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Seasonal contrasts in recent Arctic warming processes: surface air temperature versus surface temperature 认领 引用 被引量：1
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作者 CAI Ziyi WU Fangying +3 位作者 OUYANG Huiling YOU Qinglong Sergey K.GULEV Seok-Woo SON 《Advances in Polar Science》 CSCD 2026年第2期182-199,共18页
Arctic warming has been widely documented, yet the relative contributions of processes controlling surface air temperature(SAT) and surface temperature(ST) warming remain insufficiently quantified, particularly betwee... Arctic warming has been widely documented, yet the relative contributions of processes controlling surface air temperature(SAT) and surface temperature(ST) warming remain insufficiently quantified, particularly between warm and cold seasons. Here, we use multiple reanalysis datasets to quantify Arctic SAT and ST warming from 1979 to 2021 through thermodynamic and surface energy budget analyses, with a focus on the seasonal contrast between warm season and cold season. We show that SAT warming in both seasons is primarily linked to an increase in the diabatic heating residual associated with surface warming, whereas cold season SAT warming is additionally enhanced by strengthened warm advection, which accounts for 33% of the total SAT increase. ST warming exhibits a stronger seasonal contrast. In the warm season, ST warming is driven jointly by enhanced downward longwave radiation, mainly associated with increased atmospheric water vapor, and sea ice albedo feedback, contributing 27% and 33% of the ST increase, respectively. In the cold season, ST warming is dominated by enhanced downward longwave radiation, with atmospheric water vapor, mid-level cloud cover, and a residual term mainly related to external greenhouse gas forcing contributing 36%, 16%, and 10%, respectively. The Arctic Ocean further modulates this seasonality by absorbing heat in the warm season and releasing it in the cold season, contributing 21% to cold season ST warming and providing an additional heat source for the lower atmosphere. These results demonstrate that recent Arctic warming cannot be interpreted from SAT or ST alone, but reflects seasonally distinct coupling among atmospheric heat transport, radiative feedbacks, sea ice loss, and ocean heat storage and release. 展开更多
关键词 Arctic warming process quantitative contribution surface energy budget
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Depression induces ocular surface inflammation and dry eye-like changes in mice 认领 引用 被引量：1
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作者 Xiang Lin Yu-Wen Liu +7 位作者 Jia-Ni Li Wei-Jie Ouyang Li-Ying Tang Jie-Li Wu Zhao-Lin Liu Shi-Nan Wu Jiao-Yue Hu Zu-Guo Liu 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2026年第3期434-442,共9页
AIM:To investigate the impact of depression-like behavior on ocular surface homeostasis in a mouse model,with a focus on dry eye-like alterations.METHODS:Male C57BL/6J mice(10-12 weeks old)were randomly assigned to co... AIM:To investigate the impact of depression-like behavior on ocular surface homeostasis in a mouse model,with a focus on dry eye-like alterations.METHODS:Male C57BL/6J mice(10-12 weeks old)were randomly assigned to control or restraint stress(RS)groups.The RS group underwent three intermittent 24-hour restraint sessions to induce depressive-like behavior.Behavioral testing,tear secretion measurement,and corneal Oregon Green Dextran(OGD)staining were performed.Postmortem analyses included histological evaluation of lacrimal glands,goblet cell quantification using periodic acid-Schiff staining,and assessment of key inflammatory and apoptotic markers:interleukin(IL)-17,matrix metalloproteinases(MMP)-3,MMP-9,IL-13,interferon(IFN)-γ,and cleaved caspase-3 and-8.RESULTS:Repeated RS induced depression-like behavior and significant ocular surface changes.RStreated mice showed increased corneal OGD uptake and upregulation of gene/protein expression of IL-17,MMP-3,and MMP-9(P<0.05).Goblet cell density and IL-13 protein expression were reduced,while IFN-γprotein expression was elevated(P<0.05).Cleaved caspase-3 and-8 levels were significantly increased in both cornea and conjunctiva.Tear volume and lacrimal gland size were unchanged;however,mild inflammatory infiltration was observed in lacrimal glands.CONCLUSION:Repeated RS leads to ocular surface inflammation and dry eye-like pathology,including corneal barrier disruption,goblet cell loss,and epithelial apoptosis.These findings suggest that depression contributes to the pathogenesis of dry eye disease via immune-mediated mechanisms. 展开更多
关键词 depression restraint stress dry eye ocular surface damage inflammation mice
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Surface reconstruction via rapid solution quenching to enhance structural stability of lithium-rich layered cathodes 认领 引用 被引量：1
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作者 Hailiang Chu Jiaxiao Meng +4 位作者 Longde Duan Shujun Qiu Errui Wang Fen Xu Lixian Sun 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2026年第5期1553-1563,I0092-I0106,共11页
