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Automotive Innovation 2022年第1期5卷 29-42页

作者： Zhenpo Wang Lantian Li junjun deng Baokun Zhang Shuo Wang School of Mechanical Engineering Beijing Institute of TechnologyNO.5 Zhongguancun StreetBeijingChina Collaborative Innovation Center of Electric Vehicles in Beijing NO.5 Zhongguancun StreetBeijingChina

Fleets of autonomous vehicles including shuttle buses,freight trucks,and road sweepers will be deployed in the Olympic Vil-lage during Beijing 2022 Winter Olympics.This requires intelligent charging infrastructure based on wireless power transfer technology to be equipped.To increase the misalignment tolerance of a high-power wireless charger,the robustness of the magnetic coupler should be optimized.This paper presents a new type of unipolar coupler,which is composed of three con-nected coils in series.The dimensional configuration of the coils is analyzed by the finite element method.The characteristic parameters of the coil are identified with their influence on the self-inductance and coupling coefficient.An expert model is built,whose feasibility can be verified in the aimed design domain.Combined with the expert model,an improved simulated annealing algorithm with a backtracking mechanism is proposed.The primary coil can reach the expected characteristics from any starting parameter combination through the proposed optimization algorithm.Under the same conditions in terms of external circuit parameters,ferrite usage,and aluminum shielding,the offset sensitivity of the magnetic coupler can be reduced from 58.79%to 18.89%.A prototype is established,validating the feasibility of the proposed coil structure with the optimized parameter algorithm.

关键词： Wireless power transfer Magnetic coupler Simulated annealing algorithm Robust optimization

Modeling heterogeneous chemical processes on aerosol surface

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Particuology 2010年第4期8卷 308-318页

作者： junjun deng Tijian Wang Li Liu Fei Jiang School of Atraospheric Sciences Nanjing University 22 Hankou Road Nanjing 210093 China Guizhou Institute of Mountainous Climate and Environment Guiyang 550002 China

To explore the possible impact of heterogeneous chemical processes on atmospheric trace components, a coupled box model including gas-phase chemical processes, aerosol thermodynamic equilibrium processes, and heterogeneous chemical processes on the surface of dust, black carbon （BC） and sea salt is set up to simulate the effects of heterogeneous chemistry on the aerosol surface, and analyze the primary factors affecting the heterogeneous processes. Results indicate that heterogeneous chemical processes on the aerosol surface in the atmosphere will affect the concentrations of trace gases such as H2O2, HO2, O3, NO2, NO3, HNO3 and SO2, and aerosols such as SO42-, NO3- and NH4＋. Sensitivity tests suggest that the magnitude of the impact of heterogeneous processes strongly depends on aerosol concentration and the surface uptake coefficients used in the box model. However, the impact of temperature on heterogeneous chemical processes is considerably less. The ＂renoxification＂ of HNO3 will affect the components of the troPosPhere such as nitrogen oxide and ozone.

关键词： Box model Dust BC Sea salt Heterogeneous chemistry

A three-dimensional two-level gradient smoothing meshfree method for rainfall induced landslide simulations

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Frontiers of Structural and Civil Engineering 2019年第2期13卷 337-352页

作者： Dongdong WANG Jiarui WANG Junchao WU junjun deng Ming SUN Department of Civil Engineering and Xiamen Engineering Technology Center far Intelligent Maintenance of Infrastructures Xiamen UniversityXiamen 361005China Fujian Provincial Key Laboratory of Mathematical Modeling and High-Performance Scientific Computation Xiamen University Xiamen 361005China

A three-dimensional two-level gradient smoothing meshfree method is presented for rainfall induced landslide simulations. The two-level gradient smoothing for meshfree shape function is elaborated in the threedimensional Lagrangian setting with detailed implementation procedure. It is shown that due to the successive gradient smoothing operation without the requirement of derivative computation in the present formulation, the two-level smoothed gradient of meshfree shape function is capable of achieving a given influence domain more efficiently than the standard gradient of meshfree shape function. Subsequently, the two-level smoothed gradient of meshfree shape function is employed to discretize the weak form of coupled rainfall seepage and soil motion equations in a nodal integration format, as provides an efficient three-dimensional regularized meshfree formulation for large deformation rainfall induced landslide simulations. The exponential damage and pressure dependent plasticity relationships are utilized to describe the failure evolution in landslides. The plastic response of soil is characterized by the true effective stress measure, which is updated according to the rotationally neutralized objective integration algorithm. The effectiveness of the present threedimensional two?level gradient smoothing meshfree method is demonstrated through numerical examples.

