Figure 2From: Existence and persistence of positive solution for a stochastic turbidostat model The time series and portrait phase of model ( 4.1 ) when \(\pmb{\alpha=0.3}\) ( \(\pmb{S^{(1)}(t)}\) and \(\pmb{S^{(2)}(t)}\) are two sample paths about \(\pmb{S(t)}\) , \(\pmb{x^{(1)}(t)}\) and \(\pmb{x^{(2)}(t)}\) are two sample paths about \(\pmb{x(t)}\) .) (a) represents the time series of \(S(t)\) and \(x(t)\); (b) represents the portrait phase.Back to article page