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Finite difference scheme on graded meshes to the timefractional neutron diffusion equation with nonsmooth solutions Appl. Math. Comput. (IF 4.397) Pub Date : 20220814
Yingying Xie, Daopeng Yin, Liquan MeiIn this paper, we construct and analyze an efficient numerical scheme based on graded meshes in time for solving the fractional neutron diffusion equation with delayed neutrons and nonsmooth solutions, which can be found everywhere in nuclear reactors. Using the L1 discretization of each time fractional derivatives on graded meshes and the classical finite difference for the spatial derivatives on

Improved Adaptive Fuzzy Control for NonStrict Feedback Nonlinear Systems: a Dynamic Compensation System Approach Appl. Math. Comput. (IF 4.397) Pub Date : 20220814
Dawei Wu, Yonghui Sun, Rongsheng Xia, Shumin LuThis paper investigates the tracking control problem for uncertain nonlinear nonstrict feedback systems (NSFSs) in the presence of fullstate constraints and unmeasured disturbances. It is of great practical significance to realize the fullstate constraint under disturbed conditions. In view of the nonstrict feedback problem, a novel design framework of the state feedback control is given based

The dynamical functional particle method for multiterm linear matrix equations Appl. Math. Comput. (IF 4.397) Pub Date : 20220814
Andrii Dmytryshyn, Massimiliano Fasi, Mårten GullikssonRecent years have seen a renewal of interest in multiterm linear matrix equations, as these have come to play a role in a number of important applications. Here, we consider the solution of such equations by means of the dynamical functional particle method, an iterative technique that relies on the numerical integration of a damped second order dynamical system. We develop a new algorithm for the

An iterative framework to solve nonlinear optimal control with proportional delay using successive convexification and symplectic multiinterval pseudospectral scheme Appl. Math. Comput. (IF 4.397) Pub Date : 20220814
Xinwei Wang, Jie Liu, Haijun Peng, Xudong ZhaoIn this paper, we propose an iterative framework to solve optimal control for nonlinear proportional statedelay systems. The successive convexification technique is first implemented to convert the original nonlinear problem into a sequence of linearquadratic problems. And a symplectic pseudospectral method, where the multiinterval pseudospectral scheme is applied with a proportional mesh, to solve

Numerical analysis for solving AllenCahn equation in 1D and 2D based on higherorder compact structurepreserving difference scheme Appl. Math. Comput. (IF 4.397) Pub Date : 20220812
Kanyuta Poochinapan, Ben WongsaijaiIn this paper, we present a fourthorder difference scheme for solving the AllenCahn equation in both 1D and 2D. The proposed scheme is described by the compact difference operators together with the additional stabilized term. As a matter of fact, the AllenCahn equation contains the nonlinear reaction term which is eminently proved that numerical schemes are mostly nonlinear. To solve the complexity

Quantitative analysis of incipient fault detectability for timevarying stochastic systems based on weighted moving average approach Appl. Math. Comput. (IF 4.397) Pub Date : 20220812
Ming Gao, Yichun Niu, Li Sheng, Donghua ZhouIn this paper, the problem of incipient fault detection is investigated for linear timevarying (LTV) systems with stochastic noises. The fault detectability in a probabilistic sense is defined for LTV stochastic systems by considering false alarm rate (FAR) and missed detection rate (MDR) simultaneously. Necessary and sufficient conditions are derived to reveal the relationship among the fault amplitude

Relaxed observerbased stabilization and dissipativity conditions of TS fuzzy systems with nonhomogeneous Markov jumps via nonPDC scheme Appl. Math. Comput. (IF 4.397) Pub Date : 20220813
Won Il Lee, Bum Yong Park, Sung Hyun KimThis paper aims to design a robust observerbased dissipative controller for discretetime Takagi–Sugeno (TS) fuzzy systems with nonhomogeneous Markov jumps through a nonparallel distributed compensation (nonPDC) scheme. Based on a modedependent nonquadratic Lyapunov function, the final form of the stabilization conditions is expressed as linear matrix inequalities in a less conservative manner

