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Physical Layer Security Scheme With AoI-Awareness for Industrial IoT Based on Covert Communications

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IEEE/CAA Journal of Automatica Sinica 2025年第1期 276-278页

作者： Yaping Li Zhi-Xin Liu Jia-Wei Su Ya-Zhou Yuan the key laboratory of Industrial Computer control Engineering of Hebei Province Yanshan University

Dear Editor,Industrial Internet of things(IIoT) is a typical application of cyberphysical system(CPS). In the IIoT, wireless communication is an inevitable trend to replace the deployment-limited wired transmission for cases with large-scale and mobile devices. However, wireless communication gives rise to critical issues related to physical security, such as malicious detections and attacks [1].

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Engineering atomic Rb-N configurations to tune radical pathways for highly selective photocatalytic H2O2 synthesis coupled with biomass valorization

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Journal of Energy Chemistry 2025年第1期100卷 215-225页

作者： Jiaye Li Shuang Pan Yihuang Chen Qiong Liu College of Chemistry and Materials Engineering Wenzhou University Guangdong provincial key laboratory of Chemical Measurement and Emergency Test Technology (China) Institute of Analysis Guangdong Academy of Sciences (China National Analytical CenterGuangzhou)

Photocatalytic oxygen reduction for hydrogen peroxide （H2O2） synthesis presents a green and costeffective production ***,achieving highly selective H2O2synthesis remains challenging,necessitating precise control over free radical reaction pathways and minimizing undesirable oxidative ***,we report for the visible light-driven simultaneous co-photocatalytic reduction of O2to H2O2and oxidation of biomass using the atomic rubidium-nitride modified carbon nitride（CNRb）.The optimized CNRb catalyst demonstrates a record photoreduction rate of 8.01 mM h-1for H2O2generation and photooxidation rate of 3.75 mM h-1for furfuryl alcohol to furoic acid,achieving a remarkable solar-to-chemical conversion （SCC） efficiency of up to 2.27%.Experimental characterizations and DFT calculation disclosed that the introducing atomic Rb–N configurations allows for the high-selective generation of superoxide radicals while suppressing hydroxyl free radical *** is because the Rb–N serves as the new alternative site to perceive a stronger connection position for O2adsorption and reinforce the capability to extract protons,thereby triggering a high selective redox product *** study holds great potential in precisely regulating reactive radical processes at the atomic level,thereby paving the way for efficient synthesis of H2O2coupled with biomass valorization.

关键词： Atomic economy Radical pathway regulation Rubidium atom coordination Biomass valorization

Revisited dynamic modeling and eigenvalue analysis of the cable-stayed beam

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Acta Mechanica Sinica 2020年第4期36卷 950-963页

作者： Lianhua Wang Xiaoyu Zhang Kai He Jian Peng College of Civil Engineering Hunan UniversityChangsha 410082China key laboratory for wind and Bridge Engineering of hunan Province Hunan UniversityChangsha 410082China Guangxi Communications Design Group Co. LtdNanning 530022China hunan provincial key laboratory of Structures for wind resistance and vibration control Hunan University of Science and TechnologyXiangtan 411201China

In this study,the Hamilton’s principle is applied to revisit the dynamic modeling of the cable-stayed beam,and the motion equations governing the nonlinear response of the cable-stayed beam are *** corresponding boundary terms are transformed to the dynamic equilibrium conditions through the continuity of the displacement at the anchoring *** the standard condensation procedure,the condensed model of the cable-stayed beam is *** eigenvalue analysis is performed to determine the closed-form eigenvalue solution of the linear problems,and two types of eigenvalue solution are *** is shown that the frequency spectrum of the cable-stayed beam exhibits the curve veering and crossover *** to these phenomena,the mode shapes of the cable-stayed beam may exhibit the coupling ***,the discrete model of the cable-stayed beam is determined,and the possible nonlinear interactions are discussed.

关键词： Cable-stayed beam Dynamic modeling Natural frequencies Mode shapes Curve veering

Inhibiting ceramide synthase 5 expression in microglia decreases neuroinflammation after spinal cord injury

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Neural Regeneration Research 2025年第10期20卷 2955-2968页

作者： Wei Zhang Yubao Lu Ruoqi Shen Yingjie Wu Chenrui Liu Xingxing Fang Liangming Zhang Bin Liu Limin Rong Department of Spine Surgery The Third Affiliated HospitalSun Yat-sen UniversityGuangzhouGuangdong ProvinceChina National Medical Products Administration(NMPA)key laboratory for Quality Research and Evaluation of Cell Products GuangzhouGuangdong ProvinceChina Guangdong provincial Center for Quality control of Minimally Invasive Spine Surgery GuangzhouGuangdong ProvinceChina Guangdong provincial Center for Engineering and Technology Research of Minimally Invasive Spine Surgery GuangzhouGuangdong ProvinceChina

