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control of settlement and volume loss induced by tunneling under recently reclaimed land

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Underground Space 2019年第4期4卷 289-301页

作者： A.K.L.kwong c.c.W.Ng A.Schwob AEcOM Hong KongChina Dragages-Bouygues Joint Venture Hong KongChina

The proposed Tuen Mun-chek Lap Kok Link(TM-cLKL)project comprises a 9-km-long dual two-lane carriageway between Tuen Mun and North Lantau,Hong *** of the two tunnels at the Northern Landfall Fall was carried out by two TBMs:the northbound is referred to as ML03 and has an excavated diameter of 17.63 m,and the southbound is referred to as ML02 and has an excavated diameter of 14.00 *** use of TBMs minimized the amount of dredging and removal of soft marine deposits,resulting in less impact to the environment within and near the work site of the *** treatment in the form of deep vibro-compaction was carried out at the sand fill and band drains installed in the marine deposit.A surcharge was also added above the final formation level to limit the residual settlement and differential settlement of the reclaimed land to less than 500 mm and 1 in 300,respectively,for a design life of 50 *** element analyses were performed to predict the settlement trough under different confinement pressures along the tunnel *** monitoring of the ground movement was carried out during the driving of the two TBMs to ensure that the design confinement pressure of the slurry would not cause excessive settlement,heave,or blow out at the shallow tunnel sections or different facilities along the tunnel *** monitoring data was then used to back-calculate the percentage of volume loss,which is a key index describing the behavior of the ground during *** monitoring data showed that the measured settlement and back-calculated volume loss were much lower than the predicted values.

关键词： TBM excavation Settlement trough Volume loss Ground treatment confinement pressure

Wash water in waterworks:contaminants and process options for reclamation

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Journal of Environmental Sciences 2008年第11期20卷 1300-1305页

作者： c B chidambara Raj Tan Ee kwong Soh Hoo Tiong paul Stefan Klose centre for Advanced Water Technology Singapore Utilities International Pte Ltd.82 Toh Guan Road East # C4-03Singapore 608575 public Utilities Board Water Supply (Plants) Department40 Scotts Road #14-00Singapore 228231

Reclamation of clean water from filter backwash water was studied through pilot-scale *** pilot plant consisted of clarification,sand-filtration,and ultrafiltration modules in sequence,with a provision to bypass the sand *** water that conformed to World Health Organization (WHO) guidelines on potable Quality was ***,aluminum and iron were found to be critical contaminants in process selection and ***,followed by sand filtration,was found to be the minim...

关键词： filter backwash clarification water treatment aluminium Giardia

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可伸缩产品平台优化设计的质量功能展开方法

机械工程学报 2011年第12期47卷 175-184页

作者：雒兴刚王福斌 kwong c K 东北大学信息学院沈阳110819 东北大学机械工程与自动化学院沈阳110819 香港理工大学工业与系统工程系

为使基于产品平台的系列产品更好的满足顾客需求,提出一种基于质量功能展开的方法,可以优化设计可伸缩产品平台。该方法的主要思路是应用质量功能展开技术,建立单个产品的质量屋,确定其最优工程特性值,对每个工程特性进行敏感性分析,并... 详细信息

为使基于产品平台的系列产品更好的满足顾客需求,提出一种基于质量功能展开的方法,可以优化设计可伸缩产品平台。该方法的主要思路是应用质量功能展开技术,建立单个产品的质量屋,确定其最优工程特性值,对每个工程特性进行敏感性分析,并根据所得的工程特性敏感性指标建立优化模型,求得最优的平台工程特性值和非平台工程特性值。优化模型的目标是最大化一个产品族中所有产品变体的顾客满意度的均值,约束主要包括顾客需求和工程特性之间的函数关系以及工程特性之间的自相关函数关系。模型中采用了线性函数形式,并采用回归方法来估计函数中的参数。给出一个工业卡钳的例子来验证所提方法的可行性,案例分析的结果表明,该方法比传统的两阶段方法能获得更好的顾客满意度。

