Recommender system using Long-term Cognitive Networks

Napoles, Gonzalo; Grau, Isel; Salgueiro, Yamisleydi

Abstract

In this paper, we build a recommender system based on Long-term Cognitive Networks (LTCNs), which are a type of recurrent neural network that allows reasoning with prior knowledge structures. Given that our approach is context-free and that we did not involve human experts in our study, the prior knowledge is replaced with Pearson's correlation coefficients. The proposed architecture expands the LTCN model by adding Gaussian kernel neurons that compute estimates for the missing ratings. These neurons feed the recurrent structure that corrects the estimates and makes the predictions. Moreover, we present an extension of the non-synaptic backpropagation algorithm to compute the proper non-linearity of each neuron together with its activation boundaries. Numerical results using several case studies have shown that our proposal outperforms most state-of-the-art methods. Towards the end, we explain how can we inject expert knowledge to the proposed neural system. (C) 2020 Elsevier B.V. All rights reserved.

Más información

Título según WOS: ID WOS:000571534300011 Not found in local WOS DB
Título de la Revista: KNOWLEDGE-BASED SYSTEMS
Volumen: 206
Editorial: Elsevier
Fecha de publicación: 2020
DOI:

10.1016/j.knosys.2020.106372

Notas: ISI