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Journal of.Environmental Sciences 2024年第5期139卷 245-257页

作者： Chaomin Jia Jianbing wang Huijiao wang Sichao Zhu Xiaohui Zhang Yuxiang wang School of.Chemical&Environmental Engineering China University of Mining&Technology-BeijingBeijing 100083China Beijing Polytechnic Beijing 100176China Chinese Society f.r Urban Studies Beijing 100835China

Water f.uoride pollution has caused non-negligible harm to the environment and humans,and thus it is crucial to f.nd a suitable treatment *** this study,La-f.@PTA adsorbent was synthesized f.r the def.uoridation of.mine *** results showed that the optimum conditions f.r def.uoridation by La-f.@PTA were p H close to 7.0,the initial f.concentration of.10 mg/L,the dosage of.0.5 g/L and the adsorption time of.240 *** with SO_4^(2-),Cl^(-),NO_(3)^(-),Ca^(2+)and Mg^(2+),CO_(3)^(2-)and HCO_(3)^(-)presented severer inhibition on f.uoride uptake by La-f.@*** adsorption process f.ts well with the pseudo-second-order kinetic model and f.eundlich model,and the maximum adsorption capacity of.Langmuir model was 95 mg/***-bed adsorption results indicated that f.uoride in practical f.uorinated mine water could be ef.ectively removed f.om 3.6 mg/L to less than 1.5 mg/L within130 bed volume(BV)by using 1.5 g La-f.@***,the adsorbent still had good adsorption capacity af.er regeneration,which conf.rms the great application potential of.La-f.@PTA as a f.uoride ion *** mechanism analysis showed that La-f.@PTA adsorption of.f.uorine ions is a physicochemical reaction driven by electrostatic attraction and ion exchange.

关键词： Adsorption La-f.@PTA f.uoride ion Mine water Mechanism

Hollow Multishelled Structure Reviving Lithium Metal Anode f.r High-energy-density Batteries

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Chemical Research in Chinese Universities 2024年第3期40卷 428-436页

作者： wang Haoyu WEI Peng wang Jiangyan wang Dan State Key Laboratory of.Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeIjing 100190P.R.China University of.Chinese Academy of.Sciences Beijing 100049P.R.China Key Laboratory of.Biopharmaceutical Preparation and Delivery Chinese Academy of SciencesBeijing 100190P.R.China

Due to its highest theoretical capacity and its lowest redox potential,lithium(Li)metal has been considered as the ultimate anode choice f.r high-energy-density rechargeable ***,its commercialization is severely hindered by its poor cyclic stability and saf.ty *** material structure design concepts have been raised to address these f.ilure models,wherein,hollow structure has shown great power in solving the ***,a hollow multishelled structure(HoMs)f.atured with two or more shells has been proved to be more ef.icient to improve Li metal anode than their single-shelled ***,this up-to-date review summarizes the recent progress of.the application of.HoMs in Li metal anode,including their adoption as Li metal host,artif.cial solid electrolyte interphase f.lm,electrolyte additive,solid state electrolyte,*** of.ers unique advantages,such as suppressing Li dendrite growth,stabilizing electrode-electrolyte interf.ce,and improving overall battery *** research directions are outlined,emphasizing the need f.r multif.nctional integrated smart HoMS design and large-scale f.brication of.HoMS through low-cost accurate method to f.rther advance the commercialization of.Li metal batteries.

关键词： Hollow multishelled structure Lithium metal anode Solid electrolyte interphase Coulombic ef.iciency Cyclic stability

Research on the cuttings discharge in air cushion chamber of.slurry shield based on Cf.-DEM coupling method Author links open overlay panel

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Particuology 2024年第8期91卷 88-105页

作者： Han wang Wantao Ding Weimin Yang Chengzhen wang Wenduan Yu Zhicheng wang School of.Qilu Transportation Shandong UniversityJinan250002China China Railway 14th Bureau Group Co. LtdJinan250101China

