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Neural Network-Based Switching Output Regulation Control for High-Speed Nano-Positioning Stages 认领 引用 被引量：1
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作者 Hongwei Sun Ning Xing +4 位作者 Jiayu Zou Yuqi Rong Yang Shi Han Ding Hai-Tao Zhang 《Engineering》 SCIE EI CSCD 2026年第2期227-235,共9页
This study establishes a high-speed nano-positioning stage composed of a symmetrically driven structure with multiple parallel-bonded thin piezoelectric ceramic layers capable of performing micro-or nanoscale manipula... This study establishes a high-speed nano-positioning stage composed of a symmetrically driven structure with multiple parallel-bonded thin piezoelectric ceramic layers capable of performing micro-or nanoscale manipulations.Accordingly,a neural-network-based switching output regulation controller(NNSORC)was developed to compensate for the associated hysteresis nonlinearity.To address the challenges of slow floating-point computation speeds and low compilation efficiency,a closed-loop control system with a field-programmable gate array–central processing unit(FPGA–CPU)dual-layer data-processing framework was developed.A feedback linearization method was designed to linearize the hysteresis nonlinearity of the framework,resulting in a switching-tracking error system.With the assistance of Lyapunov theory and an average dwell time technique,sufficient conditions were derived to ensure the asymptotic stability of the NN-SORC governing closed-loop system using the switching reference signals often encountered in realistic micro-ano-scale detection and manufacturing processes.Finally,extensive comparative experiments were conducted to verify the effectiveness and superiority of the proposed NN-SORC scheme. 展开更多
关键词 High-speed nano-positioning stage Switched system Intelligent control Output regulation control
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Dynamic improvement and reliability enhancement of a high speed on/off valve based on pre-excitation soft switching control 认领 引用 被引量：1
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作者 Qi ZHONG Weihang ZHOU +3 位作者 Enguang XU Junxian WANG Xiaohang SHAN Huayong YANG 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2026年第2期582-592,共11页
High Speed on/off Valve(HSV)is an essential component in Aerospace Digital Hydraulic Systems(ADHS),which impose stringent requirements on the dynamic performance and reliability of HSV due to the extreme application e... High Speed on/off Valve(HSV)is an essential component in Aerospace Digital Hydraulic Systems(ADHS),which impose stringent requirements on the dynamic performance and reliability of HSV due to the extreme application environments.However,the faster dynamic leads to increased impact between the spool and valve body,causing severe vibration and wear,which creates a conflict between rapid dynamic and high reliability.To address this problem,a Pre-Excitation Soft Switching Control(PESSC)with both pre-excitation and reverse deceleration functionalities is proposed.The initial current is optimized through pre-excitation to accelerate the opening time,while the application of reverse voltage hastens the decline of electromagnetic force,thereby reducing the spool velocity.The PESSC simultaneously achieves both faster dynamic performance and smaller impact velocity.Moreover,the optimal deceleration voltage parameters are obtained through multi-objective optimization.Experimental results demonstrate that the optimized PESSC shortens the opening time from 2.22 ms to 1.65 ms,reduces the impact velocity by 58.3%,and lowers wear by 55.4%.These findings underline the huge potential of PESSC in enhancing the dynamic performance and reliability of HSVs,offering promising applications in aerospace. 展开更多
关键词 Dynamic response High speed on/off valve Impact velocity Multi-objective optimization Pre-excitation Soft switching
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Bumpless Transfer Control for State-Dependent Switched Linear Systems With Dwell-Time Constraints 认领 引用
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作者 Feiyue Wu Jie Lian Dong Wang 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2026年第6期1353-1361,共9页
