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Partial retraining: a new approach to input relevance determination.

P van de Laar¹, T Heskes, S Gielen

¹Department of Medical Physics and Biophysics, University of Nijmegen, The Netherlands. pierre@mbfys.kun.nl

International Journal of Neural Systems

|July 13, 1999

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We introduce partial retraining, a novel algorithm for assessing input variable relevance in trained neural networks. This method demonstrates superior performance compared to existing techniques in numerical experiments.

Area of Science:

Machine Learning
Artificial Intelligence
Computational Neuroscience

Background:

Determining input variable relevance is crucial for understanding and optimizing trained neural networks.
Existing methods like constant substitution, weight magnitude analysis, and Optimal Brain Surgeon have limitations.

Purpose of the Study:

To introduce and evaluate a new algorithm, partial retraining, for assessing input variable relevance in neural networks.
To compare the efficacy of partial retraining against established relevance determination techniques.

Main Methods:

The partial retraining algorithm is proposed as a novel approach to feature relevance.
Comparative numerical experiments were conducted on both artificial and real-world datasets.

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Main Results:

Partial retraining consistently outperformed competing methods in relevance determination tasks.
The algorithm proved effective across diverse problem types, including artificial and real-world scenarios.

Conclusions:

Partial retraining offers a more effective approach to identifying relevant input variables in neural networks.
This algorithm provides a valuable tool for model interpretation and feature selection in machine learning.