4,578 research outputs found
A survey of emerging interconnects for on-chip efficient multicast and broadcast in many-cores
No full textNetworks-on-chip (NoC) have emerged to tackle different on-chip communication challenges and can satisfy different demands in terms of performance, cost and reliability. Currently, interconnects based on metal are reaching performance limits given relentless technology scaling. In particular, a performance bottleneck has emerged due to the demands for communication in terms of bandwidth for multicasting and broadcasting. As a result, various state-of-the-art architectures have been proposed as alternatives and emerging interconnects including the use of optics or radio frequency (RF). This article presents a comprehensive survey of these various interconnect fabrics, and discusses their current and future potentials and obstacles as well. This article aims to drive the research community to achieve a better utilization of the merits of on-chip interconnects and addresses the challenges involved. New interconnect technologies, such as optical interconnect, wireless NoC (WiNoC), RF transmission lines (RF-I) and surface wave interconnects (SWI), are discussed, evaluated and compared. Consequently, these emerging interconnects can continue to provide the cost efficiency and performance that are highly demanded for future many-core processors and high performance computing
Implementation of Real Estate Investment Trust (REIT) in Hong Kong
No full textby Cheng Ngai Fai, Tong Wai Kin, Kenneth.Thesis (M.B.A.)--Chinese University of Hong Kong, 1997.Includes bibliographical references (leaf 50).Chapter 1. --- INTRODUCTION --- p.1Chapter 2. --- OBJECTIVES --- p.4Chapter 3. --- LITERATURE REVIEW --- p.6Overview of REITs --- p.6The Current Market of REIT --- p.8Regulations Imposed on REITs --- p.10Performance of the REITs --- p.12Key Success Factors and Marketability of REITs --- p.14Avoid Double Taxation --- p.14Current Income --- p.15High Liquidity --- p.15Professional Management --- p.16Portfolio Diversification --- p.16Performance Monitoring --- p.17Inflationary Hedge --- p.18Attraction of REITs to Pension Investors --- p.19REIT Dependence on Capital Markets --- p.20Who Will Supply the Capital --- p.21Four Basic Investment Methods --- p.23Real Estate Analysis --- p.24Chapter 4. --- HONG KONG ECONOMIC AND FINANCIAL ENVIRONMENT --- p.25General Economy --- p.25Hong Kong Stock Market --- p.28Hong Kong Debt Market --- p.30Hong Kong Property Market --- p.32Chapter 5. --- ANALYSIS --- p.35Hong Kong Stock Market --- p.35Simulation of REIT in Hong Kong --- p.39Chapter 6. --- DISCUSSION --- p.43Internal Rate of Returns --- p.43Risks and Returns --- p.44Limitations on Our Studies --- p.45Conclusions --- p.45APPENDIX --- p.47BIBLIOGRAPHY --- p.5
Yi fen zi dong li mo ni yan jiu cha er tong yi gou mei de xuan ze xing
No full textTung, Chun Fai = 以分子動力模擬研究查耳酮異構酶的選擇性 / 董俊暉.Thesis M.Phil. Chinese University of Hong Kong 2015.Includes bibliographical references (leaves 57-59).Abstracts also in Chinese.Title from PDF title page (viewed on 29, September, 2016).Tung, Chun Fai = Yi fen zi dong li mo ni yan jiu cha er tong yi gou mei de xuan ze xing / Dong Junhui
A finite pressure element approach to the planing problem of high speed craft
No full textA finite element method is presented for the steady motion of a craft planing over the surface of calm water. The fluid is assumed to be infinitely deep, inviscid, incompressible and without surface tension and the free surface is assumed to be of infinite extent. In addition, the angle of attack is assumed to be small and linearized potential flow theory is used. The method applies to the case of arbitrary Froude number and aspect ratio. The presence of the craft is modelled by an unknown pressure distribution on its wetted bottom projected on the plane of the undisturbed free surface. This is represented by a finite element mesh consisting of a number of pressure elements, each of constant but different strength. The shape of the element can be arbitrary and therefore the theory can be applied to wetted planforms of any shape or configuration. The shape and extent of the wetted bottom is assumed to be known and the immersions along the transom are determined together with the pressures by satisfying the kinematic hull boundary condition at the centre of each element and the Kutta condition at a discrete number of points along the transom. The finite element method has been applied to planing flat plate and prismatic hulls of constant deadrise angle. The derived lifts centre of pressure locations and pressures have compared reasonably well with other experimental and theoretical results. An interpolating scheme for determining the operating trim angle and wetted length for a craft of specified loading condition and speed has also been developed. The work also comprises a study of the hydrodynamics of planing craft under two conditions: firstly, when it is heeled at a small angle, and secondly, when it is yawed at a small angle. For the heel case, the theory predicts a decrease in roll stability when the craft is planing at high speed. The computed hydrodynamic force and moment derivatives have shown reasonably good agreement with the experiment data obtained by other authors. The behaviour of these hydrodynamic derivatives at high speed has also been investigated. For the yaw case, the theory predicts an interesting feature of the development of suction under the outboard side of the hull at high planing speed. The theory also predicts a change in the direction of the induced roll moment which could well be directly related to the phenomena that some high speed crafts bank inwards during turning while others bank outwards.</p
