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Structure of the Mixed Neural Networks Based On Orthogonal Basis Functions  

Kim, Seong-Joo (School of Electrical and Electronics Eng. Chung-Ang Univ.)
Seo, Jae-Yong (School of Info. Tech. Eng. Korea Univ. of Tech. and Edu.)
Cho, Hyun-Chan (School of Info. Tech. Eng. Korea Univ. of Tech. and Edu.)
Kim, Seong-Hyun (Dept. of Electronics, Tongwon Coollege)
Kim, Hong-Tae (School of Electrical and Electronics Eng. Chung-Ang Univ.)
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Abstract
The wavelet functions are originated from scaling functions and can be used as activation function in the hidden node of the network by deciding two parameters such as scale and center. In this paper, we would like to propose the mixed structure. When we compose the WNN using wavelet functions, we propose to set a single scale function as a node function together. The properties of the proposed structure is that while one scale function approximates the target function roughly, the other wavelet functions approximate it finely. During the determination of the parameters, the wavelet functions can be determined by the global search algorithm such as genetic algorithm to be suitable for the suggested problem. Finally, we use the back-propagation algorithm in the learning of the weights.
Keywords
Mixed Neural Networks; wavelet function; Scaling function; Orthogonal Basis functions;
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