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Half‑Power Prediction and Its Application on the Energy Management Strategy for Fuel Cell City Bus

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Automotive Innovation 2023年第1期6卷 131-142页

作者： Longhai Zhang lina Ning Xueqing Yang Sheng Zeng Tian Yuan gaopeng li Changchun Ke Junliang Zhang Institute of Fuel Cells School of Mechanical EngineeringShanghai Jiao Tong University800 Dongchuan RoadShanghai 200240China Yutong Bus Co LtdZhengzhou 450016China

The fuel cell hybrid powertrain is a potential power supply system for fuel cell vehicles.The underlying problem is that the fuel cell vehicles encounter exhaustive hydrogen consumption.To effectively manage hydrogen consumption,the aim is to propose fuel cell city bus power and control system.The underlying idea is to determine the target power of fuel cell through simulation study on fuel cell and battery energy management strategy and road test verifications.A half-power prediction energy management strategy is implemented to predict the target power of the fuel cell in the current time step based on the demand power of the vehicle and the state of charge(SOC)of the battery in the previous time steps.This offers better understanding of the correlation between fuel cell power and vehicle drive cycle for enabling effective power supply management.The research results show that the half-power prediction energy management strategy effectively reduces the hydrogen consumption of the vehicle by 7.1%and the number of battery cycle by 6.0%,compared to the stepped manage-ment strategy of battery SOC.When applied to a 12-m fuel cell city bus—F12,specially designed and manufactured for the Winter Olympic Games in 2022—the fuel economy of 3.7 kg/100 km is achieved in urban road conditions.This study lays a foundation for providing the powertrain configuration and energy management strategy of fuel cell city bus.

关键词： Fuel cell city bus Energy management Half-power prediction

悬臂式掘进机镐形截齿磨损应力分布影响因素研究

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机械管理开发 2024年第1期39卷 35-37页

作者：李高鹏山西汾西矿业(集团)有限责任公司曙光煤矿山西孝义032308

为进一步探究悬臂式掘进机镐型截齿的磨损问题,以某镐型截齿为研究对象,从应力分布角度着手,分别探究齿尖锥角、截割速度和截割深度对应力分布的影响,确定该镐型截齿的最优参数组合为截齿锥角75°,截割速度2.0m/s,截割深度30mm。在此基... 详细信息

为进一步探究悬臂式掘进机镐型截齿的磨损问题,以某镐型截齿为研究对象,从应力分布角度着手,分别探究齿尖锥角、截割速度和截割深度对应力分布的影响,确定该镐型截齿的最优参数组合为截齿锥角75°,截割速度2.0m/s,截割深度30mm。在此基础上,将优化后的镐型截齿参数组合应用于实践,结果显示,截齿寿命显著提升,证明截齿磨损问题得到有效改善,表明此研究具有一定的现实意义。

关键词：悬臂式掘进机镐型截齿应力仿真分析

EBZ160掘进机行星减速器结构化力学分析

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自动化应用 2024年第5期65卷 170-172页

作者：李高鹏山西汾西矿业(集团)有限责任公司曙光煤矿山西吕梁032308

为进一步探究EBZ160型掘进机可能的优化路径,从实际案例入手,针对其因行星减速器结构而运行效率不足的问题,以轻量化的设计理念对行星减速器结构进行优化设计,明确其传动比、齿数与齿轮模数等关键参数信息,以此进行优化。而后对优化后... 详细信息

为进一步探究EBZ160型掘进机可能的优化路径,从实际案例入手,针对其因行星减速器结构而运行效率不足的问题,以轻量化的设计理念对行星减速器结构进行优化设计,明确其传动比、齿数与齿轮模数等关键参数信息,以此进行优化。而后对优化后的掘进机行星减速器结构进行有限元分析,结果显示,优化设计后的EBZ160掘进机行星减速器,不但实现了轻量化,而且完全符合在正常工况条件下对结构的强度要求,表明设计在理论上可靠安全,可进一步通过现场实验予以验证。

关键词：掘进机行星减速器力学分析仿真分析

E3 ligase FBXW7 aggravates TMPD-induced systemic lupus erythematosus by promoting cell apoptosis

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Cellular & Molecular Immunology 2018年第12期15卷 1057-1070页

作者： Zhenlu Chong Chunjing Bao Jia He Tianxiao Chen lijia Zhong gaopeng li Huanle li Lutong Fang Yinjing Song Guoxiang Fu Xuyan Yang lihua Lai Yang liu Qingqing Wang Institute of Immunology Zhejiang University School of Medicine866 Yuhangtang RoadHangzhou 310058China The Children’s Hospital Zhejiang University School of MedicineHangzhou 310006China Sir Run Shaw Hospital Zhejiang University School of MedicineHangzhou 310016China Department of Rheumatology Second Affiliated HospitalZhejiang University School of MedicineHangzhou 310009China

