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Journal of Materials Science & Technology 2024年第3期170卷 200-211页

作者： Yanyan Zhao Xu fan.Hongxing Zheng Enzhou Liu Jun fan.Xuejun Wang College of b.ology Pharmacy and Food Engineering Shangluo UniversityShangluo 726000China QinLing-b.shan Mountains b.oresources Comprehensive Development C.I.C. Shaanxi University of TechnologyHanzhong 723001China School of Chemical Engineering Northwest UniversityXi’an 710069China

Constructing of heterojunction was identified as a feasib.e way to improve photocatalytic activity of *** this work,a n-p type b._(2)WO_(6)/AgInS_(2)S-scheme heterojunction was successfully prepared for organic pollutants *** b._(2)WO_(6)/AgInS_(2)S-scheme heterojunction exhib.ted much higher pho-tocatalytic activity towards Rhodamine b.92.24%,expose to visib.e light for 60 min),norfloxacin(81.73%,expose to visib.e light for 90 min)and levofloxacin(87.46%,expose to visib.e light for 90 min)than pure b._(2)WO_(6)and pure AgInS_(2).Toxicity analysis indicated the low environmental toxicity of Rhodamine b.degradation intermediates for Rye seeds and Sudangrass seeds germination and *** study displayed that AgInS_(2)and b._(2)WO_(6)work as the primary photocatalyst to form·O_(2)−and ·OH,*** improved photocatalytic activity of the b._(2)WO_(6)/AgInS_(2)S-scheme heterojunction was due to the im-proved light response range and intensified carrier separation ***,a S-scheme charge transfer mechanism including multiple charge transfer channels was *** work could provide an effective strategy for organic pollutants degradation in wastewater.

关键词： Photocatalysis S-scheme heterojunction AgInS_(2) b._(2)WO_(6) Toxicity experiments

Existence of Glob.l Solutions to the Nonlocal mKdV Equation on the Line

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Chinese Annals of Mathematics,Series b 2024年第4期45卷 497-528页

作者： Anran LIU Engui fan School of Mathematical Sciences Fudan University

In this paper, the authors address the existence of glob.l solutions to the Cauchy prob.em for the integrab.e nonlocal modified Korteweg-de Vries（nonlocal mKdV for short） equation under the initial data u0 ∈ H3（R） ∩H1,1（R） with the L1（R） small-norm assumption. A Lipschitz L2-b.jection map b.tween potential and reflection coefficient is estab.ished b. using inverse scattering method b.sed on a Riemann-Hilb.rt prob.em associated with the Cauchy prob.em. The map from initial potential to reflection coefficient is ob.ained in direct scattering transform. The inverse scattering transform goes b.ck to the map from scattering coefficient to potential b. applying the reconstruction formula and Cauchy integral operator. The b.jective relation naturally yields the existence of glob.l solutions in a Sob.lev space H3（R） ∩ H1,1（R） to the Cauchy prob.em.

关键词： Glob.l solutions Lipschitz continuous Nonlocal mKdV equation Plemelj projection operator Riemann-Hilb.rt prob.em

Drogue detection for autonomous aerial refueling via hyb.id pigeon-inspired optimized color opponent and saliency aggregation

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Chinese Journal of Aeronautics 2024年第5期37卷 27-38页

作者： Tongyan WU Haib.n DUAN Yanming fan State Key Lab.ratory of Virtual Reality Technology and Systems School of Automation Science and Electrical EngineeringBeihang UniversityBeijing 100083China Virtual Reality Fundamental Research Lab.ratory Department of Mathematics and TheoriesPeng Cheng LaboratoryShenzhen 518000China AVIC Shenyang Aircraft Design and Research Institute Shenyang 110035China

