arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1903.00547cs.DS
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求解随机无界最小背包问题的一个FPTAS

An FPTAS for Stochastic Unbounded Min-Knapsack Problem

Zhihao Jiang, Haoyu Zhao

摘要:

本文研究了随机无界最小背包问题($\textbf{Min-SUKP}$)。一般的无界最小背包问题是这样的:有$n$类型的物品,每种类型的物品都有无限多个。相同类型的物品具有相同的成本和重量。我们希望选择一组项目,使总重量至少为$W$,并且总成本最小化。\prob ~将一般的无界最小背包问题推广到随机环境,其中每个项目的权重是一个遵循已知分布的随机变量,并且相同类型的项目遵循相同的权重分布。在\prob中,不同类型的项目可能具有不同的成本和权重分布。在本文中,我们为$\textbf{Min-SUKP}$提供了一个FPTAS,即,我们的算法计算的近似值至多是$(1+ε)$乘以最优值,并且我们的算法在$poly(1/ε,n,\log W)$时间内运行。

英文摘要:

In this paper, we study the stochastic unbounded min-knapsack problem ($\textbf{Min-SUKP}$). The ordinary unbounded min-knapsack problem states that: There are $n$ types of items, and there is an infinite number of items of each type. The items of the same type have the same cost and weight. We want to choose a set of items such that the total weight is at least $W$ and the total cost is minimized. The \prob~generalizes the ordinary unbounded min-knapsack problem to the stochastic setting, where the weight of each item is a random variable following a known distribution and the items of the same type follow the same weight distribution. In \prob, different types of items may have different cost and weight distributions. In this paper, we provide an FPTAS for $\textbf{Min-SUKP}$, i.e., the approximate value our algorithm computes is at most $(1+ε)$ times the optimum, and our algorithm runs in $poly(1/ε,n,\log W)$ time.

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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