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Nano Research 2024年第4期17卷 2360-2367页

作者： Xiao-Yan Li Manyi Duan pengfei ou Department of Electrical and Computer Engineering University of TorontoTorontoOntario M5S 1A4Canada School of Physics and Electronic Engineering Sichuan Normal UniversityChengdu 610101China Department of Chemistry Northwestern UniversityEvanstonIL 60208USA

The discovery of metal-nitrogen centers as the active sites for electrolysis has aroused significant interest in utilizing single-atom catalysts for nitrogen reduction reaction(NRR).Properly designed nanostructured catalysts that strongly interact with nitrogen molecules(N_(2))can promote adsorption and activation,thereby resulting in efficient catalysts with high stability,activity,and *** this study,using density functional theory calculations,we selected monolayer black phosphorus(BP)as the substrate and screened a series of single-atom transition metals confined in tri-coordinated and tetra-coordinated active centers(without and with N dopants)to electro-catalyze *** a result,we have identified two promising candidates(Hf_(1)-N_(1)P_(2)-1 and Tc_(1)-N_(4)),which exhibit not only low overpotentials of 0.56 and 0.49 V but also high thermodynamic and electrochemical stability,as well as good selectivity towards NRR over the competing hydrogen evolution *** also demonstrate the ability of Hf_(1)-N_(1)P_(2)-1 and Tc_(1)-N_(4) to activate and hydrogenate N_(2) by donating electrons and regulating charge *** study not only predicts new BP-based promising catalysts but also provides guidance for the rational design of high-performance NRR electrocatalysts under ambient conditions.

关键词： N_(2) electroreduction reaction single-atom catalysts black phosphorus density functional theory high-throughput calculations

Efficient photoelectrochemical conversion of CO_(2)to syngas by photocathode engineering

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Green Energy & Environment 2022年第3期7卷 545-553页

作者： Sheng Chu pengfei ou Roksana Tonny Rashid Yuyang Pan Daolun Liang Huiyan Zhang Jun Song Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and EnvironmentSoutheast UniversityNanjing210096China Department of Electrical and Computer Engineering McGill UniversityMontrealQC H3A 0E9Canada Department of Mining and Materials Engineering McGill UniversityMontrealQC H3A 0C5Canada

The synthesis of renewable chemical fuels from CO_(2) and H_(2)O via photoelectrochemical(PEC)route reprensents a promising room-temperature approach for transforming greenhouse gas into value-added chemicals(e.g.,syngas),but to date it has been hampered by the lack of efficient photocathode for CO_(2) ***,we report efficient PEC CO_(2) reduction into syngas by photocathode *** photocathode is consisting of a planar p-n Si junction for strong light harvesting,GaN nanowires for efficient electron extraction and transfer,and Au/TiO_(2)for rapid electrocatalytic syngas *** photocathode yields a record-high solar energy conversion efficiency of 2.3%.Furthermore,desirable syngas compositions with CO/H_(2)ratios such as 1:2 and 1:1 can be produced by simply varying the size of Au *** calculations reveal that the active sites for CO and H_(2)generation are the facet and undercoordinated sites of Au particles,respectively.

关键词： syngas photocathode photoelectrochemical

Isolated Cu-Sn diatomic sites for enhanced electroreduction of CO_(2)to CO

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Nano Research 2023年第7期16卷 8729-8736页

作者： Wei Liu Haoqiang Li pengfei ou Jing Mao Lili Han Jun Song Jun Luo Huolin L.Xin State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Department of Physics and Astronomy University of CaliforniaIrvineCA 92697USA Tsinghua Shenzhen International Graduate School Tsinghua UniversityShenzhen 518055China School of Materials Science and Engineering Tianjin Key Lab of Photoelectric Materials&DevicesTianjin University of TechnologyTianjin 300384China Department of Mining and Materials Engineering McGill UniversityMontreal H3A 0C5Canada Teaching and Analytical Instrumentation Center School of Materials Science and EngineeringTianjin UniversityTianjin 300072China

Electrochemical CO_(2)reduction reaction(CO_(2)RR)to high-value product,CO,not only provides a key feedstock for the wellestablished Fischer-Tropsch process but also mitigates the greenhouse ***,it suffers from sluggish reaction kinetics,competitive hydrogen evolution reaction,and low ***,we report non-precious Cu-Sn diatomic sites anchored on nitrogen-doped porous carbon(CuSn/NPC)as an efficient catalyst for CO_(2)RR to *** catalyst exhibits outstanding selectivity with CO Faradaic efficiency(FE)up to 99.1%,much higher than those of individual Cu(66.2%)and Sn(51.3%)single-atom ***,high stability is confirmed by consecutive 24 h electrolysis with high selectivity from CO_(2)to *** calculations reveal an obvious activation of CO_(2)with weakened C-O bonds and distorted CO_(2)configuration upon chemisorption on the CuSn/NPC *** is also suggested CuSn/NPC is more selective for the CO_(2)RR with dominant CO production during the electrolysis,rather than the competing hydrogen evolution reaction.

