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COMPLEXITY ANALYSIS OF NETWORK-BASED DYNAMICAL SYSTEMS

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Journal of Systems Science & Complexity 2011年第3期24卷 413-432页

作者： Guofeng ZHANG Long WANG tongwen chen School of Electronic Engineering University of Electronic Science and Technology of China Chengdu 610054 China. Intelligent Control Laboratory Center for Systems and Control College of Engineering Peking University Beijing 100871 China Department of Electrical and Computer Engineering University of Alberta Edmonton Alberta T6G 2V4 Canada

This paper investigates the nonlinear dynamics of network-based dynamical systems where network communication channels of finite data rates are inserted into the closed loops of the control systems. The authors analyze the bifurcation and chaotic behavior of the non-smooth dynamical systems. The authors first prove that for almost all system parameters there are no periodic orbits. This result distinguishes this type of non-smooth dynamical systems from many others exhibiting border-collision bifurcations. Next, the authors show analytically that the chaotic sets are separated from the region containing the line segment of all fixed points with a finite distance. Finally, the authors employ a simple model to highlight that both the number of clients sharing a common network channel and fluctuations in the available network bandwidth have significant influence on the performance of such dynamical systems.

关键词： Bifurcation feedback network-based dynamical system non-convexity periodicity.

A new periodic event-triggered control scheme with guaranteed minimum inter-event times

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A new periodic event-triggered control scheme with guarantee...

Adaptive event-triggered PID controllers for linear discrete-time plants

第40届中国控制会议

作者： Hao Yu tongwen chen Department of Electrical and Computer Engineering University of Alberta

This paper proposes a new periodic event-triggered state-feedback control scheme to stabilize linear plants with bounded external disturbances, where the events are checked only at some discrete sampling instants and the inter-sampling times are not necessary to be periodic. By introducing some average signals on the state over one inter-event time interval, a new event-triggering condition is designed;and the corresponding system is formulated into a hybrid system model. Sufficient conditions on the design of event-triggering conditions are provided to ensure the input-to-state stability with respect to disturbances. Meanwhile, a guaranteed lower bound on minimum inter-event times is provided which is independent of the sampling behavior. This is helpful to improve transmission performance against time-varying inter-sampling times. Finally, simulation results are given to illustrate the efficiency and feasibility of the theoretical results.

关键词： Event-triggered control hybrid systems robust control guaranteed minimum inter-event times

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Adaptive event-triggered PID controllers for linear discrete...

带着信仰学党史面向群众办实事--郑州公交开展党史学习教育工作纪实

第三十九届中国控制会议

作者： Hao Yu Zhe Guan tongwen chen Toru Yamamoto Department of Electrical and Computer Engineering University of Alberta Data-Driven Smart Systems Collaborative Research Laboratory KOBELCO Construction Machinery Dream-Driven Co-Creation Research Center Hiroshima University Graduate School of Advanced Science and Engineering Hiroshima University

This paper studies adaptive event-triggered PID controllers for 2nd-order linear discrete-time plants for set-point tracking. A new adaptive law is designed by introducing a decay parameter to improve the robustness of the closed-loop *** utilizing the extra robustness, an absolute type of event-triggering conditions is proposed, where the threshold parameter is co-designed with the adaptive laws. Then, the closed-loop system is formulated into a nonlinear interconnected system among the tracking errors, the differences of outputs, and the parameter estimation errors. A rigorous proof of stability is provided to ensure that the tracking error converges to a vicinity of zero when the initial state belongs to some compact sets. Finally,numerical simulations are given to illustrate the efficiency and feasibility of the proposed results.

