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Optimized design and performance testing of hydraulic electrostatic actuator

International Journal of Smart and Nano Materials 2024年第4期15卷 811-834页

作者： Yuze Ye Qingsong He Changli Yang Xiaodong Xu Lin Xie Diyi Liu Bo Zeng Zhijian Leng Jiangsu Key Laboratory of Bionic Materials and Equipment College of Mechanical and Electrical EngineeringNanjing University of Aeronautics and AstronauticsNanjingChina Key Laboratory of Advanced Technology for Small and Medium-Sized UAV Ministry of Industry and Information TechnologyUnmanned Aerial Vehicles Research InstituteNanjing University of Aeronautics and AstronauticsNanjingChina State Key Laboratory of Mechanics and Control of Aerospace Structures Nanjing University of Aeronautics and AstronauticsNanjingChina Laboratory of Aerospace Servo Actuation and Transmission Beijing Institute of Precision Mechatronics and ControlsBeijingChina Technology Center CCCC Second Harbor Engineering CompanyWuhanChina

Hydraulic electrostatic actuators have become a research hotspot for their inherent flexibility and safety of human-machine *** paper aims to combine the characteristics of dielectric elastomers and fluid actuators,enhancing the dielectric constant and breakdown field strength by modifying Al_(2)O_(3)on the surface of nanostructured BaTiO3 and in order to develop a hydraulic electrostatic actuator with silicone rubber as the matrix ***-factor experiments were firstly conducted to confirm the range of three factors affecting the actuation strain of the actuator:BaTiO_(3)@Al_(2)O_(3)content,thickness of the silicone rubber elastomer film,and pre-stretching ratio *** response surface methodology was used to study the interactive influence of the above three influencing factors on the actuation *** was obtained that A has an insignificant influence on the actuation strain,AB has a significant influence on the actuation strain,and B,C,AC,and BC have a highly influence on the actuation *** actuation strain as the optimization objective yielded the combination results of each factor:BaTiO_(3)@Al_(2)O_(3)content of 2.57%,thickness of 0.60 mm,and pre-stretching ratio coefficient of *** strain tests were conducted with optimized parameters under *** experimental results of the actuation strain test show that the relative error between the test value and the model prediction value of 16.47%is less than 5%,and the optimization model results are *** optimized hydraulic electrostatic actuator was tested for actuation strain and electrical performance under different *** experiment showed that the maximum actuation strain of the hydraulic electrostatic actuator was 17.20%under a load of 100 *** critical breakdown current of the actuator ranged from 115μA to 130μA,and the maximum electromechanical conversion efficiency of the actuator under different loads was 67.93%.Finally,a joint actuati

关键词： Hydraulic electrostatic actuator BaTiO_(3)@Al_(2)O_(3) response surface experiments actuation strain

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Influence of Texture on Hall-Petch Slope in Hot-extruded AZ31 Magnesium Alloys

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Journal of Wuhan University of technology(Materials Science) 2023年第4期38卷 917-923页

作者：王岭 ZHAO Yiquan WANG Yanmeng SUN Chao CHEN Hongmei ZHANG Jing ZHAO Mei LIU Ying WANG Yinong Liaoning Key Laboratory of Chemical Additive Synthesis and Separation Yingkou Institute of TechnologyYingkou115014China CATARC Automotive Test Center(Tianjin)Co. LtdTianjin300399China School of Electrical Engineering Dalian University of TechnologyDalian116024China Provincial Key Lab of Advanced Welding Technology Jiangsu University of Science and TechnologyZhenjiang212003China School of Metallurgy and Materials Engineering Jiangsu University of Science and TechnologyZhangjiagang215600China School of Materials Science and Engineering Dalian University of TechnologyDalian116024China

To study the influence of texture on Hall-Petch slope,the Hall-Petch relationships of two hot-extruded AZ31 alloys(A117 and A189)were determined by the measurement of yield strength at room *** determine the real texture difference,the texture changes were facilitated by the variation of extrusion ratio and demonstrated by the actual grain orientation *** A117 alloys exhibited higher Hall-Petch slope in comparison of A187 in the condition of tension and compression,because A117 alloys had lower volume fraction of grains in the range of basal pole 75°-90°.The Hall-Petch slope differences for both alloys were analyzed and discussed by boundary obstacle against deformation propagation in grains with various *** to the higher volume fraction of grains in the range of basal pole 75°-90°in A189,the effect of hindering dislocation slip or twinning propagation by grains boundary was weaker than of A117.

