161 research outputs found
Cu cao biao mian de re tuan liu dui liu de Nusselt shu he Leinuo shu de ce liang
No full textChan, Tak Shing = 粗糙表面的熱湍流對流的Nusselt數和雷諾數的測量 / 陳德城.Thesis (M.Phil.)--Chinese University of Hong Kong, 2008.Includes bibliographical references (p. 63-67).Abstracts in English and Chinese.Chan, Tak Shing = Cu cao biao mian de re tuan liu dui liu de Nusselt shu he Leinuo shu de ce liang / Chen Decheng.Table of Contents --- p.vList of Figures --- p.xiList of Tables --- p.xiiChapter 1 --- Introduction --- p.1Chapter 1.1 --- What is turbulence ? --- p.1Chapter 1.2 --- Rayleigh Benard convection system --- p.3Chapter 1.2.1 --- Oberbeck-Boussinesq approximation and equations of Rayleigh- Benard system --- p.5Chapter 1.2.2 --- Some coherent structures of Rayleigh-Benard convection system --- p.7Chapter 1.3 --- Motivation --- p.8Chapter 2 --- Experimental methods and setups --- p.12Chapter 2.1 --- Convection cell --- p.12Chapter 2.2 --- Temperature measurement --- p.15Chapter 2.3 --- Experimental techniques --- p.16Chapter 2.3.1 --- Heat leakage prevention --- p.16Chapter 2.3.2 --- Water absorption of Dipropylene Glycol --- p.21Chapter 2.3.3 --- Particle Image Velocimetry --- p.22Chapter 3 --- Heat flux measurement --- p.25Chapter 3.1 --- Water Results --- p.26Chapter 3.1.1 --- Experimental procedures --- p.26Chapter 3.1.2 --- Heat leakage/ heat absorption estimation --- p.27Chapter 3.1.3 --- Results and discussions --- p.29Chapter 3.2 --- Dipropylene Glycol Results --- p.32Chapter 3.2.1 --- Experimental procedures --- p.32Chapter 3.2.2 --- Heat leakage/ heat absorption estimation --- p.33Chapter 3.2.3 --- Result and discussions --- p.34Chapter 3.3 --- More discussion --- p.41Chapter 4 --- Large scale circulation and Reynolds number measurement --- p.44Chapter 4.1 --- Flow pattern of turbulent Rayleigh-Benard convection over rough plates --- p.46Chapter 4.2 --- Reynolds number measurement --- p.48Chapter 4.2.1 --- Reynolds number determined from oscillation of temper- ature signals --- p.48Chapter 4.2.2 --- Reynolds number determined from velocity measurement near sidewall --- p.55Chapter 5 --- Conclusion --- p.61Chapter 5.1 --- Conclusion --- p.61Bibliography --- p.6
Nondestructive 14 MeV Neutron activation : analysis of jades.
No full textby Chan Tak Shing.Bibliography: leaves 81-83Thesis (M.Phil.)--Chinese University of Hong Kong, 198
Room air conditioner preference and country of origin in Hong Kong and Zhu Hai.
No full textby Chow Kar Tak, Kelly, Chan Wai Shing, Cheung Wai Hung, Daniel.Includes questionnaire in Chinese.Thesis (M.B.A.)--Chinese University of Hong Kong, 1995.Includes bibliographical references (leaves [33]-[35]).Chapter 1. --- Introduction --- p.1Chapter 2. --- The Room Air Conditioners Market in Hong Kong and Zhu Hai --- p.3Chapter 3. --- Sample Characteristics --- p.4Chapter 4. --- Choice Criteria of Room Air Conditioning Units --- p.7Chapter 4.1 --- Country of Brand --- p.12Chapter 4.2 --- Country of Production --- p.15Chapter 4.3 --- Price --- p.20Chapter 4.4 --- Quietness --- p.22Chapter 4.5 --- Reliability --- p.23Chapter 4.6 --- Additional Features --- p.24Chapter 4.7 --- Size --- p.25Chapter 5. --- Conclusion --- p.26Appendix A -List of TablesAppendix B -ReferenceAppendix C - Survey Questionnaire for Hong KongAppendix D - Survey Questionnaire for Zhu Ha
Erratum: Reactivation of Epstein–Barr virus by a dual-responsive fluorescent EBNA1-targeting agent with Zn2+-chelating function (Proceedings of the National Academy of Sciences of the United States of America (2019) 116 (26614-26624) DOI: 10.1073/pnas.1915372116)
No full textCorrection for “Reactivation of Epstein–Barr virus by a dualresponsive fluorescent EBNA1-targeting agent with Zn2+- chelating function,” by Lijun Jiang, Hong Lok Lung, Tao Huang, Rongfeng Lan, Shuai Zha, Lai Sheung Chan, Waygen Thor, Tik-Hung Tsoi, Ho-Fai Chau, Cecilia Boreström, Steven L. Cobb, Sai Wah Tsao, Zhao-Xiang Bian, Ga-Lai Law, Wing-Tak Wong, William Chi-Shing Tai, Wai Yin Chau, Yujun Du, Lucas Hao Xi Tang, Alan Kwok Shing Chiang, Jaap M. Middeldorp, Kwok-Wai Lo, Nai Ki Mak, Nicholas J. Long, and Ka-Leung Wong, which was first published December 10, 2019; 10.1073/pnas.1915372116 (Proc. Natl. Acad. Sci. U.S.A. 116, 26614–26624). The authors note that Fig. 6 appeared incorrectly. Part of panel D of the published figure was inadvertently omitted. The corrected figure and its legend appear below. (Figure Presented)
Identifying Metering Hierarchies with Distance Correlation and Dominance Constraints
