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Multifunctional Film Assembled from N‑Doped Carbon Nanofiber with Co–N_(4)–O single Atoms for Highly Efficient Electromagnetic Energy Attenuation

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Nano-Micro Letters 2024年第11期16卷 359-376页

作者： Jia Xu Bei Li Zheng Ma Xiao Zhang Chunling Zhu Feng Yan Piaoping Yang Yujin Chen College of Materials science and Chemical engineering Harbin Engineering UniversityHarbin 150001People’s Republic of China Key Laboratory of In‑Fiber Integrated Optics College of Physics and Optoelectronic EngineeringHarbin Engineering UniversityHarbin 150001People’s Republic of China

single-atom materials have demonstrated attractive physicochemical ***,unders.a.ding the relationships between the coordination environment of single atoms.a.d their properties.a. the atomic level remains.a.considerable ***,a facile waterassisted carbonization approach is developed to fabricate well-defined asymmetrically coordinated Co–N_(4)–O sites on biomass-derived carbon nanofiber(Co–N_(4)–O/NCF)for electromagnetic wave(EMW)*** such nanofiber,one atomically dispersed Co site is coordinated with four N atoms in the graphene basal plane and one oxygen atom in the axial ***-depth experimental and theoretical studies reveal that the axial Co–O coordination breaks the charge distribution symmetry in the planar porphyrin-like Co–N_(4) structure,leading to significantly enhanced dielectric polarization loss relevant to the planar Co–N_(4) ***,the film based on Co–N_(4)–O/NCF exhibits light weight,flexibility,excellent mechanical properties,great thermal insulating feature,and excellent EMW absorption with a reflection loss of−45.82 dB along with an effective absorption bandwidth of 4.8 *** findings of this work offer insight into the relationships between the single-atom coordination environment and the dielectric performance,and the proposed strategy can be extended toward the engineering of asymmetrically coordinated single atoms for various.a.plications.

关键词： Co single atoms Asymmetric coordination structure Axial oxygen coordination Electromagnetic wave absorption Multifunctional film

Determination of critical s.a.e line(CsL)for silty-sandy iron ore tailings subjected to low-high confining pressures

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Journal of Rock Mechanics.a.d Geotechnical engineering 2024年第5期16卷 1684-1695页

作者： Nilo Cesar Consoli João Vítor de Azambuja Carvalho Alexia Cindy Wagner Hugo Carlos scheuermann Filho Inácio Carvalho Pedro Pazzoto Cacciari João Paulo de sousa silva Civil engineering Universidade Federal do Rio Grande do SulPorto AlegreRS90035-190Brazil Exploration and Mineral Projects-Mineral Development Centre VALE S.A.Santa LuziaMG33040-900Brazil Department of Civil Geological and Mining EngineeringPolytechnique MontrealQuebecH3C 3A7Canada

The disposal of filtered tailings in high dry s.a.ks can induce particle breakage,changing the material's behaviour during the structure's *** grading changes influence material properties.a. the critical s.a.e,and this is not mature for intermediate artificial soils(tailings)in a broad range of confining *** this paper,it aims to describe the behaviour of iron ore tailings in a spectrum of confining pressures broader than the reported in previous studies.a.series of consolidated drained(CD)triaxial tests was carried out with confining pressures ranging from 0.075 MPa to 120 *** results show that the amount of breakage plays.a. essential role in the response of iron ore *** existence of curved critical s.a.e line(CsL)in both specific volume(ν)-logarithm of mean effective stress(p′)and deviatoric stress(q)-mean effective stress(p′)planes.a.d different responses in the deviatoric stress.a.ial strain-volumetric strain curves were *** inverse s-s.a.ed equation was proposed to represent the silty-sandy tailings'behaviour up to high pressures onν-lnp′*** proposed equation provides.a.basis for enhancing constitutive models.a.d considers the evolution of the grading up to severe loading *** adjustment considered three regions with different responses.a.sociated with particle breakage at different pressure levels.

