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Stability Analysis and Cauchy Matrix of a Mathematical Model of Hepatitis B Virus with Control on Immune System near Neighborhood of Equilibrium Free Point Symmetry (IF 2.645) Pub Date : 2021-01-22 Irina Volinsky; Salvo Danilo Lombardo; Paz Cheredman
Mathematical models are useful tools to describe the dynamics of infection and predict the role of possible drug combinations. In this paper, we present an analysis of a hepatitis B virus (HBV) model including cytotoxic T lymphocytes (CTL) and antibody responses, under distributed feedback control, expressed as an integral form to predict the effect of a combination treatment with interleukin-2 (IL-2)
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Toward Applications of Linear Control Systems on the Real World and Theoretical Challenges Symmetry (IF 2.645) Pub Date : 2021-01-22 Víctor Ayala; María Torreblanca; William Valdivia
Many significant real world challenges arise as optimization problems on different classes of control systems. In particular, ordinary differential equations with symmetries. The purpose of this review article is twofold. First, we give the information we have about the class of Linear Control Systems ΣG on a low dimension matrix Lie group G. Second, we invite the Mathematical community to consider
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Fuzzy Interpolation with Extensional Fuzzy Numbers Symmetry (IF 2.645) Pub Date : 2021-01-22 Michal Holčapek; Nicole Škorupová; Martin Štěpnička
The article develops further directions stemming from the arithmetic of extensional fuzzy numbers. It presents the existing knowledge of the relationship between the arithmetic and the proposed orderings of extensional fuzzy numbers—so-called S-orderings—and investigates distinct properties of such orderings. The desirable investigation of the S-orderings of extensional fuzzy numbers is directly used
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A New Optimized Solution for A Flexible Coupling with Bolts Used in the Mechanical Transmissions Symmetry (IF 2.645) Pub Date : 2021-01-22 Marilena Ghiţescu; Ion-Marius Ghiţescu; Paul Nicolae Borza; Sorin Vlase
The paper presents a new constructive and functional solution of flexible coupling with bolts and nonmetallic intermediary elements. The bolts have a special shape in the sense that they have a milled area on a certain length equal to the width of the non-metallic element, a cylindrical area that reduces the stress concentrators at the diameter passages. The novelty of this coupling consists of the
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Research on Decoupling of Parallel Six-Axis Force/Torque Sensor Based on an Independent Component Analysis Symmetry (IF 2.645) Pub Date : 2021-01-22 Zhijun Wang; Lu Liu; Kai Wang; Jing He; Zhanxian Li
This study proposes a parallel six-axis force/torque sensor decoupling method based on an independent component analysis (ICA), and the experimental platform is built for experimental exploration. First of all, the structural model and mathematical model of the parallel six-axis force/torque sensor are introduced, which is composed of single-dimensional force sensors with central symmetry. Secondly
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Sensitivity Analysis of Rigid Pavement Design Based on Semi-Empirical Methods: Romanian Case Study Symmetry (IF 2.645) Pub Date : 2021-01-22 Costel Pleșcan; Elena-Loredana Pleșcan; Mariana D. Stanciu; Marius Botiș; Daniel Taus
Due to the intensive process of road construction or rehabilitation of pavement caused by an increase in traffic volume, in the field of rigid pavement design and research in Romania, we can say that there is a need to improve the design method. In the last decade, more and more researchers have been concerned about climate change and the increase in traffic volume; hence, there is a need for a renewal
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Gauss–Bonnet Theorems in the Lorentzian Heisenberg Group and the Lorentzian Group of Rigid Motions of the Minkowski Plane Symmetry (IF 2.645) Pub Date : 2021-01-22 Sining Wei; Yong Wang
The aim of this paper was to obtain Gauss–Bonnet theorems on the Lorentzian Heisenberg group and the Lorentzian group of rigid motions of the Minkowski plane. At the same time, the sub-Lorentzian limits of Gaussian curvature for surfaces which are C2-smooth in the Lorentzian Heisenberg group away from characteristic points and signed geodesic curvature for curves which are C2-smooth on surfaces are
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Lie Symmetry Group for Unsteady Free Convection Boundary-Layer Flow over a Vertical Surface Symmetry (IF 2.645) Pub Date : 2021-01-22 Mina B. Abd-el-Malek; Nagwa A. Badran; Amr M. Amin; Anood M. Hanafy
