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纯电动客车荷电状态低故障预测

福建工程学院学报 2020年第4期18卷 353-357页

作者：方卫东陈汉林陈子标福建工程学院信息科学与工程学院福建福州350118

针对纯电动客车荷电状态(SOC)低故障预测问题,在分析其开始充电SOC序列的周期性波动规律及变化趋势的基础上,构建差分自回归滑动平均模型(ARIMA)进行车辆SOC的短期预测,最后比较预测结果与故障阈值以判断是否发生故障。以某车企的纯电... 详细信息

针对纯电动客车荷电状态(SOC)低故障预测问题,在分析其开始充电SOC序列的周期性波动规律及变化趋势的基础上,构建差分自回归滑动平均模型(ARIMA)进行车辆SOC的短期预测,最后比较预测结果与故障阈值以判断是否发生故障。以某车企的纯电动客车为例进行实证分析,研究结果表明:差分自回归滑动平均模型的故障预测真阳率为96.4%,误诊率为10.3%,说明方法具有良好的预测可行性。

关键词： SOC低故障预测 ARIMA 纯电动客车

考虑双联行星齿轮轴扭转变形的拓扑修形方法研究

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机械传动 2023年第2期47卷 8-14页

作者：陈雪辉蒲明春高婷张旭东房卫东李昊刘伟安徽建筑大学机械与电气工程学院安徽合肥230601 郑州机械研究所有限公司河南郑州450000 合肥波林新材料股份有限公司安徽合肥230601

针对双联行星齿轮轴在载荷作用下产生扭转变形造成行星轮系偏载、轮齿啮合冲击大等问题,提出了考虑双联行星齿轮轴扭转变形的拓扑修形方法。分析了双联行星齿轮轴扭转变形成因及其对轮系均载性能的影响,基于多体齿轮承载接触分析(PLTCA... 详细信息

针对双联行星齿轮轴在载荷作用下产生扭转变形造成行星轮系偏载、轮齿啮合冲击大等问题,提出了考虑双联行星齿轮轴扭转变形的拓扑修形方法。分析了双联行星齿轮轴扭转变形成因及其对轮系均载性能的影响,基于多体齿轮承载接触分析(PLTCA)、齿轮承载接触分析(LTCA)求解了变形下的承载传动误差与齿面载荷分配系数;利用优化智能算法求解了齿面最大修形量条件下的修形参数最优解;对所提方法进行仿真验证。结果表明,本方法能有效降低齿面单位长度载荷与传动误差幅值,一级、二级行星轮齿面单位长度载荷分别下降33.58%、21.35%,传动误差幅值下降77.74%;在减速器载荷试验台上进行实验验证,实验结果与仿真结果一致;各行星轮齿面的磨损情况均大幅改善,较好地解决了NGWN型行星轮系偏载问题,提高了设备传动精度与使用寿命。

关键词：双联行星轮扭转变形传动误差三维形貌 PLTCA

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INDIRECT ACCELERATED ADAPTIVE FUZZY CONTROLLER

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Chinese Journal of Mechanical Engineering 2008年第1期21卷 91-93页

作者： ZHU Liye fang Yuan ZHANG weidong Baosteel Research Institute Shanghai 201900 China Department of Automation Shanghai Jiaotong University Shanghai 200240 China

According to a type of normal nonlinear system, an indirect adaptive fuzzy （IAF） controller has been applied to those systems where no accurate mathematical models of the systems under control are available. To satisfy with system performance, an indirect accelerated adaptive fuzzy （IAAF） controller is proposed, and its general form is presented. The general form IAAF controller ensures necessary control criteria and system＇s global stability using Lyapunov Theorem. It has been proved that the close-loop system error converges to a small neighborhood of equilibrium point. The optimal IAAF controller is derived to guarantee the process＇s shortest settling time. Simulation results indicate the IAAF controller make the system more stable, accurate, and fast.

