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建立了带启动费用与维持费用的多产品动态批量问题模型，讨论了最优解的存在性及其特征，提出有效地解决此问题的分枝定界法
A multi-product dynamic batch problem model with startup costs and maintenance costs is established. The existence and characteristics of optimal solutions are discussed, and a branch-and-bound method is proposed to effectively solve this problem.