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Regulating closed pore structure enables significantly improved sodium storage for hard carbon pyrolyzing at relatively low temperature

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SusMat 2022年第3期2卷 357-367页

作者： Siyu Zhou Zheng Tang Zhiyi Pan Yuancheng Huang Le Zhao Xi Zhang Dan Sun Yougen Tang Abdelghaffar S.Dhmees Haiyan Wang Hunan Provincial Key Laboratory of Chemical Power Sources College of Chemistry and Chemical EngineeringCentral South UniversityChangshaP.R.China Collaborative Innovation Center of Sustainable Energy Materials Guangxi Key Laboratory of Electrochemical Energy MaterialsGuangxi UniversityNanningP.R.China Department of Analysis and Evaluation Egyptian Petroleum Research InstituteCairoEgypt

The closed pore has been considered as the key structure for Na ion storage in hard ***,the traditional view is that closed pores can only be formed by the curling of graphite-like crystallites in the case of high temperature *** designing of closed pore structures at lower temperature is still ***,for the first time,engineering the wall thickness and number of closed pores in waste rosewood-derived hard carbon was successfully achieved at a low temperature of 1100℃ by removing the lignin and hemicellulose components in wood *** applied as an anode material,the optimum sample exhibits a high capacity of 326 mAh/g at 20 mA/g and a remarkable rate capability of 230mAh/g at 5000 mA/g,significantly higher than those of the untreated sample(only 33 mAh/g at 5000 mA/g).The significantly improved Na storage performance should be attributed to abundant closed pores that provide sufficient spaces forNa storage and thin porewall structure that is beneficial to the diffusion of Na^(+)in the bulk *** work provides a new idea for the future application of biomass-based hard carbon for advanced Na ion batteries.

关键词： closed pores plateau capacity sodium ion batteries waste biomass

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Path Planning for Underwater Glider Based on Ant Colony Algorithm Guided by Artificial Potential Field 6

Path Planning for Underwater Glider Based on Ant Colony Algo...

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6th International Conference on Communication, Image and Signal Processings, CCISP 2021

作者： Jin, Xiantao Huang, Chuangxia Bao, Changchun School of Mathematics and Statistics Changsha University of Science and Technology College of Meteorology and Oceanography National University of Defense Technology Changsha410073 China Hunan Provincial Key Laboratory of Mathematical Modeling and Analysis in Engineering Changsha University of Science and Technology Changsha410114 China College of Meteorology and Oceanography National University of Defense Technology Changsha410073 China

ISBN: (纸本)9781665432795

This paper studies the path planning of underwater gliders in a global static environment, and proposes an improved algorithm based on ant colony algorithm, which eliminates the problem of slow convergence due to the lack of initial pheromone in path planning of ant colony algorithm. Firstly, according to the operating characteristics of the glider, the grid method is used to model the known marine environment;Secondly, the improved artificial potential field method is introduced to construct the heuristic information function to speed up the convergence speed of the ant colony algorithm;Finally, the ant colony algorithm is used to search Path, improve the original pheromone update rule of the ant colony algorithm. The simulation results show that the algorithm in this paper is effective and superior. © 2021 IEEE.

关键词： Motion planning

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Spherical Linear Diophantine Fuzzy Sets with modeling Uncertainties in MCDM

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Computer modeling in engineering & Sciences 2021年第3期126卷 1125-1164页

作者： Muhammad Riaz Masooma Raza Hashmi Dragan Pamucar Yu-Ming Chu Department of Mathematics University of the PunjabLahore54590Pakistan Department of Logistics Military academyUniversity of DefenceBelgrade11000Serbia Department of Mathematics Huzhou UniversityHuzhou313000China Hunan Provincial Key Laboratory of MathematicalModeling and Analysis in Engineering Changsha University of Science&TechnologyChangsha410114China

The existing concepts of picture fuzzy sets(PFS),spherical fuzzy sets(SFSs),T-spherical fuzzy sets(T-SFSs)and neutrosophic sets(NSs)have numerous applications in decision-making problems,but they have various strict limitations for their satisfaction,dissatisfaction,abstain or refusal *** relax these strict constraints,we introduce the concept of spherical linearDiophantine fuzzy sets(SLDFSs)with the inclusion of reference or control parameters.A SLDFSwith parameterizations process is very helpful formodeling uncertainties in themulti-criteria decisionmaking(MCDM)*** can classify a physical systemwith the help of reference *** discuss various real-life applications of SLDFSs towards digital image processing,network systems,vote casting,electrical engineering,medication,and selection of optimal *** show some drawbacks of operations of picture fuzzy sets and their corresponding aggregation *** new operations on picture fuzzy sets are also *** fundamental operations on SLDFSs and different types of score functions of spherical linear Diophantine fuzzy numbers(SLDFNs)are *** aggregation operators named spherical linear Diophantine fuzzy weighted geometric aggregation(SLDFWGA)and spherical linear Diophantine fuzzy weighted average aggregation(SLDFWAA)operators are developed for a robust MCDM *** application of the proposed methodology with SLDF information is *** comparison analysis of the final ranking is also given to demonstrate the validity,feasibility,and efficiency of the proposed MCDM approach.

