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对秦皇岛市2000-2011年3种类型专利的申请量、1985年至今的专利IPC构成、专利权人排行等内容进行统计,从专利角度分析了秦皇岛市的技术创新能力和竞争力,并探讨了提升城市技术创新能力的措施. 相似文献
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[目的/意义]打破聚类分析法关系分析的固有模式,从关键词共现网络的结构出发,探讨关键词网络位置对技术间关联关系的影响。[方法/过程]基于ESI数据库2017年5月的更新数据,以电子信息领域的高影响力论文为研究对象,在对该领域进行宏观分析的基础上,依据结构洞和桥结构两种媒介角色理论,基于关键词共现网络分析电子信息领域内各技术的媒介角色,识别各技术之间的内在关联。[结果/结论]研究结果表明,优化研究、智能电网、功率控制、非线性系统、时间延迟、稳定性、同步技术等技术的媒介作用较重要,与多种技术存在关联,对电子信息领域的技术发展有至关重要的作用。媒介角色理论从结构角度出发,将微观的个体间关系与整个网络的宏观结构相结合的分析思路为技术间关联关系的探讨提供了新的视角。 相似文献
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《报刊的四种理论》是研究媒介规范理论的经典文献,它影响了学界对媒介分类和媒介社会角色的认知。然而由于政治经济和技术环境的变迁,四种理论的提法已经无法关照社会现实。基于对《报刊的四种理论》的超越和批判,各国学者都在对规范理论进行重新思考后提出了新的理论视角。本文对《报刊的四种理论》后的媒介规范研究进行了总结,希望从西方和非西方两种视角寻找媒介规范理论发展的新路径。 相似文献
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现有研究主要关注游戏的叙事、化身如何对网络游戏成瘾产生影响,而对网游带来的积极情绪体验鲜少有深度分析。传输理论指出,当叙事传输（人们暂时迷失于故事）发生时,受众会对虚构角色产生认同,继而收获媒介享受体验;该心理过程在具有交互属性的媒介（如网络游戏）中表现更佳。基于此,通过采用问卷法对网游玩家进行在线调查,重点分析了叙事传输对网游享受的影响机制以及化身认同的中介作用。结果发现：叙事传输不仅可以直接影响网游享受,还可以通过化身认同的中介作用对网游享受产生正向影响。该结果对政府如何完善游戏治理以充分发挥网游的积极作用,保障玩家的身心健康具有深远的理论和实践意义。 相似文献
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本文以福建南平校园暴力犯罪案的媒介表现为例,对风险社会中新闻媒介的社会角色进行分析发现,以往新闻学理论多从反映事实、呈现真相、促进问题的解决等方面理解媒介的社会角色.本文认为,在风险社会中,媒介的社会角色还表现在,在定义突发事件的风险性并且把这种定义转变为一种公共理解时,提供了认知世界的基本框架.媒介的此种角色不但影响... 相似文献
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贺姣 《中国广播电视学刊》2023,(9):30-33
媒介触达了社会各个领域,也渗透到大众生活的方方面面,媒介不再只是传播信息的一种中介,而是融入到整个社会之中,参与并影响着社会事务的发展,推动着媒介化社会的形成。本文着重阐述了媒介化与媒介化社会的理论渊源,并以此为基础分析了媒介化社会网络信息传播面临的风险,希望通过重视主流内容传播、回归新闻专业主义、持续加强信息公开、完善网络信息法规、提升媒体把关能力、提高公众媒介素养等措施,助力网络信息在媒介化社会中的健康传播,推动社会良性运转。 相似文献
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“传播与国家发展理论”在其发展过程中对媒介角色与功能有不同的认识。早期“现代化”理论依据传播“强效果”论,将大众传播媒介设定为“神奇的增殖器”,媒介在这一发展理论模式中起着决定性的作用。“依附理论”阶段,媒介的角色被调整到一种次要的位置,其效力必须通过与社会传统的传播网络共同作用才能发挥出来。在“新国际体系”阶段,传播效果和传播角色重新被认为居于重要位置。作者认为传播媒介功能的发挥,除了平等的国际传播环境和全民参与的内部条件外,还必须综合考虑社会整合程度、受众能力、传播制度等因素,只有诸多因素和谐发展,媒介才能在国家发展中起到良好的作用 相似文献
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This study uses bibliographic coupling to identify missing relevant patent links, in order to construct a comprehensive citation network. Missing citation links can be added by taking the missing relevant patent links into account. The Pareto principle is used to determine the threshold of bibliographic coupling strength, in order to identify the missing relevant patent links. Comparisons between the original patent citation network and the comprehensive patent citation network with the missing relevant patent links are illustrated at both the patent and assignee levels. Light emitting diode (LED) illuminating technology is chosen as the case study. The relationships between the patents and the assignees are obviously enhanced after adding the missing relevant patent links. The results show that the growth rates on both the total number and the average number of links have apparently improved at the patent level. At the assignee level, the number of linked assignees and the average number of links between two assignees are increased. The differences between the two citation networks are further examined by means of the Freeman vertex betweenness centrality and Johnson's hierarchical clustering. The patents with more new links to other patents have distinct results in terms of the Freeman vertex betweenness centrality. The enhancement of links among patents also results in different clustering. 相似文献
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在回顾组织社会网络结构理论研究的基础上,结合分析六家公司案例数据,从群体密度、群体中心性和群体中介性三个网络结构指标角度,对比研究组织内跨部门咨询网络和情报网络结构的差异性。研究发现:咨询网络的密度比情报网络的密度低,而在群体中心性和群体中介性方面,咨询网络比情报网络高。最后,针对这一结论对理解组织内部工作信息传递、组织沟通和知识管理等的作用和启示进行了探讨。 相似文献
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提出为鼓励更多创新成果问世,科研评价体系应增设创新潜力评价指标。从理论上阐述以网络结构为视角的结构洞理论和媒介角色分析在测度评价客体创新潜力方面的适用性。以经济学作者为例,实证结构洞约束系数和媒介角色系数作为创新潜力测度指标的实用性。经过理论探讨和实证研究,总结这两种指标的特性、关系和使用方式,认为这两种指标对于学科、作者、机构等的创新潜力均可测度,并且应配合使用达成综合评价。 相似文献
