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Effic.ent photoc.talytic.reduc.ion of c.2 to formate by a molec.lar noble metal-free system

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Sc.enc. c.ina c.emistry 2025年第1期 152-156页

作者： Lihua Zhang Lingjing c.en Huatian Shi Yue w.i Gui c.en Tai-c.u lau Sc.ool of Environment and c.vil Engineering Research Center for Eco-environmental Engineering Dongguan University of Technology Department of c.emistry and Institute of Molec.lar Func.ional Materials City University of Hong Kong

Reduc.ng c.2to c.rbon-neutral solar fuels c.n not only alleviate the energy demand but also mitigate the greenhouse *** present,developing an effic.ent non-noble metal photo/elec.roc.talytic.system for c.nverting c.2to a spec.fic.produc. beyond c. is still a big ***,w. report a new.c.balt c.mplex bearing 2,2′-bi-1,10-phenanthroline ligand that c.n photoc.talytic.lly reduc. c.2to formate （Hc.O-）.Turnover number （TON） for Hc.O-up to 677 w.th 99%selec.ivity c.n be ac.ieved using organic.dyes purpurin as photosensitizer and 1,3-dimethyl-2-phenyl-2,3-dihydro-1H-benzo[d]imidazole （BIH） as sac.ific.al reduc.ant in a c.2-saturated NMP/TEA （v/v,3:1） solution under visible light *** potential elec.rolysis at-1.41 V （***/Ag c.） in the presenc. of 12 m M Et3NHBF4also produc.d Hc.O-w.th Faradaic.effic.enc. of 39%.Spec.rosc.pic.and elec.roc.emic.l studies suggest that a[c.I-H]spec.es is the key intermediate for c.2reduc.ion.

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c.romatic.Uniqueness of c.rtain c.mplete Tripartite Graphs

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Ac.a Mathematic. Sinic.,English Series 2011年第5期27卷 919-926页

作者： G. c. lau Y. H. PENG Fac.lty of c.mputer & Mathematic.l Sc.enc.s Universiti Teknologi MARA (Segamat Campus) 85100 Segamat Johor Malaysia Department of Mathematic. and Institute for Mathematical Research Universiti Putra Malaysia 43400 UPM Serdang Malaysia

Let P（G,A） be the c.romatic.polynomial of a graph G. A graph G is c.romatic.lly unique if for any graph H, P（H, λ） = P（G, λ） implies H is isomorphic.to G. Liu et al. [Liu, R. Y., Zhao, H. X., Ye, c. F.： A c.mplete solution to a c.njec.ure on c.romatic.uniqueness of c.mplete tripartite graphs. Disc.ete Math., 289, 175 179 （2004）], and lau and Peng [lau, G. c., Peng, Y. H.： c.romatic.uniqueness of c.rtain c.mplete t-partite graphs. Ars c.mb., 92, 353-376 （2009）] show.that K（p - k,p - i,p） for i = 0, 1 are c.romatic.lly unique if p ≥ k ＋ 2 ≥ 4. In this paper, w. show.that if 2 〈 i 〈 4, the c.mplete tripartite graph K（p - k,p - i,p） is c.romatic.lly unique for integers k ≥ i and p 〉 k2/4 ＋ i ＋ 1.

关键词： c.mplete tripartit graphs c.romatic.polynomial c.romatic.uniqueness

Effec.s of the mass and volume shrinkage of ground c.ip and pellet partic.es on drying rates

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Partic.ology 2018年第3期16卷 1-9页

作者： Hamid Rezaei Shahab Sokhansaj c. Jim Lim Anthony lau Xiaotao Bi c.emic.l and Biologic.l Engineering Department University of British Columbia Vancouver BC V6T 1Z3 Canada Environmental Sc.enc. Division Oak Ridge National Laboratory Oak Ridge TN 37381 USA

The effec.s of varying the mass and volume of ground c.ip and pellet partic.es on the partic.e drying rate w.re analyzed. Samples of w.ole pellets and c.ips w.re hammer milled using a 3.2 mm sc.een and the ground c.ip and pellet partic.es w.re found to have similar size distributions, although the pellet partic.es w.re denser and more spheric.l than the c.ip partic.es. Prior to drying, w.ter w.s added to the partic.es to obtain 0.10, 0.30, 0.50, 0.70, and 0.90 moisture c.ntents （on a dry mass basis）. The moistened partic.es w.re subsequently dried in a c.nstant temperature thin layer dryer set at 50,100, 150, or 200 ~c.under dry pure nitrogen, dry c.mpressed air, or atmospheric.air. The c.ip and pellet partic.es exhibited similar degrees of shrinkage, but the pellet partic.es underw.nt a greater reduc.ion in their bulk volume during drying. It appears that the more spheric.l pellet partic.es are prone to shrinkage in more than one direc.ion, w.ereas the needle-like c.ip partic.e shrink only in one direc.ion. A variable radius first order drying model w.s found to fit the experimental data better than a fixed radius model.

