研究了一类带有Beddington-DeAngelis型功能函数非均匀的Chemostat模型,首先利用特征值和分歧理论,通过对平衡态方程的线性算子的主特征值加以限定,证明了系统在半平凡解(θ,0)附近出现正解分支,得到该模型存在正平衡解的充分条件;其次运用分歧解的稳定性理论分析出此正平衡解在一定条件下是稳定的.
An unstirred chemostat model with Beddington-DeAngelis functional response is discussed. First, the bifurcation at the semi-trivial solution (θ,0) is obtained by using theory of eigenvalue and bifurcation. A sufficient condition for the existence of positive steady-state solutions is given. Second, it is proved that under some conditions, the positive steady-state solutions are stable by using the stability theorem on bifurcation solutions.