费用有限的柔性两机自由作业与流水作业排序问题

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研究制造商加工环境为两机自由作业和流水作业柔性排序问题,即工件既可以在制造商两台机器上加工,又可以转包给承包商机器加工.承包商有足够多机器,使得每台机器至多加工一个工件.工件在制造商及承包商机器上所需加工时间及费用均不同.本文需要确定被转包的工件集及未转包工件的加工顺序,在加工及转包总费用不超过给定值的情况下,分别极小化工件最大完工时间及工件总完工时间.证明了四个问题的NP困难性,并对自由作业情形设计多项式时间近似算法.
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