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On Darbo- and Sadovskii-Type Fixed Point Theorems in Banach Spaces Symmetry (IF 2.94) Pub Date : 2024-03-27 Leszek Olszowy, Tomasz Zając
The paper aims to generalize several known Darbo- and Sadovskii-type fixed point theorems. These generalizations weaken the assumptions used so far. In addition, an example of an application is presented.
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New Insights into Aromaticity through Novel Delta Polynomials and Delta Aromatic Indices Symmetry (IF 2.94) Pub Date : 2024-03-27 Krishnan Balasubramanian
We have developed novel polynomials called delta polynomials, which are, in turn, derived from the characteristic and matching polynomials of graphs associated with polycyclic aromatic compounds. Natural logarithmic aromatic indices are derived from these delta polynomials, which are shown to provide new insights into the aromaticity of polycyclic aromatic compounds, including the highly symmetric
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Retarded Gravity in Disk Galaxies Symmetry (IF 2.94) Pub Date : 2024-03-26 Yuval Glass, Tomer Zimmerman, Asher Yahalom
Disk galaxies have a typical dimension of a few tens of kiloparsecs. It follows from the theory of general relativity that any signal originating from the galactic center will be noticed at the outskirts of the galaxy only tens of thousands of years later. This retardation effect, however, is absent in modelling used to calculate rotation curves throughout entire galaxies and their external gas. The
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A Symmetric Kernel Smoothing Estimation of the Time-Varying Coefficient for Medical Costs Symmetry (IF 2.94) Pub Date : 2024-03-26 Simeng Li, Dianliang Deng, Yuecai Han
In longitudinal studies, subjects are repeatedly observed at a set of distinct time points until the terminal event time. The time-varying coefficient model extends the parametric method and captures the dynamic trajectories of time-dependent covariate effects, thus enabling it to describe the potential relationship between the longitudinal variable and the observed time points. In this study, we propose
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Theoretical Advances in Beta and Double-Beta Decay Symmetry (IF 2.94) Pub Date : 2024-03-26 Vasile-Alin Sevestrean, Sabin Stoica
Weak interaction processes continue to be hot topics in fundamental physics research. In this paper, we briefly review some recent advances in the theoretical study of beta and double-beta decays that include both the nuclear and atomic part of these processes. On the nuclear side, we present a statistical approach for the computation of the nuclear matrix elements (NME) for neutrinoless double-beta
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Load Calculation Method for Deep-Buried Layered Soft Rock Tunnel Based on Back-Analysis of Structural Deformation Symmetry (IF 2.94) Pub Date : 2024-03-23 Lixin Zhang, Lijun Chen, Jianxun Chen, Yanbin Luo, Huijie Guo, Yang Zhai, Pengkun Wang
After the excavation and unloading of deep-buried soft rock tunnels, support structures often experience deformation-related disasters such as concrete cracking, steel frame bending and twisting, and primary support instability under different forms of load. Accurately calculating the load borne by the primary support structure is the key to ensuring design rationality and construction safety. Especially
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Stability Analysis of Milling Based on the Barycentric Rational Interpolation Differential Quadrature Method Symmetry (IF 2.94) Pub Date : 2024-03-24 Yonggang Mei, Bingbing He, Shangwen He, Xin Ren, Zeqi Zhang
Chatter causes great damage to the machining process, and the selection of appropriate process parameters through chatter stability analysis is of great significance for achieving chatter-free machining. This article proposes a milling stability analysis method based on the barycentric rational interpolation differential quadrature method (DQM). The dynamics of the milling process considering the regeneration
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Estimation of Multiresponse Multipredictor Nonparametric Regression Model Using Mixed Estimator Symmetry (IF 2.94) Pub Date : 2024-03-25 Nur Chamidah, Budi Lestari, I Nyoman Budiantara, Dursun Aydin
In data analysis using a nonparametric regression approach, we are often faced with the problem of analyzing a set of data that has mixed patterns, namely, some of the data have a certain pattern and the rest of the data have a different pattern. To handle this kind of datum, we propose the use of a mixed estimator. In this study, we theoretically discuss a developed estimation method for a nonparametric