A computational approach for a twoparameter singularly perturbed system of partial differential equations with discontinuous coefficients Appl. Math. Comput. (IF 4.397) Pub Date : 20220810
K. Aarthika, V. Shanthi, Higinio RamosThis work aims at obtaining a numerical approximation to the solution of a twoparameter singularly perturbed convectiondiffusionreaction system of partial differential equations with discontinuous coefficients. This discontinuity, together with small values of the perturbation parameters, causes interior and boundary layers to appear in the solution. To obtain appropriate pointwise accuracy, we

On fractional discrete pLaplacian equations via Clark’s theorem Appl. Math. Comput. (IF 4.397) Pub Date : 20220809
Chunming Ju, Binlin ZhangIn this article, we are interested in the fractional discrete pLaplacian equations on the integers involving different nonlinearities. By employing Clark’s theorem and its variants, we prove the multiplicity of homoclinic solutions to the above equations.

Sparse grid method for highly efficient computation of exposures for xVA Appl. Math. Comput. (IF 4.397) Pub Date : 20220810
Lech A. GrzelakEvery “x”adjustment in the socalled xVA financial risk management framework relies on the computation of exposures. Considering thousands of Monte Carlo paths and tens of simulation steps, a financial portfolio needs to be evaluated numerous times during the lifetime of the underlying assets. This is the bottleneck of every simulation of xVA. In this article, we explore numerical techniques for improving

Eventtriggered adaptive neural commandfilterbased dynamic surface control for state constrained nonlinear systems Appl. Math. Comput. (IF 4.397) Pub Date : 20220810
Yu Hua, Tianping Zhang, Xiaonan XiaIn this article, an eventtriggered adaptive neural commandfilterbased dynamic surface control (CFDSC) is discussed for states constrained nonstrictfeedback nonlinear systems with dynamic uncertainties. The orderreduced compensation signals are designed to compensate the tracking error of the filter in original dynamic surface control (DSC). The hyperbolic tangent function is adopted as the invertible

Effect of higherorder interactions on synchronization of neuron models with electromagnetic induction Appl. Math. Comput. (IF 4.397) Pub Date : 20220810
Mohanasubha Ramasamy, Subhasri Devarajan, Suresh Kumarasamy, Karthikeyan RajagopalRecent studies have shown that higherorder interactions have a vital role in exploring the collective dynamics of the networks. In particular, the collective behavior of a network of neuron models with manybody interactions has received much attention among researchers in recent times. In this paper, we study the effect of higherorder interactions in the synchronization stability of the network

On the construction of polynomial minimal surfaces with Pythagorean normals Appl. Math. Comput. (IF 4.397) Pub Date : 20220808
Rida T. Farouki, Marjeta Knez, Vito Vitrih, Emil ŽagarA novel approach to constructing polynomial minimal surfaces (surfaces of zero mean curvature) with isothermal parameterization from Pythagorean triples of complex polynomials is presented, and it is shown that they are Pythagorean normal (PN) surfaces, i.e., their unit normal vectors have a rational dependence on the surface parameters. This construction generalizes a prior approach based on Pythagorean

Characterization of microcapsules deformation in branching channels Appl. Math. Comput. (IF 4.397) Pub Date : 20220808
A. Coclite, M.D. de Tullio, G. Pascazio, T. PolitiIn this paper, the dynamic of inertial capsules into microfluidic bifurcations is studied. The fluid evolution is based on the solution of the BGK – lattice Boltzmann scheme including a forcing term accounting for immersed geometries. The dynamicImmersed Boundary forcing strategy is adopted for imposing noslip boundary conditions on moving deformable or rigid structures, while, on fixed immersed

High order semiimplicit schemes for viscous compressible flows in 3D Appl. Math. Comput. (IF 4.397) Pub Date : 20220808
Walter Boscheri, Maurizio TavelliIn this article we present a high order cellcentered numerical scheme in space and time for the solution of the compressible NavierStokes equations. To deal with multiscale phenomena induced by the different speeds of acoustic and material waves, we propose a semiimplicit time discretization which allows the CFLstability condition to be independent of the fast sound speed, hence improving the efficiency

