基于信息强度的RBF神经网络结构设计研究

韩红桂; 乔俊飞; 薄迎春

doi:10.3724/SP.J.1004.2012.01083

基于信息强度的RBF神经网络结构设计研究

doi: 10.3724/SP.J.1004.2012.01083

1.
北京工业大学电子信息与控制工程学院北京 100124

详细信息

通讯作者:
韩红桂

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出版历程
- 收稿日期: 2011-09-28
- 修回日期: 2011-12-12
- 刊出日期: 2012-07-20

On Structure Design for RBF Neural Network Based on Information Strength

1.
College of Electronic and Control Engineering, Beijing University of Technology, Beijing 100124

摘要

摘要: 在系统研究前馈神经网络的基础上,针对径向基函数(Radial basis function, RBF) 网络的结构设计问题,提出一种弹性RBF神经网络结构优化设计方法. 利用隐含层神经元的输出信息(Output-information, OI)以及隐含层神经元与输出层神经元间的交互信息(Multi-information, MI)分析网络的连接强度, 以此判断增加或删除RBF神经网络隐含层神经元, 同时调整神经网络的拓扑结构,有效地解决了RBF神经网络结构设计问题; 利用梯度下降的参数修正算法保证了最终RBF网络的精度, 实现了神经网络的结构和参数自校正. 通过对典型非线性函数的逼近与污水处理过程关键水质参数建模, 结果证明了该弹性RBF具有良好的动态特征响应能力和逼近能力, 尤其是在训练速度、泛化能力、最终网络结构等方面较之最小资源神经网络(Minimal resource allocation net works, MRAN)、增长修剪RBF 神经网络(Generalized growing and pruning RBF, GGAP-RBF)和自组织RBF神经网络(Self-organizing RBF, SORBF)有较大的提高.
- 弹性RBF神经网络 /
- 结构设计 /
- 非线性系统 /
- 动态特征响应
Abstract: Based on the systemic investigation on the feedforword neural network, for the problem of the structure design of the RBF neural network, a new flexible structure design method is used for RBF neural network in this paper. By computing the output-information (OI) of the hidden neurons and the multi-information (MI) of the hidden nodes and output nodes, the hidden nodes in the RBF neural network can be inserted or pruned, thus the topology of the network can be modulated. This method can effectively solve the structure design of the RBF neural network. The grad-descent method for the parameter adjusting ensures the exactitude of the flexible RBF neural network (F-RBF). The structure of the RBF neural network is self-organizing, and the parameters are self-adaptive. In the end, the proposed F-RBF is used for approximating the classical non-linear functions and modelling key parameters of the wastewater treatment process. The results show that the F-RBF obtains a favorable dynamic character response and the approximating ability. Especially, comparied with the minimal resource allocation networks (MRAN), the generalized growing and pruning RBF (GGAP-RBF) and the self-organizing RBF (SORBF), the proposed algorithm is more effective in terms of training time, generalization, and neural network structure.
- Flexible RBF neural network (F-RBF) /
- structure design /
- non-linear systems /
- dynamic character response

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参考文献(1)

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