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提高MINIX2.0文件属性信息的访问效率
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作者 赵虹 朱望规 《微机发展》 2003年第9期71-73,77,共4页
提高文件属性信息的访问速度可以有效地提高文件系统的性能。由于磁盘存取速度始终落后于处理器和内存速度,近年来许多研究都致力于如何提高文件属性信息在内存中的访问效率。许多实际运行的操作系统(包括GNU/Linux)通常都是使用基于LR... 提高文件属性信息的访问速度可以有效地提高文件系统的性能。由于磁盘存取速度始终落后于处理器和内存速度,近年来许多研究都致力于如何提高文件属性信息在内存中的访问效率。许多实际运行的操作系统(包括GNU/Linux)通常都是使用基于LRU淘汰策略或LFU淘汰策略的一级链表结构来管理文件属性的内存信息。文中通过建立一个二级链表结构(称之为LRU-LFU链表),并采用LRU-LFU淘汰算法(此算法集成了SimpleLRU淘汰算法和LFU淘汰算法)来实现MINIX2.0文件系统对文件属性信息在内存中的管理。研究结果表明,综合执行效率和访问命中率两个因素,基于LRU-LFU淘汰算法的LRU-LFU链表管理策略是提高MINIX2.0文件系统文件属性信息访问效率的较为理想的管理策略。 展开更多
关键词 操作系统 文件系统 访问效率 文件属性信息 MINIX2.0
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User Identification Based on Multiple Attribute Decision Making in Social Networks 被引量:4
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作者 叶娜 张银亮 +3 位作者 董丽丽 边根庆 Enjie LIU Gordon J.Clapworthy 《China Communications》 SCIE CSCD 2013年第12期37-49,共13页
Social networks are becoming increasingly popular and influential,and users are frequently registered on multiple networks simultaneously,in many cases leaving large quantities of personal information on each network.... Social networks are becoming increasingly popular and influential,and users are frequently registered on multiple networks simultaneously,in many cases leaving large quantities of personal information on each network.There is also a trend towards the personalization of web applications;to do this,the applications need to acquire information about the particular user.To maximise the use of the various sets of user information distributed on the web,this paper proposes a method to support the reuse and sharing of user profiles by different applications,and is based on user profile integration.To realize this goal,the initial task is user identification,and this forms the focus of the current paper.A new user identification method based on Multiple Attribute Decision Making(MADM) is described in which a subjective weight-directed objective weighting,which is obtained from the Similarity Weight method,is proposed to determine the relative weights of the common properties.Attribute Synthetic Evaluation is used to determine the equivalence of users.Experimental results show that the method is both feasible and effective despite the incompleteness of the candidate user dataset. 展开更多
关键词 weighted algorithm fuzzy match-ing cooperative communication network con-vergence heterogeneous networks
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