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Symmetry, Volume 12, Issue 10

2020 October - 170 articles

Cover Story: A D2-symmetric porphyrinoid was designed to assemble three metal ions in a linear array. (S)-Binaphthol subunits embedded in a macrocycle core induced a (P,P)-helical figure-eight ring conformation. The present robust trinuclear metal complexes are expected to have potential applications in materials science, especially relevant to chirality. View this paper
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Articles (170)

  • Article
  • Open Access
2 Citations
2,215 Views
19 Pages

21 October 2020

We show the use of parametrization techniques and successive approximations for the effective construction of solutions of linear boundary value problems for differential systems with multiple argument deviations. The approach is illustrated with a n...

  • Article
  • Open Access
11 Citations
3,348 Views
18 Pages

An Anisotropic Model for the Universe

  • Morgan Le Delliou,
  • Maksym Deliyergiyev and
  • Antonino del Popolo

21 October 2020

Motivated by the back-reaction debate, and some unexplained characteristics of the CMB, we investigate the possibility of some anisotropy in the universe observed around us. To this aim, we build up a novel prediction for the Hubble law for the late...

  • Article
  • Open Access
36 Citations
6,509 Views
15 Pages

An Effective and Improved CNN-ELM Classifier for Handwritten Digits Recognition and Classification

  • Saqib Ali,
  • Jianqiang Li,
  • Yan Pei,
  • Muhammad Saqlain Aslam,
  • Zeeshan Shaukat and
  • Muhammad Azeem

21 October 2020

Optical character recognition is gaining immense importance in the domain of deep learning. With each passing day, handwritten digits (0–9) data are increasing rapidly, and plenty of research has been conducted thus far. However, there is still...

  • Article
  • Open Access
5 Citations
2,730 Views
11 Pages

Circular Intensely Orthogonal Double Cover Design of Balanced Complete Multipartite Graphs

  • M. Higazy,
  • A. El-Mesady,
  • Emad E. Mahmoud and
  • Monagi H. Alkinani

21 October 2020

In this paper, we generalize the orthogonal double covers (ODC) of Kn,n as follows. The circular intensely orthogonal double cover design (CIODCD) of X=Kn,n,,nm is defined as a collection T={G00,G10,,G(n1)0}{G01,G11,&hell...

  • Article
  • Open Access
1 Citations
3,396 Views
21 Pages

21 October 2020

We present a simple reaction model to study the influence of the size, number, and spatial arrangement of reactive patches on a reactant placed on a plane. Specifically, we consider a reactant whose surface has an N × N square grid structure, w...

  • Article
  • Open Access
25 Citations
6,765 Views
16 Pages

Improving the Results of the Earned Value Management Technique Using Artificial Neural Networks in Construction Projects

  • Amirhossein Balali,
  • Alireza Valipour,
  • Jurgita Antucheviciene and
  • Jonas Šaparauskas

21 October 2020

The cost, time and scope of a construction project are key parameters for its success. Thus, predicting these indices is indispensable. Correct and accurate prediction of cost throughout the progress of a project gives project managers the chance to...

  • Article
  • Open Access
19 Citations
4,340 Views
17 Pages

21 October 2020

Joint named entity recognition and relation extraction is an essential natural language processing task that aims to identify entities and extract the corresponding relations in an end-to-end manner. At present, compared with the named entity recogni...

  • Article
  • Open Access
3 Citations
2,535 Views
18 Pages

21 October 2020

Symmetry is one of the important properties of Social networks to indicate the co-existence relationship between two persons, e.g., friendship or kinship. Centrality is an index to measure the importance of vertices/persons within a social network. M...

  • Article
  • Open Access
8 Citations
2,448 Views
7 Pages

21 October 2020

For a complex catalytic reaction with a single-route linear mechanism, a new, kinetico-thermodynamic form of the steady-state reaction rate is obtained, and we show how its symmetries in terms of the kinetic and thermodynamic parameters allow better...

  • Article
  • Open Access
43 Citations
4,162 Views
16 Pages

Error Estimation of the Homotopy Perturbation Method to Solve Second Kind Volterra Integral Equations with Piecewise Smooth Kernels: Application of the CADNA Library

  • Samad Noeiaghdam,
  • Aliona Dreglea,
  • Jihuan He,
  • Zakieh Avazzadeh,
  • Muhammad Suleman,
  • Mohammad Ali Fariborzi Araghi,
  • Denis N. Sidorov and
  • Nikolai Sidorov

20 October 2020

This paper studies the second kind linear Volterra integral equations (IEs) with a discontinuous kernel obtained from the load leveling and energy system problems. For solving this problem, we propose the homotopy perturbation method (HPM). We then d...

