1,720,952 research outputs found
AlGaN/GaN HEMT micro-sensor technology for gas sensing applications
No full text Wide bandgap gallium nitride material has highly favorable electronic properties for next generation power and high frequency electronic devices. A less widely studied application is highly miniaturized chemical and gas sensors capable of operating in harsh environment conditions. In this work we present our recent developments on design, fabrication and testing of AlGaN/GaN high electron mobility transistor (HEMT) based sensors for detection of various gases. First, the method of as-fabricated device baseline value stabilization is demonstrated. Secondly, the impact of sensor design is discussed with the emphasis on gate electrode geometry optimizations to enhance sensing performance. Then we present the sensing characteristics of Pt-HEMTs towards H 2 S and compare them to H 2 and NO 2 . Finally we demonstrate recent results of NO 2 detection with Ti/Au based HEMT sensors, which are superior to those using Pt based devices. Accepted author manuscriptElectronic Components, Technology and Material
Ji yu ju ben e bao fu de jin na mi jie gou de biao mian deng li zi ti ji yuan kai guan yu chuan gan qi
No full textJiang, Nina = 基于聚苯胺包覆的金纳米结构的表面等離子體激元开关与传感器 / 蔣妮娜.Thesis Ph.D. Chinese University of Hong Kong 2014.Includes bibliographical references.Abstracts also in Chinese.Title from PDF title page (viewed on 27, September, 2016).Jiang, Nina = Ji yu ju ben e bao fu de jin na mi jie gou de biao mian deng li zi ti ji yuan kai guan yu chuan gan qi / Jiang Nina
Vortex Dynamics in The Transitional and Turbulent Wake of 6:1 Prolate Spheroid at 45-deg incidence angle
No full textThe incompressible flow past a 6:1 prolate spheroid with an inclination angle of 45o at Re = 3,000 has been studied by means of direct numerical simulations (DNS). The Reynolds number is based on the inflow velocity and minor-axis length. The preliminary results presented here are focused mainly on vortex dynamics and vortical structures in the wake. The wake behind this configuration starts almost symmetric but is soon strongly deflected and bent as it evolves to the intermediate wake. A pair of unequal-strength vortices dominates the intermediate wake, of which one exhibits the shape of a long vortex tube while the other rapidly breaks down into turbulent-like vortical structures
Dang dai Zhongguo jiao yu kuo zhang zhong de gao deng jiao yu ji hui bu ping deng
No full textJiang, Jin.Thesis Ph.D. Chinese University of Hong Kong 2015.Includes bibliographical references (leaves 127-138).Abstracts also in Chinese; appendix A includes Chinese.Title from PDF title page (viewed on 09, November, 2016).Jiang, Jin
Nan Song Shuzhou gong du yi jian zheng li yu yan jiu Zheng li yu yan jiu
No full textBen shu shi dui wo she yu 1990 nian chu ban de ying yin ben "Song ren yi jian" de zheng li yu yan jiu. Gai shu shi liao feng fu, she ji zheng zhi, jing ji, jun shi yi ji Song dai gong wen ge shi he shu yi, shi zhen gui de shi wu wen xian. "Song ren yi jian" fan ying le bu shao nan Song shi qi di fang guan fu ji gou she zhi he xing zheng guan li zhi du, bu chong le xu duo Song dai cai zheng, shui shou zheng ce de xin cai liao, bao liu le nan Song chu nian Jiang Huai di qu zhan bei zhuang kuang de xi jie cai liao, hai shi Song dai wen shu zhi du de zhong yao cai liao, you zhu yu Song shi yan jiu de shen ru. Zheng li ben yan jin gui fan, ge shi ming xi, ji ben huan yuan le Song jian tu ban de ben lai mian mao, ju you jiao qiang de can kao jia zh
Modelica-Supported Attack Impact Evaluation in Cyber Physical Energy System
No full textThe evolved smart grid has become a cyber physical energy system that could be exposed to a massive amount of cyber threats. Vulnerabilities within the cyber part can be used to launch multiple types of attacks that corrupt the physical system. The complexity of cyber physical energy system, the existing of different kinds of attacks, require an appropriate tool to aid in modeling and simulation for cyber security analysis. In this paper, we introduce a modeling language - Modelica to the security community of cyber physical system. We show the capability of Modelica in modeling complex systems and attacks by building up a power grid model with frequency control loop (i.e., automatic generation control), as well as data integrity attack and data availability attack models. The simulation results show how different types of attacks or even combined attacks can affect the system frequency stability.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Intelligent Electrical Power Grid
Hexarhopalus (Hexarhopalus) liuyixiaoi Jiang, Bai, Ren & Wang 2020, sp. nov.
