共查询到20条相似文献，搜索用时 203 毫秒
1.
数字图书馆研究进展——基于LISA数据库的文献计量分析 总被引：2，自引：0，他引：2
本文运用文献计量学方法,以LISA为数据来源,获得有关数字图书馆的研究文献,并从文献量、著者、核心期刊等角度进行统计和分析,同时采用词干网对叙词进行网络化处理,以定量数据从侧面反映数字图书馆研究的发展情况。 相似文献
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[目的/意义]现有的关键词提取方法不适应社会化问答社区文本长度较短、内容表述口语化、数据集稀疏的特点,且很少考虑用户关注程度对词语重要性的影响,不能有效地提取此类文本的关键词,因此,提出针对社会化问答社区的多属性加权关键词提取方法。[方法/过程]多属性加权关键词提取方法通过引入调节函数和词性对传统TF-IDF进行改进,并通过线性加权融合用户回答数、关注数、浏览数以及评论数4个用户关注属性来综合度量词语权重。[结果/结论]实验表明,该方法能更有效地提取社会化问答社区文本的关键词。 相似文献
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[目的/意义]对知识网络中结构关系的有效识别与提取，有助于从纷繁的数据中探测知识网络的拓扑结构及其演化模式。[方法/过程]本文提出一种基于邻接矩阵特征分解的知识网络结构关系提取方法。基于真实数据分别从静态结构关系提取和动态结构演化两个方面，对特征分解法和传统关联频度法进行对比分析，并与Pathfinder算法进行对比。对基于特征分解法提取知识网络结构关系的有效性进行验证。[结果/结论]研究结果表明：特征分解法能够识别原始知识网络中的主要成分信息，能够准确识别低频次的对网络整体拓扑结构较为重要的关联关系，且提取方法灵活自由。 相似文献
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针对现有的元数据提取方法提取精度不高且适应能力较差的问题,本文提出一种基于度量级融合的论文元数据提取方法.首先,提取论文首部的特征,利用已标注的数据集对HMM、SVM和CRF三种统计学习方法进行训练,生成相应的元数据提取模型;然后,根据贝叶斯判决理论推导出和规则,并利用和规则对三种提取模型产生的后验概率进行融合决策,实现论文元数据的提取;最后,通过设定时间段和文档数阈值,采用基于时间段统计的方法动态更新三种提取模型,以确保模型的有效性.在不同的数据集上对各种提取方法的性能进行了实验对比,结果表明,本文提出的方法不仅提高了元数据提取精度,而且具有较强的适应能力. 相似文献
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目的：在蒙药制剂檀香与肉豆蔻组对用药时,对混合提取工艺问题进行研究。方法：采用单独和混合两种提取方式对提取物进行色谱及相关分析比较,并对提取工艺过程细节进行观察分析。结果：两组分单独提取与混合提取的提取物成分存在差异,而且目前采取的收得挥发油后水提液直接浓缩工艺提取法,使提取物中的易挥发脂性部分蒸发损失。结论：对制剂提取工艺采用间歇式方法,先收取析出的脂状物,再进行浓缩较为合理。 相似文献
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目的：在蒙药制剂檀香与肉豆蔻组对用药时,对混合提取工艺问题进行研究。方法：采用单独和混合两种提取方式对提取物进行色谱及相关分析比较,并对提取工艺过程细节进行观察分析。结果：两组分单独提取与混合提取的提取物成分存在差异,而且目前采取的收得挥发油后水提液直接浓缩工艺提取法,使提取物中的易挥发脂性部分蒸发损失。结论：对制责时提取工艺采用间歇式方法。先收取析出的脂状物,再进行浓缩较为合理。 相似文献
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随着Web网页数量的爆炸式增长和网页噪声不断增多,网上获取重要信息变得越来越困难.本文从一个新的角度,提出了一种基于自然标注的网页信息抽取方法.依据这种方法,首先对网页进行聚类,提取具有相似结构的网页并进行相同的标注,然后采用SVM对抽取项进行训练,最后提取到需要抽取的数据.文章的主要贡献在于对网页中的自然标注进行分析和发现,给出了九大类自然标注的例子,并结合聚类和支持向量机,给出了训练方法.从实验结果上看,本方法优于其他方法. 相似文献
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潜在语义分析（LSA）是一种自动实现知识提取和表征的理论和方法。论文着重介绍了LSA的基本思想、特点、实现方法、主要应用和研究前景 相似文献
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数据挖掘是一种新的信息处理技术,其主要特点是对企业数据库中的大量业务数据进行抽取、转换、分析和其他模型化处理,提取辅助经营决策的关键性数据,在企业信息化建设中应用前景广阔。 相似文献
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Employee book clubs are simple, inexpensive tools for professional development that may be more effective than traditional training methods. Library staff at Brigham Young University participated in professional development book clubs, and they reported that they found these trainings to be more enjoyable than classroom-style trainings and more effective in helping them understand, retain, and apply the principles learned. This article will discuss the success of these book clubs and suggest ways that other libraries can implement cost-effective book clubs to develop professional and leadership skills. 相似文献
