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A HYDRODYNAMIC LARGE-EDDY SIMULATION-MODEL USING DIRECTIONAL EDDY VISCOSITY METHOD IN VERTICAL DIRECTION

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Journal of Hydrodynamics 1998年第1期10卷 36-43页

作者： Zhan Jie-minDept. of Applied Mechanics and Engineering, Zhangshan university, Guangzhou 510275,P. R. ChinaY.S.LiDept.of Civil & Structural Engineering, the hong kong polytechnic university, hong kong

A non-linear turbulent hydrodynamic model was proposed by Zhan and Li (1993) using the large eddy simulation approach and directional eddy viscosity method. The model is simplified in this paper and is applied to the problem of a side discharge into open-channel flow,where a recirculation zone develops downstream of the discharge. The numerical results are compared with experimental results (Strazisar and Prahl (1973) and Mikhail, Chu, and Savage (1975)) and previous numerical results obtained using a k-model (McGuirk and Rodi, 1978). The agreement is good.

关键词： large eddy simulation 3-D numerical model turbulence hydrodyna-mice

Plant　Engineering　Education　for　Aircraft　Industry　in　hong　kong

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International Journal of Plant Engineering and Management 1996年第1期1卷 22-28页

作者： T.T. Wong Department of Mechanical Engineering the hong kong polytechnic university, hong kong

The rapid growth of air traffic, the numerous largescale infrastructure developments such as the new airport core project, various road tunnels and waste treatment plants, as well as the large number of highrise buildings in hong kong have led to increased demands on engineering maintenance services. In order to cope with such plant services it is imperative that a steady supply of young, conscientious and competent plant operation and maintenance engineers be provided. To achieve this aim suitable plant engineering programs are required to meet the needs of various public and private sectors. This paper gives an account of the developments leading to the present situation in hong kong. In view of the United Nations forecast growth rate of air traffic in the AsiaPacific region, the development of plant engineering education and training programmes in the aircraft industry would be dealt with in a detailed manner. The role played by the engineering industry and the professional societies are also described.

关键词： Plant Engineering Education Training

Experimental study of human-induced effects on floor slab of an ancient Tibetan structure

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Earthquake Engineering and Engineering Vibration 2012年第4期11卷 513-523页

作者： Yang Na Guo Ting S.S. Law School of Civil Engineering Beijing Jiaotong University Civil and Structural Engineering Department Hong Kong Polytechnic University

With the opening of ancient Tibetan structures to visitors worldwide, human load has become the principal live load on these structures. This project studies the properties of the floor structure of an ancient Tibetan building and its behavior under human-induced load effects. Tests were conducted with static and dynamic crowd load, including stepping and jogging by people at a fixed position. The tests show that the floor structure does not behave as a continuous slab. It takes the load from local areas with minimal load transference properties. The acceleration response shows significant peaks when the footstep frequency is close to the natural frequency of the s~＇ucture, but the human jogging excitation frequency does not have any obvious effect on the structural response. The elastic modulus of the Agatu material is estimated to be close to zero from the measured natural frequency of the slab. The Agatu material is concluded to be a discrete compacted material with insignificant contribution to the structural rigidity of the floor slab.

关键词： ancient Tibetan structure crowd load static dynamic floor slab Agatu elastic modulus

Surface Characterization of Laser Surface Melted NiTi Shape Memory Alloy in Hanks' Solution

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材料热处理学报 2004年第5B期25卷 988-991页

作者： CUIZhen-duo ZHUSheng-li MANHauchung YANGXian-jin SchoolofMaterialsScienceandEngineering TianjinUniversityTianjin300072China DepartmentoflndustrialandSystemsEngineering TheHongKongPolytechnicUniversityHungHomKowloonHongKongChina

The surface of Ti-50.8Ni at% shape memory alloy was melted by an Nd-YAG laser. The Ti/Ni and Ti4+/Ti atomic concentration ratios at the surface were changed significantly. The Ni ion release rate of the laser melted surface was much lower than that of the mechanical polished samples. A calcium-phosphorous layer with high Ca/P ratio was detected after immersion in Hanks’ solution.

关键词：离子释放速率形状记忆合金激光表面熔解生物材料

Multi-level biomechanical models for rehabilitation engineering

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医用生物力学 2010年第S1期25卷 18-19页

作者： Ming Zhang(Department of Health Technology and Informatics,the hong kong polytechnic university,hong kong,China)

Rehabilitation engineering aims in the upmost degree to restore the lost functions for those persons with physical disability. Biomechanical modeling has been widely used for different purposes in rehabilitation engin... 详细信息

关键词： body Multi-level biomechanical models for rehabilitation engineering

DEVELOPMENT AND APPLICATION OF A EUTROPHICATION WATER QUALITY MODEL FOR RIVER NETWORKS

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Journal of Hydrodynamics 2008年第6期20卷 719-726页

