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Configuration Design and Size Optimization of a High-Precision Novel Parallel Pointing Mechanism Based on Interference Separation

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Chinese Journal of Mechanical Engineering 2024年第5期37卷 365-386页

作者： Sen Wang Shihua Li Xueyan Han jiahao wei Xueyuan Gao Hongyu Xu Hebei Provincial Key Laboratory of Parallel Robot and Mechatronic Systems Yanshan UniversityQinhuangdao 066004China School of Mechanical Engineering Yanshan UniversityQinhuangdao 066004China

Pointing mechanism is widely used in aerospace field,and its pointing accuracy and stability have high *** pointing mechanism will be affected by external interference when it *** order to eliminate the impact of interference forces on the output accuracy of the mechanism,firstly,this paper proposes a design method for highprecision pointing mechanisms based on interference separation,aiming at the high-precision pointing requirements of pointing *** on the screw theory,a synthesis method for inner compensation mechanisms has been *** a new type of double-layer parallel mechanism has been designed to compensate for interference ***,the kinematics and dynamics of the mechanism are carried *** evaluation index for compensating external interference forces is *** interference compensation analysis is conducted for the pointing *** correctness of the proposed interference force compensation coefficient is ***,in order to find the optimal solution for the workspace and interference force compensation coefficient of the pointing mechanism,multi-objective optimization design of the structural parameters of the mechanism was carried out based on the particle swarm optimization *** provides a theoretical basis for the prototype design of the subsequent double-layer parallel *** double-layer parallel mechanism combines the advantages of large load-bearing capacity,large workspace,and high output *** can be better applied in the aerospace field where high-precision pointing and force interference compensation are integrated.

关键词： Pointing mechanism Interference separation Double-layer parallel mechanism Force compensation coefficient Multi-objective optimization

D-band center coordination modulated enzyme-like activity in Fe-Cu dual-metal single-atom nanozymes

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Nano Research 2024年第7期17卷 5872-5883页

作者： Ling Liu Shaofang Zhang Guo Li Yadong Zhe Jiamin Liu Xinxu Zhang jiahao wei Xin Sun Yonghui Li Xiao-Dong Zhang Tianjin Key Laboratory of Brain Science and Neural Engineering Academy of Medical Engineering and Translational MedicineTianjin UniversityTianjin 300072China Department of Physics and Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology School of SciencesTianjin UniversityTianjin 300350China

After explorations in a diversity of single-atom nanozymes(SAzymes),developing dual-centered SAzymes becomes a promising approach for superior catalytic *** confusing mechanisms including atomic coordination,spatial configuration,and metal–metal atom interaction hinder the development and design of ***,a dual-centered Fe-Cu-N_(x)SAzyme exhibits excellent peroxidase(POD)-and catalase(CAT)-like activities with d-band center(ε_(d))coordination of Fe and Cu in multiple reaction stages,which plays a critical role in the adsorption of H_(2)O_(2)molecule and H_(2)O and O_(2)***,the dband center coordination,which can be represented byε_(d)(Fe)–ε_(d)(Cu)shifts,leads to the competition between one-side and bilateral adsorption,which determines the favorable reaction path with lower energy *** on experimental statistics,simulated formation energies,and reaction barriers,3 configurations,Fe-Cu-N6-I,Fe-Cu-N_(8)-II,and Fe-Cu-N_(8)-III,are modeled and ***,configuration-dependent catalytic selectivity and the competition between one-side and bilateral adsorption can be unveiled by d-band center coordination paradigm *** simulations suggest that the unsymmetrical charge distribution over the three Fe-Cu configurations could tune the adsorption strength compared with the counterparts FeN_(4)and CuN_(4).The present work provides a potential route for optimizing enzyme-like catalysis by designing the dual-or even triple-metal SAzymes,which demonstrates the large space to modulate the metal atomic configuration and interaction.

