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arXiv 1702.04211cs.DS
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惩罚背包问题的动态规划算法、LP松弛有效解及逼近格式

Dynamic programming algorithms, efficient solution of the LP-relaxation and approximation schemes for the Penalized Knapsack Problem

Federico Della Croce, Ulrich Pferschy, Rosario Scatamacchia

摘要:

0-1惩罚背包问题(PKP)每个项目都有一个利润,一个权重和一个惩罚,目标是最大化利润减去最大惩罚值的总和。我们提出了一个确切的方法依赖于一个程序,缩小了相关的处罚范围,在确定一个核心问题和动态规划。所提出的方法被证明是非常有效的解决硬PKP的情况下,并比较有利的商业求解器CPLEX 12.5适用于ILP制定的问题,并在文献中的最佳精确算法。然后,我们提出了一个一般的不可逼近的结果,并研究了几个相关的特殊情况下,允许完全多项式时间近似计划(FPTAS)。

英文摘要:

We consider the 0-1 Penalized Knapsack Problem (PKP). Each item has a profit, a weight and a penalty and the goal is to maximize the sum of the profits minus the greatest penalty value of the items included in a solution. We propose an exact approach relying on a procedure which narrows the relevant range of penalties, on the identification of a core problem and on dynamic programming. The proposed approach turns out to be very effective in solving hard instances of PKP and compares favorably both to commercial solver CPLEX 12.5 applied to the ILP formulation of the problem and to the best available exact algorithm in the literature. Then we present a general inapproximability result and investigate several relevant special cases which permit fully polynomial time approximation schemes (FPTASs).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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