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Statistical characteristics of chlorophyll-a concentration in hong kong's coastal waters

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Journal of Geographical Sciences 2002年第3期12卷 331-342页

作者： CHEN Xiaoling, Yok Sheung Li, LI Zhilin(1. Dept. of Civil and Structural Engineering, The hong kong polytechnic university, hong kong, China 2. National Laboratory for Information Engineering in Surveying, Mapping and Remote Sensing (LIESMARS), Wuhan Uni Dept. of Civil and Structural Engineering The Hong Kong Polytechnic University 香港 Wuhan university National Laboratory for Information Engineering in Surveying Mapping and Remote Sensing (LIESMARS) Wuhan 430072 Dept. of Land Surveying & Geo-Informatics The Hong Kong Polytechnic University 香港

In this paper seven of the ten Water Control Zones (WCZs) in hong kong's coastal waters with monthly or bi-weekly sampling data of 17 parameters collected at 37 monitoring stations from 1988 to 1999 were selected to analyze the spatial and temporal variations of chlorophyll-a and its influencing factors. Cluster analysis was employed to group the monitoring stations based on the structure of the data set. Multiple step regression was employed to determine the significant influencing factors of chlorophyll-a level. The results suggest that all the monitoring stations could be grouped into two clusters. Cluster Ⅰ with frequent red tide incidents comprises two WCZs which are semi-enclosed bays. Cluster Ⅱ with less red tide occurrence comprises the other five WCZs in an estuarine environment in the west. For both clusters, the organic contents indicator, BODS, was a common significant influencing factor of the chlorophyll-a level. Nitrogen and light penetration condition related to turbidity, total volatile solids and suspended solids had more influence on the cholophyll-a level in Cluster Ⅰ than in Cluster Ⅱ, while phosphorus and oceanographic conditions associated with salinity, temperature, dissolved oxygen and pH were more important in Cluster Ⅱ than in Cluster Ⅰ. Generally, there was a higher average chlorophyll-a level in winter and autumn in a year. The chlorophyll-a level was much higher in Cluster Ⅰ than in Cluster Ⅱ among all seasons. Although the chlorophyll-a concentration had great variations from place to place in hong kong's coastal waters, it seemed to have a common long term fluctuation period of 8-10 years with a high-low-high variation in the period in the whole region, which might be influenced by other factors of global scale.

关键词： hong kong's coastal waters chlorophyll-a concentration spatial-temporal variations

Advanced nanostructured materials for the biomedicine and nanomechnical applications

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Advanced nanostructured materials for the biomedicine and na...

US-China NSF Workshop and Summer Institute of Bio-and Nano-Mechanics and Applications

作者： Jian LU Department of Mechanical Engineering The hong kong polytechnic university Hung Horn Kowloon hong kong China

＜正＞This talk will summarize our recent works related to the study of the mechanical behavior of the nanostructured materials and their potential applications in the fields of biomedicine and nanomechanics studies.

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铁代谢蛋白在肾脏的表达与功能

生物化学与生物物理进展 2011年第2期38卷 113-118页

作者：蔺艳钱忠明柯亚香港理工大学应用生物化学系香港中文大学医学院生物医学学院

最近的研究证实,肾小管细胞具有能力表达包括转铁蛋白受体1(transferrin receptor-1,TfR1)、二价金属离子转运蛋白1(divalent metal transporter-1,DMT1)、膜铁转运蛋白1(ferroportin-1,FPN1)、铁调节蛋白(iron regulatory protein,IRP)和铁调素(hepcidin,Hepc)在内的几乎所有铁代谢蛋白.这些蛋白质的存在以及相关研究显示肾脏可能具有排出多余铁的功能,因此对体铁平衡起有十分重要的作用.

关键词：肾小管铁代谢蛋白排铁铁平衡

DYNAMIC ADVANCED PLANNING AND SCHEDULING （DAPS） WITH FROZEN INTERVAL FOR NEW ORDERS

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DYNAMIC ADVANCED PLANNING AND SCHEDULING （DAPS） WITH FROZE...

2005年中国机械工程学会年会

作者： CHEN KEJIA, JI PING (Department of Industrial and Systems Engineering, The hong kong polytechnic university, hong kong, China)

＜正＞This paper addresses a dynamic advanced planning and scheduling （DAPS） problem where new orders arrive on a continuous basis. A periodic policy with frozen interval is adopted to increase stability on the shop floor. A genetic algorithm is developed to find a schedule at each rescheduling point for both original orders and new orders that both production idle time and penalties on tardiness and earliness of orders are minimized. The proposed methodology is tested on a small example to illustrate the effect of the frozen interval. The results indicate that the suggested approach can improve the schedule stability while retaining efficiency.