关键词：质量功能展开产品平台顾客满意度

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产品族设计的多目标优化方法

计算机集成制造系统 2011年第7期17卷 1345-1355页

作者：雒兴刚蔡莉青 c.K.kwong 东北大学信息科学与工程学院辽宁沈阳110819 香港理工大学工业与系统工程系香港999077

为帮助产品开发团队在设计产品族的过程中,可以交互选择多种目标的优化方案,提出了产品族设计的多目标优化模型,并设计了多目标遗传算法对模型进行求解。建模过程中考虑了市场分割、产品效用、竞争产品、顾客购买行为、产品开发费用等... 详细信息

为帮助产品开发团队在设计产品族的过程中,可以交互选择多种目标的优化方案,提出了产品族设计的多目标优化模型,并设计了多目标遗传算法对模型进行求解。建模过程中考虑了市场分割、产品效用、竞争产品、顾客购买行为、产品开发费用等因素。通过一个应用案例,验证了所提模型和方法的可行性。

关键词：产品族多目标优化联合分析遗传算法产品开发

Recent Expedition in pd-catalyzed Sonogashira coupling and Related processes

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chinese Journal of chemistry 2023年第9期41卷 1099-1118页

作者： pui Ying choy Kin Boon Gan Fuk Yee kwong Department of chemistry and State Key Laboratory of Synthetic chemistry The Chinese University of Hong KongShatinNew TerritoriesHong Kong SARChina Shenzhen center of Novel Functional Molecules Shenzhen Municipal Key Laboratory of Chemical Synthesis of Medicinal Organic MoleculesCUHK Shenzhen Research InstituteNo.10.Second Yuexing RoadShenzhenGuangdong 518507China

Sonogashira cross-coupling protocol,typically showing the reaction between aryl/vinyl halide and terminal alkyne,has been a widely used protocol for constructing c(sp2)-c(sp)*** resulting internal alkynes are highly versatile for reaching differently function-alized alkyne-containing scaffolds or serving as valuable synthetic synthons to many other functional *** is worth noting that products originated from this coupling reaction are mostly applicable to be transformed into corresponding Z-alkene,alkane,or het-erocyclic moieties in natural product *** reaction conditions and catalyst systems are able to be tweaked in order to facil-itate the activation of steric hindered and/or electron-rich ***-catalyzed copper-free Sonogashira coupling reaction has caught increasing attention as the improved method can be more environmentally *** is more,the conditions of the cou-pling reaction can be readily amended to allow the fusion of other carbonylation or decarboxylation step in the catalytic cycle,and thus allow more complex yet versatile convergent synthesis to proceed in an operationally simple one-pot manner.

关键词： Sonogashira Alkynylation palladium Multicomponent reactions cross-coupling

Sustainable Application of a Novel Water cycle Using Seawater for Toilet Flushing

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Engineering 2016年第4期2卷 460-469页

作者： Xiaoming Liu Ji Dai Di Wu Feng Jiang Guanghao chen Ho-kwong chui Mark c. M. van Loosdrecht Department of civil and Environmental Engineering The Hong Kong University of Science and Technology Hong Kong China Water Technology center The Hong Kong University of Science and Technology Hong Kong China chinese National Engineering Research center for control and Treatment of Heavy Metal pollution (Hong Kong Branch) The Hong Kong University of Science and Technology l-long Kong China School of chemistry and Environment South China Normal University Guangzhou 510006 China Department of Biotechnology Delft University of Technology Delft2629 HZ the Netherlands