Fault detection filtering for MNNs with dynamic quantization and improved protocol Appl. Math. Comput. (IF 4.397) Pub Date : 20220808
An Lin, Jun Cheng, Jinde Cao, Hailing Wang, Ahmed AlsaediThis paper concerns the fault detection filtering problem for discretetime memristive neural networks with mixed time delays. An improved dynamic eventtriggering protocol, whose multiple threshold functions are dynamically adjustable, is presented to decrease the utilization of limited resources and achieve desired performance. Two mutually independent Bernoulli variables are given to depicting the

Extremal symmetric division deg index of molecular trees and molecular graphs with fixed number of pendant vertices Appl. Math. Comput. (IF 4.397) Pub Date : 20220808
Jianwei Du, Xiaoling SunIn 2018, Furtula et al. proved that the symmetric division deg index is a viable and applicable topological index in QSPR/QSAR investigations. In this article, we identify the extremal trees with respect to symmetric division deg index among all molecular trees with fixed number of pendant vertices. In addition, we get a lower bound on symmetric division deg index for all molecular (n,m,p)graphs (norder

Implementation of fractionalorder difference via TakenakaMalmquist functions Appl. Math. Comput. (IF 4.397) Pub Date : 20220807
Rafał Stanisławski, Kamil Kozioł, Marek RydelThe paper presents a new definition of nabla fractionalorder difference, equivalent to the GrünwaldLetnikov difference. The difference is based on the general approach of orthonormal basis functions in terms of discretetime TakenakaMalmquist filters. The main advantage of the proposed definition is that for finite model length, the model quickly converges to the actual difference. The paper proposes

Nash social distancing games with equity constraints: How inequality aversion affects the spread of epidemics Appl. Math. Comput. (IF 4.397) Pub Date : 20220807
Ioannis Kordonis, AthanasiosRafail Lagos, George P. PapavassilopoulosIn this paper, we present a gametheoretic model describing voluntary social distancing during the spread of an epidemic. The payoffs of the agents depend on the social distancing they practice and on the probability of getting infected. We consider two types of agents: the nonvulnerable agents with a small cost if they get infected and the vulnerable agents with a higher cost. For the modeling of

Bifurcation analysis of a spatial vegetation model Appl. Math. Comput. (IF 4.397) Pub Date : 20220807
HongTao Zhang, YongPing Wu, GuiQuan Sun, Chen Liu, GuoLin FengVegetation pattern can describe spatial feature of vegetation in arid ecosystem. Soilwater diffusion is of vital importance in spatial structures of vegetation, which is not comprehensively understood. In this thesis, we reveal the impact of soilwater diffusion on vegetation patterns through steadystate bifurcation analysis. The result indicates that if soilwater diffusion coefficient is appropriately

Numerical solutions of the Allen–Cahn equation with the pLaplacian Appl. Math. Comput. (IF 4.397) Pub Date : 20220807
Dongsun Lee, Chaeyoung LeeWe investigate the behavior of the numerical solutions of the pLaplacian Allen–Cahn equation. Because of the pLaplacian’s challenging numerical properties, many different methods have been proposed for the discretized pLaplacian. In this paper, we provide and analyze a numerical scheme for the boundedness of solutions and energy decay properties. For a comprehensive understanding of the effect of

Chaos in the bordercollision normal form: A computerassisted proof using induced maps and invariant expanding cones Appl. Math. Comput. (IF 4.397) Pub Date : 20220806
P.A. Glendinning, D.J.W. SimpsonIn some maps the existence of an attractor with a positive Lyapunov exponent can be proved by constructing a trapping region in phase space and an invariant expanding cone in tangent space. If this approach fails it may be possible to adapt the strategy by considering an induced map (a first return map for a wellchosen subset of phase space). In this paper we show that such a construction can be applied