This paper investigates the robust bumpless transfer(BT)control problem for a class of state-dependent switched linear systems.To reduce control bumps in switched systems,a state-dependent switching law with a specifi... This paper investigates the robust bumpless transfer(BT)control problem for a class of state-dependent switched linear systems.To reduce control bumps in switched systems,a state-dependent switching law with a specified dwell-time constraint is proposed.Combined with BT performance requirements,BT control is designed to incorporate both transitiondependent control and stabilizing control.In contrast to previous interpolation-based BT control design schemes,the proposed structure decouples the controller evaluation period from the dwell-time constraints,thereby enhancing flexibility in BT control design.Through the construction of transition-dependent Lyapunov functions,sufficient conditions are established to guarantee the exponential stability and BT performance for the switched system.The proposed method is extended to disturbed switched systems with a guaranteed L2-gain upper bound.To demonstrate the effectiveness of the proposed BT control strategy,an example featuring an aero-engine model is presented. 展开更多
关键词 Bumpless transfer (BT) control dwell-time constraint state-dependent switching switched systems
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Security stabilization for switched systems via dynamic sampling strategies 认领 引用
4
作者 Yuanshan Liu Jinjiang Li Yude Xia 《Journal of Automation and Intelligence》 EI CSCD 2026年第2期166-171,共6页
This paper investigates the problem of state feedback stabilization for a class of planar switched nonlinear systems(PSNSs)subject to Denial-of-Service(DoS)attacks.By incorporating a technique that adding a power inte... This paper investigates the problem of state feedback stabilization for a class of planar switched nonlinear systems(PSNSs)subject to Denial-of-Service(DoS)attacks.By incorporating a technique that adding a power integrator and developing switched dynamic event-triggered mechanisms(SDE-TMs),a continuous state feedback stabilizer is constructed.The SDE-TMs are intelligently designed by selecting appropriate parameters.The novelty of the proposed scheme lies in its unified design,which enables steady state feedback stabilization for PSNSs under DoS conditions,without necessitating any modifications to the controller gain parameters.Finally,one simulation is expressed to verify the effectiveness of the proposed algorithm. 展开更多
关键词 Planar switched nonlinear systems Dynamic switched event-triggered mechanisms Denial-of-Service attacks State feedback stabilizer Arbitrary switching
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Switched model predictive control with non-uniform penalty for switched systems 认领 引用
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作者 Feiyue Wu Jie Lian Wei Wang 《Control Theory and Technology》 EI CSCD 2026年第2期260-270,共11页
This paper presents a switched model predictive control(MPC)with non-uniform penalty for discrete-time constrained switched linear systems.A non-uniform time-varying stage cost penalty is incorporated to reduce the re... This paper presents a switched model predictive control(MPC)with non-uniform penalty for discrete-time constrained switched linear systems.A non-uniform time-varying stage cost penalty is incorporated to reduce the required prediction horizon while guaranteeing closed-loop stability.To address feasibility challenges arising from mode-dependent state constraints,switching invariant sets are constructed to ensure persistent feasibility under minimal dwell-time constraints.Explicit conditions on dwell time,weighting parameters,and penalty rates are derived to guarantee asymptotic stability of the closedloop system.Furthermore,an algorithm for computing the maximal switching invariant sets is developed.The proposed method is validated through a vehicle longitudinal control case study,demonstrating its effectiveness and computational efficiency. 展开更多
关键词 Switched system Model predictive control Switching invariant set Dwell-time constraint
String stability of disturbed switched vehicle platoon systems via robust event-triggered mechanism 认领 引用
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作者 Jiansong Chen Liwei Xu +2 位作者 Yan Wang Xianjian Jin Guodong Yin 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2026年第3期376-385,共10页
This paper investigates the robust event-triggered control problem for vehicle platooning with a discrete event-triggered communication scheme.The communication topology of the vehicle platoon is described by a direct... This paper investigates the robust event-triggered control problem for vehicle platooning with a discrete event-triggered communication scheme.The communication topology of the vehicle platoon is described by a directed graph,and the packet loss process is modeled as a Markov chain.Considering the time delay and air resistance,a variable gain distributed controller is designed based on the event-triggered mechanism.By constructing an appropriate Lyapunov–Krasovskii functional and applying the stability theory of Markov jump systems and H∞ control method,sufficient conditions are derived to guarantee the ℒ2 stochastic string stability of the vehicle platoon.Furthermore,the upper bound of the H∞ performance index is obtained,which reflects the disturbance attenuation level of the platoon.Finally,simulation results are provided to demonstrate the effectiveness of the proposed control protocol. 展开更多