关键词： meshfree method landslide rainfall three-dimensional two-level gradient smoothing nodal integration

Chassis Coordinated Control for Full X-by-Wire Vehicles-A Review

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Chinese Journal of Mechanical Engineering 2021年第2期34卷 1-25页

作者： Lei Zhang Zhiqiang Zhang Zhenpo Wang junjun deng David G.Dorrell National Engineering Laboratory for Electric Vehicles Beijing Institute of TechnologyBeijing 100081China Collaborative Innovation Center for Electric Vehicles in Beijing Beijing Institute of TechnologyBeijing 100081China School of Electrical and Information Engineering University of the WitwatersrandJohannesburgSouth Africa

An X-by-wire chassis can improve the kinematic characteristics of human-vehicle closed-loop system and thus active safety especially under emergency scenarios via enabling chassis coordinated control.This paper aims to provide a complete and systematic survey on chassis coordinated control methods for full X-by-wire vehicles,with the primary goal of summarizing recent reserch advancements and stimulating innovative thoughts.Driving condition identification including driver’s operation intention,critical vehicle states and road adhesion condition and integrated control of X-by-wire chassis subsystems constitute the main framework of a chassis coordinated control scheme.Under steering and braking maneuvers,different driving condition identification methods are described in this paper.These are the trigger conditions and the basis for the implementation of chassis coordinated control.For the vehicles equipped with steering-by-wire,braking-by-wire and/or wire-controlled-suspension systems,state-of-the-art chassis coordinated control methods are reviewed including the coordination of any two or three chassis subsystems.Finally,the development trends are discussed.

关键词： X-by-wire systems Chassis coordinated control Driving condition identification Active safety

Aerosol light absorption in a coastal city in Southeast China:Temporal variations and implications for brown carbon

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Journal of Environmental Sciences 2019年第6期31卷 257-266页

作者： Yuqing Qiu Xin Wu Yanru Zhang Lingling Xu Youwei Hong Jinsheng Chen Xiaoqiu Chen junjun deng Center for Excellence in Regional Atmospheric Environment Institute of Urban Environment Chinese Academy of Sciences Key Laboratory of Urban Environment and Health Institute of Urban Environment Chinese Academy of Sciences University of Chinese Academy of Sciences Fujian Environmental Monitoring Station Institute of Surface-Earth System Science Tianjin University

Light-absorbing carbonaceous aerosols including black carbon(BC) and brown carbon(BrC)play significant roles in atmospheric radiative properties. One-year measurements of aerosol light absorption at multi-wavelength were continuously conducted in Xiamen,southeast of China in 2014 to determine the light absorption properties including absorption coefficients(σabs) and absorption ?ngstr?m exponent(AAE) in the coastal city.Light absorptions of BC and BrC with their contributions to total light absorption were further quantified. Mean σabsat 370 nm and 880 nm were 56.6 ± 34.3 and 16.5 ± 11.2 Mm-1,respectively. σabspresented a double-peaks diurnal pattern with the maximum in the morning and the minimum in the afternoon. σabswas low in warm seasons and high in cold seasons. AAE ranged from 0.26 to 2.58 with the annual mean of 1.46, implying that both fossil fuel combustion and biomass burning influenced aerosol optical properties. σabsof BrC at 370 nm was 24.0 ± 5.7 Mm-1, contributing 42% to the total absorption. The highest AAE(1.52 ± 0.02) and largest BrC contributions(47% ± 4%) in winter suggested the significant influence of biomass burning on aerosol light absorption. Long-distance air masses passing through North China Plain and the Yangtze River Delta led to high AAE and BrC contributions. High AAE value of 1.46 in July indicated that long-range transport of the air pollutants from intense biomass burning in Southeast Asia would affect aerosol light absorption in Southeast China. The study will improve the understanding of light absorption properties of aerosols and the optical impacts of BrC in China.