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Index for Quantifying ‘Order’ in Three-Dimensional Shapes Symmetry (IF 2.94) Pub Date : 2024-03-22 Takahiro Shimizu, Masaya Okamoto, Yuto Ieda, Takeo Kato
In this study, we focused on assessing the symmetry of shapes and quantifying an index of ‘order’ in three-dimensional shapes using curvature, which is important in product design. Specifically, the target three-dimensional shape was divided into two segments, and the Jensen–Shannon distance was calculated for the distribution of the Casorati curvatures in both segments to determine the similarity
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An Exploration of Multitasking Scheduling Considering Interruptible Job Assignments, Machine Aging Effects, the Influence of Deteriorating Maintenance, and Symmetry Symmetry (IF 2.94) Pub Date : 2024-03-21 Li Zeng
The unique topic of allocating and scheduling tasks on a single machine in a multitasking environment is the main emphasis of this research, which also takes into account the effects of worsening maintenance and job-dependent aging effects. In this scenario, the performance and efficiency of the machine in handling different tasks should be symmetric, without significant bias due to the nature or size
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Syntheses of Azulene Embedded Polycyclic Compounds Symmetry (IF 2.94) Pub Date : 2024-03-22 Alexandru C. Razus
This review focuses on obtaining embedded azulene polycyclic molecules treated according to their particular structure. The division of material into the azulene unit grafted only on one or two bonds and poly-fused azulene compounds was suggested with the intention of facilitating the presentation and assimilation of information. The similarity of some structural features in the compounds included
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An Equivalent-Perceptional Intertemporal Choice Heuristics Model for Electric Operation Vehicle Charging Behavior Symmetry (IF 2.94) Pub Date : 2024-03-20 Yue Han, Yi Quan, Peiwen Li, Bo Fu, Mei Xie, Haiyan Zhao
The inherent stochasticity of electric operation vehicle (EOV) charging poses challenges to the stability and efficiency of regional power distribution networks. Existing charging behavior decision-making models often prioritize revenue considerations, neglecting the influence of multi-time-span characteristics and the potential irrationality of EOV owners. To address these limitations, this study
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Local Muscle Oxygenation Differences between Lower Limbs according to Muscle Mass in Breath-Hold Divers Symmetry (IF 2.94) Pub Date : 2024-03-21 Ognjen Uljević, Dario Vrdoljak, Ivan Drviš, Nikola Foretić, Željko Dujić
Oxidative potential and anaerobic capacity could be influential to the training regimen and performance of breath-hold diving (BHD) athletes. Therefore, this study aimed to determine the differences in local muscle oxygenation between the lower limbs according to the muscle mass percentage in spearfishermen and freedivers. The sample of participants included 21 BHD athletes (13 freedivers; 8 spearfishermen;
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A Novel Money Laundering Prediction Model Based on a Dynamic Graph Convolutional Neural Network and Long Short-Term Memory Symmetry (IF 2.94) Pub Date : 2024-03-21 Fei Wan, Ping Li
Money laundering is an illicit activity that seeks to conceal the nature and origins of criminal proceeds, posing a substantial threat to the national economy, the political order, and social stability. To scientifically and reasonably predict money laundering risks, this paper focuses on the “layering” stage of the money laundering process in the field of supervised learning for money laundering fraud
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A Symmetric Non-Stationary Loop Subdivision with Applications in Initial Point Interpolation Symmetry (IF 2.94) Pub Date : 2024-03-21 Baoxing Zhang, Yunkun Zhang, Hongchan Zheng
Loop subdivision is a significant surface scheme with wide applications in fields like computer graphics and wavelet. As a type of stationary scheme, Loop subdivision cannot adjust the limit surface directly. In this paper, we present a new way to solve this problem by proposing a symmetric non-stationary Loop subdivision based on a suitable iteration. This new scheme can be used to adjust the limit
