1,723,122 research outputs found
Pelliot chinois 3026
No full textContient : Tai shang [dong xuan ling bao) ye bao yin yuan jing 太 上 [洞 玄 靈 寶] 業 報 因 緣 經 ; Citations du Da bo nie pan jing 大 般 涅 槃 經, [trad. de Hui yan 慧 嚴 et autres]Numérisation effectuée à partir d'un document original
Efficiency enhancement of distributed power amplifier design for radio frequency communication systems / Huan Hui Yan
Full text linkIn the field of radio frequency (RF) and microwave communication system, there is an endless demand on wideband frequency operation and the amount of research work in the area of Power Amplifiers (PA) has grown as well to solve all kinds of problems. For instance, wireless portable devices have become common used in our daily life, but we often face the problem of its battery drains easily. Hence, a good design of PA can play an important role to satisfy all sorts of stringent needs. This research presents two designs of broadband distributed power amplifiers (DPAs) with different approaches. The first DPA designed using Pseudomorphic (PM) and Gallium Nitride (Xie) based with high-electron-mobility transistor (HEMT) technology as the power devices with the novel integration of broadband impedance transformer at the drain line termination. Besides, it demonstrated significant good performance over the entire bandwidth from 100 MHz to 2.4 GHz with 10 W output power performances and reaches average 35% of efficiency in 30 dB flat gains across bandwidth measured. On the other hand, the second DPA design driven by 3-stage of 10 W GaN HEMT with the gate line adjustment network and drain line tapering implementation for overall efficiency enhancement. Experimental of the prototype demonstrated output power of 41 dBm, flat gain at 12 dB, and bandwidth covering 80 MHz to 2.0 GHz with power added efficiency (PAE) 45% under 28 V drain bias. These concepts were implemented and developed in Advanced Design System (ADS) to obtain simulations and ideal performance. The research contribution has delivered bandwidth-efficiency improvements on the conventional distributed amplifier (DA) topology, battery life extension, and lower cost that is compatible with two-way radios communication applications such as Software Defined Radio (SDR). After all, this study offers practical skills and industrial realization in RF and microwave communications systems
Supplemental Material - Association Between Serum Levels of Nicotinamide-Adenine Dinucleotide Phosphate Oxidase 2 and the Development of Atrial Fibrillation After Isolated Coronary Artery Bypass Grafting: A Prospective Pilot Study
No full textSupplemental Material for Association Between Serum Levels of Nicotinamide-Adenine Dinucleotide Phosphate Oxidase 2 and the Development of Atrial Fibrillation After Isolated Coronary Artery Bypass Grafting: A Prospective Pilot Study by Hui Yan, JiaYing Zhang, Fang Qin Wu, and Gui Fang Du in Biological Research For Nursing</p
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
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
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
sj-docx-3-jet-10.1177_15266028241241494 – Supplemental material for In-stent Restenosis After Stenting for Superior Mesenteric Artery Dissection Is Associated With Stent Landing Zone: From Clinical Prediction to Hemodynamic Mechanisms
No full textSupplemental material, sj-docx-3-jet-10.1177_15266028241241494 for In-stent Restenosis After Stenting for Superior Mesenteric Artery Dissection Is Associated With Stent Landing Zone: From Clinical Prediction to Hemodynamic Mechanisms by Junhao Mei, Hui Yan, Xi Zhao, Yuan Yuan, Haobo Su, Tongqing Xue and Zhongzhi Jia in Journal of Endovascular Therapy</p
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