The Separation Property Enhancement of Liquid State Machine by Particle Swarm Optimization

Authors:
Jiangshuai Huang;Yongji Wang;Jian Huang
Affiliations:
Key Lab.for Image Processing &Intelligent Control, Department of Control Science and Engineering, Huazhong University of Science and Technology, Wuhan, China 430074;Key Lab.for Image Processing &Intelligent Control, Department of Control Science and Engineering, Huazhong University of Science and Technology, Wuhan, China 430074;Key Lab.for Image Processing &Intelligent Control, Department of Control Science and Engineering, Huazhong University of Science and Technology, Wuhan, China 430074
Venue:
ISNN 2009 Proceedings of the 6th International Symposium on Neural Networks: Advances in Neural Networks - Part III
Year:
2009

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Abstract

The separation property of Liquid State Machine (LSM) is a key for its power of computing, but the weights and delays of the inter-connections in the spiking neural circuit are usually randomly created and kept unchanged, which hinders the performance of the LSM greatly. In this paper, particle swarm optimization (PSO) was applied to optimize the weights and delays of the circuit so as to enhance the separation property of the LSM. Separation of random spike trains and Fisheriris data-set classification experiments are done by the optimized circuit. Demonstration examples show that the PSO can enlarge the separation property of the circuit greatly compared to the normal Hebbian-learning algorithm and enhance the computing ability of LSM.