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Design of an aircraft autonomous traction taxiing system based on hydraulic secondary control

Chinese Journal of Aeronautics 2024年第6期37卷 348-359页

作者： Xiaochao LIU Zhongyi QIU Hao ZHang Pengyuan QI zhenyu wang Yaoxing SHang Zongxia JIAO Research Institute for Frontier Science Beihang UniversityBeijing 100083China School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100083China Ningbo Institute of Technology Beihang UniversityNingbo 315800China Tianmushan Laboratory Xixi Octagon CityYuhang DistrictHangzhou 310023China Science and Technology on Aircraft Control Laboratory Beihang UniversityBeijing 100083China Beijing Tianma Intelligent Control Technology Co. Ltd.Beijing 101399China China Coal Research Institute Beijing 100013China

At present,aircraft taxiing at ground airports needs to be provided with a thrust by the main *** taxiing process is inefficient,has high fuel consumption and serious pollution,and is prone to safety *** this paper,a new configuration of aircraft autonomous traction taxiing system is proposed based on the principle of hydraulic secondary control,in which a hydraulic motor drive device is installed at the front wheels of the aircraft to drive the wheels to rotate forward or *** on this,autonomous taxiing can be realized without relying on the main engines,thus greatly improving airport operation ***,this paper analyzes the influencing factors of the autonomous traction taxiing process,and investigates the parameter matching design of the new configuration ***,this paper develops the ground principle prototype,designs the aircraft longitudinal bonding force observer and the aircraft wheel disturbance moment observer,and proposes the speed control method of the aircraft front wheel autonomous traction taxiing by considering the ground bonding force saturation ***,the ground taxiing test is conducted,and the results show that the new configuration proposed in this paper presents a new solution for aircraft autonomous traction taxiing.

关键词： Autonomous traction taxi-ing Hydraulic secondary control Hydraulic motors Saturation characteristics Disturbance observation Speed control

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A Security Trade-Off Scheme of Anomaly Detection System in IoT to Defend against Data-Tampering Attacks

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Computers, Materials & Continua 2024年第3期78卷 4049-4069页

作者： Bing Liu Zhe Zhang Shengrong Hu Song Sun Dapeng Liu zhenyu Qiu Zhejiang Institute of Industry and Information Technology Hangzhou310000China Digital Economy Development Center of Zhejiang Hangzhou310000China College of Computer and Information Science Chongqing Normal UniversityChongqing401331China Bank of Suzhou Suzhou215000China Hangzhou Hikvision Digital Technology Co. Ltd.Hangzhou310051China

Internet of Things(IoT)is vulnerable to data-tampering(DT)*** to resource limitations,many anomaly detection systems(ADSs)for IoT have high false positive rates when detecting DT *** leads to the misreporting of normal data,which will impact the normal operation of *** mitigate the impact caused by the high false positive rate of ADS,this paper proposes an ADS management scheme for clustered ***,we model the data transmission and anomaly detection in clustered ***,the operation strategy of the clustered IoT is formulated as the running probabilities of all ADSs deployed on every IoT *** the presence of a high false positive rate in ADSs,to deal with the trade-off between the security and availability of data,we develop a linear programming model referred to as a security trade-off(ST)***,we develop an analysis framework for the ST model,and solve the ST model on an IoT simulation ***,we reveal the effect of some factors on the maximum combined detection rate through theoretical *** show that the ADS management scheme can mitigate the data unavailability loss caused by the high false positive rates in ADS.

关键词： Network security Internet of Things data-tampering attack anomaly detection

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Rubber-based agroforestry systems modify the soil fungal composition and function in Southwest China

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Soil Ecology Letters 2024年第3期6卷 97-107页

作者： zhenyu Hong Xinai Li Debao Li Jianping wu Ministry of Education Key Laboratory for Transboundary Ecosecurity of Southwest China Yunnan Key Laboratory of Plant Reproductive Adaptation and Evolutionary Ecology and Institute of BiodiversitySchool of Ecology and Environmental ScienceYunnan UniversityKunming 650500China Laboratory of Soil Ecology and Health in Universities of Yunnan Province Yunnan UniversityKunming 650500China Dali University Dali 671003China