关键词： Hall-Petch relationship AZ31 texture

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Graphene-anchored sodium single atoms:A highly active and stable catalyst for transesterification reaction

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Nano Research 2024年第6期17卷 4979-4985页

作者： Song-Song Peng Yao Nian Xing-Ru Song Xiang-Bin Shao Chen Gu Zhi-Wei Xing Shi-Chao Qi Peng Tan You Han Xiao-Qin Liu Lin-Bing Sun State Key Laboratory of Materials-Oriented Chemical Engineering Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)College of Chemical EngineeringNanjing Tech University30 South Puzhu RoadNanjing 211816China School of Chemical Engineering and Technology Tianjin UniversityTianjin 300072China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China

Solid strong base catalysts have received considerable attention in various organic reactions due to their facile separation,neglectable corrosion,and environmental *** great progress has been made in the preparation of solid strong base catalysts,it is still challenging to avoid basic sites aggregation on support and active sites loss in reaction ***,we report a tandem redox strategy to prepare Na single atoms on graphene,producing a new kind of solid strong base catalyst(Na1/G).The base precursor NaNO_(3)was first reduced to Na2O by graphene(400℃)and successively to single atoms Na anchored on the graphene vacancies(800℃).Owing to the atomically dispersed of basicity,the resultant catalyst presents high activity toward the transesterification of methanol and ethylene carbonate to synthesize dimethyl carbonate(turnover frequency(TOF)value:125.7 h^(−1)),which is much better than the conventional counterpart Na2O/G and various reported solid strong bases(TOF:1.0-90.1 h^(−1)).Furthermore,thanks to the basicity anchored on graphene,the Na1/G catalyst shows excellent durability during *** work may provide a new direction for the development of solid strong base catalysts.

关键词： solid strong base catalyst basic sites redox graphene single Na atoms

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Improved the lightweight part identification method of YOLOv5 4

Improved the lightweight part identification method of YOLOv...

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4th International Conference on Artificial Intelligence and Electromechanical Automation, AIEA 2023

作者： Qin, Qi Zhao, Li-Gang Yuan, Jun-Tao School of Mechanical Engineering Jiangsu University of Science and Technology Zhenjiang212100 China Jiangsu Provincial Key Laboratory of Advanced Manufacturing for Marine Mechanical Equipment Jiangsu University of Science and Technology Zhenjiang212100 China

ISBN: (纸本)9781510666412

Aiming at the defects of the existing part recognition methods in the industrial production process when identifying small and dense parts, and the problem that the number of model parameters and large volume are difficult to deploy on the mobile platform, an improved YOLOv5 lightweight part target recognition model is proposed. On the basis of the YOLOv5 model, the Ghost module is first used to replace the backbone network to reduce the number of parameters of the model. Secondly, a SPP_F feature pyramid structure is constructed to speed up the training speed of the model and strengthen the ability of the model to extract information. Remove the detection layer for large target scales, thereby speeding up model training and detection;Finally, the GIOU function in the YOLOv5 model is replaced with the Alpha-SIOU function to improve the positioning accuracy of the bounding box. Experimental results show that the average accuracy (mAP) of the improved model reaches 99.5%, and the volume only accounts for 3.2MB, which is 35% faster than the original YOLOv5 model, reducing hardware costs and meeting the needs of deployment in low-computing equipment. © 2023 SPIE.

关键词： Detection and tracking algorithms Convolution Data modeling Feature extraction Performance modeling Object detection Target detection Target recognition Education and training Image processing

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Electromechanical and photoelectric properties of a novel semiconducting Janus InGaSSe monolayer

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Journal of Semiconductors 2023年第1期44卷 85-93页

作者： Li Zhong Xiaobao Li Wei Wang Xinle Xiao School of Civil Engineering Hefei University of TechnologyHefei 230009China Jiangsu Key Laboratory of Engineering Mechanics Southeast UniversityNanjing 210096China Key Laboratory of MicroNano Powder and Advanced Energy Materials of Anhui Higher Education Institute School of Chemistry and Materials EngineeringChizhou UniversityChizhou 247000China

In recent years,Janus two-dimensional(2D)materials have received extensive research interests because of their outstanding electronic,mechanical,electromechanical,and optoelectronic *** this work,we explore the structural,electromechanical,and optoelectronic properties of a novel hypothesized Janus InGaSSe monolayer by means of first-principles *** is confirmed that the Janus InGaSSe monolayer indeed show extraordinary charge transport properties with intrinsic electron mobility of 48139 cm^(2)/(V·s)and hole mobility of 16311 cm^(2)/(V·s).Both uniaxial and biaxial strains can effectively tune its electronic ***,the Janus InGaSSe monolayer possesses excellent piezoelectric property along both inplane and out-of-plane *** results of this work imply that the Janus InGaSSe monolayer is in fact an efficient photocatalyst candidate,and may provide useful guidelines for the discovery of other new 2D photocatalytic and piezoelectric materials.

