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On the Variability and correlation of surface Ozone and carbon Monoxide Observed in Hong Kong Using Trajectory and Regression Analyses

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Advances in Atmospheric sciences 2004年第1期21卷 141-152页

作者：王体健 K.s.LAM c.w.TsANG s.c.KOT Department of Atmospheric sciences Nanjing University Nanjing 210093 Environmental Engineering Unit Department of Civil & Structural Engineering The Hong Kong Polytechnic University Hong Kong Environmental Engineering Unit Department of Civil & Structural Engineering The Hong Kong Polytechnic University Hong Kong Department of Mechanical Engineering Hong Kong University of Science & Technology Hong Kong

This paper investigates, the variability and correlation of surface ozone (Os) and carbon monoxide (cO) observed at cape D'Aguilar in Hong Kong from 1 January 1994 to 31 December 1995. statistical analysis shows that the average O3 and cO mixing ratios during the two years are 32±17ppbv and 305±191 ppbv, respectively. The O3/cO ratio ranges from 0.05 to 0.6 ppbv/ppbv with its frequency peaking at 0.15. The raw dataset is divided into six groups using backward trajectory and cluster analyses. For data assigned to the same trajectory type, three groups are further sorted out based on cO and NOX mixing ratios. The correlation coefficients and slopes of O3/cO for the 18 groups are calculated using linear regression analysis. Finally, five kinds of air masses.w.th different chemical features are identified: continental background (cB), marine background (MB), regional polluted continental (RPc), perturbed marine (P*M), and local polluted (LP) air masses. Further studies indicate that O3 and cO in the continental and marine background air masses (cB and MB) are positively correlated for the reason that they are well mixed over the long range transport before arriving at the site. The negative correlation between O3 and cO in air mass LP is believed to be associated with heavy anthropogenic influence, which results from the enhancement by local sources as indicated by high cO and NOx and depletion of O3 when mixed with fresh emissions. The positive correlation in the perturbed marine air mass P*M favors the low photochemical production of O3. The negative correlation found in the regional polluted continental air mass RPc is different from the observations at Oki Island in Japan due to the more complex O3 chemistry at cape D'Aguilar.

关键词： ozone carbon monoxide trajectory

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Integrated waste and water management in mining and metallurgical industries

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中国有色金属学会会刊：英文版 2008年第6期18卷 1497-1505页

作者： B.K.c.cHAN s.BOUZALAKOs A.w.L.DUDENEY Department of Earth science and Engineering Imperial College centre for Innovation in carbon capture and storage(cIccs) University of Nottingham

引得出的操作通常共同生产不能出售的材料(矿物质浪费) 的大数量。增强的费用和世界范围的规定为如此的浪费的减小和复用加亮增加的需要。现在的纸为固体和水介绍一个新综合浪费管理计划。计划被连接到硫醚筹款集中的金属处理的 biohydr... 详细信息

引得出的操作通常共同生产不能出售的材料(矿物质浪费) 的大数量。增强的费用和世界范围的规定为如此的浪费的减小和复用加亮增加的需要。现在的纸为固体和水介绍一个新综合浪费管理计划。计划被连接到硫醚筹款集中的金属处理的 biohydrometallurgical 的合成废物和过程水的新奇处理例示。硫醚的 Bioleaching 专注导致稳固的废物的二种类型：ferrihydrite/gypsum 从 bioleach 白酒和未沥滤的脉石的中立状态猛抛。纸显示那，依赖部件包含了的未成年者，在混合的稳固的阶段可能有用地在产品的三种类型之中被散布：常规地下的装填， cemented 土木工程装填(特别地控制的低力量材料或 cLsM ) 和生产土壤。包含模仿的矿物质废物强调 cLsM，证明如此的材料能展出力量，孔和渗透的要求的特征。什么时候有毒的部件，例如，从倔强的金矿石的砷，是在场的，封装将被要求。过程水典型地被再循环远及可能，尽管任何过量以前应该被对待，再使用或排出。纸也由反向的渗透(能通常移开溶解部件的很少方法之一) 加亮处理，特别地在氧化状态 +6 显示出那砷能乐意地为分泌物被移开(<

关键词：置换沉淀废物处理生物浸取金矿

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AR-assisted robot welding programming

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Advances in Manufacturing 2020年第1期8卷 40-48页

作者： s.K.Ong A.Y.c.Nee A.w.w.Yew N.K.Thanigaivel Department of Mechanical Engineering Faculty of EngineeringNational University of SingaporeSingapore

Robotic welding demands high accuracy and ***,robot programming is often a tedious and time-consuming process that requires expert *** paper presents an augmented reality assisted robot welding task programming(ARwP)system using a user-friendly augmented reality(AR)interface that simplifies and speeds up the programming of robotic welding *** ARwP system makes the programming of robot welding tasks more user-friendly and reduces the need for trained programmers and expertise in specific robotic *** AR interface simplifies the definition of a welding path as.w.ll as the welding gun orientation,and the system;the system can locate the welding seam of a workpiece quickly and generate a viable welding path based on the user *** developed system is integrated with the touch-sensing capability of welding robots in order to locate the welding path accurately based on the user input,for fillet *** system is applicable to other welding processes and methods of seam *** system implementation is described and evaluated with a case study.

