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- W773941715 abstract "We propose a new variant of the more standard online knapsack problem where the only information missing to the provided instances is the capacity $$B$$ of the knapsack. We refer to this problem as the online Knapsack of Unknown Capacity problem. Any algorithm must provide a strategy for ordering the items that are inserted in the knapsack in an online fashion, until the actual capacity of the knapsack is revealed and the last inserted item might not fit in. Apart from the interest in a new version of the fundamental knapsack problem, the motivations that lead to define this new variant come from energy consumption constraints in smartphone communications. We do provide lower and upper bounds to the problem for various cases. In general, we design an optimal algorithm admitting a $$frac{1}{2}$$-competitive ratio. When all items admit uniform ratio of profit over size, our algorithm provides a $$frac{49}{86}=.569ldots $$ competitive ratio that leaves some gap with the provided bound of $$frac{1}{varphi }=.618ldots $$, the inverse of the golden number. We then conduct experimental analysis for the competitive ratio guaranteed algorithms compared to the optimum and to various heuristics." @default.
- W773941715 created "2016-06-24" @default.
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- W773941715 date "2015-01-01" @default.
- W773941715 modified "2023-09-27" @default.
- W773941715 title "Online Knapsack of Unknown Capacity:" @default.
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- W773941715 doi "https://doi.org/10.1007/978-3-319-20086-6_13" @default.
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