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Targets capture by distributed active swarms via bio-inspired reinforcement learning

Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 210-221页

作者： Kun Xu Yue Li Jun sun Shuyuan Du Xinpeng Di Yuguang Yang Bo Li Institute of Biomechanics and Medical Engineering Applied Mechanics Laboratory Department of Engineering MechanicsTsinghua University Institute of Nuclear and New Energy Technology Tsinghua University Shanghai Aerospace Control Technology Institute Shanghai Key Laboratory of Aerospace Intelligent Control Technology College of Automation Engineering Nanjing University of Aeronautics and Astronautics

Natural swarms arranged from cells to herds are usually decentralized but display intriguing collective intelligence in coordinating individuals across large scales to efficiently achieve their common goals. Learning from nature may provide new strategies for controlling collective dynamics of synthetic swarms to accomplish specific functions. Here, we present a bioinspired computational framework that steers distributed active swarms to collectively capture and merge targets via reinforcement learning. We exploit collective milling structures of natural herds to cage the targets, and adopt a switching control policy inspired by sperms' chiral dynamics to optimize the trajectories of individuals, through which the active swarms can selforganize to enclose single or multiple distant targets in a dynamical, adaptive and scalable manner. There exists a critical swarm size, beyond which the excessive competition between agents would generate large mechanical forces, leading to capture instability but enabling the transition from short-distance to long-distance merging capture of multiple targets. This work provides physical insights into distributed active swarms and could offer a multilevel, decentralized strategy toward controlling swarm robotics in wide applications such as bio-medical devices, machine immunity, and target clearance.

关键词： swarm intelligence robotics multi-tasks artificial intelligence bionics

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On construction of strong orthogonal arrays and column-orthogonal strong orthogonal arrays of strength two plus

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Science China Mathematics 2025年

作者： Bochuan Jiang Yaping Wang Fasheng sun School of Mathematics and Statistics Beijing Jiaotong University Key Laboratory of Advanced Theory and Application in Statistics and Data Science Ministry of EducationSchool of Statistics East China Normal University Key Laboratory for Applied Statistics of Ministry of Education and School of Mathematics and Statistics Northeast Normal University

Computer experiments require space-filling designs with good low-dimensional projection *** orthogonal arrays are a type of space-filling design that provides better stratifications in low dimensions than ordinary orthogonal arrays. In this paper, we address the problem of constructing strong orthogonal arrays and column-orthogonal strong orthogonal arrays of strength two plus. Existing methods typically rely on regular designs or specific nonregular designs as base orthogonal arrays, limiting the sizes of the final ***, we propose two general methods that are easy to implement and applicable to a wide range of base orthogonal arrays. These methods produce space-filling designs that can accommodate a large number of factors,provide significant flexibility in terms of run sizes, and possess appealing low-dimensional projection ***, these designs are ideal for computer experiments.

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Free-standing vanadium pentoxide nanoribbon film as a high-performance cathode for rechargeable sodium batteries

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Chinese Chemical Letters 2017年第12期28卷 2251-2253页

作者： Yi sun Xin liang Hongfa xiang Yan YU Anhui Provincial Key Laboratory of Advanced Functional Materials and Devices School of Materials Science and Engineering Hefei University of TechnologyHefei 230009 China Key Laboratory of Materials for Energy Conversion Chinese Academy of Sciences Department of Materials Science and Engineering University of Scienceand Technology of China Hefei 230026 China

Vanadium pentoxide （***2O） nanoribbons are synthesized via a hydrothermal process. These ribbons are 20nm thick, 200nm to 1 μm wide and several tens of micrometers long. Free-standing binder-free films are prepared by using these nanoribbons with multi-walled carbon nanotubes （MWCNTs） and used as the cathode for rechargeable sodium batteries. The large interlayer space between the V20s5 bilayers can enhance the kinetics of sodium ion intercalation/deintercalation. In addition, the intertwining network of the V2O5. 0.34H2O film provides efficient electron conduction pathways and shortens diffusion distances of sodium ion. The electrochemical tests prove that the free- standing V2O5. 0.34H2O film cathode delivers high reversible specific capacities （190 mAh/g） and good cycling stabilities （170 mAh/g after 150 cycles） in the voltage range between 1.5V and 3.5V.

