Article
Chemistry, Analytical
Jian F. S. Pereira, Raquel G. Rocha, Silvia V. F. Castro, Afonso F. Joao, Pedro H. S. Borges, Diego P. Rocha, Abner de Siervo, Eduardo M. Richter, Edson Nossol, Rogerio Gelamo, Rodrigo A. A. Munoz
Summary: The study presents a rapid and chemical-free protocol for the surface treatment of 3D-printed conductive electrodes to enhance electrochemical activity, achieved by increasing oxide and graphitic groups through oxygen plasma treatment. This method significantly improves sensitivity and detection limit for electrochemical sensing of molecules, showing great promise for sensitive electrochemical sensors.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Materials Science, Multidisciplinary
Wang Xing, Dongna Liu, Qilin Qian, Peiran Zhu, Hehao Chen, He Lin, Wei Tan, Nanjia Zhou, Huijun Guo, Huan Qi, Huiping Tang
Summary: This paper proposes a novel 3D printing approach to construct self-supporting nickel electrodes with adjustable pore size and composition. The combustion-generated nickel microstructures provide the electrodes with robust mechanical and electrical properties and increased electrochemical active sites. The hierarchical porosity promotes charge transfer and mass transfer, resulting in reduced overpotentials for oxygen and hydrogen evolution reactions.
APPLIED MATERIALS TODAY
(2023)
Article
Electrochemistry
Edurne Redondo, Martin Pumera
Summary: By utilizing electrochemical activation and MXene functionalization, the electrochemical properties of 3D-printed electrodes can be enhanced to improve the performance of capacitors. This approach opens up new opportunities for further developments in electrochemical applications.
ELECTROCHEMISTRY COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Samantha F. Douman, Miren Ruiz De Eguilaz, Loanda R. Cumba, Stephen Beirne, Gordon G. Wallace, Zhilian Yue, Emmanuel I. Iwuoha, Robert J. Forster
Summary: This study describes the fabrication and electrochemical properties of a 3D printed titanium electrode array. Deposition of a thin gold layer significantly increases the electron transfer rate constant, leading to reversible voltammetry of ferrocyanide. The intensity of electrochemiluminescence is dramatically enhanced in gold-coated arrays.
FRONTIERS IN CHEMISTRY
(2021)
Review
Chemistry, Multidisciplinary
Mo Sha, Huaping Zhao, Yong Lei
Summary: The 3D architecture electrodes offer significant opportunities to enhance the energy density, power density, and lifespan of microbatteries and microsupercapacitors. Although applying 3D architecture electrodes to MBs and MSCs can effectively improve their performance, it also brings some challenges.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Analytical
Habdias A. Silva-Neto, Anderson A. Dias, Wendell K. T. Coltro
Summary: This article describes a complete 3D-printed system for bioanalytical applications, with high sensitivity and excellent analytical performance. The system consists of a batch injection analysis (BIA) cell and an electrochemical platform with eight sensing electrodes, all manufactured using 3D printing technology.
Article
Materials Science, Ceramics
Sukanya Maity, Anjana Anandan Vannathan, Tatinaidu Kella, Debaprasad Shee, Partha Pratim Das, Sib Sankar Mal
Summary: By integrating polyoxomolybdates into activated carbon, a nanohybrid electrode material for high-performance supercapacitors has been developed. The composite materials exhibited improved capacitance and energy density, with symmetric supercapacitor cells showing high capacitance and excellent cycle stability. The potential application of this nanohybrid electrode material has been demonstrated.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Xingyu Jiang, Zhiqiang Liang, Miao Wu, Jie Lu, Cheng Shi, Qi Wang, Zi Wang, Zhen Jin, Lin Jiang, Lizhen Huang, Lifeng Chi
Summary: This study presents a method for constructing high-performance accumulation-mode OECTs using a three-dimensional printed graphene oxide gate electrode. The approach exhibits exceptional mechanical flexibility and porosity properties, enabling fast ion/charge transport and high-throughput preparation.
