The Randić index was proposed by Randić in 1975 and has been widely studied in different
areas. We briefly review the Randić index and various Randić-type descriptors from 1975 to …

Network theory has unveiled the underlying structure of complex systems such as the
Internet or the biological networks in the cell. It has identified universal properties of complex …

In the present work we intend to investigate how to detect the behaviour of the immune
system reaction to an external stimulus in terms of phase transitions. The immune model …

Entropy metrics (for example, permutation entropy) are nonlinear measures of irregularity in
time series (one-dimensional data). Some of these entropy metrics can be generalised to …

Abstract We propose a Markov Switching Graphical Seemingly Unrelated Regression (MS-
GSUR) model to investigate time-varying systemic risk based on a range of multi-factor asset …

In this paper, we propose a novel framework of computing the Quantum-based Entropic
Representations (QBER) for un-attributed graphs, through the Continuous-time Quantum …

With the rapid development of mobile devices and pervasive computing technologies,
acceleration-based human activity recognition, a difficult yet essential problem in mobile …

The von Neumann entropy of a graph is a spectral complexity measure that has recently
found applications in complex networks analysis and pattern recognition. Two variants of the …

Graph sparsification aims to reduce the number of edges of a graph while maintaining its
structural properties. In this paper, we propose the first general and effective information …

In this paper, we develop an entropy measure for assessing the structural complexity of
directed graphs. Although there are many existing alternative measures for quantifying the …