The Lie symmetry group transformation method was used to investigate the partial differential equations that model the motion of a natural convective unsteady flow past to a non-isothermal vertical flat surface. The one-parameter Lie group transformation was applied twice consecutively to convert the motion governing equations into a system of ordinary differential equations. The obtained system of
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Some Identities of the Degenerate Higher Order Derangement Polynomials and Numbers Symmetry (IF 2.645) Pub Date : 2021-01-22 Hye Kyung Kim
Recently, Kim-Kim (J. Math. Anal. Appl. (2021), Vol. 493(1), 124521) introduced the λ-Sheffer sequence and the degenerate Sheffer sequence. In addition, Kim et al. (arXiv:2011.08535v1 17 November 2020) studied the degenerate derangement polynomials and numbers, and investigated some properties of those polynomials without using degenerate umbral calculus. In this paper, the y the degenerate derangement
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Extending Friedmann Equations Using Fractional Derivatives Using a Last Step Modification Technique: The Case of a Matter Dominated Accelerated Expanding Universe Symmetry (IF 2.645) Pub Date : 2021-01-22 Ernesto Barrientos; Sergio Mendoza; Pablo Padilla
We present a toy model for extending the Friedmann equations of relativistic cosmology using fractional derivatives. We do this by replacing the integer derivatives, in a few well-known cosmological results with fractional derivatives leaving their order as a free parameter. All this with the intention to explain the current observed acceleration of the Universe. We apply the Last Step Modification
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Color Revolution: A Novel Operator for Imperialist Competitive Algorithm in Solving Cloud Computing Service Composition Problem Symmetry (IF 2.645) Pub Date : 2021-01-22 Amin Jula; Elankovan A. Sundararajan; Zalinda Othman; Narjes Khatoon Naseri
In this paper, a novel high-performance and low-cost operator is proposed for the imperialist competitive algorithm (ICA). The operator, inspired by a sociopolitical movement called the color revolution that has recently arisen in some countries, is referred to as the color revolution operator (CRO). The improved ICA with CRO, denoted as ICACRO, is significantly more efficient than the ICA. On the
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Solid Particle Erosion Area of Rotor Blades: Application on Small-Size Unmanned Helicopters Symmetry (IF 2.645) Pub Date : 2021-01-22 Yongming Yao; Xupeng Bai; Huiying Liu; Tianyu Li; Jianbo Liu; Guangli Zhou
Rotor blades play an important role in unmanned helicopters, and it is of great significance to study the erosion of rotor blades. In this study, titanium alloy (Ti-4Al-1.5Mn) was used as the helicopter rotor blades’ surface material. The commercial software Ansys-Fluent 18.0 was mainly used to study the erosion of solid particles on the helicopter rotor blades. The moving mesh method and the discrete
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Probability Axioms and Set Theory Paradoxes Symmetry (IF 2.645) Pub Date : 2021-01-22 Ari Herman; John Caughman
In this paper, we show that Zermelo–Fraenkel set theory with Choice (ZFC) conflicts with basic intuitions about randomness. Our background assumptions are the Zermelo–Fraenekel axioms without Choice (ZF) together with a fragment of Kolmogorov’s probability theory. Using these minimal assumptions, we prove that a weak form of Choice contradicts two common sense assumptions about probability—both based
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Chaotic Discrete Fractional-Order Food Chain Model and Hybrid Image Encryption Scheme Application Symmetry (IF 2.645) Pub Date : 2021-01-21 Sameh Askar; Abdulrahman Al-khedhairi; Amr Elsonbaty; Abdelalim Elsadany
Using the discrete fractional calculus, a novel discrete fractional-order food chain model for the case of strong pressure on preys map is proposed. Dynamical behaviors of the model involving stability analysis of its equilibrium points, bifurcation diagrams and phase portraits are investigated. It is demonstrated that the model can exhibit a variety of dynamical behaviors including stable steady states
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Phishing for (Quantum-Like) Phools —Theory and Experimental Evidence ‡ Symmetry (IF 2.645) Pub Date : 2021-01-21 Ariane Lambert-Mogiliansky; Adrian Calmettes
Quantum-like decision theory is by now a theoretically well-developed field (see e.g., Danilov, Lambert-Mogiliansky & Vergopoulos, 2018). We provide a first test of the predictions of an application of this approach to persuasion. One remarkable result entails that, in contrast to Bayesian persuasion, distraction rather than relevant information has a powerful potential to influence decision-making
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Fault Diagnosis of High-Speed Brushless Permanent-Magnet DC Motor Based on Support Vector Machine Optimized by Modified Grey Wolf Optimization Algorithm Symmetry (IF 2.645) Pub Date : 2021-01-21 Ling-Ling Li; Jia-Qi Liu; Wei-Bing Zhao; Lei Dong