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A. N. Shogin M. G. Alpatova I. P. Zhuravleva O. L. Oleinikova 《Scientific and Technical Information Processing》2013,40(1):58-62
This article describes methods and tools for the implementation of a dictionary (inverse file) as an intrinsic element of an information-retrieval system that is designed for on-line user searches. The methods and tools for increasing the IRS efficiency as a whole and the dictionary in particular are described. The authors discuss the principles of the compilation of stop-word lists and algorithmic verification of vocabulary while generating a dictionary. 相似文献
13.
当“近代早期书籍”(early modern book)遇上“数字工具”,它们会发生怎样的化学反应?关于这一议题,目前的讨论集中在两个层面:“获取”和“文本”。文章以早期英语图书在线、福尔杰莎士比亚图书馆等机构的数字化馆藏为例,对上述两个议题进行讨论。如果数字工具可以帮助我们拉远与书籍的距离,重新认识这一习以为常的事物,或许可以藉此学到一些意料之外的新知识。 相似文献
14.
Crystal Renfro 《The Journal of Academic Librarianship》2017,43(2):95-99
An academic librarian, especially one who works primarily in a research consultation capacity, often encounters individuals who are seeking in-depth help with research projects that they struggle to explain. The number of concepts, interdependencies and assumptions involved in research projects today can make them difficult to define and discuss with other people. The multidisciplinary nature and globalization of many areas of research is forcing researchers to not only discuss, but to collaborate with many others from different academic backgrounds and disparate physical locations. Many researchers struggle with project paralysis at various points along the way as they attempt to manage both the myriad of details and the bigger picture relationships and implications of their project.A number of visual tools including concept mappers and mind mappers are well suited to help advanced students, faculty, researchers and librarians to organize the ideas and knowledge throughout the various stages of complex research, from envisioning an idea to the early stages of actively researching and documenting research findings. This paper will discuss the potential uses of visual mapping tools and review the current state of academic literature surrounding the topics of mind mapping and concept mapping. 相似文献
15.