Global water security is a severe issue that threatens human health and well-being. Finding sustainable alternative water resources has become a matter of great urgency. For coastal urban areas, desalinated seawater could serve as a freshwater supply. However, since 20%-30% of the water supply is used for flushing waste from the city, seawater with simple treatment could also partly replace the use of freshwater. In this work, the freshwater saving potential and environmental impacts of the urban water system （water-wastewater closed loop） adopting seawater desalination, seawater for toilet flushing （SWTF）, or reclaimed water for toilet flushing （RWTF） are compared with those of a conventional freshwater system, through a life-cycle assessment and sensitivity analysis. The potential applications of these processes are also assessed. The results support the environmental sustainability of the SWTF approach, but its potential application depends on the coastal distance and effective population density of a city. Developed coastal cities with an effective population density exceeding 3000 ***-2 and located less than 30 km from the seashore （for the main pipe supplying seawater to the city） would benefit from applying SWTF, regardless of other impact parameters. By further applying the sulfate reduction, autotrophic denitrification, and nitrification integrated （SANI） process for wastewater treatment, the maximum distance from the seashore can be extended to 60 km. considering that most modern urbanized cities fulfill these criteria, the next generation of water supply systems could consist of a freshwater supply coupled with a seawater supply for sustainable urban development.

关键词： Alternative water resources Seawater toilet flushing SANIUrban water system Life-cycle assessment

A profit-oriented approach for selection of new product scheme

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A profit-oriented approach for selection of new product sche...

An Optimization Model for Determining Optimal Levels of Engineering characteristics in QFD under Multi-Segment Market

第24届中国控制与决策会议

作者： c.K. kwong Department of Industrial and Systems Engineering The Hong Kong Polytechnic UniversityHung Hom Kowloon Hong Kong PRC

The multinomial logit （MNL） consumer choice rules employed in the extant product design research assume that a product always has a market share even though the product has a very low utility value. In this paper, a new consumer choice rule integrating the dollar-scaled utility with piecewise logit function is proposed to avoid estimation bias caused by this problem. A profit maximizing model under the proposed rule is established in a multi-segment product market. It has been proven that in an unpartitioned product market, a local optimal solution of the model is also a global optimal solution, and hence standard nonlinear programming algorithms can be applied. An algorithm based on interval analysis is developed to solve the model under a multi-segment market. Finally, an example of selection of new product scheme is given to illustrate the feasibility and effectiveness of the proposed model and algorithm.

关键词： new product development product design product positioning consumer choice rule.

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An Optimization Model for Determining Optimal Levels of Engi...

Asymmetric hydrogenation of aromatic ketones using new chiral-bridged diphosphine/diamine-Ru(Ⅱ) complexes

2011 chinese control and Decision conference（ccDc）

作者： c.K.kwong Department of Industrial and Systems Engineering The Hong Kong Polytechnic University

An optimization model for a multi-segment market based on quality function deployment is established to maximize customers’ overall customer *** weights of importance of market segments and development costs in the model are expressed as triangular fuzzy numbers in order to describe the imprecision caused by human subjective *** solving approach for the fuzzy optimization model is suggested.A case study is given to illustrate the feasibility of the proposed method.

关键词： quality function deployment new product development customer requirements engineering characteristics fuzzy optimization

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chinese chemical Letters 2010年第12期21卷 1403-1406页

作者： Yu Ming cui Lai Lai Wang Fuk Yee kwong Wei Sun State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China Open Laboratory of chirotechnology of the Institute of Molecular Technology for Drug Discovery and Synthesis and Department of Applied Biology and chemical technology The Hong Kong Polytechnic University Hong Kong China Graduate University of chinese Academy of Sciences Beijing 100039 China

A series of chiral secondary alcohols were easily prepared by means of asymmetric hydrogenation of prochiral aromatic ketones using a new（（Rax）-Bup）/（R,R）-DpEN-Ru（Ⅱ） complex catalyst *** hydrogenation of 2-methylacetophenone in n-butanol （t-BuOK/Ru =45.6/1,S/c = 500,20 *** H2,20℃,48 h） afforded（S）-1-（2＇-methylphenyl）ethanol in 92%ee and〉99% conversion.

关键词： Asymmetric hydrogenation chiral alcohols Diphosphine ligand Ruthenium complexes Diamine