On-line stream merging with max span and min coverage

被引：1

作者：

Chan, WT ^{[1
]}

Lam, TW

Ting, HF

Wong, PWH

机构：

[1] Hong Kong Polytech Univ, Dept Comp, Kowloon, Hong Kong, Peoples R China

[2] Univ Hong Kong, Dept Comp Sci, Hong Kong, Hong Kong, Peoples R China

来源：

THEORY OF COMPUTING SYSTEMS | 2005年 / 38卷 / 04期

关键词：

Computational Mathematic; Greedy Algorithm; Competitive Ratio; Performance Guarantee; Simple Greedy Algorithm;

D O I：

10.1007/s00224-004-1182-2

中图分类号：

TP301 [理论、方法];

学科分类号：

081202 ;

摘要：

This paper introduces the notions of span and coverage for analyzing the performance of on-line algorithms for stream merging. It is shown that these two notions can solely determine the competitive ratio of any such algorithm. Furthermore, we devise a simple greedy algorithm that attains the ideal span and coverage, thus giving a better performance guarantee than existing algorithms. The new notions also allow us to obtain a tighter analysis of existing algorithms.

引用

页码：461 / 479

页数：19

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