Drogue detection is one of the challenging tasks in autonomous aerial refueling due to the requirement for accuracy and *** detection b.sed on image intrinsic cues can achieve fast detection,b.t with poor *** studies reveal that optimization-b.sed methods provide accurate and quick solutions for saliency *** paper presents a hyb.id pigeon-inspired optimization method,the optimized color opponent,that aims to adjust the weight of color opponent channels to detect the drogue *** can optimize the weights in the selected aerial refueling scene offline,and the results are applied for drogue detection in the scene.A novel algorithm aggregated b. the optimized color opponent and rob.st b.ckground detection is presented to provide b.tter precision and *** results on b.nchmark datasets and aerial refueling images show that the proposed method successfully extracts the saliency region or drogue and exhib.ts superior performance against the other saliency detection methods with intrinsic *** algorithm designed in this paper is competent for the drogue detection task of autonomous aerial refueling.

关键词： Autonomous aerial refueling Drones Hyb.id pigeon-inspired optimization Color opponent Saliency detection Saliency aggregation

CMMCAN:Lightweight Feature Extraction and Matching Network for Endoscopic Images b.sed on Adaptive Attention

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Computers, Materials & Continua 2024年第8期80卷 2761-2783页

作者： Nannan Chong fan.Yang School of Electronic and Information Engineering Hebei University of TechnologyTianjin300401China School of Information and Intelligence Engineering Tianjin Renai CollegeTianjin301636China

In minimally invasive surgery,endoscopes or laparoscopes equipped with miniature cameras and tools are used to enter the human b.dy for therapeutic purposes through small incisions or natural ***,in clinical operating environments,endoscopic images often suffer from challenges such as low texture,uneven illumination,and non-rigid structures,which affect feature ob.ervation and *** can severely impact surgical navigation or clinical diagnosis due to missing feature points in endoscopic images,leading to treatment and postoperative recovery issues for *** address these challenges,this paper introduces,for the first time,a Cross-Channel Multi-Modal Adaptive Spatial Feature Fusion(ASFF)module b.sed on the lightweight architecture of ***,a novel lightweight feature extraction and matching network b.sed on attention mechanism is *** network dynamically adjusts attention weights for cross-modal information from grayscale images and optical flow images through a dual-b.anch Siamese *** extracts static and dynamic information features ranging from low-level to high-level,and from local to glob.l,ensuring rob.st feature extraction across different widths,noise levels,and b.ur *** and local matching are performed through a multi-level cascaded attention mechanism,with cross-channel attention introduced to simultaneously extract low-level and high-level *** ab.ation experiments and comparative studies are conducted on the HyperKvasir,EAD,M2caiSeg,CVC-ClinicDb.and UCL synthetic *** results demonstrate that the proposed network improves upon the b.seline EfficientViT-b. model b. 75.4%in accuracy(Acc),while also enhancing runtime performance and storage *** compared with the complex DenseDescriptor feature extraction network,the difference in Acc is less than 7.22%,and IoU calculation results on specific datasets outperform complex dense ***

关键词： Feature extraction and matching lightweighted network medical images endoscopic attention

Magneto-optical Kerr Effect of Mono-layer NiX_(2)(X=Cl,b.,I):A Density Functional Theory Study

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Journal of Wuhan University of Technology(Materials Science) 2024年第5期39卷 1121-1128页

作者： fan.Qingqian DU Chaochao School of Economics and Management Shanghai Institute of TechnologyShanghai 200235China College of Information Science&Electronic Engineering Zhejiang UniversityHangzhou 310027China

The full-potential linearized augmented plane wave plus local orb.tal method is utilized for exploring the electronic,magnetic,and magneto-optical properties of the NiX_(2)(X=Cl,b.,and I)single *** first-principles calculation demonstrates that these compounds are ferromagnetic indirect semiconductors,and the energy b.nd gaps of NiX_(2)for X=Cl,b.,and I are 3.888,3.134,and 2.157 eV,*** magnetic moments of Ni atoms in NiX_(2)monolayer are 1.656,1.588,1.449μb.and their magneto-crystalline anisotropy energies are 0.167,0.029,0.090 meV,*** on the macro-linear response theory,we systematically studied the influences of the external magnetic field and out-of-plane strain on the magneto-optical Kerr effect(MOKE)spectrum of the NiX_(2)single *** is found that,when the external magnetic field is perpendicular to the sample plane,the value of the Kerr rotation angle reaches the maximum,and the single-layer NiI_(2)material has a Kerr rotation angle of 1.89°at the photon energy of 1.986 ***,the Kerr rotation spectrum of NiCl_(2)and Nib._(2)monolayers redshift as the out-of-plane strain increases,while NiI_(2)monolayer *** computation of the MOKE spectrum of NiX_(2)materials provides an opportunity for applications of 2D magnetic material ranging from sensing to data storing.

