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中文摘要：
以某轧辊企业铸钢分厂的轧辊热处理调度问题为实际背景，研究了两阶段及三阶段无等待混合流水车间调度问题．针对问题中工件加工无等待特点，设计了分阶段实现的无等待算法；在此基础上，结合离散粒子群优化算法对建立的整数规划模型进行优化求解．通过对真实数据仿真实验所得结果的比较与分析，验证了算法的可行性和有效性，并给出了具有实际参考价值的设备改进策略，对生产决策者合理安排生产具有一定的指导意义．
英文摘要：
A two-stage and three-stage no-wait hybrid flow shop （NWHFS） scheduling problem is considered against a background of the scheduling problem of roller annealing operation in cast steel plant of a roller corporation. For the no-wait constraint between two sequential operations of a job, the no-wait algorithm of grading （NWAG） is designed. On this basis, we tried to combine NWAG with the discrete particle swarm optimization （DPSO） algorithm to solve the built integer programming model. In the simulation experiment with the real data, the feasibility and the effectiveness of the algorithm are demonstrated by the comparisons and analyses of results, and the equipment reformation strategies of actual reference value are given as well which is beneficial for the policy-maker to arrange production reasonably.
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