关键词 Vehicle platoon Robust event-triggered mechanism Switching topologies Disturbance String stability
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Comprehensive evaluation on Si/SiC hybrid switch including single-pulse avalanche and short-circuit robustness 认领 引用
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作者 Hang-Zhi Liu Yu-Ming Zhou 《Journal of Electronic Science and Technology》 EI CAS CSCD 2026年第1期86-98,共13页
In this paper,a comprehensive evaluation on the silicon/silicon carbide(Si/SiC)hybrid switch is performed through experimental tests in terms of both electrical performance and robustness under extreme stresses.Based ... In this paper,a comprehensive evaluation on the silicon/silicon carbide(Si/SiC)hybrid switch is performed through experimental tests in terms of both electrical performance and robustness under extreme stresses.Based on the optional turn-on and turn-off delay times under the efficiency control mode obtained from the double-pulse test(DPT),both nondestructive and destructive single-pulse avalanche tests are conducted on the Si/SiC hybrid switch as well as on the two discrete device branches inside the hybrid switch.In addition,the avalanche voltage,critical avalanche energy,and peak avalanche current,which intrinsically characterize the unclamped-inductive-switching(UIS)avalanche characteristics,are carefully examined.In this way,the physical factors dominating the UIS characteristics of the hybrid switch,thus limiting its single-pulse avalanche withstand capability,are specifically and comprehensively identified;the underlying physical mechanisms are analyzed and revealed in depth,and how the gate control sequence affects the UIS characteristics of the hybrid switch is extensively investigated.We additionally carry out short-circuit(SC)tests under the fault-under-load(FUL)condition and perform a parallel in-depth analysis to experimentally determine which branch dominates the SC withstand capability of the hybrid switch.Our experimental study indicates that,for both SC robustness and single-pulse avalanche capability,the limiting factor is a single device branch among the two parallel discrete devices,and the UIS behavior is sensitive to the variation of the gate turn-off delay time Toff_delay.The study conducted in this paper not only provides deep academic insights into the electrical performance and reliability of the Si/SiC hybrid switch,but also offers fundamental theoretical principles and technical evidence to support its more efficient and long-term reliable applications of the hybrid switch in the industrial fields. 展开更多
关键词 Gate switching delay Hybrid switch Si/SiC Single-pulse avalanche Short-circuit
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Dynamic balance and reliability of a stochastic ecosystem with Markov switching 认领 引用
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作者 Ya-Nan Sun Xin-Zhi Liu You-Ming Lei 《Chinese Physics B》 SCIE EI CAS CSCD 2026年第1期381-390,共10页
A stochastic predator-prey system with Markov switching is explored.We have developed a new chasing technique to efficiently solve the Fokker-Planck-Kolmogorov and backward Kolmogorov equations.Dynamic balance and rel... A stochastic predator-prey system with Markov switching is explored.We have developed a new chasing technique to efficiently solve the Fokker-Planck-Kolmogorov and backward Kolmogorov equations.Dynamic balance and reliability of the switching system are evaluated via stationary probability density function and first-passage failure theory,taking into account factors such as switching frequencies,noise intensities,and initial conditions.Results reveal that Markov switching leads to stochastic P-bifurcation,enhancing dynamic balance and reducing white-noise-induced oscillations.But frequent switching can heighten initial value dependence,harming reliability.Further,the influence of the subsystem on the switching system is not proportional to its action probabilities.Monte Carlo simulations validate the findings,offering an in-depth exploration of these dynamics. 展开更多
