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A Chaotic Local Search-Based Particle Swarm Optimizer for Large-Scale Complex Wind Farm Layout Optimization

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IEEE/CAA Journal of Automatica Sinica 2023年第5期10卷 1168-1180页

作者： Zhenyu Lei Shangce Gao Zhiming Zhang Haichuan Yang haotian li The authors are with the Faculty of Engineering University of ToyamaToyama 930-8555Japan

Wind energy has been widely applied in power generation to alleviate climate problems.The wind turbine layout of a wind farm is a primary factor of impacting power conversion efficiency due to the wake effect that reduces the power outputs of wind turbines located in downstream.Wind farm layout optimization(WFLO)aims to reduce the wake effect for maximizing the power outputs of the wind farm.Nevertheless,the wake effect among wind turbines increases significantly as the number of wind turbines increases in the wind farm,which severely affect power conversion efficiency.Conventional heuristic algorithms suffer from issues of low solution quality and local optimum for large-scale WFLO under complex wind scenarios.Thus,a chaotic local search-based genetic learning particle swarm optimizer(CGPSO)is proposed to optimize large-scale WFLO problems.CGPSO is tested on four larger-scale wind farms under four complex wind scenarios and compares with eight state-of-the-art algorithms.The experiment results indicate that CGPSO significantly outperforms its competitors in terms of performance,stability,and robustness.To be specific,a success and failure memories-based selection is proposed to choose a chaotic map for chaotic search local.It improves the solution quality.The parameter and search pattern of chaotic local search are also analyzed for WFLO problems.

关键词： Chaotic local search(CLS) evolutionary computation genetic learning particle swarm optimization(PSO) wake effect wind farm layout optimization(WFLO)

Stochastic spin-orbit-torque device as the STDP synapse for spiking neural networks

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Science China(Physics,Mechanics & Astronomy) 2023年第5期66卷 188-194页

作者： haotian li liyuan li Kaiyuan Zhou Chunjie Yan Zhenyu Gao Zishuang li Ronghua liu National Laboratory of Solid State Microstructures Jiangsu Provincial Key Laboratory for NanotechnologySchool of PhysicsNanjing UniversityNanjing 210093China

Neuromorphic hardware,as a non-Von Neumann architecture,has better energy efficiency and parallelism than the conventional computer.Here,with the numerical modeling spin-orbit torque(SOT)device using current-induced SOT and Joule heating effects,we acquire its magnetization stochastic switching probability as a function of the interval time of input current pulses and use it to mimic the spike-timing-dependent plasticity learning behavior like actual brain working.We further demonstrate that the artificial spiking neural network(SNN)built by this SOT device can perform unsupervised handwritten digit recognition with an accuracy of 80%and logic operation learning.Our work provides a new clue to achieving SNN-based neuromorphic hardware using high-energy efficiency and nonvolatile spintronics nanodevices.

关键词： spin-orbit torque neuromorphic hardware spiking neural network stochastic magnetization reversal

Temperature-and field angular-dependent helical spin period characterized by magnetic dynamics in a chiral helimagnet MnNb_(3)S_(6)

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Science China(Physics,Mechanics & Astronomy) 2023年第1期66卷 171-177页

作者： liyuan li haotian li Kaiyuan Zhou Yaoyu Gu Qingwei Fu lina Chen Lei Zhang Ronghua liu National Laboratory of Solid State Microstructures School of Physics and Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China New Energy Technology Engineering Laboratory of Jiangsu Province&School of Science Nanjing University of Posts and TelecommunicationsNanjing 210023China Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions High Magnetic Field LaboratoryHefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China

The chiral magnets with topological spin textures provide a rare platform to explore topology and magnetism for potential application implementation.Here,we study the magnetic dynamics of several spin configurations on the monoaxial chiral magnetic crystal MnNb_(3)S_(6)via broadband ferromagnetic resonance(FMR)technique at cryogenic temperature.In the high-field forced ferromagnetic state(FFM)regime,the obtained frequency f vs.resonance field H_(res) dispersion curve follows the wellknown Kittel formula for a single FFM,while in the low-field chiral magnetic soliton lattice(CSL)regime,the dependence of H_(res) on magnetic field angle can be well-described by our modified Kittel formula including the mixture of a helical spin segment and the FFM phase.Furthermore,compared with the sophisticated Lorentz micrograph technique,the observed magnetic dynamics corresponding to different spin configurations allow us to obtain temperature-and field-dependent proportion of helical spin texture and helical spin period ratio L(H)/L(0)via our modified Kittel formula.Our results demonstrated that fieldand temperature-dependent nontrivial magnetic structures and corresponding distinct spin dynamics in chiral magnets can be an alternative and efficient approach to uncovering and controlling nontrivial topological magnetic dynamics.

