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Coupled effects of particle overall regularity and sliding friction on the shear behavior of uniformly graded dense sands

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Journal of Rock Mechanics and Geotechnical engineering 2022年第3期14卷 873-885页

作者： Jiayan Nie Shiwei Zhao Yifei Cui Yu Wang State Key Laboratory of Hydroscience and Engineering Tsinghua UniversityBeijing100084China South China Institute of Geotechnical Engineering South China University of TechnologyGuangzhou510640China Key Laboratory of Mountain Hazards and Surface Process Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu610041China University of Chinese Academy of Sciences Beijing100049China

Particle morphology has been regarded as an important factor affecting shear behaviors of sands,and covers three important aspects,*** form(overall shape),local roundness(large-scale smoothness),and surface texture(roughness)in terms of different observation *** features of different aspects can be independent of each other but might have coupled effects on the bulk behavior of sands,which has been not explored thoroughly *** paper presents a systematic investigation of the coupled effects of the particle overall regularity(OR)and sliding friction on the shear behavior of dense sands using three-dimensional(3D)discrete element method(DEM).The representative volume elements consisting of ideal spheres and irregular clumps of different mass proportions are prepared to conduct drained triaxial compression simulations.A well-defined shape descriptor named OR is adopted to quantify particle shape differences of numerical samples at both form and roundness aspects,and the particle sliding friction coefficient varies from 0.001 to 1 to consider the surface roughness effect equivalently in *** stress-strain relationships as well as peak and critical friction angles of these assemblies are examined ***,contact network and anisotropic fabric characteristics within different granular assemblies are analyzed to explore the microscopic origins of the multi-scale shape-dependent shear *** study helps to improve the current understanding with respect to the influence of the particle shape on the shear behavior of sands from different shape aspects.

关键词： Discrete element method(DEM) Overall regularity(OR) Particle sliding friction Peak and critical friction angles Fabric anisotropy Dense sands

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Electroreduction of hexavalent chromium using a porous titanium flow-through electrode and intelligent prediction based on a back propagation neural network

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Frontiers of Environmental Science & engineering 2023年第8期17卷 69-79页

作者： Xinwan Zhang Guangyuan Meng Jinwen Hu Wanzi Xiao Tong Li Lehua Zhang Peng Chen National Engineering Laboratory for Industrial Wastewater Treatment School of Resources and Environmental EngineeringEast China University of Science and TechnologyShanghai 200237China Continuing Education Center Bozhou UniversityBozhou 236800China State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process East China University of Science and TechnologyShanghai 200237China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China

Flow-through electrodes have been demonstrated to be effective for electroreduction of Cr(VI),but shortcomings are tedious preparation and short ***,porous titanium available in the market was studied as a flow-through electrode for Cr(VI)*** addition,the intelligent prediction of electrolytic performance based on a back propagation neural network(BPNN)was *** studies revealed that Cr(VI)electroreduction was a diffusion-controlled *** of the flow-through mode achieved a high limiting diffusion current as a result of enhanced mass transfer and favorable *** of Cr(VI)in the flow-through system was 1.95 times higher than in a parallel-plate electrode *** the influent(initial pH 2.0 and 106 mg/L Cr(VI))was treated at 5.0 V and a flux of 51 L/(h·m2),a reduction efficiency of~99.9%was obtained without cyclic electrolysis *** served as the supporting electrolyte and pH regulator,as reactive CrSO72−species were formed as a result of feeding HSO4−.Cr(III)was confirmed as the final product due to the sequential three-electron transport or disproportionation of the *** developed BPNN model achieved good prediction accuracy with respect to Cr(VI)electroreduction with a high correlation coefficient(R2=0.943).Additionally,the electroreduction efficiencies for various operating inputs were predicted based on the BPNN model,which demonstrates the evolutionary role of intelligent systems in future electrochemical technologies.

关键词： Flow-through electrode Hexavalent chromium Heavy metals Neural network Artificial intelligence

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Brief review of hydrocarbon-reforming catalysts map for hydrogen production

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Energy Reviews 2023年第3期2卷 51-62页

作者： Qunwei Guo Jiaqi Geng Jiawen Pan Lu Zou Yunfeng Tian Bo Chi Jian Pu School of Materials Science and Engineering State Key Laboratory of Material Processing and Die&Mould TechnologyHuazhong University of Science&TechnologyWuhanHubei430074PR China Key Laboratory of Green Chemical Engineering Process of Ministry of Education School of Chemical Engineering and PharmacyWuhan Institute of TechnologyWuhanHubei430073PR China Jiangsu Key Laboratory of Coal-based Greenhouse Gas Control and Utilization School of Materials Science and PhysicsChina University of Mining and TechnologyXuzhou221116PR China

