不同语义环境下“小众专家”群体“稳定-变化”特征分析——基于MetaFilter的实证分析  

The Analysis of Niche Experts' “Stability-Change”Feature Under Different Semantic Environments:An Empirical Analysis Based on MetaFilter Dataset

作　　者：李纲[1] 张岩[1] 叶光辉[2] 

机构地区：[1]武汉大学信息资源研究中心,武汉430072 [2]华中师范大学信息管理学院,武汉430079

出　　处：《图书情报工作》2017年第2期99-106,共8页Library and Information Service

基　　金：国家社会科学基金重大项目“智慧城市应急决策情报体系建设研究”(项目编号:13&ZD173);中央高校基本科研业务费项目“面向应急决策的专家发现与意见融合研究”(项目编号:CCNU16A05044)研究成果之一

摘　　要：[目的 /意义]社交媒介不仅提供了用户间知识交流的平台,而且形成了知识复用的渠道。一部分社交网络用户在信息传播、知识共享等方面都能够对其他用户产生影响,称之为"小众专家"。对"小众专家"群体的研究对于社交网络中信息传播具有促进作用。[方法 /过程]以MetaFilter数据集为例,利用用户社交网络活动数据,生成用户关系网络,结合网络分析与时序分析筛选"小众专家",分析"小众专家"群体在不同语义环境下的"稳定-迁移"特征,并提出评测指标,进行验证分析。[结果 /结论]结果显示:只有极少部分"小众专家"能够在多种语义环境下保持稳定性,而大部分"小众专家"只能在单一语义环境中保持稳定性。[ Purpose/significance] Social media not only provides a platform for knowledge exchange for users, but also forms a channel for knowledge reuse. Some social network users can affect others in information communication and knowledge sharing. These users are called ＂niche experts＂. The study of ＂niche experts＂ helps to promote information dissemination. [ Method/process] In this paper, the authors made use of user activity data from a popular community weblog named MetaFilter to construct social network. Then the authors got the niche experts by network analysis and time series analysis and analyzed the ＂stability-change＂ feature of niche experts under different semantic circumstances. The paper also introduced an index to measure this feature and it was proved to be correct. [ Result/conclusion ] The result of the study shows that only few niche experts can maintain stability under multiple semantic circumstances and the majority of niche experts can maintain stability only under single semantic circumstance.

关 键 词：小众专家 社会语义网 语义环境 角色迁移 

分 类 号：TP391.1[自动化与计算机技术—计算机应用技术]