Numerical integration of an agestructured population model with infinite life span Appl. Math. Comput. (IF 4.397) Pub Date : 20220805
L.M. Abia, O. Angulo, J.C. LópezMarcos, M.A. LópezMarcosThe choice of age as a physiological parameter to structure a population and to describe its dynamics involves the election of the lifespan. The analysis of an unbounded lifespan agestructured population model is motivated because, not only new models continue to appear in this framework, but also it is required by the study of the asymptotic behaviour of its dynamics. The numerical integration

Backstepping control for fractional discretetime systems Appl. Math. Comput. (IF 4.397) Pub Date : 20220805
Yu Yao, LiBing WuThis paper presents a backstepping control for a class of singleinputsingleoutput (SISO) strictfeedback fractional discretetime systems for the first time. By tracking state variables in error functions, the stability criterion is used to design a controller such that the closedloop system is stable. Finally, two simulation examples are demonstrated. By using different fractional order parameters

Stability analysis of impulsive stochastic delayed CohenGrossberg neural networks driven by Lévy noise Appl. Math. Comput. (IF 4.397) Pub Date : 20220802
Peilin Yu, Feiqi Deng, Yuanyuan Sun, Fangzhe WanThis note investigates the stabilities for impulsive stochastic delayed CohenGrossberg neural networks driven by Lévy noise (ISDCGNNsLN), including the inputtostate stability (ISS), integral inputtostate stability (iISS) and ϕθ(t)weight inputtostate stability (ϕθ(t)weight ISS, θ>0). Utilizing the multiple LyapunovKrasovskii (LK) functions, principle of comparison, constant variation method

Resilient filter of nonlinear network systems with dynamic eventtriggered mechanism and hybrid cyber attack Appl. Math. Comput. (IF 4.397) Pub Date : 20220804
QiXin Chen, XiaoHeng ChangIn this paper, the problem of H∞ resilient filter for nonlinear network systems with dynamic eventtriggered mechanism and hybrid cyber attack is discussed. The TakagiSugeno (TS) fuzzy technique is applied to deal with the nonlinearity of network systems. For the obtained TS fuzzy model, the system measurement output is assumed to transfer to the filter by network channels. A novel dynamic eventtriggered

Adaptive sliding mode consensus control based on neural network for singular fractional order multiagent systems Appl. Math. Comput. (IF 4.397) Pub Date : 20220802
Xuefeng Zhang, Shunan Chen, JinXi ZhangIn this paper, a suitable state feedback sliding mode controller is designed for the singular fractional order multiagent systems (SFOMASs) with uncertainty, in order to realize the consensus problem of multiagent. First, the sliding mode of the designed SFOMAS is in the form of singular systems. The criterion for the admissible consensus of sliding mode is given by using linear matrix inequality

Distributed filtering for timevarying statesaturated systems with packet disorders: An eventtriggered case Appl. Math. Comput. (IF 4.397) Pub Date : 20220801
Jiaxing Li, Jun Hu, Jun Cheng, Yunliang Wei, Hui YuThis paper investigates the distributed filtering (DF) issue for a class of timevarying statesaturated systems with packet disorders (PDs) via the eventtriggered communication mechanism (ETCM). The random transmission delays, which can be characterized by a set of random variables obeying certain probability distribution, cause the phenomenon of PDs. In addition, for the sake of decreasing the consumption

Dualchannel supply chain coordination considering credit sales competition Appl. Math. Comput. (IF 4.397) Pub Date : 20220731
Xiuqing Mu, Kai Kang, Jing ZhangCredit sales not only help sellers expand sale size and promote competitiveness, but also relieve the pressure of customers cash flow, but inevitably increases channel conflict and generates capital opportunity cost. This article attempts to consider a dualchannel supply chain operation decision and coordination under credit sales transactions for the first time, in which the supplier and the retailer