关键词： dynamic advanced planning and scheduling genetic algorithm frozen interval

TURBULENT FLOW CONTROL BASED ON SMALL PERTURBATIONS

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TURBULENT FLOW CONTROL BASED ON SMALL PERTURBATIONS

庆祝中国力学学会成立50周年暨中国力学学会学术大会’2007

作者： ZHOU Yu (Department of Mechanical Engineering The hong kong polytechnic university,Hung Hom,Kowloon,hong kong China)

This talk presents a compendium of recent progress in the application of a novel technique for the control of turbulent *** essence of the technique is to create a local perturbation on the wall,over which flow blows,...

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Numerical studies on smoke control in spaces adjacent to atria

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Numerical studies on smoke control in spaces adjacent to atr...

第十二届全国计算流体力学会议

作者： W.K. Chow (Department of Building Services Engineering, The hong kong polytechnic university, hong kong, China)

＜正＞Smoke control design in adjacent spaces to ’open-design’ atrium was evaluated using Computational Fluid Dynamics （CFD） or known as Numerical Heat Transfer （NHT）. The design is to install mechanical system for injecting air from the adjacent level to the atrium for preventing smoke spreading to those area. Two questions encountered on practical design of smoke management system in an atrium were discussed by carrying out six sets of CFD/NHT simulations. This paper is not on ’validating’ or ’verifying’ CFD/NHT packages, but on ’demonstrating’ how the results can be applied.

关键词： Smoke control CFD NHT atrium fire

Eigenvalues of Tensors and Their Applications

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Eigenvalues of Tensors and Their Applications

中国运筹学会成立三十周年庆祝大会暨2010年全国学术交流年会

作者： Liqun Qi~(1,*) 1 Department of Applied Mathematics,The hong kong polytechnic university

We are stepping to a new territory of applied *** are developing computational multilinear algebraic methods for higher-order tensors,which are parallel to the matrix theory. We are studying mathematical properties of tensors,such as eigenvalues and characteristic polynomials of tensors,tensor decomposition and tensor approximation,*** new subject has found applications and links from data analysis,automatic control,magnetic resonance imaging,optimization,solid mechanics,quantum physics,higher order Markov chains,spectral hypergraph theory,Finsler geometry and relativity theory,***,linear convergence has been established for algorithms for finding the largest eigenvalue of a nonnegative *** serious exploration on these aspects is needed.I hope that more researchers will join us to explore this new field.

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MULTISCALE EXPERIMENTAL AND COMPUTATIONAL MECHANICS FOR THE STUDY OF NANOSTRUCTURED MATERIALS

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MULTISCALE EXPERIMENTAL AND COMPUTATIONAL MECHANICS FOR THE ...

庆祝中国力学学会成立50周年暨中国力学学会学术大会’2007

作者： LU Jian~(1)) (Department of Mechanical Engineering,the hong kong polytechnic university,Hung Hom Kowloon,hong kong,China)

This talk will summarize the recent work related to the study of the mechanical behavior of the nanostructured *** basic concept of surface nanocrystallization of materials will be *** terms of the grain refinement mechanism induced by random plastic deformation,a novel surface mechanical attrition(SMA) technique was developed for synthesizing a nanostructured surface layer on metallic materials in

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二价金属离子转运蛋白1——一个新发现的重要铁转运蛋白

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生物化学与生物物理进展 2002年第2期29卷 184-188页

作者：柯亚钱忠明香港理工大学应用生物及化学科技学系

二价金属离子转运蛋白 1(divalentmetaltransporter 1,DMT1)的发现是近年铁代谢研究领域最重大的一项突破 .DMT1是哺乳类跨膜铁转运蛋白 .这种蛋白质广泛分布于人体各组织 .DMT1mRNA有两种形式 ,一种含有IRE (ironresponseelement) ,而... 详细信息

二价金属离子转运蛋白 1(divalentmetaltransporter 1,DMT1)的发现是近年铁代谢研究领域最重大的一项突破 .DMT1是哺乳类跨膜铁转运蛋白 .这种蛋白质广泛分布于人体各组织 .DMT1mRNA有两种形式 ,一种含有IRE (ironresponseelement) ,而另一种则不含此结构 .DMT1的功能主要是介导小肠上皮细胞的铁吸收以及参与铁从内吞小体移位到胞浆的过程 .DMT1介导的铁转运是一个主动的和H+依赖的过程 .DMT1也参与其他二价金属如Zn2 +、Mn2 +、Co2 +、Cd2 +、Cn2 +、Ni2 +和Pb2 +的转运 .小肠DMT1的表达受饮食或组织铁控制 .第四跨膜区是DMT1的重要功能区 .此区基因发生点突变 (G185R)是导致不可逆性缺铁性贫血的原因 .在帕金森氏病人的黑质发现DMT1表达异常增加 ,因而DMT1可能也与某些神经退行性疾病的形成有关 .

关键词：二价金属离子转运蛋白1 铁转运蛋白 DMT1 铁代谢神经退行性疾病贫血遗传性血色素沉积症