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带学习的同步隐私保护频繁模式挖掘 被引量:4
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作者 郭宇红 童云海 +1 位作者 唐世渭 吴冷冬 《软件学报》 EI CSCD 北大核心 2011年第8期1749-1760,共12页
为了提高挖掘结果的准确性,提出基于样例学习和项集同步随机化的隐私保护频繁模式挖掘方法(learning and synchronized privacy preserving frequent pattern mining,简称LS-PPFM).该方法充分利用不需要隐私保护的个体数据,首先对不需... 为了提高挖掘结果的准确性,提出基于样例学习和项集同步随机化的隐私保护频繁模式挖掘方法(learning and synchronized privacy preserving frequent pattern mining,简称LS-PPFM).该方法充分利用不需要隐私保护的个体数据,首先对不需要保护的数据学习,得到样例数据中蕴涵的强关联项,然后在对数据随机化时,将强关联项绑定在一起作同步随机化变换,以保持项与项之间的潜在关联性.实验结果表明,相对于项独立随机化,LS-PPFM能够在略微牺牲一定的隐私保护性的情况下,显著提高频繁模式挖掘结果的准确性. 展开更多
关键词 有指导的 基于学习的 随机化 隐私保护 频繁模式挖掘
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Survey of Large-Scale Data Management Systems for Big Data Applications 被引量:4
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作者 吴冷冬 袁立言 犹嘉槐 《Journal of Computer Science & Technology》 SCIE EI CSCD 2015年第1期163-183,共21页
Today, data is flowing into various organizations at an unprecedented scale. The ability to scale out for processing an enhanced workload has become an important factor for the proliferation and popularization of data... Today, data is flowing into various organizations at an unprecedented scale. The ability to scale out for processing an enhanced workload has become an important factor for the proliferation and popularization of database systems. Big data applications demand and consequently lead to the developments of diverse large-scale data management systems in different organizations, ranging from traditional database vendors to new emerging Internet-based enterprises. In this survey, we investigate, characterize, and analyze the large-scale data management systems in depth and develop comprehensive taxonomies for various critical aspects covering the data model, the system architecture, and the consistency model. We map the prevailing highly scalable data management systems to the proposed taxonomies, not only to classify the common techniques but also to provide a basis for analyzing current system scalability limitations. To overcome these limitations, we predicate and highlight the possible principles that future efforts need to be undertaken for the next generation large-scale data management systems. 展开更多
关键词 data model system architecture consistency model SCALABILITY
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