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一类Holder型非线性系统局部有限时间稳定性研究

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湖南城市学院学报（自然科学版） 2024年第2期33卷 75-78页

作者：代安定陈程刘思琳湖南城市学院理学院湖南益阳413000

本文对具有Holder型条件的非线性系统的局部有限时间稳定性问题进行了研究。首先,基于Lyapunov稳定性理论,提出Holder型非线性系统实现稳定的充分性新条件,并估计了系统稳定的区域;其次,采用自适应控制方法,提出了保证Holder型非线性系... 详细信息

本文对具有Holder型条件的非线性系统的局部有限时间稳定性问题进行了研究。首先,基于Lyapunov稳定性理论,提出Holder型非线性系统实现稳定的充分性新条件,并估计了系统稳定的区域;其次,采用自适应控制方法,提出了保证Holder型非线性系统的有限时间镇定条件,并设计了相关参数的自适应控制律;最后,通过算例表明了理论结果的正确性。

关键词：非线性系统稳定性有限时间自适应控制

Exponential synchronization of stochastic complex dynamical networks with impulsive perturbations and Markovian switching

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Exponential synchronization of stochastic complex dynamical ...

Multiple factors to assist human-derived induced pluripotent stem cells to efficiently differentiate into midbrain dopaminergic neurons

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作者： anding dai Wuneng Zhou Yichao Zheng Shengchao Su College of Information Science and Technology Donghua University Laboratory of Robotics and Intelligent Control Shanghai University of Engineering Science

ISBN: (纸本)9781479937097

This paper investigates the exponential synchronization problem of stochastic complex dynamical networks with impulsive perturbations and Markovian switching. The complex dynamical networks consists of ? modes and the networks switch from one mode to another according to a Markovian chain with known transition probability. Basing on the Lyapunov functional method and stochastic analysis, by employing ?-matrix approach, some sufficiency conditions are presented to ensure the exponential synchronization of stochastic complex dynamical networks with impulsive perturbations and Markovian switching, and the upper bound of impulsive gain is evaluated. At the end of this paper, a numerical examples are included to show the effectiveness of our results.

关键词： Exponential synchronization Complex dynamical network Markovian switching Impulsive perturbation

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Neural Regeneration Research 2024年第4期19卷 908-914页

作者： Yalan Chen Junxin Kuang Yimei Niu Hongyao Zhu Xiaoxia Chen Kwok-Fai So anding Xu Lingling Shi Guangdong-Hong Kong-Macao Institute of CNS Regeneration Ministry of Education CNS Regeneration Collaborative Joint LaboratoryJinan University Department of Neurology and Stroke Center The First Affiliated HospitalJinan University Department of Psychiatry The First Affiliated HospitalJinan University Co-innovation Center of Neuroregeneration Nantong University

Midbrain dopaminergic neurons play an important role in the etiology of neurodevelopmental and neurodegenerative *** also represent a potential source of transplanted cells for therapeutic *** vitro differentiation of functional midbrain dopaminergic neurons provides an accessible platform to study midbrain neuronal dysfunction and can be used to examine obstacles to dopaminergic neuronal *** evidence and impressive advances in human induced pluripotent stem cells,with tuned neural induction and differentiation protocols,makes the production of induced pluripotent stem cell-derived dopaminergic neurons *** SB431542 and dorsomorphin dual inhibitor in an induced pluripotent stem cell-derived neural induction protocol,we obtained multiple subtypes of neurons,including 20%tyrosine hydroxylase-positive dopaminergic *** obtain more dopaminergic neurons,we next added sonic hedgehog(SHH)and fibroblast growth factor 8(FGF8)on day 8 of *** increased the proportion of dopaminergic neurons,up to 75%tyrosine hydroxylase-positive neurons,with 15%tyrosine hydroxylase and forkhead box protein A2(FOXA2)co-expressing *** further optimized the induction protocol by applying the small molecule inhibitor,CHIR99021(CHIR).This helped facilitate the generation of midbrain dopaminergic neurons,and we obtained 31-74%midbrain dopaminergic neurons based on tyrosine hydroxylase and FOXA2 ***,we have established three induction protocols for dopaminergic *** on tyrosine hydroxylase and FOXA2 immunostaining analysis,the CHIR,SHH,and FGF8 combined protocol produces a much higher proportion of midbrain dopaminergic neurons,which could be an ideal resource for tackling midbrain-related diseases.

