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统计口径与数据新鲜度

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新论文 · v1arXiv:2611.17083

带时间窗口与延迟的列表更新:非批量服务模型

List Update with Time Windows and Delays without Batch-Serving

Icey Siyi Ai, Jingwei Li, Clifford Stein

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研究每次请求都需单独访问的列表更新问题,在时间窗口重叠度受限和延迟场景下给出竞争比分析与算法。

cs.DS

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We study list update with time windows and delays when every request requires a separate access. Unlike batch-serving models, serving several requests to one element still incurs one access per request, and each access may change the list for subsequent requests. For time windows of overlap at most $k\ge2$, our deterministic First-Element Removal algorithm is $(3-2/k)$-competitive, hence $3$-competitive in general. Against an oblivious adversary, a randomized adaptation of BIT is $7/4$-competitive on arbitrary $2$-overlap inputs. More generally, on inputs without self-overlap, it is $\left(13/4-9/[2(k+1)]\right)$-competitive for every $k\ge2$. For delays, we give a deterministic $5$-competitive algorithm and a lower bound of $2+\sqrt3$ for deterministic delay-unaware algorithms. Our analyses extend inversion potentials with per-request credits that reconcile different service times and orders.