Rubber-based agroforestry systems have been recognized as a practical and sustainable solution to promote the development of agriculture and the ***,interactions between fungal communities and these systems are still not sufficiently *** this study,we compared the abundance,diversity,and community composition of soil fungi in four treatments,including rubber monoculture and three rubber-based agroforestry treatments involving intercropping with Camellia sinensis,Coffea liberica,and Theobroma *** results revealed that the community composition exhibited significant variation between the four different treatments,while the overall soilα-diversity was relatively stable across all *** pH and soil organic carbon were significantly related to the structure of the fungal *** particular,the complexity of the functional fungal network increased in response to agroforestry treatments,promoting beneficial fungi and suppressing certain plant *** results suggest that rubber-based agroforestry systems can promote the health of soil microbial community composition,and therefore provide an effective approach to enhancing soil quality.

关键词： agroforestry system with intercropping rubber monoculture fungal community fungal function tropical forest

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Deep Learning Social Network Access Control Model Based on User Preferences

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Computer Modeling in Engineering & Sciences 2024年第7期140卷 1029-1044页

作者： Fangfang Shan Fuyang Li zhenyu wang Peiyu Ji Mengyi wang Huifang Sun School of Computer Science Zhongyuan University of TechnologyZhengzhou450007China Henan Key Laboratory of Cyberspace Situation Awareness Zhengzhou450001China

A deep learning access controlmodel based on user preferences is proposed to address the issue of personal privacy leakage in social ***,socialusers andsocialdata entities are extractedfromthe social networkandused to construct homogeneous and heterogeneous ***,a graph neural networkmodel is designed based on user daily social behavior and daily social data to simulate the dissemination and changes of user social preferences and user personal preferences in the social ***,high-order neighbor nodes,hidden neighbor nodes,displayed neighbor nodes,and social data nodes are used to update user nodes to expand the depth and breadth of user ***,a multi-layer attention network is used to classify user nodes in the homogeneous graph into two classes:allow access and deny *** fine-grained access control problem in social networks is transformed into a node classification problem in a graph neural *** model is validated using a dataset and compared with other methods without losing *** model improved accuracy by 2.18%compared to the baseline method GraphSAGE,and improved F1 score by 1.45%compared to the baseline method,verifying the effectiveness of the model.

关键词： Graph neural networks user preferences access control social network

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A guidance strategy for rendezvous and docking to the space station in the Earth-Moon NRHO orbit

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中国空间科学技术（中英文） 2024年第4期44卷 29-39页

作者： XIE Yongchun CHEN Changqing LI Xiangyu LI zhenyu Beijing Institute of Control Engineering Beijing 100094China School of Aerospace Engineering Beijing Institute of TechnologyBeijing 100081China

with the development of space technology,it is possible to build a space station in Earth-Moon space as a transit for Earth-Moon round-trip and entering in the deep *** and docking is one of the key technologies for building an Earth-Moon space station.A guidance strategy for rendezvous and docking from the Earth orbit to the space station in the Earth-Moon NRHO orbit is proposed in this paper,which is suitable for engineering ***,the rendezvous and docking process is divided into three sections,i.e.,the large-range orbit transfer section,far-range guidance section,and close-range approaching *** suitable terminal of large-range orbit transfer is selected according to the eigenvalue of NRHO orbit state transition *** two-impulse guidance method based on the relative motion equation in the three-body problem is adopted for the far-range guidance *** impulse time and amplitude are solved with the optimization *** linear constant three-body relative motion equation is proposed for the close-range approaching section,and the rendezvous and docking is completed by a two-stage linear ***,a simulation analysis is carried out,and the simulation results show that the adopted dynamics equations and the designed guidance law are effective,and the three flight phases are naturally connected to accomplish the rendezvous and docking mission from the Earth orbit to the space station on the Earth-Moon NRHO.

