Numerical solution of elliptic partial differential equation using radial basis function neural networks

Authors:
Li Jianyu;Luo Siwei;Qi Yingjian;Huang Yaping
Affiliations:
Computer Science Department, Northern Jiaotong University, Beijing 100044, People's Republic of China and Information and Engineering College, Beijing Broadcasting Institute, Beijing, People's Rep ...;Computer Science Department, Northern Jiaotong University, Beijing 100044, People's Republic of China;Computer Science Department, Northern Jiaotong University, Beijing 100044, People's Republic of China;Computer Science Department, Northern Jiaotong University, Beijing 100044, People's Republic of China
Venue:
Neural Networks - 2003 Special issue: Advances in neural networks research — IJCNN'03
Year:
2003

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Abstract

In this paper a neural network for solving partial differential equations is described. The activation functions of the hidden nodes are the radial basis functions (RBF) whose parameters are learnt by a two-stage gradient descent strategy. A new growing RBF-node insertion strategy with different RBF is used in order to improve the net performances. The learning strategy is able to save computational time and memory space because of the selective growing of nodes whose activation functions consist of different RBFs. An analysis of the learning capabilities and a comparison of the net performances with other approaches have been performed. It is shown that the resulting network improves the approximation results.