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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
49 Citations
6,095 Views
16 Pages

15 December 2019

Nowadays, eyeglassesare used for vision correction as well as in the fashion industry. Eyeglasses have become more expensive and the eyewear industry has grown rapidly, thereby requiring the development of advanced coating technologies. However, defe...

  • Article
  • Open Access
6 Citations
3,220 Views
23 Pages

Nonlinear Consensus Protocol Modified from Doubly Stochastic Quadratic Operators in Networks of Dynamic Agents

  • Rawad Abdulghafor,
  • Sultan Almotairi,
  • Hamad Almohamedh,
  • Sherzod Turaev and
  • Badr Almutairi

15 December 2019

This article explores nonlinear convergence to limit the effects of the consensus problem that usually occurs in multi-agent systems. Most of the existing research essentially considers the outline of linear protocols, using complex mathematical equa...

  • Article
  • Open Access
7 Citations
2,914 Views
19 Pages

15 December 2019

The influence of entropy generation on aligned magnetic flow-including nanoparticles through a convectively heated radial stretched surface in the existence of Cattaneo–Christov heat flux is inspected. The highly nonlinear leading PDE’s v...

  • Article
  • Open Access
2 Citations
2,590 Views
10 Pages

14 December 2019

In this paper, the original C Q algorithm, the relaxed C Q algorithm, the gradient projection method ( G P M ) algorithm, and the subgradient projection method ( S P M ) algorithm for the convex split feasibility problem a...

  • Article
  • Open Access
8 Citations
2,842 Views
13 Pages

New Results on Neutrosophic Extended Triplet Groups Equipped with a Partial Order

  • Xin Zhou,
  • Ping Li,
  • Florentin Smarandache and
  • Ahmed Mostafa Khalil

13 December 2019

Neutrosophic extended triplet group (NETG) is a novel algebra structure and it is different from the classical group. The major concern of this paper is to present the concept of a partially ordered neutrosophic extended triplet group (po-NETG), whic...

  • Article
  • Open Access
6 Citations
2,486 Views
15 Pages

13 December 2019

By considering the interaction between a two-atom system and the vacuum massless scalar field in the viewpoint of an instantaneously inertial observer, we study the rates of transition of a uniformly accelerated two-atom system in the symmetric/antis...

  • Article
  • Open Access
6 Citations
4,230 Views
18 Pages

13 December 2019

This paper studies control strategies for adaptive cruise control (ACC) systems in battery electric vehicles (BEVs). A hierarchical control structure is adopted for the ACC system, and the structure contains an upper controller and a lower controller...

  • Article
  • Open Access
3 Citations
3,718 Views
17 Pages

Multivariate Skew-Power-Normal Distributions: Properties and Associated Inference

  • Guillermo Martínez-Flórez,
  • Artur J. Lemonte and
  • Hugo S. Salinas

12 December 2019

The univariate power-normal distribution is quite useful for modeling many types of real data. On the other hand, multivariate extensions of this univariate distribution are not common in the statistic literature, mainly skewed multivariate extension...

  • Feature Paper
  • Review
  • Open Access
20 Citations
5,949 Views
31 Pages

12 December 2019

Benzopyran and benzodihydropyran (chromane) nuclei are the core structure of many natural products, in particular flavonoids. Many compounds possessing this structure are nutraceuticals, pharmaceutical nutrients. Therefore, benzopyran and chromane sc...

  • Article
  • Open Access
18 Citations
5,693 Views
20 Pages

12 December 2019

The double pendulum type gantry crane is a typical symmetry underactuated motion system. It has control problems in that the swing of the payload is difficult to suppress and the precise positioning of the trolley is not accurate. A new nonlinear cou...

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Symmetry - ISSN 2073-8994