关键词： CO_(2)reduction reaction Cu-Sn active site CO product dual-atom electrocatalyst density functional theory(DFT)calculation

Study on Co-simulation of a Dual-motor EPS for Commercial Vehicle Based on ADAMS and MATLAB

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Study on Co-simulation of a Dual-motor EPS for Commercial Ve...

第36届中国控制会议

作者： Yaohua Li pengfei ou Yangsen Zhang Qianlong Feng Peng Xu Chang’an University School of Automobile

ISBN: (纸本)9781538629185

A multi-body dynamics model was established in *** to the working principle of the electric power steering system(EPS),the linear assistant power curve and control strategy were designed in Matlab/*** the corresponding fault-tolerant control strategy is designed for the current distribution *** co-simulation was carried out and the result shows that the dual-motor EPS can meet the requirements of the steering system,and has good fault-tolerant *** vehicle handling stability performance was improved.

关键词： Electric power steering Adams Matlab Co-simulation Control strategy

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混和输入整形控制策略快速抑制机器人振动

西北工业大学学报 2019年第3期37卷 636-642页

作者：魏玉兰李兵张清珠欧鹏飞湖州师范学院工学院浙江湖州313000 麦吉尔大学机械工程系加拿大蒙特利尔H3A0C3 麦吉尔大学采矿与材料工程系加拿大蒙特利尔H3A0C5

当多模态系统中各个模态的振动幅度和共振频带宽度差异明显时,正脉冲多模态输入整形器在有效减小残余振动的同时却增加了系统响应时间,而负脉冲混合多模态输入整形方法可解决该问题。介绍了其控制策略的基本原理和一个3-DOF并联机器人,... 详细信息

当多模态系统中各个模态的振动幅度和共振频带宽度差异明显时,正脉冲多模态输入整形器在有效减小残余振动的同时却增加了系统响应时间,而负脉冲混合多模态输入整形方法可解决该问题。介绍了其控制策略的基本原理和一个3-DOF并联机器人,并构造6种减小该机器人前2个模态振动的负脉冲混合输入整形器。使用仿真获得了各种负脉冲混合两模态输入整形器(NHTIS)的振动响应曲线,分析了其响应时间和抑制振动的能力,并分别与正脉冲、负脉冲两模态输入整形器对比。结果表明NHTIS能在减小多模态残余振动的同时提高系统响应速度。

关键词：输入整形多模态负脉冲混合振动控制机器人

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商用车全车质量EPS系统助力特性仿真分析

汽车工程 2019年第4期41卷 432-439页

作者：李耀华冯乾隆张洋森南友飞欧鹏飞长安大学汽车学院西安710064

为提高载荷变化较大的工况下商用车的转向性能,本文中提出了一种商用车全车质量助力特性电动助力转向系统(electric power steering, EPS),对其助力特性和控制策略进行了研究,并通过TruckSim与Simulink联合仿真,对比了全车质量助力特性... 详细信息

为提高载荷变化较大的工况下商用车的转向性能,本文中提出了一种商用车全车质量助力特性电动助力转向系统(electric power steering, EPS),对其助力特性和控制策略进行了研究,并通过TruckSim与Simulink联合仿真,对比了全车质量助力特性EPS系统、单一车质量助力特性EPS系统和无EPS系统的性能。结果表明:全车质量助力特性EPS系统可使商用车具有良好的转向轻便性,改善了操纵稳定性,并且减小了车质量变化对转向性能的影响,从而使驾驶员获得更清晰的路感。

关键词：全车质量助力特性 EPS系统控制策略联合仿真

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中国汽车市场预测及细分领域市场案例分析

汽车实用技术 2019年第23期45卷 239-244页

作者：欧鹏飞冯乾隆中国汽车技术研究中心有限公司

文章主要通过Logistic与灰色理论构建汽车市场保有量的组合预测模型,并与单独使用Logistic模型进行对比,验证了组合预测模型在预测市场保有量上更为精确,然后根据模型预测得到未来汽车保有量情况。结合保有量与销量的关系构建两者关系模... 详细信息