关键词： Adaptive control event-triggered control linear systems PID controllers

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城市公共交通 2021年第11期 18-19页

作者：陈同文郑州市公共交通集团有限公司

2021年是党的百年华诞。郑州公交集团公司党委把开展好党史学习教育作为新时代强化党建统领、推进改革创新的重要抓手,引领党员干部认认真真学党史,扎扎实实抓教育,在“我为群众办实事”的具体实践中,厚植公交为民情怀,提升市民美好出... 详细信息

2021年是党的百年华诞。郑州公交集团公司党委把开展好党史学习教育作为新时代强化党建统领、推进改革创新的重要抓手,引领党员干部认认真真学党史,扎扎实实抓教育,在“我为群众办实事”的具体实践中,厚植公交为民情怀,提升市民美好出行体验,切实把学习教育成果转化为企业高质量转型发展的奋进动力,以优异成绩庆祝建党100周年。

关键词：集团公司党委党员干部党史学习百年华诞成果转化转型发展为民情怀公交

让理论宣传在公交企业强起来——郑州公交理论宣传工作实践记述

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城市公共交通 2020年第10期 20-21页

作者：陈同文郑州市公共交通总公司

理论上的清醒坚定决定政治上的清醒坚定。近年来,郑州公交严格落实上级党委部署要求,旗帜鲜明坚持习近平新时代中国特色社会主义思想,严把政治导向,强化理论武装,保持严实作风,一以贯之推进党的创新理论"落地生根",为企业改革发展坚定... 详细信息

理论上的清醒坚定决定政治上的清醒坚定。近年来,郑州公交严格落实上级党委部署要求,旗帜鲜明坚持习近平新时代中国特色社会主义思想,严把政治导向,强化理论武装,保持严实作风,一以贯之推进党的创新理论"落地生根",为企业改革发展坚定信心、鼓舞士气、汇聚力量。

关键词：习近平新时代中国特色社会主义思想理论宣传工作公交企业政治导向强化理论党的创新理论严格落实落地生根

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糖尿病从瘀论治的临床研究进展

中国中医药信息杂志 2000年第1期7卷 18-19页

作者：陈通文广东省珠海市中医院

糖尿病瘀血证是近年来糖尿病研究较活跃的新课题。本文就糖尿病瘀血证的病因,宏观微观变化指标及使用活血化瘀法的类型、作用机理等方面研究作一简要综述。1 糖尿病瘀血病机探讨中医文献中早有消渴证与瘀血证关系的描述。张仲景在《金... 详细信息

糖尿病瘀血证是近年来糖尿病研究较活跃的新课题。本文就糖尿病瘀血证的病因,宏观微观变化指标及使用活血化瘀法的类型、作用机理等方面研究作一简要综述。1 糖尿病瘀血病机探讨中医文献中早有消渴证与瘀血证关系的描述。张仲景在《金匮要略》中记载:“病者为热伏,烦满,口干燥而渴,其脉反而不热,此为阴状,是瘀血也”。唐容川认为“瘀血在里则口渴,所以然者,血与气本不相离,内有瘀血,气不得通,不能载津上升,是以为渴,名曰血渴,瘀去则不渴矣”。祝氏认为气虚无力鼓动血行而成瘀。周氏认为糖尿病瘀血。

关键词：糖尿病从瘀论治中医药疗法

Finite-Time Consensus of Multi-Agent Systems with Directed and Intermittent Links

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Finite-Time Consensus of Multi-Agent Systems with Directed a...

An Fe-N/S-C hybrid electrocatalyst derived from bimetal-organic framework for efficiently electrocatalyzing oxygen reduction reaction in acidic media

第三十届中国控制会议

作者： XIAO Feng~1,WANG Long~2,chen tongwen~1 1.Department of Electrical and Computer Engineering,University of Alberta,Edmonton,Alberta T6G 2V4,Canada 2.Intelligent Control Laboratory,Center for Systems and Control,College of Engineering,Peking University,Beijing 100871,P.R.China

＜正＞This paper considers the finite-time consensus problem in multi-agent systems with unidirectional and intermittent *** interaction topology is indeed directed and *** propose a simple but effective distributed nonlinear protocol in the form of a continuous state feedback and show that if the union of the interaction topology over a period of time contains a spanning tree periodically,then all agents will reach an agreement on states asymptotically;and if the sum of time intervals,over which the interaction topology contains a spanning tree,is sufficiently large,then all agents will reach an agreement on states in a finite time.