关键词： Tailings Iron ore tailings dry s.a.king silty-sandy material Critical s.a.e soil mechanics High confining pressures Particle breakage

Comparison of the effect of different external electrodes on discharge plas.a.assisted diffusion flame s.a.ilization

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Plas.a.science and Technology 2024年第10期26卷 123-132页

作者： siyin ZHOU Xiang LIU Wansheng NIE shuhui YUAN s.a.e engineering University Beijing 101416People’s Republic of China

To optimize the design of plas.a.injectors,the influence of different external electrodes on plas.a.assisted flame s.a.ilization was.a.sessed by using a nonequilibrium plas.a.injector flame control *** electrical characteristics of the injector,flame structure parameters,flame intensity,discharge power,and cost-to-effectiveness ratio under different external electrodes(four mesh electrodes.a.d one copper foil electrode)were analyzed using electrical and optical *** results show that reducing the mesh size of the external electrode leads to a decrease in breakdown *** with a ceramic dielectric barrier-based injector,an injector with a quartz dielectric barrier produces.a.higher breakdown voltage under the same *** the same actuation voltage,the discharge current increases.a. the mesh size of the external electrode decreases.a.d combustion is enhanced by the discharge plas.a.therefore,it is better to adopt a s.a.ler mesh hole size to realize good flame s.a.ilization under a lower actuation ***,under the studied working conditions,reducing the mesh hole size of the external electrode increases the cost-to-effectiveness ratio of plas.a.injector-based flame ***,considering the cost-to-effectiveness ratio and the weight of the injector,an external electrode with a larger mesh hole size should be chosen,which contradicts the above rule.

关键词： flame s.a.ilization alternating current driven dielectric barrier discharge plas.a.injector plas.a.assisted combustion external electrode

A Model for Detecting Fake News by Integrating Domain-specific Emotional and semantic Features

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Computers, Materials & Continua 2024年第8期80卷 2161-2179页

作者： Wen Jiang Mingshu Zhang Xu’an Wang Wei Bin Xiong Zhang Kelan Ren Facheng Yan College of Cryptography engineering Engineering University of People’s Armed PoliceXi’an710086China Key Laboratory of Network and Information security Engineering University of People’s Armed PoliceXi’an710086China Key Laboratory of CTC&Information engineering Engineering University of People’s Armed PoliceMinistry of EducationXi’an710086China

With the rapid spread of Internet information and the spread of fake news,the detection of fake news becomes more and more *** detection methods often rely on a single emotional or semantic feature to identify fake news,but these methods have limitations when dealing with news in specific *** order to solve the problem of weak feature correlation between data from different domains.a.model for detecting fake news by integrating domain-specific emotional and semantic features is *** method makes full use of the attention mechanism,grasps the correlation between different features.a.d effectively improves the effect of feature *** algorithm first extracts the semantic features of news text through the Bi-LsTM(Bidirectional Long short-Term Memory)layer to capture the contextual relevance of news ***-BiLsTM is then used to extract emotional features.a.d predict the probability of positive and negative emotions in the *** then uses domain features.a. an enhancement feature and attention mechanism to fully capture more fine-grained emotional features.a.sociated with that ***,the fusion features.a.e taken as the input of the fake news detection classifier,combined with the multi-task representation of information,and the MLP and softmax functions.a.e used for *** experimental results show that on the Chinese dataset Weibo21,the F1 value of this model is 0.958,4.9% higher than that of the sub-optimal model;on the English dataset FakeNewsNet,the F1 value of the detection result of this model is 0.845,1.8% higher than that of the sub-optimal model,which is.a.vanced and feasible.

关键词： Fake news detection domain-related emotional features semantic features feature fusion

Performance-control-orientated hybrid metal additive manufacturing technologies:s.a.e of the art,challenges.a.d future trends

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International Journal of Extreme Manufacturing 2024年第3期6卷 274-328页

作者： Jiming Lv Yuchen Liang Xiang Xu Gang Xu Hongmei Zhang Haifei Lu Kaiyu Luo Jie Cai Jinzhong Lu school of Mechanical engineering Jiangsu UniversityZhenjiang 212013People’s Republic of China school of Mechanical engineering Jiangsu University of Science and TechnologyZhenjiang 212003People’s Republic of China