With the development of reliability theory, people realized that “absolutely reliable” machines could not be made. With its incomparable advantages, the high-speed permanent-magnet brushless DC motor is usually used in the symmetrical structure of high-speed operation working systems, which at present are widely used in aerospace and other fields. The structure of the manufacturing process involves
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Nucleon Structure and Spin Effects in Elastic Hadron Scattering Symmetry (IF 2.645) Pub Date : 2021-01-21 Oleg Selyugin
Soft diffraction phenomena in elastic nucleon scattering are considered from the viewpoint of the spin dependence of the interaction potential. Spin-dependent pomeron effects are analyzed for elastic pp scattering, and spin-dependent differential cross sections and spin correlation parameters are calculated. The spin correlation parameter AN is examined on the basis of experimental data from s=4.9
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A Compression Resistant Steganography Based on Differential Manchester Code Symmetry (IF 2.645) Pub Date : 2021-01-21 Shuai Wang; Ning Zheng; Ming Xu
In the field of image steganography research, more and more attention is paid to the importance of stego image robustness. In order to make steganography accessible from laboratory to practical applications, it becomes critical that the stego images can resist JPEG compression from transmission channel. In this paper, an image steganography algorithm with strong robustness to resist JPEG compression
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Unusual Temperature Evolution of Quasiparticle Band Dispersion in Electron-Doped FeSe Films Symmetry (IF 2.645) Pub Date : 2021-01-20 Kosuke Nakayama; Koshin Shigekawa; Katsuaki Sugawara; Takashi Takahashi; Takafumi Sato
The discovery of high-temperature (high-Tc) superconductivity in one-monolayer FeSe on SrTiO3 has attracted tremendous attention. Subsequent studies suggested the importance of cooperation between intra-FeSe-layer and interfacial interactions to enhance Tc. However, the nature of intra-FeSe-layer interactions, which would play a primary role in determining the pairing symmetry, remains unclear. Here
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Secure the IoT Networks as Epidemic Containment Game Symmetry (IF 2.645) Pub Date : 2021-01-20 Juntao Zhu; Hong Ding; Yuchen Tao; Zhen Wang; Lanping Yu
The spread of a computer virus among the Internet of Things (IoT) devices can be modeled as an Epidemic Containment (EC) game, where each owner decides the strategy, e.g., installing anti-virus software, to maximize his utility against the susceptible-infected-susceptible (SIS) model of the epidemics on graphs. The EC game’s canonical solution concepts are the Minimum/Maximum Nash Equilibria (MinNE/MaxNE)
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Small-Signal Stability of Multi-Converter Infeed Power Grids with Symmetry Symmetry (IF 2.645) Pub Date : 2021-01-20 Jiawei Yu; Ziqian Yang; Jurgen Kurths; Meng Zhan
Traditional power systems have been gradually shifting to power-electronic-based ones, with more power electronic devices (including converters) incorporated recently. Faced with much more complicated dynamics, it is a great challenge to uncover its physical mechanisms for system stability and/or instability (oscillation). In this paper, we first establish a nonlinear model of a multi-converter power
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Existence of the Solutions of Nonlinear Fractional Differential Equations Using the Fixed Point Technique in Extended b-Metric Spaces Symmetry (IF 2.645) Pub Date : 2021-01-20 Liliana Guran; Monica-Felicia Bota
The purpose of this paper is to prove fixed point theorems for cyclic-type operators in extended b-metric spaces. The well-posedness of the fixed point problem and limit shadowing property are also discussed. Some examples are given in order to support our results, and the last part of the paper considers some applications of the main results. The first part of this section is devoted to the study
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Generalized Bessel Functions and Their Use in Bremsstrahlung and Multi-Photon Processes Symmetry (IF 2.645) Pub Date : 2021-01-20 Giuseppe Dattoli; Emanuele Di Palma; Silvia Licciardi; Elio Sabia
The theory of Generalized Bessel Functions is reviewed and their application to various problems in the study of electro-magnetic processes is presented. We consider the cases of emission of bremsstrahlung radiation by ultra-relativistic electrons in linearly polarized undulators, including also exotic configurations, aimed at enhancing the harmonic content of the emitted radiation. The analysis is
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Symmetry Transformations in Metazoan Evolution and Development Symmetry (IF 2.645) Pub Date : 2021-01-20 Valeria V. Isaeva; Nickolay V. Kasyanov