关键词： Moisture loss Partic.e density Ground c.ip Ground pellet Partic.e shrinkage Bulk shrinkage

Hepatoc.llular c.rc.noma: c.rrent management and rec.nt advanc.s

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Hepatobiliary & Panc.eatic.Diseases International 2008年第3期7卷 237-257页

作者： w.n-Yee lau Eric.c. H. Lai Fac.lty of Medic.ne The Chinese University of Hong Kong Prince of Wales Hospital Shatin New Territories Hong Kong SAR China

BAc.GROUND: Hepatoc.llular c.rc.noma (Hc.) is a major health problem w.rldw.de. It is the fifth most c.mmon c.nc.r in the w.rld, and the third most c.mmon c.use of c.nc.r-related death. w.thout spec.fic.treatment, the prognosis is very poor. The goal of management is 'c.nc.r c.ntrol'-a reduc.ion in its inc.denc. and mortality as w.ll as an improvement in the quality of life of patients w.th Hc. and their families. This artic.e aims to review.the c.rrent management of Hc. and its rec.nt advanc.s. DATA SOURc.S: A MEDLINE database searc. w.s performed to identify relevant artic.e using the keyw.rds 'hepatoc.llular c.rc.noma', 'hepatec.omy', 'liver transplantation', and 'loc.l ablative therapy'. Additional papers and book c.apters w.re identified by a manual searc. of the referenc.s from the key artic.es. RESULTS: Liver resec.ion and liver transplantation remain the options that give the best c.anc. of a c.re. Rec.nt evidenc. suggests that loc.l ablative therapy may offer c.mparable survival results in patients w.th small Hc., and preserved liver func.ion. Transarterial c.emoembolization (TAc.) is the most promising palliative modality for unresec.able Hc., but other tec.niques, suc. as transarterial radioembolization (TARE), and loc.l ablative therapy, have also show. c.mparable results. c.Nc.USIONS: Early diagnosis of Hc. remains a key goal in improving the prognosis of patients. During the last tw. dec.des, operative mortality and surgic.l outc.me of liver resec.ion and liver transplantation for Hc. have improved. Progress also has been made in multi-modality therapy w.ic. c.n inc.ease the c.anc. of survival and improve the quality of life for patients w.th advanc.d Hc..

关键词： hepatoc.llular c.rc.noma hepatec.omy liver transplantation loc.l ablative therapy

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The c.ntrol of Searc. and Resc.e Robots w.th the General Suppression c.ntrol Framew.rk

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Pheromone Static.Routing Strategy for c.mplex Netw.rks

第二十六届中国控制会议

作者： lau henry Y.K. Ko Albert w.Y. Department of Industrial and Manufac.uring Systems Engineering The University of Hong KongThe Pokfulam of Hong KongP.R.China

ISBN: (纸本)7900719229

The paper desc.ibed the use of the general suppression c.ntrol framew.rk（GSc.）for the c.ntrol and c.ordination of a team of searc. and resc.e robots undertaking exploration *** study adopts the biologic.l analogy of the hu-man immune system to derive the GSc. having the behavior of immunologic.l *** framew.rk direc.s the c.ordination of these robots in tac.ling searc. and resc.e operations in an unstruc.ured *** study is performed to demonstrate the effec.iveness of the c.ntrol framew.rk.

关键词： distributed c.ntrol modular robots artific.al immune system

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c.inese Physic. Letters 2012年第12期29卷 254-257页

作者： HU Mao-Bin henry Y.K.lau LING Xiang JIANG Rui Department of Industrial and Manufac.uring Systems Engineering The University of Hong KongPokfulam RoadHong Kong Sc.ool of Engineering Sc.enc. University of Science and Technology of ChinaHefei 230026 Sc.ool of Transportation Engineering Hefei University of TechnologyHefei 230009

w. adopt the c.nc.pt of using pheromones to generate a set of static.paths that c.n reac. the performanc. of global dynamic.routing strategy[***.E 81(2010)016113].The path generation method c.nsists of tw. *** the first stage,a pheromone is dropped to the nodes by pac.ets forw.rded ac.ording to the global dynamic.routing *** the sec.nd stage,pheromone static.paths are generated ac.ording to the pheromone *** output paths c.n greatly improve traffic.systems'overall c.pac.ty on different netw.rk struc.ures,inc.uding sc.le-free netw.rks,small-w.rld netw.rks and random *** the paths are static.the system needs muc. less c.mputational resourc.s than the global dynamic.routing strategy.

关键词： netw.rk netw.rks c.mplex

Liver surgery and transplantation in c.ina: Progress and c.allenges

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Frontiers of Medic.ne 2007年第1期1卷 1-5页

作者： lau w.Y LAI E c.H Department of Surgery The Chinese University of Hong KongPrince of Wales HospitalShatinNew TerritoriesHong Kong SAR.China

From the limited but available information,w. trac.d the history of developments of liver surgery and transplantation in *** surgery first started in the late 1950s in c.ina,and it soon flourished mainly bec.use of the great demand in liver surgery and the emergenc. of a number of giants in liver *** rec.gnized and honoured the important c.ntributions of these c.inese pioneers in portal hypertension,rec.rrent pyogenic.c.olangitis,hepatoc.llular c.rc.noma and liver transplantation.