关键词： Earth-Moon space station rendezvous and docking NRHO orbit relative motion guidance strategy

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Ethical concerns in aging research: perspectives of global frontline researchers

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Science China Life Sciences 2024年第10期67卷 2149-2156页

作者： Yaojin Peng Lulu Ding zhenyu Xiao Moshi Song Jianwei Lv Guang-Hui Liu Key Laboratory of Organ Regeneration and Reconstruction State Key Laboratory of Stem Cell and Reproductive BiologyInstitute of ZoologyChinese Academy of Sciences University of Chinese Academy of Sciences Beijing Institute for Stem Cell and Regenerative Medicine Institute for Stem Cell and Regeneration Chinese Academy of Sciences Aging Biomarker Consortium (ABC) School of Life Science Beijing Institute of Technology School of Life Sciences Xiamen University Advanced Innovation Center for Human Brain Protection and National Clinical Research Center for Geriatric Disorders Xuanwu HospitalCapital Medical University Aging Translational Medicine Center International Center for Aging and CancerBeijing Municipal Geriatric Medical Research CenterXuanwu HospitalCapital Medical University

This study investigated the ethical landscape of aging research amid the increasing global focus on extending the human lifespan and health span. Our global survey of 180 researchers across 38 jurisdictions revealed divergent perceptions of aging, a consensus regarding the feasibility of delaying aging, and multiple perspectives regarding lifespan extension. The present findings underscore a paradigm shift toward inclusive and ethically sound research, emphasizing the need for an approach that strikes a balance between basic and clinical research. In addition, this study highlighted key ethical concerns in aging research, including the effects of misleading advertising, potential inequality in access to aging interventions, and risks pertaining to the extrapolation of research findings from lower-model organisms to humans. The insights presented in this paper call for an integrated approach for overcoming the complex ethical and societal challenges in aging research to ensure responsible and equitable advancements in this burgeoning field.

关键词： aging ethical landscape ethics surveys and questionnaires

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Sustainable all-weather CO2 utilization by mimicking natural photosynthesis in a single material

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National Science Review 2024年第2期11卷 177-187页

作者： Xianjin Shi Yu Huang Ran Long zhenyu wang Liqin wang Junji Cao Gangqiang Zhu Yujie Xiong State Key Laboratory of Loess and Quaternary Geology(SKLLQG) Key Laboratory of Aerosol Chemistry and Physics Institute of Earth EnvironmentChinese Academy of Sciences Center of Excellence in Quaternary Science and Global Change Chinese Academy of Sciences University of Chinese Academy of Sciences Hefei National Research Center for Physical Sciences at the Microscale School of Chemistry and Materials Science and National Synchrotron Radiation Laboratory University of Science and Technology of China Institute of Atmospheric Physics Chinese Academy of Sciences School of Physics and Information Technology Shaanxi Normal University

Solar-driven CO2conversion into hydrocarbon fuels is a sustainable approach to synchronously alleviating the energy crisis and achieving net ***,the dependence of the conversion process on solar illumination hinders its practical application due to the intermittent availability of sunlight at night and on cloudy or rainy ***,we report a model material of Pt-loaded hexagonal tungsten trioxide（Pt/h-wO3） for decoupling light and dark reaction processes,demonstrating the sustainable CO2conversion under dark conditions for the first *** such a material system,hydrogen atoms can be produced by photocatalytic water splitting under solar illumination,stored together with electrons in the h-wO3through the transition of w6+to w5+and spontaneously released to trigger catalytic CO2reduction under dark ***,we demonstrate using natural light that CH4production can persist at night and on rainy days,proving the accomplishment of all-weather CO2conversion via a sustainable way.

关键词： sustainable CO2 utilization artificial photosynthesis all-weather application charge storage

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Dendritic Deep Learning for Medical Segmentation

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IEEE/CAA Journal of Automatica Sinica 2024年第3期11卷 803-805页

作者： Zhipeng Liu Zhiming Zhang zhenyu Lei Masaaki Omura Rong-Long wang Shangce Gao the Faculty of Engineering University of ToyamaToyama-shi 930-8555Japan the Faculty of Engineering University of FukuiFukui-shi 910-8507Japan IEEE

Dear Editor,This letter presents a novel segmentation approach that leverages dendritic neurons to tackle the challenges of medical imaging *** this study,we enhance the segmentation accuracy based on a SegNet variant including an encoder-decoder structure,an upsampling index,and a deep supervision ***,we introduce a dendritic neuron-based convolutional block to enable nonlinear feature mapping,thereby further improving the effectiveness of our approach.