The rapid discharge of.cuttings f.om the air cushion chamber is crucial f.r the construction saf.ty and excavation ef.iciency of.the slurry *** studies have mainly f.cused on the transport characteristics of.cuttings in the slurry discharge pipe,while the complete process of.cuttings entering the slurry discharge pipe f.om the air cushion chamber until they are discharged was of.en *** on the Cf.-DEM coupling method and combined with actual engineering,this paper established a numerical model that can more completely ref.ect the cuttings discharge process during slurry shield tunneling,and the ef.ects of.the slurry velocity at slurry gate and scouring pipes,inclination angle of.slurry discharge pipe,cuttings diameter and shape coef.icient were investigated by analyzing the variation in the mass f.ow rate,mass of.discharged cuttings,and discharged *** results revealed that increasing the slurry velocity can promote the discharge of.*** keep the discharged rate at a high level,it is recommended that the slurry velocity at the slurry gate should be greater than 0.15 m/*** the inclination angle of.the discharge pipe is conducive to the rapid discharge of.*** with large diameter or small shape coef.icient are more prone to accumulate in the air cushion chamber and cause clogging *** research results not only help to improve engineers'understanding of.cuttings discharge in slurry shield,but also provide practical guidance f.r f.rmulating relevant construction measures.

关键词： Slurry shield Cf.-DEM coupling method Cuttings discharge Aircushion chamber Slurry discharge pipe

Ultra-large aluminum shape casting:Opportunities and challenges

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China f.undry 2024年第5期21卷 397-408页

作者： Qi-gui wang Andy wang Jason Coryell Advanced Materials Technology&Virtualization GM Global Technical CenterWarrenMI USA

Ultra-large aluminum shape castings have been increasingly used in automotive vehicles,particularly in electric vehicles f.r light-weighting and vehicle manuf.cturing cost *** most of.them are structural components subject to both quasi-static,dynamic and cyclic loading,the quality and quantif.able perf.rmance of.the ultra-large aluminum shape castings is critical to their success in both design and *** paper brief.y reviews some application examples of.ultra-large aluminum castings in automotive industry and outlines their advantages and *** af.ecting quality,microstructure and mechanical properties of.ultra-large aluminum castings are evaluated and discussed as aluminum shape casting processing is very complex and of.en involves many competing mechanisms,multi-physics phenomena,and potentially large uncertainties that signif.cantly inf.uence the casting quality and *** analysis and mechanical property assessment of.an ultra-large aluminum shape casting are *** are highlighted and suggestions are made f.r robust design and manuf.cturing of.ultra-large aluminum castings.

关键词： ultra-large castings aluminum light-weighting quality microstructure materials properties

Quantized bound states around a vortex in anisotropic superconductors

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Science China(Physics,Mechanics & Astronomy) 2024年第6期67卷 146-155页

作者： Ke Xiang Da wang Qiang-Hua wang National Laboratory of.Solid State Microstructures&School of.Physics Nanjing UniversityNanjing 210093China Collaborative Innovation Center of.Advanced Microstructures Nanjing 210093China

The bound states around a vortex in anisotropic superconductors is a longstanding yet important *** this work,we develop a variational theory on the basis of.the Andreev approximation to obtain the energy levels and wave f.nctions of.the low-energy quantized bound states in superconductors with anisotropic pairing on arbitrary f.rmi *** the case of.circular f.rmi surf.ce,the ef.ective Schr¨odinger equation yielding the bound state energies gets back to the theory proposed by Volovik and Kopnin many years *** generalization here enables us to prove the equidistant energy spectrum inside a vortex in a broader class of.*** importantly,we are now able to obtain the wave f.nctions of.these bound states by projecting the quasiclassical wave f.nction on the eigenmodes of.the ef.ective Schr¨odinger equation,going beyond the quasiclassical Eilenberger results,which,as we f.nd,are sensitive to the scattering *** the case of.isotropic f.rmi surf.ce,the spatial prof.le of.the low-energy local density of.states is dominated near the vortex center and elongates along the gap antinode directions,in addition to the ubiquitous f.iedel oscillation arising f.om the quantum intef.rence neglected in the Eilenberger ***,as a consequence of.the pairing anisotropy,the quantized wave f.nctions develop a peculiar distribution of.winding number,which reduces stepwise towards the vortex *** work provides a f.exible way to study the vortex bound states in the f.ture.

