单种群体发生传染病的生物总数

<title>Biological Quantity of Epidemical Single Colony

主要运用微分方程的基础理论知识对具有这种数学模型dpdt=ap-bp2的生物发生传染病时的总数变化进行了研究,得到了生物发生传染病时的总数是随时间而周期性变化的规律.

<Abstrcat>By using the basic theory of differential equation, whether the quantity variation of the biology at the time of being infected has a mathematical modeldpdt=ab-bp2is studied. And the periodical disciplinarian has been therefore obtained.