关键词： thereby Deep enable

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Hierarchical FeO_(χ)H_(y)@Ni_(3)B hybrid for efficient alkaline oxygen evolution at high current density

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Journal of Energy Chemistry 2024年第7期94卷 599-607页

作者： Fuxi Liu Qing Liang zhenyu Li Meiqi Liu Nailin Yue Zizhun wang Xu Zou wei Zhang Key Laboratory of Automobile Materials Ministry of Education School of Materials Science&EngineeringElectron Microscopy CenterInternational Center of Future ScienceJilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy MaterialsJilin UniversityChangchun 130012JilinChina

Electrocatalysts with high activity and long-term durability are vital toward large-scale hydrogen pro-duction from electrocatalytic water ***,the self-supported electrode(FeO_(χ)H_(y)@Ni_(3)B/NF)with hierarchical heterostructure was simply prepared by using Ni_(3)B chunks grown on nickel foam as sub-strate to in situ form vertical FeO_(χ)H_(y)*** hybrid shows efficient oxygen evolution reaction activity with overpotentials as low as 267 and 249 mV at 100 mA cm^(-2)in 1 M KOH solution and 30 wt%KOH solution,***,it also exhibits excellent catalytic stability,sustaining catalysis at 500 mA cm^(-2)in 1 M KOH solution for 200 h,and even for 200 h at 1000 mA cm^(-2)in 30 wt%KOH *** experimental results reveal that the FeO_(χ)H_(y)@Ni_(3)B/NF is endowed with superhydrophilic and superaerophobic surface properties,which not only provide more mass transport channels,as well as facilitated the diffusion of reaction intermediates and gas ***,it holds faster reaction kinetics,more accessible active sites and accelerated electron transfer rates due to strong synergistic interactions attheheterogeneous interface.

关键词： FeO_(χ)H_(y)@Ni_(3)B/NF hybrid Heterostructure Oxygen evolution reaction Electrocatalytic

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Piezotronic neuromorphic devices:principle,manufacture,and applications

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International Journal of Extreme Manufacturing 2024年第3期6卷 363-385页

作者： Xiangde Lin zhenyu Feng Yao Xiong wenwen Sun wanchen Yao Yichen wei Zhong Lin wang Qijun Sun Department of Research Shanghai University of Medicine and Health Sciences Affiliated Zhoupu HospitalShanghai 201318People’s Republic of China Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of SciencesBeijing 101400People’s Republic of China Center on Nanoenergy Research School of Chemistry and Chemical EngineeringGuangxi UniversityNanning 530004People’s Republic of China Shandong Zhongke Naneng Energy Technology Co. LtdDongying 257061People’s Republic of China Georgia Institute of Technology AtlantaGA 30332-0245United States of America

with the arrival of the era of artificial intelligence(AI)and big data,the explosive growth of data has raised higher demands on computer hardware and *** techniques inspired by biological nervous systems are expected to be one of the approaches to breaking the von Neumann *** neuromorphic devices modulate electrical transport characteristics by piezopotential and directly associate external mechanical motion with electrical output signals in an active manner,with the capability to sense/store/process information of external *** this review,we have presented the piezotronic neuromorphic devices(which are classified into strain-gated piezotronic transistors and piezoelectric nanogenerator-gated field effect transistors based on device structure)and discussed their operating mechanisms and related manufacture ***,we summarized the research progress of piezotronic neuromorphic devices in recent years and provided a detailed discussion on multifunctional applications,including bionic sensing,information storage,logic computing,and electrical/optical artificial ***,in the context of future development,challenges,and perspectives,we have discussed how to modulate novel neuromorphic devices with piezotronic effects more *** is believed that the piezotronic neuromorphic devices have great potential for the next generation of interactive sensation/memory/computation to facilitate the development of the Internet of Things,AI,biomedical engineering,etc.

关键词： piezotronics neuromorphic devices strain-gated transistors piezoelectric nanogenerators synaptic transistors

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