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On the dynamics and robustness of the chemostat with multiplicative noise

机译:乘法噪声调节器的动态与鲁棒性

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The stochastic dynamics of a two-state bioreactor model with random feed flow fluctuations and non-monotonic specific growth rate is analyzed. Using the Fokker-Planck equation approach for describing the probability density function (PDF) evolution the lack of stochastic robustness due to deterministic bifurcation phenomena for the open-loop reactor operating under optimal (maximum production) operation condition is established, and the associated stochastic stabilization problem is addressed. Inherent differences between the presence of multiplicative noise, due to the feed flow fluctuations, and additive background noise are analytically established. Numerical simulation results illustrate these inherent differences, the stochastic fragility of the open-loop operation yielding a stochastic extinction phenomenon, as well as the stochastic PDF stabilization with a proportional feedback control.
机译:分析了具有随机饲料流动波动和非单调特异性生长速率的两种生物反应器模型的随机动力学。 使用Fokker-Planck方程方法来描述概率密度函数(PDF)演变,由于确定了在最佳(最大生产)操作条件下的开环电抗器的确定性分叉现象而缺乏随机稳健性,以及相关随机稳定化 问题是解决的。 由于进料流动波动和附加背景噪声,乘法噪声的存在与附加背景噪声的固有差异。 数值模拟结果说明了这些固有的差异,开环操作的随机脆性产生随机消光现象,以及具有比例反馈控制的随机PDF稳定。

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