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1.
《Information processing & management》2023,60(3):103278
Predicting information cascade popularity is a fundamental problem in social networks. Capturing temporal attributes and cascade role information (e.g., cascade graphs and cascade sequences) is necessary for understanding the information cascade. Current methods rarely focus on unifying this information for popularity predictions, which prevents them from effectively modeling the full properties of cascades to achieve satisfactory prediction performances. In this paper, we propose an explicit Time embedding based Cascade Attention Network (TCAN) as a novel popularity prediction architecture for large-scale information networks. TCAN integrates temporal attributes (i.e., periodicity, linearity, and non-linear scaling) into node features via a general time embedding approach (TE), and then employs a cascade graph attention encoder (CGAT) and a cascade sequence attention encoder (CSAT) to fully learn the representation of cascade graphs and cascade sequences. We use two real-world datasets (i.e., Weibo and APS) with tens of thousands of cascade samples to validate our methods. Experimental results show that TCAN obtains mean logarithm squared errors of 2.007 and 1.201 and running times of 1.76 h and 0.15 h on both datasets, respectively. Furthermore, TCAN outperforms other representative baselines by 10.4%, 3.8%, and 10.4% in terms of MSLE, MAE, and R-squared on average while maintaining good interpretability. 相似文献
2.
本文以新浪微博平台为数据采集平台, 对微博信息传播的影响因素和效果进行数据分析, 在借鉴信息传播四要素和流行三要素的基础上, 总结出了影响微博信息传播的16个因素。首先通过对“风云人气榜”上随机抓取的320个新浪微博用户数据进行多元线性回归预测, 实证得到粉丝数、工作时间和发布时间对微博信息传递有促进作用, 而活跃度、休息时间和日期对信息传播有阻碍作用;然后利用爬取数据中提取的441 005个转发样本, 通过逻辑回归、朴素贝叶斯和贝叶斯网络的概率模型分析, 实证了社交类型对用户微博转发行为的影响最为显著, 微博社交需求显著高于内容需求, 并且根据ROC曲线得出综合类型对用户微博转发行为的预测最为精准。 相似文献
3.
基于微博客的竞争情报搜集研究:以新浪微博为例 总被引：1，自引：0，他引：1
微博客的出现给竞争情报搜集工作提供了新的信息源。国内微博客产品发展迅速,本文选取新浪微博客为研究环境,分析了其独特的信息架构和信息传播模式,认为竞争情报工作者可以通过关注竞争对手、TAG标签、App应用、内容搜索、内容订阅、人际情报网络等六种方法和工具在微博客环境下有效地开展情报搜集工作,并结合实际案例分别对这些方法和工具进行了说明。本文对于竞争情报工作者在新浪微博客这一新型信息源中开展情报搜集活动有一定的指导意义。 相似文献
4.
Bernard J. Jansen 《Information processing & management》2018,54(2):159-174
With the noted popularity of social networking sites, people increasingly rely on these social networks to address their information needs. Although social question and answering is potentially an important venue seeking information online, it, unfortunately, suffers from a problem of low response rate, with the majority of questions receiving no response. To understand why the response rate of social question and answering is low and hopefully to increase it in the future, this research analyzes extrinsic factors that may influence the response probability of questions posted on Sina Weibo. We propose 17 influential factors from 2 different perspectives: the content of the question, and the characteristics of the questioner. We also train a prediction model to forecast a question's likelihood of being responded based on the proposed features We test our predictive model on more than 60,000 real-world questions posted on Weibo, which generate more than 600,000 responses. Findings show that a Weibo's question answerability is primarily contingent on the questioner versus the question. Our findings indicate that using appreciation emojis can increase a question's response probability, whereas the use of hashtags negatively influences the chances of receiving answers. Our contribution is in providing insights for the design and development of future social question and answering tools, as well as for enhancing social network users’ collaboration in supporting social information seeking activities. 相似文献
5.