关键词： single-atom catalysis Fe-Cu dual-metal d-band center coordination enzyme mimicking competitive adsorption mechanisms

Enhancing performance of inverted quantum-dot light-emitting diodes based on a solution-processed hole transport layer via ligand treatment

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Journal of Semiconductors 2023年第9期44卷 68-74页

作者： Depeng Li Jingrui Ma Wenbo Liu Guohong Xiang Xiangwei Qu Siqi Jia Mi Gu jiahao wei Pai Liu Kai Wang Xiaowei Sun Institute of Nanoscience and Applications and Department of Electrical and Electronic EngineeringSouthern University of Science and TechnologyShenzhen 518055China Key Laboratory of Energy Conversion and Storage Technologies(Southern University of Science and Technology) Ministry of EducationGuangdong University Key Laboratory for Advanced Quantum Dot Displays and Lightingand Shenzhen Key Laboratory for Advanced Quantum Dot Displays and LightingSouthern University of Science and TechnologyShenzhen 518055China Institute of Advanced Displays and Imaging Henan Academy of SciencesZhengzhou 450046China

The performance of inverted quantum-dot light-emitting diodes(QLEDs)based on solution-processed hole transport layers(HTLs)has been limited by the solvent-induced damage to the quantum dot(QD)layer during the spin-coating of the *** lack of compatibility between the HTL’s solvent and the QD layer results in an uneven surface,which negatively impacts the overall device *** this work,we develop a novel method to solve this problem by modifying the QD film with 1,8-diaminooctane to improve the resistance of the QD layer for the HTL’s *** uniform QD layer leads the inverted red QLED device to achieve a low turn-on voltage of 1.8 V,a high maximum luminance of 105500 cd/m2,and a remarkable maximum external quantum efficiency of 13.34%.This approach releases the considerable potential of HTL materials selection and offers a promising avenue for the development of high-performance inverted QLEDs.

关键词： quantum dots quantum-dot light-emitting diodes inverted structure ligand treatment

Optimizing electronic structure through point defect engineering for enhanced electrocatalytic energy conversion

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Green Energy & Environment 2025年第1期10卷 109-131页

作者： wei Ma jiahao Yao Fang Xie Xinqi Wang Hao Wan Xiangjian Shen Lili Zhang Menggai Jiao Zhen Zhou Interdisciplinary Research Center for Sustainable Energy Science and Engineering(IRC4SE2) School of Chemical EngineeringZhengzhou UniversityHenan450001China

Point defect engineering endows catalysts with novel physical and chemical properties,elevating their electrocatalytic *** introduction of defects emerges as a promising strategy,effectively modifying the electronic structure of active *** optimization influences the adsorption energy of intermediates,thereby mitigating reaction energy barriers,altering paths,enhancing selectivity,and ultimately improving the catalytic efficiency of *** elucidate the impact of defects on the electrocatalytic process,we comprehensively outline the roles of various point defects,their synthetic methodologies,and characterization ***,we consolidate insights into the relationship between point defects and catalytic activity for hydrogen/oxygen evolution and CO_(2)/O_(2)/N_(2) reduction reactions by integrating mechanisms from diverse *** underscores the pivotal role of point defects in enhancing catalytic *** last,the principal challenges and prospects associated with point defects in current electrocatalysts are proposed,emphasizing their role in advancing the efficiency of electrochemical energy storage and conversion materials.

关键词： Point defect engineering Doping Vacancy Electrocatalysis Electronic structure

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基于模型预测控制的接触器开关弹跳抑制研究

中国电机工程学报 2017年第9期37卷 2717-2724页

作者：郭凯伟王立国张超羽魏家昊哈尔滨工业大学电气工程系黑龙江省哈尔滨市150001

该文立足于ABB同步开关技术前沿,基于运动轨迹模型预测进行一类接触器通用弹跳抑制策略研究,旨在不改变接触器自身机械结构参数的前提下从算法角度实现永磁接触器的弹跳控制。核心在于建立永磁接触器运动轨迹的动力学方程,通过模型求解... 详细信息

该文立足于ABB同步开关技术前沿,基于运动轨迹模型预测进行一类接触器通用弹跳抑制策略研究,旨在不改变接触器自身机械结构参数的前提下从算法角度实现永磁接触器的弹跳控制。核心在于建立永磁接触器运动轨迹的动力学方程,通过模型求解探索接触器弹跳发生的数学机理,对接触器驱动电压的幅值与作用时间进行模型预测控制(model predictive control,MPC)预测,以响应时间最短为优化准则,确保动触头与静触头相接触时速度为零,据此给出驱动电压的取值准则。以某10k V电网母线PT烧毁等严重影响电网安全稳定运行的难题为背景进行接触器弹跳抑制研究,实验表明,所开发MPC策略可有效降低高电压补偿器接触器弹跳导致的涌流冲击,可为开发具有中国特色的同步开关技术提供参考基础。

