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Symmetry, Volume 11, Issue 12

December 2019 - 102 articles

Cover Story: A certain kind of small deviations from Lorentz symmetry can produce transition frequency shifts that depend on the direction of the orbital velocity of the Earth relative to a vector background Lorentz-violating field. As the Earth moves around the Sun, this can cause an annual variation of the atomic transition frequency. View this paper.
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Articles (102)

  • Article
  • Open Access
2,765 Views
12 Pages

12 December 2019

Existing tensor completion methods all require some hyperparameters. However, these hyperparameters determine the performance of each method, and it is difficult to tune them. In this paper, we propose a novel nonparametric tensor completion method,...

  • Article
  • Open Access
26 Citations
3,063 Views
16 Pages

Quantum Estimates of Ostrowski Inequalities for Generalized ϕ-Convex Functions

  • Miguel J. Vivas-Cortez,
  • Artion Kashuri,
  • Rozana Liko and
  • Jorge E. Hernández Hernández

12 December 2019

In this paper, the study is focused on the quantum estimates of Ostrowski type inequalities for q-differentiable functions involving the special function introduced by R.K. Raina which depends on certain parameters. Our methodology involves Jackson&r...

  • Article
  • Open Access
2 Citations
2,482 Views
13 Pages

11 December 2019

In a real Hilbert space, we investigate the Tseng’s extragradient algorithms with hybrid adaptive step-sizes for treating a Lipschitzian pseudomonotone variational inequality problem and a strict pseudocontraction fixed-point problem, which are...

  • Article
  • Open Access
3 Citations
3,213 Views
21 Pages

11 December 2019

Cross-efficiency evaluation approaches and common set of weights (CSW) approaches have long been suggested as two of the more important and effective methods for the ranking of decision making units (DMUs) in data envelopment analysis (DEA). The form...

  • Article
  • Open Access
3 Citations
3,492 Views
16 Pages

11 December 2019

A digital watermarking image compression method based on symmetrical encryption algorithm is proposed in this study. First, the original image and scrambled watermarking image are processed by wavelet transform, and then the watermarking image proces...

  • Article
  • Open Access
3 Citations
3,975 Views
31 Pages

Variance Ranking for Multi-Classed Imbalanced Datasets: A Case Study of One-Versus-All

  • Solomon H. Ebenuwa,
  • Mhd Saeed Sharif,
  • Ameer Al-Nemrat,
  • Ali H. Al-Bayatti,
  • Nasser Alalwan,
  • Ahmed Ibrahim Alzahrani and
  • Osama Alfarraj

11 December 2019

Imbalanced classes in multi-classed datasets is one of the most salient hindrances to the accuracy and dependable results of predictive modeling. In predictions, there are always majority and minority classes, and in most cases it is difficult to cap...

  • Article
  • Open Access
10 Citations
4,682 Views
12 Pages

Model of Threats to Computer Network Software

  • Aleksey Novokhrestov,
  • Anton Konev and
  • Alexander Shelupanov

11 December 2019

This article highlights the issue of identifying information security threats to computer networks. The aim of the study is to increase the number of identified threats. Firstly, it was carried out the analysis of computer network models used to iden...

  • Feature Paper
  • Article
  • Open Access
1 Citations
3,062 Views
16 Pages

Supersymmetric NJL-Type Model for a Real Superfield Composite

  • Yifan Cheng,
  • Yan-Min Dai,
  • Gaber Faisel and
  • Otto C. W. Kong

11 December 2019

The Nambu–Jona-Lasinio (NJL) model is a classic theory for the strong dynamics of composite fields and symmetry breaking. Supersymmetric versions of the NJL-type models are certainly of interest too. Particularly, the case with a composite (Hig...

  • Article
  • Open Access
2,234 Views
11 Pages

11 December 2019

Degenerate versions of polynomial sequences have been recently studied to obtain useful properties such as symmetric identities by introducing degenerate exponential-type generating functions. As part of our continued work in degenerate versions of g...

  • Article
  • Open Access
23 Citations
3,485 Views
15 Pages

An Analysis of the Dynamical Behaviour of Systems with Fractional Damping for Mechanical Engineering Applications

  • Ondiz Zarraga,
  • Imanol Sarría,
  • Jon García-Barruetabeña and
  • Fernando Cortés

11 December 2019

Fractional derivative models are widely used to easily characterise more complex damping behaviour than the viscous one, although the underlying properties are not trivial. Several studies about the mathematical properties can be found, but are usual...

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Symmetry - ISSN 2073-8994