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转换机制下具有非线性扰动的随机SIVS传染病模型的定性分析
张仲华,张倩

Qualitative Analysis of a Stochastic SIVS Epidemic Model with Nonlinear Perturbations Under Regime Switching
Zhonghua Zhang,Qian Zhang
图 1 系统(2.3)的初值为(0.8,0.9,1.5)的解曲线, S(t),I(t),V(t)呈周期性波动