31,774 research outputs found
Yu Zhong yang wen ge xiao zu bian lun
No full text東風造反团 批邓小平漫画組.文字: 与中央文革小組辯论;下款: 東風造反团 批邓小平漫画組 一九六七年六月一日.裝裱後高寬: 121 x 38 cm.Title devised by cataloguer.Dong feng zao fan tuan pi deng xiao ping man hua zu.Wen zi : Yu Zhong yang wen ge xiao zu bian lun; Xia kuan : Dong feng zao fan tuan pi Deng Xiaoping man hua zu 1967 nian 6 yue 1 ri.Zhuang biao hou gao kuan : 121 x 38 cm
Using performance assessment in secondary school mathematics: an empirical study in a Singapore classroom
No full textThis article reports an exploratory study on using performance assessment in mathematics instruction in a high-performing secondary school in Singapore. An intact mathematics class participated in the study, and received chapter-based performance tasks as intervention during regular mathematics lessons for about one and a half school years. The performance tasks used included authentic and/or open-ended tasks. The students’ academic achievements and attitudes in mathematics were compared with a comparison class that did not receive the intervention. Both quantitative and qualitative data were collected, mainly through questionnaire surveys, performance task tests, conventional school exams, and interviews with students and teachers. The results suggest that the students receiving the intervention performed significantly better than their counterparts in solving conventional exam problems, and in general they also showed more positive changes in attitudes towards mathematics and mathematics learning. The students from the experimental class also expressed positive views about the benefits of using performance tasks in promoting their ability in higher order thinking, though no statistically significant difference was detected between the two classes of students in solving unconventional tasks before and after intervention. Overall, the results appear to support teachers’ using contextualised problems in real life situations and open-ended investigations in students’ learning of mathematic
Fan leaders’ control on Xiao Zhan's Chinese fan community
No full textFans of Chinese media celebrity Xiao Zhan provide a case study of the existence of a highly centralized, well-trained fan community in Chinese media fandom, in which a majority of the fans are controlled and exploited by a faction of fan leaders. Fans have strong, exclusive feelings regarding their idol. Fan leaders make use of these feelings in order to organize the fans to routinize a wide range of data-manuipulation activities to ensure the success of their idols, and in so doing, these fans' actions exhibit conformity rather than autonomy. By controlling the dissemination of information within the community, fan leaders cultivate individual fans to ensure that they engage in a series of activities that support their idols
Air and Water Flowrate Optimisation for a Fan Coil Unit in Heat Pump Systems
No full textThe degradation in efficiency of auxiliary components in heating/cooling systems when operating at part load is frequently reported. Through the use of variable speed components, the supplied capacity can be reduced to match the required load and hence reduce unnecessary energy consumption. However, for fan coil units, difficulties can arise when optimizing fan and pump speeds at part load. Practically locating optimal water and air flow rates from readily available information and for varying supplied capacities is necessary, in order to reduce the fan coil power consumption. This research attempts to identify whether optimal fan and pump speeds exist for a fan coil unit and how they can be implemented, in a practical manner, in a system control applications. Using an empirical fan coil and pump model, the total power consumption (fan and pump) for different combinations of fan and pump speeds over a range of capacities was calculated. It was observed that, for a given capacity, an optimal combination of fan and pump speeds exists and there was a significant change in power consumption for different combinations of fan and pump speeds supplying the same capacity. A control strategy is described that utilizes a simple fan coil capacity estimation model, coupled with air and water flow rates, along with nominal design data. The pump speed is optimized using PID control to maintain the space temperature at the chosen set-point, which matches the supplied capacity to the required capacity. At set-time intervals, the capacity estimation model is utilized to optimize the water and air flow rates for the required capacity. The control strategy is evaluated, using a full building simulation model for a daily load profile and is compared to two baseline conditions: for no control of the fancoils/pump combination and for PID circulation control of the pump only. The optimal fan and pump speed control resulted in a 43% and 24% decrease in power consumption with compared to the no control baseline and the PID controlled circulation pump strategy, respectively
Richardson, Barbauld, and the construction of an early modern fan club
No full textMPhilMuch has been written about the life and long works of the eighteenth century epistolary novelist, Samuel Richardson, but the prospect of his position as the first celebrity novelist – responsible for courting his own fame as well as initiating his own fan club – has largely been ignored. The body of manuscripts housed at the National Art Library in the Victoria and Albert Museum in London provides the modern scholar with evidence of the skeletal beginnings of an early fan club. This thesis aims to show how these manuscripts were turned into a saleable commodity by the publisher and entrepreneur Richard Phillips, while under the guiding hand of another, slightly later, literary celebrity, Anna Laetitia Barbauld. In order to restore Richardson’s reputation amongst a new nineteenth century audience, Barbauld was required to construct her own idea of him as an eighteenth century celebrity author, and in doing so the insecurities of a self-professed, apparently diffident man, are revealed. Barbauld’s capacious, but heavily edited selection of letters is analyzed in this thesis, providing ample evidence that Richardson’s correspondents were more than just eager letter writers. By using Barbauld’s biography of Richardson this thesis aims to show how she manipulates the genre of life writing in her construction of him.
