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Entropy, Volume 26, Issue 4

April 2024 - 74 articles

Cover Story: The Lorenz attractor reminds us of the "Butterfly Effect", which illustrates the essence of chaos, showing sensitive dependence to initial conditions, i.e., small changes in initial conditions can lead to dramatic variations in the long run. Chaotic data are statistically indistinguishable from randomness; therefore, such a distinction should be based on algebraic and/or topological arguments. Visibility and phase space reconstruction graphs are powerful tools for representing the dynamics of complex systems, as different dynamics generate different types of networks. Evaluating the claims that these methods can distinguish chaos from randomness in terms of the degree distributions of the associated networks, we conclude that such a distinction does not hold in general. View this paper
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Articles (74)

  • Article
  • Open Access
2,093 Views
22 Pages

21 April 2024

The practical implementation of massive multi-user multi-input–multi-output (MU-MIMO) downlink communication systems power amplifiers that are energy efficient; otherwise, the power consumption of the base station (BS) will be prohibitive. Cons...

  • Feature Paper
  • Article
  • Open Access
7 Citations
2,733 Views
21 Pages

20 April 2024

We construct an infinite family of bounded-degree bipartite unique neighbour expander graphs with arbitrarily unbalanced sides. Although weaker than the lossless expanders constructed by Capalbo et al., our construction is simpler and may be closer t...

  • Article
  • Open Access
6 Citations
1,996 Views
19 Pages

19 April 2024

The lattice Boltzmann method is employed in the current study to simulate the heat transfer characteristics of sinusoidal-temperature-distributed heat sources at the bottom of a square cavity under various conditions, including different amplitudes,...

  • Article
  • Open Access
1 Citations
2,482 Views
25 Pages

19 April 2024

We revisit the well-known Gilbert–Varshamov (GV) bound for constrained systems. In 1991, Kolesnik and Krachkovsky showed that the GV bound can be determined via the solution of an optimization problem. Later, in 1992, Marcus and Roth modified t...

  • Article
  • Open Access
4 Citations
2,565 Views
17 Pages

19 April 2024

Quantum annealers are suited to solve several logistic optimization problems expressed in the QUBO formulation. However, the solutions proposed by the quantum annealers are generally not optimal, as thermal noise and other disturbing effects arise wh...

  • Article
  • Open Access
7 Citations
6,956 Views
19 Pages

18 April 2024

Social media platforms have surpassed cultural and linguistic boundaries, thus enabling online communication worldwide. However, the expanded use of various languages has intensified the challenge of online detection of hate speech content. Despite t...

  • Article
  • Open Access
1,984 Views
13 Pages

Time-Varying GPS Displacement Network Modeling by Sequential Monte Carlo

  • Suchanun Piriyasatit,
  • Ercan Engin Kuruoglu and
  • Mehmet Sinan Ozeren

18 April 2024

Geodetic observations through high-rate GPS time-series data allow the precise modeling of slow ground deformation at the millimeter level. However, significant attention has been devoted to utilizing these data for various earth science applications...

  • Article
  • Open Access
3 Citations
3,174 Views
19 Pages

Distinction of Chaos from Randomness Is Not Possible from the Degree Distribution of the Visibility and Phase Space Reconstruction Graphs

  • Alexandros K. Angelidis,
  • Konstantinos Goulas,
  • Charalampos Bratsas,
  • Georgios C. Makris,
  • Michael P. Hanias,
  • Stavros G. Stavrinides and
  • Ioannis E. Antoniou

17 April 2024

We investigate whether it is possible to distinguish chaotic time series from random time series using network theory. In this perspective, we selected four methods to generate graphs from time series: the natural, the horizontal, the limited penetra...

  • Article
  • Open Access
6 Citations
2,386 Views
14 Pages

Irradiation-Hardening Model of TiZrHfNbMo0.1 Refractory High-Entropy Alloys

  • Yujun Fan,
  • Xuejiao Wang,
  • Yangyang Li,
  • Aidong Lan and
  • Junwei Qiao

17 April 2024

In order to find more excellent structural materials resistant to radiation damage, high-entropy alloys (HEAs) have been developed due to their characteristics of limited point defect diffusion such as lattice distortion and slow diffusion. Specially...

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Entropy - ISSN 1099-4300