Digital dissertation consortium
No full textby Michael Chi Fai Tong."Revised March 2000."Thesis (M.D.)--Chinese University of Hong Kong, 2000.Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web.Electronic reproduction. Ann Arbor, MI : ProQuest Information and Learning Company, [200-] System requirements: Adobe Acrobat Reader. Available via World Wide Web.Mode of access: World Wide Web
Fei xian xing xi tong de Beili qu lu
No full textIn this thesis, the critical phenomenon in Berry curvature of nonlinear systems that occurs at phase boundaries is described by using the Bogoliubov excitation of the semiquantal dynamics. Its is shown that when the critical boundary in the parameter space is crossed, the nonlinear geometric phase of the Bogloubov excitations surrounding the elliptic fixed points experiences non-analytic behavior.在本論文，我們利用半古典動力學的博戈留波夫激發研究非線性系統的貝里曲率在相邊界上出現的臨界現象。結果顯示，當參數空間中的臨界曲面被越過，環繞橢圓不動點的博戈留波夫激發的非線性幾何相位發生非解析行為。Kam, Chon Fai = 非線性系統的貝里曲率 / 甘駿暉.Thesis M.Phil. Chinese University of Hong Kong 2014.Includes bibliographical references (leaves 49-56).Abstracts also in Chinese.Title from PDF title page (viewed on 18, October, 2016).Kam, Chon Fai = Fei xian xing xi tong de Beili qu lu / Gan Junhui.Detailed summary in vernacular field only
Radiation Pattern Shaping by Applying Machine Learning Method
No full textIn this study, a new design method for designing surface wave antennas was proposed. The proposed antennas will support the vertical-looking radar (VLR) systems for better pest monitoring. The distribution of the metallic cells on the low-profile surface wave antenna is designed by using the Wasserstein generative adversarial network (WGAN) and bidirectional gated recurrent unit (Bi-GRU) neural network prediction method with the desired cosecant-squared radiation pattern serving as input. The proposed neural network prediction method consists of two parts, which are i) from the far-field radiation pattern to the near-zone E-field and ii) from the near-zone E-field to the on-surface metallic cell pattern. In the first prediction part, the average prediction error among Ex, Ey and Ez components on the surface wave antenna of 50 test cases is 4.3%. And the average prediction accuracy achieves 99.54% in the prediction of the metallic cell pattern from the near-zone E-field. A dual-sided 30º cosecant-squared radiation pattern serves as the input for the neural network prediction model in the surface wave antenna design. The predicted antenna geometry shows less than 1 dBi variation in radiation pattern when compared to the input dual-sided 30º cosecant-squared radiation pattern. The fabricated surface wave antenna works in the frequency band 33.77 – 35.05 GHz, which covers the frequency band of the mmWave FMCW VLR system. With the help of the turntable of the mmWave VLR system, such antenna provides a circular observation area with a diameter of 9.8 m
sj-docx-1-pmj-10.1177_02692163241238900 – Supplemental material for Death education interventions for people with advanced diseases and/or their family caregivers: A scoping review
No full textSupplemental material, sj-docx-1-pmj-10.1177_02692163241238900 for Death education interventions for people with advanced diseases and/or their family caregivers: A scoping review by Tong Wang, Kin Cheung and Huilin Cheng in Palliative Medicine</p
Recent results on observer-based compensation of linear systems
No full textBibliography: .71-72.Research supported by the National Aeronautics and Space Administration NASA/Ames Grant NGL 22-009-124.by K. Tong and T. L. Johnson
Fei xian xing liang zi xi tong de ji he xiang wei
No full textPh.D.Berry phases and gauge structures are fundamental quantum phenomena. In linear quantum mechanics the gauge field in parameter space presents monopole singularities where the energy levels become degenerate. In non-linear quantum mechanics, which is an effective theory of interacting quantum systems, there can be phase transitions and hence critical surfaces in the parameter space. We find that these critical surfaces result in a new type of gauge field singularity, namely, a conic singularity that resembles the big bang of a 2+1 dimensional de Sitter universe, with the fundamental frequency of Bogoliubov excitations acting as the cosmic scale, and mode softening at the critical surface, where the fundamental frequency vanishes, causing a causal singularity. Such conic singularity may be observed in various systems such as Bose-Einstein condensates, nonlinear optical systems, and molecular magnets. This finding offers a new approach to quantum simulation of fundamental physics.貝里相位及規範結構是基本的量子現象。在線性量子力學中，參數空間的能級交叉點就是其規範場的磁單極子。作為量子相互作用系統的有效理論，非線性量子力學存在相變，以及參數空間對應的臨界面。我們發現這些臨界面導致一類新的規範場結構，亦即一個對應於2+1維德西特宇宙的大爆炸的錐形奇點，其中波戈留波夫激發的基本頻率對應於宇宙的尺度因子，臨界面附近基本頻率趨於零的軟模導致因果奇點。這種錐形奇點可以用不同的系統觀測，如玻色-愛因斯坦凝聚，非線性光學系統，以及分子磁鐵系統。這個發現提供用量子系統模擬基本物理的新途徑。Kam, Chon Fai = 非線性量子系統的幾何相位 / 甘駿暉."December 2017."Thesis Ph.D. Chinese University of Hong Kong 2018.Includes bibliographical references (leaves 129-143).Abstracts also in Chinese.Title from PDF title page (viewed on 21 May, 2021).Kam, Chon Fai = Fei xian xing liang zi xi tong de ji he xiang wei / Kam Chon Fai
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