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Nano-Micro Letters 2025年第2期17卷 169-186页

作者： Bitgaram Kim Myeong‑Chang Sung Gwang‑Hee Lee Byoungjoon Hwang Sojung Seo Ji‑Hun Seo Dong‑Wan Kim Department of Materials Science and engineering Korea University145 Anam‑RoSeongbuk‑GuSeoul 02841Republic of Korea School of civil Environmental and Architectural EngineeringKorea University145 Anam‑RoSeongbuk‑GuSeoul 02841Republic of Korea Materials Science and Chemical engineering Center Institute for Advanced Engineering(IAE)Yongin 17180Republic of Korea

A critical challenge hindering the practical application of lithium–oxygen batteries(LOBs)is the inevitable problems associated with liquid electrolytes,such as evaporation and safety *** study addresses these problems by proposing a modified polyrotaxane(mPR)-based solid polymer electrolyte(SPE)design that simultaneously mitigates solvent-related problems and improves ***-SPE exhibits high ion conductivity(2.8×10^(−3)S cm^(−1)at 25℃)through aligned ion conduction pathways and provides electrode protection ability through hydrophobic chain *** this mPR-SPE into solid-state LOBs resulted in stable potentials over 300 *** situ Raman spectroscopy reveals the presence of an LiO_(2)intermediate alongside Li_(2)O_(2)during oxygen *** situ X-ray diffraction confirm the ability of the SPE to hinder the permeation of oxygen and moisture,as demonstrated by the air permeability *** present study suggests that maintaining a low residual solvent while achieving high ionic conductivity is crucial for restricting the sub-reactions of solid-state LOBs.

关键词： Solid polymer electrolyte Lithium-oxygen batteries Polyrotaxane ion conductivity Hydrophobic chain

Structural Modal Parameter Recognition and Related Damage Identification Methods under Environmental Excitations: A Review

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Structural Durability & Health Monitoring 2025年第1期19卷 25-54页

作者： Chao Zhang Shang-Xi Lai Hua-Ping Wang School of civil engineering and Mechanics Lanzhou UniversityLanzhou730000China Key Laboratory of Special Functional Materials and Structural Design Ministry of EducationLanzhou UniversityLanzhou730000China

Modal parameters can accurately characterize the structural dynamic properties and assess the physical state of the ***,it is particularly signiﬁcant to identify the structural modal parameters according to the monitoring data information in the structural health monitoring(SHM)system,so as to provide a scientiﬁc basis for structural damage identiﬁcation and dynamic model modiﬁ*** view of this,this paper reviews methods for identifying structural modal parameters under environmental excitation and brieﬂy describes how to identify structural damages based on the derived modal *** paper primarily introduces data-driven modal parameter recognition methods(e.g.,time-domain,frequency-domain,and time-frequency-domain methods,etc.),brieﬂy describes damage identiﬁcation methods based on the variations of modal parameters(e.g.,natural frequency,modal shapes,and curvature modal shapes,etc.)and modal validation methods(e.g.,Stability Diagram and Modal Assurance Criterion,etc.).The current status of the application of artiﬁcial intelligence(AI)methods in the direction of modal parameter recognition and damage identiﬁcation is further *** on the pre-vious analysis,the main development trends of structural modal parameter recognition and damage identiﬁcation methods are given to provide scientiﬁc references for the optimized design and functional upgrading of SHM systems.

关键词： Structural health monitoring data information modal parameters damage identiﬁcation AI method

Asymptotics for filtration of polydisperse suspension with small impurities

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Applied Mathematics and Mechanics(English Edition) 2021年第1期42卷 109-126页

作者： L.I.KUZMINA Y.V.OSIPOV T.N.GORBUNOVA Department of Applied Mathematics National Research University Higher School of EconomicsMoscow 101000Russia Department of Applied Mathematics Moscow State University of Civil Engineering(National Research University)Moscow 129337Russia

A model for deep bed filtration of a polydisperse suspension with small impurities in a porous medium is *** suspended particles move with the same velocity as the carrier water and get blocked in the pore throats due to the size-exclusion mechanism of particle retention.A solution of the model in the form of a traveling wave is *** global exact solution for a multiparticle filtration with one high concentration and several low concentrations of suspended particles is obtained in an explicit *** analytic solutions for a bidisperse suspension with large and small particles are *** profiles of the retained small particles change monotony with *** global asymptotics for the filtration of a polydisperse suspension with small kinetic rates is constructed in the whole filtration zone.

