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Insights into the effect of Y substitution on superlattice structure and electrochemical performance of A5B19-type La-Mg-Ni-based hydrogen storage alloy for nickel metal hydride battery

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材料科学技术（英文版） 2025年第4期207卷 60-69页

作者： Yanan Guo Wenfeng Wang Huanhuan Su Hang Lu Yuan Li Qiuming Peng Shumin Han Lu Zhang College of Environmental and Chemical Engineering Hebei Key Laboratory of Applied ChemistryYanshan UniversityQinhuangdao 066004China State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004China College of Environmental and Chemical Engineering Hebei Key Laboratory of Applied ChemistryYanshan UniversityQinhuangdao 066004China State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004China Baotou Zhongke Xuanda New Energy Technology Co.Ltd. Baotou 014030China

La-Mg-Ni-based hydrogen storage alloys with superlattice structures are the new generation anode mate-rial for nickel metal hydride(Ni-MH)batteries owing to the advantages of high capacity and exceptional activation ***,the cycling stability is not currently satisfactory enough which plagues its ***,a strategy of partially substituting La with the Y element is proposed to boost the capacity durability of La-Mg-Ni-based ***,phase structure regulation is implemented simultaneously to obtain the A5B19-type alloy with good crystal stability *** is found that Y promotes the phase formation of the Pr5Co19-type phase after annealing at 985 ℃.The alloy containing Y contributes to the superior rate capability resulting from the promoted hydrogen diffusion ***,Y substitution enables strengthening the anti-pulverization ability of the alloy in terms of increasing the volume match between[A2B4]and[AB5]subunits,and effectively enhances the anti-corrosion ability of the alloy due to high electronegativity,realizing improved long-term cycling stability of the alloy from 74.2％to 78.5％after cycling 300 *** work is expected to shed light on the composition and structure design of the La-Mg-Ni-based hydrogen storage alloy for Ni-MH batteries.

关键词： Nickel metal hydride battery Y element La-Mg-Ni-based alloy A5B19-type superlattice structure Electrochemical performance

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WeldNet:A voxel-based deep learning network for point cloud annular weld seam detection

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science China(Technological sciences) 2024年第4期67卷 1215-1225页

作者： WANG Hui RONG YouMin XU JiaJun XIANG SongMing PENG YiFan HUANG Yu State Key Laboratory of Intelligent Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan 430074China School of Mechanical Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China

Weld seam detection is an important part of automated *** present,few studies have been conducted on annular weld seams,and a lot of defects exist in the point cloud model of the tube sheet obtained by RGB-D cameras and photography *** at the above problems,this paper proposed an annular weld seam detection network named WeldNet where a voxel feature encoding layer was adaptively improved for annular weld seams,the sparse convolutional network and region proposal network(RPN)were used to detect annular weld seam position,and an annular weld seam detection loss function was ***,an annular weld seam dataset was established to train the *** with the random sampling consistency(RANSAC)method,WeldNet has a higher detection accuracy,as well as a higher detection success rate which has increased by 23%.Compared with U-Net,WeldNet has been proven to achieve a better detection result,and the intersection over the union of the weld seam detection is improved by 17.8%.

关键词： deep learning point cloud weld seam detection welding annular weld seam

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Research Progress on Bionic Water Strider Robots

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Journal of Bionic engineering 2024年第2期21卷 635-652页

作者： Jianhao Liu Mingjun Shen Ziqiang Ma Xinping Zhou School of Mechanical Science and Engineering Huazhong University of Science and TechnologyWuhan430074China State Key Laboratory of Intelligent Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan430074China

Biological water striders have advantages such as flexible movement,low disturbance to the water surface,and low *** have developed a large number of biomimetic water strider robots based on their movement mechanism,which have broad application prospects in water quality testing,water surface reconnaissance,and *** article mainly reviews the research progress of biomimetic water strider ***,the biological and kinematic characteristics of water striders are outlined,and some mechanical parameters of biological water striders are *** basic equations of water strider movement are then ***,an overview is given of the past and current work on skating and jumping movements of biomimetic water strider robots based on surface tension and water pressure *** on the current research status of biomimetic water strider robots,the shortcomings of current research on biomimetic water striders are summarized,and the future development of biomimetic water strider robots is *** article provides new insights for the design of biomimetic water strider robots.

