检索结果-南通市图书馆

chaotic Synchronization of Two Electrical Coupled Neurons with Unknown Parameters Based on Adaptive Control

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2011年第5期28卷 60-63页

作者： WANG Xing-Yuan REN Xiao-Li School of Electronic and Information Engineering Dalian University of TechnologyDalian 116024

chaotic synchronization of two electrical coupled FitzHugh-Nagumo(FHN)neurons with unknown parameters via adaptive control is *** on the Lyapunov stability theory,an adaptive controller and a parameter update law are designed,which can achieve the synchronization of the two gap junction coupled FHN neurons when the individual neuron is chaotic,without considering the coupling ***,the unknown parameters are identified successfully and the controller is robust to the random *** numerical simulation results confirm the effectiveness of the designed controller.

关键词： strength chaotic chaotic

chaotic Motion Analysis for a Coupled Magnetic-Flow-Mechanical Model of the Rectangular Conductive Thin Plate

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2023年第11期137卷 1749-1771页

作者： Xinzong Wang Xiaofang Kang Qingguan Lei School of Civil Engineering Anhui Jianzhu UniversityHefei230601China Key Laboratory of Intelligent Underground Detection Technology Anhui Jianzhu UniversityHefei230601China

The chaotic motion behavior of the rectangular conductive thin plate that is simply supported on four sides by airflow andmechanical external excitation in a magnetic field is *** to Kirchhoff’s thin plate theory,considering geometric nonlinearity and using the principle of virtualwork,the nonlinearmotion partial differential equation of the rectangular conductive thin plate is *** the separate variable method and Galerkin’s method,the system motion partial differential equation is converted into the general equation of the Duffing equation;the Hamilton system is introduced,and the Melnikov function is used to analyze the Hamilton system,and obtain the critical surface for the existence of *** bifurcation diagram,phase portrait,time history response and Poincarémap of the vibration system are obtained by numerical simulation,and the correctness is *** results showthatwhen the ratio of external excitation amplitude to damping coefficient is higher than the critical surface,the system will enter chaotic *** chaotic motion of the rectangular conductive thin plate is affected by different magnetic field distributions and airflow.

关键词： Rectangular conductive thin plate chaotic airflow magnetic field Melnikov function Galerkin’s method

Robust Fractional-Order Proportional-Integral Observer for Synchronization of chaotic Fractional-Order Systems

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica Sinica 2019年第1期6卷 268-277页

作者： Ibrahima N’Doye Khaled Nabil Salama Taous-Meriem Laleg-Kirati IEEE Computer Electrical and Mathematical Sciences and Engineering Division (CEMSE)King Abdullah University of Science and Technology (KAUST)

In this paper, we propose a robust fractional-order proportional-integral(FOPI) observer for the synchronization of nonlinear fractional-order chaotic systems. The convergence of the observer is proved, and sufficient conditions are derived in terms of linear matrix inequalities(LMIs) approach by using an indirect Lyapunov method. The proposed FOPI observer is robust against Lipschitz additive nonlinear uncertainty. It is also compared to the fractional-order proportional(FOP) observer and its performance is illustrated through simulations done on the fractional-order chaotic Lorenz system.

关键词： Chaos synchronization fractional-order chaotic systems indirect Lyapunov approach linear matrix inequality(LMI) robust proportional-integral observer design

chaotic Behavior of Solitary Wave in Liquid

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 1995年第11期12卷 677-680页

作者： CHEN Weizhong WEI Rongjue WANG Benren also Institute of Modern Physics Ningbo Normal CollegeNingbo 315211 Institute of Acoustics and Laboratory of Modern Acoustics Nanjing UniversityNanjing 210093

The chaotic behaviors of the time series of the breather(soliton)amplitude have been observed experimentally in the shallow water in the trough subjected to parametric exciting *** results predict that the water solitary waves should be described by some chaotic equations in the higher order approximations as well as by the nonlinear Schördinger equation in the first order.

关键词： chaotic soliton solitary

Fractional-Order Control for a Novel chaotic System Without Equilibrium

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica Sinica 2019年第4期6卷 1000-1009页

作者： Shuyi Shao Mou Chen the College of Automation Engineering Nanjing University of Aeronautics and AstronauticsNanjing 211106China IEEE

The control problem is discussed for a chaotic system without equilibrium in this *** the basis of the linear mathematical model of the two-wheeled self-balancing robot,a novel chaotic system which has no equilibrium is *** basic dynamical properties of this new system are studied via Lyapunov exponents and Poincar′e *** further demonstrate the physical realizability of the presented novel chaotic system,a chaotic circuit is *** using fractional-order operators,a controller is designed based on the state-feedback *** to the Gronwall inequality,Laplace transform and Mittag-Leffler function,a new control scheme is explored for the whole closed-loop *** the developed control scheme,the state variables of the closed-loop system are controlled to stabilize them to ***,the numerical simulation results of the chaotic system with equilibrium and without equilibrium illustrate the effectiveness of the proposed control scheme.

