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以新浪微博为例,通过网络爬虫软件抓取新浪用户的相关信息。使用计量学方法,对用户特征进行统计分析,并利用决策树分析、相关性分析和关联挖掘用户特征。结果表明:新浪微博的认证用户和非认证用户之间存在明显差异;微博客用户的特性、发布微文时间段、微文长度、关注者、粉丝量和微文数等具有统计特性,地域差异明显;微博客用户选择是否公布城市,是否允许所有人私信、评论等之间存在一定关联关系;另外,通过对用户的分类发现,其中三种类型的用户群体之和占用户总体的85%以上,具有显著特性,为微博客用户特性的深入研究提供参考依据。 相似文献
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基于精细加工可能性模型(ELM)理论,依据微博数、粉丝数和关注数,在将微博用户划分为游离型、信息获取型、活跃型和名人型4种群体的基础上,构建了微博用户公共情绪偏好分析模型,并进行实证研究,最后针对微博用户的分类引导提出了可操作性建议. 相似文献
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以人人网和新浪微博为例,通过SPSS统计软件分析比较实名SNS社交网络与微博的功能特征与用户行为特点。研究认为人人网用户活跃度与用户本身隐私保护意识有一定联系;新浪微博用户活跃度与用户的学历存在一定联系。人人网与新浪微博同时存在用户被动接收推送广告信息问题,影响了用户的体验度。探讨了人人网与新浪微博的商业化运营趋势,为实名社交网站和微博的完善与差别化发展提供了理论依据。 相似文献
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为了衡量新浪微博信息传播效果,本文在10个不同话题领域分别选择公众微用户、意见领袖（加“V”）用户以及普通用户共30个决策单元,利用模糊数据包络分析模型进行实证分析,研究结果表明,用户属性、内容属性、媒介属性都对新浪微博信息传播具有影响,而在不同的话题领域影响具有异质性。 相似文献
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以新浪微博中用户数据为基础,建立"名气指数",并使用统计分析、相关分析、Apriori模型分析挖掘名人用户的总体特征、关系特征和行为特征,以及创建"转发影响力指数"定量研究名人效应。研究表明:名人微博用户特征具有较强个性化,在微博活跃用户群体中具有极大的代表性;名人用户在微博中曝光度较高,通过公开自己的真实资料,提高自己的名气;企业可以根据自身需求,通过名气指数或转发影响力指数的结果进行微博营销决策。 相似文献
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微博用户群体在网络群体性事件的发展中扮演着重要角色,同时对于微博环境的塑造和社会稳定发展都有重要作用。微博用户群体行为具有复杂性,从宏观方面来看,微博用户群体的结构、群体的言论表现以及群体行为的自适应性使得群体面临复杂的客观环境,群体成员需要根据环境的变化不断调整自身行为;从微观上来看,群体成员之间的互动和群体成员的心理与动机使得成员行为处于不断变化的状态,这也间接影响了群体行为的状态。在宏观因素和微观因素的共同作用下,微博用户群体行为表现出不稳定性、不可预测性和复杂性,需要运用复杂网络的相关理论,建立模型,才能更好地认识微博用户的群体行为。 相似文献
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微博在信息的传播效果和传播速度上拥有突出优势,转发功能可以使微博信息在短时间内实现跨群体、病毒式传播,并通过几何级的传播而形成广泛影响力。本文以新浪微博普通用户为实验对象,通过网络问卷收集数据,采用因子分析和主成分分析法研究微博用户的转发动机。微博普通用户转发微博的动机主要为:娱乐消遣动机、自我实现动机、环境监测动机、人际交往动机。最后,根据微博用户转发动机的分析结论,提出了相应的政策建议。 相似文献
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随着互联网的普及,微博应用得以在国内高速发展,越来越多的网民开始使用微博,微博的普及率和用户的黏性也逐渐加大,更多的商家从微博应用中嗅得了商机,微博中的草根大号已经成为企业获得盈利的工具,但是各搭建平台的微博平台企业成立至今却仍却颗粒无收,种种矛盾日趋明显。本文针对中国微博发展速度过快,用户增长迅速,容易滋生用户监管方面的问题进行了分析。在研究中对微博平台企业、监管部门、用户三方之间的关系进行了研究分析,在三方的演化博弈模拟中分析了各方应对各种策略时的抉择情况。 相似文献
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《中国科学院院刊(英文版)》2008,22(1):2-3
CAS should stick to the principle of rendering service to, and giving impetus for, the development of China＇s science enterprise by making S＆T innovations, said CAS President LU Yongxiang. The CAS president made the remarks in a recent talk to communicate the gist of the winter session of the Party＇s Leading-member Group at CAS, which was held from 7 to 11 January in Beijing. 相似文献
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Marjorie Armstrong-Stassen Margaret Landstrom Ramona Lumpkin 《The Information Society》1998,14(2):153-164
This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors. 相似文献
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《中国科学院院刊(英文版)》2008,22(1)
With great care, Dr. ZHOU Zhonghe takes out a package wrapped by cotton tissue from a drawer and says: "This is the gem of our collections: the fossil of a bird that lived 125 million years ago!" Then, pointing at a tiny mound, he explains: "Look, this is the claw and that is the head. It was in the egg shell and ready to hatch ... The species fell into a family of waterside inhabitants." 相似文献
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A joint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology his co-workers from Norway US Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells suggesting that China's projected climate warming could decrease the pest's numbers. The study was published in Proceedings of the National Academy of Sciences on September .…… 《中国科学院院刊(英文版)》2008,22(1):6-7
Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China＇s projected climate warming could decrease the pest＇s numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007. 相似文献
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Caroline Haythornthwaite 《The Information Society》2001,17(3):211-226
A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction. 相似文献
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Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies. 相似文献
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Puay Tang 《The Information Society》1998,14(1):19-31
The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means. 相似文献
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Milton Mueller 《The Information Society》2001,17(3):151-163
Long-standing conflict between domain name registrants and trademark holders prompted the Internet Corporation for Assigned Names and Numbers (ICANN) to create a global, mandatory arbitration procedure known as the Uniform Dispute Resolution Policy (UDRP). The UDRP has been used in 2166 cases involving 3938 domain names as of 1 November 2000. The policy gives the initiator of a complaint, generally a trademark holder, the right to choose which ICANN-accredited dispute resolution service provider (RSP) will handle the case. During the preparation of the UDRP,some feared that complainant selection would lead to "forum shopping" that might bias the results. This article performs a statistical assessment of the forum-shopping thesis and finds support for it. There are statistically significant differences in the various RSPs' propensity to take away names from defendants; there are also major differences in the number of cases brought to each RSP. RSPs who take away names have the larger share of cases. The study examines other variables that might explain differences in market share, such as price, the plaintiff's nationality, or the time taken to decide a case. It finds that nationality and time also are correlated with market share. The study concludes that shopping for a favorable outcome is an important factor in the UDRP. 相似文献
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Prof. Raymond C.K. Chen a neuropsychologist with the CAS Institute of Psychology has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology.…… 《中国科学院院刊(英文版)》2008,22(1):15-15
Prof. Raymond C.K. Chen, a neuropsychologist with the CAS Institute of Psychology, has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology. 相似文献
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Prof. SUN Changpu from the CAS Institute of Theoretical Physics coworkers from University of Basel in Switzerland have worked out a way - at least in theory - to split a beam of molecules according to their chirality. The technique involves passing the molecules through three different laser beams is similar to the famous Stern-Gerlach effect whereby a beam of atoms passing through a magnetic field is split in two according to the atoms' spin states 《中国科学院院刊(英文版)》2008,22(1):23-23
Prof. SUN Changpu from the CAS Institute of Theoretical Physics and coworkers from University of Basel in Switzerland have worked out a way --at least in theory --to split a beam of molecules according to their chirality. The technique involves passing the molecules through three different laser beams and is similar to the famous Stern-Gerlach effect, whereby a beam of atoms passing through a magnetic field is split in two according to the atoms＇ spin states （Phys. Rev. Lett. 99 130403）. 相似文献