《Information processing & management》2019,56(4):1457-1467
In the social media environment, rumors are constantly breeding and rapidly spreading, which has become a severe social problem, often leading to serious consequences (e.g., social panic and even chaos). Therefore, how to identify rumors quickly and accurately has become a key prerequisite for taking effective measures to curb the spread of rumors and reduce their influence. However, most existing studies employ machine learning based methods to carry out automatic rumor identification by extracting features of rumor contents, posters, and static spreading processes (e.g., follow-ups, thumb-ups, etc.) or by learning the presentation of forwarding contents. These studies fail to take into account the dynamic differences between the spreaders and diffusion structures of rumors and non-rumors. To fill this gap, this paper proposes Long Short-Term Memory (LSTM) network based models for identifying rumors by capturing the dynamic changes of forwarding contents, spreaders and diffusion structures of the whole (in the afterwards identification mode) or only the beginning part (in the halfway identification mode, i.e., early rumor identification) of the spreading process. Experiments conducted on a rumor and non-rumor dataset from Sina Weibo show that the proposed models perform better than existing baselines. 相似文献
6.
《Information processing & management》2022,59(5):103063
In recent years, fake news detection has been a significant task attracting much attention. However, most current approaches utilize the features from a single modality, such as text or image, while the comprehensive fusion between features of different modalities has been ignored. To deal with the above problem, we propose a novel model named Bidirectional Cross-Modal Fusion (BCMF), which comprehensively integrates the textual and visual representations in a bidirectional manner. Specifically, the proposed model is decomposed into four submodules, i.e., the input embedding, the image2text fusion, the text2image fusion, and the prediction module. We conduct intensive experiments on four real-world datasets, i.e., Weibo, Twitter, Politi, and Gossip. The results show 2.2, 2.5, 4.9, and 3.1 percentage points of improvements in classification accuracy compared to the state-of-the-art methods on Weibo, Twitter, Politi, and Gossip, respectively. The experimental results suggest that the proposed model could better capture integrated information of different modalities and has high generalizability among different datasets. Further experiments suggest that the bidirectional fusions, the number of multi-attention heads, and the aggregating function could impact the performance of the cross-modal fake news detection. The research sheds light on the role of bidirectional cross-modal fusion in leveraging multi-modal information to improve the effect of fake news detection. 相似文献
7.
基于SNS的图书馆信息承载策略研究——以4种社交网络工具为例 总被引：1，自引：0，他引：1
本文通过文献调研和网站调研发现,在"人人、新浪微博、豆瓣和微信"这4类社交网络上的图书馆用户数量较多,且读者活跃度较高。本文通过分析这4类社交网络的用户体验、搜索效果、信息传播的特点,以期得出"信息——载体"两者的主要匹配关系,为图书馆信息收集和发布提供一些参考和借鉴。 相似文献
8.
《Information processing & management》2020,57(2):102031
Social media platforms allow users to express their opinions towards various topics online. Oftentimes, users’ opinions are not static, but might be changed over time due to the influences from their neighbors in social networks or updated based on arguments encountered that undermine their beliefs. In this paper, we propose to use a Recurrent Neural Network (RNN) to model each user’s posting behaviors on Twitter and incorporate their neighbors’ topic-associated context as attention signals using an attention mechanism for user-level stance prediction. Moreover, our proposed model operates in an online setting in that its parameters are continuously updated with the Twitter stream data and can be used to predict user’s topic-dependent stance. Detailed evaluation on two Twitter datasets, related to Brexit and US General Election, justifies the superior performance of our neural opinion dynamics model over both static and dynamic alternatives for user-level stance prediction. 相似文献
9.