Lithium-rich layered oxides are prospective materials for future-generation cathodes attributable to their high specific capacity.However,significant surface instability,particularly under high-voltage operating condi... Lithium-rich layered oxides are prospective materials for future-generation cathodes attributable to their high specific capacity.However,significant surface instability,particularly under high-voltage operating conditions,leads to substantial voltage decay and dramatic capacity degradation during long-term cycling,severely limiting their widespread application.In this study,we developed a universal brine quenching strategy to construct a stabilized composite surface structure for lithium-rich layered oxides.This structure comprises an inner surface layer with a Y-doped layered structure and an outermost layer featuring a disordered rock-salt structure.Doping in the layered structure strengthens the Y-O bonds,raises the energy barrier for oxygen evolution,and significantly increases the stability of the lattice oxygen.Additionally,the disordered rock-salt surface structure reduces oxygen release during the charge and discharge cycles.Consequently,this well-designed surface structure significantly boosts the structural stability of the lithium-rich layered oxide surface,suppresses structural degradation during long-term cycling,and facilitates Li+diffusion kinetics.The improved redox activity,combined with superior structural stability,contributes to an outstanding electrochemical performance.For instance,the Y-quenched Li1.2Mn0.54Ni0.13Co0.13O2(LLO)cathode exhibited an improved discharge capacity of 283 mAh·g-1at 0.1 C and 223 mAh·g-1at 1 C,along with remarkable cyclic stability retaining 91.2% of its capacity after 300 cycles at 1 C,and a reduced voltage decay of 0.76 mV per cycle(compared to 1.16 mV per cycle for pristine LLO).This research provides valuable insights into the design and synthesis of high-energydensity lithium-rich layered oxides through a simple and cost-effective strategy. 展开更多
关键词 Li-rich layered oxides brine quenching surface structure voltage decay cycling stability
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Probing high-order deformation effects in neutron-deficient nuclei246,248No with improved potential-energy-surface calculations 认领 引用 被引量：1
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作者 Jin-Liang Guo Hua-Lei Wang +2 位作者 Kui Xiao Zhen-Zhen Zhang Min-Liang Liu 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2026年第3期143-152,共10页
The high-order deformation effects in even-even246,248No are investigated by means of pairing self-consistent WoodsSaxon-Strutinsky calculations using the potential-energy-surface(PES)approach in an extended deform... The high-order deformation effects in even-even246,248No are investigated by means of pairing self-consistent WoodsSaxon-Strutinsky calculations using the potential-energy-surface(PES)approach in an extended deformation space(β2,β3,β4,β5,β6,β7,β8).Based on the calculated two-dimensional projected energy maps and different potential energy curves,we found that the highly even-order deformations have an important impact on both the fission trajectory and energy minima,while the odd-order deformations,accompanying the even-order ones,primarily affect the fission path beyond the second barrier.Relative to the light actinide nuclei,the nuclear ground state changes to the superdeformed configuration,but the normally deformed minimum,as the low-energy shape isomer,may still be primarily responsible for enhancing nuclear stability and ensuring experimental accessibility in246,248No.Our present investigation indicates the nonnegligible impact of high-order deformation effects along the fission valley and will be helpful for deepening the understanding of different deformation effects and deformation couplings in nuclei,especially in this neutron-deficient heavy-mass region. 展开更多
关键词 High-order deformations Neutron-deficient nuclei Potential energy surface Nuclear stability Macroscopic–microscopic model
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Cooperative Pursuit of Unmanned Surface Vehicles Using Multi-Agent Reinforcement Learning 认领 引用 被引量：1
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作者 QU Xingru LI Chu +2 位作者 JIANG Yuze LONG Feifei ZHANG Rubo 《Journal of Shanghai Jiaotong university(Science)》 EI 2026年第1期187-194,共8页
This paper is concerned with the cooperative pursuit of unmanned surface vehicles(USVs)against the dynamic escaping target using multi-agent reinforcement learning.The Markov game process is established for pursuit-ev... This paper is concerned with the cooperative pursuit of unmanned surface vehicles(USVs)against the dynamic escaping target using multi-agent reinforcement learning.The Markov game process is established for pursuit-evasion,and the success criteria for cooperative capture of USVs are given by using distance and angle constraints.By virtue of the centralized training and decentralized execution framework as well as the long short-term memory network,cooperative pursuit training is conducted using the multi-agent soft actor-critic reinforcement learning,which can optimize capture performance of USVs against the escaping target.Besides,to avoid the occurrence of lazy capturer and increase the capture success rate,a multi-stage reward guidance method is developed,where the training process can be optimized according to the current states of both sides,effectively guiding vehicle to achieve the capture task from easy to difficult.Simulations are provided to illustrate the effectiveness of the proposed reinforcement learning method for cooperative pursuit of USVs. 展开更多