关键词： vortex bound state anisotropic superconductor Andreev approximation

Data-Driven Design f.r Targeted Regulation of.Heat Transf.r in Carbon/Carbon Composite Structure

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Journal of.Thermal Science 2024年第2期33卷 648-657页

作者： XIAO Heye wang Zelin wang Hui JI Ritian Unmanned System Research Institute Northwestern Polytechnical UniversityXi’an710072China School of.Aeronautics Northwestern Polytechnical UniversityXi’an710072China Research&Development Institute of.Northwestern Polytechnical University in Shenzhen Shenzhen518063China MOE Key Laboratory of.Thermo-f.uid Science and Engineering School of Energy and Power EngineeringXi’an Jiaotong UniversityXi’an710049China

Targeted regulation of.heat transf.r in carbon/carbon composite structure is built f.r cooling electronic device.A three-dimensional data-driven design model coupling genetic algorithm(GA) with self.adaption deep learning f.r targeted regulation of.heat transf.r in built structure is *** self.adaption deep learning model predicts the temperature of.built structure closer to optimal value in GA *** distributions of.pore and carbon f.ber bundles in built structure are optimized by the proposed *** surf.ce temperature of.electronic device in the optimized structures is 19.1%-27.5% lower than that in the initial conf.gurations when the porosity of.built structure varies f.om 3% to 11%.The surf.ce temperature of.electronic device increases with an increase in *** built structure with carbon f.ber bundles near the surf.ce of.electronic device and pore distribution in the middle of.structure has a higher heat dissipation capacity compared with that in the initial ***,the computation time of.the proposed model is less than one tenth compared with that of.the traditional genetic algorithm.

关键词： targeted regulation of.heat transf.r self.adaption deep learning genetic algorithm carbon/carbon composite structure

Ef.ect of.Texture on the Grain-Size-Dependent f.nctional Properties of.NiTi Shape Memory Alloys and Texture Gradient Design:A Phase f.eld Study

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Acta Mechanica Solida Sinica 2024年第1期37卷 10-32页

作者： Bo Xu Beihai Huang Chong wang Qingyuan wang f.ilure Mechanics and Engineering Disaster Prevention Key Laboratory of Sichuan ProvinceSichuan UniversityChengdu 610065China Department of.Mechanical Science and Engineering College of Architecture and EnvironmentSichuan UniversityChengdu 610065China Key Laboratory of.Deep Underground Science and Engineering Ministry of EducationSichuan UniversityChengdu 610065China

Texture is inevitably introduced during the manuf.cturing of.most NiTi shape memory alloys(SMAs),and the textured nanocrystalline NiTi has been extensively employed in ***,the ef.ect of.texture,and the joint ef.ect of.grain size(GS)and texture on the f.nctional properties of.NiTi SMAs and the corresponding microscopic mechanisms have not been clearly understood *** this work,based on the phase f.eld method,the ef.ect of.texture on the GS-dependent f.nctional properties of.NiTi SMAs,including super-elasticity(SE),one-way shape memory ef.ect(OWSME),and stress-assisted two-way shape memory ef.ect(SATWSME),is investigated,and the corresponding microscopic mechanisms are ***,the samples with discrete geometrical gradients and/or texture gradients are designed to achieve graded f.nctional *** simulation results indicate that the dependence of.f.nctional properties on texture is due to the ef.ect of.crystallographic orientation on martensite transf.rmation and reorientation,which can lead to dif.erent inelastic *** the designed samples with texture gradients,the stress–strain responses of.sheets with various textures are dif.erent,allowing f.r the coordination of.overall def.rmation of.the sample by combining such sheets,with varying inelastic def.rmation ***,the overall response of.the sample dif.ers f.om that without texture gradient,leading to the achievement of.graded f.nctional *** simulation results and new f.ndings in this work contribute to a deeper understanding of.the ef.ects of.texture,GS,and their interaction on the f.nctional properties of.SMAs,and provide valuable ref.rence f.r the design and development of.SMA-based devices with desired f.nctional properties.

关键词： Phase f.eld NiTi shape memory alloy Texture Grain size f.nctional property Texture gradient

Adaptive Robust Servo Control f.r Vertical Electric Stabilization System of.Tank and Experimental Validation

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Def.nce Technology（防务技术） 2024年第1期31卷 326-342页

作者： Darui Lin Xiuye wang Yimin wang Guolai Yang School of.Mechanical Engineering Nanjing University of Science and TechnologyNanjing210094China

A tracking stability control problem f.r the vertical electric stabilization system of.moving tank based on adaptive robust servo control is *** paper mainly f.cuses on two types of.possibly f.st timevarying but bounded uncertainty within the vertical electric stabilization system:model parameter uncertainty and uncertain ***,the vertical electric stabilization system is constructed as an uncertain nonlinear dynamic system that can ref.ect the practical mechanics transf.r process of.the ***,the dynamical equation in the f.rm of.state space is established by designing the angular tracking ***,the comprehensive parameter of.system uncertainty is designed to estimate the most conservative ef.ects of.***,an adaptive robust servo control which can ef.ectively handle the combined ef.ects of.complex nonlinearity and uncertainty is *** f.asibility of.the proposed control strategy under the practical physical condition is validated through the tests on the experimental *** paper pioneers the introduction of.the internal nonlinearity and uncertainty of.the vertical electric stabilization system into the settlement of.the tracking stability control problem,and validates the advanced servo control strategy through experiment f.r the f.rst time.

