研究了一类单营养物单物种的未搅拌Chemostat模型正解的分歧及其稳定性.利用特征值和单重特征值的局部分歧理论,以物种“的死亡率忌作为分歧参数,证明了系统在半平凡解(z,0)附近出现分支,得到了该模型存在正平衡解的充分条件,并运用线性算子的扰动理论和分歧解的稳定性理论,说明了此平衡解在一定条件下是稳定的.
The bifurcation and the stability of the nonnegative solution of an unstirred chemostat model with simple population are discussed. The death rate k is treated as bifurcation parameter, and the bifurcation from the semi-trivial solution ( z ,0) is obtained by using the theory of eigenvalues and local bifurcations. A sufficient condition for the existence of positive steady-state solutions is given. The stability of this solution is obtained by using perturbation theory of linear operators and stability theory of bifurcation solutions.