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针对城市废水生物处理系统的复杂性，不确定性和难以建立准确的数学模型的特点，本文提出了一种用Ｂ－Ｐ神经网络来完成规则推理的模糊控制器。仿真结果表明，该系统具有良好的动态性能和较强的鲁棒性与容错性，具有实际工程应用的价值。
In view of the complexity and uncertainty of urban wastewater biological treatment system and the difficulty of establishing accurate mathematical model, this paper presents a fuzzy controller that uses B-P neural network to perform rule reasoning. The simulation results show that the system has good dynamic performance and strong robustness and fault tolerance, which has the value of practical engineering application.