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1A centrality measure based on spectral optimization of modularity density显示文摘Centrality analysis has been shown to be a valuable method for the structural analysis of complex networks.It is used to identify key elements within networks and to rank network elements such that experiments can be tailored to interesting candidates.In this paper,we show that the optimization process of modularity density can be written in terms of the eigenspectrum of kernel matrix.Based on the eigenvectors belonging to the largest eigenvalue of kernel matrix,we present a new centrality measure that characterizes the contribution of each node to its assigned community in a network,called modularity density centrality.The measure is illustrated and compared with the standard centrality measures by using respectively an artificial example and a classic network data set.The statistical distribution of modularity density centrality is investigated by considering large computer generated graphs and two large networks from the real world.Experimental results show the significance of the proposed approach.FU LiDong GAO Lin MA XiaoKe 2010Science China(Information Sciences)2010,53,9:6
2数据网格中服务质量感知的副本放置方法显示文摘可靠的服务质量是数据网格应用的关键因素之一.服务质量感知的副本放置问题在传统模型中加入个体服务质量约束,可满足QoS严格的数据网格应用需求.针对现有副本放置算法不支持多属性约束、可扩展性不高等缺点,提出一种基于矩阵操作加速的3阶段副本放置算法TP-GABMAC算法,并引入副本环处理副本更新和一致性维护问题.分析和实验表明,TP-GABMAC算法具有稳定性好和可扩展性强的特点,在多种网络拓扑、访问模式和负载条件下均能获得合理的副本策略.肖侬 付伟 卢锡城 2009中国科学(F辑:信息科学)2009,39,10:6
3智能客户端架构下的偶尔连接研究与应用显示文摘通过研究面向服务偶尔连接的智能客户端架构、数据缓存、数据管理等偶尔连接涉及的关键技术,并通过应用于福建省工人考核管理系统,分析.NET平台下智能客户端的偶尔连接具体设计,其中重点阐述工人考核管理系统中智能客户端的体系结构设计、联机和脱机模式设计及联机/脱机状态测试设计。最后通过测试数据表明,采用面向服务的智能客户端结构及相应的偶尔连接实现技术,工人考核管理系统实现了安全可靠、易部署、可离线工作、使用简单等特性。饶绪黎 2012贵州师范学院学报2012,28,9:1
4QoS-awared replica placement techniques in data grid applications显示文摘Quality of service is one of the most important factors for successful grid applications. However, individual QoS constraint (IQC) and QoS-awared replica placement have not yet been well addressed in the existing data grid. Existing QoS-awared replica placement algorithms neither can support multiple QoS attributes, nor have good scalability. In this paper, a three-phrase QoS-awared replica placement algorithm based on matrix, namely TP-GABMAC, is presented to solve these problems. Furthermore, a replica ring mechanism is introduced to maintain replica consistency and manage update conflicting. Experiments and analysis demonstrate that the proposed algorithms are not only stable and scalable, but also work well under different network topologies, access patterns and workloads.XIAO Nong, FU Wei & LU XiCheng School of Computer, National University of Defense Technology, Changsha 410073, China 2010Science China(Information Sciences)2010,53,8:1
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