关键词： Light absorption Brown carbon Black carbon Absorption Angstrom exponent Biomass burning Western Taiwan Strait

Chemical characterization and source apportionment of atmospheric submicron particles on the western coast of Taiwan Strait, China

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Journal of Environmental Sciences 2017年第2期29卷 293-304页

作者： Liming Cao Qiao Zhu Xiaofeng Huang junjun deng Jinsheng Chen Youwei Hong Lingling Xu Lingyan He Key Laboratory for Urban Habitat Environmental Science and Technology School of Environment and Energy Peking University Shenzhen Graduate School Center for Excellence in Urban Atmospheric Environment Institute of Urban Environment Chinese Academy of Sciences

Taiwan Strait is a special channel for subtropical East Asian Monsoon and its western coast is an important economic zone in China. In this study, a suburban site in the city of Xiamen on the western coast of Taiwan Strait was selected for fine aerosol study to improve the understanding of air pollution sources in this region. An Aerodyne high-resolution time-of-flight aerosol mass spectrometer（HR-To F-AMS） and an Aethalometer were deployed to measure fine aerosol composition with a time resolution of 5 min from May 1to 18, 2015. The average mass concentration of PM1 was 46.2 ± 26.3 μg/m^3 for the entire campaign. Organics（28.3%）, sulfate（24.9%）, and nitrate（20.6%） were the major components in the fine particles, followed by ammonium, black carbon（BC）, and chloride. Evolution of nitrate concentration and size distribution indicated that local NOx emissions played a key role in high fine particle pollution in Xiamen. In addition, organic nitrate was found to account for 9.0%–13.8% of the total measured nitrate. Positive Matrix Factorization（PMF）conducted with high-resolution organic mass spectra dataset differentiated the organic aerosol into three components, including a hydrocarbon-like organic aerosol（HOA） and two oxygenated organic aerosols（SV-OOA and LV-OOA）, which on average accounted for 27.6%,28.8%, and 43.6% of the total organic mass, respectively. The relationship between the mass concentration of submicron particle species and wind further confirmed that all major fine particle species were influenced by both strong local emissions in the southeastern area of Xiamen and regional transport through the Taiwan Strait.

关键词： Submicron particle Chemical characterization Organic aerosol Source apportionment

Fluorescence Properties and Chemical Composition of Fine Particles in the Background Atmosphere of North China

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Advances in Atmospheric Sciences 2023年第7期40卷 1159-1174页

作者： Ping LI Siyao YUE Xiaoyang YANG Di LIU Qiang ZHANG Wei HU Shengjie HOU Wanyu ZHAO Hong REN Gang LI Yuanguan GAO junjun deng Qiaorong XIE Yele SUN Zifa WANG Pingqing FU State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China Institute of Surface-Earth System Science School of Earth System ScienceTianjin UniversityTianjin 300072China University of Chinese Academy of Sciences Beijing 100049China

To understand the aerosol characteristics in a regional background environment,fine-particle(PM_(2.5),n=228)samples were collected over a one-year period at the Shangdianzi(SDZ)station,which is a Global Atmospheric Watch regional background station in North China.The chemical and optical characteristics of PM_(2.5)were analyzed,including organic carbon,elemental carbon,water-soluble organic carbon,water-soluble inorganic ions,and fluorescent components of watersoluble organic matter.The source factors of major aerosol components are apportioned,and the sources of the fluorescent chromophores are further analyzed.The major chemical components of PM_(2.5)at SDZ were NO_(3)^(-),organic matter,SO_(4)^(2-),and NH_(4)^(+).Annually,water-soluble organic carbon contributed 48%±15%to the total organic carbon.Secondary formation(52%)and fossil fuel combustion(63%)are the largest sources of water-soluble organic matter and water-insoluble organic matter,respectively.In addition,three humic-like and one protein-like matter were identified via parallel factor analysis for excitation–emission matrices.The fluorescence intensities of the components were highest in winter and lowest in summer,indicating the main impact of burning sources.This study contributes to understanding the chemical and optical characteristics of ambient aerosols in the background atmosphere.

关键词： fine aerosols excitation-emission matrix fluorescence properties primary biological aerosols Shangdianzi

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新能源汽车碳减排潜力分析

北京理工大学学报 2024年第2期44卷 111-122页

作者：王震坡詹炜鹏孙逢春邓钧君崔丁松黎小慧北京理工大学机械与车辆学院电动车辆国家工程研究中心北京100081

在“碳达峰、碳中和”双碳目标驱动下,新能源汽车凭借其碳减排优势受到了广泛关注.旨在促进新能源汽车碳减排潜力评估的相关研究,从新能源汽车碳排放计量与分析、车网协同优化低碳运行、车辆碳排放总量态势预测等三个方面进行分析与综述... 详细信息

在“碳达峰、碳中和”双碳目标驱动下,新能源汽车凭借其碳减排优势受到了广泛关注.旨在促进新能源汽车碳减排潜力评估的相关研究,从新能源汽车碳排放计量与分析、车网协同优化低碳运行、车辆碳排放总量态势预测等三个方面进行分析与综述,归纳了相关领域最新研究成果,总结各类建模方法优缺点,重点阐述了汽车节能减排核算体系与行业碳排放管理体系等相关成果,并提出新能源汽车碳减排潜力分析研究的发展趋势及未来研究方向.