关键词： Bionics Water strider Robot Motion of robots on water surface

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1,3,5-Trifluorobenzene endorsed EC-free electrolyte for high-voltage and wide-temperature lithium-ion batteries

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Journal of Energy Chemistry 2023年第10期85卷 49-57,I0003页

作者： Mingsheng Qin Ziqi Zeng Qiang Wu Xiaowei Liu Qijun Liu Shijie Cheng Jia Xie State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina

Ethylene carbonate(EC)is susceptible to the aggressive chemistry of nickel-rich cathodes,making it undesirable for high-voltage lithium-ion batteries(LIBs).The arbitrary elimination of EC leads to better oxidative tolerance but always incurs interfacial degradation and electrolyte ***,an EC-free electrolyte is deliberately developed based on gradient solvation by pairing solvation-protection agent(1,3,5-trifluorobenzene,F_(3)B)with propylene carbonate(PC)/methyl ethyl carbonate(EMC)formulation.F_(3)B keeps out of inner coordination shell but decomposes preferentially to construct robust interphase,inhibiting solvent decomposition and electrode ***,the optimized electrolyte(1.1 M)with wide liquid range(-70–77℃)conveys decent interfacial compatibility and high-voltage stability(4.6 V for LiNi_(0.6)Mn_(0.2)Co_(0.2)O_(2),NCM622),qualifying reliable operation of practical NCM/graphite pouch cell(81.1%capacity retention over 600 cycles at 0.5 C).The solvation preservation and interface protection from F_(3)B blaze a new avenue for developing high-voltage electrolytes in next-generation LIBs.

关键词： Lithium-ion batteries Solvation structure High-voltage electrolyte Wide-temperature range Interfacial chemistry

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Human-Robot Collaboration Framework Based on Impedance Control in Robotic Assembly

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engineering 2023年第11期30卷 83-92页

作者： Xingwei Zhao Yiming Chen Lu Qian Bo Tao Han Ding State Key Laboratory of Digital Manufacturing Equipment and Technology School of Mechanical Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China

Human–robot(HR)collaboration(HRC)is an emerging research field because of the complementary advantages of humans and *** HRC framework for robotic assembly based on impedance control is proposed in this *** the HRC framework,the human is the decision maker,the robot acts as the executor,while the assembly environment provides *** robot is the main executor to perform the assembly action,which has the position control,drag and drop,positive impedance control,and negative impedance control *** reveal the characteristics of the HRC framework,the switch condition map of different control modes and the stability analysis of the HR coupled system are *** the end,HRC assembly experiments are conducted,where the HRC assembly task can be accomplished when the assembling tolerance is 0.08 mm or with the interference *** show that the HRC assembly has the complementary advantages of humans and robots and is efficient in finishing complex assembly tasks.

关键词： Human-robot collaboration Impedance control Robotic assembly

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Real time tool path smoothing of short linear commands for robot manipulator by constructing asymmetrical Pythagoran-hodograph(PH)splines

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science China(Technological sciences) 2023年第3期66卷 674-688页

作者： YANG JiXiang ADILI Abulikemu DING Han School of Mechanical Science and Engineering State Key Laboratory of Digital Manufacturing Equipment and TechnologyHuazhong University of Science and TechnologyWuhan 430074China