关键词 stochastic ecosystem Markov switching first-passage failure reliability
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Domain Switching in Relaxed Tetragonal-Phase Ferroelectric Single Crystals Under Nanoindentation 认领 引用
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作者 Guian Man Changjun Qi +3 位作者 Yujuan Peng Jiawei Wang Yixuan Jiang Xingzhe Wang 《Acta Mechanica Solida Sinica》 SCIE EI CSCD 2026年第3期291-297,共7页
Relaxor ferroelectric single-crystal materials have attracted extensive attention because of their extremely high piezoelectric and electromechanical coupling properties,but research on their mechanically induced doma... Relaxor ferroelectric single-crystal materials have attracted extensive attention because of their extremely high piezoelectric and electromechanical coupling properties,but research on their mechanically induced domain switching properties under different strain rates is still lacking.In this paper,the domain switching dynamics exhibited by the PMN-0.36PT relaxor ferroelectric single crystal(with a tetragonal phase structure)under nanoindentation with variable strain rates are investigated via transmission electron microscopy in combination with the phase-field method.The microstructural material changes observed through transmission electron microscopy show that the T phase of the relaxor ferroelectric material undergoes 90°domain switching under nanoindentation.The results of a phase-field simulation involving nanoindentation with different strain rates further show that the T phase of the relaxor ferroelectric material undergoes 90°domain switching,the domain wall moves,and the original domain becomes wider directly under the indenter.Moreover,there is no correlation between the domain switching and loading rates.The phase-field simulation results are consistent with the experimental results,providing new insights into the mechanical force regulation properties of domain switching in relaxor ferroelectric materials. 展开更多
关键词 Domain switching Transmission electron microscopy Nanoindentation Phase-field method Relaxor ferroelectrics
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Robust self-triggered switching control of autonomous ground vehicles with varying linear parameters 认领 引用
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作者 Yuanlong XIE Shuting WANG +3 位作者 Liquan JIANG Hu LI Hao WU Sheng-quan XIE 《Journal of Zhejiang University-SCIENCE A》 SCIE EI CAS CSCD 2026年第5期453-465,I0001-I0007,共13页
We propose a robust self-triggered switching control scheme for four-wheel-steering autonomous ground vehicles(FAGVs)to enhance tracking precision in the face of significant parameter variations.First,using the polyto... We propose a robust self-triggered switching control scheme for four-wheel-steering autonomous ground vehicles(FAGVs)to enhance tracking precision in the face of significant parameter variations.First,using the polytopic mechanism,the nonlinear dynamics of an FAGV are formulated as a switched linear parameter-varying system to accommodate parametric perturbations.With suitable dwell time,a novel self-triggered switching law is designed using energy density in terms of the tracking accuracy and system robustness;this satisfies the required control criteria while also preventing the Zeno phenomenon caused by traditional high-frequency switching.Through the application of multiple parameter-correlated Lyapunov functions,the resultant closed-loop system is ensured to be asymptotically stable with suitable auto-tuned gains.Finally,the efficacy and superiority of the proposed method are verified through experiments with an FAGV system. 展开更多
关键词 Varying linear parameters Autonomous ground vehicle Switching controller Zeno avoidance Robust control
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A Novel Segment-switching Strategy with the Current Transient Overshoot Suppression for Segmented Long-stator Linear Motor 认领 引用
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作者 Yanfei Li Zixin Li +4 位作者 Hang Zhang Fei Xu Cong Zhao Fanqiang Gao Yaohua Li 《CES Transactions on Electrical Machines and Systems》 EI CSCD 2026年第2期188-203,共16页