Microglia,the resident monocyte of the central nervous system,play a crucial role in the response to spinal cord ***,the precise mechanism remains *** investigate the molecular mechanisms by which microglia regulate the neuroinflammatory response to spinal cord injury,we performed single-cell RNA sequencing dataset analysis,focusing on changes in microglial *** found that the MG1 subpopulation emerged in the acute/subacute phase of spinal cord injury and expressed genes related to cell pyroptosis,sphingomyelin metabolism,and neuroinflammation at high ***,we established a mouse model of contusive injury and performed intrathecal injection of siRNA and molecular inhibitors to validate the role of ceramide synthase 5 in the neuroinflammatory responses and pyroptosis after spinal cord ***,we established a PC12-BV2 cell co-culture system and found that ceramide synthase 5 and pyroptosis-associated proteins were highly expressed to induce the apoptosis of neuron *** ceramide synthase 5 expression in a mouse model of spinal cord injury effectively reduced ***,ceramide synthase 5-induced pyroptosis was dependent on activation of the NLRP3 signaling *** ceramide synthase 5 expression in microglia in vivo reduced neuronal apoptosis and promoted recovery of neurological ***2g7 formed a“bridge”between sphingolipid metabolism and ceramide synthase 5-mediated cell death by inhibiting the NLRP3 signaling ***,these findings suggest that inhibiting ceramide synthase 5 expression in microglia after spinal cord injury effectively suppressed microglial pyroptosis mediated by NLRP3,thereby exerting neuroprotective effects.

关键词： ceramide synthase 5 gasdermin D microglia neuroinflammation NLRP3 nuclear factor kappa B Pla2g7 pyroptosis sphingomyelin metabolism spinal cord injury

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Bandgap characteristics analysis and graded design of a novel metamaterial for flexural wave suppression

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 1-24页

作者： Fan YANG Zhaoyang MA Xingming GUO Shanghai key laboratory of Mechanics in Energy Engineering Shanghai Institute of Applied Mathematics and Mechanics School of Mechanics and Engineering ScienceShanghai University Shanghai Institute of Aircraft Mechanics and control

A novel elastic metamaterial is proposed with the aim of achieving lowfrequency broad bandgaps and bandgap regulation. The band structure of the proposed metamaterial is calculated based on the Floquet-Bloch theorem, and the boundary modes of each bandgap are analyzed to understand the effects of each component of the unit cell on the bandgap formation. It is found that the metamaterials with a low elastic modulus of ligaments can generate flexural wave bandgaps below 300 Hz. Multi-frequency vibrations can be suppressed through the selective manipulation of bandgaps. The dual-graded design of metamaterials that can significantly improve the bandgap width is proposed based on parametric studies. A new way that can regulate the bandgap is revealed by studying the graded elastic modulus in the substrate. The results demonstrate that the nonlinear gradient of the elastic modulus in the substrate offers better bandgap performance. Based on these analyses, the proposed elastic metamaterials can pave the way for multi-frequency vibration control, low-frequency bandgap broadening, and bandgap tuning.

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Investigation on damage mechanism of compressor blades in turboshaft engine induced by ice impacts at various locations

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Acta Mechanica Sinica 2024年第7期40卷 181-194页

作者： Hao Niu Chao Li Anhua Chen Guangfu Bin Lun Long hunan provincial key laboratory of Health Maintenance for Mechanical Equipment Hunan University of Science and TechnologyXiangtan 411201China AECC HAPRI key laboratory of Aero-engine vibration Technology Zhuzhou 412000China

Ice causes impact damage to different positions of the compressor blade,destroys the structural integrity of the rotor structure,and then causes unbalanced failure and even causes nonlinear vibration accidents such as collision and friction,which affects the execution of helicopter *** investigate the influence of impact position on the damage form and dynamic response of blades during ice impact,a dynamic model by finite element-smooth particle fluid dynamic coupling method is *** ice impact damage experiment of the TC4 plate based on the air gun experimental platform was carried out to verify the reliability of the simulation *** damage of compressor blades impacted by ice from different positions under static and design speed of 45000 r/min is *** research results indicate that under static conditions,the damage caused by ice impact from the leading edge blade tip to the leading edge blade root first increases and then decreases,with the maximum damage occurring at the 66.7%blade height position on the leading *** the design speed,the closer the impact locations are to the leaf tip,the greater the damage is,and the plastic damage,equivalent stress,and kinetic energy loss of the ice impact are lower than the blade static *** research conclusion can provide theoretical reference and data support for the design of structural strength and protection of compressor blades in turboshaft engines.

