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1.
在当前我国推行文化强国和数字中国建设的政策背景下,在数字经济发展外延的社会趋势下,发展数字藏品成为近年来不可阻挡的潮流。本文通过了解高校博物馆当前发展状况,综合分析数字藏品在高校博物馆中的传播价值、共享价值、教研价值、纪念价值与社交价值,对数字藏品进行有针对性的价值发掘,进而探寻数字藏品在高校博物馆中的价值实现路径,力图助力高校博物馆摆脱当前发展掣肘,提高资源利用效率,探索新的发展道路,助力国家健全公共文化服务体系,提高群众文化自信。 相似文献
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印本和电子期刊已成为高校师生获取信息的主流渠道,二元并存格局的形成有其客观必然性。以此为前提,根据经济学中的边际效用价值论,依照检索用户效用需求固有的特点,分析其在信息检索过程中面临的约束条件和检索路径选择机制,从而找到提高用户效用值的路径。 相似文献
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通过获取混合动力汽车驱动系统技术领域的专利属性数据和引用关系数据,应用前期研究所形成的识别算法与可视化方法体系,绘制专利引文网络可视化图谱并从中识别技术演进路径,综合数据资料对技术演进路径图谱进行解读,展示混合动力汽车驱动系统技术发展的历史脉络,识别新技术演进路径的产生可能性与发展方向.对我国相关领域的发展战略提供决策参考. 相似文献
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《Journal of Informetrics》2019,13(4):100977
Main path analysis is a popular method for extracting the backbone of scientific evolution from a (paper) citation network. The first and core step of main path analysis, called search path counting, is to weight citation arcs by the number of scientific influence paths from old to new papers. Search path counting shows high potential in scientific impact evaluation due to its semantic similarity to the meaning of scientific impact indicator, i.e. how many papers are influenced to what extent. In addition, the algorithmic idea of search path counting also resembles many known indirect citation impact indicators. Inspired by the above observations, this paper presents the FSPC (Forward Search Path Count) framework as an alternative scientific impact indicator based on indirect citations. Two critical assumptions are made to ensure the effectiveness of FSPC. First, knowledge decay is introduced to weight scientific influence paths in decreasing order of length. Second, path capping is introduced to mimic human literature search and citing behavior. By experiments on two well-studied datasets against two carefully created gold standard sets of papers, we have demonstrated that FSPC is able to achieve surprisingly good performance in not only recognizing high-impact papers but also identifying undercited papers. 相似文献
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K. S. Yakovlev 《Scientific and Technical Information Processing》2010,37(6):438-447
Existing and prospective approaches and methods are considered for path planning in a plane. The existing planning algorithms
are analyzed and qualitatively assessed. A new efficient path-planning algorithm, HGA*, is described, which enables searching
for a plan under conditions of limited time and computational resources and under additional constraints (such as the dynamic
changes and partial observability of the planning terrain). The results are presented, which show the experimentally proven
advantages of HGA* over the available analogues. 相似文献
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学术创新的扩散过程研究 总被引：2，自引：2，他引：0
知识扩散能促进知识创新,从过程而非结果的视角研究学术创新的扩散,能够还原学术发展的轨迹,为学术研究及科研管理提供可靠依据。本文选取结构洞理论为学术创新实例,采用包含时间维度的扩散理论和分析时间流的主路径分析方法进行创新扩散实证研究。通过建立扩散时序网络,分析扩散曲线、路径与关键节点和学科分布与信息交互模式,定义扩散广度、速度、强度及延时,并进行测度,认为可将创新扩散过程研究归纳为五个步骤,其内容涵盖研究方法与分析维度、分析层次和分析视角的整合。 相似文献
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2008年中国传播学理论研究概述 总被引：1，自引：0，他引：1
2008年,传播学者一方面对改革开放30年来传播学研究取得的成果进行总结,另一方面叉在传播实践的基础上,对知识社会学的地位,传播学本土化的路径、西方经典传播学理论的局限以及传播理论在中国新的传播语境下研究的新进路进行了探析和反思. 相似文献
8.
关键技术是指在技术领域中占据重要地位、反映技术发展趋势并具有引领作用的重要技术。运用基于专利引文分析的关键路径方法、岛群方法和高被引方法以全息摄影技术领域为例对关键技术挖掘方法进行理论分析和实证研究,比较这三种方法在关键技术挖掘中的作用及局限,在此基础上探讨将这三种方法相结合进行关键技术挖掘的可行性。 相似文献
9.
《Journal of Informetrics》2022,16(1):101242
Main path analysis (MPA) is the most widely accepted approach to tracing knowledge transfer in a research field. In this study, we extracted multiple longest paths from the multidisciplinary academic field's citation network and integrating topic modeling to the extracted paths. We consider three main aspects of trajectory analysis when analyzing the represented documents through the extracted paths: emergence, authority, and topic dynamics. For path extraction, we adopt the longest path algorithm that consists of the following three steps: 1) topological sort, 2) edge relaxation, and 3) multiple path extraction. For topic integration into multiple paths, we employ latent Dirichlet allocation (LDA) by utilizing the topic-document matrix that LDA derives to select an article's topic from the citation network, where each article is labeled with the topic that is assigned with the highest topical probability for that article. We conduct a series of experiments to examine the results on a dataset from the field of healthcare informatics that PubMed provides. 相似文献
10.
