共查询到20条相似文献，搜索用时 78 毫秒
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新闻是一种客观真实地反映新近发生的客观事实本来面目的特殊方式。在新闻活动中,客观事实经过新闻工作者转化为新闻,再传达给受众,自始自终都贯穿着新闻工作者的思维活动。新闻活动实际上就是一种复杂的思维活动。人的思维活动往往不受时空的限制,可以超越时空而构成无限的空间。新闻的思维活动同样应具有广阔的空间,才能更为全面地反映客观世界,揭示事物的本质特征。 相似文献
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在1991年抗灾宣传中,县级电视的作用发挥得很充分,并显示出它独特的优势。一、时空优势各级电视台所处的地理位置不同,这就造成新闻发布与新闻采访点之间空间距离上的不同,同时,也就造成新闻从采访到播出时间长短上的不同,一般地讲,发生在基层的新闻,特别是抗洪救灾现场的 相似文献
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蒙太奇理论在观念摄影领域有一定理论基础,但还存在着向新闻纪实摄影领域丰富和拓展的空间。借鉴电影蒙太奇的理论成果,解读经典新闻纪实摄影案例,总结出时间、角度、类型与空间四种新闻摄影蒙太奇表达类型,并分析各自的核心表现力。同时认为,仅就作品的客观效果而言,蒙太奇能够帮助新闻摄影作品突破单幅作品天然的时空和意义所指局限。 相似文献
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本文通过后殖民视角解读新闻翻译．分析新闻翻译当中归化与异化两种翻译策略的选择所反映出的政治文化权力问题。 相似文献
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Sowa在1984年提出了一个抽象模型,即概念图,作为基于语言学、心理学和哲学的知识表示语言.但是其概念图的定义比较简单,对于刻画文本中的语言组块的语义及语言单元之间的组合运算比较困难.为了能从形式上为将来的组块内部和组块之间的组合分析提供支持,深化概念图的表示形式,我们提出了一种适用于自然语言自动化分析的概念图的形式化描述,它可以看成是Sowa 概念图的递归扩展.然后我们将这种新颖的知识表示方式应用到文本检索领域的文本标引中,同时给出了以此为基础的概念图匹配算法.在和布尔检索的比较实验中,概念检索体现出比较明显的优势. 相似文献
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[目的/意义]我国祭祀文化历史悠久,可追溯至先秦时代,祭祀礼器承担祭祀者的信仰,本研究基于《钦定大清会典图》和《皇朝礼器图式》构建清代祭祀礼器知识图谱,可以加快清代档案文献的数字化开发进程,解决清代祭祀相关档案文献分散、利用困难的局面。[方法/过程]本研究采用知识图谱相关方法,通过知识建模构建清代祭祀礼器本体模型,利用知识获取整理并抽取《钦定大清会典图》与《皇朝礼器图式》中实体、属性、关系,将清代祭祀礼器知识以RDF三元组进行知识表示,对不同来源清代祭祀礼器知识进行知识融合,最后利用RDF数据模型存储清代祭祀礼器知识,构建清代祭祀礼器知识图谱,通过检索知识图谱进行知识发现。[结果/结论]研究发现,知识图谱可视化可以清晰呈现清代祭祀礼器间的知识关联;利用SPARQL查询发现清代祭祀礼器颜色有特定含义,且这些颜色与祭祀地点存在间接联系。 相似文献
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Kenning Arlitsch 《图书馆管理杂志》2017,57(3):346-358
Semantic Web Identity (SWI) is proposed as the condition in which search engines recognize the existence and nature of entities. The display of a Knowledge Graph Card in Google search results is an indicator of SWI, as it demonstrates that Google has gathered verifiable facts about the entity. Such recognition is likely to improve the accuracy and relevancy of Google's referrals to that entity. This article summarizes part of the research conducted for a recent doctoral dissertation, showing that SWI is poor for ARL libraries. The study hypothesizes that the failure to populate records in appropriate Linked Open Data and proprietary Semantic Web knowledge bases contributes to poor SWI. 相似文献
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企业网上社区用户忠诚度影响因素的实证分析 总被引：1，自引：0，他引：1
提高用户对网上社区的忠诚度将有助于电子商务网站吸引和保持客户。忠诚的用户不仅自身积极参与网站的交易,而且其言论将对其他用户产生正面且重要的影响。模型假设用户信任及虚拟社区感对忠诚度具有显著作用。虚拟社区感包括三个维度：成员感、影响力、需求满足。对收集的195份有效样本数据采用PLS Graph进行分析,结果发现用户信任显著影响虚拟社区感的三个维度与忠诚度,表明用户信任对于网上社区运作所发挥的基础性作用。此外,在虚拟社区感的三个维度中,仅有需求满足显著影响用户忠诚度。 相似文献
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知识图谱（Knowledge Graph,简称KG）的表示学习方法旨在将知识图谱的实体和关系表示为稠密低维实值向量, 进而在低维向量空间中高效计算实体、关系及其之间的复杂语义关联, 在知识图谱的构建、推理、融合、挖掘以及应用中具有重要作用。已有的知识图谱表示方法仅仅考虑了知识图谱中的直接事实,忽略了知识图谱中一些隐藏的语义信息,这些语义信息对于知识图谱关系和实体的嵌入表示有着重要的影响。本文提出了一种规则增强的知识图谱表示学习方法,该方法首先通过知识图谱规则挖掘的方法提取一组可代表知识图谱语义信息的Horn 逻辑规则,随后通过基于规则的物化推理方法将相应的隐藏语义信息注入到知识图谱表示学习模型中。实验结果表明,基于规则增强的方法可以显著提升已有知识图谱表示学习模型在链接预测和定理预测上的效果和性能。 相似文献
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在大数据时代,企业档案数据呈现海量化趋势。传统的档案服务方式,难以应对日益增长的数据需求。针对这一问题,本文探讨了现阶段企业档案数据服务里亟待解决的问题;提出了“两库两平台”的档案智能利用方法。在企业档案数据利用中引入语义本体概念实现档案数据语义分析的流程,在此基础上构建联通电子档案知识图谱系统,将档案数据之间的关联关系、分析结果直观展示,有效地展现企业电子档案价值,为电子档案的智能化管理以及辅助企业决策提供有力支撑。 相似文献
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Bevan Koopman Guido Zuccon Peter Bruza Laurianne Sitbon Michael Lawley 《Information Retrieval》2016,19(1-2):6-37