关键词： deep bed filtration suspension colloid porous medium particle size distribution analytical model

Application of integrated simulation environment SIEMNED to the analysis of the MEPHIST-0 tokamak operation

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Plasma Science and Technology 2023年第3期25卷 222-233页

作者： D Yu SYCHUGOV S Yu SOLOVIEV A S ZHILKIN A V MELNIKOV S A KRAT Faculty of Computational Mathematics and Cybernetics Lomonosov Moscow State University national research Centre Kurchatov Institute national research Nuclear university moscow engineering Physics Institute national university moscow Institute of Physics and Technology

This paper presents the results of numerical simulation of plasma equilibrium and stability in the MEPHIST-0 tokamak with SIEMNED software and comparison of simulation results with *** determined characteristics of the vacuum chamber show that it significantly affects the entire *** various scenarios of the inductor operation,a comparison of experimental data and simulated currents and magnetic fields induced in the chamber was carried *** steady-state tokamak operation,a numerical study of equilibrium plasma configurations was carried out depending on the currents in the poloidal magnetic field coils and plasma *** vertical plasma instability was *** limiting values of plasma ellipticity preventing the vertical plasma instability were numerically *** simulations show that plasma equilibrium is supported by induced *** was shown numerically that magnetic configuration with‘zero of higher order’were obtained before the plasma shot,suggesting consistency between the simulation results and observations.

关键词： mathematical modelling tokamak installation MEPHIST-0

Enhanced U(Ⅵ) bioreduction by alginate-immobilized uranium-reducing bacteria in the presence of carbon nanotubes and anthraquinone-2,6-disulfonate

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Journal of Environmental Sciences 2015年第5期27卷 68-73页

作者： Weida Wang Yali Feng Xinhua Tang Haoran Li Zhuwei Du Aifei Yi Xu Zhang civil and Environmental engineering School University of Science and Technology Beijing national Key state Laboratory of Biochemical engineering Institute of Process Engineering Chinese Academy of Sciences national university of Singapore Department of Civil and Environmental EngineeringCentre for Water Research

Uranium-reducing bacteria were immobilized with sodium alginate, anthraquinone-2,6-disulfonate（AQDS）, and carbon nanotubes（CNTs）. The effects of different AQDS-CNTs contents, U（Ⅳ） concentrations, and metal ions on U（Ⅳ） reduction by immobilized beads were examined. Over 97.5% U（Ⅵ）（20 mg/L） was removed in 8 hr when the beads were added to 0.7% AQDS-CNTs, which was higher than that without AQDS-CNTs. This result may be attributed to the enhanced electron transfer by AQDS and CNTs. The reduction of U（Ⅵ） occurred at initial U（Ⅵ） concentrations of 10 to 100 mg/L and increased with increasing AQDS-CNT content from 0.1% to 1%. The presence of Fe（Ⅲ）, Cu（Ⅱ） and Mn（Ⅱ）slightly increased U（Ⅵ） reduction, whereas Cr（Ⅵ）, Ni（Ⅱ）, Pb（Ⅱ）, and Zn（Ⅱ） significantly inhibited U（Ⅵ） reduction. After eight successive incubation-washing cycles or 8 hr of retention time（HRT） for 48 hr of continuous operation, the removal efficiency of uranium was above 90% and 92%, respectively. The results indicate that the AQDS-CNT/AL/cell beads are suitable for the treatment of uranium-containing wastewaters.

关键词： Uranium Carbon nanotubes(CNTs) Redox mediator Anthraquinone-2 6-disulfonate(AQDS) Immobilization

A one-dimensional polynomial chaos method in CFD–Based uncertainty quantification for ship hydrodynamic performance

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Journal of Hydrodynamics 2013年第5期25卷 655-662页

作者：贺伟 DIEZ Matteo CAMPANA Emilio Fortunato STERN Frederick 邹早建 School of Naval Architecture Ocean and Civil Engineering Shanghai Jiao Tong University IIHR-Hydroscience and engineering The university of Iowa IIHR-Hydroscience and engineering The University of Iowa CNR-INSEAN National Research Council-Maritime Research Centre CNR-INSEAN National Research CouncilMaritime Research Centre School of Naval Architecture Ocean and Civil Engineering and State Key Laboratory of Ocean Engineering Shanghai Jiao Tong University

A one-dimensional non-intrusive Polynomial Chaos （PC） method is applied in Uncertainty Quantification （UQ） studies for CFD-based ship performances simulations. The uncertainty properties of Expected Value （EV） and Standard Deviation （SD） are evaluated by solving the PC coefficients from a linear system of algebraic equations. The one-dimensional PC with the Legendre polynomials is applied to：（1） stochastic input domain and （2） Cumulative Distribution Function （CDF） image domain, allowing for more flexibility. The PC method is validated with the Monte-Carlo benchmark results in several high-fidelity, CFD-based, ship UQ problems, evaluating the geometrical, operational and environmental uncertainties for the Delft Catamaran 372. Convergence is studied versus PC order P for both EV and SD, showing that high order PC is not necessary for present applications. Comparison is carried out for PC with/without the least square minimization when solving the PC coefficients. The least square minimization, using larger number of CFD samples, is recommended for current test cases. The study shows the potentials of PC method in Robust Design Optimization （RDO） and Reliability-Based Design Optimization （RBDO） of ship hydrodynamic performances.