In this review, we consider transformations of axial symmetry in metazoan evolution and development, the genetic basis, and phenotypic expressions of different axial body plans. In addition to the main symmetry types in metazoan body plans, such as rotation (radial symmetry), reflection (mirror and glide reflection symmetry), and translation (metamerism), many biological objects show scale (fractal)
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Stability Analysis of an LTI System with Diagonal Norm Bounded Linear Differential Inclusions Symmetry (IF 2.645) Pub Date : 2021-01-19 Mutti-Ur Rehman; Sohail Iqbal; Jehad Alzabut; Rami Ahmad El-Nabulsi
In this article, we present a stability analysis of linear time-invariant systems in control theory. The linear time-invariant systems under consideration involve the diagonal norm bounded linear differential inclusions. We propose a methodology based on low-rank ordinary differential equations. We construct an equivalent time-invariant system (linear) and use it to acquire an optimization problem
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A Unified Mathematical Formalism for First to Third Order Dielectric Response of Matter: Application to Surface-Specific Two-Colour Vibrational Optical Spectroscopy Symmetry (IF 2.645) Pub Date : 2021-01-19 Christophe Humbert; Thomas Noblet
To take advantage of the singular properties of matter, as well as to characterize it, we need to interact with it. The role of optical spectroscopies is to enable us to demonstrate the existence of physical objects by observing their response to light excitation. The ability of spectroscopy to reveal the structure and properties of matter then relies on mathematical functions called optical (or dielectric)
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The Symmetric Nature of the Position Distribution of the Human Body Center of Gravity during Propelling Manual Wheelchairs with Innovative Propulsion Systems Symmetry (IF 2.645) Pub Date : 2021-01-19 Bartosz Wieczorek; Mateusz Kukla; Łukasz Warguła
Objective: The main objective of the tests conducted was to analyze the position variability of the human body’s center of gravity during propelling the wheelchair, and to demonstrate the properties enabling the description of this variability by means of plane figures with a symmetry axis. A secondary objective was to show the impact of the used manual propulsion type and the wheelchair inclination
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Comparison of Body Composition Monitor and InBody 720 Bioimpedance Devices for Body Composition Estimation in Hemodialysis Patients and Healthy Controls Symmetry (IF 2.645) Pub Date : 2021-01-18 Maja Pajek; Vedrana Sember; Ivan Čuk; Jožef Šimenko; Jernej Pajek
Bioelectric impedance devices have become a standard of care not only for peritoneal dialysis but also for hemodialysis patients. We compared the most important body composition variables (extracellular water, intracellular water, total body water and fat mass) measured with the multifrequency bioelectric impedance device InBody 720 (MF-BIA) and bioimpedance spectroscopy body composition monitor Fresenius
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Dynamics of Cardiovascular Muscle Using a Non-Linear Symmetric Oscillator Symmetry (IF 2.645) Pub Date : 2021-01-18 Soumyendu Bhattacharjee; Aishwarya Banerjee; Amit Rakshit; Swapan Bhattacharyya; Swati Chowdhuri; Biswajit Sarkar; Biswarup Neogi
In this paper, a complete non-linear symmetric oscillator model using the Hamiltonian approach has been developed and used to describe the cardiovascular conduction process’s dynamics, as the signal generated from the cardiovascular muscle is non-deterministic and random. Electrocardiogram (ECG) signal is a significant factor in the cardiovascular system as most of the medical diagnoses can be well
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On Sombor Index Symmetry (IF 2.645) Pub Date : 2021-01-16 Kinkar Chandra Das; Ahmet Sinan Çevik; Ismail Naci Cangul; Yilun Shang
The concept of Sombor index (SO) was recently introduced by Gutman in the chemical graph theory. It is a vertex-degree-based topological index and is denoted by Sombor index SO: SO=SO(G)=∑vivj∈E(G)dG(vi)2+dG(vj)2, where dG(vi) is the degree of vertex vi in G. Here, we present novel lower and upper bounds on the Sombor index of graphs by using some graph parameters. Moreover, we obtain several relations
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Comparison of Simulations with a Mean-Field Approach vs. Synthetic Correlated Networks Symmetry (IF 2.645) Pub Date : 2021-01-16 Maria Letizia Bertotti; Giovanni Modanese
It is well known that dynamical processes on complex networks are influenced by the degree correlations. A common way to take these into account in a mean-field approach is to consider the function knn(k) (average nearest neighbors degree). We re-examine the standard choices of knn for scale-free networks and a new family of functions which is independent from the simple ansatz knn∝kα but still displays