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Statistical Inference and Application of Asymmetrical Generalized Pareto Distribution Based on Peaks-Over-Threshold Model Symmetry (IF 2.94) Pub Date : 2024-03-18 Wenru Chen, Xu Zhao, Mi Zhou, Haiqing Chen, Qingqing Ji, Weihu Cheng
Generalized Pareto distribution (GPD), an asymmetrical distribution, primarily models exceedances over a high threshold in many applications. Within the peaks-over-threshold (POT) framework, we consider a new GPD parameter estimation method to estimate a common tail risk measure, the value at risk (VaR). The proposed method is more suitable for the POT framework and makes full use of data information
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An ONIOM-Based High-Level Thermochemistry Study on Hydrogen Abstraction Reactions of Large Straight-Chain Alkanes by Hydrogen, Hydroxyl, and Hydroperoxyl Radicals Symmetry (IF 2.94) Pub Date : 2024-03-18 Yicheng Chi, Hao Pan, Qinghui Meng, Lidong Zhang, Peng Zhang
Accurate thermochemical data are of great importance in developing quantitatively predictive reaction mechanisms for transportation fuels, such as diesel and jet fuels, which are primarily composed of large hydrocarbon molecules, especially large straight-chain alkanes containing more than 10 carbon atoms. This paper presents an ONIOM[QCISD(T)/CBS:DFT]-based theoretical thermochemistry study on the
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Coverings of Graphoids: Existence Theorem and Decomposition Theorems Symmetry (IF 2.94) Pub Date : 2024-03-20 Aleksander Malnič, Boris Zgrablić
A graphoid is a mixed multigraph with multiple directed and/or undirected edges, loops, and semiedges. A covering projection of graphoids is an onto mapping between two graphoids such that at each vertex, the mapping restricts to a local bijection on incoming edges and outgoing edges. Naturally, as it appears, this definition displays unusual behaviour since the projection of the corresponding underlying
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Mathematical Modeling of Robotic Locomotion Systems Symmetry (IF 2.94) Pub Date : 2024-03-20 Erik Prada, Ľubica Miková, Ivan Virgala, Michal Kelemen, Peter Ján Sinčák, Roman Mykhailyshyn
This article deals with the presentation of an alternative approach that uses methods of geometric mechanics, which allow one to see into the geometrical structure of the equations and can be useful not only for modeling but also during the design of symmetrical locomotion systems and their control and motion planning. These methods are based on extracting the symmetries of Lie groups from the locomotion
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Control and Analysis of a Hybrid-Rotor Bearingless Switched Reluctance Motor with One-Phase Full-Period Suspension Symmetry (IF 2.94) Pub Date : 2024-03-18 Zeyuan Liu, Xingcheng Wu, Wenfeng Zhang, Yan Yang, Chengzi Liu
In the traditional control scheme of a 12/8-pole bearingless switched reluctance motor (BSRM), radial force and torque are usually controlled as a compromise due to the conflict between their effective output areas. Additionally, each phase requires individual power circuits and is excited in turn to produce a continuous levitation force, resulting in high power device requirements and high controller
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Influence of the Plan Structural Symmetry on the Non-Linear Seismic Response of Framed Reinforced Concrete Buildings Symmetry (IF 2.94) Pub Date : 2024-03-19 Juan Carlos Vielma-Quintero, Edgar Giovanny Diaz-Segura, Juan Carlos Vielma
Seismic-resistant design incorporates measures to ensure that structures perform adequately under specific limit states, focusing on seismic forces derived from both the equivalent static and spectral modal methods. This study examined buildings on slopes in densely built urban areas, a common scenario in Latin American cities with high seismic risks. The adjustment of high-rise buildings to sloping
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The Hamilton–Waterloo Problem with C16-Factors and Cm-Factors for Odd m Symmetry (IF 2.94) Pub Date : 2024-03-19 Li Wang
The Hamilton–Waterloo problem is a problem of graph factorization. The Hamilton–Waterloo problem HWP(H;m,n;α,β) asks for a two-factorization of a graph H containing α Cm-factors and β Cn-factors. Let Kv* denote the complete graph Kv if v is odd and Kv minus a one-factor if v is even. In this paper, we completely solve the Hamilton–Waterloo problem HWP(Kv*;m,16;α,β) for odd m≥9 and α≥15.