This thesis offers an alternative reading of how the Richardson manuscripts are viewed, redefining them as not simply a collection of letters, but as a collective entity, deliberately selected and archived as evidence of an early modern fan club, and its celebrity managing director
Replication Data for: Surface-Tension Induced High Packing Density Carbon Nanoribbons Film with Ultrahigh Volumetric Capacitance
No full textRaw data for all plots in the paper: Xiao Jun Shi, Huanwen Wang*, Taoqiu Zhang, Tong Xue, Haiyong He and Hong Jin Fan*, Surface-Tension Induced High Packing Density Carbon Nanoribbons Film with Ultrahigh Volumetric Capacitance, Energy Environ. Sci., 2025,18, 10413-1042
Fan Wenzheng gong po yang yi shi lu
No full text卷一至二. 奏議 -- 卷三. 狀 -- 子 -- 卷四. 表 -- 卷五. 賦 -- 卷六至七. 詩 -- 詩餘 -- 卷八. 序 -- 記 -- 易義 -- 說 -- 論 -- 贊 -- 頌 -- 述 -- 卷九. 書 -- 啟 -- 卷十. 尺牘 -- 家書 -- 卷十一. 祭文 -- 碑銘 -- 墓誌銘 -- 卷十二. 墓誌銘 -- 墓表 -- 書碑陰 -- 附錄: 范文正公年譜序.Juan yi zhi er. Zou yi -- juan san. Zhuang -- Zi -- juan si. Biao -- juan wu. Fu -- juan liu zhi qi. Shi -- Shi yu -- juan ba. Xu -- Ji -- Yi yi -- Shuo -- Lun -- Zan -- Song -- Shu -- juan jiu. Shu -- Qi -- juan shi. Chi du -- Jia shu -- juan shi yi. Ji wen -- Bei ming -- Mu zhi ming -- juan shi er. Mu zhi ming -- Mu biao -- Shu bei yin -- fu lu: Fan Wenzheng gong nian pu xu.毛一鷺彙編.綫裝, 1函.框21.5x15公分, 9行20字, 小字雙行同. 白口, 四周單邊, 無魚尾. 版心上鐫題名, 中鐫卷次, 下鐫葉次及字數.毛序後鐫"天啟二年[1622]冬華亭縣學門人唐造國謹百拜書"見《香港中文大學圖書館古藉善本書錄》(2001, p. 223)前附: 范文正公鄱陽遺事錄 / 毛一鷺彙編.鈐有"北海狂士合清齋主人之印", "京兆禎夫", "禹山人", "隨齋", "大觀樓藏書", "蕭艾室藏"印.Xian zhuang, 1 han.Kuang 21.5 x 15 gong fen, 9 hang 20 zi, xiao zi shuang hang tong. Bai kou, si zhou dan bian, wu yu wei. Ban xin shang juan ti ming, zhong juan juan ci, xia juan ye ci ji zi shu.Mao xu hou juan "Tian qi er nian [1622] dong Huating Xian xue men ren Tang Zaoguo jin bai bai shu"Jian "Xianggang Zhong wen da xue tu shu guan gu ji shan ben shu lu" (2001, p. 223)Mao Yilu hui bian.Qian fu: Fan Wenzheng gong po yang yi shi lu / Mao Yilu hui bian.Qian you "Beihaikuangshi He qing zhai zhu ren zhi yin", "Jing zhao zhen fu", "Yu shan ren", "Sui zhai", "Da guan lou cang shu", "Xiao Ai shi cang" yin
Further evidence of superluminal active galactic nuclei as γ-ray sources
No full textIn our previous work in Xiao et al. (SCPMA, 2019, 62, 129811), we suggested that six superluminal sources could be γ-ray candidates, and in fact, five of them have been confirmed in the fourth Fermi-LAT source catalog (4FGL). In this work, based on the 4FGL, we report a sample of 229 Fermi detected superluminal sources (FDSs), including 40 new FDSs and 62 non-FDSs. Thus, we believe that all superluminal sources should have γ-ray emissions, and superluminal motion could also be a clue to detect γ-ray emission from active galactic nuclei. We present a new approach of Doppler factor estimate through the study of the γ-ray luminosity (Lγ) and of the viewing angle (φ)
Development of a rotor model for the numerical simulation of helicopter exterior flow-fields
