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Mean Square Average Generalized Consensus of Multi-Agent Systems Under Time-Delays and Stochastic Disturbances

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Journal of Systems Science & Complexity 2019年第2期32卷 588-599页

作者： QIU Li guo liuxiao LIU Jia School of Science Jiangnan University

Compared with the traditional consensus problem, this paper deals with the mean square average generalized consensus(MSAGC) of multi-agent systems under fixed directed topology, where all agents are affected by stochastic disturbances. Distributed protocol depending on delayed time information from neighbors is designed. Based on Lyapunov stability theory, together with results from matrix theory and It o s derivation theory, the linear matrix inequalities approach is used to establish sufficient conditions to ensure MSAGC of multi-agent systems. Finally, numerical simulations are provided to illustrate the theoretical results.

关键词： Mean square average generalized consensus multi-agent systems stochastic disturbances time delays

Generalized Consensus of Discrete-Time Multi-Agent Systems with Directed Topology and Communication Delay

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Journal of Systems Science & Complexity 2020年第6期33卷 1903-1913页

作者： LIU Huwei CHEN Xin guo liuxiao HU Aihua School of Science Jiangnan UniersityWuzi 214122China

Compared with traditional consensus,this paper studies the generalized consensus problem for discrete-time multi-agent systems with directed topology and communication delay.Novel distributed consensus protocols with and without communication delay are designed.Based on the analysis of error dynamical system and graph theory,the generalized consensus is globally asymptotically achieved under suitable conditions without changing the zero row-sums property of Laplacian matrix in networks.Moreover,the sufficient conditions for generalized consensus of communication delay are obtained under directed connections.Finally,some simulations have been provided to verify the theoretical results.

关键词： Communication delay connection topology discrete-time multi-agent systems generalized consensus

一种C_(3)N_(4)光催化剂的制备及其对四环素类抗生素的降解

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中国环境科学 2024年第4期44卷 2073-2082页

作者：高艺芳郭瑞焦媛刘晓娜钱天伟太原理工大学环境科学与工程学院山西晋中030606

以单一尿素为前驱体,通过热聚合制备了C_(3)N_(4),并通过SEM、XRD、XPS、FT-IR、UV-Vis等分析表征了所制备的C_(3)N_(4)材料的结构、成分、光学性能和光催化活性.结果发现制备的C_(3)N_(4)具有花状的多孔纳米片结构和大的比表面积.制备... 详细信息

以单一尿素为前驱体,通过热聚合制备了C_(3)N_(4),并通过SEM、XRD、XPS、FT-IR、UV-Vis等分析表征了所制备的C_(3)N_(4)材料的结构、成分、光学性能和光催化活性.结果发现制备的C_(3)N_(4)具有花状的多孔纳米片结构和大的比表面积.制备的C_(3)N_(4)在氙灯320~780nm的照射下,对盐酸四环素(TCH)的降解表现出良好的光催化活性,60min内降解率达到99.60%.自由基淬灭实验的结果表明,·O_(2)^(-)、^(1)O_(2)和h^(+)是TCH降解的主要原因.对比试验和DFT理论计算分析发现,以尿素为原料制备的C_(3)N_(4)比三聚氰胺为原料制备的M-C_(3)N_(4)光催化效果优异是归因于C_(3)N_(4)具有花状的多孔结构,更大比表面积以更多的活性位点和氧空位.此外,制备的催化剂C_(3)N_(4)对四环素类的抗生素(盐酸金霉素(CTC)和土霉素(OTC))具有类似的催化效果.进一步通过分析光催化氧化中间产物,提出了TCH可能的降解路径.