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On Generalized t-Transformation of Free Convolution Symmetry (IF 2.94) Pub Date : 2024-03-19 Ayed. R. A. Alanzi, Raouf Fakhfakh, Fatimah Alshahrani
A notion of generalized (two-parameterized) t-transformation of free convolution, also called (t=(a,b))-deformed free convolution, is introduced for a∈R and b>0. In this article, some results of t-deformed free convolution are given within the theory of Cauchy-Stieltjes Kernel (CSK) families. The variance function is a fundamental concept in CSK families. An expression is provided for the variance
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On Some Combinatorial Properties of Balancing Split Quaternions Symmetry (IF 2.94) Pub Date : 2024-03-19 Dorota Bród
Quaternions and split quaternions are used in quantum physics, computer science, and in many areas of mathematics. In this paper, we define and study two new classes of split quaternions, namely balancing split quaternions and Lucas-balancing split quaternions. Moreover, well-known properties, e.g., Catalan, d’Ocagne, and Vajda identities, for these quaternions are also presented. We give matrix generators
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Pseudo-Finsler Radially Symmetric Spaces Symmetry (IF 2.94) Pub Date : 2024-03-18 Marianty Ionel, Miguel Ángel Javaloyes
We introduce the concept of radially symmetric pseudo-Finsler spaces, which generalize the notion of symmetric Finsler spaces, and prove that this concept is equivalent to the preservation of flag curvature by parallel transport together with reversibility. As a consequence, reversible pseudo-Finsler manifolds with constant flag curvature are radially symmetric.
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Modified Tseng Method for Solving Pseudomonotone Variational Inequality Problem in Banach Spaces Symmetry (IF 2.94) Pub Date : 2024-03-18 Rose Maluleka, Godwin Chidi Ugwunnadi, Maggie Aphane, Hammed A. Abass, Abdul Rahim Khan
This article examines the process for solving the fixed-point problem of Bregman strongly nonexpansive mapping as well as the variational inequality problem of the pseudomonotone operator. Within the context of p-uniformly convex real Banach spaces that are also uniformly smooth, we introduce a modified Halpern iterative technique combined with an inertial approach and Tseng methods for finding a common
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On the Breaking of the U(1) Peccei–Quinn Symmetry and Its Implications for Neutrino and Dark Matter Physics Symmetry (IF 2.94) Pub Date : 2024-03-18 Osvaldo Civitarese
The Standard Model of electroweak interactions is based on the fundamental SU(2)weak × U(1)elect representation. It assumes massless neutrinos and purely left-handed massive W± and Z0 bosons to which one should add the massless photon. The existence, verified experimentally, of neutrino oscillations poses a challenge to this scheme, since the oscillations take place between at least three massive neutrinos
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An Extensive Investigation into the Use of Machine Learning Tools and Deep Neural Networks for the Recognition of Skin Cancer: Challenges, Future Directions, and a Comprehensive Review Symmetry (IF 2.94) Pub Date : 2024-03-18 Syed Ibrar Hussain, Elena Toscano
Skin cancer poses a serious risk to one’s health and can only be effectively treated with early detection. Early identification is critical since skin cancer has a higher fatality rate, and it expands gradually to different areas of the body. The rapid growth of automated diagnosis frameworks has led to the combination of diverse machine learning, deep learning, and computer vision algorithms for detecting
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Recent Developments in Iterative Algorithms for Digital Metrics Symmetry (IF 2.94) Pub Date : 2024-03-18 Aasma Shaheen, Afshan Batool, Amjad Ali, Hamed Al Sulami, Aftab Hussain
This paper aims to provide a comprehensive analysis of the advancements made in understanding Iterative Fixed-Point Schemes, which builds upon the concept of digital contraction mappings. Additionally, we introduce the notion of an Iterative Fixed-Point Schemes in digital metric spaces. In this study, we extend the idea of Iteration process Mann, Ishikawa, Agarwal, and Thakur based on the ϝ-Stable
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Charged Lepton-Flavour Violation Symmetry (IF 2.94) Pub Date : 2024-03-16 Giulia Frau, Christoph Langenbruch
We review the experimental status of searches for lepton-flavour violation in the charged sector. We give an overview of searches for lepton-flavour violation in purely leptonic decays, hadron decays, and decays of heavy bosons. We focus on the most stringent constraints on lepton-flavour violating processes in these areas and give prospects for ongoing and future experiments.
