Qualitative dynamic analysis of virus Inflection model
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The dynamic system of the durative viral infection was analyzed using the method of qualitative description and the qualitative behaviors of the system were predicted by describing the qualitative states and the transition among these states.The qualitative description of a dynamic system was expanded by relating the qualitative behaviors of extrema and those crossing the equilibrium values.The creating algorithm was given to build the qualitative states automatically from the virus infection dynamic mode,and the reasoning algorithm to define the transitions between these states was presented.The qualitative simulation of a viral infection dynamic model was shown without quantitative formulation of parameters in the system.The study shows that the qualitative dynamic analysis can provide an alternative way to model the virus infection process.