A5080568456- Mathematical and Theoretical Epidemiology and Ecology Models
- COVID-19 epidemiological studies
- Optical Systems and Laser Technology
- Adaptive optics and wavefront sensing
- Opinion Dynamics and Social Influence
- SARS-CoV-2 and COVID-19 Research
- Optical Wireless Communication Technologies
- Complex Network Analysis Techniques
- Gambling Behavior and Treatments
- Advancements in Battery Materials
- Astronomical Observations and Instrumentation
- Advanced Measurement and Metrology Techniques
- Advanced Algorithms and Applications
- FinTech, Crowdfunding, Digital Finance
- Viral Infections and Outbreaks Research
- Stock Market Forecasting Methods
- Piezoelectric Actuators and Control
- Market Dynamics and Volatility
- Financial Risk and Volatility Modeling
- Satellite Image Processing and Photogrammetry
- Evolution and Genetic Dynamics
- Fractional Differential Equations Solutions
- Advanced optical system design
- Impact of Technology on Adolescents
- Immune Cell Function and Interaction
Anhui University
2025
Yangzhou University
2024
Guilin University of Technology
2019-2023
University of Chinese Academy of Sciences
2012
Lanzhou University of Technology
2012
Abstract The hydrogen oxidation reaction (HOR) in alkaline media is pivotal for the advancement of anion exchange membrane fuel cells (AEMFCs), and development single‐atom catalysts offers a promising solution creating cost‐effective, highly efficient HOR catalysts. Although transition from nanoparticle to enhances catalytic activity, stability these sites remains significant challenge. In this study, active stable catalyst successfully designed by incorporating Ru atoms into ZrO 2‐x /C...
In this paper, we construct an online game addiction model(including susceptible, infective, professional and quitting compartments). We also consider that the direct transfer from susceptible individuals to individuals. Some properties of model are derived by basic reproduction number R0 stability all kinds equilibria is obtained. Then use Pontriagin?s maximum principle solve optimal control strategy. Finally, Numerical simulations conducted in analytic results.
In this paper, we establish a mathematical model of online game addiction with two stages to research the dynamic properties it. The existence all equilibria is obtained, and basic reproduction number calculated by method next-generation matrix. global asymptotic stability disease-free equilibrium (DFE) proved comparison principle, endemic (EE) constructing an appropriate Lyapunov function. Then use Pontryagin's maximum principle find optimal solution model, so that infected people can be...
<abstract><p>The problem of online game addiction among teenagers is becoming more and serious in many parts the world. Many them are addicted to games due lack family education, which an important factor that can not be ignored. To explore optimal strategy for controlling spread addiction, a new dynamic model teenagers' with considering education developed. Firstly, we perform qualitative analysis model. We study nonnegativity boundedness solutions, basic reproduction number $...
Based on the most widely used proportional-integrator controller of tip-tilt correction loop in an adaptive optical system, relationship between optimal closed-loop bandwidth and atmosphere turbulence as well sensor noise is analyzed. Numerical simulation also performed by using time serial signals that follow power spectrum density global tilt Kolmogorov turbulence. Results show with different turbulences noises, capability can be brought into full play choosing appropriate residual...
Based on the time serial signal generated by power spectrum density inversion, closed-loop compensation residual variances of tracking loop and high-order error correction with finite rejection -3 dB bandwidth delay are simulated. The data fitting results relationships between corresponding bandwidths obtained. system effective modified so as to make estimate more precise.
The interaction matrix of an adaptive optical system is directly computed. In this method, based on the correlation between measured and theoretical slope influence vectors selected actuators, misalignment wavefront sensor corrector first estimated, then more close to real one obtained. Experimental results show that with considering misalignment, acquired by direct computation becomes effective in closed-loop correction, residual error reduced.
Based on the basic principle of four-quadrant-based tracking sensor, centroid detection error and displacement sensitivity four-quadrant detector, caused by noise or crosstalk in multiple anode photomultiplier (PMT tube), are analyzed detail. The formula senor is given theory verified experiment. results show that when photon-electron number per frame constant, increases as multiple-anode PMT increases, decreases numbers increases.
<p style='text-indent:20px;'>In this paper, we establish a new online game addiction model with low and high risk exposure. With the help of next generation matrix, basic reproduction number <inline-formula><tex-math id="M1">\begin{document}$ R_{0} $\end{document}</tex-math></inline-formula> is obtained. By constructing suitable Lyapunov function, equilibria are Globally Asymptotically Stable. We use optimal control theory to study solution problem three kinds measures (isolation, education...
As the first‐wave COVID‐19 has passed in 2020, people's awareness of self‐protection began to decline gradually. How prevent and control second‐wave become an important issue many countries regions. By analyzing transmission caused by imported case Tonghua City, Jilin Province, China, January 2021, we establish a new mathematical model simulate characteristics COVID‐19. First, analyze basic properties model, prove existence equilibrium point, obtain expression reproduction number with...
Abstract Based on high frequency data (5 minutes) and low (day), this paper models analyses the Shanghai Stock Exchange Index (SH1A0001). Through stationarity test ARCH effect test, ARMA (1,1) – GARCH model is established. Under assumption of error term obeys Laplace distribution, estimation obtained. By result forward prediction, it found that prediction in better than those data.
In this essay, when the oil tank position was not changed or longitudinal inclination angle, we determine function relationships among reserve soil height and deflection parameters, give tanks of capacity charts calibration value combined with MATLAB software, then draw a compare figure unchanged shifted position, for case effects vertical tilt angle lateral model volume is given out, in use nonlinear least square method to fit collected data, get parameter program integrated results MAPLE.
Abstract In order to simulate the process of game communication, a SIPQ model with relapse and time delay is constructed, which includes susceptible, infective, professional quitting compartments. We also consider that direct transfer from susceptible individuals individuals. The global dynamics are determined by basic reproduction number R0. locally asymptotical stability disease-free equilibrium derived.
The tracking errors of large-caliber optical telescope in the process observing astral target consists jitter error which is mainly caused by wind-load, and wave-front tilt atmospheric turbulence. A simplified model concerning established, a new kind algorithm based on AR to separate from turbulence proposed. Finally, an experiment conducted platform 1.8 M Gaomeigu Observing Station test this algorithm. Experimental results show that wind-load directly related direction speed wind, conforms...