共查询到20条相似文献，搜索用时 156 毫秒
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[目的/意义] 通过量化计量指标对研究主题的知识扩散进行测度与分析,客观地展现研究主题所包含的知识单元的扩散路径及其扩散规律。[方法/过程] 以Web of Science（SCI-E&SSCI）数据库核心合集为数据来源,通过被引参考文献检索方法,以J.E. Hirsch 2005年首次提出H指数概念的文献为被引文献,检索2005-2015间引用该文献的施引文献,得到样本数据。借助信息可视化分析工具CiteSpace分别进行关键词共现与文献共被引分析。将分析结果通过本文所提出的双阶知识扩散度指标Q算法进行计算,得到指标Q量变情况,并进一步分析H指数研究领域的演化扩散状况。[结果/结论] H指数研究主题的知识扩散的相关性随着流动阶层的增加而降低;H指数研究主题一、二阶知识扩散文献的主要研究方向不同,二阶文献更侧重于应用领域的拓展,这也是该研究邻域知识流动的新增长点;通过对H指数研究主题的分析,证明了本文所提出的双阶知识扩散度指标Q的准确性及科学性。 相似文献
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融合主题与情感特征的突发事件微博舆情演化分析 总被引：1，自引：0，他引：1
[目的/意义]微博是突发事件网络舆情传播的重要媒介。面向突发事件的微博主题和情感挖掘对掌握突发事件的网络舆情、识别与预测潜在问题及风险等方面具有重要的实践意义。尝试提出一种融合主题与情感特征的突发事件微博舆情演化分析方法。[方法/过程]以寨卡事件为例,通过划分微博舆情演化的生命周期,基于word2vec技术分别提取该事件生命周期各阶段的微博主题,采用基于词典的情感分析方法,引入情感词、表情符号等多情绪源,对不同主题下的评论情感做细粒度划分,并计算情感强度,最终实现微博主题与情感的协同分析。[结果/结论]所提出的微博舆情演化分析方法能够揭示面向特定事件的微博在突发事件生命周期各阶段的主题特征、情感类型与强度,剖析网络舆情主题与情感特征的协同演化规律。 相似文献
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突发事件报道中的媒体失范现象分析 总被引：1，自引：0，他引：1
突发事件是指那些突然间发生、带有异常性质、人们缺乏思想准备的事件。①一般而言,它具有突发性、异常性、破坏性、紧迫性和社会冲击力等特点。突发事件关系国计民生、受到受众 相似文献
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在新闻报道中,我们经常遇到突发事件。突发事件分两类:一类是自然性突发事件,指由于自然原因引发的具有严重的破坏性和较大影响力的非正常事件,如自然灾害和非人为的重大交通事故、生产事故等;一类是社会性突发事件,指由于各种社会矛盾引起的对社会具有强大的震撼性和破坏力的非正常事件。对自然性突发事件的报道,我们顾虑较少,一般不存在什么争议,而社会性突发事件由于牵涉到各方面的社会矛盾,存在着不同的利益冲突,对人心的稳定和社会的发展均有着重大的影响,所以在报与不报及如何报道的问题上分歧很大,成为报道中的难题,因而有必要对这个问题进行认真的探讨。 相似文献
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[目的/意义]为了更快速高效地应对重大突发事件,本文针对重大突发事件的动态演变过程展开研究,以期辅助相关部门对重大突发事件的应对和决策。[方法/过程]基于事理图谱的理论与方法,通过事理图谱构建、事件泛化等步骤得到重大突发事件抽象事理图谱,对其进一步分析总结事件演变的动因,结合系统动力学模型进行事件演变的动态仿真模拟。[结果/结论]研究结果表明,高度泛化的知识可以揭示事件演变的原因、影响因素;重大突发事件事理图谱与系统动力学方法的结合实现了从知识视角仿真模拟事件演变的过程。 相似文献
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危机主要形成于突发事件。由于突发性事件在发生前的隐蔽性,如：重大突发性自然灾害、突发性公共卫生事件、突发性安全事故和灾难事故、公共管理和社会治安类突发事件等。危机事件的突发性,使我们很难做出准确的预测,在短时间内形成完整应对方案,突发事件发生后往往波及范围广、破坏性大,带来比较严重的物质损失和负面影响而成为社会关注的热点,形成危机。 相似文献
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通过对"李天一事件"、"长春婴儿随车被盗案"等一系列近期微博焦点事件的分析,本文探讨了微博在突发事件中对舆论的影响。研究发现,在突发事件的潜伏期,微博的作用在于将客观事件转化为微博事件,唤起舆论,并使社会焦点议题涌现;爆发期时,微博的舆论作用机制主要是事件现场呈现、事件真相挖掘、事件的舆论集散和观点导向;延续期时,微博则成为全民监督、信息反馈的舆论平台,而后发的突发事件又将对元事件的舆论热点进行转移。 相似文献
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在突发事件演化机理的众多研究中,阶段型研究一直以来备受重视。本文对突发事件演化机理的研究历程和成果进行了梳理和总结,将突发事件演化周期分为:危机潜伏期、事件爆发期、危机蔓延期和事件恢复期四个阶段,并对每一阶段突发事件的发生特征、发生时间、表现特征进行了阐释。在此基础上,本文也对研究突发事件的舆论变化及舆论引导有几点建议,为在现实中合理有效地引导突发事件的舆论提供了一定参考和借鉴。 相似文献
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Milan Grba 《Slavic & East European Information Resources》2017,18(3-4):152-164
This article surveys a sample of sources of the information about Romania available to British readers in nineteenth century British newspapers and periodicals. It traces first contacts between the Romanian lands and Britain after the union of the principalities of Wallachia and Moldavia in 1859, then after their independence from the Ottoman Empire. The article highlights an increased Romanian interest in British periodicals, which reported and reviewed Romanian literature and scholarship. The article concludes that nineteenth century British newspapers and periodicals offer a great variety and wealth of new material previously unavailable or unknown to researchers. It also states that only a portion of a large quantity of this material has been indexed and is therefore available via the bibliographic sources mentioned in the article. The author argues for the need of a new and updated British-Romanian bibliography, which can draw on new online resources offering access to thousands of new newspapers and periodical records. 相似文献
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《Slavic & East European Information Resources》2013,14(4):25-33
ABSTRACT The paper looks at library approval plans for material published in Slavic, East European, and Eurasian countries from the selector's point of view. Reasons why a selector would or would not want one are examined. Success with approval plans requires monitoring receipts, as well as good and ongoing communication among the selector, the acquistions department, and the vendor. A preliminary list of vendors offering approval plans for the countries of the region appears in the appendix. 相似文献
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为进一步提升武汉科技信息共享服务平台使用效率,本文从平台资源建设、资源应用、供需对接方式和供需特点等方面分析了武汉科技信息资源服务现状;基于需求和利用的角度,结合平台管理实践和走访用户、问卷调查等研究方法,从信息资源需求主体和平台自身建设管理两个维度,找出制约科技资源供需对接的主要因素;以市场化和制度化为创新理念,从政策创新、机制创新、市场化服务、环境营造、人才培养等方面提出平台建设由“资源集聚”向“需求导向”转变的对策建议. 相似文献