Hydrogen energy,the cleanest fuel,presents extensive applications in renewable energy technologies such as fuel ***,the transition process from carbon-based(fossil fuel)energy to desired hydrogen energy is usually hindered by inevitable scientific,technological,and economic obstacles,which mainly involves complex hydrocarbon reforming ***,this paper provides a systematic and comprehensive analysis focusing on the hydrocarbon reforming ***,recent related studies are summarized to clarify the intrinsic difference among the reforming *** to objectively assess the activated catalyst and deactivation mechanism,the rate-determining steps of reforming process have been emphasized,summarized,and ***,the effect of metals and supports on individual reaction processes is discussed followed by the metalsupport *** tendency and research map could be established to promote the technology development and expansion of hydrocarbon reforming *** review could be considered as the guideline for academics and industry designing appropriate catalysts.

关键词： Hydrogen production Reforming mechanism Metal-support interaction Metal catalysts Supports properties

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FedAWS: A Federated Tuning Approach with Adaptive Weight Shrinking for Pre-trained Foundation Models 13

FedAWS: A Federated Tuning Approach with Adaptive Weight Shr...

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13th IEEE Data Driven Control and Learning Systems Conference, DDCLS 2024

作者： Cheng, Yubin Song, Zhihuan Jiang, Xiaoyu Yao, Le Zhejiang University State Key Laboratory of Industrial Control Technology Institute of Industrial Process Control College of Control Science and Engineering Hangzhou310027 China School of Mathematics Hangzhou Normal University Hangzhou China

ISBN: (纸本)9798350361674

In recent years, pre-trained foundation models have developed rapidly and have been applied to various downstream tasks through fine-tuning methods. However, due to the existence of data silos, the lack of data for fine-tuning has become a vital issue preventing the application of the foundation model to industry. In addition, the high complexity of the network makes the foundation model prone to overfitting when used for data-constrained industrial tasks. Therefore, a federated tuning approach with adaptive weight shrinking, named FedAWS, is proposed for collaborative fine-tuning between factories. FedAWS adaptively selects the weight-shrinking factor to reduce overfitting and improve the generalization of the global model without relying on additional data sets or human experience. The case study on an industrial dataset demonstrates the effectiveness of FedAWS. This successful validation provides a new way for inter-factory collaboration to apply the foundation model to industry, thus facilitating the efficient utilization of industrial data. © 2024 IEEE.

关键词： Federated Learning Fine-tuning Foundation Model Weight Shrinking

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Antibiotic fermentation residue derived biochar supported cobalt ferrite as particle electrodes for peroxymonosulfate activation to complete mineralization gatifloxacin

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Journal of Industrial and engineering Chemistry 2025年 148卷 583-594页

作者： Zhang, Meng Liu, Yuxia Liu, Guanhong Ma, Wenxing Wang, Jun Liu, Lili State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process School of Resources and Environmental Engineering East China University of Science and Technology Shanghai200237 China Institute of Applied Ecology Chinese Academy of Sciences Shenyang110016 China Institute of Environmental Technology Technical University of Ostrava Ostrava-Poruba708 00 Czech Republic

In this study, antibiotic fermentation residues were pyrolyzed at low temperature to prepare biochar with low surface area and porosity, which was further used as carrier of cobalt ferrite to synthesize particle electrodes (BC@CF) for electrochemical system that adopted peroxymonosulfate (EC/BC@CF/PMS) to degrade gatifloxacin (GAT). Due to the electron transfer strengthening effect of BC and weak adsorption capacity of BC@CF, 100 % GAT degradation was achieved in EC/BC@CF/PMS system without electrolyte addition. The positively charged BC@CF could adsorb HSO5− and achieve its activation through electron transfer to produce surface-bound SO4[rad]− and [rad]OH, which were further transformed into O2[rad]− and mediate GAT degradation in reaction solution through PMS activation. The surface-bound SO4[rad]− and [rad]OH showed lower contribution to GAT degradation due to the electrostatic repulsive force between BC@CF and GAT. The complete mineralization of GAT in EC/BC@CF/PMS system was achieved by batch feeding of PMS (0, 30, and 60 min) and extension of experimental time (120 min), which was comparable in aspect of energy consumption (6.23 kWh/m3) with the reported electrochemical system that based on spinel or carbon-based particle electrodes, but featured with much higher mineralization efficiency of organic contaminant and complete detoxification of the wastewater. © 2025 The Korean Society of Industrial and engineering Chemistry

关键词： Degradation

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Efficient photodegradation of perfluoroalkyl substances under visible light by hexagonal ZnIn_(2)S_(4) nanosheets

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Journal of Environmental Sciences 2025年第2期148卷 116-125页