关键词： Uncertainty Quantification (UQ) Polynomial Chaos (PC) method Legendre polynomials ship design

Contribution of the Earth's gravitational potential to variations in orbital motion of short-period comets

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research in Astronomy and Astrophysics 2016年第4期16卷 1-6页

作者： Valentina M.Chepurova Nelli V.Kulikova Elena N.Petrovskaya Sternberg Astronomical Institute Lomonosov Moscow State University Department of Computer Systems Networks and Technologies National Research Nuclear University Moscow Engineering Physics Institute Institute for Nuclear Power Engineering

We present simulation results on evolution development of orbital motion of short-period comets with the revolution period not exceeding 6-7 years, namely comets 21P/Giacobini-Zinner, 26P/Grigg- Skjellerup and 7P/Pons-Winnecke. The calculations cover the range from the date of the object＇s discovery to 2100. Variations in the objects＇ orbital elements under the action of gravity disturbances, taking Earth＇s gravitational potential into account when the small body approaches, are analyzed. Corrected dates of peri- helion passages can be used for scheduling observations.

关键词： comets: individual (21P/Giacobini-Zinner 26P/Grigg-Skjellerup 7P/Pons-Winnecke)-- me-teorites meteors meteoroids

Fragility Assessment of Pre-Northridge Steel Moment Frames Using Finite-Length Plastic Hinge Elements and Concentrated Plasticity Fracture Elements

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Computer Modeling in engineering & Sciences 2019年第9期120卷 657-676页

作者： Filipe L.A.Ribeiro Andre RBarbosa Luis CNeves national Laboratory of civil engineering(LNEC)&CERIS-civil engineering research and Innovation for Sustainability DECivilUniversity of LisbonLisbonPortugal School of civil and Construction engineering Oregon State UniversityOregonUSA and University of BristolBristolUK Resilience engineering research Group University of NottinghamNottinghamUK.

Although pre-Northridge earthquake steel moment resisting frame buildings have been shown to be susceptible to brittle connection failures,they still represent a large fraction of the existing steel buildings in the United states of *** this study,the performance of the 3-and 9-story Los Angeles pre-Northridge SAC buildings are analyzed considering ductile and brittle beam-column connection failures,and their *** paper contributes to understanding the influence of uncertainty associated with connections brittle fracture on building interstory deformation capacity and its impact on bias and variability of fragility functions and loss *** results show that considering brittle connections leads to significantly l arger d rift demands a nd t o h igher r epair costs,particularly under intense ground *** fragility curve parameters are derived that account for the effect of the uncertainty of the strength and deformation capacity of brittle connections.

关键词： Brittle fracture finite-length p lastic h inge f ragility c urves r epair c ost ratio welded-flange connections

Numerical study of the semi-circular bend dynamic fracture toughness test using discrete element models

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Science China(Technological Sciences) 2015年第9期58卷 1587-1595页

作者： ZHAO GaoFeng KAZERANI Tohid MAN Ke GAO Mz ZHAO Jian state Key Laboratory of Hydraulic engineering Simulation and Safety School of Civil Engineering Tianjin University Centre for Infrastructure engineering and Safety School of Civil and Environmental Engineering University of New South Wales state Key Lab of Hydraulics and Mountain River engineering Sichuan University civil engineering School Faculty of Engineering University of Nottingham University Park Beijing research Institute of Uranium Geology Department of civil engineering Monash University

The semi-circular bend(SCB) dynamic fracture toughness test is simulated using discrete element models. The influence of the frictional boundary condition, constitutive law and specimen thickness on the test measurements is investigated. It is found that friction between loading plates and the rock specimen affects the test results. Therefore, friction must be carefully considered to obtain accurate measurements. The simulation results also show that in contrast to the 2D model in which a rate-dependent cohesive law must be introduced, 3D models with a rate-independent law can produce good results. Furthermore, the study suggests that test measurements are seriously affected by specimen thickness; thus, full 3D modeling is required for simulation of the SCB test.

关键词： dynamic fracture toughness rock discrete element model friction

Determination of recovery factor for simulation of non-equilibrium sedimentation in reservoir

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International Journal of Sediment research 2015年第1期30卷 68-73页

作者： Jungkyu AHN ChihTed YANG civil and Environmental engineering Department Seoul National University Hydroscience and Training Center Civil and Environmental Engineering DepartmentColorado State University

It is generally acceptable to assume that bed material load is equal to sediment transport capacity,if the exchange between bed and flow occurs ***,for non-equilibrium sediment transport process,there are spatial and temporal delay *** is especially true for reservoir sedimentation *** factor is a coefficient for non-equilibrium sediment *** detemiination of recovery factor can be obtained either experimentally or *** is no consensus on the value of recovery factor in previous *** simulations with a semi-two dimensional sediment transport model,GSTARS4,were conducted in this study using various methods for the determination of recovery factor proposed by previous *** results of a reservoir geometric change were sensitive to the selection of recovery *** was found that the recovery factor as a function of sediment size provided the most reasonable result.A functional relationship between recovery factor and sediment size was determined by comparing simulated and measured reservoir geometric *** sediment has small value of recovery factor.

关键词： Non-equilibrium sediment transport Recovery factor GSTARS Reservoir sedimentation Sediment transport