نتایج جستجو برای: mathematical model of hiv infection
تعداد نتایج: 21459276 فیلتر نتایج به سال:
Background: Infection with human immune deficiency virus (HIV) or hepatitis B virus (HBV) is one of the health problems in blood transfusion science. This study was conducted in shiraz for determination of the rate of HIV positivity in blood donors during the years 1998-2002. Materials and Methods: This cross-sectional descriptive study was conducted on 615790 blood donors. All samples were scr...
The paper presents a model of CD4 + lymphocyte dynamics in HIV-infected persons. The model incorporates a feedback mechanism regulating the production of T lymphocytes and simulates the dynamics of CD8 + lymphocytes, whose production is assumed to be closely linked to that of CD4 + cells. Because CD4 + lymphocyte counts are a good prognostic indicator of HIV infection, the model was used to sim...
We propose a mathematical model based on set of delay differential equations that describe intracellular HIV infection. The includes three different subpopulations cells and the virus. is formulated in such way takes into account time between viral entry target cell production new virions. study local stability infection-free endemic equilibrium states. Moreover, by using suitable Lyapunov func...
We make a mathematical analysis of an age structured HIV infection model with both virus-to-cell and cell-to-cell transmissions to understand the dynamical behavior of HIV infection in vivo. In the model, we consider the proliferation of uninfected CD4+ T cells by a logistic function and the infected CD4+ T cells are assumed to have an infection-age structure. Our main results concern the Hopf ...
a one dimensional dynamic model for a riser reactor in a fluidized bed catalytic cracking unit (fccu) for gasoil feed has been developed in two distinct conditions, one for industrial fccu and another for fccu using various frequencies of microwave energy spaced at the height of the riser reactor (fccu-mw). in addition, in order to increase the accuracy of component and bulk diffusion, instanta...
This paper presents a numerical method for solving a fractional model of HIV infection of CD4 + T cells. Using this model, we can examine the progression and spread of HIV. This method is a collocation method based on Dikson polynomials. Chebyshev's nodes are used in this method. By performing this process, the system of fractional differential equations converted to a nonlinear equations syst...
since esp received universal attention to smooth the path for academic studies and productions, a great deal of research and studies have been directed towards this area. swales’ (1990) model of ra introduction move analysis has served a pioneering role of guiding many relevant studies and has proven to be productive in terms of helpful guidelines that are the outcome of voluminous productions ...
Abstract: The aim of this work is to investigate a new mathematical model with delay that describes HIV infection of CD4 T-cells during therapy. A novel feature is that both therapy and the delay are incorporated into the model. We prove that the infection will die out if the basic reproduction number R0 < 1 while the HIV infection may become endemic if R0 > 1. Stability analysis of both endemi...
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