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Torsional vibration suppression and electromechanical coupling characteristics of electric drive system considering misalignment

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Applied Mathematics and Mechanics(English Edition) 2024年第11期45卷 1987-2010页

作者： Jinxin DOU Zhenping LI hongliang yao Muchuan DING Guochong WEI School of Mechanical Engineering and Automation Northeastern UniversityShenyang110819China China North Vehicle Research Institute Beijing100072China

The torque ripples resulting from external electromagnetic excitation and mechanical internal excitation contribute to significant torsional vibration issues within electromechanical coupling *** mitigate these fluctuations,a passive control strategy centered around a multi-stable nonlinear energy sink(MNES)is ***,models for electromagnetic torque,gear nonlinear meshing torque,and misalignment torque are *** upon this foundation,an electromechanical coupling dynamic model of the electric drive system is *** analysis is conducted to determine the sensitive nodes of each mode and to provide guidance for the installation of the *** structure of the MNES is introduced,and an electromechanical coupling dynamic model with the MNES is *** on this model,the influence of the misaligned angle on the electromechanical coupling characteristics is *** addition,the vibration suppression performance of the MNES is studied under both speed and uniform speed ***,experimental testing is conducted to verify the vibration suppression performance of the *** results indicate that misalignment triggers the emergence of its characteristic frequencies and associated ***,the MNES effectively mitigates the torsional vibrations in the coupled system,demonstrating suppression rates of 52.69%in simulations and 63.3%in experiments.

关键词： electric drive system electromechanical coupling nonlinear energy sink(NES) misalignment

The LncRNA FEZF1-AS1 promotes tumor proliferation in colon cancer by regulating the mitochondrial protein PCK2

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Oncology Research 2021年第3期29卷 201-215页

作者： HUAMIN WANG YANTING WU ZHENLEI WANG YUHANG CHEN JINYU MO WEN GUAN YALI ZHANG hongliang yao Guangdong Key Laboratory of Animal Conservation and Resource Utilization Guangdong Public Laboratory of Wild Animal Conservation and UtilizationInstitute of ZoologyGuangdong Academy of SciencesGuangzhou510260China Department of general surgery The Affiliated Cancer Hospital of Zhengzhou UniversityHenan Cancer HospitalZhengzhou450008China

LncRNAs and metabolism represents two factors involved in cancer initiation and ***,the interaction between lncRNAs and metabolism remains to be fully *** this study,lncRNA FEZF1-AS1(FEZF1-AS1)was found upregulated in colon cancer after screening all the lncRNAs of colon cancer tissues deposited in TCGA,the result of which was further confirmed by RNAscope staining on a colon tissue *** results obtained using FEZF1-AS1 knockout colon cancer cells(SW480 KO and HCT-116 KO)constructed using CRISPR/Cas9 system confirmed the proliferation,invasion,and migration-promoting function of FEZF1-AS1 in ***,FEZF1-AS1 associated with the mitochondrial protein phosphoenolpyruvate carboxykinase(PCK2),which plays an essential role in regulating energy metabolism in the *** of FEZF1-AS1 greatly decreased PCK2 protein levels,broke the homeostasis of energy metabolism in the mitochondria,and inhibited proliferation,invasion,and migration of SW480 and HCT-116 ***2 overexpression in FEZF1-AS1 knockout cells partially rescued the tumor inhibitory effect on colon cancer cells both in vitro and in ***,PCK2 overexpression specifically rescued the abnormal accumulation of Flavin mononucleotide(FMN)and succinate,both of which play an important role in oxidative phosphorylation(OXPHOS).Overall,these results indicate that FEZF1-AS1 is an oncogene through regulating energy metabolism of the *** research reveals a new mechanism for lncRNAs to regulate colon cancer and provides a potential target for colon cancer diagnosis and treatment.

关键词： Long non-coding RNA(LncRNA) Colon cancer Phosphoenolpyruvate carboxykinase2(PCK2) Tricarboxylic acid cycle(TCA) Glycolysis Oxidative phosphorylation(OXPHOS)

Extraction and Purification Process Optimization and Antioxidant Activity in vitro of Flavonoids in Amaranthus caudatus L.