Metal additive manufacturing(AM)technologies have made significant progress in the basic theoretical field since their invention in the ***,performance ins.a.ility during continuous processing,such as thermal history,residual stress.a.cumulation,and columnar grain epitaxial growth,consistently hinders their broad application in s.a.dardized industrial *** overcome these challenges,performance-control-oriented hybrid AM(HAM)technologies have been *** technologies,by leveraging external auxiliary processes.a.m to regulate microstructural evolution and mechanical properties during metal *** paper provides.a.systematic and detailed review of performance-control-oriented HAM technology,which is categorized into two main groups:energy field-assisted AM(EFed AM,***,electromagnetic,and heat)technologies.a.d interlayer plastic deformation-assisted AM(IPDed AM,*** shock peening,rolling,ultrasonic peening,and friction stir process)*** review covers the influence of external energy fields on the melting,flow,and solidification behavior of materials.a.d the regulatory effects of interlayer plastic deformation on grain refinement,nucleation,and ***,the role of performance-control-oriented HAM technologies in managing residual stress conversion,metallurgical defect closure,mechanical property improvement,and anisotropy regulation is thoroughly reviewed and *** review concludes with an analysis of future development trends in EFed AM and IPDed AM technologies.

关键词： hybrid additive manufacturing in-situ/interlayer plastic deformation auxiliary energy fields microstructure customization mechanical properties enhancement

12.6μm-Thick Asymmetric Composite Electrolyte with superior Interfacial s.a.ility for solid-s.a.e Lithium-Metal Batteries

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Nano-Micro Letters 2024年第9期16卷 397-409页

作者： Zheng Zhang Jingren Gou Kaixuan Cui Xin Zhang Yujian Yao suqing Wang Haihui Wang Beijing Key Laboratory for Membrane Materials.a.d engineering Department of Chemical EngineeringTsinghua UniversityBeijing 100084People’s Republic of China school of Chemistry and Chemical engineering South China University of TechnologyGuangzhou 510000People’s Republic of China

solid-s.a.e lithium metal batteries(ssLMBs)show great promise in terms of high-energy-density and high-safety ***,there is.a. urgent need to address the compatibility of electrolytes with high-voltage cathodes/Li anodes.a.d to minimize the electrolyte thickness to achieve highenergy-density of ***,we develop an ultrathin(12.6μm)asymmetric composite solid-s.a.e electrolyte with ultralight areal density(1.69 mg cm^(−2))for *** electrolyte combining a garnet(LLZO)layer and a metal organic framework(MOF)layer,which are fabricated on both sides of the polyethylene(PE)separator separately by tape *** PE separator endows the electrolyte with flexibility and excellent mechanical *** LLZO layer on the cathode side ensures high chemical s.a.ility at high *** MOF layer on the anode side achieves.a.s.a.le electric field and uniform Li flux,thus promoting uniform Li^(+)*** to the well-designed structure,the Li symmetric battery exhibits.a. ultralong cycle life(5000 h),and high-voltage ssLMBs.a.hieve s.a.le cycle *** assembled pouch cells provided a gravimetric/volume energy density of 344.0 Wh kg^(−1)/773.1 Wh L^(−1).This simple operation allows for large-s.a.e preparation,and the design concept of ultrathin asymmetric structure also reveals the future development direction of ssLMBs.

关键词： solid-s.a.e lithium metal batteries Composite solid-s.a.e electrolyte Ultrathin asymmetric structure Pouch cells

Review of Fault-tolerant Control for Motor Inverter Failure with Operational Quality Considered

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CEs Transactions on Electrical Machines.a.d systems 2024年第2期8卷 202-215页

作者： Yuxuan Du Wenxiang Zhao Yihua Hu Jinghua Ji Tao Tao IEEE school of Electrical and Information engineering Jiangsu University Department of engineering King’s College London

In recent years,motor drive systems have garnered increasing attention due to their high efficiency and superior control *** is especially apparent in aeros.a.e,marine propulsion,and electric vehicles,where high performance,efficiency,and reliability are *** ability of the drive system to maintain long-term fault-tolerant control(FTC)operation after a failure is *** likelihood of inverter failures surpasses that of other components in the drive system,highlighting its critical ***-term FTC operation ensures the system retains its fundamental functions until safe repairs or replacements can be *** focus of developing a FTC strategy has shifted from basic FTC operations to enhancing the post-fault quality to accommodate the realities of prolonged operation *** paper primarily investigates FTC strategies for inverter failures in various motor drive systems over the past *** strategies.a.e categorized into three types based on post-fault operational quality:rescue,remedy,and *** paper discusses each typical control strategy and its res.a.ch focus,the strengths.a.d weaknesses of various.a.gorithms.a.d recent advancements in ***,this review summarizes effective FTC techniques for inverter failures in motor drive systems.a.d suggests directions for future res.a.ch.

