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Science China(Information Sciences) 2025年第1期68卷 292-305页

作者： Tao SHI Wei-Wei CHE School of Mechatronic Engineering and automation Shanghai University State Key Laboratory of Synthetical automation for Process Industries Northeastern University college of Information Science and Engineering Northeastern University

This article proposes a distributed dynamic event-triggered data-driven iterative learning control(DET-DDILC)scheme under a predefined performance to tackle the bipartite tracking control problem for multiagent systems(MASs). An improved dynamic linearization technique is utilized to convert the nonlinear MASs into an iterative linear data model. First,a peer-to-peer mapping function is introduced to map the constrained distributed system output homeomorphism to an unconstrained one. In addition, a DET mechanism based on a time-iteration-varying function is devised to conserve network communication resources. Based on the unconstrained transformation and the designed DET mechanism, the DET-DDILC algorithm is devised to ensure that the bipartite tracking performance of MASs can be within the preset range. Finally, the effectiveness and feasibility of the designed control scheme are demonstrated via a simulation case by a comparison.

关键词： bipartite tracking control prescribed performance event-triggered iterative learning control multiagent systems

New results on finite-time stability and instability theorems for stochastic nonlinear time-varying systems

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Science China(Information Sciences) 2025年第2期68卷 186-199页

作者： Weihai ZHANG Liqiang YAO college of Electrical Engineering and automation Shandong University of Science and Technology School of Mathematics and Information Science Yantai University

This paper studies finite-time stability and instability theorems in the probability sense for stochastic nonlinear timevarying systems. Firstly, a new sufficient condition is proposed to guarantee that the considered system has a global ***, we propose new finite-time stability and instability criteria that relax the constraints on LV(the infinitesimal operator of Lyapunov function V) by the uniformly asymptotically stable function. On the one hand, these obtained results make up for the shortcomings of the existing results. On the other hand, the new finite-time stability theorems can be viewed as natural extensions of the existing results and also allow LV to be indefinite(negative or positive) rather than just only allow LV < ***, some simulation examples verify the validity of the theoretical results.

关键词： stochastic nonlinear systems finite-time stability finite-timeinstability uniformly asymptotically stable function

Stability switches mechanism and PID control in reaction-diffusion network-organized neural systems with transmission delays

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Science China(Technological Sciences) 2025年第2期68卷 199-215页

作者： Xiangyu DU Min XIAO Wenwu YU Jiajin HE college of automation&college of Artificial Intelligence Nanjing University of Posts and TelecommunicationsNanjing 210023China college of Mathematics Southeast UniversityNanjing 211189China

Traditionally,the spatiotemporal dynamics of neural networks have been analyzed in the locally continuous *** this modeling approach is straightforward and practical,it fails to encapsulate real-world networks’intricate topological structures and ***,the mechanisms of stability switches induced by time delays and diffusion effects in networkorganized systems are still ***,effective dynamic optimization strategies for network-organized models remain to be *** this study,we develop a delayed reaction-diffusion neural network model on complex *** system incorporates the effects of inter-nodal diffusion coupling and exhibits profound architectural *** then pioneer the proportional-integral-derivative(PID)feedback control into the network-organized model to modulate dynamic *** linear stability analysis is conducted firstly,demonstrating that Turing patterns and Hopf bifurcation can be induced in the controlled neural network by varying diffusion coefficients and time ***,the bifurcation direction is deduced via the center manifold ***,a series of simulations are performed to validate the theoretical analysis and substantiate the efficacy of the PID control *** results exhibit that the PID feedback controller can flexibly regulate the dynamics of the network-organized systems and possesses excellent disturbance rejection capabilities.

关键词： complex network neural networks PID control turing instability hopf bifurcation time delays turing pattern

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Node ranking based on graph curvature and PageRank

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Chinese Physics B 2025年第2期34卷 496-507页

作者： Hongbo Qu Yu-Rong Song Ruqi Li Min Li Guo-Ping Jiang School of Computer Science Nanjing University of Posts and TelecommunicationsNanjing 210023China college of automation&college of Artificial Intelligence Nanjing University of Posts and TelecommunicationsNanjing 210023China

Identifying key nodes in complex networks is crucial for understanding and controlling their dynamics. Traditional centrality measures often fall short in capturing the multifaceted roles of nodes within these networks. The Page Rank algorithm, widely recognized for ranking web pages, offers a more nuanced approach by considering the importance of connected nodes. However, existing methods generally overlook the geometric properties of networks, which can provide additional insights into their structure and functionality. In this paper, we propose a novel method named Curv-Page Rank(C-PR), which integrates network curvature and Page Rank to identify influential nodes in complex networks. By leveraging the geometric insights provided by curvature alongside structural properties, C-PR offers a more comprehensive measure of a node's influence. Our approach is particularly effective in networks with community structures, where it excels at pinpointing bridge nodes critical for maintaining connectivity and facilitating information flow. We validate the effectiveness of C-PR through extensive experiments. The results demonstrate that C-PR outperforms traditional centrality-based and Page Rank methods in identifying critical nodes. Our findings offer fresh insights into the structural importance of nodes across diverse network configurations, highlighting the potential of incorporating geometric properties into network analysis.

