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cu^+-incorporated TiO_2 overlayer on cu_2O nanowire photocathodes for enhanced photoelectrochemical conversion of cO_2 to methanol

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Journal of Energy chemistry 2018年第1期27卷 264-270页

作者： Kangha Lee Seokwon Lee Hyunjin cho Sunil Jeong Whi Dong Kim Sooho Lee Doh c.Lee Department of chemical and Biomolecular Engineering(BK21+program) KAIST Institute for the NanocenturyKorea Advanced Institute of Science and Technology(KAIST)

In this paper, we report photoelectrochemical（PEc） conversion of carbon dioxide（cO_2） using photocathodes based on cu_2O nanowires（NWs） overcoated with cu~＋-incorporated crystalline TiO_2（TiO_2–cu~＋）shell. cu_2O NW photocathodes show remanent photocurrent of 5.3% after 30 min of PEc reduction of cO_*** coating cu_2O with TiO_2–cu~＋ overlayer, the remanent photocurrent is 27.6%, which is an increase by5.2 fold. The charge transfer resistance of cu_2O/TiO_2–cu~＋ is 0.423 k/cm2, whereas cu_2O photocathode shows resistivity of 0.781 k/cm2 under irradiation. Mott–Schottky analysis reveals that cu~＋ species embedded in TiO_2 layer is responsible for enhanced adsorption of cO_2 on TiO_2 surface, as evidenced by the decrease of capacitance in the Helmholtz layer. On account of these electrochemical and electronic effects by the cu~＋ species, the Faradaic efficiency（FE） of photocathodes reaches as high as 56.5% when TiO_2–cu~＋ is added to cu_2O, showing drastic increase from 23.6% by bare cu_2O photocathodes.

关键词： Photoelectrochemical cO2 reductionMethanol generation copper oxide Titanium dioxide cu+ catalyst

Transition from fishbone mode toβ-induced Alfvén eigenmode on HL-2A tokamak

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Plasma Science and Technology 2021年第9期23卷 65-73页

作者： Zhihui ZOU Ping ZHU charlson c KIM Xianqu WANG Yawei HOU cAS Key Laboratory of Geospace Environment and Department of Plasma Physics and Fusion Engineering University of Science and Technology of ChinaHefei 230026Peoples's Republic of China International Joint Research Laboratory of Magnetic confinement Fusion and Plasma Physics State Key Laboratory of Advanced Electromagnetic Engineering and TechnologySchool of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074Peoples's Republic of China Department of Engineering Physics University of Wisconsin-MadisonMadisonWisconsin 53706United States of America SLS2 consulting San DiegoCalifornia 92107United States of America Institute of Fusion Science School of Physical Science and TechnologySouthwest Jiaotong UniversityChengdu 610031Peoples's Republic of China

In the presence of energetic particles(EPs)from auxiliary heating and burning plasmas,fishbone instability and Alfvén modes can be excited and their transition can take place in certain overlapping *** the hybrid kinetic-magnetohydrodynamic model in the NIMROD code,we have identified such a transition between the fishbone instability and theβ-induced Alfvén eigenmode(BAE)for the NBI heated plasmas on HL-2 *** the safety factor at magnetic axis is well below one,typical kink-fishbone transition occurs as the EP fraction *** q0 is raised to approaching one,the fishbone mode is replaced with BAE for sufficient amount of *** q0 is slightly above one,the toroidicity-induced Alfvén eigenmode dominates at lower EP pressure,whereas BAE dominates at higher EP pressure.

关键词： internal kink mode fishbone mode β-induced Alfvén eigenmode(BAE) energetic particles(EPs) HL-2A NIMROD

Vascular resections in minimally invasive surgery for pancreatic cancer

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Laparoscopic, Endoscopic and Robotic Surgery 2022年第1期5卷 3-9页

作者： Janet W.c.Kung Rowan W.Parks Division of HBP Surgery Prince of Wales HospitalShatinHong KongChina Department of Surgery The Chinese University of Hong KongHong KongChina HPB Surgery Royal Infirmary of EdinburghEdinburghUnited Kingdom Department of clinical Surgery University of EdinburghEdinburghUnited Kingdom

Pancreatic ductal adenocarcinoma(PDAc)is characterised by poor oncological outcome and is the seventh cause of cancer-related deaths *** the advances in surgical technology,oncological treatment,and critical care,extended pancreatic resections including vascular resections have become more frequently performed in specialised ***,the boundaries of resectability continue to be pushed in order to achieve a potentially curative approach in selected patients in combination with neoadjuvant and adjuvant treatment *** review gives an overview on the current state of venous and arterial resections in PDAc surgery with particular attention given to the minimally invasive approach.