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The Hermitian Solution to a New System of Commutative Quaternion Matrix Equations Symmetry (IF 2.94) Pub Date : 2024-03-17 Yue Zhang, Qing-Wen Wang, Lv-Ming Xie
This paper considers the Hermitian solutions of a new system of commutative quaternion matrix equations, where we establish both necessary and sufficient conditions for the existence of solutions. Furthermore, we derive an explicit general expression when it is solvable. In addition, we also provide the least squares Hermitian solution in cases where the system of matrix equations is not consistent
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New Approach of Normal and Shear Stress Components for Multiple Curvilinear Holes Which Weakened a Flexible Plate Symmetry (IF 2.94) Pub Date : 2024-03-16 Faizah M. Alharbi, Nafeesa G. Alhendi
In this article, a thin infinite flexible plate weakened by multiple curvilinear holes is considered. The strength shapes are mapped outside a unit circle with the assistance of particular conformal mapping under certain conditions. The mathematical model that governs the rounded forces of the current physical problem is the boundary value problem of elastic media. This study is applicable to many
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An ASCON AOP-SystemC Environment for Security Fault Analysis Symmetry (IF 2.94) Pub Date : 2024-03-14 Hassen Mestiri, Imen Barraj, Mouna Bedoui, Mohsen Machhout
Cryptographic devices’ complexity necessitates fast security simulation environments against fault attacks. SystemC, a promising candidate in Electronic System Levels (ESLs), can achieve higher simulation speeds while maintaining accuracy and reliability, and its modular and hierarchical design allows for efficient modeling of complex cryptographic algorithms and protocols. However, code modification
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Hidden-Charm Pentaquarks with Strangeness in a Chiral Quark Model Symmetry (IF 2.94) Pub Date : 2024-03-14 Gang Yang, Jialun Ping, Jorge Segovia
The LHCb collaboration has recently announced the discovery of two hidden-charm pentaquark states with strange quark content, Pcs(4338) and Pcs(4459); its analysis points towards having both hadrons’ isospins equal to zero and spin-parity quantum numbers 12− and 32−, respectively. Herein, we perform a systematical investigation of the qqscc¯(q=u,d) system by means of a chiral quark model, along with
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Enigma of Pyramidal Neurons: Chirality-Centric View on Biological Evolution. Congruence to Molecular, Cellular, Physiological, Cognitive, and Psychological Functions Symmetry (IF 2.94) Pub Date : 2024-03-15 Victor Vasilyevich Dyakin, Nika Viktorovna Dyakina-Fagnano
The mechanism of brain information processing unfolds within spatial and temporal domains inherently linked to the concept of space–time symmetry. Biological evolution, beginning with the prevalent molecular chirality, results in the handedness of human cognitive and psychological functions (the phenomena known as biochirality). The key element in the chain of chirality transfer from the downstream
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A Low-Latency Noise-Aware Tone Mapping Operator for Hardware Implementation with a Locally Weighted Guided Filter Symmetry (IF 2.94) Pub Date : 2024-03-15 Qianwang Liang, Tianyu Yan, Nan Wang, Zhiying Zhu, Jiongyao Ye
A tone mapping operator (TMO) is a module in the image signal processing pipeline that is used to convert high dynamic range images to low dynamic range images for display. Currently, state-of-the-art TMOs typically take complex algorithms and are implemented on graphics processing units, making it difficult to run with low latency on edge devices, and TMOs implemented in hardware circuits often lack
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Special Relativity in Terms of Hyperbolic Functions with Coupled Parameters in 3+1 Dimensions Symmetry (IF 2.94) Pub Date : 2024-03-15 Nikolai S. Akintsov, Artem P. Nevecheria, Gennadii F. Kopytov, Yongjie Yang, Tun Cao
This paper presents a method for parameterizing new Lorentz spacetime coordinates based on coupled parameters. The role of symmetry in rapidity in special relativity is explored, and invariance is obtained for new spacetime intervals with respect to the Lorentz transformation. Using the Euler–Hamilton equations, an additional angular rapidity and perpendicular rapidity are obtained, and the Hamiltonian
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Improved Generative Adversarial Network for Bearing Fault Diagnosis with a Small Number of Data and Unbalanced Data Symmetry (IF 2.94) Pub Date : 2024-03-15 Zhaohui Qin, Faguo Huang, Jiafang Pan, Junlin Niu, Haihua Qin