关键词： Spherical linear Diophantine fuzzy set new operations of picture fuzzy sets spherical linear Diophantine fuzzy weighted geometric aggregation operator spherical linear Diophantine fuzzy weighted average aggregation operator MCDM

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Stability analysis and modeling for the three-dimensional Darcy-Forchheimer stagnation point nanofluid flow towards a moving surface

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Applied Mathematics and Mechanics(English Edition) 2021年第3期42卷 357-370页

作者： Yuming CHU M.I.KHAN M.I.U.REHMAN S.KADRY S.QAYYUM M.WAQAS Department of Mathematics Huzhou UniversityHuzhou 313000Zhejiang ProvinceChina Hunan Provincial Key Laboratory of Mathematical Modeling and Analysis in Engineering Changsha University of Science&TechnologyChangsha 410114China Department of Mathematics Riphah International UniversityFaisalabad CampusFaisalabad 38000Pakistan Department of Mathematics Quaid-i-Azam UniversityIslamabad 44000Pakistan Department of Mathematics and Computer Science Beirut Arab UniversityBeirut 11072809Lebanon NUTECH School of Applied Sciences and Humanities National University of TechnologyIslamabad 44000Pakistan

In this research,the three-dimensional(3D)steady and incompressible laminar Homann stagnation point nanofluid flow over a porous moving surface is *** disturbance in the porous medium has been characterized by the Darcy-Forchheimer *** slip for viscous fluid is *** energy equation is organized in view of radiative heat flux which plays an important role in the heat transfer *** governing flow expressions are first altered into first-order ordinary ones and then solved numerically by the shooting *** solutions are obtained for the velocity,skin friction coefficient,temperature,and Nusselt number subject to sundry flow parameters,magnetic parameter,Darcy-Forchheimer number,thermal radiation parameter,suction parameter,and dimensionless slip *** this research,the main consideration is given to the engineering interest like skin friction coefficient(velocity gradient or surface drag force)and Nusselt number(temperature gradient or heat transfer rate)and discussed numerically through *** conclusion,it is noticed from the stability results that the upper branch solution(UBS)is more reliable and physically stable than the lower branch solution(LBS).

关键词： viscous slip Darcy-Forchheimer relation thermal radiation stagnation point flow dual solution heat generation/absorption stability result

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Application of Modified Extended Tanh Technique for Solving Complex Ginzburg-Landau Equation Considering Kerr Law Nonlinearity

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Computers, Materials & Continua 2021年第2期66卷 1369-1378页

作者： Yuming Chu Muhannad A.Shallal Seyed Mehdi Mirhosseini-Alizamini Hadi Rezazadeh Shumaila Javeed Dumitru Baleanu Department of Mathematics Huzhou UniversityHuzhou313000China Hunan Provincial Key Laboratory of Mathematical Modeling and Analysis in Engineering Changsha University of Science&TechnologyChangsha410114China Mathematics Department College of ScienceUniversity of KirkukKirkukIraq Department of Mathematics Payame Noor UniversityTehranIran Amol University of Special Modern Technologies AmolIran Department of Mathematics COMSATS University IslamabadChak Shahzad Islamabad45550Pakistan Department of Mathematics Cankaya UniversityAnkaraTurkey Institute of Space Sciences Magurele-BucharestRomania

The purpose of this work is to find new soliton solutions of the complex Ginzburg–Landau equation(GLE)with Kerr law *** considered equation is an imperative nonlinear partial differential equation(PDE)in the field of *** applications of complex GLE can be found in optics,plasma and other related *** modified extended tanh technique with Riccati equation is applied to solve the Complex *** results are presented under a suitable choice for the values of *** are shown using the three and two-dimensional plots to represent the shape of the solution in real,and imaginary parts in order to discuss the similarities and difference between *** graphical representation of the results depicts the typical behavior of soliton *** obtained soliton solutions are of different forms,such as,hyperbolic and trigonometric *** results presented in this paper are novel and reported first time in the *** results establish the validity and applicability of the suggested technique for the complex *** suggested method with symbolic computational software such as,Mathematica and Maple,is proven as an effective way to acquire the soliton solutions of nonlinear partial differential equations(PDEs)as well as complex PDEs.