Enumeration of subtrees of planar twotree networks Appl. Math. Comput. (IF 4.397) Pub Date : 20220730
Daoqiang Sun, Long Li, Kai Liu, Hua Wang, Yu YangThe number of subtrees, also referred to as the subtrees index, is a key parameter to measure graph structures such as networks. In this paper, we investigate the number of subtrees of planar twotree networks. By “adding a virtual edge” and “edge orientation”, we present a linear time algorithm for computing the number of subtrees of planar twotree networks, as well as a family of planar twoconnected

Maximisers of the hypergraph Lagrangian outside the principal range Appl. Math. Comput. (IF 4.397) Pub Date : 20220730
Ran Gu, Hui Lei, Yuejian Peng, Yongtang ShiThe Lagrangian of a hypergraph is a function that has featured notably in hypergraph Turán densities. Motzkin and Straus established the relationship between Lagrangian and the maximum clique in a graph. As a generalization of MotzkinStraus Theorem, Frankl and Füredi put forward a wellknown conjecture, which states that the rgraph with m edges formed by taking the first m sets in the colex ordering

Noiseinputtostate stability analysis of switching stochastic nonlinear systems with modedependent multiple impulses Appl. Math. Comput. (IF 4.397) Pub Date : 20220730
Ticao Jiao, Xiaomei Qi, Jishun Jiang, Mingzheng YuIn this study, the problem of noiseinputtostate stability for switching stochastic nonlinear systems with impulses is investigated. There are two outstanding features of the investigated systems: (a) the occurrences of swithcings and impulses are allowed to be asynchronous; (b) the impulsive maps not only depend on the subsystems but also are different for the different impulsive instants. The

An investigation of space distributedorder models for simulating anomalous transport in a binary medium Appl. Math. Comput. (IF 4.397) Pub Date : 20220729
Libo Feng, Ian Turner, Timothy Moroney, Fawang LiuRecent studies highlight that diffusion processes in highly heterogeneous, fractallike media can exhibit anomalous transport phenomena, which motivates us to consider the use of generalised transport models based on fractional operators. In this work, we harness the properties of the distributedorder space fractional potential to provide a new perspective on dealing with boundary conditions for nonlocal

Twogrid finite element methods for nonlinear time fractional variable coefficient diffusion equations Appl. Math. Comput. (IF 4.397) Pub Date : 20220729
Yunhua Zeng, Zhijun TanIn this article, an efficient twogrid finite element method is proposed for solving the nonlinear time fractional variable coefficient diffusion equations. This algorithm firstly solves a nonlinear system to get the numerical solution uHn on the coarse grid with size H, then based on the initial iterative solution uHn on the coarse grid, the linearized finite element system is solved on the fine grid

On diameter two Cayley graphs Appl. Math. Comput. (IF 4.397) Pub Date : 20220726
Wei Jin, Li TanLet X be a Cayley graph whose diameter is 2. Set R:=Aut(X) and w∈V(X). In this paper, it is shown that: for every positive integer m at least 6, there is a such Cayley graph X of m points such that Rw acts transitively in X2(w) but not in X(w); for every positive integer k at least 3, there is a such graph X of valency k such that Rw is transitive in X2(w) but not in X(w).

Uniform asymptotic estimates in a timedependent risk model with general investment returns and multivariate regularly varying claims Appl. Math. Comput. (IF 4.397) Pub Date : 20220727
Ming Cheng, Dimitrios G. Konstantinides, Dingcheng WangConsider an insurer with d lines of business and the freedom to make riskfree and risky investments. The investment portfolio price process is described as a general càdlàg process. It is assumed that the claim sizes from different lines of business and their common interarrival times form a sequence of independent and identically distributed (i.i.d.) random pairs, each pair obeying a particular

Note on the effect of graddiv stabilization on calculating drag and lift coefficients Appl. Math. Comput. (IF 4.397) Pub Date : 20220727
Yasasya Batugedara, Kyle J. SchwiebertIn recent years, graddiv stabilization has become a popular technique for improving the mass conservation of a solution to the incompressible NavierStokes equations (NSE). Graddiv stabilization can be easily implemented in any code that already uses the very common TaylorHood finite elements. In this paper we do a close review of the graddiv stabilized and modular graddiv stabilized NSE applied