基于主题细分的社交网络用户间交互特征分析 总被引：1，自引：0，他引：1
[目的/意义]针对一微博子网,从主题细分的角度对用户间历史交互记录进行研究,发现用户间交互的主题偏好特征,以期从微观层面了解用户信息传播行为的规律。[方法/过程]通过用户实例分析得出对用户间交互进行主题细分的必要性;利用主题模型(LDA)对用户间历史交互记录进行主题细分,采用多维向量表示用户间在不同主题下的交互强度;通过统计分析和网络分析方法探索用户间交互的主题特征。[结果/结论]各主题下用户间交互强度的分布具有长尾特征;用户间的交互内容在时序上具有主题相关性;基于多维的用户间交互强度,可抽取出特定主题下的用户交互子网。用户间交互在时序上具有主题相关性这一特征,以及特定主题的用户交互子网,可用于对特定主题的信息传播进行监控和预测。 相似文献
10.
[目的/意义]改革开放成为当代中国多元社会思潮交汇和引发公众追忆的热点事件,基于“大江大河”网络舆论考察热点事件网络舆论形成的机制与舆论场融合新模式。[方法/过程]将抓取的584条新浪微博精华帖作为扎根理论分析的经验资料,实施开放式编码、轴向编码和选择性编码等三个编码过程,进行自下而上的理论建构。[结果/结论]研究发现,微博互动中的剧情评价、追星推剧、情感共鸣三者的互相作用形成了微博舆论场的社会心理机制,多元主体将剧情发展与身份角色、生命历程和情感体验融为一体,促使产生社会共情效应。追求社会共情是理解舆论场融合的新视角,积极联结起主流意识与公众主体,打通社会舆论场内部的壁垒与隔阂,形成社会凝聚的有效机制。 相似文献
11.
随着现代网络的发展,登录移动社交平台已经成为大多数人每天的日常,和亲人朋友在社交平台上的交流远远多于面对面的交谈,学习工作上的事情也大多可以用社交软件完成,在这样的大前提下,移动社交平台用户之间的信任关系必然要成为关注的重点。用户信任度可以用来详细检查用户之间所有可能的社交网络关系,本文以新浪微博为例提供了一种计算用户之间信任的方法,通过对用户之间的信任进行分析完成相应的推荐和其他服务。 相似文献
12.
【 目的/意义】微博转发行为是公众参与监管突发事件网络舆情的重要渠道,科学合理的监管与引导对突发
事件精准预警和快速响应具有重要意义。【方法/过程】针对突发事件的微博转发行为未充分考虑转发者个体差异
的不足,借助UTAUT模型,结合动机理论,引入类型偏好、信源偏好、转发动机三个变量,构建面向突发事件的微博
用户转发行为的影响因素模型。以新浪微博为例,通过设计问卷、分析问卷数据验证构建影响因素模型有效性,对
影响因素模型进行拟合检验。【结果/结论】实证结果表明努力期望、社群影响、信源偏好、感知成本对转发意愿的路
径的CR值均大于1.96,即对转发意愿有正向影响作用;转发意愿对转发行为的路径的CR值大于1.96,即对转发行
为有正向影响作用,从政府部门、相关媒介和公众等方面提出加强微博转发监管的建议。【创新/局限】深入研究了
面向突发事件的微博用户转发行为,但调查对象不够广泛,数据分析还存在一定的局限性。 相似文献
13.
《Information processing & management》2022,59(6):103059
With the popularity of social platforms such as Sina Weibo, Tweet, etc., a large number of public events spread rapidly on social networks and huge amount of textual data are generated along with the discussion of netizens. Social text clustering has become one of the most critical methods to help people find relevant information and provides quality data for subsequent timely public opinion analysis. Most existing neural clustering methods rely on manual labeling of training sets and take a long time in the learning process. Due to the explosiveness and the large-scale of social media data, it is a challenge for social text data clustering to satisfy the timeliness demand of users. This paper proposes a novel unsupervised event-oriented graph clustering framework (EGC), which can achieve efficient clustering performance on large-scale datasets with less time overhead and does not require any labeled data. Specifically, EGC first mines the potential relations existing in social text data and transforms the textual data of social media into an event-oriented graph by taking advantage of graph structure for complex relations representation. Secondly, EGC uses a keyword-based local importance method to accurately measure the weights of relations in event-oriented graph. Finally, a bidirectional depth-first clustering algorithm based on the interrelations is proposed to cluster the nodes in event-oriented graph. By projecting the relations of the graph into a smaller domain, EGC achieves fast convergence. The experimental results show that the clustering performance of EGC on the Weibo dataset reaches 0.926 (NMI), 0.926 (AMI), 0.866 (ARI), which are 13%–30% higher than other clustering methods. In addition, the average query time of EGC clustered data is 16.7ms, which is 90% less than the original data. 相似文献
14.
