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Sinusoidally architected helicoidal composites inspired by the dactyl club of mantis shrimp

International Journal of Smart and Nano Materials 2023年第3期14卷 321-336页

作者： Ruiheng Yang Huitian Wang Bing Wang Sheng Zhang Zhiping Huang Sha Yin Department of Automotive Engineering School of Transportation Science and EngineeringBeihang UniversityBeijing 100191China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbinChina WAY Business Solutions GmbH Jiangsu Changshu Automotive Trim Group Co.LtdChangshuChina

The impact region of the dactyl club of mantis shrimp features a rare sinusoidally helicoidal architecture,contributing to its efficient impact-resistant *** study aims to attain bioinspired sinusoidally architected composites from a practical engineering *** features of plain-woven fabric were characterized,which demonstrated that the interweaving warp and weft yarns exhibited a sinusoidal *** woven composites were thus employed and helicoidally stacked to achieve the desired ***-static three-point bending and low-velocity impact tests were subsequently performed to evaluate their mechanical *** three-point bending condi-tion,the dominant failure mode gradually changed from fiber breakage to delamination with the increase in the pitch *** displacement and energy absorption of the heli-coidal woven composites were,respectively,43.89%and 141.90%greater than the unidirectional *** low-velo-city impact condition,the damage area of the helicoidal woven composites decreased by 49.66%while the residual strength increased by 10.10%compared with those of the unidirectional ones,exhibiting better damage resistance and ***,effects of fiber architecture on mechanical properties were *** work will shed light on future design of the next-generation impact-resistant architected composites.

关键词： Bioinspired composites architected materials thermoplastic composites mechanical properties impact behavior

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Widely tunable 2μm optical vortex from a Tm:YAP laser

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Chinese Optics Letters 2023年第10期21卷 55-59页

作者：周晶晶郑昌盛陈彬张宁高庆港袁航琪贾代文王占新刘善德张玉萍张会云赵永光 Jiangsu Key Laboratory of Advanced Laser Materials and Devices Jiangsu Normal UniversityXuzhou 221116China College of Electronic and Information Engineering Shandong University of Science and TechnologyQingdao 266590China Jiangsu Collaborative Innovation Center of Advanced Laser Technology and Emerging Industry Jiangsu Normal UniversityXuzhou 221116China

In this paper,we report on a wide wavelength tuning optical vortex carrying orbital angular momentum(OAM)of±?,from a thulium-doped yttrium aluminum perovskite(YAP)laser employing a birefringent *** OAM is experimentally found to be well maintained during the whole wavelength tuning *** Laguerre-Gaussian(LG_(0,+1))mode with a tuning range of 58 nm from 1934.8 to 1993.0 nm and LG0,-1mode with a range of 76 nm from 1920.4 to 1996.6 nm,are,respectively,*** is,to the best of our knowledge,the first experimental implementation of wavelength tuning for a scalar vortex laser in the 2μm spectral range,as well as the broadest tuning range ever reported from the vortex laser *** a vortex laser with robust structure and straightforward wavelength tuning capability will be an ideal light source for potential applications in the field of optical communication with one additional degree of freedom.

关键词： wavelength tunable laser 2μm laser orbital angular momentum

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Fine-Tuning of Structural Distortion and Magnetic Anisotropy by Organosulfonates in Octahedral Cobalt(Ⅱ)Complexes

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Chinese Journal of Chemistry 2022年第18期40卷 2193-2202页

作者： Dong Shao Fang-Xue Xu Lei Yin Hong-Qing Li Yu-Chen Sun Zhong-Wen Ouyang Zhen-Xing Wang Yi-Quan Zhang Xin-Yi Wang State Key Laboratory of Coordination Chemistry Collaborative Innovation Center of Advanced MicrostructuresSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjingJiangsu210023 China Hubei Key Laboratory of Processing and Application of Catalytic Materials College of Chemistry and Chemical EngineeringHuanggang Normal UniversityHuanggangHubei438000 China Jiangsu Key Laboratory for NSLSCS School of Physical Science and TechnologyNanjing Normal UniversityNanjingJiangsu210097 China Wuhan National High Magnetic Field Centre Huazhong University of Science and TechnologyWuhanHubei430074 China

