主要结论：当且仅当基本再生数小于等于时，系统存在唯一无病平衡点，且无病平衡点是全局渐近稳定。
The main conclusion drawn from this study is that: if and only if the basic productive number , the only disease-free equilibrium exists in the system and it is of global asymptotic stability.
通过寻找”基本再生数”对比了捕杀、免疫、捕杀和免疫相结合三种不同策略在控制狂犬病传播中的有效性。
We found out the basic reproduction number and compared the efficiency of the three strategies for controlling the rabies: culling, vaccination, culling and vaccination.
在基本再生数的指导下，通过提高防病毒系统预装率，能减弱机器更新带来的负面影响，并能有效抑制蠕虫的传播。
Under the guidance of basic reproduction number, the negative effect can be alleviated and worms can be terminated by introducing a anti-virus system of high initial installation rate.
讨论了一类由两种不同病毒导致的SIR流行病模型，分析了平凡平衡点的局部稳定性，得到了基本再生数的数学表达式；
A two-strain SIR epidemic model is discussed and an explicit formula for the basic reproductive number is derived by analyzing the local stability of the trivial equilibrium.
讨论了一类由两种不同病毒导致的SIR流行病模型，分析了平凡平衡点的局部稳定性，得到了基本再生数的数学表达式；
A two-strain SIR epidemic model is discussed and an explicit formula for the basic reproductive number is derived by analyzing the local stability of the trivial equilibrium.
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