2002年至2007年间,DFG资助德国卡尔斯鲁厄大学图书馆开发了Bib Tip推荐系统,它是一种有益于增加图书馆目录参考分量的工具。BibTip应用了Web2．0技术,有利于读者向导门户——图书馆目录的开发。BibTip是在统计模式的基础上建立起来的,它可以引导读者用户从检索一条书目记录而附带检索到目录中拥有的相似文献记录。文章对卡尔斯鲁厄大学的Bib Tip进行了介绍,并对其在图书馆中的应用进行了研究。 相似文献
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Matthew B. Hoy 《Medical reference services quarterly》2018,37(3):300-305
In recent years, the amount of video content created and uploaded to the Internet has grown exponentially. Video content has unique accessibility challenges: indexing, transcribing, and searching video has always been very labor intensive, and there were no automated ways of searching videos for specific content. New software tools that use deep learning methods are automating some of these processes, making video content more discoverable and useful. There are also many new tools for processing and manipulating video in interesting ways. This column will briefly discuss the idea of deep learning and how deep learning tools can be used to transcribe, translate, search, and even manipulate videos. It will suggest ways that librarians can use these tools to help their institutions better manage video content. It also includes a list of video-related software tools. 相似文献
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Information retrieval systems operating on free text face difficulties when word forms used in the query and documents do not match. The usual solution is the use of a “stemming component” that reduces related word forms to a common stem. Extensive studies of such components exist for English, but considerably less is known for other languages. Previously, it has been claimed that stemming is essential for highly declensional languages. We report on our experiments on stemming for German, where an additional issue is the handling of compounds, which are formed by concatenating several words. The major contribution of our work that goes beyond its focus on German lies in the investigation of a complete spectrum of approaches, ranging from language-independent to elaborate linguistic methods. The main findings are that stemming is beneficial even when using a simple approach, and that carefully designed decompounding, the splitting of compound words, remarkably boosts performance. All findings are based on a thorough analysis using a large reliable test collection. 相似文献
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Robin Patric Clair Pamela A. Chapman Adrianne W. Kunkel 《Journal of Applied Communication Research》2013,41(4):241-259
In this paper we discuss narrative from both a theoretical and pedagogical perspective. After briefly reviewing the theoretical possibilities of narrative for addressing the problem of sexual harassment, we discuss how feminist pedagogy both draws from and advances our notions of narrative. We then focus on three forms of narrative as they are used to raise consciousness concerning the issue of sexual harassment. The three specific approaches include: (1) the personal narrative, (2) the case study, and (3) the interactive narrative or collective story. After providing illustrations of these three approaches as they are used in academic settings, we explore the possibility that utilizing these approaches might provide heuristic tools for the classroom instructor, useful strategies for the workplace practitioner, and insight into the theoretical exploration of sexual harassment. 相似文献
19.
Rob Kairis 《Library Collections, Acquisitions, and Technical Services》2012,36(1-2):30-38
While consortia have been successful in cooperating among members for the purpose of sharing electronic resources, they have struggled to extend that level of cooperation to print materials. OhioLINK is investigating methods to accomplish this goal. This paper expands on that initiative and presents a method for creating a shared approval plan for purchasing U.S. university press titles. It presents a subject-based solution stemming from a prior research initiative with OCLC for establishing financial commitments and randomized ownership of materials to be shared among consortium member libraries. This study projects results of this method by applying a prior year's publication output. The results do not describe a perfect plan but one worth exploring as a means to cooperatively purchase and share print books. 相似文献
20.
《Journalism Practice》2013,7(10):1220-1240
In recent years, the rapid expansion of Web 2.0 tools has opened new possibilities for audience participation in news, while “engagement” has become a media industry buzzword. In this study, we explore approaches to engagement emerging in the field based on in-depth interviews with editors at a range of news outlets from several countries, and we map these approaches onto the literature on participatory journalism and related innovations in journalism practice. Our findings suggest variation in approaches to engagement that can be arrayed along several related dimensions, encompassing how news outlets measure and practice it (e.g. with the use of quantitative audience metrics methods), whether they think about audiences as more passive or more active users, the stages at which they incorporate audience data or input into the news product, and how skeptically or optimistically they view the audience. Overall, while some outlets are experimenting with tools for more substantive audience contributions to news content, we find few outlets approaching engagement as a way to involve users in the creation of news, with most in our sample focusing mostly on engaging users in back-end reaction and response to the outlet’s content. We identify technological, economic, professional, and organizational factors that shape and constrain how news outlets practice “engagement.” 相似文献