关键词： Janus InGaSSe monolayer semiconducting photocatalyst piezoelectricity

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Efficient electrooxidation of biomass-derived aldehydes over ultrathin Ni V-layered double hydroxides films

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Journal of Energy Chemistry 2023年第3期78卷 412-421,I0012页

作者： Biying Liu Zhikeng Zheng Yaoyu Liu Man Zhang Yuchen Wang Yangyang Wan Kai Yan Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology School of Environmental Science and EngineeringSun Yat-sen UniversityGuangzhou 510275GuangdongChina Guangdong Laboratory for Lingnan Modern Agriculture South China Agricultural UniversityGuangzhou 510642GuangdongChina Institute for Advanced Materials School of Materials Science and EngineeringJiangsu UniversityZhenjiang 212013JiangsuChina

Selective upgrading of C=O bonds to afford carboxylic acid is significant for the petrochemical industry and biomass *** we declared the efficient electrooxidation of biomass-derived aldehydes family over NiV-layered double hydroxides(LDHs) thin *** studies confirmed the hydroxyl active intermediate(-OH*) generated on the surface of NiV-LDHs films by employing electrochemical impedance spectroscopy and the electron paramagnetic resonance *** using advanced techniques,e.g.,extended X-ray absorption fine structure and high-angle annular dark-field scanning transmission electron microscopy,NiV-LDHs films with 2.6 nm could expose larger specific surface *** benzaldehyde as a model,high current density of 200 mA cm^(-2)at 1.8 V ***,81.1% conversion,77.6% yield of benzoic acid and 90.8% Faradaic efficiency were reached,which was superior to most of previous *** DFT analysis was well matched with experimental findings and documented that NiV-LDHs had high adsorption capacity for the aldehydes to suppress the side reaction,and the aldehydes were oxidized by the electrophilic hydroxyl radicals formed on *** findings offer a universal strategy for the robust upgrading of diverse biomass-derived platform chemicals.

关键词： NiV-LDHs Films Hydroxyl radicals Electrocatalytic oxidation Biomass-derived aldehydes

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Status and challenges facing representative anode materials for rechargeable lithium batteries

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Journal of Energy Chemistry 2022年第3期31卷 260-294,I0008页

作者： Liqiang Zhang Chenxi Zhu Sicheng Yu Daohan Ge Haoshen Zhou Institute of Intelligent Flexible Mechatronics School of Mechanical EngineeringJiangsu UniversityZhenjiang 212013JiangsuChina Center of Energy Storage Materials&Technology College of Engineering and Applied SciencesJiangsu Key Laboratory of Artificial Functional MaterialsNational Laboratory of Solid State Microstructuresand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093JiangsuChina Energy Technology Research Institute National Institute of Advanced Industrial Science and Technology(AIST)Tsukuba 305-8568Japan

Rechargeable lithium batteries have been widely regarded as a revolutionary technology to store renewable energy sources and extensively researched in the recent several *** an indispensable part of lithium batteries,the evolution of anode materials has significantly promoted the development of lithium ***,since conventional lithium batteries with graphite anodes cannot meet the ever-increasing demands in different application scenarios(such as electric vehicles and large-scale power supplies)which require high energy/power density and long cycle life,various improvement strategies and alternative anode materials have been exploited for better electrochemical *** this review,we detailedly introduced the characteristics and challenges of four representative anode materials for rechargeable lithium batteries,including graphite,Li_(4)Ti_(5)O_(12),silicon,and lithium *** some of the latest advances are summarized,which mainly contain the modification strategies of anode materials and partially involve the optimization of electrode/electrolyte ***,we make the conclusive comments and perspectives,and draw a development timeline on the four anode *** review aims to offer a good primer for newcomers in the lithium battery field and benefit the structure and material design of anodes for advanced rechargeable lithium batteries in the future.

关键词： Lithium batteries Anode Graphite Li_(4)Ti_(5)O_(12) Silicon Silicon composite anode Lithium metal

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Upconversion hollow nanospheres CeF_(3) co-doped with Yb^(3+) and Tm^(3+) for photocatalytic nitrogen fixation

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Journal of Rare Earths 2022年第4期40卷 586-594,I0003页

作者： Minghui Zhong Zhendong Wang Da Dai Baozhu Yang Shixiang Zuo Chao Yao Fengqin Wu Xiazhang Li Advanced Catalysis and Green Manufacturing Collaborative Innovation Center Jiangsu Key Laboratory of Advanced Catalytic Materials and TechnologyChangzhou UniversityChangzhou 213164China W.M.Keck Center for Advanced Microscopy and Microanalysis University of DelawareNewarkDE19716USA

