Four pitfalls in normalizing citation indicators: An investigation of ESI’s selection of highly cited papers     

Zhigang Hu  Wencan Tian  Shenmeng Xu  Chunbo Zhang  Xianwen Wang 《Journal of Informetrics》2018,12(4):1133-1145

InCites Essential Science Indicators is becoming increasingly used to identify top-performing research and evaluate the impact of institutes. Unfortunately, our study shows that ESI indicators, as well as other normalized citation indicators, have the following flaws. First, the publication month and the online-to-print delay affect a paper’s probability of becoming a Highly Cited Paper (HCP). Papers published in the earlier months of the year are more likely to accumulate enough citation counts to rank at the top 1% compared with those published in later months of the year. Papers with longer online-to-print delays have an apparent advantage for being selected as HCPs. Research field normalizations lead to the third pitfall. Different research fields have different citation thresholds for HCPs, making research field classification important for a journal. In addition, the uniform thresholds for both articles and reviews in ESI affect the reliability of HCP selection because, on average, reviews tend to have higher citation rates than articles. ESI’s selection of HCPs provides an intuitive feel for the problems of normalized citation impact indicators, such as those provided in InCites and SciVal.  相似文献   

Proximal advantage in knowledge diffusion: The time dimension     

Jue Wang  Liwei Zhang 《Journal of Informetrics》2018,12(3):858-867

This paper intends to explore the impact of geographic proximity on the diffusion of knowledge in the form of publication citations, and argues that codified knowledge is transmitted faster in proximity and is subject to similar geographic constraints as tacit knowledge. The geographic proximity advantage would be particularly relevant in the early stage of dissemination. We collected three sets of research articles published in 1990, 2000 and 2010 and compared the longitudinal citations they received domestically and from abroad. The study found that domestic citations accumulate faster and reach their peak much earlier than foreign citations, and the difference is most evident in the first few years after publication. The result shows that geographic proximity does play a role in the speed of knowledge diffusion and points to the network effect for citations. Those located closer to the knowledge origin would be exposed and react to publications faster due to the additional opportunities of research exchange and network.  相似文献   

物理课的预习方法     

阳水连 《物理教学探讨》2005,23(24):13

物理课的预习是课堂学习的“添加”和“催化”剂,现给同学们介绍几种预习方法,供参考。1标号法在上新课之前,大家应认真阅读新课,并且在课文中的重点句子下面标符号。例如,在预习《光的直线传播》这一课时,在“光在同一种物质里传播的路线是直的”这句话中“同一种物质”,“直”这六个字下面画小黑点,或画红线。又如在预习《电压》这一课时,对“电压是使自由电荷发生定向移动形成电流的原因”这句话不理解,可在这句话的后面画一个问号,以便上课时集中精力听老师讲解其含义,或者向老师提出此问题,请老师解答。2分析法上新课前同学们应根据本…  相似文献   

《机械能》单元检测题     

王勤国  乔记生 《物理教学探讨》2005,23(6):22-25

一、选择题 1.关于机械能守恒定律的适用条件,下列说法中正确的是( )  相似文献   

关于算子(.V)的广义四则运算的图象实现     

杨炳良 《湖州师范学院学报》1990,(6)

本文主要给出实数集R上的一般Fuzzy集关于算子(·V)的四则运算的作图方法.  相似文献   

语文多媒体教学设计之初探     

刘丽荣 《中国教育技术装备》2004,(6):34-35

阐述了如何优化语文多媒体教学课件设计的几个方面。  相似文献   

字母歌     

星星番茄  王月 《顽皮娃娃》2006,(2):22-23

  相似文献   

加快黄冈新型工业化进程的对策研究     

王梓林 《黄冈职业技术学院学报》2006,8(2):21-24

黄冈经济是以传统产业为主导,在推进新型工业化进程中,存在着技术水平低、产业集中度低、科技投入不足、创新能力不强等问题。本文认为,黄冈经济发展要把握重点产业,推动产业集群发展;以信息化推进黄冈工业化;加速城镇化,提高城市经营水平;全面发展服务业,提高为工业化和人民生活服务的能力;加大制度创新、科技创新和管理创新力度,走一条跨越式的工业化发展道路。  相似文献   

国家精品课程网上资源可及性评估研究   总被引：1，自引：0，他引：1  

王佑镁 《高等工程教育研究》2007,(3):118-120,132

参照由WAI提出的网络内容可及性标准1.0,借助于Bobby Online的在线评价工具及人工检测工具,采用抽样调查法来对2003～2005年度国家精品课程的网上资源进行了可及性检测和评价分析,结果发现10%的网上资源在可及性测试中获得比较理想的指数,大多数网上资源都有网页可及性错误.通过可及性参数分析与评估可以为高校精品课程网上资源建设提供依据和参考指标.  相似文献   

从孔子相貌引出的历史研究     

杨莉 《历史教学(高校版)》2007,(10):25-26

岳麓版必修三第一课是“孔子与老子”，在研究了2007年广东高考历史试题的基础上，我对本课教学设计了这样的环节：  相似文献