  • Article
  • Open Access
2 Citations
2,325 Views
11 Pages

20 October 2020

This work is devoted to the modeling and investigation of the architecture design for the delayed recurrent neural network, based on the delayed differential equations. The usage of discrete and distributed delays makes it possible to model the calcu...

  • Article
  • Open Access
2 Citations
2,329 Views
14 Pages

20 October 2020

We introduce a gradient iterative scheme with an optimal convergent factor for solving a generalized Sylvester matrix equation i=1pAiXBi=F, where Ai,Bi and F are conformable rectangular matrices. The iterative scheme is derived from the gradient...

  • Article
  • Open Access
11 Citations
3,645 Views
25 Pages

20 October 2020

The improvement of the contact state between the surrounding rock and tunnel lining, such as the effect of back-fill grouting behind lining, was important for maintaining the stability of the lining structure. To explore the influence of loose contac...

  • Article
  • Open Access
4 Citations
3,623 Views
23 Pages

20 October 2020

In this paper, we use the classical limit of the Standard-Model Extension to explore some generic features of Lorentz violation. This classical limit is formulated at the level of undergraduate physics. We first discuss the general equations of motio...

  • Article
  • Open Access
4 Citations
2,231 Views
16 Pages

The Fourth Axiom of Similarity Measures

  • Chun-Hsiao Chu,
  • Chih-Ping Yen and
  • Yi-Fong Lin

20 October 2020

In this research, the fourth axiom to improve the well-defined examination of similarity measures is studied, where the measures have a symmetric structure. We first provide a theoretic enhancement of three correlation coefficient similarity measures...

  • Article
  • Open Access
2 Citations
2,053 Views
15 Pages

20 October 2020

Let C0(h) be a subclass of analytic and close-to-convex functions defined in the open unit disk by the formula Re{(1z2)f(z)}>0. In this paper, some coefficient problems for C0(h) are considered. Some properties and bounds of several...

  • Article
  • Open Access
1 Citations
3,312 Views
18 Pages

20 October 2020

The invariants of finite-dimensional representations of simple Lie algebras, such as even-degree indices and anomaly numbers, are considered in the context of the non-crystallographic finite reflection groups H2, H3 and H4. Using a representation-orb...

  • Article
  • Open Access
16 Citations
3,557 Views
16 Pages

20 October 2020

To assess the risk of project cost overrun, it is necessary to consider large amounts of symmetric and asymmetric data. This paper proposes a cost overrun risk prediction model, the structure of which is based on the fuzzy inference model of Mamdani....

  • Article
  • Open Access
11 Citations
3,724 Views
16 Pages

Parameter Estimation and Hypothesis Testing of Multivariate Poisson Inverse Gaussian Regression

  • Selvi Mardalena,
  • Purhadi Purhadi,
  • Jerry Dwi Trijoyo Purnomo and
  • Dedy Dwi Prastyo

20 October 2020

Multivariate Poisson regression is used in order to model two or more count response variables. The Poisson regression has a strict assumption, that is the mean and the variance of response variables are equal (equidispersion). Practically, the varia...

  • Article
  • Open Access
17 Citations
3,217 Views
14 Pages

Design of Desktop Audiovisual Entertainment System with Deep Learning and Haptic Sensations

  • Chien-Hsing Chou,
  • Yu-Sheng Su,
  • Che-Ju Hsu,
  • Kong-Chang Lee and
  • Ping-Hsuan Han

19 October 2020

In this study, we designed a four-dimensional (4D) audiovisual entertainment system called Sense. This system comprises a scene recognition system and hardware modules that provide haptic sensations for users when they watch movies and animations at...

  • Article
  • Open Access
8 Citations
3,243 Views
21 Pages

Algebraic DVR Approaches Applied to Describe the Stark Effect

  • Marisol Bermúdez-Montaña,
  • Marisol Rodríguez-Arcos,
  • Renato Lemus,
  • José M. Arias,
  • Joaquín Gómez-Camacho and
  • Emilio Orgaz

19 October 2020

Two algebraic approaches based on a discrete variable representation are introduced and applied to describe the Stark effect in the non-relativistic Hydrogen atom. One approach consists of considering an algebraic representation of a cutoff 3D harmon...

  • Article
  • Open Access
17 Citations
8,851 Views
22 Pages

19 October 2020

In structural reliability analysis, sensitivity analysis (SA) can be used to measure how an input variable influences the failure probability Pf of a structure. Although the reliability is usually expressed via Pf, Eurocode building design standards...

  • Article
  • Open Access
21 Citations
5,019 Views
22 Pages

19 October 2020

To effectively organize design elements in virtual reality (VR) scene design and provide evaluation methods for the design process, we built a user image space cognitive model. This involved perceptual engineering methods and optimization of the VR i...