Review
Nanoscience & Nanotechnology
Yanran Xun, Kaixi Zhang, Win Jonhson, Jun Ding
Summary: In this paper, the state-of-art 3D printing technologies and techniques used in water electrolysis systems are summarized. The suitability and advantages of 3D printing methods in developing and designing water-splitting reaction systems are thoroughly discussed. Recent progress demonstrating 3D-printed electrodes and water-splitting cells is reviewed, and future directions for this developing field of research are given along with current difficulties.
Article
Chemistry, Multidisciplinary
Bo Zhao, Jiawen Wu, Zhiqiang Liang, Wenkai Liang, He Yang, Dan Li, Wei Qin, Meiwen Peng, Yinghui Sun, Lin Jiang
Summary: This study demonstrates the construction of a bioinspired hierarchical fast transport network in a 3D printed reduced graphene oxide/carbon nanotube electrode, which exhibits superior electrochemical performance. The efficient utilization of surface area and catalysts enables high mass activity and low overpotential, resulting in improved stability and low voltage characteristics.
Article
Energy & Fuels
Ramesh Reddy Nallapureddy, Mohan Reddy Pallavolu, B. Hemanth Kumar, Rajasekhara Reddy Gutturu, Dhananjaya Merum, Anil Kumar Yedluri, Sang Woo Joo
Summary: Calcium and cobalt co-doped zinc oxide capsules (Ca-Co@ ZnO) fabricated through a single-step hydrothermal process exhibit outstanding supercapacitor performance, with specific capacitance 3.2, 1.7, and 1.6 times higher than pristine zinc oxide, calcium-doped zinc oxide, and cobalt-doped zinc oxide capsules, respectively. The Ca-Co@ZnO capsules also demonstrate excellent cycling stability.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Analytical
Bingnan Deng, Zhicong Ni, Wenhao Yang, Jiyue Hou, Rongwei Huang, Xue Li, Yiyong Zhang
Summary: This paper presents a method for growing three-dimensional nanometer reticular TiO2 (r-TiO2) on a Ti substrate using the hydrothermal method, and then depositing high-conductivity and high-capacity Sn metal on the r-TiO2 structure using electroless plating modification technology. The resulting r-Sn/TiO2 composite electrode shows enhanced specific surface area, increased specific capacity, and excellent rate capability, making it a promising material for high energy density and high current charging lithium-ion batteries.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Engineering, Electrical & Electronic
Bowen Liu, Junbo Wang, Jun Liu, Ning Liu, Ruiliang Song, Shutian Song
Summary: This article reports MEMS-based electrochemical angular accelerometers using planar electrodes with a micropillar array structure. The accelerometers convert external angular acceleration into an electrical signal based on liquid inertial mass and variations in reactive ion concentrations. The key structures of the planar electrodes were optimized through theoretical analysis and numerical simulations. The fabricated accelerometers were characterized and the results were consistent with the simulations. By increasing the electrode area by a factor of 1.67, the sensitivity level of devices with micropillar arrays was 1.60-1.78 times higher in the frequency range of 0.83-10 Hz compared to devices without micropillar arrays, with an improvement of over 70% at 10 Hz. This is crucial for expanding bandwidth and controlling noise levels. In summary, this article demonstrates the potential of MEMS-based electrochemical angular accelerometers for seismological applications through the performance optimization of integrated planar electrodes.
IEEE SENSORS JOURNAL
(2023)
Review
Materials Science, Multidisciplinary
Renpeng Chen, Yiming Chen, Lin Xu, Yu Cheng, Xuan Zhou, Yuyang Cai, Liqiang Mai
Summary: This review discusses the advantages and progress in using 3D printing technology to manufacture interdigital electrochemical energy storage devices, explores the material requirements, and highlights recent research developments in 3D printing of electrodes for batteries and supercapacitors.
