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Enhanced mechanical and electrical properties of multi-walled carbon nanotubes reinforced Cu/Ti_(3)SiC_(2)/C nanocomposites via high-pressure torsion

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Transactions of Nonferrous Metals Society of China 2024年第12期34卷 4005-4019页

作者： Zi-xuan WU Pei-fan ZHANG Xiao-song JIANG Hong-liang SUN Yan-jun LI Pål CHRISTIAN Liu YANG Key Laboratory of Advanced Technologies of Materials Ministry of EducationSouthwest Jiaotong UniversityChengdu 610031China School of Materials Science and Engineering Southwest Jiaotong UniversityChengdu 610031China School of Engineering and Materials Science Queen Mary University of LondonLondon E14NSUnited Kingdom Teaching and Research Support Center Naval Aviation UniversityYantai 264001China Department of Materials Science and Engineering Norwegian University of Science and TechnologyTrondheim 7491Norway Institute for Applied Materials Karlsruhe Institute of TechnologyKarlsruhe 76131Germany

In order to achieve combined mechanical and electrical properties,multi-walled carbon nanotubes(MWCNTs)reinforced Cu/Ti_(3)SiC_(2)/C nanocomposites were further processed by high-pressure torsion(HPT).The maximum microhardness values of central and edge from the composites with 1 wt.%MWCNTs reached HV 130.0 and HV 363.5,which were 43.9%and 39.5%higher than those of the original samples,*** the same content of MWCNTs,its electrical conductivity achieved 3.42×10^(7) S/m,which was increased by 78.1%compared with that of original *** synergistic improvement of mechanical and electrical properties is attributed to the obtained microstructure with increased homogenization and refinement,as well as improved interfacial bonding and reduced *** strengthening mechanisms include dispersion and refinement strengthening for mechanical properties,as well as reduced electron scattering for electrical properties.

关键词： Cu/Ti_(3)SiC_(2)/C nanocomposites multi-walled carbon nanotubes high-pressure torsion microstructure microhardness electrical conductivity

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Research on measurement method of six degree of freedom for head based on safetr of aircraft pilot seat

Research on measurement method of six degree of freedom for ...

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CSAA/IET International Conference on Aircraft Utility Systems 2020, AUS 2020

作者： Luo, Guo-Xiong Jin, Zhi-Sheng Xie, Wu-Jun Wang, Ru-Bing Aviation Key Laboratory of Science and Technology on Life-Support Technology Hubei Xiangyang China AVIC Aerospace Life-Support Industries Ltd. Hubei Xiangyang China

ISBN: (纸本)9781839535635

In order to ensure the safety of the pilot's life, the six degree of freedom data of the ATD head need to be obtained through dynamic impact test to evaluate the possibility of head injury in the cockpit. A binocular photogrammetry method by the simplified solution of normal equation based on bundle adjustment was proposed. On the basis of satisfying the imaging requirements of high-speed cameras, the 3D position and posture data of the head were obtained by shooting and analyzing the images of the test process. © 2020 Institution of Engineering and technology. All rights reserved.

关键词： Degrees of freedom (mechanics)

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Space aquatic chemistry:A roadmap for drinking water treatment in microgravity

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Environmental science and Ecotechnology 2024年第3期19卷 26-28页

作者： Baiwen Ma Yaohui Bai Chengzhi Hu Beizhen Xie Junya Zhang Mathias Ulbricht Libing Zheng Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing100085China Lehrstuhl für Technische Chemie II Universität Duisburg-EssenEssen45117Germany Institute of Environmental Biology and Life Support Technology School of Biological Science and Medical EngineeringBeihang UniversityBeijing100191China Department of Water Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing100085China Department of Isotope Biogeochemistry Helmholtz Centre for Environmental Research-UFZLeipzig04318Germany