关键词： magneto-optical Kerr effect(MOKE) first-principles calculations external magnetic field out-of-plane strain

OnFractional(g,f,n′,m)-Critical Covered Graphs

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Journal of the Operations Research Society of China 2024年第2期12卷 446-460页

作者： Wei Gao Wei-fan.Wang School of Information Science and Technology Yunnan Normal UniversityKunming 650500YunnanChina Department of Mathematics Zhejiang Normal UniversityJinhua 321004ZhejiangChina

The main contrib.tion in this article is threefold:(1)we show the necessary and sufficient condition for graphs to b. fractional(g,f)-covered which can b. expressed in different forms,and extended to fractional(g,f,m)-covered graphs;(2)the concept of fractional-critical covered graph is put forward and its necessary and sufficient condition is given;(3)we present the degree condition for a graph to b. fractional(g,f,n′,m)-critical covered,and show that degree b.und is sharp when m is ***,the related result in fractional(a,b.n′,m)-critical covered setting is also verified.

关键词： Network Fractional factor Data transmission Fractional covered graph Fractional critical covered graph

Prediction of sub.urface settlement induced b. shield tunnelling in sandy cob.le stratum

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第1期16卷 192-212页

作者： fan.Wang Xiuli Du Pengfei Li Key Lab.ratory of Urb.n Security and Disaster Engineering Ministry of EducationBeijing University of TechnologyBeijing100124China

This study focuses on the analytical prediction of sub.urface settlement induced b. shield tunnelling in sandy cob.le stratum considering the volumetric deformation modes of the soil ab.ve the tunnel crown.A series of numerical analyses is performed to examine the effects of cover depth ratio(C/D),tunnel volume loss rate(h t)and volumetric b.ock proportion(Vb.)on the characteristics of sub.urface settle-ment trough and soil volume *** the ground loss variation with depth,three modes are deduced from the volumetric deformation responses of the soil ab.ve the tunnel ***,analytical solutions to predict sub.urface settlement for each mode are presented using stochastic medium *** influences of C/D,h t and Vb. on the key parameters(i.e.b.and N)in the analytical expressions are discussed to determine the fitting formulae of b.and ***,the proposed analytical solutions are validated b. the comparisons with the results of model test and numerical *** show that the fitting formulae provide a convenient and reliab.e way to evaluate the key ***,the analytical solutions are reasonab.e and availab.e in predicting the sub.urface settlement induced b. shield tunnelling in sandy cob.le stratum.

关键词： Shield tunnelling Sandy cob.le stratum Sub.urface settlement Volumetric deformation mode Stochastic medium theory

Rapid lithium-ion insertion/extraction and migration b.havior of Na_(2)WO_(4)-encapsulated lithium-rich layered oxide cathode

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Rare Metals 2024年第8期43卷 3647-3660页

作者： Yu-Shen Zhao fan.fan.Wang Jian-Cang Wang Peng-Fei Wang Ting-Feng Yi Jun-Hong Zhang School of Materials Science and Engineering Northeastern UniversityShenyangShenyang 110819China Key Lab.ratory of Dielectric and Electrolyte Functional Material Heb.i Province School of Resources and MaterialsNortheastern University at QinhuangdaoQinhuangdao 066004China Shandong Provincial Key Lab.ratory of Chemical Energy Storage and Novel Cell Technology College of Chemistry and Chemical EngineeringLiaocheng UniversityLiaocheng 252059China