The segmented power supply scheme for long-stator linear motor facilitates reducing power capacity and achieving a high power factor.However,the segment-switching process leads to overcurrent under high-speed conditio... The segmented power supply scheme for long-stator linear motor facilitates reducing power capacity and achieving a high power factor.However,the segment-switching process leads to overcurrent under high-speed conditions.This paper proposes a novel segment-switching strategy based on the time-optimal control theory.It employs time-optimal feedforward voltage and planned current trajectory during the switching transient process.Thus,it ensures rapid disconnection of the exiting segment and rapid establishment of the current in the incoming segment,while suppressing transient current overshoot.The mathematical model of the long-stator linear motor is established in the process of segment-switching.It derives the minimum times required to force the exiting segment current to zero and to establish the incoming segment current to the reference value by time-optimal control theory.Furthermore,the time-optimal voltages and current trajectories are calculated.The timeoptimal current trajectories are used as the reference command for the current loop.The time-optimal feedforward voltages are introduced into the current loop control.Hence,it achieves rapid disconnection of the exiting segment and fast,accurate establishment of the incoming segment current.Experimental and simulation results collectively validate the effectiveness of the proposed segment-switching strategy. 展开更多
关键词 Long-stator linear motor Segmented power supply Segment switching Longitudinal static end-effect Timeoptimal control
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Phonon-assisted absorption photoconductive switch 认领 引用
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作者 Zhao Wang Lixin Zhang +8 位作者 Lu Cheng Danwen Zhang Yu Lu Naiji Zhang Xin Zhang Duanyang Chen Zhan Sui Hongji Qi Wei Zheng 《Opto-Electronic Science》 CAS 2026年第5期1-10,I0001,I0002,共10页
High-power microwave technology shows great promise for applications in low-altitude security systems such as countering non-cooperative unmanned aerial vehicles.However,conventional high-power photoconductive semicon... High-power microwave technology shows great promise for applications in low-altitude security systems such as countering non-cooperative unmanned aerial vehicles.However,conventional high-power photoconductive semiconductor switches(PCSSs)based on impurity absorption intrinsically fail to achieve high voltage conversion efficiency across different operating voltages,limiting their overall performance.Here,we propose a novel PCSS based on phonon-assisted absorption,which fundamentally breaks the efficiency bottleneck and enables voltage conversion efficiency close to the theoretical limit.Using gallium oxide(Ga2O3),we successfully fabricate this phononassisted Ga2O3 PCSS,demonstrating a voltage conversion efficiency of 90.25%at an excitation laser energy of 1.98 mJ and a bias voltage of 600 V,as well as a conversion efficiency of 98.93%and a maximum output power density of 17.7 MW/cm2 at a bias voltage of 4000 V.This work provides a new principle and technical route for designing and fabricating high-performance high-power photoconductive switches,significantly advancing the development of high-efficiency,high-power microwave systems. 展开更多
关键词 high-power photoconductive semiconductor switch phonon-assisted absorption gallium oxide highpower microwave low-altitude security
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Fixed-Time and Predefined-Time Synchronization of Inertial Memristive Neural Networks With Proportional Delay and Mismatched Switching Jumps via Stochastic Particle Swarm Optimization 认领 引用
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作者 Qiang Lai Jun Wang +1 位作者 Leimin Wang Minghong Qin 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2026年第6期1274-1287,共14页
This paper studies the fixed-time synchronization(FxTS)and predefined-time synchronization(PTS)of a class of inertial memristive neural networks(IMNNs),which have unbounded proportional delay independent of time linea... This paper studies the fixed-time synchronization(FxTS)and predefined-time synchronization(PTS)of a class of inertial memristive neural networks(IMNNs),which have unbounded proportional delay independent of time linearity and mismatched switching jump coefficients.Based on Filippov solution theory and Lyapunov methods,this work develops an enhanced FxTS criterion delivering a tighter upper bound on convergence time and thereby extending guaranteed fixed-time behavior to a wider range of networks.A refined PTS condition that incorporates additional state-dependent terms accelerates error decay and reduces conservatism during the transient response.Numerical simulations show that the convergence rate of PTS under this strategy is significantly improved.Moreover,an optimization model with minimum control energy and dynamic error as objective functions is proposed to obtain more accurate controller parameters,and the stochastic inertia weight particle swarm optimization(SIWPSO)algorithm is introduced to solve the optimization model.Numerical studies not only validate the theoretical results for both FxTS and PTS but also demonstrate a secure communication application in which the chaos of the IMNNs acts as a masking carrier and enables perfect encryption and decryption of a complex test signal through SIWPSO-optimized FxTS and PTS. 展开更多