关键词： dopaminergic neurons FGF signal induced pluripotent stem cells midbrain neural differentiation SHH signal SMAD signal WNT signal

Increased retinal venule diameter as a prognostic indicator for recurrent cerebrovascular events:a prospective observational study

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Neural Regeneration Research 2024年第5期19卷 1156-1160页

作者： Ying Zhao Dawei Dong Ding Yan Bing Yang Weirong Gui Man Ke anding Xu Zefeng Tan Department of Neurology and Stroke Center the First Affiliated Hospital of Jinan UniversityGuangzhouGuangdong ProvinceChina Clinical Neuroscience Institute the First Affiliated Hospital of Jinan UniversityGuangzhouGuangdong ProvinceChina Department of Neurology the First People’s Hospital of FoshanFoshanGuangdong ProvinceChina

Microvasculature of the retina is considered an alternative marker of cerebral vascular risk in healthy ***,the ability of retinal vasculature changes,specifically focusing on retinal vessel diameter,to predict the recurrence of cerebrovascular events in patients with ischemic stroke has not been determined *** previous studies have shown a link between retinal vessel diameter and recurrent cerebrovascular events,they have not incorporated this information into a predictive ***,this study aimed to investigate the relationship between retinal vessel diameter and subsequent cerebrovascular events in patients with acute ischemic ***,we sought to establish a predictive model by combining retinal veessel diameter with traditional risk *** performed a prospective observational study of 141 patients with acute ischemic stroke who were admitted to the First Affiliated Hospital of Jinan *** of these patients underwent digital retinal imaging within 72 hours of admission and were followed up for 3 *** found that,after adjusting for related risk factors,patients with acute ischemic stroke with mean arteriolar diameter within 0.5-1.0 disc diameters of the disc margin(MAD_(0.5-1.0DD))of≥74.14μm and mean venular diameter within 0.5-1.0 disc diameters of the disc margin(MVD_(0.5-1.0DD))of≥83.91μm tended to experience recurrent cerebrovascular *** established three multivariate Cox proportional hazard regression models:model 1 included traditional risk factors,model 2 added MAD_(0.5-1.0DD)to model 1,and model 3 added MVD0.5-1.0DD to model *** 3 had the greatest potential to predict subsequent cerebrovascular events,followed by model 2,and finally model *** findings indicate that combining retinal venular or arteriolar diameter with traditional risk factors could improve the prediction of recurrent cerebrovascular events in patients with acute ischemic stroke,and that retinal imaging c

关键词： acute ischemic stroke arteriolar cerebrovascular events diameter digital retinal imaging microvasculature prediction recurrent retina venular

Physiological Response Mechanism and Drought Resistance Evaluation of Passiflora edulis Sims under Drought Stress

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Phyton-International Journal of Experimental Botany 2024年第6期93卷 1345-1363页

作者： Binyang Zhao Fengchan Wu Guojun Cai Peiyu Xi Yulin Guo anding Li College of Forestry Guizhou UniversityGuiyang550025China Guizhou Institute of Biology Guizhou Academy of SciencesGuiyang550009China College of Resources and Environment Hunan Agricultural UniversityChangsha410128China

In order to explore the response mechanism of Passiﬂora edulis Sims to drought stress,the changes in morpho-logical and physiological traits of Passiﬂora edulis Sims under different drought conditions were studied.A total of 7 germplasm resources of Passiﬂora edulis Sims were selected and tested under drought stress by the pot culture method under 4 treatment levels:75%–80%(Control,CK)of maximumﬁeld water capacity,55%–60%(Light Drought,LD)of maximumﬁeld water capacity,i.e.,mild drought,40%–45%(Moderate Drought,MD)of max-imumﬁeld water capacity,i.e.,moderate drought and 30%–35%(Severe Drought,SD)of maximumﬁeld water capacity,i.e.,severe *** the 40th day of drought treatment,13 indices,including seedling growth mor-phology,physiology,and biochemistry,were *** results showed that under drought stress,the height and ground diameter of *** Sims gradually decreased with increasing drought stress,and there were signiﬁ-cant differences in seedling height and ground diameter among the *** stress signiﬁcantly inhib-ited the growth of seven *** Sims *** contents of soluble sugar(SS),soluble protein(SP),proline(Pro),and other substances in *** Sims basically increased with increasing drought *** the aggrava-tion of drought stress,the malondialdehyde(MDA)content of *** Sims tended to increase to different degrees,the superoxide dismutase(SOD)activity and peroxidase(POD)activity both tended to increase atﬁrst and then decrease,and the change in catalase(CAT)activity mostly showed a gradual increasing *** con-tents of endogenous hormones in *** Sims signiﬁcantly differed under different degrees of drought *** the aggravation of drought stress,the abscisic acid(ABA)content of *** Sims tended to increase,whereas the contents of gibberellin(GA),indoleacetic acid(IAA),and zeatin nucleoside(ZR)exhibited a down-ward trend.A comprehensive evaluation of the drought resistance of seven *** Sim

