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Partition and planning:A human-like motion decision for UAV in trap environment

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Science China(Technological Sciences) 2024年第4期67卷 1226-1237页

作者： CHEN JinTao ZHOU Qi REN HongRu li hongyi School of Automation Guangdong University of TechnologyGuangzhou 510006China Provincial Key Laboratory of Intelligent Decision and Cooperative Control Guangdong University of Technology Guangzhou 510006Chi

This paper presents a human-like motion decision-making method for unmanned aerial vehicles(UAVs)navigating in trap *** proposed a space partitioning method based on sampling and consistency control to conduct a preliminary analysis of the indoor environment based on architectural *** method reduces the dimensionality of the path planning problem,thereby enhancing the ***,we designed a target-switching logic for the dynamic window *** improvement endows the UAV with the capability of both real-time obstacle avoidance and global navigation,enhancing the efficiency of the UAV in flying to task spots ***,by applying human-like methods of batch distance perception and obstacle perception to this scheme,we have further enhanced the robustness and efficiency of path ***,considering the scenario of high-rise fire rescue,we conducted simulation *** demonstrates that our scheme enhances the efficiency and robustness of path planning.

关键词： path planning indoor environment spacial partition high-rise fire rescue

Au nanoclusters anchored on TiO_(2) nanosheets for high-efficiency electroreduction of nitrate to ammonia

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Nano Research 2024年第3期17卷 1209-1216页

作者： Miaosen Yang Tianran Wei Jia He Qian liu ligang Feng hongyi li Jun Luo Xijun liu School of Chemical Engineering Northeast Electric Power UniversityJilin 132012China Nanchang Institute of Technology Nanchang 330044China State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources College of ChemistryXinjiang UniversityUrumqi 830017China State Key Laboratory of Featured Metal Materials and life-cycle Safety for Composite Structures Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured MaterialsSchool of ResourcesEnvironment and MaterialsGuangxi UniversityNanning 530004China Institute for New Energy Materials and Low-Carbon Technologies School of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China Institute for Advanced Study Chengdu UniversityChengdu 610106China School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002China Guangzhou Panyu Polytechnic Guangzhou 511483China ShenSi Lab Shenzhen Institute for Advanced StudyUniversity of Electronic Science and Technology of ChinaLonghua DistrictShenzhen 518110China

Electrocatalytic nitrate reduction reaction(NO_(3)RR)offers a unique rationale for green NH_(3) synthesis,yet the lack of high-efficiency NO_(3)RR catalysts remains a great *** this work,we show that Au nanoclusters anchored on TiO_(2) nanosheets can efficiently catalyze the conversion of NO_(3)RR-to-NH_(3) under ambient conditions,achieving a maximal Faradic efficiency of 91%,a peak yield rate of 1923μg·h^(-1)·mgcat.-1,and high durability over 10 consecutive cycles,all of which are comparable to the recently reported metrics(including transition metal and noble metal-based catalysts)and exceed those of pristine TiO_(2).Moreover,a galvanic Zn-nitrate battery using the catalyst as the cathode was proposed,which shows a power density of 3.62 mW·cm^(-2) and a yield rate of 452μg·h^(-1)·mgcat.-*** simulations further indicate that the atomically dispersed Au clusters can promote the adsorption and activation of NO_(3)-species,and reduce the NO_(3)RR-to-NH_(3) barrier,thus leading to an accelerated cathodic *** work highlights the importance of metal clusters for the NH_(3) electrosynthesis and nitrate removal.

关键词： NH3 electrosynthesis Zn-nitrate battery Au nanoclusters nitrate reduction reaction(NRR) TiO_(2)nanosheets

Asymmetric frequency multiplexing topological devices based on a floating edge band

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Photonics Research 2024年第6期12卷 1201-1212页

作者： JIAJUN MA CHUNMEI OUYANG YUTING YANG DONGYANG WANG hongyi li li NIU YI liU QUAN XU YANFENG li ZHEN TIAN JIAGUANG HAN WEIli ZHANG Center for Terahertz Waves and College of Precision Instrument and Optoelectronics Engineering and Key Laboratory of Optoelectronics Information and TechnologyTianjin UniversityTianjin 300072China School of Materials Science and Physics China University of Mining and TechnologyXuzhou 221116China Optoelectronics Research Centre University of SouthamptonSouthampton SO171BJUK Guangxi Key Laboratory of Optoelectronic Information Processing School of Optoelectronic EngineeringGuilin University of Electronic TechnologyGuilin 541004China School of Electrical and Computer Engineering Oklahoma State UniversityStillwaterOklahoma 74078USA