关键词： Adaptive robust servo control Experimental validation Nonlinearity compensation System uncertainty Vertical electric stabilization system

Energy transf.r, anticounterf.iting, white light emission and sensing in f.ne-regulating series of.lanthanide metal-organic f.ameworks

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Journal of.Rare Earths 2024年第3期42卷 446-454,I0001页

作者： Juanjuan Xue Yao wang Guoping Yang Yaoyu wang Key Laboratory of.Synthetic and Natural f.nctional Molecule Chemistry of.the Ministry of.Education Shaanxi Key Laboratory of Physico-Inorganic ChemistryCollege of Chemistry&Materials ScienceNorthwest UniversityXi'an710127China

Three lanthanide ions and a rigid(1,1'-biphenyl)-2,4,6-tricarboxylic acid(H_(3)bptc) ligand led to the isostructural lanthanide metal-organic f.ameworks(Ln-MOf.) {[Ln(bptc)(H_(2)O)_(3)]·3H_(2)O}_n(Lnbptc, Ln = Eu,Tb, Gd, Eu_(x)Tb_(1—x), Eu_(x)Gd_(1-x), Tb_(x)Gd_(1-x), and Eu_(0.12)Tb_(0.52)Gd_(0.36)). The density f.nctional theory(Df.) and time-dependent Df. calculation were expanded on H_3bptc, which point to the occurrence of.“antenna ef.ect”. The minor diameter samples of.Eubptc, Tbbptc, and Gdbptc can also be attained via the microwave synthesis and employed f.r handwriting anticounterf.iting. Interestingly, the typical red emission of.Eu^(3+) and green emission of.Tb~(3+) could be f.ne-tuned by Gd^(3+) via chemical mixing to be f.ll-color emissions bimetallic doped Eu_(x)Tb_(1-x)bptc, Eu_(x)Gd_(1-x)bptc, and Tb_(x)Gd_(1-x)bptc. The above synthetic bimetallic MOf. can be f.xed in positioning boxes of.quick response(QR) codes with diverse emission f.r anticounterf.iting. The message can be decoded under the irradiation of.365 nm ultraviolet lamp while invisible in the daylight. Notably, the trimetallic doped Eu_(0.12)Tb_(0.52)Gd_(0.36)bptc emits white light with the CIE color coordinate(0.34, 0.34). f.rthermore, Tbbptc is demonstrated to be a sensitive probe toward nitrobenzene and acetone with multiple mechanisms.

关键词： Metal-organic f.ameworks Anticounterf.iting White light-emitting Sensing Rare earths

A Mean-f.eld Game f.r a f.rward-Backward Stochastic System With Partial Observation and Common Noise

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IEEE/CAA Journal of.Automatica Sinica 2024年第3期11卷 746-759页

作者： Pengyan Huang Guangchen wang Shujun wang Hua Xiao the School of.Control Science and Engineering Shandong University the School of.Statistics and Mathematics Shandong University of Finance and Economics IEEE the School of.Management Shandong University the School of.Mathematics and Statistics Shandong University

This paper considers a linear-quadratic(LQ) meanf.eld game governed by a f.rward-backward stochastic system with partial observation and common noise,where a coupling structure enters state equations,cost f.nctionals and observation ***,to reduce the complexity of.solving the meanf.eld game,a limiting control problem is *** virtue of.the decomposition approach,an admissible control set is *** a f.lter technique and dimensional-expansion technique,a decentralized control strategy and a consistency condition system are derived,and the related solvability is also ***,we discuss an approximate Nash equilibrium property of.the decentralized control ***,we work out a f.nancial problem with some numerical simulations.

关键词： Decentralized control strategy ϵ-Nash equilibrium f.rward-backward stochastic system mean-f.eld game partial observation