Systemic lupus erythematosus(SLE)is a systemic autoimmune disease,and the pathogenesis of SLE has not been fully elucidated.The E3 ubiquitin ligase FBXW7 has been well characterized in cancer as a tumor suppressor that can promote the ubiquitination and subsequent degradation of various oncoproteins;however,the potential role of FBXW7 in autoimmune diseases is unclear.In the present study,we identified that FBXW7 is a crucial exacerbating factor for SLE development and progression in a mouse model induced by 2,6,10,14-tetramethylpentadecane(TMPD).Myeloid cell-specific FBXW7-deficient(Lysm+FBXW7f/f)C57BL/6 mice showed decreased immune complex accumulation,glomerulonephritis,glomerular mesangial cell proliferation,and basemembrane thickness in the kidney.Lysm+FBXW7f/f mice produced fewer anti-Sm/RNP and anti-ANA autoantibodies and showed a decreased MHC II expression in B cells.In Lysm+FBXW7f/f mice,we observed that cell apoptosis was reduced and that fewer CD11b+Ly6Chi inflammatory monocytes were recruited to the peritoneal cavity.Consistently,diffuse pulmonary hemorrhage(DPH)was also decreased in Lysm+FBXW7f/f mice.Mechanistically,we clarified that FBXW7 promoted TMPD-induced cell apoptosis by catalyzing MCL1 degradation through K48-linked ubiquitination.Our work revealed that FBXW7 expression in myeloid cells played a crucial role in TMPD-induced SLE progression in mice,which may provide novel ideas and theoretical support for understanding the pathogenesis of SLE.

关键词： Systemic lupus erythematosus apoptosis FBXW7 MCL1 ubiquitination

低抖动大气压空气电晕均压多间隙气体火花开关

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高压电器 2024年第2期60卷 178-183页

作者：黄超闫文博易爱平李高鹏陈正阁汪由胜柴童星西北核技术研究所激光与物质相互作用国家重点实验室西安710024

为了发展结构简单、便于维护的大功率气体火花开关,研制了大气压空气电晕均压多间隙气体火花开关,该开关采用电晕放电均压方式,由9个相同的间隙构成。利用有限元分析方法对9间隙电晕均压气体火花开关的电场进行了分析,发现适合长度的电... 详细信息

为了发展结构简单、便于维护的大功率气体火花开关,研制了大气压空气电晕均压多间隙气体火花开关,该开关采用电晕放电均压方式,由9个相同的间隙构成。利用有限元分析方法对9间隙电晕均压气体火花开关的电场进行了分析,发现适合长度的电晕针对开关主间隙的电场影响很小,且加载触发脉冲时可在中间间隙形成了强烈的畸变电场。在理论分析的基础上,开展了开关击穿特性研究,实验结果表明电晕均压有利于提升开关的稳定性,开关自击穿电压分散性降低,自击穿电压略微增大;同时多间隙开关实现了良好的触发导通,在工作电压60~85 kV(工作欠压比56.8%~80%)范围内,开关的击穿延时抖动均小于20 ns,当工作电压达到80 kV以上时,抖动可小于10 ns。文中设计的大气压空气电晕均压多间隙气体火花开关可用于直线脉冲变压器等脉冲功率系统,使用的基于电场模拟对电极结构进行优化的方法对设计其他类型的开关具有借鉴意义。

关键词：脉冲功率技术多间隙气体火花开关低抖动电压均压

Microstructure design of advanced magnesium-air battery anodes

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Journal of Magnesium and Alloys 2024年第2期12卷 443-464页

作者： Xu Huang Qingwei Dai Qing Xiang Na Yang gaopeng Zhang Ao Shen Wanming li School of Metallurgy and Materials Engineering Chongqing University of Science and TechnologyChongqing 401331China School of Materials and Architectural Engineering Guizhou Normal UniversityGuiyang 550025China School of Material and Metallurgy University of Science and Technology LiaoningAnshan 114051China

Metal-air battery is an environmental friendly energy storage system with unique open structure.Magnesium(Mg)and its alloys have been extensively attempted as anodes for air batteries due to high theoretical energy density,low cost,and recyclability.However,the study on Mg-air battery(MAB)is still at the laboratory level currently,mainly owing to the low anodic efficiency caused by the poor corrosion resistance.In order to reduce corrosion losses and achieve optimal utilization efficiency of Mg anode,the design strategies are reviewed from microstructure perspectives.Firstly,the corrosion behaviors have been discussed,especially the negative difference effect derived by hydrogen evolution.Special attention is given to the effect of anode micro-structures on the MAB,which includes grain size,grain orientation,second phases,crystal structure,twins,and dislocations.For further improvement,the discharge performance,long period stacking ordered phase and its enhancing effect are considered.Meanwhile,given the current debates over Mg dendrites,the potential risk,the impact on discharge,and the elimination strategies are discussed.Microstructure control and single crystal would be promising ways for MAB anode.