关键词： Modified extended tanh technique soliton solution complex Ginzburg-Landau equation Riccati equation

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Study on fractional fejÉr-hadamard type inequalities associated with generalized exponentially convexity

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UPB Scientific Bulletin, Series A: Applied Mathematics and Physics 2021年第4期83卷 159-170页

作者： Farid, Ghulam Guran, Liliana Qiang, Xiaoli Chu, Yu-Ming Department of Mathematics COMSATS University Islamabad Attock Campus Pakistan Department of Pharmaceutical Sciences "Vasile Goldiş" Western University L. Rebreanu Street no. 86 Arad310048 Romania Institute of Computing Science and Technology Guangzhou University Guangzhou510006 China Department of Mathematics Huzhou University Huzhou313000 China Hunan Provincial Key Labo-ratory of Mathematical Modeling and Analysis in Engineering Changsha University of Science & Technology Changsha410114 China

In this paper fractional integral inequalities of Fejér-Hadamard type for a generalized notion of convexity are established. A new generalization of convexity named exponentially (α, h − m)-convex function unifies exponentially (h − m)-convex, exponentially (α − m)-convex and exponentially (s, m)-convex functions. By using the generalized fractional integral operators involving Mittag-Leffler function via a monotonically increasing function we have obtained some fractional versions of Fejér-Hadamard inequality for the generalized convexity. The obtained results lead to many inequalities of Fejér-Hadamard and Hadamard type for well-known fractional integral operators and different kinds of convexities. © 2021, Politechnica University of Bucharest. All rights reserved.

关键词： mathematical operators

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Temporal Stability analysis of Magnetized Hybrid Nanofluid Propagating through an Unsteady Shrinking Sheet: Partial Slip Conditions

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Computers, Materials & Continua 2021年第2期66卷 1963-1975页

作者： Liaquat Ali Lund Zurni Omar Sumera Dero Yuming Chu Ilyas Khan Kottakkaran Sooppy Nisar School of Quantitative Sciences Universiti Utara Malaysia06010SintokKedahMalaysia KCAET Khairpur Mir’s Sindh Agriculture UniversityTandojam Sindh70060Pakistan IICT University of SindhJamshoro76080Pakistan Department of Mathematics Huzhou UniversityHuzhou313000China Hunan Provincial Key Laboratory of Mathematical Modeling and Analysis in Engineering Changsha University of Science&TechnologyChangsha410114China Faculty of Mathematics and Statistics Ton Duc Thang UniversityHo Chi Minh CityVietnam Department of Mathematics College of Arts and SciencesPrince Sattam bin Abdulaziz UniversityWadi AldawaserSaudi Arabia

The unsteady magnetohydrodynamic(MHD)flow on a horizontal preamble surface with hybrid nanoparticles in the presence of the first order velocity and thermal slip conditions are ***(Al_(2)O_(3))and copper(Cu)are considered as hybrid nanoparticles that have been dispersed in water in order to make hybrid nanofluid(Cu-Al_(2)O_(3)/water).The system of similarity equations is derived from the system of partial differential equations(PDEs)by using variables of similarity,and their solutions are gotten with shooting method in the Maple *** certain ranges of unsteadiness and magnetic parameters,the presence of dual solutions can be ***,it is examined that layer separation is deferred due to the effect of the hybrid ***,the capacity of the thermal enhancement of Cu-Al_(2)O_(3)/water hybrid nanofluid is higher as compared to Al_(2)O_(3)/water based nanofluid and enhancements inCu are caused to rise the fluid temperature in both *** the last,solutions stability analyzes were also carried out and the first solution was found to be stable.