关键词 unmanned surface vehicle(USV) cooperative pursuit multi-agent soft actor-critic multi-stage reward
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Switching the Droplet Rebound Direction on Anisotropic Surfaces by Manipulating the Wetting State 认领 引用 被引量：1
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作者 Shuo-Yan Zhang Jian-Gang Guo 《Acta Mechanica Solida Sinica》 SCIE EI CSCD 2026年第4期552-562,共11页
Droplet rebound is a key topic in interfacial physics and fluid mechanics,with important applications in industry,energy,and biomedicine.Based on the principle of energy conservation,a theoretical model was developed ... Droplet rebound is a key topic in interfacial physics and fluid mechanics,with important applications in industry,energy,and biomedicine.Based on the principle of energy conservation,a theoretical model was developed to describe droplet rebound on anisotropic superhydrophobic surfaces,providing functional relationships between the rebound direction and velocity of the droplet and the structural characteristic parameters.Combined with numerical simulations and experimental characterization,it was found that a stable Cassie state reduces energy dissipation during the droplet spreading and rebound process,facilitating low energy rebound.Moreover,under different parameter conditions,droplets can exhibit completely opposite motion on anisotropic surfaces.With the increase of the proportion of structures in the Wenzel wetting state,the droplet rebound direction gradually shifts from opposite to the structural inclination to the same direction.Furthermore,the droplet spreading and rebound process is primarily influenced by the droplet’s initial state and the surface compressive stability.Through force-material optimized design,the fabricated biomimetic surface enables droplets to maintain a Cassie state with minimal energy dissipation even at We=18,reducing the required Weber number by 35%compared with the rebound distance in the Wenzel state.This study further refines the mechanical model of droplet rebound,addressing challenges such as the precise control of droplet motion. 展开更多
关键词 Droplet rebound Anisotropic surface Wetting state Structural design
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Path Planning for Unmanned Surface Vehicles in Dynamic Environments Based on Artificial Potential Field and Global Guided Reinforcement Learning 认领 引用 被引量：2
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作者 Shanqiang Li Chaoxi Li 《哈尔滨工程大学学报（英文版）》 CSCD 2026年第2期575-586,共12页
For unmanned surface vehicles(USVs),how to find an effective,feasible path that substantially improves mission success rates and time efficiency in dynamic marine environments is a critical issue.To address the path p... For unmanned surface vehicles(USVs),how to find an effective,feasible path that substantially improves mission success rates and time efficiency in dynamic marine environments is a critical issue.To address the path planning problem for USVs using deep reinforcement learning(DRL)in dynamic ocean environments,an improved algorithm based on Deep Q-Networks(DQN)is proposed,which is called Fast Guided Deep Q-Network Algorithm(FG-DQN).This algorithm combines DQN with the artificial potential field(APF)method and uses the A*algorithm to initialize a guiding path in a global static environment and to provide prior knowledge for the USVs.Additionally,the configuration of the reward function using APF and the guiding path effectively reduces the frequency of random movements during the early exploration phase of the DQN algorithm,which accelerates convergence,improves the computational efficiency of path planning,and increases path safety.Finally,the performance of the presented algorithm is validated through experiments in a 2D environment.Compared with traditional reinforcement learning methods such as Q-learning and Sarsa,as well as the original DQN algorithm,FG-DQN is more effective for USV path planning. 展开更多
关键词 Deep reinforcement learning Path planning Unmanned surface vehicles Fast guided deep Q-Network algorithm
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A numerical study on wind-driven runback characteristics of a thin water film flow over a solid surface 认领 引用 被引量：1
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作者 Jincheng Wang Ping He Hui Hu 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2026年第1期64-72,共9页
