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Axioms, Volume 11, Issue 8

August 2022 - 70 articles

Cover Story: Wavelet scattering is a time-frequency transform that can better represent signal characteristics due to the use of a recursive chain. It is a deep convolutional operator where filters are given instead of being learnt. In this paper, it is used as an input of an SVM classifier for signal classification purposes. The Minimum Description Length is used to define an automatic pre-processing procedure that estimates the best sampling step to apply to the wavelet scattering feature matrix before running the classifier. This allows us to optimize the learning process in terms of computing time, while increasing signal classification accuracy. View this paper
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Articles (70)

  • Article
  • Open Access
1 Citations
1,972 Views
21 Pages

18 August 2022

Understanding the performance of the data mining approach and topic evolution in a certain scientific domain is imperative to capturing key domain developments and facilitating knowledge transfer within and across domains. Our research selects lingui...

  • Article
  • Open Access
3 Citations
2,159 Views
9 Pages

An Improved Clustering Algorithm for Multi-Density Data

  • Abdulwahab Ali Almazroi and
  • Walid Atwa

18 August 2022

The clustering method divides a dataset into groups with similar data using similarity metrics. However, discovering clusters in different densities, shapes and distinct sizes is still a challenging task. In this regard, experts and researchers opt t...

  • Article
  • Open Access
41 Citations
4,048 Views
29 Pages

17 August 2022

In this work, information on COVID-19 confirmed cases is utilized as a dataset to perform time series predictions. We propose the design of ensemble neural networks (ENNs) and type-3 fuzzy inference systems (FISs) for predicting COVID-19 data. The an...

  • Review
  • Open Access
1 Citations
2,617 Views
10 Pages

17 August 2022

The tensorial force acting in a localized seismic focus is introduced and the corresponding seismic waves are derived, as solutions of the elastic wave equation in a homogeneous and isotropic body. The deconvolution of the solution for a structured f...

  • Article
  • Open Access
1 Citations
1,843 Views
20 Pages

17 August 2022

The paper studies a model of fluid flow in a fractured porous medium in which fractures are distributed uniformly over the volume. This model includes a nonlinear equation containing several terms with fractional derivatives in the sense of Caputo of...

  • Article
  • Open Access
9 Citations
2,837 Views
18 Pages

16 August 2022

As one of the most significant carbon emission departments in China, the power industry will gradually become the core hub of reducing carbon emissions in the process of undertaking carbon emissions transferred from other industries. Therefore, it is...

  • Article
  • Open Access
4 Citations
1,708 Views
23 Pages

Neighborhood Structures and Continuities via Cubic Sets

  • Jeong-Gon Lee,
  • Güzide Şenel,
  • Jong-Il Baek,
  • Sang Hyeon Han and
  • Kul Hur

16 August 2022

Cubic sets are a very useful generalization of fuzzy sets where one is allowed to extend the output through a subinterval of [0, 1] and a number from [0, 1]. In this article, we first highlight some of the claims made in the previous article about cu...

  • Article
  • Open Access
1,547 Views
12 Pages

15 August 2022

One recent and prolific direction in the development of fixed point theory is to consider an operator T:X→X defined on a metric space (X,d) which is an F—contraction, i.e., T verifies a condition of type τ+F(d(T(x),T(y))≤F(d(x,y)),...

  • Article
  • Open Access
30 Citations
7,624 Views
22 Pages

15 August 2022

Blockchain technologies, which form the basis of Industry 4.0, paved the way for cryptocurrencies to emerge as technological innovation in the technology age. Recently, investors worldwide have been interested in cryptocurrencies with increasing acce...

  • Article
  • Open Access
11 Citations
2,310 Views
17 Pages

15 August 2022

In this paper we study single-valued and multi-valued (k,ψ)-Hilfer-type boundary value problems of fractional order in (1,2], subject to nonlocal boundary conditions involving (k,ψ)-Hilfer-type derivative and integral operators. The results f...

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Axioms - ISSN 2075-1680