文章主要通过Logistic与灰色理论构建汽车市场保有量的组合预测模型,并与单独使用Logistic模型进行对比,验证了组合预测模型在预测市场保有量上更为精确,然后根据模型预测得到未来汽车保有量情况。结合保有量与销量的关系构建两者关系模型,并对汽车市场销量进行预测。最后以皮卡为案例对细分领域市场进行分析,预测得到细分市场的市场销量,从而为政府及企业决策提供理论依据。

关键词：组合预测模型汽车保有量市场销量预测

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基于GPU的长轨SAR实时成像算法

数据采集与处理 2023年第6期38卷 1380-1391页

作者：谭运馨黄海风赖涛但琪洪欧鹏飞中山大学系统科学与工程学院广州510006 中山大学电子与通信工程学院深圳518107

为了满足长轨道超高分辨W波段合成孔径雷达(Synthetic aperture radar,SAR)的快速成像需求,本文提出了一种基于图形处理器(Graphics processing unit,GPU)的ω-K实时成像算法,该算法采用并行架构和双流多线程的处理方式。默认流沿着物... 详细信息

为了满足长轨道超高分辨W波段合成孔径雷达(Synthetic aperture radar,SAR)的快速成像需求,本文提出了一种基于图形处理器(Graphics processing unit,GPU)的ω-K实时成像算法,该算法采用并行架构和双流多线程的处理方式。默认流沿着物理原理的方向进行数据处理,首先对距离补偿、误差校正和补零等操作进行并行化处理,然后采用一层嵌套的插值方式,通过维持上下层的依赖关系和同步管理就能达到约30的加速比。阻塞流与默认流同时启动,生成默认流所需的参数和函数,并在执行前将其存入显存,极大地缩小了算法的运行时间,同时通过在默认流上设置事件以保持双流的同步并行执行。实验结果表明,算法总的加速比可达13左右,幅值和相位相对误差趋近0,不仅具有良好的实时性、聚焦性,还保持了良好的成像效果。

关键词：长轨道合成孔径雷达图形处理器实时成像 Stolt插值 ω-K算法

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面向FAST馈源仓定位的微波测距系统设计

系统工程与电子技术 2022年第1期44卷 10-19页

作者：赖涛魏玺章黄海风欧鹏飞智国平于东俊孙京海中山大学电子与通信工程学院广东广州510275 北京空间飞行器总体设计部北京100094 中国科学院国家天文台北京100101

500 m口径球面射电望远镜(five-hundred-meter aperture spherical radio telescope, FAST)是近年建成的重大科学装置,其高效运行依赖于对馈源仓的高精度定位。当前基于全站仪测距的馈源仓定位系统在雨雾等恶劣天气中无法有效工作,降低... 详细信息

500 m口径球面射电望远镜(five-hundred-meter aperture spherical radio telescope, FAST)是近年建成的重大科学装置,其高效运行依赖于对馈源仓的高精度定位。当前基于全站仪测距的馈源仓定位系统在雨雾等恶劣天气中无法有效工作,降低了FAST工作时长。针对此问题,提出一种基于微波测距的新方案,有望在满足馈源仓定位精度的同时,显著改善FAST的运行效率,使之实现全天候全天时工作。深入研究了微波测距定位系统中亟待解决的若干关键科学问题,初步给出了系统方案与技术路线。根据理论分析,该微波测距系统的定位误差优于±5 mm,可达到设计要求。

关键词： 500 m口径球面射电望远镜微波测距仪多频相位测距法系统误差校正

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同轴并联式混合动力客车动力系统仿真研究

汽车实用技术 2018年第8期44卷 12-14页

作者：欧鹏飞冯乾隆张洋森长安大学汽车学院陕西西安710064

为了优化混合动力客车的燃油经济性,达到提高行驶性能的目的,文章设计了一种基于逻辑门转矩分配的控制策略,分析了驱动转矩分配规则和制动转矩分配规则,设计了适用于同轴并联式混合动力客车的控制策略,通过仿真验证了所建模型的正确性... 详细信息

为了优化混合动力客车的燃油经济性,达到提高行驶性能的目的,文章设计了一种基于逻辑门转矩分配的控制策略,分析了驱动转矩分配规则和制动转矩分配规则,设计了适用于同轴并联式混合动力客车的控制策略,通过仿真验证了所建模型的正确性以及控制策略的有效性。

关键词：混合动力城市客车动力总成控制策略建模仿真瞬态工况