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Frontiers of Chemical Science and Engineering 2022年第5期16卷 564-591页

作者： Pei Sean Goh Kar Chun wong Tuck Whye wong Ahmad Fauzi Ismail Advanced Membrane Technology Research Centre(AMTEC) School of Chemical and Energy EngineeringFaculty of EngineeringUniversiti Teknologi Malaysia81310 Johor BahruMalaysia

Polyamide thin film composite membranes have dominated current reverse osmosis market on account of their excellent separation performances compared to the integrally skinned *** their very promising separation performance,chlorine-induced degradation resulted from the susceptibility of polyamide toward chlorine attack has been regarded as the Achilles’s heel of polyamide thin film *** free chlorine species present during chlorine treatment can impair membrane performance through chlorination and depolymerization of the polyamide selective *** material point of view,a chemically stable membrane is crucial for the sustainable application of membrane separation process as it warrants a longer membrane lifespan and reduces the cost involved in membrane *** strategies,particularly those involved membrane material optimization and surface modifications,have been established to address this *** review discusses membrane degradation by free chlorine attack and its correlation with the surface chemistry of *** advancement in the development of chlorine resistant polyamide thin film composite membranes is reviewed based on the state-of-the-art surface modifications and tailoring approaches which include the in situ and postfabrication membrane modifications using a broad range of functional *** challenges and future directions in this field are also highlighted.

关键词： reverse osmosis polyamide thin film composite membranes chlorine resistance surface modification

Photocatalysis: Preface

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Journal of Environmental Sciences 2017年第10期29卷 1-2页

作者： Po Keung wong The Chinese University of Hong Kong

A recent search of the keyword＂Photocatalysis＂in the CAS Sci Finder？database shows that at least 5,000 articles on this topic have been published each year from 2014 *** is expected that even more articles on this ... 详细信息

关键词： Preface Ti Photocatalysis

Lockdown lifted:measuring spatial resilience from London’s public transport demand recovery

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Geo-Spatial Information Science 2023年第4期26卷 685-702页

作者： Divya Sharma Chen Zhong Howard wong Centre for Advanced Spatial Analysis University College LondonLondonUK Transport Consulting ArupLondonUK Public Transport Service Planning Transport for LondonLondonUK

The disruptive effects of the COVID-19 pandemic has rapidly shifted how individuals navigate in *** are concerned that travel behavior will shift toward a car-driven and homeworking future,shifting demand away from public transport *** concerns place the recovery of public transport in a possible crisis.A resilience perspective may aid the discussion around recovery-particularly one that deviates from pre-pandemic *** paper presents an empirical study of London’s public transport demand and introduces a perspective of spatial resilience to the existing body of research on post-pandemic public transport *** study defines spatial resilience as the rate of recovery in public transport demand within census boundaries over a period after lockdown restrictions were *** relationship between spatial resilience and urban socioeconomic factors was investigated by a global spatial regression model and a localized perspective through Geographically Weighted Regression(GWR)*** this case study of London,the analysis focuses on the period after the first COVID-19 lockdown restrictions were lifted(June 2020)and before the new restrictions in mid-September *** analysis shows that outer London generally recovered faster than inner *** of income,car ownership and density of public transport infrastructure were found to have the greatest influence on spatial patterns in ***,influential relationships vary locally,inviting future research to examine the drivers of this spatial ***,this research recommends transport policymakers capture the influences of homeworking,ensure funding for a minimum level of service,and advocate for a polycentric recovery post-pandemic.