关键词：光催化 C_(3)N_(4) 四环素理论计算

Phase engineering of metal-organic frameworks

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Aggregate 2022年第1期3卷 93-107页

作者： Chen Ma Long Zheng Gang Wang Jun guo liuxiao Li Qiyuan He Ye Chen Hua Zhang Department of Chemistry The Chinese University of Hong KongShatinHong KongChina Department of Chemistry City University of Hong KongKowloonHong KongChina Department of Materials Science and Engineering City University of Hong KongKowloonHong KongChina Hong Kong Branch of National Precious Metals Material Engineering Research Center(NPMM)City University of Hong KongKowloonHong KongChina Shenzhen Research Institute City University of Hong KongShenzhenChina

As an important category of porous crystalline materials,metal-organic frameworks(MOFs)have attracted extensive research interests owing to their unique structural features such as tunable pore structure and enormous surface area.Besides controlling the size,dimensionality,and composition of MOFs,further exploring the crystal-phase-dependent physicochemical properties is essential to improve their performances in various applications.Recently,great progress has been achieved in the phase engineering of nanomaterials(PEN),which provides an effective strategy to tune the functional properties of nanomaterials by modulating the arrangement of atoms.In this review,we adopt“phase”instead of“topology”to describe the crystal structure of MOFs and summarize the recent advances in phase engineering of MOFs.The two main strategies used to control the phase of MOFs,that is,phasecontrolled synthesis and phase transformation of MOFs,will be highlighted.The roles of various reaction parameters in controlling the crystal phase of MOFs are discussed.Then,the phase dependence of MOFs in various applications including luminescence,adsorption,and catalysis are introduced.Finally,some personal perspectives about the challenges and opportunities in this emerging field are presented.

关键词： crystal phase metal-organic frameworks phase engineering phase transformation phase-controlled synthesis

Ultra-thin metal-organic framework nanoribbons

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National Science Review 2020年第1期7卷 46-52页

作者： Bingqing Wang Meiting Zhao liuxiao Li Ying Huang Xiao Zhang Chong guo Zhicheng Zhang Hongfei Cheng Wenxian Liu Jing Shang Jing Jin Xiaoming Sun Junfeng Liu Hua Zhang State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Center for Programmable Materials School of Materials Science and Engineering Nanyang Technological University Department of Chemistry City University of Hong Kong

Structure engineering of metal-organic frameworks(MOFs) at the nanometer scale is attracting increasing interest due to their unique properties and new functions that normally cannot be achieved in bulk MOF crystals. Here, we report the preparation of ultra-thin MOF nanoribbons(NRBs) by using metal-hydroxide nanostructures as the precursors. Importantly, this general method can be used to synthesize various kinds of ultra-thin MOF NRBs, such as MBDC(M = Co, Ni; BDC = 1,4-benzenedicarboxylate), NiCoBDC,CoTCPP(TCPP = tetrakis(4-carboxyphenyl)porphyrin) and MIL-53(Al) NRBs. As a proof-of-concept application, the as-prepared ultra-thin Co BDC NRBs have been successfully used as a fluorescent sensing platform for DNA detection, which exhibited excellent sensitivity and selectivity. The present strategy might open an avenue to prepare MOF nanomaterials with new structures and unique properties for various promising applications.

关键词： metal-organic frameworks nanoribbons metal-hydroxide nanostructures structure engineering DNA detection

Soil Air Regime of Corn Field Under Plastic Mnlching

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Pedosphere 1995年第3期5卷 245-250页

作者： CHENYONG－XIANG liuxiao－YI 等 ShenyangAgriculturalUniversity DonglingSHenyang110161China ShenyangAgriculturalUniversity Dongling

ＳｏｉｌＡｉｒＲｅｇｉｍｅｏｆＣｏｒｎＦｉｅｌｄＵｎｄｅｒＰｌａｓｔｉｃＭｎｌｃｈｉｎｇＣＨＥＮＹＯＮＧ－ＸＩＡＮＧ；ＬＩＵＸＩＡＯ－ＹＩａｎｄＬＩＵＭＩＮＧ－ＧＵＯ（ＳｈｅｎｙａｎｇＡｇｒｉｃｕｌｔｕｒａｌＵｎｉｖ... 详细信息

ＳｏｉｌＡｉｒＲｅｇｉｍｅｏｆＣｏｒｎＦｉｅｌｄＵｎｄｅｒＰｌａｓｔｉｃＭｎｌｃｈｉｎｇＣＨＥＮＹＯＮＧ－ＸＩＡＮＧ；ＬＩＵＸＩＡＯ－ＹＩａｎｄＬＩＵＭＩＮＧ－ＧＵＯ（ＳｈｅｎｙａｎｇＡｇｒｉｃｕｌｔｕｒａｌＵｎｉｖｅｒｓｉｔｙ，Ｄｏｎｇｌｉｎｇ，Ｓ...