关键词 Fixed-time synchronization predefined-time synchronization inertial memristive neural networks proportional delay mismatched switching jumps stochastic particle swarm optimization
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Improved Three-Vector Model Predictive Current Control Strategy for Fixed Switching Frequency on a Grid-Connected Inverter 认领 引用
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作者 Hongsheng Su Dan Li Yuwei Du 《Energy Engineering》 EI 2026年第5期401-415,共15页
When the three-phase grid-connected inverter system is in operation,there are problems of significant switching losses and power losses.At the same time,if the switching frequency is not fixed,it will lead to problems... When the three-phase grid-connected inverter system is in operation,there are problems of significant switching losses and power losses.At the same time,if the switching frequency is not fixed,it will lead to problems such as a high content of low-order harmonics in the current on the grid side.This paper takes the three-phase grid-connected inverter as the research object and proposes a solution.Establish a mathematical model for the inverter system and analyze the transformation relationships of relevant electrical quantities across different coordinate systems.First,the paper proposes an improved three-vector model predictive current control algorithm.It employs an orthogonal-axis current zero-crossing method to calculate vector action times,enabling rapid and efficient determination of the desired sector.Then,based on this,an optimized switching sequence method is proposed.It fixes the switching frequency by adding a constraint term to the objective function.Finally,the effectiveness of the proposed method was validated through simulation and experimental results.The results demonstrate that the proposed control strategy optimizes the switching sequence and achieves fixed switching frequency control.It can effectively reduce switching losses and power losses,thereby lowering the harmonic content in the grid-connected side current.At the same time,the grid-connected current exhibits low harmonic content and minimal current ripple.Concurrently,the grid-connected current exhibits low harmonic content and minimal current ripple.Under dynamic conditions,it maintains high current tracking accuracy and demonstrates strong system robustness. 展开更多
关键词 Photovoltaic grid-connected system inverter model predictive control switching frequency harmonic analysis
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Slow light and absorption switchable terahertz metamaterials based on vanadium dioxide phase transformation properties 认领 引用
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作者 Hui HU Chengju MA +3 位作者 Jirui WU Tingyu LI Xin GONG Yueshen WANG 《Optoelectronics Letters》 EI 2026年第6期344-349,共6页
Versatile switchable terahertz devices have important applications in the field of terahertz technology,but it is currently difficult to implement them in a single device.In order to realize the switching between slow... Versatile switchable terahertz devices have important applications in the field of terahertz technology,but it is currently difficult to implement them in a single device.In order to realize the switching between slow light and absorbing functions,a slow light and absorption switchable terahertz metamaterial based on the phase transition characteristics of vanadium dioxide(VO2)is designed,which is composed of a top layer of aluminum(Al)square ring and a ring resonant unit,a middle layer of SiO2 and a bottom layer of VO2.Based on the electromagnetic field theory,the finite time domain difference(FDTD)method is used to simulate and analyze the optical properties of VO2 in two states.When VO2 is in the insulating state,the metamaterial can achieve a slow light effect with a maximum group delay of 2.85 ps,and when VO2 is in the metallic state,the absorption rate of the metamaterial can reach 88.5%at 0.287 THz and 99.95%at 0.597 THz.We simulate the temperature-controlled phase transition process of VO2 by changing the conductivity of VO2,which can achieve the switching of slow light and absorption functions.In addition,we also found that the material is polarization insensitive.The metamaterial we have designed has some value in the research of terahertz multifunctional devices. 展开更多