Fault data under real operating conditions are often difficult to collect, making the number of trained fault data small and out of proportion to normal data. Thus, fault diagnosis symmetry (balance) is compromised. This will result in less effective fault diagnosis methods for cases with a small number of data and data imbalances (S&I). We present an innovative solution to overcome this problem, which
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The Post-Quasi-Static Approximation: An Analytical Approach to Gravitational Collapse Symmetry (IF 2.94) Pub Date : 2024-03-12 Luis Herrera, Alicia Di Prisco, Justo Ospino
A seminumerical approach proposed many years ago for describing gravitational collapse in the post-quasi-static approximation is modified in order to avoid the numerical integration of the basic differential equations the approach is based upon. For doing that we have to impose some restrictions on the fluid distribution. More specifically, we shall assume the vanishing complexity factor condition
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Explanatory Model for Elite Canoeists’ Performance Using a Functional Electromechanical Dynamometer Based on Detected Lateral Asymmetry Symmetry (IF 2.94) Pub Date : 2024-03-14 Tania Álvarez-Yates, Mario Iglesias-Caamaño, Alba Cuba-Dorado, Virginia Serrano-Gómez, Victor Ferreira-Lima, Fábio Yuzo Nakamura, Oscar García-García
Canoe modality in flatwater canoeing has a clear asymmetrical nature. This study aimed (1) to determine the magnitude and direction of neuromuscular properties, range of motion (ROM) and lower-limb strength asymmetries in female and male canoeists; (2) to establish sex-individualized asymmetry thresholds for canoeists’ neuromuscular properties, ROM and lower-limb strength; and (3) to determine the
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On Variance and Average Moduli of Zeros and Critical Points of Polynomials Symmetry (IF 2.94) Pub Date : 2024-03-14 Sajad A. Sheikh, Mohammad Ibrahim Mir, Osama Abdulaziz Alamri, Javid Gani Dar
This paper investigates various aspects of the distribution of roots and critical points of a complex polynomial, including their variance and the relationships between their moduli using an inequality due to de Bruijn. Making use of two other inequalities-again due to de Bruijn-we derive two probabilistic results concerning upper bounds for the average moduli of the imaginary parts of zeros and those
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Fringe Projection Profilometry for Three-Dimensional Measurement of Aerospace Blades Symmetry (IF 2.94) Pub Date : 2024-03-14 Ze Chen, Mulun Zhu, Chuanzhi Sun, Yongmeng Liu, Jiubin Tan
The aero-engine serves as the “heart” of an aircraft and is a primary factor determining the aircraft’s performance. Among the crucial components in the core of aero-engines, aero-engine compressor blades stand out as extremely important. They are not only numerous but also characterized by a multitude of parameters, making them the most complex parts in an aero-engine. This paper aims to address the
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Analytic Functions in a Complete Reinhardt Domain Having Bounded L-Index in Joint Variables Symmetry (IF 2.94) Pub Date : 2024-03-14 Andriy Bandura, Tetyana Salo, Oleh Skaskiv
The manuscript is an initiative to construct a full and exhaustive theory of analytical multivariate functions in any complete Reinhardt domain by introducing the concept of L-index in joint variables for these functions for a given continuous, non-negative, non-vanishing, vector-valued mapping L defined in an interior of the domain with some behavior restrictions. The complete Reinhardt domain is
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Adaptive Feedback Control of Nonminimum Phase Boost Converter with Constant Power Load Symmetry (IF 2.94) Pub Date : 2024-03-14 Khalil Jouili, Monia Charfeddine, Mohammed Alqarni
The inherent negative impedance characteristics of a Constant Power Load (CPL) pose a potential threat to the stability of the bus voltage in a DC microgrid consisting of a symmetrical parallel boost converter. We suggest an adaptive feedback control technique using the input–output exact feedback linearization theory for a boost converter integrated into a DC microgrid to improve the stability of
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Anisotropy and Asymptotic Degeneracy of the Physical-Hilbert-Space Inner-Product Metrics in an Exactly Solvable Unitary Quantum Model Symmetry (IF 2.94) Pub Date : 2024-03-14 Miloslav Znojil
A unitary-evolution process leading to an ultimate collapse and to a complete loss of observability aliasquantum phase transition is studied. A specific solvable N−state model is considered, characterized by a non-stationary non-Hermitian Hamiltonian. Our analysis uses quantum mechanics formulated in Schrödinger picture in which, in principle, only the knowledge of a complete set of observables (i