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《Slavic & East European Information Resources》2013,14(1-2):123-143
ABSTRACT The article examines the most important periodicals of ethnic minorities in Poland. After 1989, many ethnic groups (e.g., Germans and Romanies) were allowed to publish journals and newspapers for the first time since the end of World War II. The publications examined show the rich cultural life of the various ethnic groups as well as their current status in Poland. In addition to popular titles, some scholarly publications are also discussed. 相似文献
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Jon C. Giullian 《Slavic & East European Information Resources》2013,14(3):278-284
The author answers a reference question on bibliographic sources for the Ukrainian periodical press 1840–1850. Helpful publications include bibliographies, guides, and library catalogs. These potentially make mention of revolutionary developments in Hungary (such as the Twelve Points paragraph of the Demands of the Hungarian Nation in March 1848, the subsequent April Laws, and Hungary's declaration of independence in April 1949), and elsewhere in the Hapsburg Empire. 相似文献
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Kelly Ahlfeld 《International Information and Library Review》2017,49(4):285-289
Chromebooks and the G Suite group of products, like Google Search, Gmail, and Google Docs, have rapidly expanded in American schools during the past 5 years. The impact of one-to-one Chromebook devices and the pervasive use of Google's software products in American education cannot be overstated. This article explores some of the influences of these products on research, based on the experiences of a librarian and technology coordinator at an elementary education level. The author has several suggestions for effective research with these products in mind. 相似文献
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《Behavioral & Social Sciences Librarian》2013,32(1):49-54
Library historians can learn a great deal from studying the gender of authorship and institutional affiliation of a scholarly journal. The focus of this study is to examine these two aspects of journal production in library history to see who is producing published research in this field. Twenty-three years of Libraries & Culture were chosen as the target volumes. The study reveals that more men than women published in library history as well as locating which institutions were represented. This type of information is usedful to the library historian engaged in the analysis of published scholarship, and more generally to scholars with an interest in patterns of literature production in fields closely related to the social and behavioral sciences. 相似文献
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《Slavic & East European Information Resources》2013,14(1):25-74
ABSTRACT The history of the almanac in Croatia is reconstructed through primary research in bibliographic and archival sources. The almanac is a vehicle for knowledge communication in informal contexts, engaging both oral tradition and literary forms traceable to medieval literacy and ways of structuring knowledge. The history of the almanac in Croatia reflects the changing context of the book trade, literacy, and the evolution of language. Four main stages are identified: (1) the beginning of the annual almanac in the seventeenth century; astrological almanacs reflecting the sensibility of the Baroque period; (2) the Enlightenment's stimulation of almanac publishing in the spirit of contemporary secular reforms in agriculture and education; (3) nineteenth-and twentieth-century almanac trade, showing complex and overlapping networks for the production, distribution and appropriation of printed almanacs;(4) roughly the end of World War II, when the almanac slowly moved out of the role of a popular mass medium and into specialized niches represented by regional, diaspora, and religious almanacs. 相似文献
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《The Reference Librarian》2013,54(74):121-164
Summary Although the Internet provides access to a wealth of information, there is little, if any, control over the quality of that information. Side-by-side with reliable information, one finds disinformation, misinformation, and hoaxes. The authors of this paper discuss numerous examples of fabricated historical information on the Internet (ranging from denials of the Holocaust to personal vendettas), offer suggestions on how to evaluate websites, and argue that these fabrications can be incorporated into bibliographic instruction classes. 相似文献