No full textIncludes bibliographical references (leaves 84-85).A numerical methodology is developed to model the effect of a rotor on the surrounding flow-field. The model calculates the time-averaged aerodynamic forces exerted on the air by the fan blades within the blade-swept region, and permits the user to specify blade properties such as cross-sectional profile and orientation at a particular radial and azimuthal location. The calculated forces are included as source terms within the Reynolds-averaged Navier-Stokes equations for an incompressible fluid, which are solved by the commercial CFD solver, FLUENT. The effects of turbulence are incorporated through the use of Launder and Spalding's k-g turbulence model. This method is selected as being the most efficient use of the resources available, giving the economic advantages of a steady simulation, while allowing radial and azimuthal variations of rotor characteristics. In order to validate the accuracy of the numerical model for both aligned and non-aligned inflow conditions, results are compared with experimental data reported for an axial flow fan. Agreement between experimental and numerical results is excellent to good. Fan static pressure rise is closely predicted by the numerical solution, while fan power consumption and fan static efficiency are under and over-predicted respectively. This error may be attributed to frictional losses not accounted for in the numerical model. These include physical rotational instabilities, leading to increased mechanical losses, and tip effects due to the clearance between the fan blade tips and the fan casing. Trends are nevertheless consistently predicted by the numerical model for inflow angles up to 45°, and for the range of blade pitch settings used. The adverse effect of off-axis inflow on the fan static pressure rise is numerically predicted, while fan power consumption is found to remain independent of inflow angle, as had been experimentally observed. The rotor model is finally integrated with the fuselage of the CIRSTEL (Combined Infra-Red Suppression and Tail rotor Elimination) prototype in an analysis of the helicopter exterior flow-field. No experimental data for this configuration was available for validation purposes. However, the model is used in the simulation of several common helicopter flight conditions. Results are presented graphically, and generally indicate good agreement with physically observed phenomena
Agacysma Huang, Horie, Fan, Wang & Espeland, 2023, gen. n.
No full textGenus Agacysma S.-Y. Huang & Horie, gen. n. A. sinica S.-Y. Huang & Horie sp. n.Published as part of Huang, Si-Yao, Horie, Kiyoshi, Fan, Xiao-Ling, Wang, Min & Espeland, Marianne, 2023, A review of the genus Agalope Walker (Lepidoptera, Zygaenidae, Chalcosiinae) with taxonomic notes and descriptions of three new genera and three new species, pp. 291-321 in Zootaxa 5284 (2) on page 319, DOI: 10.11646/zootaxa.5284.2.4, http://zenodo.org/record/792341
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