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Open AccessEditorial

Symmetry in Engineering Sciences

Department of Engineering, University of Almeria, ceiA3, 04120 Almeria, Spain
*
Author to whom correspondence should be addressed.
Symmetry 2019, 11(6), 797; https://doi.org/10.3390/sym11060797
Received: 13 June 2019 / Revised: 13 June 2019 / Accepted: 13 June 2019 / Published: 15 June 2019
(This article belongs to the Special Issue Symmetry in Engineering Sciences)

Abstract

The symmetry concept is mainly used in two senses. The first from the aesthetic point of view of proportionality or harmony, since human beings seek symmetry in nature. Or the second, from an engineering point of view to attend to geometric regularities or to explain a repetition process or pattern in a given phenomenon. This special issue dedicated to geometry in engineering deals with this last concept, which aims to collect both the aspects of geometric solutions in engineering, which may even have a certain aesthetic character, and the aspect of the use of patterns that explain observed phenomena.
Keywords: asymmetry; synchronization; topology; electrical circuits; electronic devices; mechanical structures; robots; graphic modelling; complex networks; optimization; computing applications asymmetry; synchronization; topology; electrical circuits; electronic devices; mechanical structures; robots; graphic modelling; complex networks; optimization; computing applications

1. Introduction

Symmetry is a frequent pattern widely studied in different research fields. In particular, complex systems with symmetry arise in engineering science (e.g., in mechanical engineering, symmetric and synchronized systems are often used to satisfy stability criteria for rotating structures; in electrical engineering, the study of symmetrical and asymmetrical faults in power systems is a critical issue; in telecommunications engineering, many systems are symmetrical since data speed or quantity is the same in both directions; in civil engineering, the strength of the objects depend on the symmetry; in computer engineering, symmetric network structures and symmetric algorithms are often studied, etc.).
This Special Issue invites researchers to submit original research papers and review articles related to any engineering discipline where theoretical or practical issues of symmetry are considered. The topics of interest include, but are not limited to:
  • Symmetry in electrical and electronic engineering
  • Symmetry in mechanical engineering
  • Symmetry in automation and robotic engineering
  • Symmetry in computer engineering
  • Symmetry in telecommunications engineering
  • Symmetry in civil engineering (transportation, hydraulics, etc.)
  • Symmetry in chemical engineering
  • Symmetry and topology of complex networks in engineering
  • Symmetry and optimization in engineering applications

2. Statistics of the Special Issue

The statistics of the call for papers for this special issue related to published or rejected items was: Total submissions (19), Published (12; 73%), and Rejected (7; 27%).
The authors’ geographical distribution by country for published papers is shown in Table 1, where it is possible to observe 45 authors from five different countries. Note that it is usual for an article to be signed by more than one author and for authors to collaborate with others of different affiliations.

3. Authors of this Special Issue

The authors of this special issue and their main affiliations are summarized in Table 2, where there are four authors on average per manuscript.

4. Brief Overview of the Contributions to This Special Issue

The analysis of the topics (Table 3) identifies or summarizes the research undertaken. This section classifies the manuscripts according to the topics proposed in the special issue. It was observed that there are four topics that have dominated the others: Symmetry in electrical and electronic engineering; Symmetry in mechanical engineering; Symmetry in computer engineering; and Symmetry in civil engineering (transportation).

Author Contributions

All authors contributed equally to this work.

Conflicts of Interest

The authors declare no conflict of interest.