Precise modulation of the magnetic anisotropy of metal ions remains highly important for the development of high–performance single-molecule magnets(SMMs).We herein reported the synthetic,structural,spectral,magnetic,and computational studies on four mononuclear Co^(Ⅱ) complexes in a distorted octahedral *** change of the organosulfonate anions triggers significant modification of the distorted octahedral CoN6 coordination sphere,which enables us to tackle the influence of the structural distortion on the magnetic anisotropy in these *** measurements revealed that the four complexes possess easy–plane magnetic anisotropy with large and positive zero-field splitting parameters,which decrease with the increasing distortion of the pseudo–octahedral Co^(Ⅱ) coordination *** correlation was further confirmed by high–frequency/–field EPR(HF–EPR)spectra and theoretical *** magnetic susceptibility measurements indicate that these complexes both exhibit slow magnetic relaxation under an external dc field,indicating the field-induced single-ion magnets(SIMs)of the four *** results indicate that structural distortion plays an important role in the magnetic anisotropy of CoⅡcomplexes and should be carefully considered in the design of molecular complexes with high magnetic anisotropy.

关键词： Cobalt Solid-state structures Magnetic properties Single-molecule magnets /Magnetic anisotropy

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A Novel Fault Diagnosis Method for Rolling Bearing Based on TVFEMD Energy Entropy and PFA-LSSVM Optimization Model 3

A Novel Fault Diagnosis Method for Rolling Bearing Based on ...

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3rd International Signal Processing, Communications and Engineering Management Conference, ISPCEM 2023

作者： Hu, Zhiping Xu, Yanhe Lu, Junze Jiang, Wei Hubei Bailianhe Pumped Storage Co. Ltd Huanggang438600 China Huazhong University of Science and Technology Hubei Provincial Key Laboratory of Digital Watershed Science and Technology Wuhan430074 China Huaiyin Institute of Technology Jiangsu Key Laboratory of Advanced Manufacturing Technology Huai'an223003 China

ISBN: (纸本)9798350307023

The precision and effectiveness of diagnostic outcomes for rolling bearing faults are crucial for ensuring the reliability and safety of machinery. On the premise of this background, a time-varying filtering based empirical mode decomposition (TVFEMD) energy entropy and pathfinder algorithm (PFA) optimized least squares support vector machine (LSSVM) fault diagnosis method is proposed. Firstly, considering the significant fluctuations that vibration signals exhibit in complex operating conditions, TVFEMD is used to acquire several sets of IMFs. Secondly, to extract crucial information from IMF components that describes the state of the equipment, the energy entropy method can be served to construct the feature vectors that characterize essential fault information. Finally, based on the generated vectors and PFA-LSSVM, the fault classification can be implemented. Relevant experiments are systematically undertaken to elucidate the performance characteristics. The results conspicuously affirm the method's effectiveness and superiority in comparison of the existing approaches. © 2023 IEEE.

关键词： Empirical mode decomposition

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Total conversion of centimeter-scale nickel foam into single atom electrocatalysts with highly selective CO_(2)electrocatalytic reduction in neutral electrolyte

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Nano Research 2023年第2期16卷 2003-2010页

作者： Qikui Fan Pengfei Gao Shan Ren Yunteng Qu Chuncai Kong Jian Yang Yuen Wu Ministry of Education Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter Shaanxi Province Key Laboratory of Advanced Functional Materials and Mesoscopic PhysicsSchool of PhysicsXi’an Jiaotong UniversityXi’an 710049China Shenzhen Key Laboratory of Special Functional Materials Guangdong Research Center for Interfacial Engineering of Functional MaterialsCollege of Materials Science and EngineeringShenzhen UniversityShenzhen 518060China Northwest Institute of Nuclear Technology Xi’an 710024China Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou 215123China State Key Laboratory of Photoelectric Technology and Functional Materials International Collaborative Center on Photoelectric Technology and Nano Functional MaterialsInstitute of Photonics and Photon-TechnologyNorthwest UniversityXi’an 710069China Department of Chemistry iChEM(Collaborative Innovation Center of Chemistry for Energy Materials)University of Science and Technology of ChinaHefei 230026China