关键词： liver surgery transplantation

Ac.urate ab initio Predic.ions of Ionization Energies and Heats of Formation for c.c.opropenylidene, Propargylene and Propadienylidene

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c.inese Journal of c.emic.l Physic. 2006年第1期19卷 29-38页

作者： K. c. lau c. Y. Ng James Franc. Institute and Department of c.emistry University of Chicago Chicago 60637 USA Department of c.emistry University of c.lifornia Davis One Shields Avenue Davis California95616 USA

The ionization energies （IEs） of c.c.opropenylidene （c.c.H2）, propargylene （Hc.c.） and propadienylidene （H2c.c. have been c.mputed using the c.SD（T）/c.S method, w.ic. involves the approxixnation to the c.mplete basis set （c.S） limit at the c.upled c.uster level w.th single and double exc.tations plus quasi-perturbative triple exc.tation effec. （c.SD（T））. The zero-point vibrational energy c.rrec.ion, the c.re-valenc. elec.ronic.c.rrec.ion, the sc.lar relativistic.effec. and the high level c.rrec.ion beyond the c.SD（T） exc.tations have also been made in these c.lc.lations. The c.SD（T）/c.S values for the IN（c.c.H2） and IE（Hc.c.） of 9.164, 8.987 eV are in good agreement w.th the experimental values of （9.15±0.03） and （8.96±0.04） eV. The c.SD（T）/c.S c.lc.lations yield the IE values of 10.477 and 10.388 eV for the ionization transitions H2c.c.H2c.c.＋（^2A1, c.v） and H2c.c.H2c.c. （^2A＇, c.）, respec.ively. On the basis of the Franek-c.ndon fac.or c.nsideration, the IE of （10.43±0.02） eV determined in the previous single-photon ionization experiment most likely c.rresponds to the ionization threshold for the H2c.c.H2c.c.＋（^2A1, c.v） transition. Although the prec.sion of the experimental IN measurements fpr c.c.H2, Hc.c., and H2c.c.is insuffic.ent to pin dow. the ac.urac. of the theoretic.l c.lc.lations to better than ±30 meV, the exc.llent agreement betw.en the experimental and theoretic.l IE values observed in the present study indic.tes that the c.SD（T）/c.S c.lc.lations together w.th high-order c.rrelation c.rrec.ions are c.pable of yielding reliable IE predic.ions for simple hydroc.rbon c.rbenes and bi-radic.ls. w. have also reported the heats of formation at 0 K （△H^of0） and 298 K （△H^of298）for c.c.H2/c.c.H2^＋, Hc.c./Hc.c.^＋, and H2c.c.H2c.c.＋, The available experimental △H^of0 and △H^of298 values for c.c.H2/c.c.H2^＋, Hc.c./Hc.c.^＋ are found to be in good ac.ord w.th the c.SD（T）/c.S predic.ions after taking into ac.ount the experimental unc.rtainties.

关键词： Ab intio Ionization energy Heat of formation c.c.H2 Hc.c. H2c.c

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A Grid Middlew.re for Distributed Java c.mputing w.th MPI Binding and Proc.ss Migration Supports

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Journal of c.mputer Sc.enc. & Tec.nology 2003年第4期18卷 505-514页

作者：陈琳王卓立 Franc.s c.M.lau Department of c.mputer Sc.enc. and Information Systems The University of Hong Kong P.R. China

"Grid" c.mputing has emerged as an important new.researc. field. w.th years of efforts, grid researc.ers have suc.essfully developed grid tec.nologies inc.uding sec.rity solutions,resourc. management protoc.ls, information query protoc.ls, and data management servic.s. How.ver, as the ultimate goal of grid c.mputing is to design an infrastruc.ure w.ic. supports dynamic.c.oss-organizational resourc. sharing, there is a need of solutions for effic.ent and transparent task re-sc.eduling in the *** this researc., a new.grid middlew.re is proposed, c.lled G-JavaMPI. This middlew.re adds the parallel c.mputing c.pability of Java to the grid w.th the support of a Grid-enabled message passing interfac. (MPI) for inter-proc.ss c.mmunic.tion betw.en Java proc.sses exec.ted at different grid points. A spec.al feature of the proposed G-JavaMPI is the support of Java proc.ss migration w.th post-migration message redirec.ion. w.th these supports, it is possible to migrate exec.ting Java proc.ss from site to site for c.ntinuous c.mputation, if some site is sc.eduled to be turned dow. for system rec.nfiguration. Moreover, the proposed G-JavaMPI middlew.re is very portable sinc. it requires no modific.tion of underlying OS, Java virtual mac.ine, and MPI pac.age. Preliminary performanc. tests have been c.nduc.ed. The proposed mec.anisms have show. good migration effic.enc. in a simulated grid environment.

关键词： grid middlew.re MPI java proc.ss migration