关键词： Augmented reality(AR) Robot programming welding seam tracking

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A Discrete Flux scheme for Aerodynamic and Hydrodynamic Flows

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communications in computational Physics 2011年第5期9卷 1257-1283页

作者： s.c.Fu R.M.c.so w.w.F.Leung Mechanical Engineering Department Hong Kong Polytechnic UniversityHung HomKowloonHong Kong school of Mechanical Engineering Purdue UniversityWest LafayetteIN 47907-2088USA Research Institute of Innovative Products&Technologies Hong Kong Polytechnic UniversityHung HomKowloonHong Kong

The objective of this paper is to seek an alternative to the numerical simulation of the Navier-stokes equations by a method similar to solving the BGK-type modeled lattice Boltzmann *** proposed method is valid for both gas and liquid flows.A discrete flux scheme(DFs)is used to derive the governing equations for two distribution functions;one for mass and another for thermal *** equations are derived by considering an infinitesimally small control volume with a velocity lattice representation for the distribution *** zero-order moment equation of the mass distribution function is used to recover the continuity equation,while the first-order moment equation recovers the linear momentum *** recovered equations are correct to the first order of the Knudsen number(Kn);thus,satisfying the continuum ***,the zero-order moment equation of the thermal energy distribution function is used to recover the thermal energy *** aerodynamic flows,it is shown that the finite difference solution of the DFs is equivalent to solving the lattice Boltzmann equation(LBE)with a BGK-type model and a specified equation of *** formulated,the DFs can be used to simulate a variety of aerodynamic and hydrodynamic *** of classical aeroacoustics,compressible flow with shocks,incompressible isothermal and non-isothermal couette flows,stratified flow in a cavity,and double diffusive flow inside a rectangle are used to demonstrate the validity and extent of the *** good to excellent agreement with known analytical and/or numerical solutions is obtained;thus lending evidence to the DFs approach as an alternative to solving the Navier-stokes equations for fluid flow simulations.

关键词： Aerodynamics hydrodynamics lattice Boltzmann equation

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conformable fractional heat equation with fractional translation symmetry in both time and space

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chinese Physics B 2023年第4期32卷 125-129页

作者： w s chung A Gungor J Krız B c Lutfuoglu H Hassanabadi Department of Physics and Research Institute of Natural science College of Natural ScienceGyeongsang National UniversityJinju 660-701Korea Mechanical Engineering Akdeniz UniversityAntalyaTurkey Department of Physics University of Hradec KraloveRokitanskeho 6250003 Hradec KraloveCzech Republic Department of Physics Akdeniz UniversityAntalyaTurkey Faculty of Physics Shahrood University of TechnologyShahroodIran

we investigate the fractional heat equation with fractional translation in both time and position with different fractional *** examples.w. consider a rod and anα-disk with an initial constant temperature and discuss... 详细信息

关键词： fractional derivative heat equation conformable symmetry

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A Lattice Boltzmann and Immersed Boundary scheme for Model Blood Flow in constricted Pipes:Part 1-steady Flow

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communications in computational Physics 2013年第6期14卷 126-152页

作者： s.c.Fu w.w.F.Leung R.M.c.so Department of Mechanical Engineering The Hong Kong Polytechnic UniversityHung HomHong Kong

Hemodynamics is a complex problem with several distinct characteristics;fluid is non-Newtonian,flow is pulsatile in nature,flow is three-dimensional due to cholesterol/plague built up,and blood vessel wall is *** order to simulate this type of flows accurately,any proposed numerical scheme has to be able to replicate these characteristics correctly,efficiently,as.w.ll as individually and *** the equations of the finite difference lattice Boltzmann method(FDLBM)are hyperbolic,and can be solved using cartesian grids locally,explicitly and efficiently on parallel computers,a program of study to develop a viable FDLBM numerical scheme that can mimic these characteristics individually in any model blood flow problem was *** present objective is to first develop a steady FDLBM with an immersed boundary(IB)method to model blood flow in stenoic artery over a range of Reynolds *** resulting equations in the FDLBM/IB numerical scheme can still be solved using cartesian grids;thus,changing complex artery geometry can be treated without resorting to grid *** FDLBM/IB numerical scheme is validated against known data and is then used to study Newtonian and non-Newtonian fluid flow through constricted *** investigation aims to gain insight into the constricted flow behavior and the non-Newtonian fluid effect on this behavior.

