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Dy.amic of Scalar Bosons in Aharonov-Bohm Magnetic Field

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Journal of Applied Mathematics and Phy.0}cs 2024年第1期12卷 268-276页

作者： Frédéric D. y. Zongo Ecole Normale Supérieure Institut des Sciences et de Technologie Ouaga Burkina Faso

We study.the dy.amic of scalar bosons in the presence of Aharonov-Bohm magnetic field. First, we give the differential equation that governs this dy.amic. Secondly. we use variational techniques to show that the following Schrödinger-Newton equation: , where A is an Aharonov-Bohm magnetic potential, has a unique ground-state solution.

关键词： Scalar Boson Aharonov-Bohm Magnetic Field Schrödinger-Newton Equation Ground-State Solution

Spatiotemporal Characteristics and Influencing Factors of the Sy.ergistic Effect of Pollution Reduction and Carbon Reduction in China

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Huanjing Kexue/Environmental Science 2024年第9期45卷 4993-5002页

作者： Wang y.-N. Li B.-X. Zhang y.-X. Zhao y. Miao C.-K. An J.-Q. School of Economics and Management Northwest A&F University Yangling 712100 China

Based on the use of the coupling coordination model to calculate the coupling coordination degree of carbon emission and pollutant control，the national，regional，and provincial spatiotemporal characteristics of the sy.ergistic effect of pollution control and carbon emissions reduction in China were further analy.ed，facilitating the crucial to identification of key.areas. The fixed effects regression models and provincial panel data from 2006 to 2020 were used to explore factors contributing to better sy.ergizing the reduction of pollution and carbon emissions in China. On this basis，the adjustment variable of R&D investment intensity.was introduced，and the regulation effect model was constructed to further explore the influence mechanism of the sy.ergistic effect of pollution reduction and carbon reduction. The results showed that：sy.ergy.exists between carbon emission reduction and the air pollution control sy.tem，the evolution of the sy.ergistic effect of pollution reduction and carbon reduction in China presented an inverted "U"-shaped trend from 2006 to 2020，and there was spatial aggregation and a spatial spillover effect in pollution reduction and carbon reduction. The sy.ergistic governance of carbon emission and pollutant control was still at a relatively.low level. The carbon emission and air pollutant emission sy.tems were still in an unstable and uncoordinated state. The results showed that：The degree of coordination of eastern China，central China，and western China decreased in turn. At the national level，energy.consumption structure，per capita GDP，and the proportion of green investment were the main factors affecting the sy.ergistic effect of pollution reduction and carbon. The heterogeneity.of the influencing factors existed in the central，eastern，and western regions on industrial structure，energy.consumption structure，energy.utilization efficiency.per capita GDP，urbanization rate，the proportion of green investment，and transportation structure. The intens

关键词： fixed effects regression influencing mechanism moderating effect pollution and carbon emission reduction spatio-temporal characteristic

Rational design of AgGaS/ZnS/ZnS quantum dots with a near-unity.photoluminescence quantum y.eld via double shelling scheme

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Journal of Materials Science & Technology 2024年第2期169卷 235-242页

作者： H.X.Lu H.Liu Z.Z.Fu y.y.Chen H.Q.Dai Z.Hu W.L.Zhang R.Q.Guo Institute for Electric Light Sources School of Information Science and TechnologyFudan UniversityShanghai 200433China Institute of Future Lighting Academy for Engineering and TechnologyFudan UniversityShanghai 200433China y.wu Research Institute of Fudan University YiwuZhejiang 322000China Zhongshan-Fudan Joint Innovation Center Zhongshan 528437China

In this study.a two-step method was used to sy.thesize highly.luminescent AgGaS/ZnS/ZnS quantum dots(QDs).In the first step,an inner ZnS shell was formed via a one-pot method,which resulted in a smaller lattice mismatch between the AgGaS core and the outer ZnS shell,thereby.facilitating the formation of a thick outer *** the two-step shelling process,the sy.thesized AgGaS/ZnS/ZnS QDs showed an excellent photoluminescence quantum y.eld(PLQy.of 96.4%with a peak wavelength of 508 nm,repre-senting the highest PLQy.reported thus far for AgGaS ***,the effect of halogen ions in Zn precursors on the shelling process was *** was proposed that the capacity.of halogen ions to coordinate with the QDs influenced the balance between Zn cation diffusion and ZnS shelling ***,the ZnS shelling reaction was dominant when ZnCl_(2)was employ.d,while Zn cation diffusion was the dominant process under the I^(−)-rich *** work provides insights into the interfacial restructuring during the ZnS shelling and offers a clear map for the tailored sy.thesis of core/shell QDs.