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Discrete-Time Pole-Region Robust Controller for Magnetic Levitation Plant Symmetry (IF 2.645) Pub Date : 2021-01-16 Mária Hypiusová; Danica Rosinová
Robust pole-placement based on convex DR-regions belongs to the efficient control design techniques for real systems, providing computationally tractable pole-placement design algorithms. The problem arises in the discrete-time domain when the relative damping is prescribed since the corresponding discrete-time domain is non-convex, having a “cardioid” shape. In this paper, we further develop our recent
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Innovative Supplier Selection from Collaboration Perspective with a Hybrid MCDM Model: A Case Study Based on NEVs Manufacturer Symmetry (IF 2.645) Pub Date : 2021-01-16 Guoxin Liu; Shuqin Fan; Yan Tu; Guangjie Wang
In the context of Chinese innovation-driven strategy, the role of suppliers has been attracting much attention. Since not every supplier can contribute to the buyer’s innovation, scientifically selecting an innovative supplier is highly valued by decision-makers from the new energy vehicle (NEV) manufacturers. This paper focuses on proposing a novel decision framework in the context of collaborative
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Isospin Symmetry Breaking Effects on the Mass-Radius Relation of a Neutron Star Symmetry (IF 2.645) Pub Date : 2021-01-16 Giovanni Selva; Xavier Roca-Maza; Gianluca Colò
Isospin symmetry breaking effects on the mass-radius relation of a cold, non-accreting neutron star are studied on the basis of two Skyrme Energy Density Functionals (EDFs). One functional contains isospin symmetry breaking terms other than those typically included in Skyrme EDFs while its counterpart is of standard form. Both functionals are based on the same fitting protocol except for the observables
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Finite Pure Plane Strain Bending of Inhomogeneous Anisotropic Sheets Symmetry (IF 2.645) Pub Date : 2021-01-16 Sergei Alexandrov; Elena Lyamina; Yeong-Maw Hwang
The present paper concerns the general solution for finite plane strain pure bending of incompressible, orthotropic sheets. In contrast to available solutions, the new solution is valid for inhomogeneous distributions of plastic properties. The solution is semi-analytic. A numerical treatment is only necessary for solving transcendent equations and evaluating ordinary integrals. The solution’s starting
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The Bias toward the Right Side of others Is Stronger for Hands Than for Feet Symmetry (IF 2.645) Pub Date : 2021-01-17 Chiara Lucafò; Daniele Marzoli; Przemysław Zdybek; Gianluca Malatesta; Federico Smerilli; Cosimo Ferrara; Luca Tommasi
As shown by a series of previous studies, ambiguous human bodies performing unimanual or unipedal actions tend to be perceived more frequently as right-handed or right-footed rather than left-handed or left-footed, which indicates a perceptual and attentional bias toward the right side of others’ body. However, none of such studies assessed whether the relative strength of such a bias differs between
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Deep Learning for Spectrum Sensing in Cognitive Radio Symmetry (IF 2.645) Pub Date : 2021-01-17 Surendra Solanki; Vasudev Dehalwar; Jaytrilok Choudhary
The detection of primary user signals is essential for optimum utilization of a spectrum by secondary users in cognitive radio (CR). The conventional spectrum sensing schemes have the problem of missed detection/false alarm, which hampers the proper utilization of spectrum. Spectrum sensing through deep learning minimizes the margin of error in the detection of the free spectrum. This research provides
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Iterated Darboux Transformation for Isothermic Surfaces in Terms of Clifford Numbers Symmetry (IF 2.645) Pub Date : 2021-01-17 Jan L. Cieśliński; Zbigniew Hasiewicz
Isothermic surfaces are defined as immersions with the curvture lines admitting conformal parameterization. We present and discuss the reconstruction of the iterated Darboux transformation using Clifford numbers instead of matrices. In particulalr, we derive a symmetric formula for the two-fold Darboux transformation, explicitly showing Bianchi’s permutability theorem. In algebraic calculations an
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On the Recurrence Properties of Narayana’s Cows Sequence Symmetry (IF 2.645) Pub Date : 2021-01-17 Xin Lin
In this paper, we consider the recurrence properties of two generalized forms of Narayana’s cows sequence. On the one hand, we study Narayana’s cows sequence at negative indices and express it as the linear combination of the sequence at positive indices. On the other hand, we study the convolved Narayana number and obtain a computation formula for it.