关键词： Cu−Al_(2)O_(3)/H2O hybrid nanofluid magnetic field slip conditions dual solutions

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Regular perturbation solution of Couette flow(non-Newtonian)between two parallel porous plates: a numerical analysis with irreversibility

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Applied Mathematics and Mechanics(English Edition) 2021年第1期42卷 127-142页

作者： M.NAZEER M.I.KHAN S.KADRY Yuming CHU F.AHMAD W.ALI M.IRFAN M.SHAHEEN Department of Mathematics Institute of Arts and SciencesGovernment College UniversityChiniot CampusFaisalabad 35400Pakistan Department of Mathematics and Statistics Riphah International University I-14Islamabad 44000Pakistan Department of Mathematics and Computer Science Beirut Arab UniversityBeirut 11-5020Lebanon Department of Mathematics Huzhou UniversityHuzhou 313000Zhejiang ProvinceChina Hunan Provincial Key Laboratory of Mathematical Modeling and Analysis in Engineering Changsha University of Science&TechnologyChangsha 410114China Department of Applied Sciences National Textile UniversityFaisalabad 38000Pakistan Chair of Production Technology Faculty of Engineering TechnologyUniversity of TwenteEnschede 7500 AEThe Netherlands Department of Mathematics Riphah Inernational LniversityFaisalabad CampusFaiselabad 38000Pakistan

The unavailability of wasted energy due to the irreversibility in the process is called the entropy *** irreversible process is a process in which the entropy of the system is *** second law of thermodynamics is used to define whether the given system is reversible or ***,our focus is how to reduce the entropy of the system and maximize the capability of the *** are many methods for maximizing the capacity of heat *** constant pressure gradient or motion of the wall can be used to increase the heat transfer rate and minimize the *** objective of this study is to analyze the heat and mass transfer of an Eyring-Powell fluid in a porous *** this,we choose two different fluid models,namely,the plane and generalized Couette *** flow is generated in the channel due to a pressure gradient or with the moving of the upper *** present analysis shows the effects of the fluid parameters on the velocity,the temperature,the entropy generation,and the Bejan *** nonlinear boundary value problem of the flow problem is solved with the help of the regular perturbation *** validate the perturbation solution,a numerical solution is also obtained with the help of the built-in command NDSolve of MATHEMATICA *** velocity profile shows the shear thickening behavior via first-order Eyring-Powell *** is also observed that the profile of the Bejan number has a decreasing trend against the Brinkman ***ηi→0(i=1,2,3),the Eyring-Powell fluid is transformed into a Newtonian fluid.

关键词： Couette flow Eyring-Powell fluid entropy generation perturbation method Bejan number

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Periodicity of non-autonomous inertial neural networks involving proportional delays and non-reduced order method

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International Journal of Biomathematics 2019年第2期12卷 101-113页

作者： Chuangxia Huang Hua Zhang School of Mathematics and Statistics Changsha University of Science and Technology P.R.China Hunan Provincial Key Laboratory of Mathematical Modeling and Analysis in Engineering Changsha 410114HunanP.R.China

This paper,mainly explores a class of non-autonomous inertial neural networks with proportional delays and time-varying *** combining Lyapunov function method with differential inequality approach,non-reduced order method is used to establish some novel assertions on the existence and generalized exponential stability of periodic solutions for the addressed *** addition,an example and its numerical simulations are given to support the proposed approach.

关键词： Inertial neural networks periodic solution generalized exponential stability proportional delay non-reduced order method

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Interpretation of entropy generation in Williamson fluid flow with nonlinear thermal radiation and first-order velocity slip

Interpretation of entropy generation in Williamson fluid flo...

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作者： Qayyum, Sumaira Khan, M. Ijaz Masood, Faria Chu, Yu-Ming Kadry, Seifedine Nazeer, Mubbashar Department of Mathematics Quaid-I-Azam University Islamabad Pakistan Department of Mathematics Riphah International University Faisalabad Faisalabad Pakistan Department of Mathematics Huzhou University Huzhou China Hunan Provincial Key Laboratory of Mathematical Modeling and Analysis in Engineering Changsha University of Science and Technology Changsha China Department of Mathematics and Computer Science Beirut Arab University Beirut Lebanon Department of Mathematics Institute of Arts and Sciences Government College University Faisalabad Faisalabad Pakistan

This research article investigates the impacts of magnetohydrodynamics (MHD), nonlinear thermal radiation, Darcy-Forchheimer porous medium, viscous dissipation, first-order velocity slip, and convective boundary condition on the entropy generation optimization in flow of non-Newtonian fluid (Williamson fluid) towards a flat and stretchable surface. A general entropy equation is derived for thermal heat irreversibility, porosity irreversibility, Joule heating irreversibility, and fluid friction irreversibility. The bvp4c (built-in-shooting) technique is utilized to solve the governing equations for the entropy generation. Our obtained results highlight that enhancement in the thermal radiation and magnetic causes an abrupt change in the entropy generation rate. Moreover, the heat transfer rate and velocity gradient (skin friction) are calculated numerically subject to pertinent parameter, and the results are displayed in tabular form. © 2020 John Wiley & Sons, Ltd.

关键词： Heat radiation

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