Global MittagLeffler synchronization of discretetime fractionalorder neural networks with time delays Appl. Math. Comput. (IF 4.397) Pub Date : 20220725
XiaoLi Zhang, HongLi Li, Yonggui Kao, Long Zhang, Haijun JiangIn this article, the problem of the global MittagLeffler synchronization is proposed for a sort of discretetime fractionalorder neural networks (DFNNs) with delays. In the first place, a flesh power law inequality pertaining to fractional difference is constructed by means of integration by parts, Young inequality, and some properties about fractionalorder difference. In addition, based on aforesaid

A new mixed BoltzmannBGK model for mixtures solved with an IMEX finite volume scheme on unstructured meshes Appl. Math. Comput. (IF 4.397) Pub Date : 20220725
Marzia Bisi, Walter Boscheri, Giacomo Dimarco, Maria Groppi, Giorgio MartalòIn this work, we consider a novel model for a binary mixture of inert gases. The model, which preserves the structure of the original Boltzmann equations, combines integrodifferential collision operators with BGK relaxation terms in each kinetic equation: the first involving only collisions among particles of the same species, while the second ones taking into account the inter–species interactions

Dynamical and chaotic behaviors of natural convection flow in semiannular cylindrical domains using energyconserving loworder spectral models Appl. Math. Comput. (IF 4.397) Pub Date : 20220725
Amin KhodakaramTafti, Homayoun Emdad, Mojtaba MahzoonThis paper presents a comprehensive theoretical study on the dynamical behavior of natural convection flow in the confined region between horizontal halfcylinders. For this purpose, a loworder spectral model with three modes will produce for the fluid flow system using the Galerkin technique. It proved that the generated model is physically meaningful, as it conserves energy in the dissipationless

Timeinconsistent lifecycle consumption and retirement choice with mortality risk Appl. Math. Comput. (IF 4.397) Pub Date : 20220723
Shangzhen Luo, Mingming Wang, Wei ZhuIn this paper, we propose a general model to study lifecycle consumption and retirement choice of individuals with mortality risk and various forms of discounting preference. By solving the EulerLagrange equations, we obtain the optimal consumption strategy explicitly and provide an equation to solve for optimal retirement age. Two intuitive budget constraints are established to demonstrate the effects

The maximum outdegree power of complete kpartite oriented graphs Appl. Math. Comput. (IF 4.397) Pub Date : 20220723
Chentao Xu, Zhe You, Liwen Zhang, Minghong ZhouSuppose that Gσ is an oriented graph with order n and orientation σ. For d1+≥d2+≥⋯≥dn+, the outdegree sequence of Gσ is denoted by (d1+,d2+,…,dn+). Similar to the definition of the degree power for a simple graph, define the outdegree power for an oriented graph Gσ by ∂q+(Gσ)=∑i=1n(di+)q where q is a positive integer. Obviously, ∂1+(Gσ)=E(G). Denote by G(G) the set of oriented graphs whose underlying

A universal error transformation strategy for distributed eventtriggered formation tracking of purefeedback nonlinear multiagent systems with communication and avoidance ranges Appl. Math. Comput. (IF 4.397) Pub Date : 20220723
Sung Jin Yoo, Bong Seok ParkA universal error transformation method is proposed for designing a distributed eventtriggered formation tracker with preserved network connectivity and collision avoidance for multiple purefeedback nonlinear multiagent systems connected in a directed network. It is assumed that the communication and avoidance ranges of agents are heterogeneous and that all nonaffine nonlinear functions are unknown

Guaranteed and highprecision evaluation of the Lambert W function Appl. Math. Comput. (IF 4.397) Pub Date : 20220723
Lajos LócziSolutions to a wide variety of transcendental equations can be expressed in terms of the Lambert W function. The W function, also occurring frequently in many branches of science, is a nonelementary but now standard mathematical function implemented in all major technical computing systems. In this work, we analyze an efficient logarithmic recursion with quadratic convergence rate to approximate its