【目的/意义】随着移动互联网的发展,微博的普及进一步加速了社会突发事件的传播。转发作为最重要的用户信息行为,在很大程度上预示了网络舆情的发展趋势。但是,鲜有研究关注微博内容中的心理语言使用与转发行为的关系。本研究拓展了心理语言学在社会突发事件情境下的应用领域,为政府或企业应急管理部门有效引导网络舆情提供了实践启示。【方法/过程】本文以九寨沟地震事件为例,基于LIWC文本分析工具研究了微博用户心理过程对于转发行为的影响,通过构建VAR向量自回归模型并进行格兰杰因果检验,确定了微博转发行为的心理语言影响因素,并进一步运用脉冲响应函数对转发行为进行了动态分析。【结果/结论】根据实证研究的结果,社会过程词和情感历程词对微博用户的转发行为具有一定的预测作用。 相似文献
15.
【目的/意义】网络舆情是群体智慧的涌现形式之一,探究不同平台的网络舆情信息所蕴含的群体智慧,对
网络舆情的管理与引导具有重要的理论价值与现实意义。【方法/过程】研究以新浪微博和抖音短视频为数据源,基
于ELECTRA和REDP方法分别对舆情文本信息进行实体抽取与关系抽取,分别构建微博平台与短视频平台的网
络舆情知识图谱,并对各网络舆情知识图谱进行对比分析。【结果/结论】研究结果表明,微博与短视频平台的舆情
信息通常会涉及相同的主流内容,同时各平台也存在不同的衍生内容。在信息内容方面,新浪微博平台的舆情信
息的内涵更加丰富、外延更加广泛。在知识的贡献与获取方面,新浪微博平台的用户更加偏向于参与舆情话题的
讨论,主动贡献知识。在知识图谱构建方面,短视频平台舆情内容中的知识实体同时出现的联合概率较高,更容易
形成知识三元组,舆情知识也更加聚焦。【创新/局限】本研究分别构建了新浪微博与抖音短视频平台的舆情知识图
谱,并对各平台知识图谱进行对比分析。在未来的研究中,研究将对各平台知识图谱差异性的产生过程与原因进
行更加深入地思考。 相似文献
16.
《Information processing & management》2020,57(2):102177
The transmission of online emergency information has become an active means of expressing public opinion and has vitally affected societal emergency response techniques. This paper analyzes interactions between three groups in time and space using a classic SIR (susceptible, infected, and recovered) epidemic model. Through social network theory and analog simulation analysis, we utilize data from China's Sina Weibo (a popular social media platform) to conduct empirical research on 101 major incidents in China that occurred between 2010 and 2017. We divide these emergencies into four types—natural disasters, accidents, public health events, and social security events—and conduct a simulation using three examples from each group. The results show that government control of public opinion is both cheaper and more effective when it occurs at the initial stages of an incident. By cooperating with the government, the media can facilitate emergency management. Finally, if netizens trust the government and the media, they are more likely to make cooperative decisions, maintain interest, and improve the management of online public sentiment. 相似文献
17.
