共查询到19条相似文献,搜索用时 171 毫秒
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本文通过社会网络分析方法识别网络社区中的意见领袖.首先对意见领袖存在的人际关系网络结构特征进行分析,对比论坛、博客和问答网络之间的区别,提出基于无向、有权重网络模型更能真实准确地识别意见领袖.并基于该网络模型研究和分析了网络论坛结构特征,通过测量其小世界和无标度的复杂网络特征,定量分析意见领袖存在的社会性根源.其次提出... 相似文献
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随着Web2.0技术的发展,微博网络已成为当前互联网中非常流行的网络应用,以即时性、碎片化、聚合性为特点的信息传播特性受到广大用户的欢迎。意见领袖在信息传播过程中发挥了重要的推动作用,有效地识别网络意见领袖,对于提高信息传播效果和可控性具有重要的现实意义。根据微博网络特点,提出一种基于多重链接的微博网络节点权重计算方法,根据节点权重计算结果并排序来识别意见领袖。采用T-Test、Kendall-tau和Spareman Rank三种统计学检验标准对不同的意见领袖识别算法进行对比实验,同时还对算法的准确率和召回率以及计算时间进行了实验。实验结果表明,从意见领袖识别能力、准确率和召回率以及计算时间等综合指标来看,该方法更具优势。 相似文献
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使用微博用户互动数据构建的社交时序网络,通过用户互动强度优化权重分配改进PageRank算法,计算网络快照中各节点影响力,引入网络快照的记忆效应参数,得到动态的意见领袖识别算法。F-Measure值的对比实验结果表明,该算法的准确率优于PageRank算法、HITS算法;记忆效应衰减率的不同取值对该意见领袖动态识别算法准确率有显著影响,为网络舆情的动态监管提供了一种方法和手段。 相似文献
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网络舆论形成过程中,其走向很大程度上受到意见领袖的影响.由于网络舆论的影响力不断增大,国内外学者也开始把研究重点放在网络论坛意见领袖上.从论坛帖子数据中提取回复关系,映射为发帖者和回帖者之间的关联关系,从而构造出一个社群网络.某个体的入度说明其被关注的程度,局部中心度直观地反映出与某个体直接联系的个体数目.基于入度和局部中心度的思想,并分析个体之间的交互行为,提出一种在线论坛的意见领袖发现算法.以某论坛为实验对象,找出其中的意见领袖,并通过分析实验结果验证文中算法的正确性 相似文献
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意见领袖在网络舆情形成过程中作用显著,如何从海量评论中挖掘意见领袖具有重要的现实意义.综合运用网络爬虫、正文抽取、文本倾向性分析、影响力计算、网络可视化等信息处理技术,设计并实现了网络论坛意见领袖自动挖掘系统.实际运行结果表明,该系统具有识别结果准确、效率高、健壮性强的特点. 相似文献
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意见领袖是社交网络和社交媒体中的重要节点,是信息传播的关键性因素。在QQ群聊天中由于参与用户较多,各种话题比较繁杂,因此识别其中的意见领袖比较困难。基于此提出一种基于应答关系来挖掘QQ群中意见领袖的方法,该方法首先构建回应词词库,然后基于Aho-Corasick算法来匹配聊天文本中的回应词数据,构建出用户应答关系的网络结构,最后使用社交网络中重要节点识别的方法来发现意见领袖。该方法对QQ群中的意见领袖发现具有较高的准确率,在融合QQ群用户交互社交网络的节点重要性特征后,能够达到更好的意见领袖发现效果。 相似文献
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Opinion leaders in online social networks are important for various fields such as public opinion propagation, marketing management, administrative science and even politics. There are often many kinds of relationships in an online social network. Detecting and identifying opinion leaders depending on any one kind of relationship is inaccurate. In this paper, node importance analysis in multi-relationship online social networks was proposed by signalling based on Multi-subnet Composited Complex Networks Model, and considering the characteristics of multiple relationships which would interrelate with each other. Through node importance under multiple relationships, the novel opinion leader detecting algorithm in multi-relationship online social networks is proposed and approved to be efficient by experiments described in this paper. 相似文献
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虚拟学习社区是传统教育突破空间资源限制形成的便捷性学习环境,其中意见领袖是构成社区信息通路的重要角色,对其他用户有强大的影响力。为了准确识别社区中的意见领袖,构建出虚拟学习社区网络,分析各用户的中心性和社会网络角色特征,选取入度、出度、介数、特征向量中心性、用户活跃度、用户帖子转发量、用户帖子评论量等七个特征值作为筛选条件,结合基于K-means的用户聚类算法,提出基于K-means算法的意见领袖识别模型。最后,将该识别模型应用于某虚拟社区,根据各个聚类子类的特征向量,提取理论意义上的意见领袖集合。实验证明,获取意见领袖集合具有很高的准确性,识别出的意见领袖均处于中心者或桥梁位置,占据着社会网络的优势位置,在虚拟社区中承担着核心或中介等特殊作用。 相似文献
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Our many various relationships with persons from home, work and school give rise to our social networks. In a social network, people receive, provide, and pass a great deal of information. In this process, we often observe that certain individuals have especially strong influences on others. We call these highly influential people opinion leaders. Since the late 20th century, the number of Internet users has increased rapidly, and a huge number of people now interact with each other in online social networks. In this way, the Web community has become similar to real-world society. Internet users receive information not only from the mass media, but also from opinion leaders. For example, online articles posted by influential bloggers are often used as marketing tools or political advertisements, due to their huge influence on other users. Therefore, it is important and useful to identify the influential users in an online society. We thus propose a simple yet reliable algorithm that identifies opinion leaders in a cyber social network. In this paper, we first describe our algorithm for identifying influential users in an online society. We then demonstrate the validity of the selection of representative reviewers using the Yahoo! music and GroupLens movie databases and performing 10-fold cross-validation and z-tests. 相似文献
