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Entropy, Volume 24, Issue 7

July 2022 - 163 articles

Cover Story: Permutation entropy (PE) is a popular tool to analyze time series in order to either estimate the degree of randomness of a time series source or to detect changes in its dynamics. However, most works that rely on PE neglect the crucial problem of considering the statistical significance of a PE assessment, or, equivalently, of estimating its uncertainty—a task that is hardly feasible in most cases. A new, viable approach to carry out this estimation exploits the technique of surrogate data generation. Using the technique as a proxy generator of the source’s dynamics allows us to assess its statistical properties. View this paper
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Articles (163)

  • Article
  • Open Access
21 Citations
3,755 Views
15 Pages

LGCCT: A Light Gated and Crossed Complementation Transformer for Multimodal Speech Emotion Recognition

  • Feng Liu,
  • Si-Yuan Shen,
  • Zi-Wang Fu,
  • Han-Yang Wang,
  • Ai-Min Zhou and
  • Jia-Yin Qi

21 July 2022

Semantic-rich speech emotion recognition has a high degree of popularity in a range of areas. Speech emotion recognition aims to recognize human emotional states from utterances containing both acoustic and linguistic information. Since both textual...

  • Article
  • Open Access
6 Citations
2,778 Views
12 Pages

Exposing Deep Representations to a Recurrent Expansion with Multiple Repeats for Fuel Cells Time Series Prognosis

  • Tarek Berghout,
  • Mohamed Benbouzid,
  • Toufik Bentrcia,
  • Yassine Amirat and
  • Leïla-Hayet Mouss

21 July 2022

The green conversion of proton exchange membrane fuel cells (PEMFCs) has received particular attention in both stationary and transportation applications. However, the poor durability of PEMFC represents a major problem that hampers its commercial ap...

  • Article
  • Open Access
5 Citations
2,073 Views
13 Pages

21 July 2022

Augmented IIR filter adaptive algorithms have been considered in many studies, which are suitable for proper and improper complex-valued signals. However, lots of augmented IIR filter adaptive algorithms are developed under the mean square error (MSE...

  • Article
  • Open Access
1 Citations
2,335 Views
16 Pages

Experimental Diagnosis on Combustion Characteristic of Shock Wave Focusing Initiation Engine

  • Shida Xu,
  • Feilong Song,
  • Xin Chen,
  • Hesong Zhang,
  • Xingkui Yang and
  • Jianping Zhou

21 July 2022

A shock wave focusing initiation engine was assembled and tested in an experimental program. The effective pyrolysis rate of the pre-combustor was evaluated over a range of supplementary fuel ratio in this paper. Results highlight two operational mod...

  • Article
  • Open Access
7 Citations
2,203 Views
18 Pages

20 July 2022

In this article, the concept (i.e., the mathematical model and methods) of computational phonetic analysis of speech with an analytical description of the phenomenon of phonetic fusion is proposed. In this concept, in contrast to the existing methods...

  • Article
  • Open Access
2,546 Views
17 Pages

20 July 2022

Various mathematical frameworks play an essential role in understanding the economic systems and the emergence of crises in them. Understanding the relation between the structure of connections between the system’s constituents and the emergenc...

  • Article
  • Open Access
9 Citations
3,116 Views
23 Pages

Application of Statistical K-Means Algorithm for University Academic Evaluation

  • Daohua Yu,
  • Xin Zhou,
  • Yu Pan,
  • Zhendong Niu and
  • Huafei Sun

20 July 2022

With the globalization of higher education, academic evaluation is increasingly valued by the scientific and educational circles. Although the number of published papers of academic evaluation methods is increasing, previous research mainly focused o...

  • Article
  • Open Access
1 Citations
2,277 Views
17 Pages

Robust Self-Testing of Four-Qubit Symmetric States

  • Daipengwei Bao,
  • Xiaoqing Tan,
  • Qingshan Xu,
  • Haozhen Wang and
  • Rui Huang

20 July 2022

Quantum verification has been highlighted as a significant challenge on the road to scalable technology, especially with the rapid development of quantum computing. To verify quantum states, self-testing is proposed as a device-independent concept, w...

  • Article
  • Open Access
2 Citations
2,041 Views
13 Pages

20 July 2022

The axisymmetric time-fractional diffusion equation with mass absorption is studied in a circle under the time-harmonic Dirichlet boundary condition. The Caputo derivative of the order 0<α≤2 is used. The investigated equation can be consi...

  • Article
  • Open Access
4 Citations
2,009 Views
11 Pages

19 July 2022

Recent results by the authors on proton diffractive dissociation (single, double and central) in the low-mass resonance region with emphasis on the LHC kinematics are reviewed and updated. Based on the previous ideas that the contribution of the inel...

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Entropy - ISSN 1099-4300