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Semi-global weighted output average tracking of discrete-time heterogeneous multi-agent systems subject to input saturation and external disturbances

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Control Theory and Technology 2023年第3期21卷 315-333页

作者： Qilin song Yuanlong li Yijing Xie Zongli lin department of Automation Shanghai Jiao Tong UniversityShanghai 200240China department of Electrical Engineering University of Texas at ArlingtonArlington 76019TXUSA Charles L.Brown department of Electrical and Computer Engineering University of VirginiaCharlottesville 22904-4743VAUSA

In this paper,we revisit the semi-global weighted output average tracking problem for a discrete-time multi-agent system subject to input saturation and external *** multi-agent system consists of multiple heterogeneous linear systems as leader agents and multiple heterogeneous linear systems as follower *** design both the state feedback and output feedback control protocols for each follower *** particular,a distributed state observer is designed for each follower agent that estimates the state of each leader *** the output feedback case,state observer is also designed for each follower agent to estimate its own *** these estimates,we design low gain-based distributed control protocols,parameterized in a scalar low gain *** is shown that,for any bounded set of the initial conditions,these control protocols cause the follower agents to track the weighted average of the outputs of the leader agents as long as the value of the low gain parameter is tuned sufficiently *** results illustrate the validity of the theoretical results.

关键词： Distributed average tracking Input saturation Low gain feedback Heterogeneous multi-agent systems Output regulation

liquid-crystal Assembly of Semiflexible-coil/Homopolymer Blends: a Dissipative Particle Dynamics Study

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Chinese Journal of Polymer Science 2018年第10期36卷 1200-1206页

作者： Yan-Yan Wang Qing-liang song lin-li He department of Physics Wenzhou University

The liquid-crystal assembly of semiflexible-coil diblock copolymers with coil or semiflexible homopolymers is studied by dissipative particle dynamics simulation. Phase diagrams of the blends and orientation ordering parameters among semiflexible blocks are constructed as a function of chain stiffness and homopolymer volume fraction. For semiflexible-coil/coil blends with varying stiffness of semiflexible blocks, we display the rich phase behaviors of the system transited from coil-coil/coil to rod-coil/coil blends. The disorder- lamellae or lamellae-liquid crystalline transition and ＂dry brush＂ phenomenon induced by coil homopolymers are observed. For semiflexible-coil/semiflexible blends, adding semiflexible homopolymers also leads to a disorder-order transition and even a transition between monolayer and bilayer smectic-A phase. The results demonstrate that blending homopolymers into semiflexible copolymers can induce liquid-crystal assembly and even improve the orientation ordering of semiflexible blocks effectively.

关键词： liquid-crystal assembly Semiflexible-coil Homopolymers Orientation

Toxic effects of nano-TiO_(2)in bivalves——A synthesis of meta-analysis and bibliometric analysis

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Journal of Environmental Sciences 2021年第6期33卷 188-203页

作者： Zhuoqing li Menghong Hu Hanting song Daohui lin Youji Wang International Research Center for Marine Biosciences at Shanghai Ocean university Ministry of Science and TechnologyShanghai 201306China Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources Ministry of EducationShanghai Ocean UniversityShanghai 201306China department of Environmental Science Zhejiang UniversityHangzhou 310058China

Since the beginning of the 21 st century,the increasing production and application of nano-TiO_(2)in consumer products have inevitably led to its release into aquatic systems and therefore caused the exposure of aquatic organisms,resulting in growing environmental ***,the safety of nano-TiO_(2)in aquatic environments has not been systematically assessed,especially in coastal and estuary waters where a large number of filterfeeding animals *** are considered around the world to be a unique target group for nanoparticle toxicity,and numerous studies have been conducted to test the toxic effects of nano-TiO_(2)on *** aim of this review was to systematically summarize and analyze published data concerning the toxicological effects of nano-TiO_(2)in *** particular,the toxicity of nano-TiO_(2)to the antioxidant system and cell physiology was subjected to meta-analysis to reveal the mechanism of the toxicological effects of nano-TiO_(2)and the factors affecting its toxicological *** reveal the cooperation,hot keywords and cocitations in this field,bibliometric analysis was conducted,and the results showed that the toxicological molecular mechanisms of nano-TiO_(2)and the combined effects of nano-TiO_(2)and other environmental factors are two major hot ***,some perspectives and insights were provided in this review for future research on nano-TiO_(2)toxicology in bivalves.

