Zahra Afsharnezhad

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In this paper, we consider a four dimensional model of the human immunodeficiency virus-1 (HIV-1) with delay, which is an extension of some three dimensional models. We approach the treatment problem by adding two controllers to the system for inhibiting viral production. The optimal controller $$u_{1}$$ u 1 is considered for vaccine and $$u_{2}$$ u 2 for(More)
In this paper, receptor-based cellular nonlinear network model is studied. By applying neural network method, the ordinary differential equations being equivalent to the partial differential equations of the model are resulted. Also, the bifurcation analysis of the transformed system is presented. To support our theoretical results, some numerical examples(More)
In this paper, an eight-neuron BAM neural network model with multiple delays is considered. We analyze existence of periodic solutions and conclude some of their properties such as being bounded. Furthermore, we c appropriate Lyapunov function which implies the global asymptotically stability. To illustrate our theoretical results simulations are presented.
In this paper, a five-neuron bidirectional associative memory (BAM) neural network with two time delays is studied. Since the study of Hopf bifurcation is very important for the design and application of BAM neural networks, we investigate that Hopf bifurcation occurs and a family of periodic solutions appear when the sum of two delays passes through a(More)
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