Tool path smoothing of linear commands is important to guarantee the high-order motion continuity of multi-axis motion control *** existing local tool path smoothing methods mainly construct symmetrical splines at transition corners of linear *** the linear segments are short,the symmetrical splines must be shrunk to avoid overlapping,which gives rise to relatively high curvature and low machining *** paper proposes a tool-path smoothing algorithm for serial industrial robots with 6 rotary(6R)joints by constructing asymmetrical Pythagorean-hodograph(PH)***,symmetrical PH splines are initially constructed at transition corners to realize the third-order differential continuity of tool path position and tool *** tip position smoothing errors are constrained by directly evaluating the control polygon length of spline according to the error tolerance in the workpiece coordinate system,while the tool orientation smoothing errors are constrained by adjusting control polygon length after converting tool orientation error to Euler angles using Jacobian *** asymmetrical splines are constructed by dealing with the spline overlapping problem,while guarantying the fully utilization of error tolerance to reduce spline *** position and orientation are synchronized to the arc-length of the tool tip position to ensure the continuity of acceleration and jerk *** control points and arc-length of the constructed asymmetrical splines can all be solved analytically,which makes it suitable for on-line tool path *** demonstrate that the proposed method achieves higher motion efficiency and lower tracking error than the existing symmetrical and asymmetrical tool path smoothing methods,which validates the advantages of the proposed method in high speed machining.

关键词： robot tool path real time interpolation spline

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Reinforcing and toughening mechanism of the in-situ metastable nanostructured alumina-titanium oxide composite coating

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材料科学技术（英文版） 2025年第5期208卷 120-131页

作者： Yu-duo Ma Yong Yang Li-wu Yuan Wei Tian Hongjian Zhao Hebei Key Laboratory of New Functional Materials School of Materials Science and EngineeringState Key Laboratory of Reliability and Intelligence of Electrical EquipmentHebei University of TechnologyTianjin 300401China Hebei Huabei Diesel Engine Co. Ltd.Shijiazhuang 050081China Hebei Key Laboratory of New Functional Materials School of Materials Science and EngineeringState Key Laboratory of Reliability and Intelligence of Electrical EquipmentHebei University of TechnologyTianjin 300401China AECC Sichuan Gas Turbine Establishment Chengdu 610500China

High porosity and high brittleness are the main reasons that limit the long-term service life of the alumina-titanium oxide composite ***,a metastable nanostructured alumina-titanium oxide composite coating with high density and high properties was synthesized by plasma spraying of TiO2-Al composite *** main phases of the metastable nanostructured alumina-titanium oxide were y-Al2O3,TiO and *** coating,as prepared,contains various metastable microstructures,such as fine-grained,intra-/inter-granular,and"self-locking"*** metastable microstruc-tures are important for the improvement of hardness and toughness of the *** with other alumina-based composite coatings,the metastable nanostructured alumina-titanium oxide compos-ite coating showed the most impressive overall *** reinforcing and toughening mechanism of the metastable alumina-titanium oxide composite coating included fine grain strengthening and self-toughening of the metastable microstructure.

关键词： In-situ synthesis Metastable oxide Nanostructured coating Reinforcing and toughening mechanism

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Metal-Backboned Polymer:Conception,Design and Synthesis

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Chinese Journal of Polymer science 2023年第1期41卷 3-6页

作者： Kai-Wen Zeng Hui-Sheng Peng State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science Fudan UniversityShanghai200438China

The backbones of polymers are generally composed of non-metal elements such as C,N,O and *** we propose and synthesize a new class of polymers whose backbones are completely made from metal atoms connected by chemical bonds,and they are thus named metal-backboned *** a demonstration,nickel is selected as the metal to construct the nickel-backboned polymers with varied lengths,which are verified by mass spectrometry and studied by ultraviolet-visible *** metal-bonded polymers open up a new avenue to develop functional polymers in the future.

