有到达时间和拒绝费用工件的同类机排序问题) od RONGJianhua(荣建华), HOULiying(侯丽英)

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