关键词： chaotic system circuit implementation fractional-order stabilization

Scalable parallel ultrafast optical random bit generation based on a single chaotic microcomb

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2024年第4期13卷 637-644页

作者： Pu Li Qizhi Li Wenye Tang Weiqiang Wang Wenfu Zhang Brent ELittle Sai Tek Chu KAlan Shore Yuwen Qin Yuncai Wang Institute of Advanced Photonics Technology School of Information EngineeringGuangdong University of TechnologyGuangzhou 51006China. Key Laboratory of Photonic Technology for Integrated Sensing and Communication Ministry of Education of ChinaGuangdong University of TechnologyGuangzhou 51006China. Guangdong Provincial Key Laboratory of Information Photonics Technology Guangdong University of TechnologyGuangzhou 51006China. Key Laboratory of Advanced Transducers andIntelligent Control System Ministry of EducationTaiyuan University of TechnologyTaiyuan 030024China. State Key Laboratory of Transient Optics and Photonics Xi’an Institute of Optics and Precision MechanicsChinese Academy of SciencesXi’an 710119China. Department of Physics and Materials Science City University of Hong KongHong KongChina. School of Electronic Engineering Bangor UniversityBangorWales LL571UTUK

Random bit generators are critical for information security,cryptography,stochastic modeling,and *** and scalability are key challenges faced by current physical random bit ***,we propose a massively parallel scheme for ultrafast random bit generation towards rates of order 100 terabit per second based on a single micro-ring resonator.A modulation-instability-driven chaotic comb in a micro-ring resonator enables the simultaneous generation of hundreds of independent and unbiased random bit streams.A proof-of-concept experiment demonstrates that using our method,random bit streams beyond 2 terabit per second can be successfully generated with only 7 comb *** bit rate can be easily enhanced by further increasing the number of comb lines *** approach provides a chip-scale solution to random bit generation for secure communication and high-performance computation,and offers superhigh speed and large scalability.

关键词： resonator random chaotic

Quantifying Information Flow between Two chaotic Semiconductor Lasers Using Symbolic Transfer Entropy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2012年第3期29卷 48-51页

作者： LI Nian-Qiang PAN Wei YAN Lian-Shan LUO Bin XU Ming-Feng TANG Yi-Long Center for Information Photonics&Communications School of Information Science and TechnologySouthwest Jiaotong UniversityChengdu 610031

Symbolic transfer entropy(STE)is employed to quantify the dominant direction of information flow between two chaotic-semiconductor-laser time *** information flow in unidirectionally and bidirectionally coupled systems was analyzed *** results show that the dependence relationship can be revealed if there exists any coupling between two chaotic semiconductor *** importantly,in both unsynchronized and good synchronization regimes,the STE can be used to quantify the direction of information flow between the lasers,although the former case leads to a better *** results thus establish STE as an effective tool for quantifying the direction of information flow between chaotic-laser-based systems.

关键词： synchronization laser chaotic

Predicting Hyper-chaotic Time Series Using Adaptive Higher-Order Nonlinear Filter

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2001年第3期18卷 337-340页

作者： ZHANG Jia-Shu XIAO Xian-Ci Department of Electronic Engineering University of Electronic Science and Technology of ChinaChengdu 610054

A newly proposed method,*** adaptive higher-order nonlinear finite impulse response(HONFIR)filter based on higher-order sparse Volterra series expansions,is introduced to predict hyper-chaotic time *** effectiveness of using adaptive HONFIR filter for making one-step and multi-step predictions is tested based on very few data points by computer-generated hyper-chaotic time series including Mackey-Glass equation and 4-dimensional nonlinear dynamical system.A comparison is made with some neural networks for predicting the Mackey-Glass hyper-chaotic time *** simulation results show that the adaptive HONFIR filter proposed here is a very powerful tool for making prediction of hyper-chaotic time series.

关键词： chaotic nonlinear Nonlinear

chaotic features of the atmosphere motion near the mesopause revealed by VHF radar observation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1996年第15期41卷 1276-1280页

作者：熊建刚易帆 J.Klostermeyer R.Rüster Wuhan Institute of Physics Chinese Academy of Sciences Wuhan 430071 China Max-Planck-Institut

Many observations have revealed the complex motions of the atmosphere because of the rapid developement of experiment technique. However, as compared with numerical stimulations of atmospheric dynamic system, little is known about the complexity occurring in the real atmosphere. The chaotic motion can usually be described by 3 characteristic quantities for the dissipative motion of the atmosphere: dimension, Lyapunov exponent

关键词： VHF radar mesopause atmosphere chaotic features.