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Spontaneous and Stimulated Undulator Radiation in Symmetric and Asymmetric Multi-Periodic Magnetic Fields Symmetry (IF 2.645) Pub Date : 2021-01-15 Konstantin Zhukovsky; Igor Fedorov
In this work, the radiation from electrons in multi-periodic undulator fields with symmetric and asymmetric harmonics was analyzed using generalized Bessel functions formalism. The asymmetric, symmetric, and anti-symmetric periodic magnetic fields with harmonics were studied in order to get the enhanced radiation of the high harmonics of undulator radiation (UR). The effect on the spontaneous and stimulated
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Elite Exploitation: A Combination of Mathematical Concept and EMO Approach for Multi-Objective Decision Making Symmetry (IF 2.645) Pub Date : 2021-01-15 Wenxiao Li; Yushui Geng; Jing Zhao; Kang Zhang; Jianxin Liu
This paper explores the combination of a classic mathematical function named “hyperbolic tangent” with a metaheuristic algorithm, and proposes a novel hybrid genetic algorithm called NSGA-II-BnF for multi-objective decision making. Recently, many metaheuristic evolutionary algorithms have been proposed for tackling multi-objective optimization problems (MOPs). These algorithms demonstrate excellent
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Novel Joint Object Detection Algorithm Using Cascading Parallel Detectors Symmetry (IF 2.645) Pub Date : 2021-01-15 Zihan Zhou; Qinghan Lai; Shuai Ding; Song Liu
Object detection is an essential computer vision task that aims to detect target objects from an image. The traditional models are insufficient to generate a high-quality anchor box. To solve the problem, we propose a novel joint model called guided anchoring Region proposal networks and Cascading Grid Region Convolutional Neural Networks (RCGrid R-CNN), enhancing the ability of object detection. Our
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Automatic Segmentation and Measurement of Infantile Hemangioma Symmetry (IF 2.645) Pub Date : 2021-01-15 Serban Oprisescu; Mihai Ciuc; Alina Sultana
Infantile hemangiomas (IHs) are a type of vascular tumors that affect around 10% of newborns. The measurement of the lesion size and the assessment of the evolution is done manually by the physician. This paper presents an algorithm for the automatic computation of the IH lesion surface. The image scale is computed by using the Hough transform and the total variation. As pre-processing, a geometric
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Behavior of the Eigenvalues and Eignfunctions of the Regge-Type Problem Symmetry (IF 2.645) Pub Date : 2021-01-15 Karwan H. F. Jwamer; Rando R. Q. Rasul
This article investigates the spectral theory of the problem of the Regge-type with transmission conditions and discontinuous coefficients. We formulate a new linear operator, by which we can deal with simplicity and boundedness of the eigenpairs of the problem. The aim of this work is to conduct that the problem has an infinite number of simple positive eigenvalues.