关键词： Spatial resilience demand recovery public transport COVID-19 pandemic London

Experimental study of path planning problem using EMCOA for a holonomic mobile robot

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Journal of Systems Engineering and Electronics 2021年第6期32卷 1450-1462页

作者： MOHSENI Alireza DUCHAINE Vincent wong Tony Department of System Engineering École de Technologie SupérieureMontreal QC H3C 1K3Canada

In this paper,a comparative study of the path planning problem using evolutionary algorithms,in comparison with classical methods such as the A*algorithm,is presented for a holonomic mobile *** configured navigation system,which consists of the integration of sensors sources,map formatting,global and local path planners,and the base controller,aims to enable the robot to follow the shortest smooth path ***-based mapping is used for scoring paths efficiently,allowing the determination of collision-free trajectories from the initial to the target *** work considers the evolutionary algorithms,the mutated cuckoo optimization algorithm(MCOA)and the genetic algorithm(GA),as a global planner to find the shortest safe path among others.A non-uniform motion coefficient is introduced for MCOA in order to increase the performance of this algorithm.A series of experiments are accomplished and analyzed to confirm the performance of the global planner implemented on a holonomic mobile *** results of the experiments show the capacity of the planner framework with respect to the path planning problem under various obstacle layouts.

关键词： holonomic robot path planning evolutionary algorithm(EA)

Multi-line code: A low complexity revocable fingerprint template for cancelable biometrics

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Journal of Central South University 2013年第5期20卷 1292-1297页

作者： wong Wei-jing wong Mou-ling Dennis KHO Yau-hee Faculty of Engineering Computing and ScienceSwinburne University of Technology(Sarawak Campus)

A low computational cost cancelable fingerprint template, namely the multi-line codes was proposed. The formulation of a single-line code involves the inspection of minutiae distribution along a straight line constructed based on the reference minutia. Multi-line code is introduced to elevate the performance by combining several single-line codes. Experiments were carried out on a few FVC databases. It has been proven that the proposed method yields relatively low computational complexity as compared to existing minutiae distribution-based methods, while preserving the performance. The equal error rate obtained for FVC2002 DB1 is 4.69% in stolen-key case, and the total arithmetic operations utilized are 14 520 additions and zero multiplication.

关键词： cancelable fingerprint template multi-line code single-line code stolen-key case

Glycemic index and glycemic load of selected Chinese traditional foods

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World Journal of Gastroenterology 2010年第12期16卷 1512-1517页

作者： Stephen Heung-sang wong Department of Sports Science and Physical Education The Chinese University of Hong Kong

AIM:To determine the glycemic index(GI)and glycemic load(GL)values of Chinese traditional foods in Hong ***:Fifteen healthy subjects(8 males and 7 females)volunteered to consume either glucose or one of 23 test foods after 10-14 h overnight *** blood glucose concentrations were analyzed immediately before,15,30,45,60,90 and 120 min after food consumption using capillary blood *** GI value of each test food was calculated by expressing the incremental area under the blood glucose response curve(IAUC)value for the test food as a percentage of each subject's average IAUC value for the *** GL value of each test food was calculated as the GI value of the food multiplied by the amount of the available carbohydrate in a usual portion size,divided by ***:Among all the 23 Chinese traditional foods tested,6 of them belonged to low GI foods(Tuna Fish Bun,Egg Tart,Green Bean Dessert,Chinese Herbal Jelly,Fried Rice Vermicelli in Singapore-style,and Spring Roll),10 of them belonged to moderate GI foods(Baked Barbecued Pork Puff,Fried Fritter,"Mai-Lai"Cake,"Pineapple"Bun,Fried Rice Noodles with Sliced Beef,Barbecue Pork Bun,Moon Cakes,Glutinous Rice Ball,Instant Sweet Milky Bun,and Salted Meat Rice Dumpling),the others belonged to high GI foods(Fried Rice in Yangzhou-Style,Sticky Rice Wrapped in Lotus Leaf,Steamed Glutinous Rice Roll,Jam and Peanut Butter Toast,Plain Steamed Vermicelli Roll,Red Bean Dessert,and Frozen Sweet Milky Bun).CONCLUSION:The GI and GL values for these Chinese traditional foods will provide some valuable information to both researchers and public on their food preference.