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Partial Control and Beyond: Controlling Chaotic Transients with the Safety Function Symmetry (IF 2.94) Pub Date : 2024-03-11 Rubén Capeáns, Miguel A. F. Sanjuan
Chaotic dynamical systems often exhibit transient chaos, where trajectories behave chaotically for a short amount of time before escaping to an external attractor. Sustaining transient chaotic dynamics under disturbances is challenging yet desirable for many applications. The partial control approach exploits the inherent symmetry and geometric structure of chaotic saddles, the topological object responsible
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Mechanical Behavior of Secondary Lining in Super Large-Span Tunnels Considering Temperature Effects Symmetry (IF 2.94) Pub Date : 2024-03-12 Fangfang Dong, Yanbin Luo, Jianxun Chen, Chuanwu Wang, Yahui Liu, Wenjie Xun
Temperature stress has a significant impact on the structural stress of (super) large-span tunnel lining, which can easily lead to structural fatigue damage and premature cracking. With the increasing scale and quantity of super large-span tunnels, the issue of temperature stress in secondary lining has attracted widespread attention. Previous studies have paid little attention to the influence of
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On Solving the Set Orienteering Problem Symmetry (IF 2.94) Pub Date : 2024-03-12 Roberto Montemanni, Derek H. Smith
In the Set Orienteering Problem, a single vehicle, leaving from and returning to a depot, has to serve some customers, each one associated with a given spacial location. Customers are grouped in clusters and a given prize is collected once a customer in a cluster is visited. The prize associated with a cluster can be collected at most once. Travel times among locations are provided, together with a
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Stereoselective Syntheses of Organophosphorus Compounds Symmetry (IF 2.94) Pub Date : 2024-03-12 Oleg I. Kolodiazhnyi, Anastasy O. Kolodiazhna
The review is devoted to the theoretical and synthetic aspects of the stereochemistry of organophosphorus compounds. Organophosphorus compounds are not only widely exist in biologically active pharmaceuticals and agrochemicals, but also have widespread applications in material science and organic synthesis as ligands for transition metal complexes. One of the mainstreams for the development in this
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General Relativistic Stability and Gravitational Wave Content of Rotating Triaxial Neutron Stars Symmetry (IF 2.94) Pub Date : 2024-03-13 Yufeng Luo, Antonios Tsokaros, Roland Haas, Kōji Uryū
Triaxial neutron stars can be sources of continuous gravitational radiation detectable by ground-based interferometers. The amplitude of the emitted gravitational wave can be greatly affected by the state of the hydrodynamical fluid flow inside the neutron star. In this work, we examine the most triaxial models along two sequences of constant rest mass, confirming their dynamical stability. We also
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A Lagrangian Analysis of Tip Leakage Vortex in a Low-Speed Axial Compressor Rotor Symmetry (IF 2.94) Pub Date : 2024-03-13 Jiexuan Hou, Yangwei Liu, Yumeng Tang
A Lagrangian method is introduced to analyze the tip leakage vortex (TLV) behavior in a low-speed axial compressor rotor. The finite-time Lyapunov exponent (FTLE) fields are calculated based on the delayed detached-eddy simulation (DDES) results and identifying the FTLE ridges as Lagrangian coherent structures (LCSs). The computational method of the FTLE field in three-dimensional unsteady flow fields
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Theoretical Modeling and Experimental Verification of Elliptical Hyperbolic Hybrid Flexure Hinges Symmetry (IF 2.94) Pub Date : 2024-03-13 Yan Wang, Lizhong Zhang, Lixin Meng, Hongjie Lu, Yongheng Ma
A flexure hinge composed of elliptical and hyperbolic hybrid configurations is developed and analyzed in this paper. The analytical models of compliance, rotation accuracy, and maximum stress of the flexure hinge are established, and the correctness of the models is validated by finite element analysis and experiments. The influence of structural parameters on compliance and rotation accuracy is discussed
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Analysis of Asymmetric Wear of Brake Pads on Freight Wagons despite Full Contact between Pad Surface and Wheel Symmetry (IF 2.94) Pub Date : 2024-03-13 Sergii Panchenko, Juraj Gerlici, Alyona Lovska, Vasyl Ravlyuk, Ján Dižo, Miroslav Blatnický