关键词： Vanadium pentoxide Cathode Free-standing electrode Rechargeable sodium batteries

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基于6U标准板卡的一体式两轴伺服控制系统

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现代电子技术 2011年第22期34卷 206-207页

作者：曹富禄孙向亮张朋年胡卫华西安电子工程研究所陕西西安710100

针对伺服系统中独立设计的各功能模块之间需要诸多电气接线的问题,研发了一套完全自主产权的、集基于6U标准的控制板、电源转换板、角度编码板、功率驱动板于一体的两轴伺服控制系统,介绍了系统及各组成模块的功能及工作原理及系统的特... 详细信息

针对伺服系统中独立设计的各功能模块之间需要诸多电气接线的问题,研发了一套完全自主产权的、集基于6U标准的控制板、电源转换板、角度编码板、功率驱动板于一体的两轴伺服控制系统,介绍了系统及各组成模块的功能及工作原理及系统的特点。实际应用证明,该系统具有较高的通用性、可靠性、维修性、电磁兼容性。

关键词： 6U标准板卡一体式伺服控制系统电气接线

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杨小舟蛾防治药剂筛选

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防护林科技 2007年第5期20卷 42-43页

作者：王才良孙祥良张文钢曹奎荣刘丽月浙江省嘉兴市林业工作站浙江嘉兴314000 浙江省嘉兴市农业科学院

通过对1.8%阿维菌素、25%灭幼脲、100亿芽活孢.g-1B t和90%敌百虫4种药剂在室内、室外对杨小舟蛾幼虫防治试验,发现各种供试药剂均取得一定的防治效果,其中1.8%阿维菌素、25%灭幼脲、100亿芽活孢.g-1B t防效较好。

关键词：杨树杨小舟蛾药剂筛选

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Is the Paris rulebook sufficient for effective implementation of Paris Agreement?

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Advances in Climate Change Research 2022年第4期13卷 600-611页

作者： Ruo-Shui sun xiang GAO liang-Chun DENG Can WANG School of Environment Tsinghua UniversityBeijing 100084China National Center for Climate Change Strategy and International Cooperation Beijing 100035China Center for Environmental Progress Wuhan 430070China

Glasgow Climate Conference concluded the negotiation on implementing rules for Paris Agreement and adopted the Glasgow Climate *** on practices under the UNFCCC and its Kyoto Protocol,Paris Agreement enhanced global climate change *** Agreement established a system centered around‘nationally determined contributions’(NDCs)of Parties,with a transparency framework to ensure information flow running the system,meanwhile facilitating implementation by Parties through the mechanism on facilitation and compliance,as well as urging Parties to enhance ambition both at individual level and aggregate level through the mechanism on Global *** doing so,it is logical that the system would lead to the achievement of the goal set by Paris ***,the system stil faces significant deficiency,such as lack of information timeliness,intransparency of some necessary information,hypothesis-based but not solution-based decision-making,and lack of effective assurance for developing countries to get finance and technology *** is concluded that this system is beneficial to long-term climate change policy decision and tracking progress of actions,while for shor-term decision-making,more comprehensive consideration is needed than only based on the mechanisms of and outcomes from the *** society should pay more attention to the progress of implementation,as well as ambition of various support provided to developing countries,than only the ambition of mitigation target numbers.

关键词： Global climate govermnance Paris Agreement Paris rulebook Nationally determined contribution Multilateral environmental agreement

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电聚合苯胺改性碳纤维海洋电极电化学性能及其电场响应研究

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中国海洋大学学报（自然科学版） 2025年第1期55卷 118-129页

作者：田翔孙久哲付玉彬中国海洋大学材料科学与工程学院山东青岛266100

本文应用碳酸氢铵弱碱性溶液作为电解质电化学原位聚合苯胺制备聚丙烯腈基碳纤维海洋电极,研究其电化学性能与电场响应性能。结果表明,碳纤维表面生成还原态聚苯胺并出现特征氧化还原峰;交流阻抗谱表明改性电极表面等效电路增加了膜电... 详细信息

本文应用碳酸氢铵弱碱性溶液作为电解质电化学原位聚合苯胺制备聚丙烯腈基碳纤维海洋电极,研究其电化学性能与电场响应性能。结果表明,碳纤维表面生成还原态聚苯胺并出现特征氧化还原峰;交流阻抗谱表明改性电极表面等效电路增加了膜电容和膜电阻,电场响应由纯电容耦合改变为电容电阻共同作用的混合机制,有利于低频低强度信号的响应。在电场响应测试中,改性电极电位漂移量达0.66 mV/d;能够较好响应10 mV,10 mHz的低频率低强度电场信号;线性度最小值为0.072%。水流冲刷4h后聚苯胺膜质量损失为6.30%,相比于盐酸溶液电聚合制得的聚苯胺膜(质量损失7.55%)具有更好的结合力。该海洋电极可望成为新一代低成本、高性能电场传感器。