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Zebrafish Melanophores Suggest Novel Functions of Cell Chirality in Tissue Formation Symmetry (IF 2.645) Pub Date : 2021-01-13 Hiroaki Yamanaka; Shigeru Kondo
Several types of cells show left–right asymmetric behavior, unidirectional rotation, or spiral movements. For example, neutrophil-like differentiated HL60 (dHL60) cells show leftward bias in response to chemoattractant. Neurons extend neurites, creating a clockwise spiral. Platelet cells shows unidirectional spiral arrangements of actin fibers. In the microfabricated culture environment, groups of
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Properties of Quantizer and Dequantizer Operators for Qudit States and Parametric Down-Conversion Symmetry (IF 2.645) Pub Date : 2021-01-14 Peter Adam; Vladimir A. Andreev; Margarita A. Man’ko; Vladimir I. Man’ko; Matyas Mechler
We review the method of quantizers and dequantizers to construct an invertible map of the density operators onto functions including probability distributions and discuss in detail examples of qubit and qutrit states. The biphoton states existing in the process of parametric down-conversion are studied in the probability representation of quantum mechanics.
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Application of Game Theory against Nature in Supporting Bid Pricing in Construction Symmetry (IF 2.645) Pub Date : 2021-01-14 Łukasz Rzepecki; Piotr Jaśkowski
The problem of setting prices for construction works is significant for both the investor and contractor companies. The periodically occurring instabilities in the economy require investment process participants to perform detailed market analyses and assessments, as well as to monitor price forecasts in construction. It is only after such an assessment that it is possible within the framework of the
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Design and Optimization of a Fuzzy Logic System for Academic Performance Prediction Symmetry (IF 2.645) Pub Date : 2021-01-14 Juan A. Rojas; Helbert E. Espitia; Lilian A. Bejarano
Currently, in Colombia, different problems in education exist; one of them is the inconvenience in tracing and controlling the learning trajectories that decide the topics taught in the country’s educational institutions. This work aims to implement a logic-based system that allows teachers and educational institutions to carry out a continuous monitoring process of students’ academic performance,
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The Exact Theory of the Stern–Gerlach Experiment and Why It Does Not Imply That a Fermion Can Only Have Its Spin Up or Down Symmetry (IF 2.645) Pub Date : 2021-01-14 Gerrit Coddens
The Stern–Gerlach experiment is notoriously counter-intuitive. The official theory is that the spin of a fermion remains always aligned with the magnetic field. Its directions are thus quantized: It can only be spin-up or spin-down. However, that theory is based on mathematical errors in the way it (mis)treats spinors and group theory. We present here a mathematically rigorous theory for a fermion
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Analysis of Fractal Structures in Dehydrated Films of Protein Solutions Symmetry (IF 2.645) Pub Date : 2021-01-13 Maksim Baranov; Elena Velichko; Konstantin Greshnevikov
The article deals with dendritic structures resulting from self-organization processes in aqueous solutions of albumin proteins. The methods for obtaining the structures and experimental results are presented. It is shown that dendrites are fractal structures that are symmetric under certain conditions of their formation and can have different characteristics depending on the isothermal dehydration
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Hadron–Quark Phase Transition in the SU (3) Local Nambu–Jona-Lasinio (NJL) Model with Vector Interaction Symmetry (IF 2.645) Pub Date : 2021-01-13 Grigor Alaverdyan
We study the hadron–quark hybrid equation of state (EOS) of compact-star matter. The Nambu–Jona-Lasinio (NJL) local SU (3) model with vector-type interaction is used to describe the quark matter phase, while the relativistic mean field (RMF) theory with the scalar-isovector δ-meson effective field is adopted to describe the hadronic matter phase. It is shown that the larger the vector coupling constant
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An Efficient Login Authentication System against Multiple Attacks in Mobile Devices Symmetry (IF 2.645) Pub Date : 2021-01-13 Yang Li; Xinyu Yun; Liming Fang; Chunpeng Ge
Access management of IoT devices is extremely important, and a secure login authentication scheme can effectively protect users’ privacy. However, traditional authentication schemes are threatened by shoulder-surfing attacks, and biometric-based schemes, such as fingerprint recognition and face recognition, that are commonly used today can also be cracked. Researchers have proposed some schemes for