关键词：塑膜覆盖玉米田土壤空气状况

Responses of Different Pakchoi (Brassica chinensis L.) Cultivars to Cu Toxicity

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Pedosphere 2005年第1期15卷 9-15页

作者： ZHOUDong-Mei XUEYan liuxiao-Hong HAOXiu-Zhen CHENHuai-Man SHENZhen-guo SIYou-Bin StateKeyLaboratoryofSoilandSustainableAgriculture InstituteofSoilScienceChineseAcademyofSciencesNanjing210008China DepartmentofPlantScience NanjingAgriculturalUniversityNanjing210095China DepartmentofPlantProtection AnhuiAgriculturalUniversityHefei230036China

Two pot experiments with a completely random design and 4 replications were performed in a greenhouse to examine the response difference of 17 cultivars of pakchoi (Brassica chinensis L.) grown in a Cu-spiked and a clean soil to Cu.relatively tolerant. When the 17 cultivars of pakchoi grew in clean garden soil, the Cu concentrations in the aboveground part were positively correlated (r = 0.6693) with their root Cu concentrations. However, when they grew in the Cu-spiked soil a highly negative correlation coefficient (r = -0.5376) was obtained in the Cu concentration between the aboveground part and the root. This meant that the Cu tolerant cultivars had a weak ability to transfer Cu from their root to their aboveground part, and therefore stored much more Cu in their root than the Cu sensitive cultivars.

关键词：小白菜栽培管理铜毒性研究菜园土壤

事件触发下随机非确定线性多智能体的指数同步

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计算机工程与应用 2018年第17期54卷 141-145,163页

作者：邱丽过榴晓江南大学理学院江苏无锡214122

研究随机非确定线性多智能体系统在有向拓扑连接下的指数同步问题,为减少不必要的网络带宽资源的浪费,提出一种基于事件触发控制的协议。根据组合测量对系统中的所有节点设计相应的事件触发函数,使得节点之间的控制信号更新仅在事件触... 详细信息

研究随机非确定线性多智能体系统在有向拓扑连接下的指数同步问题,为减少不必要的网络带宽资源的浪费,提出一种基于事件触发控制的协议。根据组合测量对系统中的所有节点设计相应的事件触发函数,使得节点之间的控制信号更新仅在事件触发时刻进行。基于Lyapunov稳定性理论和M矩阵理论,得到了多智能体系统指数同步结论,并给出了同步的收敛速度。同时,理论排除了事件触发控制过程中的芝诺(Zeno)现象。数值仿真结果进一步验证了理论分析的有效性。

关键词：事件触发控制随机非确定线性多智能体系统指数同步 Zeno现象

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基于噪声的非线性多智能体系统的均方一致性

动力学与控制学报 2018年第1期16卷 80-86页

作者：邱丽过榴晓刘佳江南大学理学院无锡214122

本文主要研究拓扑结构为有向强连接的非线性多智能体系统的均方一致性问题.考虑到非线性系统中的个体在传递信息时受到噪声环境的干扰,提出一种新的延迟控制方案,提高了系统的控制性能.基于Lyapunov稳定性和Ito^积分方程理论,得到多智... 详细信息

本文主要研究拓扑结构为有向强连接的非线性多智能体系统的均方一致性问题.考虑到非线性系统中的个体在传递信息时受到噪声环境的干扰,提出一种新的延迟控制方案,提高了系统的控制性能.基于Lyapunov稳定性和Ito^积分方程理论,得到多智能体系统渐近趋于均方一致的充分条件.同时,得到相同的耦合强度下容许的最大延迟间隔,数值仿真结果进一步验证了理论分析的有效性.

关键词：均方一致性多智能体系统非线性动力学噪声环境延迟