An unsteady numerical simulation is conducted to examine the dynamic runback characteristics of a water film flow driven by a boundary layer airflow over a solid surface pertinent to the dynamic glaze ice accretion pr... An unsteady numerical simulation is conducted to examine the dynamic runback characteristics of a water film flow driven by a boundary layer airflow over a solid surface pertinent to the dynamic glaze ice accretion process over aircraft wing surfaces.The multiphase flow simulation results of the wind-driven water runback(WDWR)flow are compared quantitatively with the experimental results in terms of the time-dependent variations of the water film thickness profiles and evolution of the front contact point of the runback water film flow.The underlying mechanism of the intermittent water runback behavior is elucidated by analyzing the time evolution of the airflow velocity and vorticity fields above the runback water film flow over the solid surface.To the best knowledge of the authors,the work presented here is the first successful attempt to numerically examine the transient runback characteristics of WDWR flows.It serves as an excellent benchmark case for the development of best practices to model the important micro-physical processes responsible for the transient water transport over aircraft wing surfaces. 展开更多
关键词 Multiphase flow simulation Water transport over wing surfaces Glaze ice accretion process Volume of fluid method
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The surface binding and energy issues in the rational design of separators for Li||S batteries 认领 引用
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作者 Hongfang Du Lijing Wang +8 位作者 Shuyu Cheng Chao Wu Sheng Yang Yang Liu Yi Zhao Dandan Cui Shaowei Zhang Shixue Dou Liangxu Lin 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第1期987-1013,I0021,共27页
Lithium-sulfur batteries(LSBs)represent a next-generation energy storage technology,but widespread applications are restricted by the shuttle of lithium polysulfides(LiPSs).The rational design of separators has been d... Lithium-sulfur batteries(LSBs)represent a next-generation energy storage technology,but widespread applications are restricted by the shuttle of lithium polysulfides(LiPSs).The rational design of separators has been demonstrated to be one of the most efficient and cost-effective strategies to curb the shuttle effect,and tremendous research progress has been achieved.The efficiency of a separator depends on its interaction with LiPSs,which is governed by the surface energy and binding strength.Despite several review works that have been reported to advance the separators,most of them primarily focus on active material innovation and construction.The most crucial issues of surface binding energy have not been systematically reviewed,limiting the precise design of efficient separators.In this review,fundamentals related to surface energy and binding interactions with LiPSs are comprehensively analyzed and discussed.With surface binding and energy main lines,the advancements in separator engineering strategies are elaborately summarized and discussed.Moreover,techniques for evaluating affinity to LiPSs are thoroughly analyzed to avoid any ambiguities in measurement.Based on the research context,valuable research directions are suggested to construct efficient separators.This work provides guidelines to regulate the surface binding and energy of separators for high-performance LSBs. 展开更多
关键词 Lithium-sulfur batteries Separator Surface binding affinity Surface energy Rational design
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Effect of surface area and pore size on long-term bone regeneration:dynamic changes in geometric characteristics,mass transport,and mechanobiology 认领 引用
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作者 Xing Peng Guoxian Zhang +5 位作者 Jian Pu Shu Yang Wen Cui Xue Zhou Shuxin Qu Zhongmin Jin 《Bio-Design and Manufacturing》 SCIE EI CAS CSCD 2026年第1期137-152,I0021,共16页
The specific surface area(S S)and pore size(D)exhibit an inherent trade-off in the microscale design of bone implants:larger pores typically correlate with reduced surface area and vice versa.This relationship has att... The specific surface area(S S)and pore size(D)exhibit an inherent trade-off in the microscale design of bone implants:larger pores typically correlate with reduced surface area and vice versa.This relationship has attracted notable attention because of its critical role in the regulation of cell adhesion and osteogenesis.However,it remains largely unclear how S S and D affect the generated bone tissue and dynamically change during long-term osteogenesis.Herein,by applying rigorous geometric mapping to minimal surfaces,we constructed precisely partitioned and layer-by-layer thickened tissue models to simulate osteogenesis across different temporal scales and thereby track the dynamic evolution of geometric characteristics,permeability,and mechanobiological tissue differentiation.The high-S S samples were found to facilitate the rapid formation of new bone tissue in the early stages.However,their smaller pores tended to cause occlusions,hindering further tissue development.In contrast,low-S S samples showed slower bone regeneration,but their larger pores provided adequate physical space for tissue regeneration and mass transport,ultimately promoting bone formation in the long term.Mechanobiological regulation suggests that fibrous tissue formation inhibits additional bone formation,establishing a dynamic equilibrium between osteogenesis and pore space to sustain nutrient/waste exchange throughout the regenerative process.Overall,smaller pores are preferable in implants for minimally loaded osteoplasty procedures focused on early-stage bone consolidation,whereas larger pores are preferable in dynamically loaded implants requiring prolonged mechanical stability. 展开更多
