国家自然科学基金(61170085)

作品数:3被引量:3H指数:1
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相关机构:华东师范大学更多>>
相关期刊:《华东师范大学学报(自然科学版)》《Frontiers of Computer Science》《Journal of Shanghai Jiaotong university(Science)》更多>>
相关主题:窗口函数IMPOSTGRESQL函数优化技术更多>>
相关领域:自动化与计算机技术更多>>
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IM^2:一种改进的MIN/MAX窗口函数优化技术被引量:2
《华东师范大学学报(自然科学版)》2018年第1期103-116,共14页宋光旋 赵大鹏 王晓玲 
国家自然科学基金(61170085,61472141);上海市重点学科建设项目(B412);上海市可信物联网软件协同创新中心项目(ZF1213)
窗口函数作为一种分析型的OLAP函数加入SQL(Structured Query Language)标准已有十多年,而且随着分析型应用需求的增长窗口函数有着越来越广泛的应用前景.窗口函数的语法非常简单,却可以表达诸如rank、moving average、cumulative sum...
关键词:window函数 MIN/MAX 执行优化 POSTGRESQL 
Optimizing top-k retrieval: submodularity analysis and search strategies被引量:1
《Frontiers of Computer Science》2016年第3期477-487,共11页Chaofeng SHA Keqiang WANG Dell ZHANG Xiaoling WANG Aoying ZHOU 
This work was supported by the National Natural Science Foundation of China (Grant Nos. 61572135 and 61170085), 973 project (2010CB328106), Program for New Century Excellent Talents in China (NCET-10-0388).
The key issue in top-k retrieval, finding a set of k documents (from a large document collection) that can best answer a user's query, is to strike the optimal balance between relevance and diversity. In this paper...
关键词:top-k retrieval DIVERSIFICATION submodular function maximization 
Numeric-Based XML Labeling Schema by Generalized Dynamic Method
《Journal of Shanghai Jiaotong university(Science)》2012年第2期203-208,共6页倪叶峰 范远超 谈昕澄 崔锦 王晓玲 
the National Major Projects on Science and Technology(No.2010ZX01042-002-003-004);the National Basic Research Program (973) of China(No.2010CB328106);the National Natural Science Foundation of China(No. 61170085);the Program for New Century Excellent Talents in China(No.NCET-10-0388);the Shanghai Leading Academic Discipline Project(No.B412)
Most efficient indeces and query techniques over XML (extensible markup language) data are based on a certain labeling scheme, which can quickly determine ancestor-descendant and parent-child relationship between tw...
关键词:dynamic labeling scheme compact dynamic binary string (CDBS) vector encoding 
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