1,726,971 research outputs found
The Assessment of Straightness and Flatness Errors Using Particle Swarm Optimization
No full textThe straightness and flatness errors are generally assessed by using the Least Squares Method (LSM). However, the results obtained from LSM often overestimate the tolerances, and are not consistent with the ISO standards’ definitions. To this end, this paper presents a method to evaluate those errors by using particle swarm optimization (PSO). The realization technique is detailed. The experimental data is utilized to verify this algorithm, together with a comparison with some typical optimization algorithms
Wei he dui fu hong wei bing: Li Jingquan bao gao : jiang hua
No full text珠江水利造反兵团.文字: 为何对付红卫兵 李井泉报告 讲话 李井泉;下款: 珠江水利造反兵团批判李井泉漫画 一九六七年四月.裝裱後高寬: 117 x 49 cm.Zhujiang shui li zao fan bing tuan.Wen zi : Wei he dui fu hong wei bing Li Jingquan bao gao jiang hua Li Jingquan; Xia kuan : Zhujiang shui li zao fan bing tuan pi pan Li Jingquan man hua 1967 nian 4 yue.Zhuang biao hou gao kuan : 117 x 49 cm
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
sj-pdf-1-jba-10.1177_08853282221102673 – Supplemental Material for Albumin-templated manganese carbonate nanoparticles for precise magnetic resonance imaging of acute myocardial infarction
No full textSupplemental Material, sj-pdf-1-jba-10.1177_08853282221102673 for Albumin-templated manganese carbonate nanoparticles for precise magnetic resonance imaging of acute myocardial infarction by Bing Li, Luyi Han, Hao Wang and Yuanyuan Zheng in Journal of Biomaterials Applications</p
sj-docx-1-ltr-10.1177_13621688221122611 – Supplemental material for Clustering perceived learning environment as antecedents of willingness to communicate in a second language
No full textSupplemental material, sj-docx-1-ltr-10.1177_13621688221122611 for Clustering perceived learning environment as antecedents of willingness to communicate in a second language by Zheng Li, Bing Li, Xinglong Wang and Ling Zhen in Language Teaching Research</p
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Nitrogen-doped activated graphene/SWCNT hybrid for oxygen reduction reaction
No full textPt-free catalyst towards oxygen reduction reaction (ORR) that is highly active, stable, and low-cost is highly desirable for commercialization of fuel cells but still remains unresolved. Here, we report a hybrid material of nitrogen-doped activated graphene/carbon nanotubes via a simple self-assembly of graphene and carbon nanotubes followed by KOH activation and high temperature annealing in NH3 for an efficient metal-free catalyst for ORR. The single-walled carbon nanotubes are well intercalated into nanoporous graphene layers, which lead to a high surface area and electrical conductivity of the hybrid. The nitrogen doping provides more reactive sites for ORR and significantly enhances the reaction properties. The hybrid structure exhibits excellent catalytic behavior with a four-electron pathway in alkaline media and better stability than the commercial Pt/C catalyst. This study opens a new direction for developing low-cost and highly efficient carbon-based ORR electrocatalysts. © 2016 Elsevier B.V3311sciescopuskc
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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