1,720,983 research outputs found
A new species of Crenoptychoptera Kalugina, 1985 (Diptera: Ptychopteridae) from the Middle-Late Jurassic of Jiyuan Basin, China
No full textLIU, YU-MING, HUANG, DI-YING (2021): A new species of Crenoptychoptera Kalugina, 1985 (Diptera: Ptychopteridae) from the Middle-Late Jurassic of Jiyuan Basin, China. Palaeoentomology 4 (1): 27-29, DOI: 10.11646/palaeoentomology.4.1.5, URL: http://dx.doi.org/10.11646/palaeoentomology.4.1.
New insect fossils discovered from the Lower Jurassic Sangonghe Formation at the Turpan Basin, Xinjiang, NW China
No full textWang, Ye-hao, Nel, André, Fu, Yan-zhe, Su, Yi-tong, Cai, Chen-yang, Liu, Yu-ming, Gao, Jian, Huang, Di-ying (2022): New insect fossils discovered from the Lower Jurassic Sangonghe Formation at the Turpan Basin, Xinjiang, NW China. Palaeoentomology 5 (2): 183-194, DOI: 10.11646/palaeoentomology.5.2.12, URL: http://zoobank.org/d5677074-3d13-4d8a-8b9c-03be43e1da4
FIGURE 2 in New insect fossils discovered from the Lower Jurassic Sangonghe Formation at the Turpan Basin, Xinjiang, NW China
No full textFIGURE 2. Elytra of beetles from the Sangonghe Formation at the Daheyan locality. A–P, NIGPAS180132–NIGP180147. Scale bars = 2 mm in H, 1 mm in A–G, I, J, L, N–P, 0.5 mm in K and M.Published as part of Wang, Ye-hao, Nel, André, Fu, Yan-zhe, Su, Yi-tong, Cai, Chen-yang, Liu, Yu-ming, Gao, Jian & Huang, Di-ying, 2022, New insect fossils discovered from the Lower Jurassic Sangonghe Formation at the Turpan Basin, Xinjiang, NW China, pp. 183-194 in Palaeoentomology 5 (2) on page 185, DOI: 10.11646/palaeoentomology.5.2.12, http://zenodo.org/record/653036
Temperature Control of Proton Exchange Membrane Fuel Cell by Fuzzy Logic
No full text近年來，由於能源短缺，燃料電池已經成為一項不可或缺的替代能源，如何提升電池的效能是一項很重要的課題。燃料電池在操作時， 電池溫度會隨者負載的提高而上升，而溫度的提高將有助於加速電池內部化學反應，使得電池性能上升；然而當溫度過高時，反而會造成電池內部的膜乾化，使化學反應無法繼續進行而讓電池性能掉落。另外，過量的水冷供給亦會使得電池溫度下降，造成電池性能掉落。因此，如何維持適合的電池溫度使電池保持最佳性能是本研究的重點。
本論文利用模糊控制，將質子交換膜燃料電池的溫度控制在最佳溫度；藉由整合燃料電池平台，即時監控各項操作參數，將操作溫度擷取，經由模糊控制運算後，驅動水冷系統控制電池溫度，形成一個閉回路控制系統。實驗結果顯示，經由模糊控制，可將電池溫度控制在一小範圍內，使電池性能即使在負載變動下，輸出仍可保持穩定。Due to the dwindling supply of fossil fuel, the Proton Exchange Membrane Fuel Cell (PEMFC) has become a promising alternative energy source. It is a critical issue to improve the performance of the PEMFC stack. When operating the PEMFC stack, temperature rises as the load current increases. The elevated temperature directly affects the rate of chemical reactions so that the performance of the stack improved. However, the high temperature may result in dehydration of the membrane of PEMFC stack, and degrading its performance. Furthermore, overcooling the stack will reduce the rate of chemical reactions and cause the performance to drop. In this paper, a fuzzy logic control (FLC) is proposed to regulate the temperature in the PEMFC. By establishing a testing platform and monitoring the operating parameters in real time; the stack temperature is acquired for the FLC to manipulate, which directs the water pump to cool the stack. The results demonstrated that the temperature can be controlled within a suitable range, while the voltage response remained stable under load fluctuation
Crenoptychoptera gaoi LIU & HUANG 2021, sp. nov.
No full textCrenoptychoptera gaoi sp. nov. (Fig. 1) Material. Holotype (NIGP174354), a nearly complete right wing. Etymology. The specific epithet is dedicated to Jian Gao, who collected the holotype of the species. 3+4 3+4 Diagnosis. Wing with typical Crenoptychoptera venation. Sc ending proximal to the furcation of R 4+5; darken area occupying half-length of R 1, reaching level of r-m; R 1+2 considerably short, ca. twice length of R 2; R 2 slightly anteriorly curved at its apex; apical part of R 3, R 4 and R 5 posteriorly curved; crossvein m-m nearly perpendicular to M; m-cu and bM of equal lengths. Type locality and horizon. Yangshuzhuang Formation near Anyao Village, Chengliu Township, Jiyuan City, Henan Province, China; earliest Late Jurassic. Description. Wing 14.2 mm long, 2.9 mm wide (as preserved). Pterostigma along distal part of R1 and R2. Base of Rs at 20% of wing length, length of Rs approximately 1.4× length of R 4+5 stem; R 3 about 0.7× length of R 2+3; R 4+5 ramified symmetrically, R 4 parallel with R 5 in whole length, R 4 and R 5 about twice as long as R 4+5. Crossvein r-m connected with Rs, slightly distal to bifurcation of R3 and R 4+5 and located at same level with m–cu. Discal cell long and narrow, about five times as long as wide. M 1+ 2 in straight prolongation of M stem, M1 and M2 thinner and paler than other veins; crossvein m-m slightly curved, joining M 2 close to its base. Anal area partly preserved.Published as part of LIU, YU-MING & HUANG, DI-YING, 2021, A new species of Crenoptychoptera Kalugina, 1985 (Diptera: Ptychopteridae) from the Middle-Late Jurassic of Jiyuan Basin, China, pp. 27-29 in Palaeoentomology 4 (1) on page 28, DOI: 10.11646/palaeoentomology.4.1.5, http://zenodo.org/record/550769
FIGURE 3 in New insect fossils discovered from the Lower Jurassic Sangonghe Formation at the Turpan Basin, Xinjiang, NW China
No full textFIGURE 3. Insect wing fragments from the Sangonghe Formation at Daheyan locality. A, Wing fragment of Odonatoptera, possibly a Protozygoptera of Permagrionidae type, NIGP180148. B, Probably a fragment of auchenorrhynchan hind wing, NIGP180149. C and D, A cockroach forewing without claval part, NIGP180150a, b. Scale = 5 mm in A, 2 mm in B–D.Published as part of Wang, Ye-hao, Nel, André, Fu, Yan-zhe, Su, Yi-tong, Cai, Chen-yang, Liu, Yu-ming, Gao, Jian & Huang, Di-ying, 2022, New insect fossils discovered from the Lower Jurassic Sangonghe Formation at the Turpan Basin, Xinjiang, NW China, pp. 183-194 in Palaeoentomology 5 (2) on page 186, DOI: 10.11646/palaeoentomology.5.2.12, http://zenodo.org/record/653036
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
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