【目的/意义】研究分析了突发公共卫生事件演化过程中社交媒体虚假信息的产生及时滞性扩散特征,试图
揭示虚假信息以及负面情感之间的相关关系,为疏通正确的防疫信息与民众之间的沟通渠道提供帮助。【方法/过
程】研究爬取了新冠疫情期间的虚假信息及疫情相关的微博数据,利用自动文本分析方法分析虚假信息的主题分
布;然后结合时间线索和格兰杰因果分析,展示了虚假信息相关主题微博的时滞性扩散特点;最后,分析了不同主
题下虚假信息、相关微博和负面情感三者的关系。【结果/结论】虚假信息与疫情相关内容增长趋同,但不同主题信
息的扩散力不同,甚至出现相反的时滞扩散效果;引导公众产生负向情感的虚假信息在一定程度上会引发公众的
大规模讨论。【创新/局限】从时滞性扩散的角度解读突发公共卫生事件下不同主题虚假信息的演化特征,为虚假信
息分析与治理提供了新的视角。但数据采集存在局限,虚假信息的传播渠道太过广泛,相关信息难以收集完整。 相似文献
18.
[目的/意义]研究在互联网环境下舆情信息传播路径及传播规律,使社会网络分析法在今后的舆情信息研究中能够更好地被应用,使其理论和方法更加完善,也能对移动环境下舆情传播监管对策具有一定的借鉴意义。[方法/过程]在对研究对象界定的基础上,利用社会网络分析法（Gephi软件）结合新浪微博"大学生理财"的话题所采集的基础数据,对移动网络环境下舆情传播特征、过程、规律进行实证研究,参考研究结论提出具体监管对策。[结果/结论]验证了社会网络分析方法对于移动环境下网络舆情信息传播研究的有效性和实用性,说明了移动环境下网络舆情信息传播的大致特点,并且为今后进行此项研究提供了新的思路,为实践层面监管网络舆情信息传播提供了借鉴模式。 相似文献
19.
理清"一带一路"沿线国家或地区的民心特点,并找到有效的合作交往模式,是关系到国家战略实施的重大问题。但是,由于地域辽阔、民族众多,且地缘政治、经济、文化因素(如原苏联影响、欧美国家殖民、宗教传统等)异常复杂,传统的分析方法往往难以奏效。该研究结合文化心理学和大数据分析技术,利用社交媒体Twitter数据来分析"一带一路"沿线国家或地区的自我表征特点(独立性或个人主义),并建立自我表征与社会信任(普遍信任、特殊信任)的预测模型,以探究与"一带一路"沿线国家或地区合作交往的行为模式,即:自我表征是独立,还是互依;人际关系偏好是陌生人之间的普遍信任,还是熟人间的特殊信任。结果表明,"一带一路"沿线国家或地区在自我独立性这一个人主义文化指标上存在较大的变异,且主要受欧美国家殖民历史和当地宗教传统的影响;此外,针对陌生人、外国人的普遍信任与针对家人、熟人的特殊信任,可以通过个人主义指标来预测。总之,"一带一路"沿线的文化是多样的,可以通过社交媒体产生的海量语料库快速计算其个人主义指标,并以此来建立自我表征与社会信任的预测模型。该研究为分析"一带一路"战略区域的"民心"特点、探索当地合作交往的行为模式提供了新的技术路径。 相似文献
20.
《Information processing & management》2022,59(4):102998
COVID-19 crisis has been accompanied by copious hate speeches widespread on social media. It reinforces the fragmentation of the world, resulting in more significant racial discrimination and distrust between people, leading to crimes, and injuring individuals spiritually or physically. Hate speech is hard to crack for a global recovery in the post-epidemic era. Conducting with Twitter datasets, this paper aims to find the key indicators that influence the trend of hate speech, then builds a Gaussian Spatio-Temporal Mixture (GSTM) model for trends prediction based on the pre-analysis. Findings show that in the early period, the participation of influential users is closely related to the emergence of sentiment peaks, and the interval time is around one week. After hate speech waves up, the indicator of total exposure becomes more critical, suggesting that grass-root release influences at this stage. Compared with three classical time-series predicting models, the GSTM model shows better peak prediction ability and lower residual mean. This work enriches the approaches of predicting unknown but foreseeable hate speeches accompanied by future pandemics. 相似文献