关键词： Magnesium Air battery Anode Microstructure Anodic efficiency

Robust ionospheric clutter mitigation method for high frequency surface wave radar

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Science in China(Series F) 2008年第12期51卷 2087-2093页

作者： li Lei XU RongQing li gaopeng Research Institute of Electronic Engineering Harbin Institute of Technology Harbin 150001 China

This paper analyzes the characteristics of ionospheric clutter, which has proven to be the greatest impediment in high frequency surface wave radar （HFSWR）. Ionospheric clutter influences most range bins, all Doppler bins and beams, and exhibits a high directivity. A robust adaptive side-lobe cancellation algorithm based on orthogonal auxiliary beams, which use the difference beams to estimate the ionospheric clutter information, is introduced to suppress the ionospheric clutter. Training data was selected by excluding the sea clutter and probable target unit; and diagonal loading was added to enhance the robustness of the algorithm. Experimental results demonstrate that the algorithm is able to suppress the ionospheric clutter whilst preserving the desired characteristics of the target echoes and is suitable for practical implementation.

关键词： HFSWR ionospheric clutter adaptive signal processing auxiliary beam diagonal loading

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糖脂代谢紊乱与内脏脂肪面积的相关性

循证护理 2024年第12期10卷 2173-2176页

作者：包思凘潘燕飞欧阳子瑶李高鹏潘晓罗娓黄惠桥广西医科大学第二附属医院广西530007

目的:探讨内脏脂肪面积与糖脂代谢紊乱的相关性。方法:选择2021年7月—2022年7月在我院体检中心的体检人员共803人为研究对象,按各组入组标准分为正常组、高血糖组、高血脂组、高血糖合并高血脂组,收集受试者一般资料,采用人体成分分析... 详细信息

目的:探讨内脏脂肪面积与糖脂代谢紊乱的相关性。方法:选择2021年7月—2022年7月在我院体检中心的体检人员共803人为研究对象,按各组入组标准分为正常组、高血糖组、高血脂组、高血糖合并高血脂组,收集受试者一般资料,采用人体成分分析仪测量内脏脂肪面积、体脂率等,并进行血液相关生化指标检测,包括血糖、糖化血红蛋白、三酰甘油、高密度脂蛋白胆固醇和低密度脂蛋白胆固醇。结果:正常组201人,内脏脂肪面积57.70(46.15,68.95)cm^(2);高血糖组201人,内脏脂肪面积67.80(54.40,84.55)cm^(2);高血脂组201人,内脏脂肪面积97.4(78.85,118.20)cm^(2);高血糖和并高血脂组200人,内脏脂肪面积100.60(83.58,121.20)cm^(2),组间比较差异有统计学意义(P<0.01)。内脏脂肪面积与糖脂代谢紊乱呈正相关,内脏脂肪面积与糖脂代谢紊乱相关系数为0.380,P<0.01(其中4组的OR值分别是1.033,1.063,1.089,P均<0.01)。体脂百分比、体质指数、低密度脂蛋白胆固醇、年龄、性别、总胆固醇、空腹血糖、餐后血糖为内脏脂肪面积的影响因素(P<0.01)。结论:内脏脂肪面积相较于体脂率更能说明糖脂代谢紊乱,内脏脂肪面积可作为糖脂代谢紊乱的预测指标。

关键词：内脏脂肪面积糖脂代谢影响因素预测指标护理

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Identifying malicious traffic under concept drift based on intraclass consistency enhanced variational autoencoder

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Science China(Information Sciences) 2024年

作者： Xiang LUO Chang liU gaopeng GOU Gang XIONG Zhen li Binxing FANG Institute of Information Engineering Chinese Academy of Sciences School of Cyber Security University of Chinese Academy of Sciences School of Computer Science and Technology Harbin Institute of Technology (Shenzhen)

Accurate identification of malicious traffic is crucial for implementing effective defense countermeasures and has led to extensive research efforts.However,the continuously evolving techniques employed by adversaries have introduced the issues of concept drift,which significantly affects the performance of existing methods.To tackle this challenge,some researchers have focused on improving the separability of malicious traffic representation and designing drift detectors to reduce the number of false positives.Nevertheless,these methods often overlook the importance of enhancing the generalization and intraclass consistency in the representation.Additionally,the detectors are not sufficiently sensitive to the variations among different malicious traffic classes,which results in poor performance and limited robustness.In this paper,we propose intraclass consistency enhanced variational autoencoder with Class-Perception detector(ICE-CP) to identify malicious traffic under concept drift.It comprises two key modules during training:intraclass consistency enhanced (ICE) representation learning and Class-Perception (CP) detector construction.In the first module,we employ a variational autoencoder (VAE) in conjunction with Kullback-Leibler(KL)-divergence and cross-entropy loss to model the distribution of each input malicious traffic flow.This approach simultaneously enhances the generalization,interclass consistency,and intraclass differences in the learned representation.Consequently,we obtain a compact representation and a trained classifier for nondrifting malicious traffic.In the second module,we design the CP detector,which generates a centroid and threshold for each malicious traffic class separately based on the learned representation,depicting the boundaries between drifting and non-drifting malicious traffic.During testing,we utilize the trained classifier to predict malicious traffic classes for the testing samples.Then,we use the CP detector to detect the potential drifting samples using the centroid and th

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