Rapid advancement in aerospace technology has successfully enabled long-term life and economic activities in space,particularly in Low Earth Orbit(LEO),extending up to 2000 km from the mean sea ***,the sustainance of the LEO Economy and its Environmental Control and life support System(ECLSS)still relies on a regular cargo supply of essential commodities(e.g.,water,food)from Earth,for which there still is a lack of adequate and sustainable *** key challenge in this context is developing water treatment technologies and standards that can perform effectively under microgravity *** this technical challenge will be a milestone in providing a scientific basis and the necessary support mechanisms for establishing permanent bases in outer space and *** identify clues towards solving this challenge,we looked back at relevant scientific research exploring novel technologies and standards for deep space exploration,also considering feedback for enhancing these technologies on *** our findings,we share our outlook for the future of drinking water treatment in *** also bring up a new concept for space aquatic chemistry,considering the closed environment of engineered systems operating in microgravity.

关键词： Microgravity Drinking water treatment Water quality Challenges Strategies

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Supermaneuverable Flipping Control and Planning Based on Multi-Rotor Mode of Tilt-Rotor UAVs

Supermaneuverable Flipping Control and Planning Based on Mul...

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IEEE International Conference on Robotics and Biomimetics

作者： Hongpeng Wang Qinghao Zhang Yue Fei Kun Deng Jun Liang Chuanyu Sun Li Xu The Key Laboratory of Civil Aviation Smart Airport Theory and System Civil Aviation University of China College of Artificial Intelligence Nankai University Tianjin China Laboratory of Science and Technology on Integrated Logistics Support National University of Defense Technology Changsha China Institute of Intelligence Technology and Robotic Systems Shenzhen Research Institute of Nankai University Shenzhen China China Nuclear Power Technology Research Institute Co. Ltd Shenzhen China

ISBN: (数字)9798331509644

ISBN: (纸本)9798331509651

Maneuverability is a critical factor for UAV s to survive in high-intensity combat scenarios. Traditional UAV s typically operate in a stable motion state to ensure flight safety. However, in highly contested environments, special missions require high mobility while maintaining safety. Tilt-rotor UAV s, which combine the characteristics of fixed-wing and multi-rotor UAVs, can perform extreme maneuvers, such as high angles of attack and post-stall maneuvers, to rapidly change posture and complete tasks like positioning and defense. Therefore, integrating and optimizing safety and maneuverability metrics is necessary for enabling UAV s to achieve extreme maneuverability. In this paper, extreme maneuver planning and control for tilt-rotor UAV s are realized through a method based on third-order Bezier curve planning of body angular velocity. Experimental results demonstrate tilt-rotor UAVs can perform extreme super-maneuverable flips while maintaining overall process control.

关键词： Measurement Biomimetics Process control Autonomous aerial vehicles Angular velocity Planning Safety Kalman filters Robots

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猕猴脑网络组图谱:包含分区、连接和组织学的多层面全新大脑地图

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science Bulletin 2024年第14期69卷 2241-2259页

作者：陆玉恒崔玥曹龙董振伟程禄祺吴雯王昌硕刘新异刘有通张宝贵李德莹赵舶凯王海艳李开心马亮时维阳李雯马亚伟杜宗昌张佳琪熊辉罗娜刘妍妍侯肖逍韩景路孙洪吉蔡涛彭强冯琳清王骄健 George Paxinos 杨正宜樊令仲蒋田仔 Brainnetome Center Institute of AutomationChinese Academy of SciencesBeijing 100190China School of Artificial Intelligence University of Chinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China Henan Key Laboratory of Imaging and Intelligent Processing PLA Strategic Support Force Information Engineering UniversityZhengzhou 450001China Neuroscience Research Australia and The University of New South Wales Sydney NSW 2031Australia Key Laboratory for NeuroInformation of the Ministry of Education School of Life Science and TechnologyUniversity of Electronic Science and Technology of ChinaChengdu 610054China State Key Laboratory of Primate Biomedical Research Institute of Primate Translational MedicineKunming University of Science and TechnologyKunming 650500China School of Mechanical and Power Engineering Harbin University of Science and TechnologyHarbin 150080China School of Life and Environmental Sciences Guilin University of Electronic TechnologyGuilin 541004China Sino-Danish College University of Chinese Academy of ScienceBeijing 100049China Research Center for Augmented Intelligence Zhejiang LabHangzhou 311100China Xiaoxiang Institute for Brain Health and Yongzhou Central Hospital Yongzhou 425000China