关键词 Minimal surface Specific surface area Pore size Bone ingrowth Mechanobiology Finite element simulation
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Marine Shell-Inspired Laser Surface Texturing:Characterizing the Surface Properties of Co-Based Alloy 认领 引用
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作者 Şefika Kasman Sertan Ozan 《Journal of Bionic Engineering》 SCIE EI CSCD 2026年第1期341-353,共13页
This study investigated surface roughness,the wettability behavior,and surface energy of Co-based alloy specimens textured using the biomimetic Laser Surface Texturing(LST)method.The surface texture was inspired by th... This study investigated surface roughness,the wettability behavior,and surface energy of Co-based alloy specimens textured using the biomimetic Laser Surface Texturing(LST)method.The surface texture was inspired by the patterns found on marine shells.The impacts of the parameters on wettability,Surface Free Energy(SFE),surface topography,and texture roughness generated by the laser beam tracking a spiral path were investigated.Reducing spiral pitch produces more complicated and chaotic surface patterns.Most surfaces are hydrophobic,and surface roughness and topography influence the Contact Angle(CA).Topography and roughness were affected by frequency and scanning speed;a decrease in scanning speed and frequency generated more chaotic and irregular surface textures.With general factorial analysis and Analysis of Variance(ANOVA),our statistical study reveals that accounting for 88%of the influence,the scanning speed is the primary factor influencing surface roughness.On the other hand,the spiral pitch is essential for defining the struc-tural features of the surface,even if it less influences roughness.The SFE of laser-textured CoCr28Mo alloy specimens was optimizable within the range of 14-32 mN/m.The relevant findings offer valuable insights into optimizing LST for the specific surface properties of the Co-based alloy. 展开更多
关键词 Bio-inspired surface CoCr28Mo alloy Wettability Surface roughness Surface free energy
Effect of femtosecond-laser process parameters on the surface structure and anti-reflection of surface texture 认领 引用
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作者 Bing Zhong Xiaoren Lv +4 位作者 Yanfei Huang Weiling Guo Zhiguo Xing Haidou Wang Yanfang Zhang 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2026年第2期106-118,共13页
The high surface reflectivity of metallic materials and their narrow range of electromagnetic wave absorption(primarily in the visible spectrum) severely limit their practical applications in defense,energy conversion... The high surface reflectivity of metallic materials and their narrow range of electromagnetic wave absorption(primarily in the visible spectrum) severely limit their practical applications in defense,energy conversion,and communication.Therefore,creating surface structures with anti-reflective properties on metallic materials can effectively reduce surface reflectivity and broaden the frequency bandwidth of electromagnetic wave absorption,a goal highly valued by scholars both domestically and internationally.In this study,we investigated the effect of femtosecond-laser process parameters(pulse frequency,processing power,scanning speed,processing time,and focal length) on the dimensional parameters and surface morphology of groove and circular hole structures using a single-factor approach.By varying the femtosecond-laser process parameters,we produced groove and circular hole specimens with different width/diameter-to-depth ratios.The results indicated that with increases in femtosecond-laser pulse frequency,processing power,scanning speed,and processing time,the width and depth of the grooves and circular holes increased to varying extents.We characterized the anti-reflective properties of the textured surfaces to elucidate the mechanism by which the width/diameter-to-depth ratio of the textured structures affects the anti-reflective properties of metal surfaces.The results show that the transverse dimensions and depths of the groove and hole structures increased linearly with increases in femtosecond-laser processing power and the number of processing cycles.The average reflectance of the structures increased from 15.15% to31.84% when the ratio of structural width(diameter) to depth ranged between 0.43 and 1.The average reflectance of the structures,calculated to be consistent with actual results,ranged from 12.13% to 36.37%.The findings demonstrate that the width/diameter-to-depth ratio of the structure is a crucial index for assessing antireflective performance. 展开更多
关键词 Femtosecond-laser Micro-texture Dimensional parameters Surface morphology Anti-reflective properties
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Dual‐Phosphidation‐Engineered Ni/NiO Heterojunction Nanoflowers With Synergistic Surface PO43-Group and P Doping Sites for High‐Performance and Low Temperature(?40°C)Supercapacitors 认领 引用