  • Article
  • Open Access
25 Citations
2,889 Views
20 Pages

19 October 2020

We obtain new outcomes of analytic functions linked with operator Hα,βη,k(f) defined by Mittag–Leffler function. Moreover, new theorems of differential sandwich-type are obtained.

  • Article
  • Open Access
14 Citations
3,974 Views
19 Pages

19 October 2020

Object selection is the basis of natural user–computer interaction (NUI) in a virtual environment (VE). Among the three-dimensional object selection techniques employed in virtual reality (VR), bare hand-based finger clicking interaction and ra...

  • Article
  • Open Access
9 Citations
6,848 Views
23 Pages

19 October 2020

The parking assist system (PAS) provides information of parking slots around the vehicle. As the demand for an autonomous system is increasing, intelligent PAS has been developed to park the vehicle without the driver’s intervention. To locate...

  • Article
  • Open Access
3 Citations
3,433 Views
17 Pages

19 October 2020

System performance and efficiency depends on the stability criteria. The lower limb prosthetic model design requires some prerequisites such as hardware design functionality and compatibility of the building block materials. Effective implementation...

  • Article
  • Open Access
4 Citations
2,037 Views
10 Pages

Optimal and Nonoptimal Gronwall Lemmas

  • Daniela Marian,
  • Sorina Anamaria Ciplea and
  • Nicolaie Lungu

19 October 2020

In this paper, we study some optimal inequalities of the Riccati type and of the Bihari type. We also consider nonoptimal inequalities of the Wendorf type. At the same time, we get a partial answer to Problems 5 and 9, formulated by I. A. Rus. This p...

  • Article
  • Open Access
18 Citations
5,831 Views
15 Pages

19 October 2020

Relation classification is an important research area in the field of natural language processing (NLP), which aims to recognize the relationship between two tagged entities in a sentence. The noise caused by irrelevant words and the word distance be...

  • Review
  • Open Access
4 Citations
2,815 Views
13 Pages

19 October 2020

We have used the fluorescence detection of phase transformation dynamics of organic compounds by photochemical methods to observe a real-time symmetry breaking process. The organic fluorescent molecules vary the fluorescence spectra depending on mole...

  • Article
  • Open Access
18 Citations
3,995 Views
22 Pages

A Novel Framework Using Neutrosophy for Integrated Speech and Text Sentiment Analysis

  • Kritika Mishra,
  • Ilanthenral Kandasamy,
  • Vasantha Kandasamy W. B. and
  • Florentin Smarandache

18 October 2020

With increasing data on the Internet, it is becoming difficult to analyze every bit and make sure it can be used efficiently for all the businesses. One useful technique using Natural Language Processing (NLP) is sentiment analysis. Various algorithm...

  • Article
  • Open Access
10 Citations
2,465 Views
19 Pages

More on Hölder’s Inequality and It’s Reverse via the Diamond-Alpha Integral

  • M. Zakarya,
  • H. A. Abd El-Hamid,
  • Ghada AlNemer and
  • H. M. Rezk

18 October 2020

In this paper, we investigate some new generalizations and refinements for Hölder’s inequality and it’s reverse on time scales through the diamond-α dynamic integral, which is defined as a linear combination of the delta and na...

  • Article
  • Open Access
10 Citations
4,205 Views
18 Pages

18 October 2020

When exposed to temperatures that are progressively and rapidly raised, large dimension fibre cement boards tend to crack. This occurrence is analysed and explained for a specific issue of asymmetric growth of a curvilinear crack in high temperatures...

  • Feature Paper
  • Article
  • Open Access
3 Citations
4,322 Views
23 Pages

17 October 2020

In Diels–Alder reactions, 2H-pyran-2-ones as dienes can yield a large variety of cycloadducts with up to four contiguous carbon stereogenic centers. Some of the potentially most useful, however difficult to prepare due to their low thermal stab...

  • Article
  • Open Access
6 Citations
3,130 Views
18 Pages

Asymmetric Contributions of the Fronto-Parietal Network to Emotional Conflict in the Word–Face Interference Task

  • Francesca De Luca,
  • Manuel Petrucci,
  • Bianca Monachesi,
  • Michal Lavidor and
  • Anna Pecchinenda

16 October 2020

The fronto-parietal network is involved in top-down and bottom-up processes necessary to achieve cognitive control. We investigated the role of asymmetric enhancement of the left dorsolateral prefrontal cortex (lDLPFC) and right posterior parietal co...

  • Article
  • Open Access
7 Citations
2,610 Views
14 Pages

PT -Symmetric Qubit-System States in the Probability Representation of Quantum Mechanics

  • Vladimir N. Chernega,
  • Margarita A. Man’ko and
  • Vladimir I. Man’ko

16 October 2020

PT-symmetric qubit-system states are considered in the probability representation of quantum mechanics. The new energy eigenvalue equation for probability distributions identified with qubit and qutrit states is presented in an explicit form. A possi...