关键词 phase transition characteristics terahertz metamaterial terahertz devices Vanadium dioxide ring resonant unita Phase transition Absorption switchable switching slow light absorbing functionsa
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Zigzag domain walls unravel the polarization switching puzzle in wurtzite ferroelectrics 认领 引用
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作者 Hang Zang Zhiming Shi +1 位作者 Xiaojuan Sun Dabing Li 《Journal of Semiconductors》 EI CAS CSCD 2026年第6期33-36,共4页
In the past decade,the discovery of robust ferroelectricity in scandium-doped aluminum nitride(Al1−xScxN)[1]has ignited a new wave of research in the semiconductor community.Unlike traditional perovskite ferroel... In the past decade,the discovery of robust ferroelectricity in scandium-doped aluminum nitride(Al1−xScxN)[1]has ignited a new wave of research in the semiconductor community.Unlike traditional perovskite ferroelectrics(such as PbZrTiO3 or PZT)[2],wurtzite-structured materials are fully compatible with modern CMOS fabrication processes[3]. 展开更多
关键词 cmos fabrication processes zigzag domain walls scandium doped aluminum nitride wurtzite ferroelectrics semiconductor community robust ferroelectricity perovskite ferroelectrics such polarization switching
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Epigenetic Tuning of TSC:A Metabolic Master Switch for Human Neocortical Expansion 认领 引用
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作者 Jun-Wei Cao Yinghui Fu 《Neuroscience Bulletin》 SCIE CAS CSCD 2026年第6期1433-1436,共4页
The dramatic expansion of the human neocortex,roughly three times larger than our closest primate relatives,underlies our distinctive cognitive capabilities.Central to this expansion are upper-layer cortical neurons(l... The dramatic expansion of the human neocortex,roughly three times larger than our closest primate relatives,underlies our distinctive cognitive capabilities.Central to this expansion are upper-layer cortical neurons(layers 24),which form intricate cortico-cortical circuits underlying language,abstract reasoning,and complex social behavior[1].During cortical development,radial glial cells(RGCs)—the primary neural progenitor cells in the ventricular zone-transition from self-renewing divisions to asymmetric divisions that generate both neurogenic intermediate progenitors(IPs)and neurons.These IPs are capable of undergoing symmetric divisions,thereby contributing to cortical neuron production,and a majority of them are destined to become upper-layer neurons[2]. 展开更多
关键词 radial glial cells human neocortical expansion metabolic master switch complex social behavior cortical developmentradial glial cells rgcs epigenetic tuning asymmetric div TSC
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A stretchable liquid metal switch for interactive and autonomous soft machines 认领 引用 被引量：1
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作者 Gangsheng Chen Biao Ma +6 位作者 Yanjie Chen Yakun Gao Heng Zhang Wuxing Zhang Duxin Chen Wenwu Yu Hong Liu 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2026年第1期794-807,共14页
Soft machines harness material-level physical intelligence to perform adaptive tasks,enabling advancements in biomedical and human-machine interaction fields.Soft switches are the basic building blocks to achieve inte... Soft machines harness material-level physical intelligence to perform adaptive tasks,enabling advancements in biomedical and human-machine interaction fields.Soft switches are the basic building blocks to achieve intelligent functions like autonomous decisions and mechanical computation.However,current soft switches suffer from complex fabrication processes,limited performance,and a lack of multimodal control,which hinder their practical application and the realization of machine intelligence.Herein,by harnessing the unique self-pinch and self-healing effects of the gallium-based liquid metals(LMs),we describe a soft high-performance electric switch composed of an LM line encapsulated within an elastomer.Applying pressure to deform the LM switch can increase local current density,leading to the electromagnetic self-pinch effect for switching off.After releasing pressure,the LM can spontaneously heal with the elastic recovery of the elastomer for switching on.This LM switch shows comprehensive advantages,including a compact design(0.5 mm×1.5 mm×10 mm),good stretchability(100%),high on/off ratio(~109),rapid response time(12000 cycles).Moreover,the LM switches enable multiple control modes,including magnetic and optical stimulation,through the integration of responsive materials.We demonstrate various LM switch-enabled functional soft machines,such as an interactive flexible gripper,a self-oscillating soft crawler,and wearable logic gates.This work will open new avenues for the application of LM in intelligent soft machines and advanced wearable electronics. 展开更多
