排序方式： 共有27条查询结果，搜索用时 62 毫秒
1.
以太无源光网络(EPON)技术研究 总被引：1，自引：0，他引：1
首先介绍了以太无源光网络(EPON),分析了EPON技术及其实现,探讨了EPON的几种网络拓扑结构并提出了改进方法。 相似文献
2.
本文以联盟管理、社会网络理论为基础，以参与“2011计划”协同创新中心的合作单位为研究对象，从组织声誉、联盟经验和网络中心性三个维度，对高校、科研院所的产学研合作协同创新绩效的影响因素进行了研究。在对国内外相关理论研究进行梳理与回顾的基础上，提出研究问题并建立实证研究模型，并利用二手数据进行分析验证。最终得到以下结论：（1）高校及科研院所的组织声誉与协同创新绩效之间的关系不显著；（2）高校及科研院所的联盟经验与协同创新绩效之间存在显著的正相关关系；（3）高校及科研院所在协同创新合作网络中所处位置的中心性对其联盟经验与协同创新绩效之间的关系起部分中介作用；（4）政府合作对高校及科研院所在协同创新合作网络中所处位置的中心性与其创新绩效之间关系的调节作用不显著。 相似文献
3.
【目的】 针对当前我国在学科交叉特征研究中的不足,建立一套规则、结构清晰的学科交叉特征识别方法。【方法】 以Web of Science数据库收录的生物医学工程领域论文所属期刊的学科分类为数据基础,通过引入中介中心性、度中心性、信息熵指标,利用学科共现分析方法,结合Bibexcel、Ucinet社会网络分析软件建立学科关联网络图谱,识别生物医学工程领域学科交叉的结构演化特征,验证了其在学科交叉特征识别中的可行性。【结果】 分析生物医学工程领域的学科交叉特征,得出该领域的亲缘学科,结果表明“生物医学工程”研究领域的信息熵随着时间的演进而增大,说明该领域的学科交叉程度愈加深入。【结论】 实验结果与实际情况较为一致,验证了学科交叉特征识别方法的可靠性。 相似文献
4.
基于SNA的图书情报学期刊互引网络结构分析 总被引：6，自引：0，他引：6
以CSSCI 2006-2007年图书情报学来源期刊为数据源,采用社会网络分析法,对该学科期刊形成的引用网络结构进行解析.通过密度、平均距离及凝聚力的测度,证明该网络比较紧凑,连通状况良好;通过中心性分析,识别在局部网络中起核心或中介作用的期刊;通过结构对等性分析,将引用网络中的期刊分为"知识源"、"中转站"和"储备库"=三种"角色".研究结果为期刊布局与评价提供定量支持.图5.表5.参考文献10. 相似文献
5.
任务紧迫性下个体情感网络特征、情绪劳动及创新行为的关系研究 总被引：1，自引：0，他引：1
借助情景实验,对任务紧迫性下个体情感网络特征、情绪劳动和个体创新行为之间的作用机理展开研究。结果表明,情感网络中心性在浅层劳动与个体创新行为的关系中起着倒U型调节作用,情感网络中心性在深层劳动与个体创新行为之间起到正向的调节作用。对情绪劳动的合理引导以及对情感网络的有效控制能够充分运用情绪资源的资本优势,促进个体实施创新行为。 相似文献
6.
Thomas Hugh Feeley Jennie Hwang George A. Barnett 《Journal of Applied Communication Research》2013,41(1):56-73
Employees (n=40) at a fast-food restaurant were surveyed about characteristics of their position and their level of satisfaction. Employees were then asked to report with whom they regularly communicated inside and outside the workplace and to indicate how close they were to employees with whom they were linked. Employee turnover was measured after three months had elapsed. A goal of the research was to replicate a model of employee turnover that predicts employees more central in their social network to be less likely to leave, and to test a social support explanation of the centrality model. The results indicated that employees who reported a greater number of out-degree links with friends were less likely to leave. The number of in-degree links with friends did not significantly predict turnover, and neither did network links with peers. Friendship prestige, measured by the number of in-degree links, was strongly correlated with relational closeness and amount of time spent with employees outside the workplace. 相似文献
7.
Collaboration can be described using layered systems such as the article–author–institute–country structure. These structures can be considered ‘cascades’ or ‘chains’ of bipartite networks. We introduce a framework for characterizing and studying the intensity of collaboration between entities at a given level (e.g., between institutions). Specifically, we define the notions of significant, essential and vital nodes, and significant, essential and vital sub paths to describe the spread of knowledge through collaboration in such systems. Based on these notions, we introduce relative and absolute proper essential node (PEN) centrality as indicators of a node's importance for diffusion of knowledge through collaboration.We illustrate these concepts in an illustrative example and show how they can be applied using a small real-world example. Since collaboration implies knowledge sharing, it can be considered a special form of knowledge diffusion. 相似文献
8.
《Sport Management Review》2017,20(5):497-509
To understand how partners within a large, multi-sectoral network coordinated amongst one another, this paper empirically determined stakeholders’ network capital vis-à-vis centrality by focusing on the relationships within the Vancouver 2010 Olympic Winter Games. An embedded case study was built using 6382 pages of documents (e.g., meeting minutes, memos, newspaper articles, and annual reports) and 55 interviews, and analyzed using social network analysis. The results revealed actors used eight types of ties in their coordination efforts: collaboration, communication, coordinating bridge, instrumental, legal, regulatory, transactional, internal link, and external link. Also, highly centralized actors were context specific to each level of government, with the organizing committee and federal secretariat emerging as the most critical for coordination efforts. Findings empirically demonstrate the importance of the national/federal government to coordinate multi-sectoral sport event networks. Thus, sport event partners can consider structuring an event’s network administrative organization to fit their differing strategic goals. 相似文献
9.
10.
基于图挖掘的文本主题识别方法研究综述 总被引：1，自引：1，他引：0
本文通过文献调研分析,将基于图挖掘的文本主题识别方法总结为中心度方法、紧密关联子图查找和图聚类三种,后两者又细分为基于clique子团或类clique子团、基于图拓扑结构或结点属性聚类的方法。中心度方法通过对比文本网络中术语结点的重要度来实现文本主题的识别,紧密关联子图查找和图聚类方法则是根据文本图中术语结点和边的属性相似度来识别文本核心主题。基于语言文本网络自身特性,如何构建复杂文本关系图来同时揭示术语间的句法、共现和语义关系,如何基于术语关联和图拓扑结构识别其中的紧密关联子团,基于何种标准将紧密关联子团聚类以揭示文本核心主题,都是未来需要进一步深入研究的问题。表1。 相似文献