References

  1. Velilla, C.; Alcayde, A.; San-Antonio-Gómez, C.; Montoya, F.G.; Zavala, I.; Manzano-Agugliaro, F. Rampant Arch and Its Optimum Geometrical Generation. Symmetry 2019, 11, 627. [Google Scholar] [CrossRef]
  2. Rojas-Sola, J.I.; la Morena-De la Fuente, D. The Hay Inclined Plane in Coalbrookdale (Shropshire, England): Geometric Modeling and Virtual Reconstruction. Symmetry 2019, 11, 589. [Google Scholar] [CrossRef]
  3. Zhang, Y.; Zhu, Y.; Li, X.; Wang, X.; Guo, X. Anomaly Detection Based on Mining Six Local Data Features and BP Neural Network. Symmetry 2019, 11, 571. [Google Scholar] [CrossRef]
  4. Iqbal, N.; Ali, S.; Khan, I.; Lee, B.M. Adaptive Edge Preserving Weighted Mean Filter for Removing Random-Valued Impulse Noise. Symmetry 2019, 11, 395. [Google Scholar] [CrossRef]
  5. Wang, L.; Zhou, D.; Tian, H.; Zhang, H.; Zhang, W. Parametric Fault Diagnosis of Analog Circuits Based on a Semi-Supervised Algorithm. Symmetry 2019, 11, 228. [Google Scholar] [CrossRef]
  6. Wang, Y.; Ye, H.; Jiang, X.; Tian, A. A Prediction Method for the Damping Effect of Ring Dampers Applied to Thin-Walled Gears Based on Energy Method. Symmetry 2018, 10, 677. [Google Scholar] [CrossRef]
  7. Chalupa, D.; Mikulka, J. A Novel Tool for Supervised Segmentation Using 3D Slicer. Symmetry 2018, 10, 627. [Google Scholar] [CrossRef]
  8. Ruan, K.; Zhang, Q. Accessibility Evaluation of High Order Urban Hospitals for the Elderly: A Case Study of First-Level Hospitals in Xi’an, China. Symmetry 2018, 10, 489. [Google Scholar] [CrossRef]
  9. Zhang, H.Y.; Lin, W.M.; Chen, A.X. Path Planning for the Mobile Robot: A Review. Symmetry 2018, 10, 450. [Google Scholar] [CrossRef]
  10. Liu, S.; Lin, B.; Wu, J.; Zhao, Y. Modeling the Service Network Design Problem in Railway Express Shipment Delivery. Symmetry 2018, 10, 391. [Google Scholar] [CrossRef]
  11. Zheng, J.; Yuan, Y.; Zou, L.; Deng, W.; Guo, C.; Zhao, H. Study on a Novel Fault Diagnosis Method Based on VMD and BLM. Symmetry 2019, 11, 747. [Google Scholar] [CrossRef]
  12. Qu, Z.; He, S. A Time-Space Network Model Based on a Train Diagram for Predicting and Controlling the Traffic Congestion in a Station Caused by an Emergency. Symmetry 2019, 11, 780. [Google Scholar] [CrossRef]
Table 1. Geographic distribution by the country of author.
Table 1. Geographic distribution by the country of author.
CountryNumber of Authors
China31
Spain8
Pakistan3
Czech Republic2
Korea1
Total45
Table 2. Affiliations and bibliometric indicators for the authors.
Table 2. Affiliations and bibliometric indicators for the authors.
AuthorMain AffiliationReference
Cristina VelillaUniversidad Politécnica de Madrid[1]
Alfredo AlcaydeUniversity of Almeria[1]
Carlos San-Antonio-GómezUniversidad Politécnica de Madrid[1]
Francisco G. MontoyaUniversity of Almeria[1]
Ignacio ZavalaUniversidad Politécnica de Madrid[1]
Francisco Manzano-AgugliaroUniversity of Almeria[1]
José Ignacio Rojas-SolaUniversity of Jaen[2]
Eduardo De la Morena-De la FuenteUniversity of Jaen[2]
Yu ZhangSouth China University of Technology[3]
Yuanpeng ZhuSouth China University of Technology[3]
Xuqiao LiSouth China University of Technology[3]
Xiaole WangSouth China University of Technology[3]
Xutong GuoSouth China University of Technology[3]
Nasar IqbalUniversity of Engineering and Technology[4]
Sadiq AliUniversity of Engineering and Technology[4]
Imran KhanUniversity of Engineering and Technology[4]
Byung Moo LeeSejong University[4]
Ling WangHenan Agricultural University[5]
Dongfang ZhouNational Digital Switching System Engineering and Technology R&D Center (NDSC)[5]
Hui TianHenan Agricultural University[5]
Hao ZhangHenan Agricultural University[5]
Wei ZhangHenan Agricultural University[5]
Yanrong WangBeihang University[6]
Hang YeBeihang University[6]
Xianghua JiangBeihang University[6]
Aimei TianBeihang University[6]
Daniel ChalupaBrno University of Technology[7]
Jan MikulkaBrno University of Technology[7]
Ke RuanXi’an University of Architecture and Technology[8]
Qi ZhangXi’an University of Architecture and Technology[8]
Han-ye ZhangJiujiang University[9]
Wei-ming LinJiujiang University[9]
Ai-xia ChenJiujiang University[9]
Siqi LiuBeijing Jiaotong University[10]
Boliang LinBeijing Jiaotong University[10]
Jianping WuBeijing Jiaotong University[10]
Yinan ZhaoBeijing Jiaotong University[10]
Jianjie ZhengDalian Jiaotong University[11]
Yu YuanDalian Jiaotong University[11]
Li ZouDalian Jiaotong University[11]
Wu DengDalian Jiaotong University[11]
Chen GuoDalian Jiaotong University[11]
Huimin ZhaoDalian Jiaotong University[11]
Zihan QuBeijing Jiaotong University[12]
Shiwei HeBeijing Jiaotong University[12]
Table 3. Topic analysis.
Table 3. Topic analysis.
TopicNumber of Manuscripts
Symmetry in electrical and electronic engineering2
Symmetry in mechanical engineering2
Symmetry in computer engineering2
Symmetry in civil engineering (transportation, hydraulics, etc.)2
Symmetry in automation and robotic engineering1
Symmetry in telecommunications engineering1
Symmetry and topology of complex networks in engineering1
Symmetry and optimization in engineering applications1
Total12
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