No full textHexarhopalus (Hexarhopalus) liuyixiaoi Jiang, Bai, Ren & Wang sp. nov. (Figs 1–2, 21B, 22 A–D) Type material (52 spec., 35 ♂♂, 17 ♀♀ ). Holotype: CHINA: ♂, labeled ‘ China: Hunan, Yueyang City, Pingjiang County (Ṭűss), Fushoushan (ŠƦƜẁdǔǡ), 28°28’N, 113°46’ E, 1079 m, 20.IX.2016, Jiang, Liu & Zhou leg.’ (MHBU). Paratypes: CHINA: 34 ♂♂, 17 ♀♀. 14 ♂♂, 7 ♀♀, same label data as the holotype (1 ♂, 1 ♀ MYNU; 2 ♂♂, 2 ♀♀ QUST; 5 ♂♂, 2 ♀♀ SHNU; 6 ♂♂, 2 ♀♀ MHBU). 20 ♂♂, 10 ♀♀, labeled ‘ China, Hubei, Xianning City (ŘŤḿ), Tongshan Hsien (áƜss), Jiugong Shan (ŁŽƜ), 29°23’32”N, 114°39’07”E, 1530 m, 30.VII-02.VIII.2016, Hu & Liu leg.’ (10 ♂♂, 5 ♀♀ SHNU; 8 ♂♂, 3 ♀♀ MHBU; 2 ♂♂, 2 ♀♀ LPCB). Description. Male (Figs 1A, 2 A–G). Body more slender than female, long oval, convex, black dull-shiny. Head (Fig. 2A) transverse. Vertex finely covered with small punctures and short hairs. Genae and clypeus covered with denser punctures and hairs. Labrum narrower than clypeus, covered with bristles of medium length in apical portion. Antennal tubercles slightly prominent, antenna (Fig. 2B) nearly as long as head and pronotum combined, club loosely formed by apical four antennomeres. Antennomere I slightly expanded; II shortest, about as long as wide; III longest, more than three times as II, IV-VII similar, shorter than II, apical four dark brown, longer than wide, XI with rounded apex. Pronotum (Fig. 2A) slightly wider than long, widest near middle, dorsal surface finely covered with small punctures and short hairs. Margins of pronotum with deep groove around, groove W-shaped on anterior part. Middle suture shallow, broadened at base, with pair of obvious depressions in middle area on both sides of the median line. Elytra ovoid, nearly twice as long as wide, shoulders strongly narrowed, widest at apical 1/3, disc with regular rows of strongly foveolate punctures, scutellum transverse, near triangular. Hind wings completely reduced. Femora obviously claviform at middle, all tibiae covered with brown setae at apex, protibiae and mesotibiae slightly curved, metatibiae straight. Aedeagus (Figs 2 C–E) nearly symmetrical. Abdominal ventrite VIII (Fig. 2F) deeply split medially at posterior margin and with long dense hairs. Spiculum gastrale (Fig. 2G) dissymmetrical, short, with large apical lobes. Measurements. AnL 6.28–6.58 mm, BL 15.94–16.24 mm, HL 2.51–2.55 mm, HW 2.92–3.19 mm, PL 3.98–4.19 mm, PW 4.05–4.30 mm, EL 9.45–10.50 mm, EW 5.23–6.25 mm, AL 2.17 mm. Female (Fig. 1B), similar to males, but usually larger. Ventrite VIII (Fig. 2H) slightly split medially at posterior margin and covered with long dense hair. Spiculum (Fig. 2H) tortuous at middle, apex rounded and slightly dilated. Apex of ovipositor (Fig. 2I) with one long hair and two much shorter hairs. Measurements. AnL 6.24–6.64 mm, BL 15.96–19.47 mm, HL 2.50–3.00 mm, HW 2.86–3.42 mm, PL 3.82–4.69 mm, PW 3.92–4.72 mm, EL 9.64–11.78 mm, EW 5.73–6.72 mm. Comparative Notes. The new species can be easily differentiated from its congeners by the distinctive groove on the pronotum uninterrupted and W-shaped on the anterior part. Distribution. China: Hunan, Hubei. Biology. The adults of this new species can be collected on tree trunks at night (Figs 22 A–D). Etymology. This species is named in honor of the first author’s colleague Mr. Yi-Xiao Liu, who collected the new species and worked with the first author together for three years.Published as part of Jiang, Ri-Xin, Bai, Xing-Long, Ren, Guo-Dong, Yang, Hui-Yu & Wang, Shuo, 2020, A taxonomic revision of the genus Hexarhopalus (Coleoptera, Tenebrionidae Cnodalonini) from China, pp. 277-304 in Zootaxa 4821 (2) on pages 278-281, DOI: 10.11646/zootaxa.4821.2.3, http://zenodo.org/record/444091
Machine Learning to Predict the 1-Year Mortality Rate After Acute Anterior Myocardial Infarction in Chinese Patients [Corrigendum]
No full textYi-ming Li, 1,* Li-cheng Jiang, 1, 2,* Jing-jing He, 1 Kai-yu Jia, 1 Yong Peng, 1 Mao Chen 1 1Department of Cardiology, West China Hospital, Sichuan University, Chengdu, People’s Republic of China; 2Department of Cardiology, The First Affiliated Hospital, Chengdu Medical College, Chengdu, People’s Republic of China*These authors contributed equally to this workThe authors have advised that the affiliation for author Li-cheng Jiang was presented incorrectly.
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Innovative denim fabric design by color coating using laser etching and hollowing technologies
No full textAuthor name used in this publication: JIANG Shou-xiangRefereed conference paper2014-2015 > Academic research: refereed > Refereed conference paperVersion of RecordPublishedPublisher permissio
Impact of high temperature H<sub>2</sub> pre-treatment on Pt-AlGaN/GaN HEMT sensor for H<sub>2</sub>S detection
No full textIn this paper, a method to extend the detection range of hydrogen sulfide (H2S) gas sensor is demonstrated. The sensor is based on AlGaN/GaN high electron mobility transistors (HEMTs) with Pt gate. It is observed that the as-fabricated devices exhibited sensing signal saturation at 30 ppm H2S exposure in dry air. A pre-treatment using H2 pulses in dry air ambient at 250 °C was applied to extend the detection range of the sensor. The H2 treated H2S gas sensor was able to detect a higher H2S concentration up to 90 ppm at 250 °C without complete saturation.Accepted author manuscriptElectronic Components, Technology and MaterialsSignal Processing System
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