This paper presents a Graph Inference retrieval model that integrates structured knowledge resources, statistical information retrieval methods and inference in a unified framework. Key components of the model are a graph-based representation of the corpus and retrieval driven by an inference mechanism achieved as a traversal over the graph. The model is proposed to tackle the semantic gap problem—the mismatch between the raw data and the way a human being interprets it. We break down the semantic gap problem into five core issues, each requiring a specific type of inference in order to be overcome. Our model and evaluation is applied to the medical domain because search within this domain is particularly challenging and, as we show, often requires inference. In addition, this domain features both structured knowledge resources as well as unstructured text. Our evaluation shows that inference can be effective, retrieving many new relevant documents that are not retrieved by state-of-the-art information retrieval models. We show that many retrieved documents were not pooled by keyword-based search methods, prompting us to perform additional relevance assessment on these new documents. A third of the newly retrieved documents judged were found to be relevant. Our analysis provides a thorough understanding of when and how to apply inference for retrieval, including a categorisation of queries according to the effect of inference. The inference mechanism promoted recall by retrieving new relevant documents not found by previous keyword-based approaches. In addition, it promoted precision by an effective reranking of documents. When inference is used, performance gains can generally be expected on hard queries. However, inference should not be applied universally: for easy, unambiguous queries and queries with few relevant documents, inference did adversely affect effectiveness. These conclusions reflect the fact that for retrieval as inference to be effective, a careful balancing act is involved. Finally, although the Graph Inference model is developed and applied to medical search, it is a general retrieval model applicable to other areas such as web search, where an emerging research trend is to utilise structured knowledge resources for more effective semantic search. 相似文献
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《Journal of Informetrics》2022,16(3):101318
References formulate the foundation and endorsements of scientific research. Using articles published in 2005 covered by Microsoft Academic Graph, the current paper defines and calculates five indicators of references, i.e., the number of references, the number of citations of references, the age of references, the number of nodes in a reference cascade (a multi-generation reference network), and the density of bibliographic coupling networks by references, and investigates their relations with the citation impact of the focal publication. A non-linear relationship is shown in all the five indicators; specifically, we observe two types of patterns, namely inverted-L and -U relations, both presenting the existence of critical points. We further explore the discipline-level differences of such a relationship and how it relates to the characteristics of the discipline itself. Among all five indicators, the effect of disciplinary academic “environments” is universally identified. We believe that the current paper provides insightful views to the discussion regarding the significance of a reference list. 相似文献