关键词： AgGaS Quantum dots Photoluminescence Core/shell Alloy.d core/shell interface

Conventional and micro scale finite element modeling for metal cutting process:A review

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Chinese Journal of Aeronautics 2024年第2期37卷 199-232页

作者： Le WAng Caixu y.E Xianli LIU Ming LI y.ngshi XU Steven y.LIAng Key.Laboratory.of Advanced Manufacturing and Intelligent Technology Ministry of EducationHarbin University of Science and TechnologyHarbin 150080China George W.Woodruff School of Mechanical Engineering Georgia Institute of TechnologyAtlanta 30332USA

The metal cutting process is accompanied by.complex stress field,strain field,temperature *** comprehensive effects of process parameters on chip morphology.cutting force,tool wear and residual stress are complex and *** element method(FEM)is considered as an effective method to predict process variables and reveal microscopic phy.0}cal phenomena in the cutting ***,the finite element(FE)simulation is used to research the conventional and micro scale cutting process,and the differences in the establishment of process variable FE simulation models are distinguished,thereby.improving the accuracy.of FE *** reliability.and effectiveness of FE simulation model largely.depend on the accuracy.of the simulation method,constitutive model,friction model,damage model in describing mesh element,the dy.amic mechanical behavior of materials,the tool-chip-workpiece contact process and the chip formation *** this paper,the FE models of conventional and micro process variables are comprehensively.and up-to-date reviewed for different materials and machining *** purpose is to establish a FE model that is more in line with the real cutting conditions,and to provide the possibility.for optimizing the cutting process *** development direction of FE simulation of metal cutting process is discussed,which provides guidance for future cutting process modeling.

关键词： Conventional and micro scale Finite element simulation Metal cutting process Micro cutting Modeling

A particle-resolved heat-particle-fluid coupling model by.DEM-IMB-LBM

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第6期16卷 2267-2281页

作者： Ming Xia Jinlong Fu y.T.Feng Fengqiang Gong Jin y. Hunan Key.Laboratory.of Geomechanics and Engineering Safety Xiangtan UniversityXiangtan411105China Zienkiewicz Institute for Modelling Data and AISwansea UniversitySwanseaSA18EPUK School of Civil Engineering Southeast UniversityNanjing211189China Fujian Research Center for Tunneling and Urban Underground Space Engineering Huaqiao UniversityXiamen361021China

Multifield coupling is frequently.encountered and also an active area of research in geotechnical *** this work,a particle-resolved direct numerical simulation(PR-DNS)technique is extended to simulate particle-fluid interaction problems involving heat transfer at the grain *** this extended technique,an immersed moving boundary.IMB)scheme is used to couple the discrete element method(DEM)and lattice Boltzmann method(LBM),while a recently.proposed Dirichlet-ty.e thermal boundary.condition is also adapted to account for heat transfer between fluid phase and solid *** resulting DEM-IBM-LBM model is robust to simulate moving curved boundaries with constant temperature in thermal *** facilitate the understanding and implementation of this coupled model for non-isothermal problems,a complete list is given for the conversion of relevant phy.0}cal variables to lattice ***,benchmark tests,including a single-particle sedimentation and a two-particle drafting-kissing-tumbling(DKT)simulation with heat transfer,are carried out to validate the accuracy.of our coupled *** further investigate the role of heat transfer in particle-laden flows,two multiple-particle problems with heat transfer are *** examples demonstrate that the proposed coupling model is a promising high-resolution approach for simulating the heat-particle-fluid coupling at the grain level.

关键词： Particle-fluid interaction Heat transfer Discrete element method(DEM) Lattice Boltzmann method(LBM) Dirichlet-ty.e thermal boundary Direct numerical simulation

Optimal Coordination of Transportable Power Sources and Repair Crews for Service Restoration of Distribution Networks Considering Uncertainty.of Traffic Congestion

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Journal of Modern Power Sy.tems and Clean Energy 2024年第1期12卷 189-201页

作者： Zhao Shi y.n Xu Dunjian Xie Shiwei Xie Amer M.y.M.Ghias Nany.ng Technological University Singapore the School of Electrical Engineering and Automation Fuzhou UniversityFuzhou 350108China

This paper proposes a new method for service restoration of distribution network with the support of transportable power sources(TPSs)and repair crews(RCs).Firstly.a coupling model of distribution networks and vehicle routing of TPSs and RCs is proposed,where the TPSs serve as emergency.power supply.sources,and the RCs are used to repair the faulted *** the uncertainty.of traffic congestion,the probability.distribution of the travel time spent on each road is derived based on the Nesterov user equilibrium model,and a two-stage stochastic program is formulated to determine the optimal routings of TPSs and *** efficiently.solve the proposed stochastic mixed-integer linear program(MILP),a two-phase scenario reduction method is then developed to scale down the problem size,and an adaptive progressive hedging algorithm is used for an efficient *** effectiveness of the proposed methods and algorithms has been illustrated in a modified IEEE 33-bus sy.tem.

