Technological research in the EU is less efficient than the world average. EU research policy risks Europeans’ future     

Alonso Rodríguez-Navarro  Ricardo Brito 《Journal of Informetrics》2018,12(3):718-731

We have studied the efficiency of research in the EU by a percentile-based citation approach that analyzes the distribution of country papers among the world papers. Going up in the citation scale, the frequency of papers from efficient countries increases while the frequency from inefficient countries decreases. In the percentile-based approach, this trend, which is uniform at any citation level, is measured by the e_p index that equals the P_{top 1%}/P_{top 10%} ratio. By using the e_p index we demonstrate that EU research on fast-evolving technological topics is less efficient than the world average and that the EU is far from being able to compete with the most advanced countries. The e_p index also shows that the USA is well ahead of the EU in both fast- and slow-evolving technologies, which suggests that the advantage of the USA over the EU in innovation is due to low research efficiency in the EU. In accord with some previous studies, our results show that the European Commission’s ongoing claims about the excellence of EU research are based on a wrong diagnosis. The EU must focus its research policy on the improvement of its inefficient research. Otherwise, the future of Europeans is at risk.  相似文献   

Quiet eye training aids the long-term learning of throwing and catching in children: Preliminary evidence for a predictive control strategy     

C. A. L. Miles  S. J. Vine  J. N. Vickers  M. R. Wilson 《European Journal of Sport Science》2017,17(1):100-108

Abstract

Quiet eye training (QET) may be a more effective method for teaching children to catch than traditional training (TT) methods, but it is unclear if the benefits accrued persist in the long term. Thirty children were randomly allocated into a QET or TT group and, while wearing a mobile eye tracker, underwent baseline testing, training and two retention tests over a period of eight weeks, using a validated throw and catch task. During training, movement-related information was provided to both groups, while the QET group received additional instruction to increase the duration of their targeting fixation (QE1) on the wall prior to the throw, and pursuit tracking (QE2) period on the ball prior to catching. In both immediate (R1) and delayed (R2, six weeks later) retention tests, the QET group had a significantly longer QE1 duration and an earlier and longer QE2 duration, compared to the TT group, who revealed no improvements. A performance advantage was also found for the QET compared to the TT group at both R1 and R2, revealing the relatively robust nature of the visuomotor alterations. Regression analyses suggested that only the duration of QE1 predicted variance in catch success post-training, pointing to the importance of a pre-programming visuomotor strategy for successful throw and catch performance.  相似文献   

基于卡尔曼滤波的PS-InSAR地表形变预测方法     

刘星  吕孝雷 《中国科学院大学学报》2017,34(6):743-750

PS-InSAR是用于监测大范围地表形变的微波遥感技术，可提供精确地表形变信息，但该技术无法对形变趋势进行预测。现有形变预测方法只能预测少数监测点的形变，不适用于大面积预测。针对这些问题，提出一种基于卡尔曼滤波的PS-InSAR地表形变预测方法。结合PS-InSAR方法的技术流程，从理论上推导设计卡尔曼滤波器，通过真实的多时相SAR数据对该方法进行验证。实验结果表明，该算法可充分利用PS-InSAR形变监测信息，有效预测大面积观测区域的形变趋势。  相似文献   

单点与双点拉剪点焊试样的疲劳特性比较   总被引：1，自引：0，他引：1  

WANG Rui-jie  SHANG De-guang  LI Li-sen  LI Cheng-shan 《实验室研究与探索》2007,(10)

对单点与两点焊拉剪点焊疲劳试样分别进行了疲劳试验,观测了疲劳裂纹的形状和萌生位置,分析了两种试样的疲劳性能。通过有限元模型分析了同等载荷作用下两种试样的变形,对比两种试样的载荷幅寿命关系,认为两点试样的承载能力约为单点试样的两倍。基于此,使用单点试样的载荷幅寿命曲线,预测了两点试样的疲劳寿命,寿命预测结果与实验寿命结果一致。  相似文献   

Beyond Journal Impact and Usage Statistics: Using Citation Analysis for Collection Development     

Wenli Gao 《期刊图书馆员》2016,70(1-4):121-127

This article outlines a methodology to generate a list of local core journal titles by doing a citation analysis and details the process for retrieving and downloading data from Scopus. It analyzes correlations among citation count, journal rankings, and journal usage. The results of this study reveal significant correlations between journal rankings and journal usage. No correlation with citation count has been found. Limitations and implications for collection development and outreach are also discussed.  相似文献   

女书字数统计与异体字处理     

赵丽明 《内江师范学院学报》2007,22(3):20-23

女书异体字的概念不同于汉字异体字.女书是汉字的一种变体,其文字性质已由表意文字变成表音文字,即音节字符表音文字.女书记录语言是采用同音假借的方法,用一个汉字变体音节字符,标记一组同音字、近音字.我们采用了字位理论来处理异体字问题.即在一字多形的情况下,在没有区别意义的异体字中,造字来源上是同源字,基本结构、主体轮廓相同,只是书写上附笔差异,不影响交际.经过字位处理,取使用频率最高的常用字形作为基本字.  相似文献   

辽河柴油十六烷指数的预测     

赵占春 《连云港职业技术学院学报》2003,16(2):18-20

十六烷值是衡量柴油质量的重要指标,本文给出了利用生产数据对辽河柴油进行十六烷指数计算公式.  相似文献   

Talent identification and selection in elite youth football: An Australian context     

Donna O'Connor  Paul Larkin  A. Mark Williams 《European Journal of Sport Science》2016,16(7):837-844

We identified the perceptual–cognitive skills and player history variables that differentiate players selected or not selected into an elite youth football (i.e. soccer) programme in Australia. A sample of elite youth male football players (n?=?127) completed an adapted participation history questionnaire and video-based assessments of perceptual–cognitive skills. Following data collection, 22 of these players were offered a full-time scholarship for enrolment at an elite player residential programme. Participants selected for the scholarship programme recorded superior performance on the combined perceptual–cognitive skills tests compared to the non-selected group. There were no significant between group differences on the player history variables. Stepwise discriminant function analysis identified four predictor variables that resulted in the best categorization of selected and non-selected players (i.e. recent match-play performance, region, number of other sports participated, combined perceptual–cognitive performance). The effectiveness of the discriminant function is reflected by 93.7% of players being correctly classified, with the four variables accounting for 57.6% of the variance. Our discriminating model for selection may provide a greater understanding of the factors that influence elite youth talent selection and identification.  相似文献   

紫外线的应用、预报及其预防     

南景宇  岳建一 《河北北方学院学报(社会科学版)》2003,19(3):15-19

随着现代科学技术的进步,紫外技术已得到广泛应用和发展,人类对紫外线的认识越来越全面,对紫外线的预报和预防越来越重视,紫外线与人们日常生活的关系也越来越紧密。然而,在《大学物理》、《光学》等教程中却很少涉及有关紫外线方面的内容,文章力图向大家介绍有关这方面的情况。  相似文献   

三亚邮轮旅游市场潜力预测     

鲍富元 《洛阳师范学院学报》2011,30(7):126-128

邮轮旅游是国际旅游业中增长幅度较大的业务之一,三亚的邮轮旅游自凤凰岛国际邮轮码头投入使用以来,发展也步入快车道。通过三次指数平滑法对三亚旅游市场的总游客人数进行预测,并在此基础上结合国际经验中邮轮游客占总游客量的比率,进一步估测三亚邮轮旅游的游客市场规模。预测显示三亚邮轮旅游市场的发展潜力巨大,增长速度较快,为深入推动三亚邮轮旅游市场发展提供了保证。  相似文献