我国优秀青少年女子羽毛球运动员身体形态特征研究     

尹少丰  朱〓伟 《广州体育学院学报》2019,(6):83-85

CUBA联赛经过20年的开展，其职业水平和影响力不断提高，对于开展高校篮球运动、储备篮球后备人才、传播校园体育文化及提高高校知名度都起到积极的作用。通过文献资料法、数理统计法、录像观察法和逻辑分析法，对第20届CUBA男子四强在整个赛程的攻防指标进行对比分析，对于四支队伍存在的优劣势，提出合理化建议。  相似文献   

Author ranking evaluation at scale     

Marcel Dunaiski  Jaco Geldenhuys  Willem Visser 《Journal of Informetrics》2018,12(3):679-702

We evaluate author impact indicators and ranking algorithms on two publication databases using large test data sets of well-established researchers. The test data consists of (1) ACM fellowship and (2) various life-time achievement awards. We also evaluate different approaches of dividing credit of papers among co-authors and analyse the impact of self-citations. Furthermore, we evaluate different graph normalisation approaches for when PageRank is computed on author citation graphs.We find that PageRank outperforms citation counts in identifying well-established researchers. This holds true when PageRank is computed on author citation graphs but also when PageRank is computed on paper graphs and paper scores are divided among co-authors. In general, the best results are obtained when co-authors receive an equal share of a paper's score, independent of which impact indicator is used to compute paper scores. The results also show that removing author self-citations improves the results of most ranking metrics. Lastly, we find that it is more important to personalise the PageRank algorithm appropriately on the paper level than deciding whether to include or exclude self-citations. However, on the author level, we find that author graph normalisation is more important than personalisation.  相似文献   

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   

Making Video News Visible: Identifying the Optimization Strategies of the Cybermedia on YouTube Using Web Metrics     

Carlos Lopezosa  Enrique Orduna-Malea  Mario Pérez-Montoro 《Journalism Practice》2020,14(4):465-482

  相似文献   

温州经济发展存在的问题及对策——基于温杭甬台绍金经济指标的比较     

郑文秀 《温州职业技术学院学报》2014,(2):42-46

温州经济发展面临着“追兵渐近、标兵渐远”的态势。通过温杭甬台绍金在总量指标、质量指标、投资指标、出口指标和消费指标五大经济指标的比较分析发现，温州经济发展存在高商务成本、投资生态圈未戍形、中心城市扩容窄、物流平台拓展落后、深陷民间借贷和联保等问题。在当前重大转型升级期，温州应采取打好互保链这张牌，改善软环境，借城市经济“外推”服务业等切实有效的措施，用以助推温州经济进一步发展。  相似文献   

新浪微博替代计量指标特征分析   总被引：4，自引：1，他引：3  

余厚强  Bradley M.Hemminger  肖婷婷  邱均平 《中国图书馆学报》2016,42(4):20-36

通过对新浪微博替代计量指标进行统计分析,探索中文环境下替代计量指标的特征和规律。研究发现:新浪微博替代计量指标覆盖率不足1%,但由于追踪时间和追踪对象的局限,该数字可能被严重低估;新浪微博关注和讨论较多的论文来自"综合""生物化学、遗传学与分子生物学""保健科学""医学"及"生命科学"等学科;新浪微博替代计量指标的期刊分布满足对数曲线规律,除著名的综合性期刊如Nature等,预印本平台arXiv和开放存取期刊PLoS ONE等也获得了较多关注,生物学和医学的"明星期刊"最多;新浪微博主要关注最新论文,正式出版180天内受到关注的论文比例高达68.66%,同时也会关注经典论文;新浪微博发布者倾向宣传、推介和评论贴近生活、趣味性强、实用性高、涉及生命健康的学术论文,传递出引文无法体现的社会价值和学术价值;新浪微博替代计量指标呈现出显著的离散和集中分布特点,5.1%的学术论文获得了50%的新浪微博关注。此外,受新浪微博关注的论文在全球范围内获得远高于平均水平的关注度。  相似文献   

欧盟国家教育质量的框架、进展及其启示   总被引：1，自引：0，他引：1  

杨涛  辛涛 《比较教育研究》2011,(7):54-58

欧盟把教育作为其社会发展的基石之一,提高教育质量被认为是教育最核心的部分。为此,欧盟制定了衡量教育质量的框架,它包括16项核心指标以及5项可以量化的基准,并进一步利用科学有效的数据系统,对过去十年教育所取得的进展进行了有效的分析。尤其是,这一框架清晰地描述了欧盟整体以及各个国家在5项基准上的完成情况。在此基础上,欧盟提出了下一个十年欧盟教育继续发展的整体目标。欧盟在提升教育质量上的理念和措施为我国教育发展与改革提供了可资借鉴的经验。  相似文献   

Changes in Lithuanian Pre-school and Pre-primary Education Quality Over the Last Decade     

Ona Monkeviciene  Kristina Stankeviciene 《美中教育评论》2011,(1):119-130

  相似文献   

The contribution of PISA to the convergence of education policies in Europe          下载免费PDF全文

Alain Michel 《European Journal of Education》2017,52(2):206-216

The international comparative studies on students’ outcomes have initiated analyses that have had a growing influence on national and sub‐national education policies in industrialised and developing countries. It is particularly the case of the OECD's Programme for International Student Assessment (PISA) which started in 2000 and has organised surveys every 3 years, so that the 2015 survey was the 6^th. Its influence has been particularly important for several reasons: 1) it assesses the basic competences in reading literacy, maths and science of 15 year‐olds students, i.e. around the end of compulsory education in many countries; 2) the assessment is based on a reliable methodology and the tests are completed by qualitative surveys and studies; 3) and the results lead to recommendations and are amplified by the media in most countries. However, it is not easy to evaluate the real impact of PISA because of the existence of other international studies such as IEA's TIMSS and, particularly in Europe, the influence of the recommendations and benchmarks of the EU that has been growing steadily in the last 25 years. Our analysis of the impact of PISA and EU policy focuses on the evolution of the education policy in France, but also studies its evolution in a few other European countries. Finally, we underline the limits of the influence of PISA and international standards in education towards a convergence of education systems because of the importance of their specific historic and cultural contexts.  相似文献   

Gaps and Bits: Conceptualizing Measurements for Digital Divide/s   总被引：1，自引：0，他引：1  

Karine Barzilai-Nahon 《The Information Society》2006,22(5):269-278

Three arguments are raised in this article with regard to the indices used to measure the digital divide. First, I criticize policymakers who rely on simplistic measures of the digital divide, at the expense of a thoughtful analysis of (1) the purpose of the tool, (2) the level of observation, and (3) the method of approaching the data. Second, I argue that networks and associated technologies are not neutral artifacts but are political and social spaces in their structure as well as in their content levels. Accordingly, we need to factor in the context as an important actor in conceptualizing and measuring the digital divide. Third, two general types of indices are used for the measurement of the digital divide(s): focused monotopical indices and comprehensive indices. Monotopical indices are more widely available, while comprehensive ones are rare. I argue that policymakers need to promote comprehensive indices over monotopical indices. Finally, I present a conceptual definition of the digital divide and a framework for developing a comprehensive index to measure it.  相似文献