关键词： Multi-agent Systems Finite-time Consensus Directed Topologies Switching Topologies

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Journal of Energy Chemistry 2021年第1期30卷 291-300,I0010页

作者： Shuqin Song Mingmei Wu Junwei chen Zhuohua Mo Rui chen Kun Wang tongwen Yu The Key Lab of Low-carbon Chemistry&Energy Conservation of Guangdong Province School of Materials Science and EngineeringSchool of ChemistrySchool of Chemical Engineering and TechnologySun Yat-sen UniversityGuangzhou 510275GuangdongChina

Heteroatoms doped Fe-N-C electrocatalysts have been widely acknowledged as one of the most promising candidates to replace Pt-based materials for electrocatalyzing oxygen reduction reaction(ORR).However,the complicated synthesis method and controversial catalytic mechanism represent a substantial impediment as of ***,a very facile strategy to prepare Fe-N/S-C hybrid through pyrolyzing Zn and Fe bimetallic MOFs is rationally *** electrocatalytic ORR performance shows a volcanotype curve with the increment of added Fe *** half-wave potential(E1/2) for ORR at optimized Fe-N/S-C-10%(10%=n(Fe)/(n(Fe)+n(Zn)),n(Fe) and n(Zn) represent the moles of Fe2+ and Zn2+ in the precursors,respectively) shifts significantly to the positive direction of 19.6 mV with respect to that of Pt/C in acidic media,as well as a high 4 e selectivity and methanol *** 10,000 potential cycles,E1/2 exhibits a small negative shift of-27.5 mV at Fe-N/S-C-10% compared favorably with Pt/C(~141.0 mV).This can be attributed to:(ⅰ) large specific surface area(849 m^(2)/g) and hierarchically porous structure are favorable for the rapid mass transfer and active sites exposure;(ⅱ) the embedded Fecontaining nanoparticles in porous carbon are difficult to be moved and further agglomerated during the electrochemical accelerated aging test,further improving its stability;(ⅲ) there exist small Fecontaining nanoparticles,uniformly doped N and S,abundant Fe-N as efficiently active *** work represents a breakthrough in the development of high-efficient non-precious-metal catalysts(NPMCs)to address the current Pt-based electrocatalysts challenges.

关键词： Bimetallic MOFs Fe-N/S-C Oxygen reduction reaction Acidic media

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补肾生精法对老龄大鼠睾丸蛋白表达谱的影响

广州中医药大学学报 2008年第5期25卷 442-445页

作者：陈通文曾金雄王海鹰黄锦燕广东省中医院珠海医院男科广东珠海519015 福州东方医院福建福州350000

【目的】观察补肾生精法对老龄大鼠睾丸蛋白表达谱的影响。【方法】选用20只22月龄老龄雄性SD大鼠随机分为2组,每组10只,分别为空白对照组和补肾生精组;补肾生精组给药剂量为0.05 ***-.1d-1,连续灌胃给药60 d。取大鼠右侧睾丸,采用双向... 详细信息

【目的】观察补肾生精法对老龄大鼠睾丸蛋白表达谱的影响。【方法】选用20只22月龄老龄雄性SD大鼠随机分为2组,每组10只,分别为空白对照组和补肾生精组;补肾生精组给药剂量为0.05 ***-.1d-1,连续灌胃给药60 d。取大鼠右侧睾丸,采用双向凝胶电泳法分析空白对照组和补肾生精组大鼠睾丸差异表达蛋白。【结果】与空白对照组比较,补肾生精组大鼠睾丸中有7种蛋白表达发生了显著变化,其中4种蛋白表达上调,3种下调。对7种差异表达蛋白点胶内酶切后进行质谱分析,其中5种蛋白分别鉴定为磷脂酰乙醇胺结合蛋白(phosphatidylethanolamine-binding protein,PEBP)、热休克蛋白8(heat shock 70 kDa protein 8,HSP7C)、磷酸丙糖异构酶(triose-phosphate isomerase,TPIS)、3-磷酸甘油醛脱氢酶(glyceraldehyde-3-phosphate dehydrogenase,GAPDH)、谷胱苷肽-S-基转移酶1(glutathione S-transferase Mu 1,GSTM1-1)。【结论】补肾生精法延缓衰老的作用可能与其能调节老龄大鼠睾丸蛋白表达有关。

关键词：补肾生精法/治疗应用衰老/中药疗法蛋白质组疾病模型,动物大鼠