关键词： Indirect adaptive fuzzy controller Accelerated controller Stability System error Settling time

Preparation and applications of calcium ferrite as a functional material:A review

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 292-310页

作者： Xiuli Han Bowen Duan Lei Liu Shilong fang Weiwei Wang College of Mining Engineering North China University of Science and TechnologyTangshan 063210China Collaborative Innovation Center of Green Development and Ecological Restoration of Mineral Resources of Hebei Province Tangshan 063210China Key Laboratory of Mining Development and Security Technology of Hebei Province Tangshan 063210China

Calcium ferrite(CF)is recognized as a potential green and efficient functional material because of its advantages of magnetism,electrochemistry,catalysis,and biocompatibility in the fields of materials chemistry,environmental engineering,and ***-fore,the obtained research results need to be systematically summarized,and new perspectives on CF and its composite materials need to be *** on the presented studies of CF and its composite materials,the types and structures of the crystal are *** addition,the current application technologies and theoretical mechanisms with various properties in different fields are ***,the various preparation methods of CF and its composite materials are elaborated in *** importantly,the advantages and disadvantages of the synthesis methods of CF and its composite materials are discussed,and the existing problems and emerging challenges in practical production are ***,the key future research directions of CF and its composite materials have been prospected from the potential application technologies to provide references for its synthesis and efficient utilization.

关键词： calcium ferrite mineral functional materials preparation application perspectives

Treadmill exercise in combination with acousto-optic and olfactory stimulation improves cognitive function in APP/PS1 mice through the brain-derived neurotrophic factor-and Cygb-associated signaling pathways

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Neural Regeneration Research 2025年第9期20卷 2706-2726页

作者： Biao Xiao Chaoyang Chu Zhicheng Lin Tianyuan fang Yuyu Zhou Chuxia Zhang Jianghui Shan Shiyu Chen Liping Li Department of Physiology and Pharmacology Health Science CenterNingbo UniversityNingboZhejiang ProvinceChina Ningbo Key Laboratory of Behavioral Neuroscience Health Science CenterNingbo UniversityNingboZhejiang ProvinceChina Key Laboratory of Addiction Research of Zhejiang Province NingboZhejiang ProvinceChina

A reduction in adult neurogenesis is associated with behavioral abnormalities in patients with Alzheimer's ***,enhancing adult neurogenesis represents a promising therapeutic approach for mitigating disease symptoms and ***,nonpharmacological interventions aimed at inducing adult neurogenesis are currently *** individual non-pharmacological interventions,such as aerobic exercise,acousto-optic stimulation,and olfactory stimulation,have shown limited capacity to improve neurogenesis and cognitive function in patients with Alzheimer's disease,the therapeutic effect of a strategy that combines these interventions has not been fully *** this study,we observed an age-dependent decrease in adult neurogenesis and a concurrent increase in amyloid-beta accumulation in the hippocampus of amyloid precursor protein/presenilin 1 mice aged 2-8 *** deposition became evident at 4 months,while neurogenesis declined by 6 months,further deteriorating as the disease ***,following a 4-week multifactor stimulation protocol,which encompassed treadmill running(46 min/d,10 m/min,6 days per week),40 Hz acousto-optic stimulation(1 hour/day,6 days/week),and olfactory stimulation(1 hour/day,6 days/week),we found a significant increase in the number of newborn cells(5'-bromo-2'-deoxyuridine-positive cells),immature neurons(doublecortin-positive cells),newborn immature neurons(5'-bromo-2'-deoxyuridine-positive/doublecortin-positive cells),and newborn astrocytes(5'-bromo-2'-deoxyuridine-positive/glial fibrillary acidic protein-positive cells).Additionally,the amyloid-beta load in the hippocampus *** findings suggest that multifactor stimulation can enhance adult hippocampal neurogenesis and mitigate amyloid-beta neuropathology in amyloid precursor protein/presenilin 1 ***,cognitive abilities were improved,and depressive symptoms were alleviated in amyloid precursor protein/presenilin 1 mice

关键词： acousto-optic stimulation adult neurogenesis Alzheimer's disease amyloid precursor protein/presenilin 1 mice amyloid-beta deposition brain cell apoptosis cognitive impairment depression-like behavior involuntary treadmill exercise olfactory stimulation serum metabolites

THE SPECTRAL RADIUS OF UNIFORM HYPERGRAPH DETERMINED BY THE SIGNLESS LAPLACIAN MATRIX

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数学杂志 2025年第1期45卷 1-12页

作者： HE fang-guo College of Mathematics and Statistics Huanggang Normal UniversityHuBei 438000

This paper studies the problem of the spectral radius of the uniform hypergraph determined by the signless Laplacian *** upper bound of the spectral radius of a uniform hypergraph is obtained by using Rayleigh principle and the perturbation of the spectral radius under moving the edge operation,and the extremal hypergraphs are characterized for both supertree and unicyclic *** spectral radius of the graph is generalized.