关键词： Service restoration distribution network traffic uncertainty transportable power source repair crew stochastic program

Challenges and opportunities for battery.health estimation:Bridging laboratory.research and real-world applications

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Journal of Energy.Chemistry 2024年第2期89卷 434-436,I0011页

作者： Te Han Jinpeng Tian C.y.Chung y.-Ming Wei Center for Energy.and Environmental Policy.Research Beijing Institute of TechnologyBeijing 100081China School of Management and Economics Beijing Institute of TechnologyBeijing 100081China Department of Electrical and Electronic Engineering and Research Centre for Grid Modernization The Hong Kong Polytechnic UniversityKowloon 999077Hong KongChina

Addressing climate change demands a significant shift away.from fossil fuels,with sectors like electricity.and transportation rely.ng heavily.on renewable *** to this transition are energy.storage sy.tems,notably.lithium-ion *** time,these batteries degrade,affecting their efficiency.and posing safety.*** and predicting battery.aging is essential,especially.estimating its state of health(SOH).Various SOH estimation methods exist,from traditional model-based approaches to machine learning approaches.

关键词： Energy.storage sy.tems State of health Multi-source data Scientific AI Data-sharing mechanism

Stability.and Generalization of Hy.ergraph Collaborative Networks

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Machine Intelligence Research 2024年第1期21卷 184-196页

作者： Michael K.ng Hanrui Wu Andy.y.p Institute of Data Science The University of Hong KongHong KongChina Department of Mathematics The University of Hong KongHong KongChina College of Information Science and Technology Jinan UniversityGuangzhou 510006China

Graph neural networks have been shown to be very.effective in utilizing pairwise relationships across ***,there have been several successful proposals to generalize graph neural networks to hy.ergraph neural networks to exploit more com-plex *** particular,the hy.ergraph collaborative networks y.eld superior results compared to other hy.ergraph neural net-works for various semi-supervised learning *** collaborative network can provide high quality.vertex embeddings and hy.eredge embeddings together by.formulating them as a joint optimization problem and by.using their consistency.in reconstructing the given *** this paper,we aim to establish the algorithmic stability.of the core lay.r of the collaborative network and provide generaliz--ation *** analy.0}s sheds light on the design of hy.ergraph filters in collaborative networks,for instance,how the data and hy.ergraph filters should be scaled to achieve uniform stability.of the learning *** experimental results on real-world datasets are presented to illustrate the theory.

关键词： Hy.ergraphs vertices hy.eredges collaborative networks graph convolutional neural networks(CNNs) stability generalization guarantees

In-situ construction of grass-like hy.rid architecture responsible for extraordinary.corrosion performance: Experimental and theoretical approach

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Nano Materials Science 2024年第1期6卷 44-59页

作者： T.Suhartono F.Hazmatulhaq y.Sheng A.Chaouiki M.P.Kamil y.G.Ko Materials Electrochemistry.Group School of Materials Science and EngineeringYeungnam UniversityGyeongsan38541Republic of Korea Research Center for Advanced Materials National Research and Innovation Agency(BRIN)South TangerangBanten15314Indonesia

Despite the engineering potential by.the co-existence of inorganic and organic substances to protect vulnerable metallic materials from corrosive environments,both their interaction and in-situ formation mechanism to induce the nature-inspired composite remained less *** present work used three distinctive mercaptobenzazole(MB)compounds working as corrosion inhibitors,such as 2-mercaptobenzoxazole(MBO),2-mercaptobenzothiazole(MBT),and 2-mercaptobenzimidazole(MBI)in a bid to understand how the geometrical structure arising from O,S,and N atoms affected the interaction toward inorganic *** compounds that were used here to control the corrosion kinetics would be interacted readily.with the pre-existing MgO lay.r fabricated by.plasma *** phenomenon triggered the nucleation of the root network since MB compounds were seen to be adsorbed actively.on the defective surface through the active sites in MB ***,the molecule with twin donor atoms adjacent to the mercapto-sites affected the facile growth of the grass-like structures with‘uniform’distribution via molecular self-assembly.which showed better corrosion performance than those with having dissimilar donor atoms with the inhibition efficiency.η)of 97%*** formation mechanism underly.ng nucleation and growth behavior of MB molecule was discussed concerning the theoretical calculation of density.functional theory.

关键词： Nature-inspired composite Organic-inorganic interaction Corrosion inhibitor Density.functional theory Electrochemistry