关键词： important nodes graph curvature complex networks network geometry

Vibration Transmission Characteristics of Shoe Sole Based on Mechanical Mobility and Vibration Transmissibility

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Journal of Shanghai Jiaotong University (Science) 2025年第1期30卷 175-186页

作者： Wu, Xuyang Liu, Xiaoying Hao, Yanhua Liu, Changhuang Huang, Xianwei college of Mechanical Engineering and automation Huaqiao University Fujian Xiamen361021 China The First Affiliated Hospital of Xiamen University Fujian Xiamen361003 China

It is particularly important to explore the response and transmission characteristics of shoe sole when exposed to foot-transmitted vibration (FTV) in daily life. In this study, based on mechanical mobility and vibration transmissibility, the vibration response and transmission characteristics of ordinary sole and multi-cellular structure sole under three excitation modes were analyzed with finite element analysis. The analysis results of the ordinary sole are as follows: The distribution and transmission of vibration energy of ordinary sole are more related to the excitation position and mode-shape;the phalange region is more violent in vibration response to vibration and transmission of vibration. In addition, the analysis results of multi-cellular structure soles show that different types of multi-cellular structure soles have different effects on the equivalent mechanical mobility and the equivalent vibration transmissibility, among which Grid type has the greatest influence. So, this study can help prevent foot injury and provide guidance for the optimal design of the sole. © Shanghai Jiao Tong University 2023.

关键词： Transmissions

Interference Suppression and Jitter Elimination Ability-Based Adaption Tracking Guidance for Robotic Fishes

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IEEE/CAA Journal of Automatica Sinica 2025年第1期12卷 126-137页

作者： Dongfang Li Jie Huang Rob Law Xin Xu Limin Zhu Edmond Q.Wu IEEE the School of Electrical Engineering and automation Fuzhou University the Key Laboratory of System Control and Information Processing Ministry of Education the School of Electrical Engineering and automation Fuzhou University 5G+Industrial Internet Institute Fuzhou University the University of Macau the college of Mechatronics and automation National University of Defense Technology the School of Mechanical Engineering Shanghai Jiao Tong University the Department of Computer Science and Engineering Shanghai Jiao Tong University

This work presents an adaptive tracking guidance method for robotic fishes. The scheme enables robots to suppress external interference and eliminate motion jitter. An adaptive integral surge line-of-sight guidance rule is designed to eliminate dynamics interference and sideslip issues. Limited-time yaw and surge speed observers are reported to fit disturbance variables in the model. The approximation values can compensate for the system's control input and improve the robots' tracking ***, this work develops a terminal sliding mode controller and third-order differential processor to determine the rotational torque and reduce the robots' run jitter. Then, Lyapunov's theory proves the uniform ultimate boundedness of the proposed method. Simulation and physical experiments confirm that the technology improves the tracking error convergence speed and stability of robotic fishes.

关键词： Adaptive integral surge line-of-sight approximation robotic fish speed observer

A Wind Tunnel Experimental Study on the Wake Characteristics of a Horizontal Axis Wind Turbine

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Journal of Thermal Science 2025年第1期34卷 145-158页

作者： GUO Xingduo LI Yinran LI Rennian MA Yulong WEI Kui college of Energy and Power Engineering Lanzhou University of TechnologyLanzhou 730050China Key Laboratory of Fluid machinery and Systems Lanzhou 730050China Gansu Provincial Technology Centre for Wind Turbines Lanzhou 730050China

The characteristics of wind turbine wakes are influenced by multiple factors,including the atmospheric boundary layer(ABL)wind and wind turbine operating conditions(e.g.,tip speed ratio and yaw angle).In this study,two types of ABL winds with different velocity gradients and turbulence intensities are generated in a wind tunnel through configurations of spires,baffles,and various numbers of roughness elements.A wind turbine with a rotor diameter of 0.8 m and a hub height of 0.6 m is tested under varying tip speed ratios,yaw angles,and ABL wind *** results indicate that the streamwise velocity deficit in the near-wake region becomes more pronounced with an increase in the tip speed ratio,while the far-wake velocity deficit remains largely unaffected by changes in the tip speed *** the yaw angle increases,the wake deflection becomes more prominent and the wake narrows;the offset of the wake center at various downstream positions grows linearly,reaching a maximum value of approximately half the rotor ***,the turbulence level and influence range in the wake region are reduced when the turbine is *** ABL wind conditions,high turbulence intensity in the incoming flow accelerates wake recovery,and the Reynolds stress at different lateral positions tends to become consistent with increasing longitudinal ***,turbulence has a significant impact on the meandering characteristics of the wind turbine wake,with greater fluctuations in the wake center observed under higher turbulence ***,this study provides insights that could inform the optimal operation of wind farms.