JOURNAL OF MATERIALS RESEARCH
(2021)
Article
Electrochemistry
Eva Vaneckova, Milan Bousa, Violetta Shestivska, Jiri Kubista, Pavel Moreno-Garcia, Peter Broekmann, Motiar Rahaman, Martin Zlamal, Jan Heyda, Milan Bernauer, Tana Sebechlebska, Viliam Kolivoska
Summary: This study utilized 3D printing to manufacture catalysts for the electrochemical reduction of CO2 with promising results. Functionalized carbon nanotube-based electrodes printed by fused deposition modeling demonstrated performance characteristics approaching those of planar interfaces. The activity of the catalysts was inspected by monitoring the concentration of formate ions in the saturated CO2 solution, showing comparable efficiency to conventionally prepared micro-structured copper catalysts.
Article
Mathematics, Interdisciplinary Applications
Jose Oscar Gonzalez-Cervantes, Juan Bory-Reyes
Summary: In this paper, a fractional analog of the Borel-Pompeiu formula is established in a theoretical setting involving a fractional psi-Fueter operator that depends on an additional vector of complex parameters with fractional real parts. This serves as the first step towards developing a fractional psi-hyperholomorphic function theory and the related operator calculus.
FRACTALS-COMPLEX GEOMETRY PATTERNS AND SCALING IN NATURE AND SOCIETY
(2022)
Article
Mathematics, Applied
J. Oscar Gonzalez-Cervantes, Juan Bory-Reyes
Summary: The history of Bergman spaces dates back to the early fifties, with numerous papers devoted to this area. Key works provide a comprehensive summary and historical context, freeing researchers from having to refer to missing details.
JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS
(2022)
Article
Mathematics, Applied
Ricardo Abreu Blaya, Daniel Alfonso Santiesteban, Juan Bory Reyes, Arsenio Moreno Garcia
Summary: Euclidean Clifford analysis is a well-established theory in higher-dimensional Euclidean space, which has various applications. Inframonogenic functions, characterized by certain elliptic properties associated with the orthogonal Dirac operator in R-m, arise due to the noncommutativity of the geometric product in Clifford algebras. The main question addressed in this article is whether a higher-order Lipschitz function on the boundary of a Jordan domain can be decomposed into the sum of two boundary values of a sectionally inframonogenic function with a jump across the boundary.
MATHEMATICAL METHODS IN THE APPLIED SCIENCES
(2022)
Article
Physics, Multidisciplinary
Jazmin S. De la Cruz-Garcia, Juan Bory-Reyes, Aldo Ramirez-Arellano
Summary: Decision trees are data mining tools that create tree-like models. This paper introduces a decision tree based on a two-parameter fractional Tsallis entropy, which can generate a more sensitive measure for classification.
Article
Mathematics, Interdisciplinary Applications
J. O. S. E. O. S. C. A. R. GONZALEZ-CERVANTES, J. U. A. N. BORY-REYES
Summary: This paper continues our previous work on fractional operator calculus in quaternionic structures and extends it to holomorphic functions in two complex variables. By introducing additional complex parameters, the study proves analogues of Stokes and Borel-Pompieu formulas.
FRACTALS-COMPLEX GEOMETRY PATTERNS AND SCALING IN NATURE AND SOCIETY
(2022)
Article
Mathematics
Jose Luis Serrano Ricardo, Ricardo Abreu Blaya, Juan Bory Reyes, Jorge Sanchez Ortiz
Summary: The purpose of this paper is to solve a type of Riemann-Hilbert boundary value problem associated with two orthogonal bases in Euclidean space R-m. Using Clifford analysis, an explicit expression of the solution for this problem in a Jordan domain with a fractal boundary is obtained. Since the study involves a second-order differential operator, the boundary data is restricted to the higher order Lipschitz class.
GEORGIAN MATHEMATICAL JOURNAL
(2022)
Article
Mathematics, Applied
Jose Oscar Gonzalez-Cervantes, Juan Bory-Reyes
Summary: In this paper, we combine the fractional psi-$$ \psi - $$hyperholomorphic function theory with the fractional calculus with respect to another function. As a main result, a fractional Borel-Pompeiu type formula related to a fractional psi-$$ \psi - $$Fueter operator with respect to a vector-valued function is proved.