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Medicinal Plant 2020年第4期11卷 48-53页

作者： hongliang yao Huihui LI Department of Food Science School of Animal Science Jinling Institute of Technology Nanjing 210038 China

[Objectives]To explore the optimal extraction and purification process of the flavonoids in Amaranthus caudatus *** to study the antioxidant activity in vitro of the flavonoids in ***.[Methods]Taking *** as the raw material,flavonoids were extracted by alcohol extraction method,and AB-8 macroporous adsorption resin was selected for *** hydroxyl radical scavenging ability,DPPH radical scavenging ability,and O^2-radical scavenging ability were used as evaluation indicators,to explore the antioxidant activity in vitro of the flavonoids in ***.[Results]The optimal extraction process conditions of flavonoids in *** are:liquid-to-material ratio 40:1,extraction temperature 60℃,ethanol concentration 60%,ultrasonic power 320 W,extraction time 50 *** these conditions,the extraction yield of flavonoids in *** is(1.35±0.01)%.The optimal purification process conditions of flavonoids in *** are 2.5 g AB-8 macroporous adsorption resin,sample volume 5 mL,mass concentration of adsorption solution 1.60 mg/mL,pH value of adsorption solution 3.0,sample flow rate 3 BV/h,ethanol concentration in desorption process is 70%and the desorption flow rate is 3 BV/*** these conditions,the recovery rate reaches 88.35%±0.68%.[Conclusions]*** has a high content of flavonoids and has excellent free radical scavenging ability in *** study is intended to provide important technical support for the research of flavonoid activity of *** and the development of functional products.

关键词： Amaranthus caudatus L. Flavonoids Ultrasound-assisted extraction Purification Antioxidant activity

日本农业女性的就业结构变化及其家庭经济管理

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农业经济问题 2000年第2期21卷 61-63页

作者：姚洪亮日本鹿儿岛大学

近几年,在日本农业经济领域出现一种新现象,即农业男性劳动力大量流向城市,去从事其他产业,而农业女性劳动力却真正承担起发展农业生产的重任,成为农业家庭经济的管理者.

关键词：日本农业女性劳动力就业结构家庭经济管理

Asymptotic Direct System of C^(*)-algebras and Locally AF-algebra

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数学进展 2024年第5期53卷 1084-1092页

作者： XIE Zhentao yao hongliang WANG Hao School of Mathematics and Statistics Nanjing University of Science and TechnologyNanjingJiangsu210094P.R.China

We define the direct limit of the asymptotic direct system of C^(*)-algebras and give some properties of ***,we prove that a C^(*)-algebra is a locally AF-algebra,if and only if it is the direct limit of an asymptotic... 详细信息

关键词： C^(*)-algebra asymptotic direct system direct limit locally AF-algebra

反复力竭游泳应激对大鼠海马结构神经元型一氧化氮合酶表达的影响

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首都体育学院学报 2010年第6期22卷 93-96页

作者：药宏亮中北大学生理学实验室山西太原030051

为探讨海马结构(海马和齿状回)神经元型一氧化氮合酶(nNOS)与运动疲劳应激的关系,观察反复力竭游泳所引起的疲劳应激对大鼠海马结构nNOS表达的影响。经4周力竭游泳训练制成大鼠运动疲劳应激模型,用免疫组织化学方法显示海马和齿状回nNO... 详细信息

为探讨海马结构(海马和齿状回)神经元型一氧化氮合酶(nNOS)与运动疲劳应激的关系,观察反复力竭游泳所引起的疲劳应激对大鼠海马结构nNOS表达的影响。经4周力竭游泳训练制成大鼠运动疲劳应激模型,用免疫组织化学方法显示海马和齿状回nNOS阳性神经元,用图像处理半定量方法对该神经元的数量、面积和灰度进行测量和分析。结果显示:应激实验组大鼠海马和齿状回nNOS免疫阳性神经元数量、面积和灰度均明显大于对照组(P<0.05,P<0.01,P<0.001)。运动疲劳应激可使大鼠海马结构神经元nNOS上调,该神经元参与运动疲劳应激的形成,其机理可能与海马对情绪记忆和齿状回对应激反应的心理行为调节以及NO的神经毒性有关。