作者： ZHANG Ming-liang SHEN Yong-ming GUO Yakun State Key Laboratory of Coastal and Offshore Engineering Dalian University of Technology Dalian 116023 China Department of Civil and Structural Engineering The Hong Kong Polytechnic University Hong Kong China Department of Engineering University of Aberdeen Aberdeen AB24 3UE UK

The Preissmann implicit scheme was used to discretize the one-dimensional Saint-Venant equations, the river-junction-fiver method was applied to resolve the hydrodynamic and water quality model for river networks, and the key issues on the model were expatiated particularly in this article. This water quality module was designed to compute time dependent concentrations of a series of constituents, which are primarily governed by the processes of advection, dispersion and chemical reactions. Based on the theory of Water Quality Analysis Simulation Program （WASP） water quality model, emphasis was given to the simulation of the biogeochemical transformations that determine the fate of nutrients, in particular, the simulation of the aquatic cycles of nitrogen and phosphorus compounds. This model also includes procedures for the determination of growth and death of phytoplankton. This hydrodynamic and water quality model was applied to calculate two river networks. As illustrated by the numerical examples, the calculated water level and discharge agree with the measured data and the simulated trends and magnitudes of water quality constituents are generally in good agreement with field observations. It is concluded that the presented model is useful in the pollutant control and in the determination of pollutant-related problems for river networks.

关键词： Preissmann implicit scheme river networks hydrodynamic model water quality model biogeochemical transformations three-step method

Variation of the Multifocal Visual Evoked Potential with Eccentricity in Isometropic Amblyopes

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眼科学报 1997年第3期13卷 148-155页

作者： Minzhong Yu, Brian Brown Marion EdwardsDepartment of Optometry and Radiography, the hong kong polytechnic university, hong kong, China Zhongshan Ophthalmic Center, Sun Yat-sen university of Medical Sciences, and National Ophthalmological Laboratories, Ministry of Public Health, China, Guangzhou 510060, China Department of Optometry and Radiography Hong Kong Polytechnic University China

Purpose: To investigate the variation of visual function in different eccentricities of the visual field in isometropic ***: The stimulus matrix containing 61 hexagons was generated on a monitor. The diameter of the entire stimulating field was approximately 13.6 deg of arc; the frame rate of the monitor was 67 Hz. Every hexagon of the display contained a number of black and white small hexagonal patches which reversed during stimulation. These hexagons were simultaneously but independently modulated in time by the controlling computer program. The flashed elements were selected differently on each frame according to a computer-generated binary pseudo-random time series (m-sequence); the response contributions from each of the individual stimulus elements could be extracted from the cross corre-ation function. Subjects were asked to maintain fixation at the center of the stimulus pattern while each of the hexagons of the display reversed. The VERB system extracted the local responses by

关键词：视觉博起电压弱视屈光相等视野离心率 VEP

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优质服务销售:缩小在普通服装店的差距

天津纺织工学院学报 1997年第1期16卷 61-66页

作者： Leung Chunsun Liu Kakeung (the hong kong polytechnic university) 香港理工大学

本文用Ｐａｒａｓｕｒａｍａｎ的服务质量差距模型调查了服务－执行的差距（Ｇａｐ３）．对在香港的两个便服零售商研究的结果进行了讨论，比较了经理和服务者对Ｇａｐ３测定的结果．在一般销售店的售货员认为，他们的服务质量未能达到... 详细信息

本文用Ｐａｒａｓｕｒａｍａｎ的服务质量差距模型调查了服务－执行的差距（Ｇａｐ３）．对在香港的两个便服零售商研究的结果进行了讨论，比较了经理和服务者对Ｇａｐ３测定的结果．在一般销售店的售货员认为，他们的服务质量未能达到经理的要求．关于服务者对Ｇａｐ３的贡献有７个概念因素：（１）角色模糊；（２）角色冲突；（３）雇员与工作间的适应性；（４）技术与工作的适应性；（５）监督控制系统；（６）理解控制，（７）工作组．结果表明“角色冲突”和“理解控制”

关键词：优质服务销售服装店服装工业

Facile Synthesis of Chiral Conjugated Polymer Based on BINOL Skeleton

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Chinese Chemical Letters 2000年第1期11卷 29-30页

作者： Chun E DONG Yong Gang ZHI Zuo Long YU Liang Fu ZHANG Albert. S. C. CHAN (Chengdu institute of organic chemistry Academ Sinica Chengdu 610041 hong kong polytechnic university, hongkong) Chengdu Inst. of Organic Chemistry Academ Sinica Chengdu 610041 China hong kong polytechnic university HongKong Hong Kong

A new type of chiral conjugated polymers 6a-d has been synthesized by the reaction of (R)-2,2'-dihydroxy-1,1'-binaphthyl-6,6'-dicarbaldehyde 5 with corresponding diamine in the presence of acetic acid.

关键词： chiral conjugated polymers synthesis BINOL