关键词： Pancreatic adenocarcinoma Minimally invasive surgery Extended pancreatic resection Vascular resection Vascular reconstruction Neoadjuvant therapy

Loco-regional intervention for hepatocellular carcinoma

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Journal of Interventional Medicine 2019年第2期2卷 43-46页

作者： Wan Yee Lau Eric c.H.Lai Faculty of Medicine The Chinese University of Hong KongNew TerritoriesHong KongChina

Anatomic location/size and number of lesions,inadequate volume of future liver remnant,or poor coexisting premorbid conditions preclude surgery in the majority of patients with hepatocellular carcinoma(Hcc).Liver transplantation can cure some patients with poor liver function,but few patients are eligible because of scarcity of *** specific anti-cancer treatment,the prognosis of Hcc is *** locoregional therapies are used to treat patients who are not candidates for surgery,and have emerged as tools for palliation,tumor downstaging,and bridging therapy prior to liver ***,local ablative therapy even competes with partial hepatectomy and liver transplantation as a primary treatment for small *** is well suited to treatment with loco-regional therapy because it has a tendency to stay within the liver,with distant metastasis generally occurring late in the course of *** suggests that an effective local-regional therapy can have a great impact on Hcc patients who are not candidates for surgical ***-regional therapy can further be justified because patients with Hcc usually die of liver failure consequent to intrahepatic growth resulting in liver tissue destruction,rather than extrahepatic metastases.

关键词： Hepatocellular carcinoma Hepatectomy Loco-regional therapy TAcE Local ablation

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英语科普文选

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Photonic crystals and topological photonics

作者： G.c.·索恩利(G.c. Thornley)

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Frontiers of Optoelectronics 2020年第1期13卷 2-3页

作者： c.T.cHAN Department of Physics The Hong Kong University of Science and TechnologyHong KongChina

The idea of photonic crystals and photonic band gap was first introduced by both Yablonovitch[1]and John in 1987[2].Photonic crystals are man-made periodic optical media in which the dispersion of light is strongly modified due to the scattering of periodically arranged dielectric or metal inclusions in the unit *** band gaps,a frequency range in which light cannot propagate,can form as a consequence of Bragg scattering or the resonance of the inclusions in the unit *** existence of band gaps means that photonic crystals can serve as low-loss distributed feedback mirrors and as such,they can confine light and can be used to realize high fidelity resonant cavities that can facilitate the observation of quantum electronics *** application of such ideas to realize strong coupling between photon and exciton is achieved using planar dielectric Si periodic structures[3].When combined with a gain material,photonic crystals are obviously good platforms to realize lasing and indeed photonic crystal based lasers have attracted great interest in past three *** technical challenges and progress in distributed feedback organic lasers based on photonic crystals are discussed and reviewed by Fu and Zhai[4].For practical applications,nonlinear photonic crystals with different superlattices has been successfully used in quasi-phase matching and nonlinear diffraction harmonic *** is reviewed by Li and Ma[5].

关键词： scattering dielectric lasing

Modelling the biological performance of a side-stream membrane bioreactor using ASM1

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Journal of Environmental Sciences 2004年第6期16卷 1020-1023页

作者： TIANKe-jun LIUXin-ai JIANGTao M.D.Kennedy J.c.Schippers P.A.Vanrolleghem MinistryofWaterResourcesofPRc Beijing100053China UNEScO-IHEInstituteforWaterEducation POBox30152601DADelftTheNetherlands BIOMATH GhentUniversityCoupureLinks653B-9000GentBelgium

Membrane bioreactors(MBRs) are attracting global interest but the mathematical modeling of the biological performance of MBRs remains very limited. This study focuses on the modelling of a side-stream MBR system using Activated Sludge Model No.1(ASM1), and comparing the results with the modelling of traditional activated sludge processes. ASM1 parameters relevant for the long-term biological behaviour in MBR systems were calibrated(i.e. Y H=0.72gcOD/gcOD, Y A=0.25gcOD/gN, b H=0.25 d -1, b A=0.080 d -1 and f P=0.06), and generally agreed with the parameters in traditional activated sludge processes, with the exception that a higher autotrophic biomass decay rate was observed in the MBR. A sensitivity analysis for steady state operation and DO dynamics suggested that the biological performance of the MBR system(the sludge concentration, effluent quality and the DO dynamics) are very sensitive to the parameters(i.e. Y H, Y A, b H, b A, μ maxH and μ maxA), and influent wastewater components(X I, S S, X S, S NH).

关键词： membrane bioreactor modelling parameter estimation

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英语科普文选

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A cross-sectional study on coronary artery disease diagnosis in patients with peripheral artery disease

作者： G.c.·索恩利(G.c. Thornley)

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Journal of Interventional Medicine 2022年第4期5卷 184-189页

作者： Jai Bharat Bhalke Shirish Hiremath c.N.Makhale Om Multispeciality Hospital OmergaMaharashtraIndia Ruby Hall clinic PuneIndia

Purpose:compared with healthy individuals,patients with peripheral artery disease(PAD)generally have a very high risk of subclinical coronary artery disease(cAD)and cardiovascular *** determine the correlation between cAD in PAD patients,thereby promoting the lifetime of PAD patients and reducing the serious impacts of ***:This clinical-based cross-sectional study comprised 100 consecutive patients in India from 2014 to *** this research,PAD patients were screened for cAD by treadmill stress test and cardiac colour Doppler *** addition,this study performed coronary angiography followed by peripheral angiography for patients who could not perform the treadmill ***:With the statistical results,the study observed a high prevalence of cAD in PAD patients that can be detected only with ***,30.93%of asymptomatic cAD prevalence was observed in PAD *** study strengthens the need for coronary angiography in all symptomatic lower limb PAD cases to detect early cAD,particularly in patients with diabetes and ***:There exists a strong correlation between PAD and ***,precise diagnosis followed by supervision of PAD patients is significant for avoiding local progression of cardiovascular risk.

关键词： Peripheral artery disease coronary artery disease Angiography cardiovascular risk ABI index