关键词： spectral radius uniform hypergraph Signless Laplasian matrix

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基于轮齿修形的减速器减振降噪研究

陕西理工大学学报（自然科学版） 2024年第4期40卷 1-8页

作者：黄磊郝帅高婷朱祥房卫东邓俊安徽建筑大学机械与电气工程学院安徽合肥230601 高端装备关键摩擦副安徽省重点实验室安徽合肥230601 合肥波林新材料股份有限公司安徽合肥230601

针对某减速器内部激励引起的振动噪声问题,通过Romax Designer软件建立了刚柔耦合动力学模型;对双联齿轮减速器运用遗传算法进行齿轮修形最优值求解,把求解最优值修形参数代入模型中进行接触分析,以降低传动误差。对比优化前后仿真结果... 详细信息

针对某减速器内部激励引起的振动噪声问题,通过Romax Designer软件建立了刚柔耦合动力学模型;对双联齿轮减速器运用遗传算法进行齿轮修形最优值求解,把求解最优值修形参数代入模型中进行接触分析,以降低传动误差。对比优化前后仿真结果发现,传动误差值、最大接触应力、单位长度载荷分布与峰值、轮齿齿根冯氏应力、模态柔度、能量、表面加速度以及声压值均发生了不同程度的降低,有效地降低了传动系统内部激励引起的振动噪声,提高了系统的寿命和传动的平稳性。

关键词：遗传算法传动误差模态柔度能量减振降噪

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无线传感器网络安全多径路由协议研究

计算机应用与软件 2016年第11期33卷 263-268页

作者：邓斌石志东房卫东吴伊蒙单联海上海大学特种光纤与光接入网省部共建重点实验室上海201899 中国科学院上海微系统与信息技术研究所无线传感网与通信重点实验室上海200051 上海物联网有限公司上海201899 上海无线通信研究中心上海200335

由于无线传感器网络WSNs自身特性及部署环境特点,其安全面临巨大挑战。另一方面,路由协议设计关注于传输效率与能量消耗,信息安全没有引起足够的重视,易遭受多种攻击。安全多径路由协议是一种保证WSNs安全的重要技术,研究近年来WSNs安... 详细信息

由于无线传感器网络WSNs自身特性及部署环境特点,其安全面临巨大挑战。另一方面,路由协议设计关注于传输效率与能量消耗,信息安全没有引起足够的重视,易遭受多种攻击。安全多径路由协议是一种保证WSNs安全的重要技术,研究近年来WSNs安全多径路由协议,根据协议攻击防御的特性,把安全多径路由协议分为三类,并对每类典型协议安全技术进行分析,最后指出安全多径路由协议未来研究方向。

关键词： WSNs 路由协议多径路由安全

Damage Initiation and Propagation in Composites Subjected to Low-Velocity Impact:Experimental Results,3D Dynamic Damage Model,and FEM Simulations

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Transactions of Nanjing University of Aeronautics and Astronautics 2019年第3期36卷 488-499页

作者： JIA Wenbin WEN weidong fang Lei Jiangsu Province Key Laboratory of Aerospace Power System College of Energy and Power EngineeringNanjing University of Aeronautics and Astronautics

A three-dimensional dynamic damage model that fits both small and large damage sizes is developed to predict impact damage initiation and propagation for each lamina of T300-carbon/epoxy ***,13 specimens of the same lamination sequence are subjected to three different impact energies(10 J,15 J,and 20 J).After the impact,the laminates are inspected by the naked eye to observe the damage in the outer layers,and subsequently X-rayed to detect the inner ***,the stress analysis of laminates subjected to impact loading is presented,based on the Hertz contact law and virtual displacement *** on the analysis results,a three-dimensional dynamic damage model is proposed,including the Hou failure criteria and Camanho stiffness degradation model,to predict the impact damage shape and *** numerical predictions of the damage shape and area show a relatively reasonable agreement with the ***,the impact damage initiation and propagation for each lamina are investigated using this damage model,and the results improve the understanding of the impact process.

关键词： composites impact three-dimensional dynamic damage model impact damage initiation and propagation