《Journal of Informetrics》2020,14(2):101014
In the modern world, science and technology jointly determine the evolutionary path of scientific innovation, with an increasingly close relationship between them. Therefore, it is important to study the identification method of the innovation path, based on the linkage of topics in science and technology. This study focuses on connected topics utilizing bibliometric analysis, thereby exploring the identification method for innovation paths based on the linkage of scientific and technological topics. The internal mechanism of knowledge dissemination and the relationship between science and technology are revealed and described in detail by measuring the linkage of knowledge units. For practical bibliometric analyses, research papers and patent literature were used to characterize scientific research and technological research to reveal the innovation path for the interaction of science and technology quantitatively, automatically, and visually. Experimental study shows that analysis of the topic-linked path of science and technology, along with the integration of multi-relationships, can effectively identify important science- and technology-related topics in a field in the evolution process, and help grasp the key points of basic research and applied research. 相似文献
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[目的/意义]文章对科技政策隐性扩散路径自组织方法进行研究,挖掘科技政策文本包含深层语义信息,将隐性知识显性化,为科研人员拓展和丰富政策扩散路径研究提供参考。[方法/过程]本文结合科技政策篇章文本的形式语义和内容语义两个方面对政策文本结构化处理和深度挖掘,对政策文本资源全解析,抽取科技政策文本中包含的特征,其中包括概念和关系自动获取与标引技术、网络表示学习,挖掘科技政策文本中的隐含结构信息,利用BiLSTM-CRF模型的深度学习方法实现概念的自动获取和自动标引关系。将得到多篇科技政策文本的概念和关系组成概念关系对的形式,借助于表示学习的方法发现每个节点稠密的向量表示。[结果/结论]通过实验验证,证明了本文借助隐性路径特征的科技政策扩散隐性路径自组织方法的有效性,在一定程度上拓展了政策研究的方法,为科研人员在政策扩散研究上提供了参考。 相似文献
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We first present in this paper an analytical view of heuristic retrieval constraints which yields simple tests to determine
whether a retrieval function satisfies the constraints or not. We then review empirical findings on word frequency distributions
and the central role played by burstiness in this context. This leads us to propose a formal definition of burstiness which
can be used to characterize probability distributions with respect to this phenomenon. We then introduce the family of information-based
IR models which naturally captures heuristic retrieval constraints when the underlying probability distribution is bursty
and propose a new IR model within this family, based on the log-logistic distribution. The experiments we conduct on several
collections illustrate the good behavior of the log-logistic IR model: It significantly outperforms the Jelinek-Mercer and
Dirichlet prior language models on most collections we have used, with both short and long queries and for both the MAP and
the precision at 10 documents. It also compares favorably to BM25 and has similar performance to classical DFR models such
as InL2 and PL2. 相似文献
16.
共引分析理论与实践进展 总被引：22，自引：0，他引：22
共引分析是一种重要的情报研究方法。系统总结了共引分析理论与方法的发展过程; 分析了共引分析在应用和实践层面,特别是科学结构揭示方面的进展。参考文献15。 相似文献
17.
In this essay, we outline the defining characteristics of the rhetoric of atonement and argue that it as an identifiable sub‐genre of apologia. In building this argument, we examine the purposive and situational constraints that lead to atonement and argue that atonement rhetoric can be defined based on five characteristics. We use an analysis of several instances in which President Clinton relied upon atonement to illustrate the power and function of the sub‐genre. 相似文献
18.
There is a wide set of evaluation metrics available to compare the quality of text clustering algorithms. In this article,
we define a few intuitive formal constraints on such metrics which shed light on which aspects of the quality of a clustering
are captured by different metric families. These formal constraints are validated in an experiment involving human assessments,
and compared with other constraints proposed in the literature. Our analysis of a wide range of metrics shows that only BCubed satisfies all formal constraints. We also extend the analysis to the problem of overlapping clustering, where items can simultaneously
belong to more than one cluster. As Bcubed cannot be directly applied to this task, we propose a modified version of Bcubed
that avoids the problems found with other metrics.
相似文献
| Felisa VerdejoEmail: |
19.
《Journal of Informetrics》2022,16(2):101281
Main Path Analysis (MPA) is widely used to trace the developmental trajectory of a technological field through a citation network. The citation-based traversal weight is usually utilized to cherry-pick the most significant path. However, the theme of documents along a main path may not be so coherent, and it is very possible to miss the main paths of significant sub-fields overall in a domain. Furthermore, the global path search algorithm in conventional MPA also suffers from high space complexity due to the exhaustive strategy. To address these limitations, a new method, named as semantic MPA (sMPA), is proposed by leveraging semantic information in two steps of candidate path generation and main path selection. In the meanwhile, the resulting source code can be freely accessed. To demonstrate the advantages of our method, extensive experiments are conducted on a patent dataset pertaining to lithium-ion battery in electric vehicle. Experimental results show that our sMPA is capable of discovering more knowledge flows from important sub-fields, and improving the topical coherence of candidate paths as well. 相似文献
20.
终端定位:电视购物的运营变革 总被引：1，自引：0，他引：1
将电视购物作为消费终端这一定位的澄清,将直接导致电视购物从"广告"到"终端"的运营变革,在此基础上,再提出电视购物的规范管理对策,是电视购物走出低谷的一个有效路径。 相似文献