Unbiased evaluation of ranking metrics reveals consistent performance in science and technology citation data

Despite the increasing use of citation-based metrics for research evaluation purposes, we do not know yet which metrics best deliver on their promise to gauge the significance of a scientific paper or a patent. We assess 17 network-based metrics by their ability to identify milestone papers and patents in three large citation datasets. We find that traditional information-retrieval evaluation metrics are strongly affected by the interplay between the age distribution of the milestone items and age biases of the evaluated metrics. Outcomes of these metrics are therefore not representative of the metrics’ ranking ability. We argue in favor of a modified evaluation procedure that explicitly penalizes biased metrics and allows us to reveal metrics’ performance patterns that are consistent across the datasets. PageRank and LeaderRank turn out to be the best-performing ranking metrics when their age bias is suppressed by a simple transformation of the scores that they produce, whereas other popular metrics, including citation count, HITS and Collective Influence, produce significantly worse ranking results.     

关于一类特殊的射影平坦的（α,β）度量的构造

构造了含五个参数的F=α＋β形式的（α,β）度量,给出其射影平坦的条件,并计算了此种条件下的旗曲率。     

Comparison of two article-level,field-independent citation metrics: Field-Weighted Citation Impact (FWCI) and Relative Citation Ratio (RCR)

We reproduce the article-level, field-independent citation metric Relative Citation Ratio (RCR) using the Scopus database, and extend it beyond the biomedical field to all subject areas. We compare the RCR to the Field-Weighted Citation Impact (FWCI), also an article-level, field-normalised metric, and present the first results of correlations, distributions and application to research university benchmarking for both metrics. Our analyses demonstrate that FWCI and RCR of articles correlate with varying strengths across different areas of research. Additionally, we observe that both metrics are comparably stable across different subject areas of research. Moreover, at the level of universities, both metrics correlate strongly.     

古典诗歌英译中的格律问题

诗歌翻译的本质就是再现原诗的审美特质和艺术魅力。围绕这一基本原则 ,在对中国古典诗歌主要格律手段进行分析的基础上 ,着重就中国古典诗歌英译中格律转换之相关技巧进行了探讨与归纳     

The use of the intensity gradient and average acceleration metrics to explore associations with BMI z-score in children

ABSTRACT

This study used the intensity gradient (IG) and average acceleration metrics to describe children’s activity profiles and explore associations with body mass index (BMI) z-score. Two hundred and forty-six children (n = 138 girls) aged 9.6 ± 1.4 years wore a wrist-mounted ActiGraph wGT3X-BT accelerometer for 7 days on their non-dominant wrist. Physical activity (PA) metrics captured included: the IG which describes the intensity distribution of accelerations across the 24 h monitoring period; average acceleration which provides a measure of the volume of activity; total moderate-to-vigorous PA (MVPA) and inactive time. Acceleration was averaged over 5s epochs. Finally, BMI z-score was calculated for each participant. Average acceleration was negatively associated with BMI z-score (p < 0.05) independent of age and gender but not IG. The IG was negatively associated with BMI z-score independent of potential correlates and average acceleration. Total MVPA was not associated with BMI-z score. The IG and average acceleration metrics may be used to explore the independent or cumulative effects of the volume and intensity distribution of activity upon measures of health and well-being in children to inform specific activity recommendations.     

金融行业信息资源优化协同配置标准的系统分析

文章采用模型分析的方法从系统论和协同学的角度透析了金融行业信息资源优化协同配置的影响因素与动力机制,围绕协同配置的目标愿景提出了金融行业信息资源协同配置过程中应当遵循的6大行为准则,透过金融信息资源协同配置主体的信源特征、主体职能、服务对象与服务愿景,逐一分析了我国金融行业信息资源协同配置的主体要素、技术要素和本体要素优化协同配置的衡量标准.     

吴声西曲与永明体成立关系的诗律学考察

永明声病理论源于晋宋乐府,吴声西曲对永明诗律形成具有较大影响,是近来永明体形成研究领域的一种新说。这一新说不仅得不到乐律与诗律对应关系的理论证明,而且也得不到诗律分析数据的支撑。现存晋宋吴声西曲多为五言四句诗,它与永明诗律的相合程度,不仅低于晋宋文人五言诗,更低于其中的五言四句诗。今存晋宋吴声西曲中永明律句、永明律联所占比例,并未超出其在五言诗中的出现概率,说明这些歌辞的作者尚无明确的永明诗律意识。永明体诗律系受晋宋吴声西曲声律之启发而形成的说法,既不符合诗史,也与逻辑相悖。     

电子商务应用成功的衡量标准研究

网络强化组织正面临开发与使用有效的衡量标准以评价电子商务活动成功的压力.针对电子商务应用成功衡量标准的设计问题,发现了新衡量标准的五个基本特征,设计了全面而合理的电子商务应用成功衡量标准的三个关键维度,并识别了这些关键衡量标准之间的逻辑关系.对BS公司的案例分析验证了这三个维度衡量标准的有效性.     

A comparison of extrinsic clustering evaluation metrics based on formal constraints

There is a wide set of evaluation metrics available to compare the quality of text clustering algorithms. In this article, we define a few intuitive formal constraints on such metrics which shed light on which aspects of the quality of a clustering are captured by different metric families. These formal constraints are validated in an experiment involving human assessments, and compared with other constraints proposed in the literature. Our analysis of a wide range of metrics shows that only BCubed satisfies all formal constraints. We also extend the analysis to the problem of overlapping clustering, where items can simultaneously belong to more than one cluster. As Bcubed cannot be directly applied to this task, we propose a modified version of Bcubed that avoids the problems found with other metrics.

Web2.0环境下的科学计量学:选择性计量学

介绍一种Web 2.0环境下的科学计量学理论——选择性计量学。指出选择性计量学与网络计量学既有联系又有区别,选择性计量学与传统科学质量评价的研究对象有所不同。综合分析选择性计量学在时效性、覆盖面和科学交流过程方面的独特研究意义。总结可以在多种开放存取平台和学术社交网络中提取的选择性计量学的评价指标。以Total-Impact工具为例,分析选择性数据集来源和选择性计量类型。