【摘要】 建立了疾病发生率为β(N)S I的S IR传染病模型,结合具有常数移民和指数出生的一般情形对所建传染病模型进行分析研究,分别就外界迁入人口中有、无染病者的情形给出了该模型的平衡点.更多还原

【Abstract】 After establishing a model for the incidence of SIR epidemic disease β(N)SI,the authors have made a research on the normal situation of the population with a constant emigration and exponent birth rate,presenting the equilibrium point for the model established while taking into account of the infected or disease-free situation of emigration population.更多还原