基于修改误差函数新的BP学习算法  

New Learning Algorithm of Neural Network Based on Modified Error Function

作　　者：胡上尉[1] 刘琼荪[1] 刘佳璐[1] 孙海雷[1] 

机构地区：[1]重庆大学数理学院,重庆400030

出　　处：《系统仿真学报》2007年第19期4591-4593,4598,共4页Journal of System Simulation

摘　　要：通过分析隐层神经元饱和度对网络性能的影响,构造了新的误差函数,同时设计了一种自适应调节的放大误差信号方法,得到新的BP学习算法。该算法流程简单,不需要太大的计算复杂性。仿真实验结果表明新改进算法在收敛速度和避免误差函数陷入局部极小方面明显优于其它BP算法。By analyzing the influences of saturation degree in the hidden layer on the performances of multi-layer feedforward neural networks, a new error function was constructed, a new adaptive method of magnifying error signal was designed, and an improved back-propagation algorithm was proposed. In addition, the flow is simple and no heavy computational is necessary in the proposed algorithm. The results show that, in terms of the convergence rate and the capability of avoiding local minima, the new algorithm always outperforms the other traditional methods.

关 键 词：前馈神经网络 学习算法 饱和度 局部极小 误差信号 

分 类 号：TP183[自动化与计算机技术—控制理论与控制工程]