###
Journal of Software:2016.27(7):1685-1699

基于可能世界模型的关系数据不一致性的修复
徐耀丽,李战怀,陈群,钟评
(西北工业大学 计算机学院, 陕西 西安 710129)
Repairing Inconsistent Relational Data Based on Possible World Model
XU Yao-Li,LI Zhan-Huai,CHEN Qun,ZHONG Ping
(School of Computer Science and Technology, Northwestern Polytechnical University, Xi'an 710129, China)
Abstract
Chart / table
Reference
Similar Articles
Article :Browse 2979   Download 1630
Received:October 14, 2015    Revised:January 12, 2016
> 中文摘要: 针对关系数据的不一致性虽然已有各种修复方法被提出,但这些修复策略在构建最终修复方案的过程中只分析函数依赖包含属性的信息(即,数据集的部分信息),且偏向于修复代价最小的方案,而忽略了数据集的其他属性以及这些属性与函数依赖包含属性之间的相关性.为此,提出一种基于可能世界模型的不一致性修复方法.它首先构造可能的修复方案,然后从修复代价和属性值相关性两个方面量化各个候选修复方案的可信性程度,并最后找出最优的修复方案.实验结果验证了所提出的修复方法取得了比现有基于代价的修复方法更好的修复效果.同时也分析了错误率和不同类型概率量化对所提出的修复方法的影响.
Abstract:Various techniques have been proposed to repair inconsistent relational data that violate functional dependencies by optimizing the repair plan by the metric of repair cost. However, they may fall short in the circumstances where the erroneous data occurs in the left-hand side of a functional dependency or repair cost is not a reliable optimization indicator. In this paper, a novel repairing approach based on possible world model is proposed. It first constructs candidate repair plans and then estimates their possible world probabilities. The possible world probabilities are measured by quantifying both repair cost and candidate value appropriateness with regard to other related attribute values presented in relational data. Finally, extensive experiments on synthetic datasets show that the proposed approach performs considerably better than the cost-based approach on repair quality.
文章编号:     中图分类号:    文献标志码:
基金项目:国家重点基础研究发展计划(973)(2012CB316203);国家自然科学基金(61332006,61472321,61502390);西北工业大学基础研究基金(3102014JSJ0013,3102014JSJ0005) 国家重点基础研究发展计划(973)(2012CB316203);国家自然科学基金(61332006,61472321,61502390);西北工业大学基础研究基金(3102014JSJ0013,3102014JSJ0005)
Foundation items:National Basic Research Program of China (973) (2012CB316203); National Natural Science Foundation of China (61332006, 61472321, 61502390); Northwestern Polytechnical University Foundation for Fundamental Research (3102014JSJ0013, 3102014JSJ0005)
Reference text:

徐耀丽,李战怀,陈群,钟评.基于可能世界模型的关系数据不一致性的修复.软件学报,2016,27(7):1685-1699

XU Yao-Li,LI Zhan-Huai,CHEN Qun,ZHONG Ping.Repairing Inconsistent Relational Data Based on Possible World Model.Journal of Software,2016,27(7):1685-1699