To improve the atomic utilization of metals and reduce the cost of industrialization,the one-step total monoatomization of macroscopic bulk metals,as opposed to nanoscale metals,is *** this study,we used a thermal diffusion method to directly convert commercial centimeter-scale Ni foam to porous Ni single-atom-loaded carbon nanotubes(CNTs).As expected,owing to the coating of single-atom on porous,highly conductive CNT carriers,Ni single-atom electrocatalysts(Ni-SACs)exhibit extremely high activity and selectivity in CO_(2)electroreduction(CO_(2)RR),yielding a current density of>350 mA/cm^(2),a selectivity for CO of>91%under a flow cell configuration using a 1 M potassium chloride(KCl)*** on the superior activity of the Ni-SACs electrocatalyst,an integrated gas-phase electrochemical zero-gap reactor was introduced to generate a significant amount of CO current for potential practical *** overall current can be increased to 800 mA,while maintaining CO Faradaic efficiencies(FEs)at above 90%per unit *** findings and insights on the active site transformation mechanism for macroscopic bulk Ni foam conversion into single atoms can inform the design of highly active single-atom catalysts used in industrial CO_(2)RR systems.

关键词： Ni single atom electrocatalyst CO_(2)electroreduction to CO neutral electrolyte thermal diffusion

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Recent advances in the synthesis and applications of furocoumarin derivatives

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Chinese Chemical Letters 2023年第9期34卷 119-133页

作者： Chaoyue Chen Zheng-Bin Tang Zhichang Liu School of Chemistry and Chemical Engineering Jiangsu University of TechnologyChangzhou 213001China Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province Department of ChemistrySchool of Science and Research Center for Industries of the FutureWestlake Universityand Westlake Institute for Advanced StudyHangzhou 310030China

Furocoumarins are an important class of heterocyclic compounds with a fused tricyclic structure of coumarin and furan *** are commonly found in bioactive natural products and have a diverse range of biological and pharmaceutical properties,including cytotoxicity,photosensitivity,insecticidal,antibacterial,and antifungal activity,among *** elegant linear/angular tricyclic skeleton and superior pharmacological properties,make them ideal for building and developing advanced biological scaffolds for biomedical *** a result,the family of furocoumarins has been the focus of intensive research,and lots of encouraging progress have been achieved in recent *** review summarizes the most recent methods reported for the synthesis of the furocoumarin derivative family,along with their applications in medicinal chemistry covering from 2018 to 2022.

关键词： Furocoumarin Coumarin Furan Synthesis Pharmaceutical activity Applications

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A Cross-Shaped Solenoid Magnetic Coupler with High Lateral Offset Tolerance

A Cross-Shaped Solenoid Magnetic Coupler with High Lateral O...

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International Conference on Wireless Power Transfer, ICWPT 2022

作者： Zhang, Chendawei Lu, Wenzhou Zhao, Jian Fan, Qigao Chen, Haiying Jiangnan University Wuxi214122 China School of Mechanical Engineering Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology Jiangnan University Wuxi214122 China

ISBN: (纸本)9789819906307

Wireless power transfer (WPT) technology has been applied in all walks of life on account of its advantages, but most WPT systems have low offset tolerance performance, which hinders its development. In order to further improve the lateral offset tolerance performance of a WPT system with asymmetric magnetic coupler, a cross-shaped solenoid magnetic coupler with higher lateral offset tolerance performance is proposed in this paper. Firstly, the coil structure of the proposed magnetic coupler is optimized and simulated through FEA-based simulations to obtain high lateral offset tolerance performance by making mutual inductance relatively stable with wide range of lateral offset. Then, the analysis of the mutual inductance is proposed to verify the method to reach the purpose. Finally, the LCC-S resonance topology is applied in the proposed WPT system, the experimental results show that the proposed magnetic coupler makes the system output power relatively stable around 51.95 W with a stable maximum efficiency of 72.4% when the lateral offset varies from −9 cm to 9 cm and the transfer distance is 2 cm. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Solenoids

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Robust Practical Stabilization for Complex Dynamical Networks With DoS Attacks and Actuator Saturation

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IEEE Transactions on Systems, Man, and Cybernetics: Systems 2025年第5期55卷 3108-3118页

作者： Shi, Xueya Peng, Zhinan Yu, Junzhi Li, Hongfei Southwest University College of Electronic and Information Engineering Chongqing400715 China Sichuan Artificial Intelligence Research Institute Yibin644000 China University of Electronic Science and Technology of China School of Automation Engineering Chengdu611731 China Peking University State Key Laboratory for Turbulence and Complex Systems Department of Advanced Manufacturing and Robotics College of Engineering Beijing100871 China

