The problem considered is the non-preemptive scheduling of independent jobs that consume a resource (which is non-renewable and replenished regularly) on parallel uniformly related machines. The input defines the speed of machines, size of jobs, the quantity of resource required by the jobs, the replenished quantities, and replenishment dates of the resource. Every job can start processing only after the required quantity of the resource is allocated to the job. The objective function is the minimization of the convex combination of the makespan and an objective that is equivalent to the $l_p$-norm of the vector of loads of the machines. We present an EPTAS for this problem. Prior to our work only a PTAS was known in this non-renewable resource settings and this PTAS was only for the special case of our problem of makespan minimization on identical machines.
翻译:考虑的问题是,不先发制人地安排独立工作,这种工作消耗资源(不可再生和定期补充)在平行的统一相关机器上。投入确定了机器的速度、工作规模、工作所需的资源数量、补充数量和资源的补充日期。每个工作只能在资源所需数量分配给工作之后才能开始处理。目标功能是最大限度地减少黑锅的混凝体组合,以及一个相当于机器载荷载量中价值l_p$-norm的目标。我们对此问题提出了一个欧洲PTAS。在我们工作之前,在这种不可再生资源环境中只知道PTAS,而这一PTAS只适用于我们在相同的机器上制造最小化问题的特殊情况。