关键词： Meta-analysis Titanium dioxide nanoparticles Toxic effect Bivalves Bibliometric analysis

疾病不确定感在老年慢性心力衰竭患者自我效能与个人掌控感间的中介效应分析

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中华现代护理杂志 2024年第23期30卷 3185-3190页

作者：林春敏宋丹丹程丽吉林大学中日联谊医院老年病科长春130033 吉林大学中日联谊医院消化内科长春130033

目的探讨自我效能对老年慢性心力衰竭患者个人掌控感的直接影响,以及疾病不确定感的间接影响,以期为制订改善老年慢性心力衰竭患者个人掌控感的干预措施提供理论依据。方法采用便利抽样法,选取2023.1—11月在吉林大学中日联谊医院老年... 详细信息

目的探讨自我效能对老年慢性心力衰竭患者个人掌控感的直接影响,以及疾病不确定感的间接影响,以期为制订改善老年慢性心力衰竭患者个人掌控感的干预措施提供理论依据。方法采用便利抽样法,选取2023.1—11月在吉林大学中日联谊医院老年病科住院的240例老年慢性心力衰竭患者为研究对象。采用个人掌控量表、疾病不确定感量表、一般自我效能量表对患者进行调查。采用Bootstrap法检验疾病不确定感在老年慢性心力衰竭患者自我效能与个人掌控感间的中介效应。结果本研究发放问卷240份,回收有效问卷221份,回收有效率为92.08%。221例老年慢性心力衰竭患者个人掌控量表总分为(21.49±5.92)分;疾病不确定感量表总分为(75.00±20.94)分;一般自我效能量表总分为(21.15±6.10)分。中介效应分析结果显示,自我效能对个人掌控感的总效应为0.557(95%CI:0.43.~0.659,P=0.001);自我效能对个人掌控感的直接效应为0.3.1(95%CI:0.157~0.455,P=0.001);自我效能对个人掌控感的间接效应为0.246(95%CI:0.169~0.3.4,P<0.001)。疾病不确定感在老年慢性心力衰竭患者自我效能与个人掌控感间起部分中介效应,中介效应占总效应的44.17%。结论老年慢性心力衰竭患者个人掌控感处于较低水平。临床医务工作者应采取一定的干预措施提高患者的自我效能,降低患者的疾病不确定感,从而改善其个人掌控感。

关键词：老年人慢性心力衰竭个人掌控感自我效能疾病不确定感

不同吸入药物对慢性阻塞性肺疾病频繁咳嗽患者治疗效果的影响

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中国医师杂志 2024年第6期26卷 805-810页

作者：李雪杉宋庆成玮刘聪林铃曾玉琴易荣李欣陈平中南大学湘雅二医院呼吸与危重症医学科中南大学呼吸疾病研究所湖南省呼吸与危重症疾病临床医学研究中心中南大学呼吸疾病诊疗中心长沙410011 株洲市中心医院呼吸与危重症医学科株洲412007 湖南省职业病防治医院结核科长沙410000

目的比较慢性阻塞性肺疾病(慢阻肺)频繁咳嗽患者使用不同吸入药物的治疗效果,包括症状变化和急性加重。方法本研究来源于RealDTC研究,研究对象为2016年12月至2023.3.中南大学湘雅二医院呼吸与危重症医学科门诊数据库中的稳定期慢阻肺... 详细信息

目的比较慢性阻塞性肺疾病(慢阻肺)频繁咳嗽患者使用不同吸入药物的治疗效果,包括症状变化和急性加重。方法本研究来源于RealDTC研究,研究对象为2016年12月至2023.3.中南大学湘雅二医院呼吸与危重症医学科门诊数据库中的稳定期慢阻肺患者,收集患者的人口学特征、吸烟状况、生物燃料暴露史、过去1年急性加重病史、肺功能、慢阻肺评估测试(CAT)评分、改良版英国医学研究委员会呼吸困难问卷(mMRC)评分及吸入药物方案。定义CAT评分中第1项咳嗽分数≥2分为频繁咳嗽患者,根据吸入药物类型将频繁咳嗽患者分为长效抗胆碱药物(LAMA)、长效β2受体激动剂(LABA)+LAMA、吸入性糖皮质激素(ICS)+LABA和ICS+LABA+LAMA组。第6个月随访时,收集CAT评分,评估症状控制情况,包括最小临床改善(MCID)(定义为第6个月的CAT评分相对于基线降低≥2分)和咳嗽症状改善(定义为咳嗽分数相对于基线降低≥1分)。在1年的随访中,评估急性加重的次数。多因素logistic回归分析评估慢阻肺频繁咳嗽患者不同吸入药物与预后之间的关系。结果共纳入653.慢阻肺频繁咳嗽患者,CAT评分为(16.4±6.1)分,咳嗽分数为3.2,3.分。随访6个月,403.(61.7%)患者达到了MCID,3.4例(60.3.)患者咳嗽症状改善;随访1年,227例(3..8%)的患者发生了急性加重。接受吸入药物治疗后,LAMA、LABA+LAMA、ICS+LABA、ICS+LABA+LAMA四组频繁咳嗽患者的CAT评分、咳嗽分数均较治疗前下降(均P0.05)。多因素logistic回归分析结果显示,与使用LAMA或ICS+LABA药物治疗的患者相比,使用LABA+LAMA或ICS+LABA+LAMA药物治疗的慢阻肺频繁咳嗽患者更容易达到MCID,更少发生急性加重(均P<0.05)。结论与LAMA或ICS+LABA相比,接受LABA+LAMA或ICS+LABA+LAMA药物治疗的慢阻肺频繁咳嗽患者症状更容易改善,并且发生急性加重的风险更低。

