Probabilistic Grammar-based Neuroevolution for Physiological Signal Classification of Ventricular Tachycardia

Pak-kan WONG, Kwong-sak LEUNG, Man-leung WONG

Research output: Journal PublicationsJournal Article (refereed)

Abstract

Ventricular tachycardia is a rapid heart rhythm that begins in the lower chambers of the heart. When it happens continuously, this may result in life-threatening cardiac arrest. In this paper, we apply deep learning techniques to tackle the problem of the physiological signal classification of ventricular tachycardia, since deep learning techniques can attain outstanding performance in many medical applications. Nevertheless, human engineers are required to manually design deep neural networks to handle different tasks. This can be challenging because of many possible deep neural network structures. Therefore, a method, called ADAG-DNE, is presented to automatically design deep neural network structures using deep neuroevolution. Our approach defines a set of structures using probabilistic grammar and searches for best network structures using Probabilistic Model Building Genetic Programming. ADAG-DNE takes advantages of the probabilistic dependencies found among the structures of networks. When applying ADAG-DNE to the classification problem, our discovered model achieves better accuracy than AlexNet, ResNet, and seven non-neural network classifiers. It also uses about 2% of parameters of AlexNet, which means the inference can be made quickly. To summarize, our method evolves a deep neural network, which can be implemented in expert systems. The deep neural network achieves high accuracy. Moreover, it is simpler than existing deep neural networks. Thus, computational efficiency and diagnosis accuracy of the expert system can be improved.
Original languageEnglish
Pages (from-to)237-248
Number of pages12
JournalExpert Systems with Applications
Volume135
Early online date6 Jun 2019
DOIs
Publication statusPublished - 30 Nov 2019

Bibliographical note

This research is supported by the Lingnan University Direct Grant DR16A7.

Keywords

  • Physiological signal classification
  • Heart diseaseNeuroevolution
  • Probabilistic grammar
  • Genetic programming
  • Deep neural network
  • Neuroevolution
  • Heart disease

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