Extinction, persistence and density function analysis of a stochastic twostrain disease model with drug resistance mutation Appl. Math. Comput. (IF 4.397) Pub Date : 20220723
Yue LiuDrug resistance is a global health and development threat. However, its effect of emergence on disease dynamics is still poorly understood. In this paper, we develop a novel stochastic epidemic model where drugsensitive and drugresistant infected groups interact through the mutation. Firstly, we propose and prove the existence and uniqueness of the global positive solution. Then sufficient conditions

The high relative accuracy of the HZ method Appl. Math. Comput. (IF 4.397) Pub Date : 20220723
Josip Matejaš, Vjeran HariThe high relative accuracy of the Hari–Zimmermann method for solving the generalized eigenvalue problem Ax=λBx has been proved for a set of wellbehaved pairs of real symmetric positive definite matrices. These are pairs of matrices (A,B) such that the spectral conditions κ2(AS) and κ2(BS) are small, where AS=DA−1/2ADA−1/2, BS=DB−1/2BDB−1/2 and DA=diag(A), DB=diag(B). The proof is made for one step

Two disjoint cycles of various lengths in alternating group graph Appl. Math. Comput. (IF 4.397) Pub Date : 20220722
Dongqin ChengAlternating group graph has been widely studied recent years because it possesses many good properties. For a graph G, the twodisjointcyclecover [r1,r2]pancyclicity refers that it contains cycles C1 and C2, where V(C1)∩V(C2)=∅, ℓ(C1)+ℓ(C2)=V(G) and r1≤ℓ(C1)≤r2. In this paper, it is proved that the ndimensional alternating group graph AGn is twodisjointcyclecover [3,n!4]pancyclic, where n≥4

The impact of social resource allocation on epidemic transmission in complex networks Appl. Math. Comput. (IF 4.397) Pub Date : 20220722
Ningbo Zhang, Qiwen Yang, Xuzhen ZhuThis paper focuses on the social biological communication process on doublelayer complex networks. We propose a virus resource asymmetric coupling propagation model to simulate the propagation process of virus affected by recovered resources, and use a generalized discrete Markov chain method to describe the propagation dynamics. This paper mainly considers the effects of initial seed fraction, network

Nonlinear observer of the nonspatial dynamics of anthracnose: Case study of coffee berry disease Appl. Math. Comput. (IF 4.397) Pub Date : 20220722
David Jaures FotsaMbogne, Duplex Elvis HoupaDanga, David BekolleIn this paper, an observer for the dynamics of anthracnose disease is proposed based on a nonspatial model provided by the literature. The model is first improved in order to be more realistic. Indeed, conditions on parameters are weakened and therefore applicable to more concrete cases. There are also changes in the equations modeling the dynamics of the berry volume (v) and the rot volume (vr).

Exponential consensus of stochastic discrete multiagent systems under DoS attacks via periodically intermittent control: An impulsive framework Appl. Math. Comput. (IF 4.397) Pub Date : 20220721
Jiawei Zhuang, Shiguo Peng, Yonghua WangThis article is devoted to investigating the exponential leaderfollowing consensus (ELFC) of stochastic discrete multiagent systems (SDMASs) in the presence of parameter uncertainties, nonlinearities, stochastic disturbances and denialofservice (DoS) attacks. A novel control strategy, namely, periodically intermittent impulsive control (PIIC), is designed to cut down unnecessary communication costs

About the convergence of a family of initial boundary value problems for a fractional diffusion equation of robin type Appl. Math. Comput. (IF 4.397) Pub Date : 20220721
Isolda E. Cardoso, Sabrina D. Roscani, Domingo A. Tarzia 
Hyperbolic relaxation models for thin films down an inclined plane Appl. Math. Comput. (IF 4.397) Pub Date : 20220720
Firas Dhaouadi, Sergey Gavrilyuk, JeanPaul VilaWe present a family of relaxation models for thin films flows where both viscosity and surface tension effects are inherent. In a first step, a firstorder hyperbolic approximation to the dissipationless part of the system is presented. The method is based on an augmented Lagrangian approach, where a classical penalty method is used and highorder derivatives in the Lagrangian are promoted to new independent

