Optimized Particle Swarm Optimization (OPSO) and its application to artificial neural network training

Meissner, Michael, Schmuker, Michael and Schneider, Gisbert (2006) Optimized Particle Swarm Optimization (OPSO) and its application to artificial neural network training. BMC Bioinformatics, 7. p. 125. ISSN 1471-2105

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Abstract

Background

Particle Swarm Optimization (PSO) is an established method for parameter optimization. It represents a population-based adaptive optimization technique that is influenced by several "strategy parameters". Choosing reasonable parameter values for the PSO is crucial for its convergence behavior, and depends on the optimization task. We present a method for parameter meta-optimization based on PSO and its application to neural network training. The concept of the Optimized Particle Swarm Optimization (OPSO) is to optimize the free parameters of the PSO by having swarms within a swarm. We assessed the performance of the OPSO method on a set of five artificial fitness functions and compared it to the performance of two popular PSO implementations.

Results

Our results indicate that PSO performance can be improved if meta-optimized parameter sets are applied. In addition, we could improve optimization speed and quality on the other PSO methods in the majority of our experiments. We applied the OPSO method to neural network training with the aim to build a quantitative model for predicting blood-brain barrier permeation of small organic molecules. On average, training time decreased by a factor of four and two in comparison to the other PSO methods, respectively. By applying the OPSO method, a prediction model showing good correlation with training-, test- and validation data was obtained.

Conclusion

Optimizing the free parameters of the PSO method can result in performance gain. The OPSO approach yields parameter combinations improving overall optimization performance. Its conceptual simplicity makes implementing the method a straightforward task.

Item Type: Article
Schools and Departments: School of Engineering and Informatics > Informatics
Subjects: Q Science
T Technology
Depositing User: michael Schmuker
Date Deposited: 23 Sep 2014 13:29
Last Modified: 06 Mar 2017 17:34
URI: http://sro.sussex.ac.uk/id/eprint/50201

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