Identification of highly-cited papers using topic-model-based and bibliometric features: the consideration of keyword popularity     

《Journal of Informetrics》2020,14(1):101004

The number of received citations have been used as an indicator of the impact of academic publications. Developing tools to find papers that have the potential to become highly-cited has recently attracted increasing scientific attention. Topics of concern by scholars may change over time in accordance with research trends, resulting in changes in received citations. Author-defined keywords, title and abstract provide valuable information about a research article. This study performs a latent Dirichlet allocation technique to extract topics and keywords from articles; five keyword popularity (KP) features are defined as indicators of emerging trends of articles. Binary classification models are utilized to predict papers that were highly-cited or less highly-cited by a number of supervised learning techniques. We empirically compare KP features of articles with other commonly used journal-related and author-related features proposed in previous studies. The results show that, with KP features, the prediction models are more effective than those with journal and/or author features, especially in the management information system discipline.  相似文献   

Knowledge spillovers: Does the geographic proximity effect decay over time? A discipline-level analysis,accounting for cognitive proximity,with and without self-citations     

《Journal of Informetrics》2020,14(4):101072

This work analyzes the variation over time of the effect of geographic distance on knowledge flows. The flows are measured through the citations exchanged between scientific publications, including and excluding self-citations. To calculate geographic distances between citing and cited publication, each publication is associated with a “prevailing” territory, according to the authors’ affiliations. We then apply a gravity model to account for the research size of the territories, in terms of cognitive proximity of citing-cited publications. The field of observation is the 2010–2017 world publications citing the 2010–2012 Italian publications, as indexed in the Web of Science. The results show that in domestic knowledge flows, geographic proximity remains an influential factor through time, although with differences among disciplines and trends of attenuating effects. Finally, we replicate the analyses of knowledge flows but with the exclusion of self-citations: in this manner the effect of geographic proximity seems reduced, particularly at the national scale, but the differences (with vs without self-citations) lessen through time. As shown in previous works, the effect of distance on continental flows is modest (imperceptible for intercontinental flows), yet here too time has some influence, including concerning exclusion of self-citations.  相似文献   

布瑞尔学术出版社的商业模式     

郑保荣  刘道静 《出版科学》2007,15(6):64-67

作为一家规模不大、只专注某些特定学科出版领域的商业性学术出版社,布瑞尔通过精准的出版定位、战略性的产品布局、灵活多样的销售策略,在当今学术出版日益全球化,数字化和服务个性化的趋势中,走出了一条有自己特色的道路.  相似文献   

Extending WHIRL with background knowledge for improved text classification     

Sarah Zelikovitz  William W. Cohen  Haym Hirsh 《Information Retrieval》2007,10(1):35-67

Intelligent use of the many diverse forms of data available on the Internet requires new tools for managing and manipulating heterogeneous forms of information. This paper uses WHIRL, an extension of relational databases that can manipulate textual data using statistical similarity measures developed by the information retrieval community. We show that although WHIRL is designed for more general similarity-based reasoning tasks, it is competitive with mature systems designed explicitly for inductive classification. In particular, WHIRL is well suited for combining different sources of knowledge in the classification process. We show on a diverse set of tasks that the use of appropriate sets of unlabeled background knowledge often decreases error rates, particularly if the number of examples or the size of the strings in the training set is small. This is especially useful when labeling text is a labor-intensive job and when there is a large amount of information available about a particular problem on the World Wide Web.

Haym HirshEmail:

  相似文献   

职教课程开发的逆向思维——"宽基础、活模块"课程模式再论之二     

蒋乃平 《职业技术教育》2007,28(19):43-47

在KH模式研发过程中,推出了符合国情,适用于职业学校教育的横向集群、纵向集群两大类开发方法。“宽基础”和“活模块”的开发,均运用以就业为导向的逆向思维,均从职业对从业者素质的实际需要出发筛选、组织教学内容。“宽基础”是学生在一个职业群中择业、转岗、晋升的基础,着力于毕业生今后职业生涯发展;“活模块”是“零距离”上岗能力的强化,着力于毕业生首次就业顸岗能力的提高。  相似文献   

对职业教育几个概念的辨析   总被引：2，自引：0，他引：2  

壮国桢 《职业技术教育》2007,28(19):16-19

当前职业教育中“办学模式”、“人才培养模式”‘教学模式”三个概念使用频率较高,但存在严重的混用现象。三者概念的内涵与外延不同,存在层次上的差异,而又有相互包容的关系。在某种程度上,三者是宏观、中观和微观的关系。  相似文献   

论知识经济与高校创新型外语人才的培养     

梁卫华 《洛阳师范学院学报》2007,26(6):173-175

80年代末以前提出的具有"听说读写译"基本技能的工具型外语人才以及80年代末提出的既懂外语又懂某一专业知识的"复合型外语人才"已不能满足一些岗位的更高要求。知识经济时代需要有一批更为尖端的外语专业人才,即创新型人才,他们能在国际交流中独当一面,能够创新性地开展工作。本文首先指出知识经济环境下我国大学教育面临的普遍问题,在此基础上提出培养创新型外语人才的必要性,并对其培养模式作出有益的探讨。  相似文献   

Providing Bottom-Up Support to Middle School Science Teachers’ Reform Efforts in Using Inquiry-Based Kits     

Mark T. Jones  Charles J. Eick 《Journal of Science Teacher Education》2007,18(6):913-934

Middle grades science teachers need professional support in practice as they implement new inquiry-based science. Professional development schools can provide this bottom-up support through connecting preservice and inservice teacher education programs in classroom practice. In this study, coteaching arrangements with secondary science education majors provided additional teachers in the classroom to support a materials-rich curriculum and the needed associated pedagogies. Science education majors provided needed assistance in troubleshooting difficulties with the new curriculum. They also provided needed content knowledge to support inquiry, along with creating moments and space for teachers to reflect on inquiry practice. Ongoing assistance by preservice teachers allowed inservice teachers to progress from logistical concerns in implementing kit curriculum to concerns regarding student learning and the supporting professional development.

Charles J. EickEmail:

  相似文献   

高中英语写作技能培养模式研究     

廖光蓉  李正洁 《湖南师范大学教育科学学报》2007,6(4):115-119

高中英语写作技能的培养若只重写作结果或过程,或两者兼顾,都很难收到比较理想的效果.以篇章语言学的主述位、主位推进与扩展、句际与段际关系类型、衔接与连贯等理论为基础建立起来的"解读--讨论--模仿--构建"综合教学模式,注重感知、认识、学习、模仿和掌握篇章结构的宏观和微观层面的知识体系,如信息结构、主题思想、主位的推进与扩展、细节的逻辑安排、句际间的衔接、意思的连贯、结构的层次安排等,在此基础上再建构语篇、培养写作技能,效果可能会要好一些.  相似文献   

隔爆对旋式局部通风机控制磁力起动器的研究     

李德俊 《北京工业职业技术学院学报》2007,6(3):5-8

煤矿井下局部通风机是保证煤矿井下安全生产的重要设备.对旋局部通风机是一种用途广泛的新型局部通风机,具有结构紧凑、噪音小、效率高、反风性能好的特点.研制与其配套的起动和控制设备是十分必要的.  相似文献