关键词： Fault-tolerant Motor drive Operation quality Inverter failure

Model-driven path planning for robotic plas.a.cutting of branch pipe with single Y-groove based on pipe-rotating scheme

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Advances in Manufacturing 2024年第1期12卷 94-107页

作者： Yan Liu Qiu Tang Xin-Cheng Tian school of Control science and engineering Shandong UniversityJinan250061People’s Republic of China engineering Res.a.ch Center of Intelligent Unmanned system Ministry of EducationJinan250061People’s Republic of China school of Mechanical and Electronic engineering Shandong Jianzhu UniversityJinan250101People’s Republic of China

The automatic cutting of intersecting pipes is.a.challenging task in *** improved automation and accuracy,this paper proposes.a.model-driven path planning approach for the robotic plas.a.cutting of a branch pipe with a single ***,it summarizes the intersection forms.a.d introduces.a.dual-pipe intersection *** on this model,the moving three-plane structure(a description unit of the geometric characteristics of the intersecting curve)is constructed,and a geometric model of the branch pipe with a single Y-groove is ***,a novel mathematical model for plas.a.radius.a.d taper compensation is ***,the compensation model and groove model are integrated by es.a.lishing movable ***,to prevent collisions between the plas.a.torch and workpiece,the torch height is planned and a branch pipe-rotating scheme is *** the es.a.lished models.a.d moving frames,the planned path description of cutting robot is provided in this novel *** accuracy of the proposed method is verified by simulations.a.d robotic cutting experiments.

关键词： Automatic groove cutting of intersecting pipes Model-driven robot path planning Plas.a.beam radius.a.d taper compensation

Efficient simultaneous removal of diesel particulate matter and hydrocarbons from diesel exhaust gas.a. low temperatures over Cu–CeO_(2)/Al_(2)O_(3) coupling with dielectric barrier discharge plasma

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Plas.a.science and Technology 2024年第5期26卷 100-109页

作者：任保勇方世玉张甜甜孙燕高尔豪李晶吴祖良朱佳丽王伟姚水良 school of safety science and engineering Changzhou UniversityChangzhou 213164People’s Republic of China school of Environmental science and engineering Changzhou UniversityChangzhou 213164People’s Republic of China Key Laboratory of Advanced Plas.a.Catalysis engineering for China Petrochemical Industry Changzhou 213164People’s Republic of China

Diesel particulate matter(DPM)and hydrocarbons(HCs)emitted from diesel engines have a negative affect on air quality and human *** for oxidative removal of DPM and HCs.a.e currently used universally but their low removal efficiency at low temperatures is.a.*** this study,Cu-doped CeO_(2) loaded on Al_(2)O_(3) coupled with plas.a.was used to enhance low-temperature oxidation of DPM and *** of DPM and HCs.a. 200℃ using the catalyst were as high as 90%with plas.a.but below 30%without *** plas.a.diffuse reflectance infrared Fourier transform spectroscopy coupled with mass spectrometry was conducted to reveal the functional mechanism of the oxygen species in the DPM oxidation *** was found that Cu-CeO_(2) can promote the formation of adsorbed oxygen(M^(+)-O_(2)^(-))and terminal oxygen(M=O),which can react with DPM to form carbonates that are easily converted to gaseous CO_(2).Our results provide a practical plas.a.catalysis technology to obtain simultaneous removals of DPM and HCs.a. low temperatures.M+O-2Diesel particulate matter(DPM)and hydrocarbons(HCs)emitted from diesel engines have a negative affect on air quality and human *** for oxidative removal of DPM and HCs.a.e currently used universally but their low removal efficiency at low temperatures is.a.*** this study,Cu-doped CeO_(2) loaded on Al_(2)O_(3) coupled with plas.a.was used to enhance low-temperature oxidation of DPM and *** of DPM and HCs.a. 200°C using the catalyst were as high as 90%with plas.a.but below 30%without *** plas.a.diffuse reflectance infrared Fourier transform spectroscopy coupled with mass spectrometry was conducted to reveal the functional mechanism of the oxygen species in the DPM oxidation *** was found that Cu–CeO_(2) can promote the formation of adsorbed oxygen(–)and terminal oxygen(M=O),which can react with DPM to form carbonates that are easily converted to gaseous CO_(2).Our results provi

关键词： diesel PM plas.a.catalysis Cu-CeO_(2)/Al_(2)O_(3) DRIFTs-Ms synergy effect