Zobrazeno 1 - 10
of 59
pro vyhledávání: '"Jia-Fang Zhang"'
Autor:
Na Lin, Xiao-Man Li, Mao-Yuan Yang, Li Tian, Zhi-Hua Li, Jie-Li Mao, Jia-Fang Zhang, Jie Chen, Fan Lyu, Ru-Zhi Deng
Publikováno v:
International Journal of Ophthalmology, Vol 16, Iss 11, Pp 1867-1875 (2023)
AIM: To develop the 17-item Asthenopia Survey Questionnaire (ASQ)-17 by Rasch analysis, and to generate a predictiveness score. METHODS: Totally 739 participants were recruited and 680 were involved in the result analysis in this prospective, cross-s
Externí odkaz:
https://doaj.org/article/c2a35be6c70640d993f8079ebddd991c
Publikováno v:
Electronic Journal of Qualitative Theory of Differential Equations, Vol 2015, Iss 99, Pp 1-22 (2016)
Existence and stability of spatially periodic solutions for a delay prey-predator diffusion system are concerned in this work. We obtain that the system can generate the spatially nonhomogeneous periodic solutions when the diffusive rates are suitabl
Externí odkaz:
https://doaj.org/article/0d38a00b702e48e7a036b4a680ee0c3a
Publikováno v:
Electronic Journal of Differential Equations, Vol 2012, Iss 223,, Pp 1-18 (2012)
In the previous article [Y.-X. Wang and W.-T. Li, J. Differential Equations, 251 (2011) 1670-1695], the authors have shown that the set of positive stationary solutions of a cross-diffusive Lotka-Volterra cooperative system can form an unbounded fish
Externí odkaz:
https://doaj.org/article/2f5330239e2d4c5794886573398c2125
Autor:
Jia-Fang Zhang, Dan Zhang
Publikováno v:
Abstract and Applied Analysis, Vol 2013 (2013)
The purpose of this paper is to study the dynamics of a phytoplankton-zooplankton model with toxin delay. By studying the distribution of the eigenvalues of the associated characteristic equation, the pitchfork bifurcation curve of the system is obta
Externí odkaz:
https://doaj.org/article/2d12c1e87eaa4eb3a83199574e5e77ea
Autor:
Jia-Fang Zhang
Publikováno v:
Abstract and Applied Analysis, Vol 2012 (2012)
This paper is concerned with a delayed predator-prey diffusion model with Neumann boundary conditions. We study the asymptotic stability of the positive constant steady state and the conditions for the existence of Hopf bifurcation. In particular, we
Externí odkaz:
https://doaj.org/article/839f09309de94d1daa133b16f138cc5a
Publikováno v:
Communications in Nonlinear Science and Numerical Simulation. 119:107109
Publikováno v:
Journal of Biological Systems. 28:927-944
In this work, we construct an age-structured HIV-1 infection model to investigate the interplay between [Formula: see text] cells and viruses. In our model, we assume that the variations in the death rate of productively infected [Formula: see text]
Publikováno v:
International Journal of Bifurcation and Chaos. 32
In this paper, we mainly investigate an infected-age structured HIV model with logistic growth for target cells, which simultaneously takes the latent factor and different transmission modes into consideration. On the basis of integrated semigroup th
Autor:
Huijuan Liu, Jia-Fang Zhang
Publikováno v:
Physica A: Statistical Mechanics and its Applications. 514:384-395
In this paper, we studied a HIV latent infection model with two time delays, where one delay is the time between viral entry into a cell and establishment of HIV latency and the other delay is the time between cell infection and viral production. The
Publikováno v:
Physica A: Statistical Mechanics and its Applications. 505:1150-1162
This paper is concerned with a phytoplankton–zooplankton model with toxin delay. It is shown that the positive equilibrium of the system is stable when the toxin delay is not included. However, we find that the incorporation of a discrete toxin del