The rhesus macaque(Macaca mulatta)is a crucial experimental animal that shares many genetic,brain organizational,and behavioral characteristics with humans.A macaque brain atlas is fundamental to biomedical and evolutionary ***,even though connectivity is vital for understanding brain functions,a connectivity-based whole-brain atlas of the macaque has not previously been *** this study,we created a new whole-brain map,the Macaque Brainnetome Atlas(MacBNA),based on the anatomical connectivity profiles provided by high angular and spatial resolution ex vivo diffusion MRI *** new atlas consists of 248 cortical and 56 subcortical regions as well as their structural and functional *** parcellation and the diffusion-based tractography were evaluated with invasive neuronal-tracing and Nissl-stained *** a demonstrative application,the structural connectivity divergence between macaque and human brains was mapped using the Brainnetome atlases of those two species to uncover the genetic underpinnings of the evolutionary changes in brain *** resulting resource includes:(1)the thoroughly delineated Macaque Brainnetome Atlas(MacBNA),(2)regional connectivity profiles,(3)the postmortem high-resolution macaque diffusion and T2-weighted MRI dataset(Brainnetome-8),and(4)multi-contrast MRI,neuronal-tracing,and histological images collected from a single *** can serve as a common reference frame for mapping multifaceted features across modalities and spatial scales and for integrative investigation and characterization of brain organization and ***,it will enrich the collaborative resource platform for nonhuman primates and facilitate translational and comparative neuroscience research.

关键词： Macaca mulatta Brain atlas Connectivity-based parcellation Diffusion MRI Cytoarchitecture Cross-species comparison

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Augmented Reality-Based Digital-Physical Space Registration and Projection for Cognitive Enhancement and Assessment

Augmented Reality-Based Digital-Physical Space Registration ...

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IEEE International Conference on Robotics and Biomimetics

作者： Hongpeng Wang Yue Fei Qinghao Zhang Kun Deng Jun Liang Chuanyu Sun Li Xu The Key Laboratory of Civil Aviation Smart Airport Theory and System Civil Aviation University of China College of Artificial Intelligence. Nankai University Tianjin China Laboratory of Science and Technology on Integrated Logistics Support National University of Defense Technology Changsha China Institute of Intelligence Technology and Robotic Systems Shenzhen Research Institute of Nankai University Shenzhen China China Nuclear Power Technology Research Institute Co. Ltd. Shenzhen China

ISBN: (数字)9798331509644

ISBN: (纸本)9798331509651

Driven by information technology, mod-ern warfare is more diverse and intelligent than traditional warfare, in which intelligent unmanned system plays an increasingly important role. To defend against distant threat of unmanned military arma-ments, it's essential to deploy radars, sonars, satellites, and other long-range detection equipment to build a multidimensional national defense monitoring system. Due to the unpredictable nature of battlefield, radar-based reconnaissance missions require operators to have extensive experience and maintain a high level of focus. However, prolonged radar operations may impose a heavy psychological burden on operators and even affect their mental functions. To address these challenges, this paper proposes a cognitive en-hancement and assessment system that projects virtual 3D battlefield scenarios onto the real world based on augmented reality and evaluates operators' mental state through eye-tracking technology.