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Influence of Mach Number of Main Flow on Film Cooling Characteristics under Supersonic Condition Symmetry (IF 2.645) Pub Date : 2021-01-13 Bo Zhang; Yuan-Xiang Chen; Zhi-guo Wang; Ji-Quan Li; Hong-hu Ji
The flow and heat transfer characteristics of a film jet inclined to different supersonic situations with a varying Mach number of the main flow were numerically investigated. In supersonic situations, complicated waves are generated by the obstacle of the film jet. In this work, extra pressure is exerted onto the film jet, causing better film attachment to the wall. The strengthening of attachment
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Unpaired Image Denoising via Wasserstein GAN in Low-Dose CT Image with Multi-Perceptual Loss and Fidelity Loss Symmetry (IF 2.645) Pub Date : 2021-01-13 Zhixian Yin; Kewen Xia; Ziping He; Jiangnan Zhang; Sijie Wang; Baokai Zu
The use of low-dose computed tomography (LDCT) in medical practice can effectively reduce the radiation risk of patients, but it may increase noise and artefacts, which can compromise diagnostic information. The methods based on deep learning can effectively improve image quality, but most of them use a training set of aligned image pairs, which are difficult to obtain in practice. In order to solve
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Research Review on Parking Space Detection Method Symmetry (IF 2.645) Pub Date : 2021-01-13 Yong Ma; Yangguo Liu; Lin Zhang; Yuanlong Cao; Shihui Guo; Hanxi Li
The parking assist system is an essential application of the car’s active collision avoidance system in low-speed and complex urban environments, which has been a hot research topic in recent years. Parking space detection is an important step of the parking assistance system, and its research object is parking spaces with symmetrical structures in parking lots. By analyzing and investigating parking
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Implementing a Symmetric Lightweight Cryptosystem in Highly Constrained IoT Devices by Using a Chaotic S-Box Symmetry (IF 2.645) Pub Date : 2021-01-13 Badr M. Alshammari; Ramzi Guesmi; Tawfik Guesmi; Haitham Alsaif; Ahmed Alzamil
In the Internet of Things (IoT), a lot of constrained devices are interconnected. The data collected from those devices can be the target of cyberattacks. In this paper, a lightweight cryptosystem that can be efficiently implemented in highly constrained IOT devices is proposed. The algorithm is mainly based on Advanced Encryption Standard (AES) and a new chaotic S-box. Since its adoption by the IEEE
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Transverse–Spin Quark Distributions from Asymmetry Data and Symmetry Arguments Symmetry (IF 2.645) Pub Date : 2021-01-12 Vincenzo Barone; Franco Bradamante; Anna Martin
The transversity and the Sivers distribution functions of quarks incorporate important information about the transverse-spin and transverse-momentum structure of nucleons. We show how these distributions can be directly determined point by point from leptoproduction asymmetry data collected for various targets and produced hadrons by the COMPASS Collaboration. Only simple symmetry relations are used
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On the Arcsecant Hyperbolic Normal Distribution. Properties, Quantile Regression Modeling and Applications Symmetry (IF 2.645) Pub Date : 2021-01-12 Mustafa Ç. Korkmaz; Christophe Chesneau; Zehra Sedef Korkmaz
This work proposes a new distribution defined on the unit interval. It is obtained by a novel transformation of a normal random variable involving the hyperbolic secant function and its inverse. The use of such a function in distribution theory has not received much attention in the literature, and may be of interest for theoretical and practical purposes. Basic statistical properties of the newly
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A Type of Time-Symmetric Stochastic System and Related Games Symmetry (IF 2.645) Pub Date : 2021-01-12 Qingfeng Zhu; Yufeng Shi; Jiaqiang Wen; Hui Zhang
This paper is concerned with a type of time-symmetric stochastic system, namely the so-called forward–backward doubly stochastic differential equations (FBDSDEs), in which the forward equations are delayed doubly stochastic differential equations (SDEs) and the backward equations are anticipated backward doubly SDEs. Under some monotonicity assumptions, the existence and uniqueness of measurable solutions
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Picture Fuzzy Geometric Aggregation Operators Based on a Trapezoidal Fuzzy Number and Its Application Symmetry (IF 2.645) Pub Date : 2021-01-12 Minxia Luo; Huifeng Long
The picture fuzzy set is a generation of an intuitionistic fuzzy set. The aggregation operators are important tools in the process of information aggregation. Some aggregation operators for picture fuzzy sets have been proposed in previous papers, but some of them are defective for picture fuzzy multi-attribute decision making. In this paper, we introduce a transformation method for a picture fuzzy
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