关键词：弹跳抑制模型预测控制高电压补偿器同步开关

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加强建筑设计与建筑设计合理性的研究

山西建筑 2018年第3期44卷 24-25页

作者：魏佳豪湖北工程学院湖北孝感432000

介绍了建筑设计的概念,分析了设计合理性对建筑设计的影响,探讨了建筑设计合理性的基本原则,用合理选材、结构优化、加强关键环节设计、完善图纸设计的方法,达到了提高建筑设计合理性的目的。

关键词：建筑设计结构优化基本原则

基于PCC暂态电压稳定性分析的T-PAPF补偿装置研究

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电测与仪表 2016年第22期53卷 1-5页

作者：魏家昊王立国哈尔滨工业大学电气工程及自动化学院哈尔滨150001

为解决单独使用有源电力滤波器补偿谐波与无功时所需有源容量较大所带来工业经济成本过高这一实际问题,文章将并联型有源电力滤波器(PAPF)与晶闸管投切滤波器(TSF)结合构成T-PAPF补偿装置。分析装置的拓扑结构及基本原理,对系统参数及... 详细信息

为解决单独使用有源电力滤波器补偿谐波与无功时所需有源容量较大所带来工业经济成本过高这一实际问题,文章将并联型有源电力滤波器(PAPF)与晶闸管投切滤波器(TSF)结合构成T-PAPF补偿装置。分析装置的拓扑结构及基本原理,对系统参数及控制策略进行设计,利用求解系统主导不稳定平衡点(CUEP)的方法对装置公共连接点(PCC)的暂态电压稳定性进行分析,并利用Matlab对系统进行仿真。仿真结果表明TPAPF的投入增强了PCC暂态电压稳定性,极大地降低了网侧谐波含量并提高了系统的功率因数,很适用于非线性负载的补偿,并能有效降低有源补偿的容量,提高了工程的经济性。

关键词： T-PAPF PCC电压稳定性补偿容量无功与谐波

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春秋时期赋诗行为中“取义”的两个问题简述

西北成人教育学院学报 2023年第4期 106-112页

作者：魏家豪中央民族大学哲学与宗教学学院北京市海淀区100081

通过对“赋诗断章”和“断章取义”概念的考察,本研究首先澄清了一个误区:“赋诗断章”和赋诗全篇并非前者包含后者。尔后本研究从《左传》记载的春秋时期赋诗行为中“取义”问题两方面展开。其一是“断章取义”的行为主体单一但不固定... 详细信息

通过对“赋诗断章”和“断章取义”概念的考察,本研究首先澄清了一个误区:“赋诗断章”和赋诗全篇并非前者包含后者。尔后本研究从《左传》记载的春秋时期赋诗行为中“取义”问题两方面展开。其一是“断章取义”的行为主体单一但不固定,可为赋诗者或赋诗接受者。其二,赋诗者赋诗全篇时,是出于对全篇意蕴的整体把握,并非杜预所说的“多取首章之义”,这同当时实际情况不符。

关键词：诗 “赋诗断章” “断章取义” 诗学观念

Configu ation Design and Size Optimization of a High-Precision Novel Parallel Pointing Mechanism Based on Interference Separation

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Chinese Journal of Mechanical Engineering 2024年第5期 384-405页

作者： Sen Wang Shihua Li Xueyan Han jiahao wei Xueyuan Gao Hongyu Xu Hebei Provincial Key Laboratory of Parallel Robot and Mechatronic Systems Yanshan University School of Mechanical Engineering Yanshan University

Pointing mechanism is widely used in aerospace field, and its pointing accuracy and stability have high *** pointing mechanism will be affected by external interference when it works. In order to eliminate the impact of interference forces on the output accuracy of the mechanism, firstly, this paper proposes a design method for highprecision pointing mechanisms based on interference separation, aiming at the high-precision pointing requirements of pointing mechanisms. Based on the screw theory, a synthesis method for inner compensation mechanisms has been proposed. And a new type of double-layer parallel mechanism has been designed to compensate for interference forces. Then, the kinematics and dynamics of the mechanism are carried out. An evaluation index for compensating external interference forces is proposed. The interference compensation analysis is conducted for the pointing mechanism. The correctness of the proposed interference force compensation coefficient is ***, in order to find the optimal solution for the workspace and interference force compensation coefficient of the pointing mechanism, multi-objective optimization design of the structural parameters of the mechanism was carried out based on the particle swarm optimization algorithm. This provides a theoretical basis for the prototype design of the subsequent double-layer parallel mechanism. This double-layer parallel mechanism combines the advantages of large load-bearing capacity, large workspace, and high output accuracy. It can be better applied in the aerospace field where high-precision pointing and force interference compensation are integrated.

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