关键词： chiral helimagnets magnetic solitons ferromagnetic resonance phase diagram

SF_(6) decomposition behaviour under partial discharge of typical insulation defects in gas-solid insulated valve-side bushing of converter transformer

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High Voltage 2023年第4期8卷 690-697页

作者： Hongtu Cheng Fuping Zeng Bowen Tang haotian li Ju Tang Zujian Huang Xianzong Chao School of Electrical Engineering and Automation Wuhan UniversityWuhanChina Hubei Key Laboratory of Power Equipment&System Security for Integrated Energy Resources WuhanChina School of Electrical and Electronic Engineering Hubei University of TechnologyWuhanChina

In this paper we investigated SF_(6) decomposition behaviour of typical insulation defects in gas-solid insulated converter transformer valve-side bushing under partial discharge(PD).Additionally,we compared the results with that of gas insulated switchgear(GIS).The results indicated that SF_(6) decomposition behaviour varies with the insulation defects type.For metal protrusion defects,the proportion ranking of CO_(2) and SO_(2) can be related to whether the needle tip is wrapped with epoxy resin-impregnated paper(ERIP).The proportion of carbon-containing products is much higher under contamination defect than under other defects.Moreover,the proportion of carbon-containing components is higher under flashover condition than under PD condition and is accompanied by the appearance of H2S and CS_(2).However,the yield of SO_(2)F_(2) is always low.Compared to negative DC voltages,positive DC voltages have a higher proportion of carboncontaining components,mainly in the form of more CO_(2) and less SOF_(2).Compared to the PD decomposition behaviour of typical insulation defects in GIS,when PD involves ERIP,the proportion of carbon-containing products,especially CO_(2),is significant higher,while the proportion of sulphur containing products,especially SO_(2)F_(2),is lower.

关键词： behaviour insulation solid

无障碍视角下残障人体育参与权保护研究——以空间正义理论为基础

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残疾人研究 2024年第2期 64-73页

作者：黎浩田武汉大学法学院武汉大学人权研究院武汉430072

残障人体育参与权的充分实现,关键在于确保体育空间的无障碍化。在无障碍视角下,以整体主义的系统性制度观塑造多维的空间正义,是健全残障人体育参与权保护体系的重要路径。具体而言,纠正体育空间障碍造成的不正义现象,需要深化检察公... 详细信息

残障人体育参与权的充分实现,关键在于确保体育空间的无障碍化。在无障碍视角下,以整体主义的系统性制度观塑造多维的空间正义,是健全残障人体育参与权保护体系的重要路径。具体而言,纠正体育空间障碍造成的不正义现象,需要深化检察公益诉讼工作,并适时为社会组织参与公益诉讼创造制度条件;在信息无障碍方面,需要明确科技企业在道德、法律和合约方面的主体责任,推动体育信息服务和数字体育资源的公平分配;在无障碍社会服务方面,通过无障碍法律规范和体育赛事规则、技术标准和行业服务指南等社会规范的协同,有机整合不同的制度资源促进体育空间无障碍社会服务体系的良性发展。

关键词：空间正义残障人体育参与权无障碍环境

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论布罗茨基学的形成与发展

俄罗斯文艺 2024年第1期 93-107页

作者：李昊天西南大学

布罗茨基研究至今已有近六十年的历史,作为一门独立学科的“布罗茨基学”的建立也已超过二十年。该学科以语言学和文学为基础,融合了修辞学、哲学、历史学、传媒学、心理学等学科的理论和方法,推出了大量的、跨学科的成果,但也存在自身... 详细信息

布罗茨基研究至今已有近六十年的历史,作为一门独立学科的“布罗茨基学”的建立也已超过二十年。该学科以语言学和文学为基础,融合了修辞学、哲学、历史学、传媒学、心理学等学科的理论和方法,推出了大量的、跨学科的成果,但也存在自身的缺陷和不足。梳理布罗茨基学形成的脉络、归纳学科发展现状和趋势,指出这门学科存在的问题并提出解决方案,并对其未来进行展望,无疑有利于该学科的研究的进一步深入。

关键词：布罗茨基学英语文学俄国文学诗歌散文

NGS-metabarcoding revealing novel foraminiferal diversity in the Western Pacific Magellan Seamount sediments

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Journal of Oceanology and limnology 2021年第5期39卷 1718-1729页

作者： Junfeng SHI Yanli LEI haotian li Tiegang li Laboratory of Marine Organism Taxonomy and Phylogeny Institute of OceanologyChinese Academy of SciencesQingdao 266071China Key Laboratory of Marine Sedimentology and Environmental Geology First Institute of OceanographyMinistry of Natural Resources(MNR)Qingdao 266061China Clinical Research Center Affi liated Hospital of Weifang Medical UniversityWeifang 261031China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519082China Laboratory for Marine Biology and Biotechnology Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China University of Chinese Academy of Sciences Beijing 100049China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China