This article addresses the problem of designing an attack-resilient adaptive event-triggered (AET) controller for complex dynamical networks (CDNs) under DoS attacks and actuator saturation, with a focus on robust practical stability (RPS). First, considering the impact of DoS attacks on closed-loop systems, an AET controller against DoS attacks is designed. Unlike other event-triggered controllers, the complete timeline is divided, and the AET controller is built with two switching modes based on the intervals of dormant and active periods of DoS attacks in which the system is located. Second, to reconcile AET controller with actuator saturation, a switched system modeling approach is established that explicitly incorporates saturation constraints into the coupled network dynamics. Third, a switched Lyapunov-Krasovskii functional (LKF) is proposed, with which sufficient conditions are provided to ensured the RPS, and a joint design strategy is developed for the desired triggered matrix and feedback gain using linear matrix inequalities (LMIs). Moreover, the results are generalized to the case of actuator faults, indicating that the system is able to achieve RPS with actuator faults. Finally, the proposed method is verified through an example. © 2013 IEEE.

关键词： Lyapunov functions

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Mathematical modeling of salicylate effects on high-purity Mg anode for aqueous primary Mg-Air batteries

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Journal of Magnesium and Alloys 2025年第4期13卷 1506-1522页

作者： Wen Xu Yulong Wu Darya Snihirova Linqian Wang Min Deng Cheng Wang Sviatlana V.Lamaka Mikhail L.Zheludkevich Daniel Höche Institute of Surface Science Helmholtz-Zentrum HereonGeesthacht 21502Germany School of Materials Science and Engineering Hebei University of TechnologyTianjin 300000China School of Materials Science and Engineering&Jiangsu Key Laboratory for Advanced Metallic Materials Southeast UniversityNanjing 211189China Institute for Materials Science Faculty of EngineeringKiel UniversityKiel 24143Germany

This study investigates the effectiveness of salicylate(SAL)as an electrolyte additive on the discharge behavior of high-purity(HP)Mg anode in an aqueous half-cell system,using an integrated approach of mathematical modeling and experimental analysis.A finite elementbased model is developed to elucidate the key mechanisms by which SAL influences the voltage profile and *** electrochemical measurements,especially intermittent discharge tests combined with electrochemical impedance spectroscopy(EIS),demonstrate that SAL can enhance initial voltage stability of HP Mg ***,the model incorporates the SAL-Mg complexation factor to describe the role of SAL in modifying the deposit film on HP Mg *** agreement between model predictions and experimental observations suggests that SAL facilitates the formation of compact Mg(OH)_(2) deposits and sustains a favorable pH environment within the half-cell *** integrated approach provides new insights into understanding and optimizing additive effects for Mg-air batteries.

关键词： Primary Mg-air batteries Salicylate additive Discharge potential Local pH finite element modeling(FEM)

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Shape Optimization of Magnetorheological Brake for Performance Enhancement

Shape Optimization of Magnetorheological Brake for Performan...

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2024 IEEE International Conference on robotics and Biomimetics, ROBIO 2024

作者： Shi, Qiuyu Liu, Fajiang Wu, Xinyu Gao, Fei Southern University of Science and Technology Shenzhen518005 China Shenzhen Institute of Advanced Technology Guangdong Provincial Key Laboratory of Robotics and Intelligent System Chinese Academy of Sciences Shenzhen518055 China Guangdong-Hong Kong-Macao Joint Laboratory of Human-Machine Intelligence-Synergy Systems Shenzhen518055 China

ISBN: (纸本)9781665481090

Magnetorheological (MR) rotary brakes leverage the magnetically controllable rheological properties of MR fluids to provide damping torque in lower limb assistance devices. This paper utilizes an optimization algorithm (Whale Optimization Algorithm (WOA)) to optimize the geometric dimension of the MR brake to enhance field-dependent brake torque. First, the mechanical design and optimization process of the MR brake were outlined. Then, the magnetic density of the MR fluid is evaluated using the ANSYS platform. With that, the WOA was exploited to optimize key design parameters across multiple iterations. According to the simulated results, the torque was improved from 17.39 Nm to 25.89 Nm, which increased by 48%. Finally, a prototype with the initial dimension was fabricated and preliminarily tested. © 2024 IEEE.

关键词： Shape optimization

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