关键词： Three-dimensional displays Satellites Spaceborne radar Virtual environments Sonar Reconnaissance Robot sensing systems Radar equipment Monitoring Sonar detection

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Human lunar base:“Lunar Palace 1”team of Beihang University unveils China’s“Lunar Palace”plan

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The Innovation 2024年第2期5卷 3-4页

作者： Hui Liu Zhikai Yao Hong Liu Institute of Environmental Biology and Life Support Technology School of Biological Science and Medical EngineeringBeihang UniversityBeijing 100083China Internet Joint Research Center of Aerospace Biotechnology&Medical Engineering Beihang UniversityBeijing 100083China State Key Laboratory of Virtual Reality Technology and Systems School of Computer Science and EngineeringBeihang UniversityBeijing 100083China

Recently,the“Lunar Palace 1”team of Beihang University,China,in response to the long-term habitation and healthcare of humans on the Moon,released the“Lunar Palace”plan through the official account“Beihang University”on WeChat’s video *** the development of crewed deep-space exploration,human permanent residence on the Moon is no longer an unattainable dream but an anticipated *** on the Moon will live in a Lunar Palace equipped with a bioregenerative life support system(BLSS),creating an Earth-like environment,much like the Lunar Palace 1 facility on Earth.

关键词： Earth Human equipped

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Nonlinear Dynamic Modeling and Body Injuries Analysis of Human/Seat System Under Vertical Impact

SSRN

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SSRN 2022年

作者： Xiao, Huiting Wang, Kejie Liu, Yongshou Guo, Qing Wen, Yongshuai Feng, Zhijie School of Mechanics Civil Engineering and Architecture Northwestern Polytechnical University Xi’an710129 China Aviation Key Laboratory of Science and Technology on Life-Support Technology AVIC Aerospace Lifesaving Equipment Co. Ltd. Xiangyang441000 China

Predicting the responses and injuries of seated pilots caused by emergency landing or ejection is significant for the design of ejection seats. A nonlinear two-dimensional multi-body human/seat model is proposed to predict the responses and body injuries exposed to vertical impact. Then a new force identification method is presented and applied to obtain the external excitation of the system. In addition, the parameters of this model are optimized based on the Error Assessment of Response Time Histories (EARTH) metric and Non-dominated Sorting Genetic Algorithm II (NSGA-II). Furthermore, utilizing the proposed model, this research predicts body injuries with different impact intensities. With body injuries as output, the influence of input parameters is assessed by global sensitivity analysis (GSA) methods. The result shows that the backrest angle plays a crucial role in body injuries. Finally, the influence of backrest angle is further analyzed to obtain the variation of body injuries with backrest angle. This research provides guiding principles for the subsequent design of ejection seats. © 2022, The Authors. All rights reserved.

关键词： Ejection seats

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Simulation study on dynamic opening characteristics of airplane drag chute under the condition of stable crosswind

Simulation study on dynamic opening characteristics of airpl...

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CSAA/IET International Conference on Aircraft Utility Systems 2020, AUS 2020

作者： Jin, Lou Yang, Pin Hu, Xuepeng Li, Hui Zhang, Linling Cui, Dongyue Aviation Key Laboratory of Science and Technology on Life-support Technology Xianyang China AVIC Aerospace Life-support Industries Ltd. Xianyang China AVIC The First Aircraft Institute Institute of Mechanical and Electrical System Xi'an China

ISBN: (纸本)9781839535635

In this paper, the ALE fluid-solid coupling algorithm is used to realize the simulation of the dynamic opening process of a certain type of airplane drag parachute. Based on the drag parachute working principle and folding process, a finite element model of the main parachute in the installed state is established. In the LS-DYNA software, the parachute opening characteristics of the drag parachute were simulated and analyzed under no crosswind conditions and Stable crosswind conditions at speed 10m/s. The results show that, under the condition of no crosswind, the error of the important parameters such as parachute straightening force, parachute opening dynamic load, parachute deflection angle and test data is less than 15%, and the simulation accuracy meets the engineering development requirements. On this basis, the parameters such as the unfolding shape, deflection angle, and stress state of the parachute parachute under stable crosswind conditions, which are difficult to test and simulate, were studied. This will provide a theoretical basis and technical approach for drag chute design and other types of parachute product research. © 2020 Institution of Engineering and technology. All rights reserved.