  • Article
  • Open Access
6 Citations
2,671 Views
12 Pages

16 October 2020

Experimental, latitudinal, and historical approaches have been used to explore and/or predict the effects of global change on biota, and each approach has its own advantages and disadvantages. The weaknesses of these individual approaches can, potent...

  • Article
  • Open Access
19 Citations
3,443 Views
14 Pages

16 October 2020

This work is devoted to the second order rational Bézier curve coefficients estimation. We present the methodology of unique coefficients for each type of ship computation. In the presented formulas of ship’s length, a draft and angular...

  • Review
  • Open Access
121 Citations
18,540 Views
26 Pages

16 October 2020

Many image processing, computer graphics, and computer vision problems can be treated as image-to-image translation tasks. Such translation entails learning to map one visual representation of a given input to another representation. Image-to-image t...

  • Article
  • Open Access
12 Citations
7,093 Views
23 Pages

16 October 2020

This paper presents a modeling and simulation approach in order to perform a generative analysis of folktales aimed at validating Claude Lévi-Strauss’ theory and method. To this aim, a discrete-event simulation is proposed. The simulation is based on...

  • Article
  • Open Access
3 Citations
1,848 Views
10 Pages

16 October 2020

This paper is devoted to a generalization of the well-known Fekete-Szegö type coefficients problem for holomorphic functions of a complex variable onto holomorphic functions of several variables. The considerations concern three families of such...

  • Article
  • Open Access
12 Citations
2,839 Views
24 Pages

16 October 2020

λ0-measure is a special type of fuzzy measure. In the context of multi-attribute decision making (MADM), the measure can be used together with Choquet integral to model the interdependencies that usually present between the decision attributes...

  • Article
  • Open Access
27 Citations
3,886 Views
20 Pages

Appropriate Feature Set and Window Parameters Selection for Efficient Motion Intent Characterization towards Intelligently Smart EMG-PR System

  • Mojisola Grace Asogbon,
  • Oluwarotimi Williams Samuel,
  • Yanbing Jiang,
  • Lin Wang,
  • Yanjuan Geng,
  • Arun Kumar Sangaiah,
  • Shixiong Chen,
  • Peng Fang and
  • Guanglin Li

16 October 2020

The constantly rising number of limb stroke survivors and amputees has motivated the development of intelligent prosthetic/rehabilitation devices for their arm function restoration. The device often integrates a pattern recognition (PR) algorithm tha...

  • Article
  • Open Access
9 Citations
2,658 Views
14 Pages

Nordhaus–Gaddum-Type Results for the Steiner Gutman Index of Graphs

  • Zhao Wang,
  • Yaping Mao,
  • Kinkar Chandra Das and
  • Yilun Shang

16 October 2020

Building upon the notion of the Gutman index SGut(G), Mao and Das recently introduced the Steiner Gutman index by incorporating Steiner distance for a connected graph G. The Steiner Gutman k-index SGutk(G) of G is defined by SGutk(G)=SV(G)...

  • Review
  • Open Access
19 Citations
6,596 Views
37 Pages

16 October 2020

Background: Brain cortical activity in resting electroencephalogram (EEG) recordings can be considered as measures of latent individual disposition to approach/avoidance behavior. This systematic review aims to provide an updated overview of the rela...

  • Article
  • Open Access
36 Citations
3,308 Views
19 Pages

16 October 2020

Saline soil is a widely distributed special soil with poor engineering properties. In seasonally frozen regions, the poor properties of saline soil will cause many types of engineering damage such as road boiling, melt sinking, and subgrade instabili...

  • Article
  • Open Access
29 Citations
4,865 Views
22 Pages

16 October 2020

Numerical investigations are performed on the magnetohydrodynamic (MHD) pump-based microchannel cooling system for heat dissipating element. In the present study, the MHD pump performance is evaluated considering normal current density, magnetic flux...

  • Feature Paper
  • Article
  • Open Access
6 Citations
3,486 Views
16 Pages

15 October 2020

The effect of the direction of external horizontal magnetic fields on the linear stability of natural convection of liquid metal in an infinitely long vertical rectangular enclosure is numerically studied. A vertical side wall is heated and the oppos...

  • Article
  • Open Access
5 Citations
2,606 Views
20 Pages

15 October 2020

Hepatitis B is a widespread epidemic in the world, but so far no single drug has been shown to kill or eliminate the Hepatitis B virus and heal people with chronic Hepatitis B virus infection. Based on comprehensive investigations to relevant charact...

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Symmetry - ISSN 2073-8994