Seamount is a unique deep-sea ecosystem widely distributed in the world.Its biodiversity is vibrant due to its specific geographical and hydrological conditions.However,the diversity and features of foraminifera in such an environment have rarely been studied.We extracted environmental DNA(eDNA)in sedime nts and amplified the partial small subunit ribo somal DNA(SSU rDNA)of fo raminife ra to understand the foraminiferal diversity from four sites in Magellan Seamount(Western Pacific Ocean).Partial S SU rDNA sequencing was conducted and 912979 foraminiferal reads were obtained and gathered into 266 operational taxonomic units(OTUs).In the available dataset,a high proportion of rare OTUs and low identity OTUs in each studied sample showed that the Magellan Seamount foraminiferal community might have a high genetic novelty.The relative abundance of foraminifera varied between replicates probably due to the existence of bias in amplification process and patchiness of the deep-sea floor.It showed that the Magellan Seamount has a relatively high benthic foraminiferal diversity characterized mainly by monothalamiids(76.37%of total reads)in association with rotaliids(19.03%of total reads),including planktic foraminiferal sequences(38.58%of rotaliids;7.36%of total reads).The remaining reads were assigned to miliolids(0.83%of total reads)and textulariids(0.66%of total reads),and 3.11%of total reads are unassigned to a specific family.The co mparative analysis with foraminiferal assemblage s from coastal and deep-sea environme nts indicated that seamounts could aggregate species from a nearby deep-sea.

关键词： metabarcoding Magellan Seamount foraminifera Western Pacific Ocean

Ultrasmall Nanoparticle ROS Scavengers Based on Polyhedral Oligomeric Silsesquioxanes

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Chinese Journal of Polymer Science 2020年第11期38卷 1149-1156,I0004页

作者： Zhan li haotian li Jianhua Zhang Xianhu liu Zhipeng Gu Yiwen li College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065China School of Materials Science and Engineering Xihua UniversityChengdu 610039China National Engineering Research Center for Advanced Polymer Processing Technology Zhengzhou UniversityZhengzhou 450002China

Although tremendous efforts have been devoted to the structural and functional tailoring of natural polyphenol-functionalized nan oparticles,preparing ultrasmall sized(ligomeric silsesquioxanes(POSS)-based polyphenol nanopartides(T8^-,T10^-,and T12^-GAPOSS)by accurately functionalizing the POSS surface with plant polyphenol gallic acid units via thiol-Michael"click"reactions.Those polyphenol nanoparticles exhibited strong free radical scavenging capacity,good biocompatibility and ability to resist cell oxidative damage,which dem on strated great potentials in inhibiting oxidative stress in duced pathologies.

关键词： Polyhedral oligomeric silsesquioxanes(POSS) Polyphenol Ultrasmall nanoparticles Free radical scavenging

反兴奋剂教育的立法反思与规范形塑——基于中国高水平运动员及辅助人员反兴奋剂教育情况调查的实证研究

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武汉体育学院学报 2024年第2期58卷 30-37页

作者：李茵晖黎浩田章晓菲武汉大学法学院湖北武汉430064 中南财经政法大学体育部湖北武汉430005 中南财经政法大学统计与数学学院湖北武汉430005

《反兴奋剂条例(修订草案)》新增了关于反兴奋剂教育的一系列规定。值此修法之际,评估反兴奋剂教育的实际效果,对于反兴奋剂教育规则的规范塑造尤为重要。这涉及探寻何种因素显著影响了反兴奋剂教育效果,以及基于对这些显著影响因素的考... 详细信息

《反兴奋剂条例(修订草案)》新增了关于反兴奋剂教育的一系列规定。值此修法之际,评估反兴奋剂教育的实际效果,对于反兴奋剂教育规则的规范塑造尤为重要。这涉及探寻何种因素显著影响了反兴奋剂教育效果,以及基于对这些显著影响因素的考量,如何构建一个更加完善的反兴奋剂教育规则体系。对此,笔者进行了一项针对中国高水平运动员及辅助人员的反兴奋剂教育情况调查。研究发现,反兴奋剂教育活动的规格、时长、频次以及受访者的项目类型和学习意愿等因素对反兴奋剂教育效果起着显著作用。基于此,笔者提出应当从义务与权利规则整体均衡、规则设置考量要素系统均衡、规则内容构设动态均衡三个维度形塑反兴奋剂教育的法律规范,推动该领域规范供给的科学化、精细化,以确保在法治框架内贯彻落实习近平总书记关于反兴奋剂工作的重要指示精神。

关键词：反兴奋剂教育规则体系规范塑造均衡模型高水平运动员