Topological photonics provides a platform for robust energy transport regardless of sharp corners and ***,the frequency multiplexing topological devices have attracted much attention due to the ability to separate optical signals by wavelength and hence the potential application in optical communication *** frequency multiplexing topological devices are generally based on the slow light ***,the resulting static local spatial mode or finely tuned flat band has zero-group velocity,making it difficult for both experimental excitation and channel ***,we propose and experimentally demonstrate an alternative prototype of asymmetric frequency multiplexing devices including a topological rainbow and frequency router based on floating topological edge mode(instead of localized ones);hence the multiple wavelength channels can be collectively excited with a point source and efficiently routed to separate output *** channel separation in our design is achieved by gradually tuning the band gap truncation on a topological edge band over a wide range of frequencies.A crucial feature lies in that the topological edge band is detached from bulk states and floating within the upper and lower photonic band *** interestingly,due to the sandwiched morphology of the edge band,the top and bottom band gaps will each truncate into transport channels that support topological propagation towards opposite directions,and the asymmetrical transportation is realized for the frequency multiplexing topological devices.

关键词： tuning floating hence

Vision-Based Adaptive Prescribed-Time Control of UAV for Uncooperative Target Tracking with Performance Constraint

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Journal of Systems Science & Complexity 2024年第5期37卷 1956-1977页

作者： SHE Xuehua MA Hui REN Hongru li hongyi School of Automation and the Guangdong Provincial Key Laboratory of Intelligent Decision and Cooperative Control Guangdong University of Technology School of Mathematics and Statistics Guangdong University of Technology College of Electronic and Information Engineering and Chongqing Key Laboratory of Generic Technology and System of Service Robots Southwest University

This paper discusses the uncooperative target tracking control problem for the unmanned aerial vehicle(UAV) under the performance constraint and scaled relative velocity constraint, in which the states of the uncooperative target can only be estimated through a vision sensor. Considering the limited detection range, a prescribed performance function is designed to ensure the transient and steady-state performances of the tracking system. Meanwhile, the scaled relative velocity constraint in the dynamic phase is taken into account, and a time-varying nonlinear transformation is used to solve the constraint problem, which not only overcomes the feasibility condition but also fails to violate the constraint boundaries. Finally, the practically prescribed-time stability technique is incorporated into the controller design procedure to guarantee that all signals within the closed-loop system are *** is proved that the UAV can follow the uncooperative target at the desired relative position within a prescribed time, thereby improving the applicability of the vision-based tracking approach. Simulation results have been presented to prove the validity of the proposed control strategy.

关键词： Nonlinear transformation performance constraint prescribed-time tracking uncooperative target vision-based measurement

Recent Advances in Bronchopulmonary Dysplasia Protection and Therapy

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Health 2024年第5期16卷 470-489页

作者： Pingfan Xia hongyi li Zhe Xu Yongping Lu Guangyuan Central Hospital Affiliated to North Sichuan Medical College Guangyuan China

For preterm infants, bronchopulmonary dysplasia (BPD) is usually caused by abnormal lung development due to various factors during prenatal and postnatal process. One of the reasons for death and bad prognosis of preterm infants is to have BPD. Up to now, there are no unified strategies or drugs to treat BPD. In clinical, many intervention treatments have been applied to achieve BPD therapy, mainly including preterm protection, protective ventilation strategies, and delivery of corticosteroids, pulmonary vasodilators, and antioxidants. This review summarizes the current advances in BPD protection and treatment, and notes that gut microbiota and mesenchymal stem cells (MSCs) can be the promising strategy for protecting and treating BPD in the future.

关键词： Bronchopulmonary Dysplasia Preterm Infants Protection and Therapy Mesenchymal Stem Cells Gut Microbiota

Deep Underground Earthquake Observation: Small to Moderate Earthquakes and Microearthquakes Identification

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Journal of Earth Science 2024年

作者： Chang Chen Wentao Wan Yun Wang Jinsong liu hongyi li Qiangqiang Miao Yongsheng He Juan Qi Chao Wang Institute of Geochemistry Chinese Academy of Sciences MWMC Research Group School of Geophysics and Information Technology China University of Geosciences College of Electrical and Information Engineering Anhui University of Science and Technology Institute of Engineering Protection Engineering Research Institute of Academy of Military Sciences State Kay Laboratory of Geological Processes and Mineral Resources China University of Geosciences Beijing China

0 Introduction Small to moderate earthquakes and microearthquakes occur widely and numerously (Luo，

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海岸植被防护机制的物理模型试验研究进展

同济大学学报（自然科学版） 2024年第3期52卷 378-387页

作者：匡翠萍丛新范家栋李宏义同济大学土木工程学院上海200092

基于自然的海岸修复与防护越来越受到人们关注,从海岸植被对水动力及泥沙运动影响机制的物理模型试验研究方面,介绍了试验研究中植被的描述方法,包括植被的分类、材料选择、特性表征等;综述了植被影响下的流场结构、消浪特征、形态阻力... 详细信息