关键词：疲劳应激海马结构神经元型一氧化氮合酶(nNOs) 大鼠

基于深度金字塔网络的Pan-Sharpening算法

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计算机辅助设计与图形学学报 2019年第10期31卷 1831-1837页

作者：方帅方赛华姚宏亮合肥工业大学计算机与信息学院合肥230009 工业安全与应急技术安徽省重点实验室合肥230009

为了利用高空间分辨率单波段的全色(PAN)图像和低空间分辨率的多光谱图像(MS)生成高分辨率的多光谱图像,提出一种基于深度金字塔网络的遥感图像融合(即pan-sharpening)算法,通过图像金字塔的方式逐层上采样来重构高分辨率的多光谱图像.... 详细信息

为了利用高空间分辨率单波段的全色(PAN)图像和低空间分辨率的多光谱图像(MS)生成高分辨率的多光谱图像,提出一种基于深度金字塔网络的遥感图像融合(即pan-sharpening)算法,通过图像金字塔的方式逐层上采样来重构高分辨率的多光谱图像.在细节保持方面,针对全色图像和多光谱图像在尺度上跨度过大的问题,采用深度金字塔网络多尺度地融合全色图像的细节信息;在光谱保持方面,使用反卷积层代替传统的超分辨算法来上采样低分率的多光谱图像;最后将这2部分相加,得到最终的融合图像. GeoEye-1数据集上的实验结果表明,文中算法综合性能优于BDSD, PRACS, PNN and PanNet算法.

关键词：卷积神经网络图像金字塔 pan-sharpening 超分辨率

IHB法在多自由度Bouc-Wen滞回非线性系统响应特性研究中的应用

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振动与冲击 2018年第10期37卷 57-62,93页

作者：赵倩刘子良姚红良闻邦椿上海理工大学机械工程学院上海200093 东北大学机械工程与自动化学院沈阳110819

工程中常用Bouc-Wen模型来描述具有滞回特性的振动系统,此类系统是一种多值性的非解析系统,其动力学理论分析比较困难。由于Bouc-Wen滞回模型的微分形式,一般采用数值方法进行积分求解,但对于多自由度系统来说求解速度非常慢,且难以求... 详细信息

工程中常用Bouc-Wen模型来描述具有滞回特性的振动系统,此类系统是一种多值性的非解析系统,其动力学理论分析比较困难。由于Bouc-Wen滞回模型的微分形式,一般采用数值方法进行积分求解,但对于多自由度系统来说求解速度非常慢,且难以求得不稳定解。故提出将滞回力引入为一个增加的自由度,重新建立振动系统的微分方程,将增量谐波平衡(IHB)法推广至求解该类含Bouc-Wen模型的多自由度滞回非线性系统,并引入弧长法解决由迟滞非线性引起的跳跃和多映射现象。利用该法分析了一些滞回系统的响应特性,通过与数值方法进行精度和效率对比,体现了该方法的优越性。

关键词：滞回非线性 Bouc-Wen模型悬臂梁增量谐波平衡法弧长法

膜片联轴器对转子系统动态特性的影响研究分析

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机械强度 2006年第3期28卷 322-326页

作者：李小彭姚红良孙伟闻邦椿东北大学机械工程与自动化学院沈阳110004

用有限元分析膜片联轴器联接转子系统的振动特性与发生裂纹、碰摩故障时的动态特性与响应。利用各单跨转子临界转速与转子系统临界转速的比较分析,研究膜片联轴器对转子系统弯曲振动、弯扭耦合振动的影响,以及转子发生裂纹、碰摩故障时... 详细信息

用有限元分析膜片联轴器联接转子系统的振动特性与发生裂纹、碰摩故障时的动态特性与响应。利用各单跨转子临界转速与转子系统临界转速的比较分析,研究膜片联轴器对转子系统弯曲振动、弯扭耦合振动的影响,以及转子发生裂纹、碰摩故障时膜片联轴器的影响,并提出膜片联轴器在机器故障诊断与维护中的有利作用。

关键词：膜片联轴器动态特性裂纹碰摩耦合振动