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作者 Ya‐Min Feng Ran Liu +8 位作者 Guang‐Lei Zhang Hu‐Cheng Zhou Hai‐Neng Bai Xiao‐Di Du Jun Li Jian Li Wei‐Feng Liu Jin‐Ping Liu Jun‐Ling Guo 《Rare Metals》 SCIE EI CAS CSCD 2026年第6期656-666,共11页
Nickel oxide(NiO)‐based electrodes with high theoretical specific capacitance can effectively increase the energy density of supercapacitors-the key factor limiting their practical deployment.However,several issues s... Nickel oxide(NiO)‐based electrodes with high theoretical specific capacitance can effectively increase the energy density of supercapacitors-the key factor limiting their practical deployment.However,several issues still restrict the production of advanced NiO‐based electrodes.First,a facile strategy to concurrently enhance surface‐interface and bulk conductivity is still absent,limiting the overall electrode conductivity.Second,strategies that boost OH−affinity often increase its desorption barrier,impeding OH−migration.Herein,to address these issues,heterostructured Ni/NiO porous nanoflowers with P‐doping sites and abundant surface PO43−groups(P‐PO4‐Ni/NiO)are prepared through simple phosphidation.In this material,(1)the heterojunction between Ni and P‐doped NiO increases the overall electrode conductivity;(2)surface PO43−groups and P‐doping sites synergistically boost the affinity for OH−and improve their transfer kinetics;and(3)owing to their structure,porous nanoflowers show a large electrolyte contact area.As a result,the specific capacitance of P‐PO4‐Ni/NiO is five times higher than that of pristine NiO.When assembled into asymmetric supercapacitors,the device exhibits an energy density of 33.1 Wh kg−1at 750 W kg−1.At−40°C,the device retains 62.0%of its room‐temperature capacitance and shows nearly no fade after 20,000 charge-discharge cycles.This work presents a robust route for the development of practical transition metal oxide‐based supercapacitors. 展开更多
关键词 low‐temperature metallic Ni NiO supercapacitors surface functionalization
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Construction of Bionic Non-Smooth Surface of Cu-Based Friction Materials Based on Finite Element Method 认领 引用
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作者 Lekai Li Juxiang Zhu +3 位作者 Zhaohua Yao Mengting Xing Yitong Tian Ma Yunhai 《Journal of Bionic Engineering》 SCIE EI CSCD 2026年第1期326-340,共15页
To solve the problem of abnormal abrasion of Cu-Based Friction Materials(CBFMs),Bionic Non-Smooth Surface(BNS)on friction surface of CBFMs was constructed based on bionic principles,and the optimal bionic prototype wa... To solve the problem of abnormal abrasion of Cu-Based Friction Materials(CBFMs),Bionic Non-Smooth Surface(BNS)on friction surface of CBFMs was constructed based on bionic principles,and the optimal bionic prototype was selected by Finite Element Method(FEM).In addition,the bionic parameters were optimized by Response Surface Method(RSM).Samples holding BNS were prepared by Laser Processing,tribological properties were tested by a Friction and Wear Tester and worn surface morphology was characterized by a Scanning Electron Microscope(SEM).The results showed that BNS on friction surface could regulate the stress distribution and alleviate the peak stress.Among all samples,the coupled texture of pit-hexagonal got the minimum peak stress.During braking,bionic texture could also collect wear debris or change the motion forms from sliding to rotation,which can reduce abnormal abrasion.The wear rate was reduced by 19.31%.The results in this paper can provide a new idea for enhancing the tribological properties of CBFMs,and can also lay the foundation for further research of bionic tribology. 展开更多
关键词 Bionic non-smooth surface Friction materials FEM Wear mechanism
Visual Servo-Based Formation Control of Unmanned Surface Vehicles 认领 引用
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作者 Xiang Liu Yueying Wang +1 位作者 Xudong Zhao Zhiguang Feng 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2026年第2期480-482,共3页
Dear Editor,This letter addresses the formation control problem for unmanned surface vehicles(USVs)under GPS-denied environments.A novel visual servo formation control scheme,utilizing a monocular camera on the follow... Dear Editor,This letter addresses the formation control problem for unmanned surface vehicles(USVs)under GPS-denied environments.A novel visual servo formation control scheme,utilizing a monocular camera on the follower to obtain the leader’s global position,is developed,which is also capable of guaranteeing collision avoidance and visibility maintenance(CA&VM)raised by the requirement of actual formation navigation. 展开更多
关键词 visual servo formation control collision avoidance formation navigation unmanned surface vehicles usvs monocular camera unmanned surface vehicles formation control visual servo
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A Dual-Broadband Liquid-Crystal Programmable Metasurface and Its Application in Terahertz Wireless Communications 认领 引用
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作者 Yuan Fu Yuanbo Li +8 位作者 Xiaojian Fu Lu Xu Yujie Liu Qun Yan Zhou Jun Yang Chong Han Jun Yan Dai Qiang Cheng Tie Jun Cui 《Engineering》 SCIE EI CSCD 2026年第4期352-363,共12页