关键词 liquid metal soft switches electric breakdown liquid crystal elastomer soft machines
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Adaptive Fault-Tolerant Consensus Tracking Control for Nonlinear Multi-Agent Systems With Double Semi-Markovian Switching Topologies and Unknown Control Directions 认领 引用 被引量：1
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作者 Chao Zhou Zehui Mao +1 位作者 Bin Jiang Xing-Gang Yan 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2026年第2期463-476,共14页
This paper is concerned with adaptive consensus tracking control of nonlinear multi-agent systems with actuator faults and unknown nonidentical control directions under double semi-Markovian switching topologies.Consi... This paper is concerned with adaptive consensus tracking control of nonlinear multi-agent systems with actuator faults and unknown nonidentical control directions under double semi-Markovian switching topologies.Considering the complex working environment and the stability differences in communication links between leaders and followers,a double semi-Markov process is first introduced to describe the random switching of communication topologies in the leader-follower structure.In order to address challenges from the unknown nonidentical control directions and partial loss of effectiveness actuator faults,a completely independent parameter is introduced into the Nussbaum function to overcome the inherent obstacle of mutual cancellation and avoid the rapid growth rate.Considering only the state information of agents is transmitted among the agents,an adaptive distributed fault-tolerant consensus tracking control is proposed based on the double semi-Markovian switching topologies using the designed Nussbaum function.Furthermore,the stability of the closed-loop nonlinear multi-agent systems is analyzed using contradiction argument and Lyapunov theorem,from which the asymptotic consensus tracking in mean square sense can be obtained.A numerical simulation example is provided to verify the effectiveness of the proposed algorithm. 展开更多
关键词 Adaptive control consensus tracking double semi-Markovian switching topologies fault-tolerant control Nussbaum function unknown nonidentical control directions
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Bumpless Transfer Filtering for Continuous-Time Switched Systems With Admissible Dual-Modal Persistent Dwell-Time 认领 引用
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作者 Jian Zhang Yanzheng Zhu +2 位作者 Rongni Yang Xinkai Chen Donghua Zhou 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2026年第6期1392-1408,共17页
This paper investigates the issue of bumpless transfer H∞ filtering for a class of continuous-time switched linear systems.A new definition on admissible dual-modal persistent dwelltime(ADM-PDT)switching is presen... This paper investigates the issue of bumpless transfer H∞ filtering for a class of continuous-time switched linear systems.A new definition on admissible dual-modal persistent dwelltime(ADM-PDT)switching is presented,which is more general than the existing mode-dependent or admissible edge-dependent persistent dwell-time switching.To match the ADM-PDT switching,the dual-mode-dependent filter utilizing previous mode information is designed,which can enhance the performance of modedependent filter widely used in the literature.To smooth the filtering output bumps caused by switching filter,a novel dualmode-dependent bumpless transfer filter is constructed by introducing a time-interpolation-function-dependent transition filter.Then,the criteria for stability and H∞ performance analyses are derived based on a transition-dependent dual-modal Lyapunov function,ensuring that the filtering error systems driven by the bumpless transfer filter and ADM-PDT switching are globally uniformy asymptotically stable with a non-weighted H∞ noise attenuation performance.Finally,the validity and superiority of the developed theoretical results are illustrated by using a numerical example and an unmanned marine vehicle system. 展开更多
关键词 Admissible dual-modal persistent dwell-time switching bumpless transfer filter dual-mode-dependent filter nonweighted H∞ gain switched systems
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