关键词： Product design

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A Cullin 5-based complex serves as an essential modulator of ORF9b stability in SARS-CoV-2 replication

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Signal Transduction and Targeted Therapy 2024年第7期9卷 3112-3129页

作者： Yuzheng Zhou Zongpeng Chen Sijie Liu Sixu Liu Yujie Liao Ashuai Du Zijun Dong Yongxing Zhang Xuan Chen Siyi Tao Xin Wu Aroona Razzaq Gang Xu De-an Tan Shanni Li Youwen Deng Jian Peng Shuyan Dai Xu Deng Xianwen Zhang Taijiao Jiang Zheng Zhang Gong Cheng Jincun Zhao Zanxian Xia Department of Cell Biology School of Life SciencesCentral South University410013 ChangshaChina Institute for Hepatology National Clinical Research Center for Infectious DiseaseShenzhen Third People’s HospitalThe Second Affiliated HospitalSchool of MedicineSouthern University of Science and Technology518112 ShenzhenChina Department of Basic Medicine School of MedicineHunan Normal University410081 ChangshaChina Department of spine surgery The Third Xiangya HospitalCentral South University410013 ChangshaChina School of Basic Medical Sciences Anhui Medical University230032 HefeiChina Hunan Key Laboratory of Neurorestoratology 921 Hospital of Joint Logistics Support Force People’s Liberation Army of China(The Second Affiliated Hospital of Hunan Normal University)410003 ChangshaHunanChina Department of Geriatric Surgery Xiangya HospitalCentral South University410008 ChangshaChina Xiangya School of Pharmaceutical Sciences Central South University410013 ChangshaChina Institute of Infectious Diseases Shenzhen Bay Laboratory518132 ShenzhenChina Guangzhou Laboratory 510005 GuangzhouChina Tsinghua University-Peking University Joint Center for Life Sciences School of MedicineTsinghua University100084 BeijingChina State Key Laboratory of Respiratory Disease National Clinical Research Center for Respiratory DiseaseGuangzhou Institute of Respiratory HealthThe First Affiliated Hospital of Guangzhou Medical University510120 GuangzhouChina Hunan Key Laboratory of Animal Models for Human Diseases Hunan Key Laboratory of Medical Genetics&Center for Medical GeneticsSchool of Life SciencesCentral South University410008 ChangshaChina

The ORF9b protein,derived from the nucleocapsid’s open-reading frame in both SARS-CoV and SARS-CoV-2,serves as an accessory protein crucial for viral immune evasion by inhibiting the innate immune *** its significance,the precise regulatory mechanisms underlying its function remain *** the present study,we unveil that the ORF9b protein of SARS-CoV-2,including emerging mutant strains like Delta and Omicron,can undergo ubiquitination at the K67 site and subsequent degradation via the proteasome pathway,despite certain mutations present among these ***,our investigation further uncovers the pivotal role of the translocase of the outer mitochondrial membrane 70(TOM70)as a substrate receptor,bridging ORF9b with heat shock protein 90 alpha(HSP90α)and Cullin 5(CUL5)to form a *** this complex,CUL5 triggers the ubiquitination and degradation of ORF9b,acting as a host antiviral factor,while HSP90αfunctions to stabilize ***,treatment with HSP90 inhibitors such as GA or 17-AAG accelerates the degradation of ORF9b,leading to a pronounced inhibition of SARS-CoV-2 ***-cell sequencing data revealed an up-regulation of HSP90αin lung epithelial cells from COVID-19 patients,suggesting a potential mechanism by which SARS-CoV-2 may exploit HSP90αto evade the host *** study identifies the CUL5-TOM70-HSP90αcomplex as a critical regulator of ORF9b protein stability,shedding light on the intricate host–virus immune response dynamics and offering promising avenues for drug development against SARS-CoV-2 in clinical settings.

关键词： stability modulator offering

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