Optimization of learning algorithms in multilayer perceptron (MLP) for sheet resistance of reduced graphene oxide thin-film

• Published in: Indonesian Journal of Electrical Engineering and Computer Science
• Main Author: Aminuddin N.A.B.; Ismail N.; Masrie M.; Badaruddin S.A.M.
• Format: Article
• Language: English
• Published: Institute of Advanced Engineering and Science 2021
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85112220426&doi=10.11591%2fijeecs.v23.i2.pp686-693&partnerID=40&md5=a89fc6ff18506932da4c6b4b002015f5

Multilayer perceptron (MLP) optimization is carried out to investigate the classifier's performance in discriminating the uniformity of reduced Graphene Oxide (rGO) thin-film sheet resistance. This study used three learning algorithms: resilient back propagation (RP), scaled conjugate gradient (SCG) and levenberg-marquardt (LM). The dataset used in this study is the sheet resistance of rGO thin films obtained from MIMOS Bhd. This work involved samples selection from a uniform and non-uniform rGO thin-film sheet resistance. The input and output data were undergoing data pre-processing: data normalization, data randomization, and data splitting. The data were divided into three groups; training, validation and testing with a ratio of 70%: 15%: 15%, respectively. A varying number of hidden neurons optimized the learning algorithms in MLP from 1 to 10. Their behavior helped establish the best learning algorithms in discriminating MLP for rGO sheet resistance uniformity. The performances measured were the accuracy of training, validation and testing dataset, mean squared errors (MSE) and epochs. All the analytical work in this study was achieved automatically via MATLAB software version R2018a. It was found that the LM is dominant in the optimization of a learning algorithm in MLP for rGO sheet resistance. The MSE for LM is the most reduced amid SCG and RP. © 2021 Institute of Advanced Engineering and Science. All rights reserved.