关键词：碳纤维电极聚苯胺碳酸氢铵电化学性能海洋电场响应

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杨树溃疡病药剂防治研究

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防护林科技 2007年第5期20卷 44-44,93页

作者：孙祥良张文钢曹奎荣王才良严晓素浙江省嘉兴市农业科学院浙江嘉兴314000 嘉兴市林业工作站浙江省林业有害生物防治检疫局

通过6种药剂对杨树溃疡病病原菌室内抑菌测定,筛选出福美砷、甲基托布津、多菌灵和退菌特4种药剂,抑菌效果明显。用上述4种药剂进行树干病斑涂药防治试验,结果表明,除退菌特防效较差外,其余3种药剂均有较好的防治效果。

关键词：杨树溃疡病防治

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Influence of introducing Zr,Ti,Nb and Ce elements on externally solidified crystals and mechanical properties of high-pressure die-casting Al–Si alloy

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 147-153页

作者： Junjie Li Wenbo Yu Zhenyu sun Weichen Zheng liangwei Zhang Yanling Xue Wenning Liu Shoumei Xiong Center of Materials Science and Engineering School of Mechanical and Electronic Control EngineeringBeijing Jiaotong UniversityBeijing 100044China Traffic&Transportation Engineering Central South UniversityChangsha 410075China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China School of Materials Science and Engineering Tsinghua UniversityBeijing 100084China

High pressure die casting(HPDC)AlSi10Mn Mg alloy castings are widely used in the automobile *** can optimize the mechanical properties of castings through heat treatment,while the release of thermal stress arouses the deformation of large integrated ***,the development of non-heat treatment Al alloys is becoming the hot *** addition,HPDC contains externally solidified crystals(ESCs),which are detrimental to the mechanical properties of *** achieve high strength and toughness of non-heat treatment die-casting Al-Si alloy,we used AlSi9Mn alloy as matrix with the introduction of Zr,Ti,Nb,and *** influences on ESCs and mechanical properties were systematically investigated through three-dimensional reconstruction and thermodynamic *** results reveal that the addition of Ti increased ESCs'size and porosity,while the introduction of Nb refined ESCs and decreased ***,large-sized Al_3(Zr,Ti)phases formed and degraded the mechanical *** introduction of Ce resulted in the poisoning effect and reduced mechanical properties.

关键词： aluminium alloy high-pressure die-casting externally solidified crystals non-heat treatment

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Constructing Donor–Acceptor‑Linked COFs Electrolytes to Regulate Electron Density and Accelerate the Li^(+)Migration in Quasi‑Solid‑State Battery

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Nano-Micro Letters 2025年第1期17卷 456-471页

作者： Genfu Zhao Hang Ma Conghui Zhang Yongxin Yang Shuyuan Yu Haiye Zhu Yongjiang sun Hong Guo School of Materials and Energy International Joint Research Center for Advanced Energy Materials of Yunnan ProvinceYunnan UniversityKunming 650091People’s Republic of China Yunnan Yuntianhua Co. LtdR&D CenterKunming 650228People’s Republic of China Southwest United Graduate School Kunming 650091People’s Republic of China

Regulation the electronic density of solid-state electrolyte by donor–acceptor(D–A)system can achieve highly-selective Li^(+)transportation and conduction in solid-state Li metal *** study reports a high-performance solid-state electrolyte thorough D–A-linked covalent organic frameworks(COFs)based on intramolecular charge transfer *** other reported COFbased solid-state electrolyte,the developed concept with D–A-linked COFs not only achieves electronic modulation to promote highly-selective Li^(+)migration and inhibit Li dendrite,but also offers a crucial opportunity to understand the role of electronic density in solid-state Li metal *** introduced strong electronegativity F-based ligand in COF electrolyte results in highlyselective Li^(+)(transference number 0.83),high ionic conductivity(6.7×10^(-4)S cm^(−1)),excellent cyclic ability(1000 h)in Li metal symmetric cell and high-capacity retention in Li/LiFePO_(4)cell(90.8%for 300 cycles at 5C)than substituted C-and N-based *** is ascribed to outstanding D–A interaction between donor porphyrin and acceptor F atoms,which effectively expedites electron transferring from porphyrin to F-based ligand and enhances Li^(+)***,we anticipate that this work creates insight into the strategy for accelerating Li^(+)conduction in high-performance solid-state Li metal batteries through D–A system.

关键词： Electronic modulation engineering Donor-acceptor-linked covalent organic frameworks Quasi-solid-state Li metal battery

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