关键词： Metal-backboned Nickel Functional Polymer

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Spontaneous anchoring Cl intoα-Co(OH)_(2) as efficient and stable oxygen reduction electrocatalysts for seawater battery

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Rare Metals 2024年第7期43卷 3074-3083页

作者： Wang Zheng Xue-Rong Zheng Qi Lu Yan-Hui Cao Yang Wang Hai-Peng Fu Jin-Feng Zhang Yi-Da Deng Wen-Bin Hu School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin UniversityTianjin 300072China State Key Laboratory of Marine Resource Utilization in South China Sea School of Materials Science and EngineeringHainan UniversityHaikou 570228China Key Laboratory of Electromagnetic Processing of Materials Ministry of EducationNortheastern UniversityShenyang 110819China

Seawater battery is an advanced energy storage system that enables conversion of chemical energy to electricity by consuming metals,dissolved oxygen and seawater in anode,cathode and electrolyte,***,the oxygen reduction reaction(ORR)activity and stability of electrocatalysts can be easily deactivated due to the severe Cl~-permeation and corrosion in seawater ***,we developed a structural buffer engineering strategy by spontaneously anchoring Cl~-intoα-Co(OH)_(2) as efficient and stable ORR electrocatalysts,in which the ultrathinα-Co(OH)_(2) nanosheets were synthesized using an ultrafast solution high-temperature shock(SHTS)*** large lattice space(~0.8 nm)of layeredα-Co(OH)_(2) ensured the spontaneously penetration of Cl~-into the lattice structure and replaced part of OH~-to formα-Co(OH)_(2-x)Cl_*** continuous leaching and compensating of saturated Cl inα-Co(OH)_(2-x)Cl_x could enhance the Cl~-corrosion resistance and modulate electronic structure of Co metallic sites,thus improving the ORR electrocatalytic activity and stability in seawater ***α-Co(OH)_(2-x)Cl_x seawater batteries display superior onset and half-wave potentials of 0.71 and 0.66 V,respectively,which are much better than the counterparts ofα-Co(OH)_(2) and ofβ-Co(OH)_(2) with no Cl~-penetrating and no buffer ***α-Co(OH)_(2-x)Cl_x-based seawater batteries display stable open-circuit potential of 1.69 V and outstanding specific capacity of 1345 mAh·g^(-1).

关键词： Seawater battery Oxygen reduction electrocatalyst Solution high-temperature shock Structural buffer engineering

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A Biologically Inspired Cross-Type Ankle–Foot Exotendon:Assisting Plantarflexion Moment and Movement Stability

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Journal of Bionic engineering 2023年第6期20卷 2633-2645页

作者： Yuyao Liu Ronglei Sun Ying Li Miao Zhang Kaijie Zou State Key Laboratory of Intelligent Manufacturing Equipment and Technology School of Mechanical Science and EngineeringHuazhong University of Science and TechnologyWuhan430074China

Cable-driven ankle–foot exoskeletons have attracted numerous researchers over the previous *** assistive forces of most exoskeletons pulled the back bottom of the shoes,across talocrural and subtalar *** talocrural joint is inherently mediolateral unstable at the plantarflexion position due to its sliding mortise structure,while the subtalar joint allows inversion/*** this paper,a biologically inspired cross-type double-cable-driven ankle–foot exotendon was proposed to assist not only the plantarflexion moment but also the movement *** novel structure was bio-inspired by the behind-calf anatomically symmetric layout and under-foot cross-configuration of the ankle–foot *** examine the combined functions,we conducted a forward pelvis perturbed standing experiment on five subjects without and with exotendon assistance and recorded the biomechanical *** to the unpowered condition,the biological ankle plantarflexion moment was reduced by 39 with 0.1 Nm/kg exotendon assistance for one ***,the forward margin of stability was increased by 17 during the late perturbation period,which indicated the improvement of balance in the sagittal *** addition,the standard deviation of the lateral CoP and three-dimensional marker trajectories for the ankle condylar and heel all descended,which provided evidence for ankle–foot stability *** results suggested that the proposed biological exotendon can provide the compound ankle–foot assistance,reducing plantarflexion moment and improving movement stability.

关键词： Cross-type double-cable-driven Ankle–foot exotendon Exoskeleton Bionic design Muscle arrangement

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