前馈神经网络结构动态增长-修剪方法

摘要

Due to the unchangable on-line problem of hidden neurons in feed-forward neural networks, an adaptive growing and pruning algorithm ( AGP) was presented in this paper. This algorithm can insert and prune hidden neurons during the training process to adjust the structure of the network and achieve self organization of neural network structure, which can improve the performance of the neural network. Additionally, this algorithm has been applied to the biochemical oxygen demand ( BOD) soft measurement of the wastewater treatment process. Experimental results show that the proposed algorithm can forecast the effluent BOD with better generalization ability and higher accuracy than other self-organizing neural networks.%针对前馈神经网络隐含层神经元不能在线调整的问题,提出了一种自适应增长修剪算法(AGP),利用增长和修剪相结合对神经网络隐含层神经元进行调整,实现神经网络结构的自组织,从而提高神经网络的性能.同时,将该算法应用于污水处理生化需氧量(BOD)软测量,仿真实验结果表明,与其他自组织神经网络相比,AGP具有较好的泛化能力及较高的拟合精度,能够实现出水BOD的预测.