关键词： Glycemic index Glycemic load Chinese traditional foods

Characterization of convex domains in C^2 with non-compact automorphism group

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Science China Mathematics 2017年第6期60卷 977-984页

作者： HAMANN Kaylee wong Bun Department of Mathematics University of California at Riverside

In the field of several complex variables, the Greene-Krantz Conjecture, whose consequences would be far reaching, has yet to be proven. The conjecture is as follows： Let D be a smoothly bounded domain in Cn. Suppose there exists {gj} C Aut（D） such that {gj（z）} accumulates at a boundary point p ∈δD for some z C D. Then DD is of finite type at p. In this paper, we prove the following result, yielding further evidence to the probable veracity of this important conjecture： Let D be a bounded convex domain in C2 with C2 boundary. Suppose that there is a sequence {gj} Aut（D） such that {gj（z）} accumulates at a boundary point for some point z ∈ D. Then if p E OD is such an orbit accumulation point, OD contains no non-trivial analytic variety passing through p.

关键词： characterization convex domains automorphism groups

Error Bounds for Uniform Asymptotic Expansions-Modified Bessel Function of Purely Imaginary Order

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Chinese Annals of Mathematics,Series B 2010年第5期31卷 759-780页

作者： Wei SHI Roderick wong Wuhan Institute of Physics and Mathematics The Chinese Academy of Sciences Wuhan 430071 China. Department of Mathematics City University of Hong Kong Tat Chee Avenue Kowloon Hong Kong China.

The authors modify a method of Olde Daalhuis and Temme for representing the remainder and coefficients in Airy-type expansions of *** using a class of rational functions,they express these quantities in terms of Cauchy-type integrals;these expressions are natural generalizations of integral representations of the coe?cients and the remainders in the Taylor expansions of analytic *** using the new representation,a computable error bound for the remainder in the uniform asymptotic expansion of the modified Bessel function of purely imaginary order is derived.

关键词： Modified Bessel function of purely imaginary order Airy function Uniform asymptotic expansion Error bound

SMA molecular line survey towards the massive star-forming region G10.6-0.4in W31complex

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Research in Astronomy and Astrophysics 2018年第11期18卷 29-42页

作者： Wai-Ho wong Tao An Key Laboratory of Radio Astronomy Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China University of Chinese Academy of Sciences Beijing 100049China

Line surveys of complex molecules with millimeter and sub-millimeter telescopes are important for probing the physical and chemical environments of massive star forming regions(MSFRs).We present a molecular line survey with the Submillimeter Array(SMA) in the frequency ranges of 220.3–222.3 GHz and 230.3–232.3 GHz toward G10.6-0.4, the brightest star forming core in the W31 complex. Ninety-nine transitions from 22 molecular species and their isotopologues are identified. The moment 0 images of typical molecules show a compact core which is concentrated at the continuum peak position. Based on the local thermodynamic equilibrium assumption, the molecular line data are modeled. The rotational temperatures of those molecular species range from 96 to 178 K and their column densities range from 2.0×1014to 3.7×1017cm-2. The observational data suggest that all complex molecules are located in a warm environment. Chemical environments of the molecules are discussed. We compared molecular abundances and gas temperatures in G10.6-0.4 with those in other MSFRs, and found that gas temperatures and fractional abundances of specific molecules in G10.6-0.4 are similar to the typical MSFR W51 North, suggesting that there are similar physical and chemical environments in these two MSFRs.

关键词： stars: formation ISM: abundances ISM: individual objects: G10.6-0.4 ISM: molecules radio lines: ISM

Virtual colonoscopy-induced perforation in a patient with Crohn's disease

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World Journal of Gastroenterology 2007年第6期13卷 978-979页

作者： Sunny H wong Vincent WS wong Joseph JY Sung Institute of Digestive Disease and Department of Medicine and Therapeutics The Chinese University of Hong Kong Hong Kong China

We report a case of sigmoid colon perforation in a patient with Crohn's disease undergoing computed-tomographic (CT) colonography. A 70-year-old patient with Crohn's disease with terminal ileitis and sigmoid stricture underwent CT colonography after incomplete conventional colonoscopy. During the procedure, the colon was inflated by air insufflation and the patient developed abdominal pain with radiological evidence of retroperitoneal and intraperitoneal free gas. Hartmann's operation was performed. This case highlights that CT colonography is not risk-free. The risk of perforation may be higher in patients with inflammatory bowel disease.

关键词： Perforation Colonography Crohn's disease Stricture Hartmann's Inflammatory bowel disease