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We analyze whether preferential attachment in scientific coauthorship networks is different for authors with different forms of centrality. Using a complete database for the scientific specialty of research about “steel structures,” we show that betweenness centrality of an existing node is a significantly better predictor of preferential attachment by new entrants than degree or closeness centrality. During the growth of a network, preferential attachment shifts from (local) degree centrality to betweenness centrality as a global measure. An interpretation is that supervisors of PhD projects and postdocs broker between new entrants and the already existing network, and thus become focal to preferential attachment. Because of this mediation, scholarly networks can be expected to develop differently from networks which are predicated on preferential attachment to nodes with high degree centrality. 相似文献
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Q-measures are network indicators that gauge a node's brokerage role between different groups in the network. Previous studies have focused on their definition for different network types and their practical application. Little attention has, however, been paid to their theoretical and mathematical characterization. In this article we contribute to a better understanding of Q-measures by studying some of their mathematical properties in the context of unweighted, undirected networks. An external Q-measure complementing the previously defined local and global Q-measure is introduced. We prove a number of relations between the values of the global, the local and the external Q-measure and betweenness centrality, and show how the global Q-measure can be rewritten as a convex decomposition of the local and external Q-measures. Furthermore, we formally characterize when Q-measures obtain their maximal value. It turns out that this is only possible in a limited number of very specific circumstances. 相似文献
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共被引网络中介中心性的Zipf-Pareto分布研究 总被引：4，自引：0，他引：4
针对共被引网络的统计特性的研究,以科学计量学领域的权威期刊《科学计量学》(Scientometrics)为数据来源,建立共被引网络,明确了《科学计量学》(Scientometrics)中高被引文献与高中心性引文的特点;以该共被引网络为例,应用复杂网络分析方法,分析了共被引网络的统计特性,包括度分布、中介中心性的分布等。结果表明共被引网络是一个具有小世界、无标度特性的复杂网络;中介中心性的分布符合Zipf-Pareto分布;而且只有少部分引文节点具有高中介中心性的值,多数引文节点的中介中心性值都很小。 相似文献
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文章介绍了“结构洞”的相关概念和理论,从结构洞指数和中介中心性指数两个方面论述了结构洞的测度方法,分析了组织社会网络中存在的结构洞所能带来的结构位置利益及其对组织隐性知识共享的影响,最后以一家高新技术企业研发部门内的社会网络为例,利用社会网络分析方法对组织社会网络中的结构洞对组织隐性知识共享的影响进行了实证研究. 相似文献
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Despite its rising position as a first-class research object, scientific software remains a marginal object in studies of scholarly communication. This study aims to fill the gap by examining the co-mention network of R packages across all Public Library of Science (PLoS) journals. To that end, we developed a software entity extraction method and identified 14,310 instances of R packages across the 13,684 PLoS journal papers mentioning or citing R. A paper-level co-mention network of these packages was visualized and analyzed using three major centrality measures: degree centrality, betweenness centrality, and PageRank. We analyzed the distributive patterns of R packages in all PLoS papers, identified the top packages mentioned in these papers, and examined the clustering structure of the network. Specifically, we found that the discipline and function of the packages can partly explain the largest clusters. The present study offers the first large-scale analysis of R packages’ extensive use in scientific research. As such, it lays the foundation for future explorations of various roles played by software packages in the scientific enterprise. 相似文献