作者： Fuyu Liu Hui Xue Tingshuo Kang Qiupei Lei Jiazhe Chen Zhihong Zuo Bin Han Xize Lu Xiao Yang Xiangcheng Shan Xiaoyang Song Qingzhe Zhang Yongguang Yin Yong Cai Shandong Key Laboratory of Environmental Processes and Health Qingdao Key Laboratory of Marine Pollutant PreventionSchool of Environmental Science and EngineeringShandong UniversityQingdao 266237China Research Center for Particle Science and Technology Institute of Frontier and Interdisciplinary ScienceShandong UniversityQingdao 266237China Shenzhen Research Institute of Shandong University A301 Virtual University Park in South DistrictShenzhen 518057China State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 10085China Department of Chemistry and Biochemistry Florida International UniversityMiamiFlorida 33199USA

Perfluoroalkyl substances(PFASs)are typical persistent organic pollutants,and their removal is urgently required but *** has shown potential in PFASs degradation due to the redox capabilities of photoinduced charge carriers in ***,hexagonal ZnIn_(2)S_(4)(ZIS)nanosheets were synthesized by a one-pot oil bath method and were well characterized by a series of *** the degradation of sodium p-perfluorous nonenoxybenzenesulfonate(OBS),one kind of representative PFASs,the assynthesized ZIS showed activity superior to P25 TiO_(2) under both simulated sunlight and visible-light *** good photocatalytic performance was attributed to the enhanced light absorption and facilitated charge *** pH conditions were found crucial in the photocatalytic process by influencing the OBS adsorption on the ZIS *** e−and h+were the main active species involved in OBS degradation in the ZIS *** work confirmed the feasibility and could provide mechanistic insights into the degradation and defluorination of PFASs by visible-light photocatalysis.

关键词： PFASs Defluorination Photocatalysis Visible light ZnIn_(2)S_(4)

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Unlocking the multi-electron transfer reaction in NASICON-type cathode materials

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Materials Futures 2023年第2期2卷 109-122页

作者： Yuan Liu Xiaohui Rong Fei Xie Yaxiang Lu Junmei Zhao Liquan Chen Yong-Sheng Hu Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190People’s Republic of China College of Materials Science and Optoelectronic Technology University of Chinese Academy of SciencesBeijing 100049People’s Republic of China Yangtze River Delta Physics Research Center Co.Ltd Liyang 213300People’s Republic of China Huairou Division Institute of PhysicsChinese Academy of SciencesBeijing 101400People’s Republic of China CAS Key Laboratory of Green Process and Engineering State Key Laboratory of Biochemical EngineeringInstitute of Process EngineeringChinese Academy of SciencesBeijingPeople’s Republic of China

The growing concern about scarcity and large-scale applications of lithium resources has attracted efforts to realize cost-effective phosphate-based cathode materials for next-generation Na-ion batteries(NIBs).In previous work,a series of materials(such as Na_(4)Fe_(3)(PO_(4))_(2)(P_(2)O_(7)),Na_(3)VCr(PO_(4))_(3),Na_(4)VMn(PO_(4))3,Na_(3)MnTi(PO_(4))_(3),Na_(3)MnZr(PO_(4))3,etc)with∼120 mAh g^(-1) specific capacity and high operating potential has been ***,the mass ratio of the total transition metal in the above compounds is only∼22 wt%,which means that one-electron transfer for each transition metal shows a limited capacity(the mass ratio of Fe is 35.4 wt%in LiFePO_(4)).Therefore,a multi-electron transfer reaction is necessary to catch up to or go beyond the electrochemical performance of LiFePO_(4).This review summarizes the reported NASICON-type and other phosphate-based cathode *** the basis of the aforementioned experimental results,we pinpoint the multi-electron behavior of transition metals and shed light on designing rules for developing high-capacity cathodes in NIBs.

关键词： NASICON Na-ion batteries cathode materials multi-electron transfer reactions

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Laser-enhanced high-magnification telecentric imaging system for multiphase flow monitoring in membrane fouling

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Chinese Journal of Chemical engineering 2025年 82卷 25-38页

作者： Xu, Haohan Liang, Hu Feng, Xin Zhang, Weipeng Duan, Xiaoxia Chen, Jie Yang, Chao State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China School of Chemical Engineering University of Chinese Academy of Sciences Beijing100049 China