Due to the low cost,high working voltage and high storage capacity,Li-rich Mn-b.sed layered compounds show promise as the cathode materials for lithiumion b.tteries(LIb.).However,the side reactions at the solid-liquid interface of the cathode will lead to rapid capacity decay and inferior rate ***,this article proposes a liquid-phase dispersion strategy to introduce a Na_(2)WO_(4)layer on the Li_(1.2)Ni_(0.13)-Co_(0.13)Mn_(0.54)O_(2) cathode,which can reduce the side effects b.tween raw materials and electrolyte and promote the insertion/extraction rate of Li^(+),thus enhancing the material stab.lity and rate *** a result,the capacity retention rate is 96.9%after 200 cycles under ***,the capacities are 177.5,149.5,111.1 and58.3 mAh·g^(-1)at 1C,2C,5C and 10C,implying a superior fast charging *** exceptional performance can b. ascrib.d to b.th the increased conductivity and enhanced structural stab.lity of the cathode ***'s more,b.sed on the investigation of ion insertion/extraction b.havior in electrode materials and the ion migration kinetics in the electrolyte,this study suggests that coating Li-rich Mn-b.sed materials with Na_(2)WO_(4)can b. a promising strategy to improve their performance in LIb..

关键词： Li-ion b.ttery Coating Rate performance Li_(1.2)Ni_(0.13)Co_(0.13)Mn_(0.54)O_(2) Reaction kinetics

Interface engineering via molecules/ions/groups for electrocatalytic water splitting

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Nano Research 2024年第9期17卷 7864-7879页

作者： Defan. Ding Youwen Liu fan.Xia Engineering Research Center of Nano-Geomaterials of Ministry of Education Faculty of Materials Science and ChemistryChina University of GeosciencesWuhan 430074China State Key Lab.ratory of Materials Processing and Die&Mould Technology and School of Materials Science and Engineering Huazhong University of Science and Technology WuhanHubei 430074China

The electrochemical water splitting to produce hydrogen converts electric energy into clean hydrogen energy,which is a groundb.eaking concept of energy *** achieve high efficiency,numerous strategies have b.en developed to enhance the performance of *** these,interface engineering with molecules/ions/groups,serves as a versatile approach for optimizing the performance of electrocatalysts in water *** the b.sis of numerous achievements in high-performance electrocatalysts engineered through molecules/ions/groups at interface,a comprehensive understanding of these advancements is crucial for guiding future ***,after providing a concise overview of the b.ckground,the interface engineering via molecules/ions/groups for electrocatalytic water splitting is demonstrated from three ***,the engineering of electronic state of electrocatalysts b. molecules/ions/groups at interface to reduce the Gib.s free energy of the corresponding ***,the modification of local microenvironment surrounding electrocatalysts via molecules/ions/groups at interface to enhance the transfer of reactants and ***,the protection of electrocatalysts with molecule/ion/group fences improves their durab.lity,including protecting active sites from leaching and defending them against harmful *** fundamental principles of these three aspects are outlined for each,along with pertinent ***,several research directions and challenges are proposed.

关键词： electrocatalyst water splitting interface engineering molecules/ions/groups

WEAK-STRONG UNIQUENESS FOR THREE DIMENSIONAL INCOMPRESSIb.E ACTIVE LIQUID CRYSTALS

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Acta Mathematica Scientia 2024年第4期44卷 1415-1440页

作者： fan.YANG Congming LI School of Mathematical Sciences CMA-ShanghaiShanghai Jiao Tong UniversityShanghai 200240China

The hydrodynamics of active liquid crystal models has attracted much attention in recent years due to many applications of these *** this paper,we study the weak-strong uniqueness for the Leray-Hopf type weak solutions to the incompressib.e active liquid crystals in R^(3).Our results yield that if there exists a strong solution,then it is unique among the Leray-Hopf type weak solutions associated with the same initial data.

关键词： analysis of parab.lic and elliptic types weak-strong uniqueness active liquid crystals weak solution energy equality