关键词： Drought resistance water stress phytohormone morphological trait physiological traits

红色文化育人背景下新文科专业课程思政建设的路径探究

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文化创新比较研究 2021年第27期5卷 165-168页

作者：彭凤姣代安定湖南城市学院湖南益阳413000

文科专业课程思政就是在文科专业课程中融入思想政治教育,它是“新文科”建设中专业融合、课程创新的重要内容。在应对意识形态领域面临的各种风险挑战、教育要落实立德树人的根本任务、思政工作要破解“孤岛现象”的时代背景下,文科专... 详细信息

文科专业课程思政就是在文科专业课程中融入思想政治教育,它是“新文科”建设中专业融合、课程创新的重要内容。在应对意识形态领域面临的各种风险挑战、教育要落实立德树人的根本任务、思政工作要破解“孤岛现象”的时代背景下,文科专业课程思政面临着教师课程思政意识不强、能力不足,专业课程思政元素挖掘不充分、系统性不强,专业教育与思政教育融合度不高的现实困境。因此,结合红色文化提高教师课程思政的意识和能力,系统挖掘专业课程蕴含的红色文化基因,促进专业教育与课程思政有效融合是破解新文科背景下文科专业课程思政现实困境的有效途径。

关键词：新文科红色文化文科专业课程思政

具有参数切换的随机中立型神经网络自适应指数同步

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湖南城市学院学报（自然科学版） 2020年第3期29卷 47-51页

作者：代安定叶雨辰杨建光湖南城市学院理学院湖南益阳413000

研究具有马氏切换参数的随机中立型神经网络的同步问题。基于Lyapunov稳定性理论、随机分析和自适应控制方法,在时滞是有界可测的前提下,提出了2个能保证中立型神经网络实现同步的时滞依赖充分性判据;同时,设计了依Markovian跳变的自适... 详细信息

研究具有马氏切换参数的随机中立型神经网络的同步问题。基于Lyapunov稳定性理论、随机分析和自适应控制方法,在时滞是有界可测的前提下,提出了2个能保证中立型神经网络实现同步的时滞依赖充分性判据;同时,设计了依Markovian跳变的自适应更新律;最后通过算例证明了该理论的正确性。

关键词：神经网络同步马尔科夫切换噪声干扰

滑模控制实现受噪声干扰超混沌Lorenz-Stenflo系统的同步

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三峡大学学报（自然科学版） 2011年第1期33卷 99-102页

作者：丰建文代安定徐晨孙少辉深圳大学数学与计算科学学院深圳518060

对受噪声干扰的超混沌Lorenz-Stenflo系统的同步问题进行了研究.在设计一种新型比例积分滑模流形的基础上,选取了只含一个控制项的滑膜控制器,根据滑模控制理论证明在此控制器下受噪声干扰的超混沌Lorenz-Stenflo系统能实现同步,并用陡... 详细信息

对受噪声干扰的超混沌Lorenz-Stenflo系统的同步问题进行了研究.在设计一种新型比例积分滑模流形的基础上,选取了只含一个控制项的滑膜控制器,根据滑模控制理论证明在此控制器下受噪声干扰的超混沌Lorenz-Stenflo系统能实现同步,并用陡峭的连续饱和函数代替不连续的符号函数,消除了同步过程中的抖动.数值模拟结果表明:该滑模控制器能有效实现混沌同步,且对不匹配的噪声干扰具有强的鲁棒性.

关键词：同步超混沌Lorenz-Stenflo系统滑模控制噪声干扰

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互花米草侵入滩涂生态修复路径探索

港口航道与近海工程 2024年第3期61卷 146-150页

作者：葛安定中交第一航务工程勘察设计院有限公司天津300220

滨海湿地是近海生物重要栖息繁殖地和鸟类迁徙中转站,具有重要的生态功能,江苏如东湿地是国家重点保护的湿地之一,保护并及时修复受损沿海生态意义重大。本文结合具体项目,探索通过人工割除、维护性疏浚弃土覆盖、良性植被替代相组合的... 详细信息

滨海湿地是近海生物重要栖息繁殖地和鸟类迁徙中转站,具有重要的生态功能,江苏如东湿地是国家重点保护的湿地之一,保护并及时修复受损沿海生态意义重大。本文结合具体项目,探索通过人工割除、维护性疏浚弃土覆盖、良性植被替代相组合的方式,探索修复被互花米草入侵破坏的沿海生态的路径,为沿海生态保护一体化项目提供借鉴。

关键词：互花米草侵入生态修复

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