Membrane fouling is the primary resistance to the continuous production of stirred membrane reactors. This work presents a laser-enhanced high-magnification telecentric imaging system (LEHTIS), which uses a high-magnification telecentric lens and laser-enhanced illumination to invasively capture the motion of particles on the membrane surface or near the membrane. The problems of working distance and particle interference in the stirred membrane reactor are solved to achieve the purpose of in-situ monitoring of membrane fouling. This method is suitable for high flow rates, high solid holdup, and small particle size systems, and the dynamic motion and accumulation of particles are preliminarily analyzed. It shows that the accumulation and desorption of particles on the membrane surface are related to the physical properties of the membrane surface. There is an intermittent rotational movement in the flow field near the membrane, and it tends to stabilize over time. The filtration process can be assessed by monitoring changes in the overall velocity and acceleration of particles near the membrane. The analysis of forces acting on individual particles is compared and validated with the force balance model to correct and accurately apply it to stirred membrane reactors. The development of LEHTIS provides an effective tool for in-situ monitoring of membrane fouling and optimizing the stirred membrane reactors for industrial applications. © 2025 The Chemical Industry and engineering Society of China, and Chemical Industry Press Co., Ltd.

关键词： Chemical industry

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New formula for predicting the plastic buckling pressure of steel torispherical heads under internal pressure

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Journal of Zhejiang University-Science A(Applied Physics & engineering) 2024年第8期25卷 618-630页

作者： Sheng YE Keming LI Jinyang ZHENG Shan SUN Institute of Process Equipment Zhejiang UniversityHangzhou 310027China Engineering Research Center for High Pressure Process Equipment and Safety of Ministry of Education Hangzhou 310027China State Key Laboratory of Fluid Power and Mechatronic Systems Hangzhou 310058China

Thin-walled torispherical heads under internal pressure can fail by plastic buckling because of compressive circumferential stresses in the head ***,existing formulas still have limitations,such as complicated expressions and low accuracy,in determining buckling *** this paper,we propose a new formula for calculating the buckling pressure of torispherical heads based on elastic-plastic analysis and experimental ***,a finite element(FE)method based on the arc-length method is established to calculate the plastic buckling pressure of torispherical heads,considering the effects of material strain hardening and geometrical *** buckling pressure results calculated by the FE method in this paper have good consistency with those of BOSOR5,which is a program for calculating the elastic-plastic bifurcation buckling pressure based on the finite difference energy ***,the effects of geometric parameters,material parameters,and restraint form of head edge on buckling pressure are ***,a new formula for calculating plastic buckling pressure is developed by fitting the curve of FE results and introducing a reduction factor determined from experimental ***,based on the experimental results,we compare the predictions of the new formula with those of existing *** is shown that the new formula has a higher accuracy than the existing ones.

关键词： Torispherical head Plastic buckling Elastic-plastic analysis Prediction formula Finite element method

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Li intercalation in an MoSe_(2) electrocatalyst:In situ observation and modulation of its precisely controllable phase engineering for a high-performance flexible Li-S battery

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Carbon Energy 2023年第2期5卷 201-215页

作者： Yunke Wang Yige Zhao Kangli Liu Shaobin Wang Neng Li Guosheng Shao Feng Wang Peng Zhang State Center for International Cooperation on Designer Low-carbon&Environmental Materials(CDLCEM) Zhengzhou UniversityZhengzhouChina Zhengzhou Materials Genome Institute(ZMGI) XingyangZhengzhouChina School of Chemical Engineering and Advanced Materials The University of AdelaideAdelaideSouth AustraliaAustralia State Key Laboratory of Silicate Materials for Architecture Wuhan University of TechnologyWuhanChina Beijing Key Laboratory of Electrochemical Process and Technology for Materials Beijing University of Chemical TechnologyBeijingChina

Sophisticated efficient electrocatalysts are essential to rectifying the shuttle effect and realizing the high performance of flexible lithium-sulfur batteries(LSBs).Phase transformation of MoSe_(2) from the 2H phase to the 1T phase has been proven to be a significant method to improve the catalytic ***,precisely controllable phase engineering of MoSe_(2) has rarely been ***,by in situ Li ions intercalation in MoSe_(2),a precisely controllable phase evolution from 2H-MoSe_(2) to 1T-MoSe_(2) was *** importantly,the definite functional relationship between cut-off voltage and phase structure was first identified for phase engineering through in situ observation and modulation *** sulfur host(CNFs/1T-MoSe_(2))presents high charge density,strong polysulfides adsorption,and catalytic ***,Li-S cells based on it display capacity retention of 875.3mAh g^(-1) after 500 cycles at 1 C and an areal capacity of 8.71mAh cm^(-2) even at a high sulfur loading of 8.47mg cm^(-2).Furthermore,the flexible pouch cell exhibiting decent performance will endow a promising potential in the wearable energy storage *** study proposes an effective strategy to precisely control the phase structure of MoSe_(2),which may provide the reference to fabricate the highly efficient electrocatalysts for LSBs and other energy systems.

关键词： electrocatalysts electrospinning Li intercalation lithium-sulfur batteries phase engineering

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