This article presents the results of a study focused on identifying the main causes of the asymmetric (clinodual) wear of composite brake pads on freight wagons. A new scientific approach to determining the clinodual wear of composite brake pads on freight wagons is proposed. It is established that the harmful abrasion of the pad occurs during the movement of the freight train due to an imperfection
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Applications of the Symmetrical Structures of Cassini Ovals Symmetry (IF 2.94) Pub Date : 2024-03-10 Peter Grabusts, Oleg Uzhga-Rebrov
One of the geometric figures that has symmetry properties is the Cassini oval. The Cassini oval is a curve defined as the locus of points in the plane such that the product of the distances to two fixed points is constant. Cassini ovals are named after the astronomer Giovanni Domenico Cassini, who studied them in 1680. Today, the geometric properties of Cassini ovals are used in many fields: analytical
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Optimal Choice of the Auxiliary Equation for Finding Symmetric Solutions of Reaction–Diffusion Equations Symmetry (IF 2.94) Pub Date : 2024-03-11 Carmen Ionescu, Radu Constantinescu
This paper addresses an important method for finding traveling wave solutions of nonlinear partial differential equations, solutions that correspond to a specific symmetry reduction of the equations. The method is known as the simplest equation method and it is usually applied with two a priori choices: a power series in which solutions are sought and a predefined auxiliary equation. Uninspired choices
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A 3C Authentication: A Cross-Domain, Certificateless, and Consortium-Blockchain-Based Authentication Method for Vehicle-to-Grid Networks in a Smart Grid Symmetry (IF 2.94) Pub Date : 2024-03-11 Qianhao Miao, Tianyu Ren, Jiahan Dong, Yanjiao Chen, Wenyuan Xu
As an important component of the smart grid, vehicle-to-grid (V2G) networks can deliver diverse auxiliary services and enhance the overall resilience of electrical power systems. However, V2G networks face two main challenges due to a large number of devices that connect to it. First, V2G networks suffer from serious security threats, such as doubtful authenticity and privacy leakage. Second, the efficiency
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Some Properties of a Falling Function and Related Inequalities on Green’s Functions Symmetry (IF 2.94) Pub Date : 2024-03-11 Pshtiwan Othman Mohammed, Ravi P. Agarwal, Majeed A. Yousif, Eman Al-Sarairah, Sarkhel Akbar Mahmood, Nejmeddine Chorfi
Asymmetry plays a significant role in the transmission dynamics in novel discrete fractional calculus. Few studies have mathematically modeled such asymmetry properties, and none have developed discrete models that incorporate different symmetry developmental stages. This paper introduces a Taylor monomial falling function and presents some properties of this function in a delta fractional model with
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Performance Analysis of ARIS-NOMA Systems under Cascade Rician Channels Symmetry (IF 2.94) Pub Date : 2024-03-07 Xuliang Liu, Xinwei Yue, Zhiping Lu, Tianwei Hou
Active reconfigurable intelligent surface (ARIS) has sparked more attention due to its capability to overcome the impact of double fading. This paper introduces using an ARIS to aid non-orthogonal multiple access (NOMA) communications over cascade Rician fading channels, where the direct links between the base station and users are seriously blocked. By applying ARIS, it can amplify the superposed
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Growth of a Sub-Centimeter-Sized CsPbBr3 Bulk Single Crystal Using an Anti-Solvent Precipitation Method Symmetry (IF 2.94) Pub Date : 2024-03-09 Longxing Su
A facile and low-cost strategy to fabricate CsPbBr3 single crystals is essential for developing perovskite optoelectronic devices. Herein, we have presented a room temperature anti-solvent precipitate method for growing sub-centimeter-sized CsPbBr3 single crystals. The as-prepared CsPbBr3 single crystal has an orthorhombic structure, and phase transition occurs as the measured temperature increases
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Implicit and Explicit Preferences for Golden Ratio Symmetry (IF 2.94) Pub Date : 2024-03-09 Claudia Salera, Camilla Vallebella, Marco Iosa, Anna Pecchinenda
The golden ratio, also known as Phi (ϕ ≈ 1.618034), attracted the interest of mathematicians, artists, and intellectuals for many centuries, probably from when it was discovered in human anthropometry. Even in recent times, researchers found the presence of the golden ratio in Renaissance paintings and aesthetic preferences. The reasons behind the fascination with the golden ratio remain unclear, but