基于自然的海岸修复与防护越来越受到人们关注,从海岸植被对水动力及泥沙运动影响机制的物理模型试验研究方面,介绍了试验研究中植被的描述方法,包括植被的分类、材料选择、特性表征等;综述了植被影响下的流场结构、消浪特征、形态阻力相关的研究进展;论述了悬沙浓度分布、泥沙再悬浮、沉积和冲刷模式等泥沙输运方面的研究成果;结合大量模型试验研究,提出了未来的研究趋势。

关键词：海岸植被海岸防护物理模型试验波流动力泥沙输运

li_(1.2)Mn_(0.54)Ni_(0.13)Co_(0.13)O_(2)正极材料的Ga_(2)O_(3)包覆改性及电化学性能

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无机化学学报 2024年第6期40卷 1105-1113页

作者：刘新朋赵刘洋李泓漪陈雅图吴爱民李爱魁黄昊大连理工大学材料科学与工程学院辽宁省能源材料及器件重点实验室大连116024 陕西煤业化工技术研究院有限责任公司西安710065 大连理工大学电气工程学院大连116024

首先采用共沉淀方法制备富锂锰基正极材料li_(1.2)Mn_(0.54)Ni_(0.13)Co_(0.13)O_(2)原始样品(P-LRMO),然后通过简单的湿化学法以及低温煅烧方法对其进行不同含量Ga_(2)O_(3)原位包覆。透射电子显微镜(TEM)以及X射线光电子能谱(XPS)结... 详细信息

首先采用共沉淀方法制备富锂锰基正极材料li_(1.2)Mn_(0.54)Ni_(0.13)Co_(0.13)O_(2)原始样品(P-LRMO),然后通过简单的湿化学法以及低温煅烧方法对其进行不同含量Ga_(2)O_(3)原位包覆。透射电子显微镜(TEM)以及X射线光电子能谱(XPS)结果表明在P-LRMO表面成功合成了Ga_(2)O_(3)包覆层。电化学测试结果表明:含有3%Ga_(2)O_(3)的改性材料G3-LRMO具有最优的电化学性能,其在0.1C倍率(电流密度为25 mA·g^(-1))下首圈充放电比容量可以达到270.1 mAh·g^(-1),在5C倍率下容量仍能保持127.4 mAh·g^(-1),优于未改性材料的90.7 mAh·g^(-1),表现出优异的倍率性能。G3-LRMO在1C倍率下循环200圈后仍有190.7 mAh·g^(-1)的容量,容量保持率由未改性前的72.9%提升至85.6%,证明Ga_(2)O_(3)包覆改性能有效提升富锂锰基材料的循环稳定性。并且,G3-LRMO在1C倍率下循环100圈后,电荷转移阻抗(Rct)为107.7Ω,远低于未改性材料的251.5Ω,表明Ga_(2)O_(3)包覆层能提高材料的电子传输速率。

关键词：锂离子电池富锂锰基正极材料 Ga_(2)O_(3)包覆电化学性能

Y(PO_(3))_(3)双包覆改性对li[Ni_(0.8)Co_(0.15)Al_(0.05)]O_(2)电化学性能的影响

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无机化学学报 2024年第7期40卷 1320-1328页

作者：李泓漪吴爱民赵刘洋刘新朋陈凤琴李爱魁黄昊大连理工大学材料科学与工程学院辽宁省能源材料及器件重点实验室大连116024 陕西煤业化工技术研究院有限责任公司西安710065 大连理工大学电气工程学院大连116024

在镍钴铝酸锂正极材料li[Ni_(0.8)Co_(0.15)Al_(0.05)]O_(2)(NCA)制备过程中表面遗留的碱性物质会严重影响其循环稳定性能,针对这一难题,提出使用Y(PO_(3))_(3)对其进行表面包覆改性,利用Y(PO_(3))_(3)与表面残留的liOH反应消除表面残碱... 详细信息

在镍钴铝酸锂正极材料li[Ni_(0.8)Co_(0.15)Al_(0.05)]O_(2)(NCA)制备过程中表面遗留的碱性物质会严重影响其循环稳定性能,针对这一难题,提出使用Y(PO_(3))_(3)对其进行表面包覆改性,利用Y(PO_(3))_(3)与表面残留的liOH反应消除表面残碱,并探讨包覆改性对NCA整体性能的影响机制。测试分析结果表明,在低温煅烧过程中前驱体表面会形成均匀致密的Y(PO_(3))_(3)和liPO_(3)包覆层,liPO_(3)有较高的离子电导率,双包覆层能够防止活性物质在电化学循环过程中与电解液相互接触时发生有害副反应,提高电极材料的循环稳定性。其中Y(PO_(3))_(3)包覆量(质量分数)为1%的样品在0.1C下的首次库仑效率从未改性样品的78.65%提高到88.50%,在1C下循环150圈后容量保持率从59.38%提高到85.33%,相比于未改性样品具有更高的首次库仑效率和更优异的循环性能。

关键词：电化学高镍正极材料磷酸盐表面涂层循环稳定