No full textIn this paper, we consider observations from a series of smart meters that are either completely or partially aggregated, and our aim is to estimate the metering hierarchy. We propose to estimate this important metadata through a novel adaptation of the Chow–Liu tree learning procedure. Our approach takes into account prior knowledge from a set of dominance conditions that are easily elicited from the consumption data. In addition to more traditional correlation-based approaches we also introduce a distance-correlation-based method for detecting edges. Synthetic experiments show the benefits of distance correlation and the dominance conditions in recovering tree structure. The paper concludes with a real-world application of the method to infer energy metering hierarchies in a library building
香港之夜
No full textpoems by Fan Sin Piu 樊善標, Chan Chi Tak 陳滅, Cheng Ching Hang 鄭政恆, Ng Mei Kwan 吳美筠, Lau Wai Shing 劉偉成, Liu Waitong 廖偉棠, Chris Song 宋子江, Chow Hon Fai 周漢輝, Jacky Yuen 阮文略, Zeit Fong方太
The Evaluation of Physical Stillness with Wearable Chest and Arm Accelerometer during Chan Ding Practice
No full text[[abstract]]Chan Ding training is beneficial to health and emotional wellbeing. More and more people have taken up this practice over the past few years. A major training method of Chan Ding is to focus on the ten Mailuns, i.e., energy points, and to maintain physical stillness. In this article, wireless wearable accelerometers were used to detect physical stillness, and the created physical stillness index (PSI) was also shown. Ninety college students participated in this study. Primarily, accelerometers used on the arms and chest were examined. The results showed that the PSI values on the arms were higher than that of the chest, when participants moved their bodies in three different ways, left-right, anterior-posterior, and hand, movements with natural breathing. Then, they were divided into three groups to practice Chan Ding for approximately thirty minutes. Participants without any Chan Ding experience were in Group I. Participants with one year of Chan Ding experience were in Group II, and participants with over three year of experience were in Group III. The Chinese Happiness Inventory (CHI) was also conducted. Results showed that the PSI of the three groups measured during 20–30 min were 0.123 ± 0.155, 0.012 ± 0.013, and 0.001 ± 0.0003, respectively (p < 0.001 ***). The averaged CHI scores of the three groups were 10.13, 17.17, and 25.53, respectively (p < 0.001 ***). Correlation coefficients between PSI and CHI of the three groups were −0.440, −0.369, and −0.537, respectively (p < 0.01 **). PSI value and the wearable accelerometer that are presently available on the market could be used to evaluate the quality of the physical stillness of the participants during Chan Ding practice
Dynamical wetting transitions : liquid film deposition and air entrainment
No full textThe speed at which a liquid can move over a substrate is strongly limited when the surface is partially dry. The wetting dynamics is then governed by the motion of the contact line, which has remained a challenging problem in fluid mechanics. Such moving contact lines play a key role for printing and imaging techniques. The technology of Immersion Lithography, for example, uses a portion of water between a lens and a substrate in order to increase the resolution. When the substrate is moving too fast, droplets are emitted at the receding part of the water. Similarly, air bubbles can be observed in the advancing part, suggesting entrainment of air at the advancing contact line. The transition from a steady interface to drop emission or air entrainment is called a dynamical wetting transition, and originates from the maximum speed at which contact lines can move across a surface. This thesis therefore addresses the fundamentals of “dynamical wetting transitions”
A Cognitive Information Theory of Music: A Computational Memetics Approach
No full textThis thesis offers an account of music cognition based on information theory and memetics. My research strategy is to split the memetic modelling into four layers: Data, Information, Psychology and Application. Multiple cognitive models are proposed for the Information and Psychology layers, and the MDL best-fit models with published human data are selected. Then, for the Psychology layer only, new experiments are conducted to validate the best-fit models.
In the information chapter, an information-theoretic model of musical memory is proposed, along with two competing models. The proposed model exhibited a better fit with human data than the competing models. Higher-level psychological theories are then built on top of this information layer. In the similarity chapter, I proposed three competing models of musical similarity, and conducted a new experiment to validate the best-fit model. In the fitness chapter, I again proposed three competing models of musical fitness, and conducted a new experiment to validate the best-fit model. In both cases, the correlations with human data are statistically significant.
All in all, my research has shown that the memetic strategy is sound, and the modelling results are encouraging. Implications of this research are discussed
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