MATHEMATICAL METHODS IN THE APPLIED SCIENCES
(2023)
Article
Mathematics, Applied
Jose Oscar Gonzalez-Cervantes, Daniel Gonzalez-Campos, Juan Bory-Reyes
Summary: We provide some characterizations of Lipschitz type spaces of slice regular functions in the unit ball of the skew field of quaternions with prescribed modulus of continuity.
ANALYSIS AND MATHEMATICAL PHYSICS
(2022)
Article
Engineering, Multidisciplinary
Juan Bory-Reyes, Marco Antonio Perez-de la Rosa, Yudier Pena-Perez
Summary: This work introduces a fractional generalization of the classical Moisil-Teodorescu operator, providing a concise mathematical formulation for physical systems in various branches of science and engineering. The Stillinger's formalism is combined with quaternionic analysis in a novel way, and a quaternionic reformulation of a fractional time-harmonic Maxwell system is established, demonstrating a deep relation between its solutions and those of the perturbed fractional Moisil-Teodorescu operator. Furthermore, the fractional constructions here will have further applications in areas such as hydrodynamics and magneto hydrodynamics.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Mathematics, Applied
Jose Oscar Gonzalez-Cervantes, Dante Arroyo-Sanchez, Juan Bory-Reyes
Summary: In this paper, we prove a Cauchy's integral theorem and a Cauchy-type formula for certain inhomogeneous Cimmino system from the perspective of quaternionic analysis. The second part of the paper focuses on the applications of these results, particularly in four types of weighted Bergman spaces, reproducing kernels, projection, and conformal invariant properties.
JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS
(2023)
Article
Mathematics, Applied
Jose Oscar Gonzalez-Cervantes, Juan Bory-Reyes
Summary: Quaternionic analysis is a branch of classical analysis that studies the generalizations of Cauchy-Riemann equations in the quaternion skew field. In this study, we focus on II-valued (theta, u)-hyperholomorphic functions related to the kernel of the Helmholtz operator. Our goal is to discuss the theory of Bergman spaces for these functions in domains of C-2. We obtain various assertions, such as the existence of a reproducing kernel and their covariant and invariant properties.
COMPLEX ANALYSIS AND OPERATOR THEORY
(2023)
Article
Mathematics, Applied
Jose Oscar Gonzalez-Cervantes, Juan Bory-Reyes
Summary: The purpose of this paper is to establish a Borel-Pompeiu type formula generated from a fractional bicomplex (theta, phi)-weighted Cauchy-Riemann operator, where the weights are two hyperbolic orthogonal bicomplex functions and the fractionality is understood in the sense of Riemann-Liouville and Caputo approaches.
JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS
(2023)
Article
Mathematics, Applied
Daniel Alfonso Santiesteban, Ricardo Abreu Blaya, Juan Bory Reyes
Summary: In the framework of Clifford analysis, we consider boundary value problems for a second-order elliptic system of partial differential equations with bilinear vector-valued boundary conditions. The spectral properties of the sandwich operator are investigated using Fredholm theory. It is found that the problem-solving properties generally fail when the standard Dirac operator is replaced by those obtained via unusual orthogonal bases of Double-struck capital Rm$$ {\mathrm{\mathbb{R}}}<^>m $$.
MATHEMATICAL METHODS IN THE APPLIED SCIENCES
(2023)
Article
Mathematics, Interdisciplinary Applications
Aldo Ramirez-Arellano, Jazmin-Susana De-la-Cruz-Garcia, Juan Bory-Reyes
Summary: This article introduces the fractional (q, q')-information dimension and its dual version of entropy for complex networks. Experiments show that the fractional (q, q')-information dimension captures the complexity of network topology better than the classical information dimension based on Shannon entropy.