关键词： Turboshaft engine Compressor blade Ice Impact damage simulation Dynamic response

Enhanced galloping energy harvester with cooperative mode of vibration and collision

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Applied Mathematics and Mechanics(English Edition) 2022年第7期43卷 945-958页

作者： Qiong WANG Zewen CHEN Linchuan ZHAO Meng LI Hongxiang ZOU Kexiang WEI Xizheng ZHANG Wenming ZHANG hunan provincial key laboratory of Vehicle Power and Transmission System Hunan Institute of EngineeringXiangtan 411104Hunan ProvinceChina State key laboratory of Mechanical System and vibration School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China

The low power and narrow speed range remain bottlenecks that constrain the application of small-scale wind energy *** paper proposes a simple,lowcost,and reliable method to address these critical issues.A galloping energy harvester with the cooperative mode of vibration and collision(GEH-VC)is presented.A pair of curved boundaries attached with functional materials are introduced,which not only improve the performance of the vibration energy harvesting system,but also convert more mechanical energy into electrical energy during *** beam deforms and the piezoelectric energy harvester(PEH)generates electricity during the flow-induced *** addition,the beam contacts and separates from the boundaries,and the triboelectric nanogenerator(TENG)generates electricity during the *** order to reduce the influence of the boundaries on the aerodynamic performance and the feasibility of increasing the working area of the TENG,a vertical structure is *** the wind speed is high,the curved boundaries maintain a stable amplitude of the vibration system and increase the frequency of the vibration system,thereby avoiding damage to the piezoelectric sheet and improving the electromechanical conversion efficiency,and the TENG works with the PEH to generate *** the boundaries can protect the PEH at high wind speeds,its stiffness can be designed to be low to start working at low wind *** electromechanical coupling dynamic model is established according to the GEH-VC operating principle and is verified *** results show that the GEH-VC has a wide range of operating wind speeds,and the average power can be increased by 180%compared with the traditional galloping *** GEH-VC prototype is demonstrated to power a commercial temperature *** study provides a novel perspective on the design of hybrid electromechanical conversion mechanisms,that is,to combine and collaborate based on their respective char

关键词： energy harvesting wind energy galloping piezoelectric energy harvester(PEH)

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Enhanced triboelectric output of PDMS-based composite film with bi-material filling and surface patterning

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Science China(Technological Sciences) 2023年第10期66卷 2930-2941页

作者： LIU Sheng LIAO SiHua LIU Dan ZHAO Rong ZHOU Teng YAN WenYuan WEI KeXiang ZOU HongXiang ZHAO LinChuan hunan provincial key laboratory of Vehicle Power and Transmission System Hunan Institute of EngineeringXiangtan 411104China State key laboratory of Mechanical System and vibration School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China

Triboelectric nanogenerators(TENGs)are highly promising energy-harvesting devices that exhibit considerable potential for use in self-powered wearable ***/microfillers and surface microstructure modification have been proposed to improve the triboelectric performance of *** this work,performance-enhanced flexible polydimethylsiloxane(PDMS)was developed through bi-material(reduced graphene oxide/fluorinated ethylene propylene,rGO/FEP)modification and filtrationmembrane-patterned surface *** rGO/FEP with high charge-inducing and-trapping capabilities can be used as the dielectric-enhanced filler for improving *** micro-dents of 5–50μm are created on the modified PDMS surface with an increased contact area of *** with the pure PDMS,the modified PDMS film-based TENG could deliver a substantial enhancement in power density(0.87 mW cm^(-2))by 28 ***,the versatility of this device is demonstrated in human activity monitoring and capacitor *** work provided a simple,high-tunability,and scalable approach for improving the output performance of TENGs for biomechanical energy-harvesting devices that can be integrated into self-powering wearable electronics.

关键词： triboelectric nanogenerator energy harvesting wearable sensor dielectric enhancement surface modification

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An NIR-Ⅱ-emissive Ru(Ⅱ) metallacycle for efficient and safe immunotherapy

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Science China Chemistry 2025年第01期 5-7页

作者： Chonglu Li Jianbo Zhan Biao Dong Institute of Health Inspection and Testing Hubei Provincial Center for Disease Control and Prevention State key laboratory on Integrated Optoelectronics College of Electronic Science and Engineering Jilin University

Immunotherapy, as a groundbreaking cancer treatment, has gained considerable attention for its utilization of the body’s immune system to combat tumors [1]. This therapy induces tumor cell apoptosis, triggering a sustained anti-tumor immune response and effectively preventing tumor recurrence and metastasis [2]. The fundamental principle lies in inducing tumor cell death through specific treatment modalities, leading to the release of a cascade of signaling molecules and antigens, thereby mobilizing the immune system to actively identify and attack tumor cells [3].

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