Terahertz communication technology is envisioned as a promising candidate for the pivotal spectrum technology in future wireless communication networks.However,the limited penetration ability of terahertz waves makes ... Terahertz communication technology is envisioned as a promising candidate for the pivotal spectrum technology in future wireless communication networks.However,the limited penetration ability of terahertz waves makes line-of-sight(LoS)transmission indispensable,hindering the extensive application of terahertz communications.In this work,a novel liquid-crystal programmable metasurface(LCPM)is proposed for the first time,which can effectively achieve dual-broadband beam manipulation to improve link stability and extend coverage for terahertz communications in non-line-of-sight(NLoS)scenarios.The LCPM is operated in both the W band that covers 94 GHz and the D band that covers 140 GHz,corresponding to x-polarized and y-polarized wave incidence,respectively.Based on the proposed LCPM,realistic NLoS terahertz communication links are established and showcased.Communication measurements substantiate that the LCPM is capable of realizing extensive dynamic channel regulations and long-distance communications across both bands in various modulation schemes,supporting real-time high-speed video transmission.The experimental results validate the feasibility of employing the LCPM for terahertz wireless communications,paving the way for developing and implementing ubiquitous terahertz communication networks even with LoS blockage. 展开更多
关键词 Programmable metasurface Terahertz communication Reconfigurable intelligent surface Dual-frequency Broadband Beamforming
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Environment-adaptive design of multilayer optical structures for surface polariton excitation via dynamic multi-objective optimization 认领 引用
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作者 Ru Lei Lin Li +4 位作者 Yiqi Feng Ziyue Ren Kun Zhang Lixun Sun Ting Mei 《Defence Technology（防务技术）》 SCIE EI CAS CSCD 2026年第5期267-279,共13页
The graphene±dielectric multilayer architecture constitutes a fundamental and widely utilized platform for sustaining surface polariton(SP)propagation.Owing to their extraordinary prospects in defence critical te... The graphene±dielectric multilayer architecture constitutes a fundamental and widely utilized platform for sustaining surface polariton(SP)propagation.Owing to their extraordinary prospects in defence critical technologies,including radar-absorbing stealth coatings,high-power microwave shielding,and ultrafast optical switching,SPs have attracted intense and sustained interest.In this study,we develop an environment-adaptive design framework that models wavelength variation as a dynamic environmental change and automatically adjusts the design parameters in response.Our method employs a dynamic multi-objective optimization algorithm augmented with a predictive transfer strategy,optimizing SP coupling efficiency,structural compactness,and fabrication feasibility.Using a population history prediction mechanism,the framework not only adaptively generates multilayer designs across the full visible spectrum without full re-initialization,but also retains and exploits knowledge of how environmental variations influence the distribution of optimal solutions.This enables rapid adjustment of the optimization direction when parameters such as wavelength,angle,or doping change,thus avoiding the need to restart the search from scratch.Comprehensive comparisons demonstrate outstanding robustness under continuous wavelength shifts.The optimized graphene-coated distributed Bragg reflector(DBR)stacks achieve near-perfect absorption(>98%)at each individual wavelength across the visible spectrum.This work not only provides theoretical guidance for SP excitation experiments,but also contributes to the optimization of polariton device design,which is crucial for enhancing the performance of defence-related optical systems. 展开更多
关键词 Distributed bragg reflectors Surface polariton Dynamic multi-objective optimization
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Harnessing Surface Instabilities for Functional Materials:Mechanics,Morphology,and Emerging Applications 认领 引用
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作者 Qiuting Zhang Yunli Li +5 位作者 Ruifeng Zhang Enfang Wang Ye Xu Yujie Ke Xi Chen Gaojian Lin 《Nano-Micro Letters》 SCIE EI CAS CSCD 2026年第9期1177-1209,共33页
Surface instabilities,such as wrinkling,folding,and creasing,have transcended their traditional perception as mechanical failures to emerge as a powerful and versatile paradigm for engineering functional surface morph... Surface instabilities,such as wrinkling,folding,and creasing,have transcended their traditional perception as mechanical failures to emerge as a powerful and versatile paradigm for engineering functional surface morphologies in soft materials.This review comprehensively examines the mechanics,fabrication,and rapidly expanding applications of these instability-driven patterns.This review first elucidates the fundamental principles governing the formation of various instability modes,stemming from classical model of thin film–substrate system,and discusses advanced strategies