关键词： horizontal axis wind turbine wind tunnel experiment wind turbine wake turbulence

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Self-Triggered Impulsive Control for Nonlinear Stochastic Systems

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IEEE/CAA Journal of Automatica Sinica 2025年第1期12卷 264-266页

作者： Tao Zhan Yi Ji Yabin Gao Hongyi Li Yuanqing Xia the School of Mathematics and Statistics Southwest University the School of Astronautics Harbin Institute of Technology IEEE the college of Electronic and Information Engineering Southwest University Zhongyuan University of Technology the School of automation Beijing Institute of Technology

Dear Editor,This letter deals with the stabilization problem of nonlinear stochastic systems via self-triggered impulsive control(STIC), where the timing of impulsive control actions is not dependent on continuous state monitoring. In contrast to the existing self-triggered control method, novel self-triggered mechanism(STM) is proposed by incorporating a waiting time for stabilizing impulses. This allows for direct prediction of the next impulsive instant.

关键词： Stabilization

Valence electron matching law for MXene-based single-atom catalysts

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Journal of Energy Chemistry 2025年第2期101卷 641-650页

作者： Pei Song Yuhang Zhou Zishan Luo Hang Zhang Xi Sun Sen Lu Zepeng Jia Hong Cui Weizhi Tian Rong Feng Lingxia Jin Hongkuan Yuan School of Mechanical Engineering Shaanxi University of Technology Shaanxi Key Laboratory of Industrial automation Shaanxi University of Technology Shaanxi Key Laboratory of Catalysis College of Chemical & Environment Science Shaanxi University of Technology School of Physical Science and Technology Southwest University

Single-atom catalysts（SACs） have attracted considerable interest in the fields of energy and environmental science due to their adjustable catalytic *** this study,we investigated the matching of valence electron numbers between single atoms and adsorbed intermediates（O,N,C,and H） in MXene-anchored SACs（M-Ti2C/M-Ti2CO2）.The density functional theory results demonstrated that the sum of the valence electron number（VM） of the interface-doped metal and the valence electron number（VA） of the adsorbed intermediates in M-Ti2C followed the 10-valence electron matching ***,based on the 10-valence electron matching law,we deduced that the sum of the valence electron number（k） and VMfor the molecular adsorption intermediate interactions in M-Ti2CO2adhered to the 11-valence electron matching *** repulsion between the interface electrons in M-Ti2CO2and H2O weakened the adsorption of intermediates,Furthermore,we applied the 11-valence electron matching law to guide the design of catalysts for nitrogen reduction reaction,specifically for N2→ NNH conversion,in the *** sure independence screening and sparsifying operator algorithm was used to fit a simple three-dimensional descriptor of the adsorbate（R2up to 0.970） for catalyst *** study introduced a valence electron matching principle between doped metals（single atoms） and adsorbed intermediates（atomic and molecular） for MXene-based catalysts,providing new insights into the design of high-performance SACs.

关键词： Density functional theory Nitrogen reduction reaction Sure independence screening and sparsifying operator Valence electron matching law

A Brief Review on Mean Field Optimal Control Problem from a Linear Quadratic Perspective

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Journal of Systems Science & Complexity 2025年第01期 390-420页

作者： JIANG Xiushan HO Daniel.W.C. ZHANG Weihai college of New Energy China University of Petroleum (East China) Department of Mathematics City University of Hong Kong college of Electrical Engineering and automation Shandong University of Science and Technology

This paper reviews the mean field social(MFS) optimal control problem for multi-agent dynamic systems and the mean-field-type(MFT) optimal control problem for single-agent dynamic systems within the linear quadratic(LQ) framework. For the MFS control problem, this review discusses the existing conclusions on optimization in dynamic systems affected by both additive and multiplicative noises. In exploring MFT optimization, the authors first revisit researches associated with single-player systems constrained by these dynamics. The authors then extend the proposed review to scenarios that include multiple players engaged in Nash games, Stackelberg games, and cooperative Pareto games. Finally, the paper concludes by emphasizing future research on intelligent algorithms for mean field optimization, particularly using reinforcement learning method to design strategies for models with unknown parameters.

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