关键词： Finite difference method lattice Boltzmann method immersed boundary method blood flow constricted pipe

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Interface dominated deformation transition from inhomogeneous to apparent homogeneous mode in amorphous/amorphous nanolaminates

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Journal of Materials science & Technology 2022年第4期99卷 178-183页

作者： Z.Q.chen M.c.Li J.s.cao F.c.Li s.w.Guo B.A.sun H.B.Ke w.H.wang songshan Lake Materials Laboratory Dongguan 523808PR China Institute of Physics Chinese Academy of SciencesBeijing 100190PR China Institute of Materials Engineering Nanjing UniversityNantong 226019PR China school of Physics science and Technology Xinjiang UniversityXinjiang 830046PR China school of Physical sciences University of Chinese Academy of SciencesBeijing 100049PR China state Key Laboratory for Mechanical Behavior of Material Xi'an Jiaotong UniversityXi’an 710049PR China

The amorphous/amorphous nanolaminates(A/ANLs)have aroused great attentions owing to their tunable structure and enhanced mechanical ***,the plastic deformation mechanism of A/ANLs have yet been ***,we systematically examined the mechanical properties and deformation behavior of series of NiNb/ZrcuNi Al A/ANLs via nanoindentaion *** was found that both the amount and morphology of amorphous/amorphous interface(A/AIs)played crucial roles in the plastic deformation of A/*** and straighter A/AIs facilitated multiple shear banding deformation,of which the hardness increased with decreasing layer thickness,as the A/AIs hindered the propagation of shear bands(sBs).whilst,more and wavier A/AIs promoted homogeneous deformation,of which the hardness stayed at a much lower value and was relatively irrelevant with the layer thickness,for the promoted activation of shear transformation zones by A/*** results provide guidance for modifying the mechanical properties of amorphous alloys.w.th interface engineering design.

关键词： Amorphous alloys Nanolaminates shear bands Hardness Interface

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Adaptive Fault Detection Based on Neural Networks and Multiple sampling Points for Distribution Networks and Microgrids

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Journal of Modern Power systems and clean Energy 2022年第6期10卷 1648-1657页

作者： J.Marín-Quintero c.Orozco-Henao A.s.Bretas J.c.Velez A.Herrada A.Barranco-carlos.w.s.Percybrooks Electric and Electronic Engineering Program Universidad Tecnológica de BolívarCartagenaColombia Electrical and Electronic Engineering Department Universidad del NorteBarranquillaColombia Distributed systems Group Pacific Northwest National LaboratoryGainesvilleUSA

smart networks such as active distribution network(ADN)and microgrid(MG)play an important role in power system *** design and implementation of appropriate protection systems for MG and ADN must be addressed,which imposes new technical *** paper presents the implementation and validation aspects of an adaptive fault detection strategy based on neural networks(NNs)and multiple sampling points for ADN and *** solution is implemented on an edge *** are used to derive a data-driven model that uses only local measurements to detect fault states of the network without the need for communication *** sampling points are used to derive a data-driven model,which allows the generalization considering the implementation in physical *** adaptive fault detector model is implemented on a Jetson Nano system,which is a single-board computer(sBc)with a small graphic processing unit(GPU)intended to run machine learning loads at the *** proposed method is tested in a physical,real-life,low-voltage network located at Universidad del Norte,*** testing network is based on the IEEE 13-node test feeder scaled down to 220 *** validation in a simulation environment shows the accuracy and dependability above 99.6%,while the real-time tests show the accuracy and dependability of 95.5%and 100%,*** hard-to-derive parameters,the easy-to-implement embedded model highlights the potential for real-life applications.

关键词： Distribution network microgrid adaptive protection intelligent electronic device machine learning

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Effect of Excited and Fourth Generation Leptons in Lepton Flavor Violating μ− → e- 2γ Decay

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chinese Physics Letters 2011年第8期28卷 51-53页

作者： s.c.İnan Department of Physics Cumhuriyet UniversitySivas 58140Turkey

we study the lepton flavor violatingμ−→e-2γdecay induced by the mediation of heavy leptons,such as the excited and fourth generation *** of these leptons inμ−→e-2γdecay are *** is found that the branching ratio of this decay is very sensitive to excited and fourth generation ***,we obtain the bounds on model parameters by using the current experimental limit of this decay.

关键词： decay excited branching

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Direct Graviton Production via Photon-Photon Fusion at the cERN-LHc

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chinese Physics Letters 2012年第3期29卷 63-66页

作者： s.c.İnan Department of Physics Cumhuriyet University58140SivasTurkey

The potential of pp→pγγp/→pGp process in scenarios of the Arkani-Hamed,Dimopoulos,Dvali(ADD)and Randall-sundrum(Rs)model at the LHc is examined,and 95%*** on the model parameters are *** is found that the sensitiv... 详细信息

关键词： reaction bounds LHc

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