关键词：肺疾病,慢性阻塞性咳嗽投药,吸入

Global Existence and Asymptotic Behavior of Solutions to a Free Boundary Problem for the 1D Viscous Radiative and Reactive Gas

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Acta Mathematica Sinica,English Series 2018年第5期34卷 827-842页

作者： Chang Ming song Hong li Jian lin ZHANG department of Applied Mathematics College of Science Zhongyuan University of Technology Zhengzhou 450007 P. R. China department of Applied Physics College of Science Zhongyuan University of Technology Zhengzhou 450007 P. R. China

In this paper, we study a free boundary problem for the 1D viscous radiative and reactive gas. We prove that for any large initial data, the problem admits a unique global generalized solution. Meanwhile, we obtain th... 详细信息

关键词： Radiative and reactive gases global solution free boundary problem asymptotic behavior

Automatic microseismic events detection using morphological multiscale top-hat transformation

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Petroleum Science 2022年第5期19卷 2027-2045页

作者： Guo-Jun Shang Wei-lin Huang li-Kun Yuan Jin-song Shen Fei Gao li-song Zhao State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum-BeijingBeijing102249China department of Automation China University of Petroleum-BeijingBeijing102249China Hebei Coal Research Institute Company Ltd. Jizhong Energy GroupXingtaiHebei 054000China

The occurrence of microseismic is not random but is related to the physical properties of the underground *** to the low intensity and the influence of noise,microseismic eventually lead to poor signal-to-noise *** proposed a method for automatic detection of microseismic events by adoption of multiscale top-hat *** method is based on the difference between the signal and noise in the multiscale top-hat transform section and achieves the detection on a specific *** microseismic data are decomposed into different scales by multiscale morphology top-hat transformation *** the potential microseismic events could be detected by picking up the peak value in the multiscale top-hat section,and the characteristic profile obtains the start point with a specific threshold ***,the synthetic data experiences demonstrate the advantages of this method under strong and weak noisy conditions,and the filed data example also shows its reliability and adaptability.

关键词： Microseismic events detection Multiscale morphology Top-hat transformation

SELECTIVE INDIRECTIVE ELECTROOXIDATION OF THE SIDE CHAIN OF AROMATIC COMPOUNDS

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Chinese Chemical Letters 1992年第8期3卷 595-596页

作者： song lin ZHANG Gui Lan WANG Zhi Hong li Kun CAI {3. Of Chemistry Henan Normal university Xinxiang 453.02

This paper describes the indirect electrooxidation of the side chain of aromatic com. pounds with a Ce(Ⅳ)/Ce(Ⅲ)redox *** reaction has the following advantages:favourable selectivity,high yield,nonpollution and economy.

关键词： Th

松辽盆地德惠断陷白垩系烃源岩特征及其控藏作用

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岩性油气藏 2024年第6期36卷 122-134页

作者：屈卫华田野董常春郭小波李立立林斯雅薛松杨世和中国石油吉林油田公司勘探事业部吉林油田数智技术公司中国石油吉林油田公司勘探开发研究院西安石油大学地球科学与工程学院中国石油集团测井有限公司地质研究院

基于烃源岩、天然气、储层流体包裹体等实验分析，系统研究了松辽盆地德惠断陷白垩系烃源岩地球化学特征、发育环境、天然气成因与来源、油气成藏期次以及烃源岩的控藏作用等。研究结果表明：（1）德惠断陷白垩系烃源岩TOC普遍大于1%，... 详细信息

基于烃源岩、天然气、储层流体包裹体等实验分析，系统研究了松辽盆地德惠断陷白垩系烃源岩地球化学特征、发育环境、天然气成因与来源、油气成藏期次以及烃源岩的控藏作用等。研究结果表明：（1）德惠断陷白垩系烃源岩TOC普遍大于1%，有机质类型以Ⅲ型为主，Ⅱ型样品主要分布在农安南洼陷，总体处于成熟—高成熟的大量生气阶段；火石岭组与营城组烃源岩形成于还原—弱还原、水体盐度较高的沉积环境，农安南洼陷火石岭组烃源岩中浮游生物、藻类等低等生源贡献较大，生油能力更强。（2）白垩系天然气组成差异大，烷烃气体积分数为2.0%～98.5%,CO2体积分数为0.1%～96.5%；天然气主要为煤成气，受不同期次天然气充注影响，部分气样呈碳同位素倒转特征；郭家、华家与农安南洼陷的油气源岩以火石岭组为主；鲍家洼陷的天然气可能主要来自营城组；CO2主要为无机成因，随埋深增大，碳酸盐胶结物碳同位素组成表现为正偏移，指示深部存在钻遇高无机CO2气层的风险。（3.农安南洼陷的烃源岩正处于大量生油阶段，由南部至北部，烃源岩热演化程度逐渐增高，控制了“南油北气”的相态分布，也控制了油气成藏期次；工业油气流井主要分布在烃源岩厚度较大地区及附近，烃源岩的分布控制了油气藏的分布。

关键词：烷烃 CO2 烃源岩气源对比成藏期次煤成气火石岭组营城组白垩系德惠断陷松辽盆地