Solar driven nitrogen(N_(2))fixation to synthesize ammonia is a potential alternative for the traditional Haber-Bosch approach to meeting industrial demand,but is largely hampered by the difficulties in the harvesting of solar energy and activating inert N_(2).In this work,hollow CeF_(3) nanospheres co-doped with activator Tm^(3+)and sensitizer Yb^(3+)(Yb^(3+):Tm^(3+):CeF_(3))were prepared by microwave hydrothermal *** product was employed as a catalyst for photo-driven N_(2) fixation by adjusting the molar ratio of Ce^(3+):Yb^(3+):Tm^(3+).Results show that the porous hollow structure enhances the light-harvesting by physical scattering and *** addition,heteroatom doping generates abundant fluorine vacancies(F_(V))which provide abundant active sites for adsorption and activation of N_(2).The sample with molar ratio of CeF_(3):Yb^(3+):Tm^(3+)at 178:20:2 demonstrates the highest utilization of solar energy attributed to the strongest upconversion capability of near-infrared(NIR)light to visible and ultraviolet(UV)light,and the NH_(4)+concentration achieves the highest value of 15.06μmol/(gcat∙h)under simulated sunlight while nearly 6.22μmol/(gcat∙h)under NIR *** study offers a promising and sustainable strategy for the fixation of atmospheric N_(2) using full-spectrum solar energy.

关键词： Rare earth CeF_(3) Hollow structure Upconversion Fluorine vacancy Photocatalytic nitrogen fixation

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Layered double hydroxide nanosheets activate CsPbBr_(3) nanocrystals for enhanced photocatalytic CO_(2) reduction

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Nano Research 2022年第7期15卷 5953-5961页

作者： Shuang Zhao Qian Liang Zhongyu Li Hong Shi Zhenyu Wu Hui Huang Zhenhui Kang Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology School of Petrochemical EngineeringChangzhou UniversityChangzhou 213164China Institute of Functional Nano and Soft Materials Laboratory(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou 215123China Macao Institute of Materials Science and Engineering Macao University of Science and TechnologyTaipa 999078MacaoChina Institute of Advanced Materials Northeast Normal UniversityChangchun 130024China

Halide perovskite nanocrystals are potential catalysts for CO_(2) photoreduction,while,the strong radiative recombination and insufficient stability limit their catalytic performance and ***,we report that layered double hydroxide nanosheets activate CsPbBr_(3) nanocrystals(CLDH)for enhanced photocatalytic CO_(2) *** CLDH heterojunctions show the remarkably enhanced CO_(2) photoreduction performance;without cocatalyst and sacrificial agent,the average electron consumption rate of CLDH(49.16μmol·g^(−1)·h^(−1))is approximately 3.7 times higher than that of pristine CsPbBr_(3).Also,CLDH catalyst exhibits a robust stability after ten cycles over 30 h.

关键词： CsPbBr_(3) NiAl-LDH CO_(2)reduction Z-scheme photocatalysis

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Epitaxially Growing 2D RGB Trichromatic Cocrystal Nanomeshes to Trigger Cross-Modulation White Light Emission

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Chinese Journal of Chemistry 2024年第24期42卷 3379-3386页

作者： Wenyubin Luo Cheng Zhang Shan Yang Lei Ding Yang Li Yanqiu Sun Qichun Zhang School of Chemistry and Life Sciences Suzhou University of Science and TechnologySuzhouJiangsu 215009China Key Laboratory of Efficient Low-carbon Energy Conversion and Utilization of Jiangsu Provincial Higher Education Institutions School of Physical Science and TechnologySuzhou University of Science and TechnologySuzhouJiangsu 215009China Department of Materials Science and Engineering Department of ChemistryCenter of Super-Diamond and Advanced Films(COSDAF)&Hong Kong Institute of Clean EnergyCity University of Hong KongHong Kong 999077China

Considering their oriented crystalline structure and high luminescent efficiency,the exploration of multi-component organic cocrystal systems with tunable supramolecular nanostructures and potential RGB light emission has emerged as a captivating but challenging ***,we propose a straightforward synthetic strategy to precisely govern the assembly,structure and structure-property relationship of organic *** employing the single-crystalline template-assisted epitaxial growth(SCT-EG)method,the two-dimensional(2D)highly-aligned cocrystal nanomeshes are firstly developed to afford an exceptional RGB trichromatic system,triggering cross-modulation white light emission(WLE)with remarkable stability and regeneration capacity over six *** transformation from random 1D microstructures to uniformly-oriented 2D nanomeshes can be attributed to the regulatory competitive intermolecularπ-π,CT interactions,and partial H bond interactions among ***,the successful construction of 2D RGB trichromatic cocrystal nanomeshes system holds promise to generate full-color display,which can function as multicolor inks for photonic dynamic recognition,information encryption,and decryption.

关键词： Organic cocrystal Nanomesh RGB trichromatic system Cross-modulation white light emission Competitive intermolecular interactions Organic optoelectronics Photoelectric performances 2D materials

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