关键词：新能源汽车碳排放减排潜力

China's battery electric vehicles lead the world:achievements in technology system architecture and technological breakthroughs

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Green Energy and Intelligent Transportation 2022年第1期1卷 2-25页

作者： Hongwen He Fengchun Sun Zhenpo Wang Cheng Lin Chengning Zhang Rui Xiong junjun deng Xiaoqing Zhu Peng Xie Shuo Zhang Zhongbao Wei Wanke Cao Li Zhai National Engineering Research Centre of Electric Vehicles Beijing Institute of TechnologyBeijing100081PR China

Developing new energy vehicles has been a worldwide consensus,and developing new energy vehicles characterized by pure electric drive has been China's national strategy.After more than 20 years of high-quality development of China's electric vehicles(EVs),a technological R&D layout of“Three Verticals and Three Horizontals”has been created,and technological advantages have been accumulated.As a result,China's new energy vehicle market has ranked first in the world since 2015.To systematically solve the key problems of battery electric vehicles(BEVs)such as“driving range anxiety,long battery charging time,and driving safety hazards”,China took the lead in putting forward a“system engineering-based technology system architecture for BEVs”and clarifying its connotation.This paper analyzes the research status and progress of the three core components of this architecture,namely,“BEV platform,charging/swapping station,and real-time operation monitoring platform”,and their key technological points.The three major demonstration projects of the 2008 Beijing Olympic Games,the 2022 Beijing Winter Olympics,and the intelligent and connected autonomous battery electric bus project are discussed to specify the applications of BEVs in China.The key research directions for upgrading BEV technologies remain to be further improving the vehicle-level all-climate environmental adaptability and all-day safety of BEVs,systematically solving the charging problem of BEVs and improving their application convenience,and safeguarding safety with early warning and implementing active/passive safety protection for the whole life cycle of power batteries on the basis of BEVs'operation big data.BEVs have acquired new technological features such as intelligent and networked technology empowerment,extensive integration of control-by-wire systems,a platform of chassis hardware,and modularization of functional software.

关键词： Battery electric vehicle(BEV) Charging/swapping station Operation monitoring platform Technology system Motor drive system All-climate Battery Battery safety China

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抗黄化曲叶病毒樱桃番茄新品种金宝的选育

中国蔬菜 2024年第1期 112-114页

作者：邓军均高敏何洁王炳琳孙红波朱宏华严寒杨源西安市农业技术推广中心西安市农业科学研究所陕西西安710061 西安市农产品质量安全检验检测中心陕西西安710077 西安市种子管理站陕西西安710054

金宝是以自交系hy15-1-5为母本,以10-4-6为父本配制而成的樱桃番茄一代杂种。无限生长类型,中熟,植株生长势强,叶量中等,坐果能力强,果实卵圆形,幼果有绿果肩,成熟果橘红色,果肉酥软,酸甜可口;单果质量25 g左右,可溶性固形物含量8.9%,... 详细信息

金宝是以自交系hy15-1-5为母本,以10-4-6为父本配制而成的樱桃番茄一代杂种。无限生长类型,中熟,植株生长势强,叶量中等,坐果能力强,果实卵圆形,幼果有绿果肩,成熟果橘红色,果肉酥软,酸甜可口;单果质量25 g左右,可溶性固形物含量8.9%,总糖含量15.0%,番茄红素含量2.50 mg·kg^(-1),VC含量113.0 mg·kg^(-1);一般产量3 700 kg·(667m^(2))^(-1)左右,含有番茄黄化曲叶病毒抗性基因Ty-2,田间对番茄黄化曲叶病毒病的抗性明显强于对照碧娇和金妃,适宜陕西地区早春保护地种植。

关键词：樱桃番茄金宝一代杂种抗TYLCV