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当前的影响力分析算法大多基于网络拓扑结构或用户交互信息,然而单一方面的方法会使挖掘结果出现较大的偏差,目前缺乏全面准确的影响力挖掘方法。本文通过对传统PageRank算法进行扩展,提出一种面向新浪微博的基于用户交互度连接属性的TCRank算法;其次设计了3种微博意见领袖特征指标,并对其加权求和用于意见领袖候选集的精化操作;同时提出一种基于卷积神经网络模型的情感支持度的意见领袖抽取算法,对意见领袖候选集进行最终排名。最后,通过实验验证所提出算法的有效性。 相似文献
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意见领袖挖掘是社会网络研究的重要课题,对于舆情控制、信息传播等方面具有重要意义。LeaderRank算法是一个有效的意见领袖挖掘算法。为提高LeaderRank算法的准确性和抗干扰能力,在LeaderRank算法基础上,加入用户之间的情感倾向、用户活跃程度,提出了改进的LeaderRank算法。基于SIR模型的实验验证表明,改进算法的准确性和抗干扰能力均得到了有效提升。 相似文献
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在线社交网络中的意见领袖通常是指在社交网络的信息传播中具有较大社会影响力的个体。针对当前意见领袖挖掘方法中只考虑社交网络的拓扑结构和节点的个体属性,缺乏信息传播中交互特征的问题,该文提出了基于扩展独立级联模型,并融入网络结构特征、个体属性和行为特征的意见领袖挖掘模型(extended independent cascade, EIC)。该模型以个体属性、个体在信息传播过程中的交互行为建立加权的传播网络,利用改进的CELF(cost effective lazy forward)算法,挖掘网络中影响力较大的个体。通过实验验证,在意见领袖的扩展核心率指标上,该算法优于拓扑结构类算法,且具有较好的稳定性,同时并未降低意见领袖的传播范围。 相似文献
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Carolin Kaiser Johannes Kröckel Freimut Bodendorf 《Information Systems and E-Business Management》2013,11(4):597-621
An increasing number of people are joining online social networks. By interacting with each other, network members influence one another’s opinion. These influencing effects can be utilized by marketing. A wave of influence can be triggered by addressing only a few opinion leaders in the network. Targeting the right opinion leaders is a big challenge. This paper presents a new approach which simulates the spread of opinions when influencing certain opinion leaders. In contrast to other approaches, the influencing effects are not assumed but revealed by real data. The principles of opinion formation are detected by ant mining algorithms before they are applied to simulate the spread of opinions. The approach is applied to an online gaming community and provides valuable insights for marketing. 相似文献
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Although topic detection and tracking techniques have made great progress, most of the researchers seldom pay more attention to the following two aspects. First, the construction of a topic model does not take the characteristics of different topics into consideration. Second, the factors that determine the formation and development of hot topics are not further analyzed. In order to correctly extract news blog hot topics, the paper views the above problems in a new perspective based on the W2T (Wisdom Web of Things) methodology, in which the characteristics of blog users, context of topic propagation and information granularity are investigated in a unified way. The motivations and features of blog users are first analyzed to understand the characteristics of news blog topics. Then the context of topic propagation is decomposed into the blog community, topic network and opinion network, respectively. Some important factors such as the user behavior pattern, opinion leader and network opinion are identified to track the development trends of news blog topics. Moreover, a blog hot topic detection algorithm is proposed, in which news blog hot topics are identified by measuring the duration, topic novelty, attention degree of users and topic growth. Experimental results show that the proposed method is feasible and effective. These results are also useful for further studying the formation mechanism of opinion leaders in blogspace. 相似文献