FRACTAL AND FRACTIONAL
(2023)
Article
Social Sciences, Mathematical Methods
Aldo Ramirez-Arellano, Jose Maria Sigarreta Almira, Juan Bory Reyes
Summary: This study introduces the fractional online learning rate (fOLR) model, which is based on the nonlinearity of individual students' learning pathway networks constructed from Learning Management System log files. The results show that the fOLR is a better model with a nonlinear relationship with overall grades. Additionally, student engagement has an impact on performance, highlighting the importance of designing enjoyable and engaging learning activities for improved learning achievements.
NONLINEAR DYNAMICS PSYCHOLOGY AND LIFE SCIENCES
(2022)
Article
Computer Science, Interdisciplinary Applications
Vitaly Chernik, Pavel Buklemishev
Summary: The paper introduces a simple 2D model for describing the cell motility on a homogeneous isotropic surface. The model incorporates the dynamics of complex actomyosin liquid, which affects the boundary dynamics and cell motility. It consists of a system of equations with a free boundary domain and includes a non-local term. The numerical solution of this model is presented in this work.
MATHEMATICS AND COMPUTERS IN SIMULATION
(2024)
Article
Computer Science, Interdisciplinary Applications
Hasan Karjoun, Abdelaziz Beljadid
Summary: In this study, we developed a numerical model based on the depth-averaged shallow water equations to simulate flows through vegetation field. The model takes into account the drag and inertia forces induced by vegetation, using different formulations for the stem drag coefficient. Turbulence induced by vegetation is also considered through the addition of diffusion terms in the momentum equations. The proposed numerical model is validated through numerical simulations and shows good accuracy in simulating overland flows under vegetation effects.
MATHEMATICS AND COMPUTERS IN SIMULATION
(2024)
Article
Computer Science, Interdisciplinary Applications
Bechir Naffeti, Hamadi Ammar, Walid Ben Aribi
Summary: This paper proposes a branch and bound multidimensional Holder optimization method, which converts a multivariate objective function into a single variable function and minimizes it using an iterative optimization method. The method is applied to solve a parameters identification problem resulting from the increase in infections, providing information about the prevalence and infection force.
MATHEMATICS AND COMPUTERS IN SIMULATION
(2024)
Article
Computer Science, Interdisciplinary Applications
Heba F. Eid, Erik Cuevas, Romany F. Mansour
Summary: The proposed modified Bonobo optimizer algorithm dynamically adjusts the trajectory of each search agent to overcome the flaw of the original algorithm and improve the performance and solution quality by exploring and exploiting different regions of the solution space.
MATHEMATICS AND COMPUTERS IN SIMULATION
(2024)
Article
Computer Science, Interdisciplinary Applications
Farshid Mehrdoust, Idin Noorani, Juho Kanniainen
Summary: This paper proposes a Markov-switching model to evaluate the dynamics of commodity futures and spot prices, and introduces a hidden Markov chain to model the sudden jumps in commodity prices. The model is calibrated using the crude oil spot price and estimation-maximization algorithm. The study also evaluates European call options written on crude oil futures under the regime-switching model and derives Greek formulas for risk assessment. The importance of this paper is rated at 8 out of 10.
MATHEMATICS AND COMPUTERS IN SIMULATION
(2024)
Article
Computer Science, Interdisciplinary Applications
Rupa Mishra, Tapas Kumar Saha
Summary: This paper presents a control scheme for distributed generation units to operate in stand-alone and grid-connected modes, with a smooth transition between the two. The control strategy includes predictive control for voltage and frequency regulation in stand-alone mode, and power control for symmetrical and unbalanced grid voltage conditions in grid-connected mode. The proposed control method improves power factor, reduces grid current harmonics, and eliminates grid frequency ripple.
MATHEMATICS AND COMPUTERS IN SIMULATION
(2024)
Article
Computer Science, Interdisciplinary Applications
Yu Wang, Yang Tian, Yida Guo, Haoping Wang
Summary: This paper proposes a multi-level control strategy for lower limb patient-exoskeleton coupling system (LLPECS) in rehabilitation training based on active torque. The controller consists of three sub-controllers: gait adjustment layer, interaction torque design layer, and trajectory tracking layer. The effectiveness of the proposed control strategy is demonstrated through co-simulations in the SimMechanics environment using an exoskeleton virtual prototype developed in SolidWorks.