for achieving precise morphological control,including hierarchical and spatially organized structures.Then the core of this review highlights the transformative impact of these tailored surface topographies across diverse fields.Key applications explored include the development of highly sensitive and stretchable electronic skins(E-skins),energy-harvesting triboelectric nanogenerators,deformable optoelectronic devices,physically unclonable features for advanced optical encryption and anti-counterfeiting,engineering surfaces with dynamically tunable wettability,and biomimetic constructs for biomedical engineering and artificial tissues.Finally,a forward-looking perspective on the challenges and future opportunities in this vibrant field was provided,emphasizing the potential of integrating stimuli-responsive materials,computational design,and artificial intelligence to develop the next generation of intelligent,adaptive,and multifunctional surfaces. 展开更多
关键词 Surface instabilities Functional materials Stretchable devices Tunable wettability Biomedical engineering
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Insights into the adsorption properties of NaOL on hydroxide mineral surfaces:Experiments and DFT calculations 认领 引用
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作者 YAO Jin DU Wei-fan +3 位作者 GONG Xiu-feng YIN Wan-zhong YU Jian-wei ZHAO Xu 《Journal of Central South University》 SCIE EI CAS CSCD 2026年第4期1568-1582,共15页
Brucite,diaspore,and limonite,as typical hydroxide minerals,exhibit similar surface properties due to their high content of -OH.This study investigated the effect of traditional anionic collector sodium oleate(NaOL)on... Brucite,diaspore,and limonite,as typical hydroxide minerals,exhibit similar surface properties due to their high content of -OH.This study investigated the effect of traditional anionic collector sodium oleate(NaOL)on the flotation performance and surface properties of brucite,diaspore,and limonite.The flotation experiment results show that adding 40 mg/L NaOL at pH 11 can significantly increase the flotation recovery of brucite compared to diaspore and limonite.The results of contact angle,zeta potential,and XPS indicate that NaOL can exhibit strong adsorption on the surfaces of the three minerals,but the adsorption effect on the brucite surface is stronger than that on diaspore and limonite,resulting in differences in floatability among the three minerals.This is mainly due to the weak interlayer interaction force of brucite,which can expose more Mg 2+sites during the grinding process,resulting in brucite being able to adsorb more oleate ions.DFT calculations further indicate that sodium oleate has greater adsorption energy on the brucite surface and can stably undergo chemical adsorption through covalent bonding between O in the carboxyl group and metal sites on the surface of hydroxides.This study provides molecular-level insights into the design of highly efficient selective collectors for metal hydroxide minerals. 展开更多
关键词 hydroxide minerals density functional theory surface characteristics adsorption mechanism floatability
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Surface engineering enhancingctivitynd stability of Bi2WO6-x for selective C–H bond photooxidation 认领 引用
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作者 Xiong Wang Chao Peng +14 位作者 Yongkang Xiao Ziye Zhang Huiping Zheng Wenjie Yue Sheng Tian Xingsheng Hu Weifan Shao Guanghui Chen Binghao Wang Huijuan Wang Mingming Yin Jinxin Li Yang Li Lang Chen Shuangfeng Yin 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2026年第2期246-258,共13页
Oxygen vacancies(Ov)play a pivotal role in enhancing photocatalytic C–H bond oxidation,yet their susceptibility to depletion under oxidative conditions significantly compromises catalyst stability.To address this cha... Oxygen vacancies(Ov)play a pivotal role in enhancing photocatalytic C–H bond oxidation,yet their susceptibility to depletion under oxidative conditions significantly compromises catalyst stability.To address this challenge,we developed a surface engineering strategy through in-situ growth of a Bi-MOF layer on oxygen vacancy-rich Bi2WO6(Bi2WO6-x@Bi-MOF).This interfacial Bi–O interaction not only constructed a built-in charge transfer channel to boost electron migration from Bi2WO6-x to Bi-MOF,but also shifted the Bi p-band center closer to the Fermi level(Ef)to facilitate the adsorption of oxygen molecules and toluene.This surface engineering strategy preferentially adsorbs O2 on Bi-MOF and prevents its direct interaction with the Bi2WO6-x host,thereby mitigating oxygen vacancy depletion and enhancing catalyst stability.The optimized photocatalyst achieves 96%toluene conversion and 80%benzaldehyde selectivity within 2 h of light irradiation and maintains excellent structural stability and catalytic performance over ten consecutive cycles.This study offers a new design strategy for constructing robust and efficient Ov-based photocatalytic systems and expands the potential application of MOF materials in complex interfacial reactions. 展开更多
关键词 Photocatalysis Oxygen vacancies Surface engineering C-H oxidation Metal-organic framework
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