A5103098656- Nonlinear Dynamics and Pattern Formation
- stochastic dynamics and bifurcation
- Chaos control and synchronization
- Cardiac electrophysiology and arrhythmias
- Quantum chaos and dynamical systems
- Neural dynamics and brain function
- Chaos-based Image/Signal Encryption
- Quantum optics and atomic interactions
- Nonlinear Photonic Systems
- Fluid Dynamics and Turbulent Flows
- Intermetallics and Advanced Alloy Properties
- Cellular Automata and Applications
- Aluminum Alloys Composites Properties
- Neural Networks and Applications
- Stability and Controllability of Differential Equations
- Lattice Boltzmann Simulation Studies
- Advanced ceramic materials synthesis
- Geoscience and Mining Technology
- Neural Networks Stability and Synchronization
- Cardiovascular Health and Disease Prevention
- Radiation Detection and Scintillator Technologies
- Sensorless Control of Electric Motors
- Slime Mold and Myxomycetes Research
- Magnetic Bearings and Levitation Dynamics
- Advanced Algorithms and Applications
Guangxi Normal University
2003-2023
China Jiliang University
2023
Hunan University of Science and Technology
2004-2021
Northwestern University
2011-2012
Beijing Normal University
2003-2007
Xiangtan University
2003
Xiaomi (China)
2000
A one-way-coupled chaotic map lattice is proposed for cryptography of self-synchronizing stream cipher. The system performs basic floating-point analytical computation on real numbers, incorporating auxiliarily with few simple algebraic operations integer numbers. Parallel encryption (decryption) multiple sites are conducted. It observed that the has high practical security, fast speed software realization, and excellent reliability against strong channel noise, its overall cryptographic...
The influence of a spatially localized heterogeneity defect, defined by failure the diffusion effect, on spiral turbulence suppression in two-dimensional excitable media is studied numerically, based Bär model. It shown that certain parameter regions without defect can be suppressed boundary periodic forcing (called active control) if frequency properly chosen. However, with sufficiently large this control method no longer works due to wake following defect. We suggest an auxiliary enclosing...
Abstract In 2021, the Institute of High Energy Physics proposed a design glass scintillator coupled with SiPM as new solution for next generation calorimeter, to explore application scintillators in high energy physics and nuclear radiation detection. The Large Area Glass Scintillator Collaboration Group was established research develop density, light yields fast decay time. Through continuous optimization, glasses have excellent scintillation performance yield 1000 ph/MeV density 6 g/cm 3 ....
The synchronization is investigated in a two-dimensional Hindmarsh-Rose neuronal network by introducing global coupling scheme with time delay, where the length of delay proportional to spatial distance between neurons. We find that always disturbs network. When both strength and per unit (i.e., enlargement factor) are large enough, induces abnormal membrane potential oscillations Specifically, for symmetrically placed neurons form an antiphase, so factor lead desynchronization complete...
Alkali-silica reaction (ASR) is a deleterious in concrete. Significant ASR damage could undermine the durability of concrete structures and may result reduced service life. Several nondestructive techniques based on ultrasound have been used to assess damage. It has shown that nonlinear more sensitive internal stresses as well micro-cracks induced by In this investigation, we developed co-linear wave mixing method for assessing By two longitudinal waves, new with lower frequency generated....
The fibrillar protein deposits of the human islet amyloid polypeptide (hIAPP) in pancreatic Langerhans are pathological hallmark type II diabetes. Extensive experimental studies have revealed that oligomeric formations hIAPP more toxic than mature fibrils. Exploring conformations early aggregation state is valuable for effective therapeutics. In this work, using all-atom explicit-solvent replica exchange molecular dynamic (REMD) simulations, we investigated structural features and assembly...
摘要 本文以LuoRudy91模型为基础,研究心脏组织中的螺旋波和时空混沌的抑制.提出应用钙离子通道激动剂来提高慢速内行钙离子流的最大电导率Gsi,达到抑制螺旋波和时空混沌的目的.研究结果表明:该方法可以有效抑制心脏组织中的螺旋波和时空混沌,即使系统出现含时外行钾离子流的最大电导率GK分布不均匀,该控制方法仍然有效.对控制机理进行了分析. 关键词: 螺旋波 / 时空混沌 钙离子流 Abstract Suppression of spiral waves and spatiotemporal chaos in cardiac tissue has been considered based on the LuoRudy 91 model. To suppress chaos, control strategy which employs calcium channel agonist to enhance maximum conductivity slow inward current is proposed. The numerical results show that...
Suppression of spiral waves and spatiotemporal chaos are considered based on the LuoRud91model. We apply local feedback to suppress wave chaos. Two control strategies proposed, namely static moving methods. It is found that when related parameters properly chosen can be suppressed by controller, whereas cannot effectively. However, effectively controller. The corresponding speed depends traveling Spiral in a short time suitably chosen.
Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation M. Liu, G. Tang, L. J. Jacobs, Qu; MEASURING ACOUSTIC NONLINEARITY BY COLLINEAR MIXING WAVES. AIP Conf. Proc. 23 June 2011; 1335 (1): 322–329. https://doi.org/10.1063/1.3591871 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Dropdown...
Abstract Precision measurements of properties the Higgs, W and Z bosons are key scientific goals at future e + - Higgs factories. A main challenge for these is to fulfill an unprecedented jet energy resolution, design hadronic calorimeter (HCAL) found be one most important factors. The conceptual high-granularity glass scintillator (GSHCAL) has been proposed recently, which can achieve a Boson Mass Resolution (BMR) around 3.38% with initial parameter configuration show great potential...
The simple model of discrete excitable medium is applied. In order to make spiral wave meander，we introduce some death cells and fatigue into a homogeneous medium，respectively，or periodically change the excitation threshold cells. By monitoring fraction cells，we find that there remarkable common feature for meandering induced by different factors，i.e.，the under smaller than stable wave，which indicates low excitability related number in medium，and periodical cells，respectively. numerical...
The Br model is considered. influence of the defect, defined by failure diffusion effect, on dynamics spiral wave investigated introducing in to system some defects. These defects are uniformly distributed. It was found numerically that these can lead reduction excitability medium and speed. When number large enough, induce meandering or breakage an originally stable wave. On other hands, yet cause unstable become a rigidly rotating phenomenon Doppler effect causes break up into co-existing...
Cardiac memory effect, which exhibits the time-delayed coupling of membrane voltage, is introduced into Luo-Rudy phase I cardiac model. The effect on spiral waves investigated. numerical results show that can lead to irregular meandering waves. When delay-time properly chosen, increase strength causes decrease wave frequency. If exceeds critical value, in disappearances both and spatiotemporal chaos system because time-dependent potassium ion current over suppressed by memory.
The dynamics of spiral wave in a three-layer excitable medium with circular feedback coupling is studied, based on the Bär model. numerical results show that drifting or meandering waves subsystems can be observed when strength small. When slightly big, interaction between may cause some to move out boundaries subsystems. return rest state. In addition, generate transition from state target turbulence states phenomenon asymptotic subsystem depends initiation condition observed. With further...
Flow turbulence control in two-dimensional Navier–Stokes equation is considered. By applying local pinning only to a single component of flow velocity field, the can be controlled desirable targets. It found that with certain number controllers there exist an optimal strength at which error takes minimum value, and larger smaller strengths give worse efficiency. The physical mechanism underlying these strange results analysed based on interactions between different types modes.
Unidirectional linear error feedback coupling of two excitable medium systems displaying spiral waves is considered. The wave in the response system thus subjected to a forcing. We find that unidirectional can lead richer behaviour than mutual coupling. dynamics depends on strength and frequency mismatch. When small, induces drift or meander forced wave. large enough, may transition from anti-target target-like generation coupled media observed for first time. Furthermore, when strong,...
The instability of the spiral wave in an excitable medium is investigated by using lattice Boltzmann method. velocity distribution system are obtained computer simulation, and discussed connection with pattern tip trajectory wave. We find that particle at rotating center changes periodically, while change this particles quickened then becomes random when unstable, which leads to decomposition group velocity. falls into spatiotemporal chaos finally.
In this paper, the effects of aging and systole heart on dynamics spiral wave are studied by using Greenberg-Hasting cellular automaton model. model neighbor radius excitation threshold increased in order to simulate heart, is changed alternately diastole. The results show that can induce some influences wave, such as make meandering, even cause disappear; addition, it shorten wavelength keep period fixed, also elongate increase wave. If regular take place at same time, we observe phenomena,...
In order to enhance the encryption speed and secrecy of current chaotic secure communication system,a scheme digital based on stream cipher produced by real-time synchronization is presented. A improved cellular automata used for in while expanded key technology confusion are adopted. Numerical results show that can produce good pseudo-randomness ciphers it has very fast speeds decryption high anti-attack ability.
The synchronization of a two-dimensional (2D) neuronal network is investigated, based on the dynamical model Hindmarsh-Rose neuron. In order to know effects different types coupling network, we propose three schemes. They are general feedback coupling, hierarchical couplings with and without local mean field. numerical results show that when neighbor strength small, field can achieve global synchronizations whereas cannot synchronization. Different generate patterns in corresponding so...
The control of spiral waves in three-layer coupled excitable media is studied by using the Bär model. bidirectional coupling between adjacent layers adopted. We use planar generated a local periodic signal added to second layer eliminate media. numerical results show that when couplings among three meet some conditions can be controlled. may achieved complementary strategy. interaction wave and low-frequency produce high-frequency wave, leading failure waves. There exists an optimal drive...