MATHEMATICS AND COMPUTERS IN SIMULATION
(2024)
Article
Computer Science, Interdisciplinary Applications
Takuji Arai, Yuto Imai
Summary: The Barndorff-Nielsen and Shephard model is a jump-type stochastic volatility model, and this paper proposes two simulation methods for computing option prices under a representative martingale measure. The performance of these methods is evaluated through numerical experiments.
MATHEMATICS AND COMPUTERS IN SIMULATION
(2024)
Article
Computer Science, Interdisciplinary Applications
Wanai Li
Summary: This paper proposes a new framework that combines quadrature-based and quadrature-free discontinuous Galerkin methods and applies them to triangular and tetrahedral grids. Four different DG schemes are derived by choosing specific test functions and collocation points, improving computational efficiency and ease of code implementation.
MATHEMATICS AND COMPUTERS IN SIMULATION
(2024)
Article
Computer Science, Interdisciplinary Applications
Xiyuan Chen, Qiubao Wang
Summary: This paper introduces a technique that combines dynamical mechanisms and machine learning to reduce dimensionality in high-dimensional complex systems. The method utilizes Hopf bifurcation theory to establish a model paradigm and utilizes machine learning to train location parameters. The effectiveness and robustness of the proposed method are tested and validated through experiments and simulations.
MATHEMATICS AND COMPUTERS IN SIMULATION
(2024)
Article
Computer Science, Interdisciplinary Applications
Muhammad Farman, Aqeel Ahmad, Anum Zehra, Kottakkaran Sooppy Nisar, Evren Hincal, Ali Akgul
Summary: Diabetes is a significant public health issue that affects millions of people worldwide. This study proposes a mathematical model to understand the mechanisms of glucose homeostasis, providing valuable insights for diabetes management. The model incorporates fractional operators and analyzes the impact of a new wave of dynamical transmission on equilibrium points, offering a comprehensive understanding of glucose homeostasis.
MATHEMATICS AND COMPUTERS IN SIMULATION
(2024)
Article
Computer Science, Interdisciplinary Applications
Gholamreza Shobeyri
Summary: This study introduces two improved Laplacian models for more accurate simulation of free surface flows in the context of the MPS method. The higher accuracy of these models compared to the traditional methods is verified through solving 2D Poisson equations and solving three benchmark free surface flow problems. These models can also resolve the issue of wave damping in the original MPS computations.
MATHEMATICS AND COMPUTERS IN SIMULATION
(2024)
Article
Computer Science, Interdisciplinary Applications
Qiang Li, Jinling Liang, Weiqiang Gong, Kai Wang, Jinling Wang
Summary: This paper addresses the problem of nonfragile state estimation for semi-Markovian switching complex-valued networks with time-varying delay. By constructing an event-triggered generator and solving matrix inequalities, less conservative criteria are obtained, and the gains of the nonfragile estimator are explicitly designed. A numerical example is provided to demonstrate the effectiveness of the proposed estimation scheme.
MATHEMATICS AND COMPUTERS IN SIMULATION
(2024)
Article
Computer Science, Interdisciplinary Applications
Gengen Zhang, Jingyu Li, Qiong-Ao Huang
Summary: In this paper, a novel class of unconditionally energy stable schemes are constructed for solving gradient flow models by combining the relaxed scalar auxiliary variable (SAV) approach with the linear multistep technique. The proposed schemes achieve second-order temporal accuracy and strictly unconditional energy stability.
MATHEMATICS AND COMPUTERS IN SIMULATION
(2024)
Article
Computer Science, Interdisciplinary Applications
S. Clain, J. Figueiredo
Summary: This study proposes a detailed construction of a very high-order polynomial representation and introduces a functional to assess the quality of the reconstruction. Several optimization techniques are implemented and their advantages in terms of accuracy and stability are demonstrated.
MATHEMATICS AND COMPUTERS IN SIMULATION
(2024)