Modelfree finitehorizon optimal tracking control of discretetime linear systems Appl. Math. Comput. (IF 4.397) Pub Date : 20220720
Wei Wang, Xiangpeng Xie, Changyang FengConventionally, the finitehorizon linear quadratic tracking (FHLQT) problem relies on solving the timevarying Riccati equations and the timevarying noncausal difference equations as the system dynamics is known. In this paper, with unknown system dynamics being considered, a Qfunctionbased modelfree method is developed to solve the FHLQT problem. First, an augmented system consisting of the

TVDMOOD schemes based on implicitexplicit time integration Appl. Math. Comput. (IF 4.397) Pub Date : 20220719
Victor MichelDansac, Andrea ThomannThe context of this work is the development of first order total variation diminishing (TVD) implicitexplicit (IMEX) RungeKutta (RK) schemes as a basis of a Multidimensional Optimal Order detection (MOOD) approach to approximate the solution of hyperbolic multiscale equations. A key feature of our newly proposed TVD schemes is that the resulting CFL condition does not depend on the fast waves of

Reliable computation of the eigenvalues of the discrete KdV spectrum Appl. Math. Comput. (IF 4.397) Pub Date : 20220715
Peter J. Prins, Sander Wahls 
Distributed DETMsbased internal collision avoidance control for UAV formation with lumped disturbances Appl. Math. Comput. (IF 4.397) Pub Date : 20220718
Lili Wei, Mou ChenThis work focuses on the internal collision avoidance control for unmanned aerial vehicle (UAV) formation based on distributed dynamic eventtriggered mechanisms (DETMs) and composite disturbance observers. To decrease the transmission rate of the redundant data and alleviate the communication network burden, a method of designing distributed eventtriggered mechanisms with dynamic triggering threshold

Moment estimation for parameters in highorder uncertain differential equations Appl. Math. Comput. (IF 4.397) Pub Date : 20220716
Zhe Liu, Ying YangAs a type of differential equations with highorder derivatives of uncertain processes, highorder uncertain differential equations are widely applied to modelling dynamic systems in uncertain environment, which usually involve unknown parameters to be estimated. Since observations are always discrete in practice, based on these discrete observations of solution processes, we propose moment estimations

Vertexdegreebased topological indices of oriented trees Appl. Math. Comput. (IF 4.397) Pub Date : 20220716
Sergio Bermudo, Roberto Cruz, Juan RadaLet D be a digraph with arc set A(D). A vertexdegreebased topological index φ is defined in D asφ(D)=12∑uv∈A(D)φdu+,dv−,where du+ is the outdegree of vertex u, dv− is the indegree of vertex v, and φx,y is a (symmetric) function. We study in this paper the extremal value problem of a VDB topological index φ over the set of orientations of a tree T. We show that one extreme value is attained in sinksource

Novel results on partial hosoya polynomials: An application in chemistry Appl. Math. Comput. (IF 4.397) Pub Date : 20220718
Modjtaba Ghorbani, Mardjan HakimiNezhaad, Matthias DehmerThis article deal with an investigation of certain properties of partial Hosoya polynomial and then computing this new polynomial for some family of wellknown graphs. Also, we verify some results concerning the zeros location of this polynomial in a ring shaped region. In this way, we include not only new results as special cases, but also improve the results due to Dehmer et al. [12] as a particular

Multiple seasonal STL decomposition with discreteinterval moving seasonalities Appl. Math. Comput. (IF 4.397) Pub Date : 20220718
Oscar Trull, J. Carlos GarcíaDíaz, A. PeiróSignesThe decomposition of a time series into components is an exceptionally useful tool for understanding the behaviour of the series. The decomposition makes it possible to distinguish the longterm and the shortterm behaviour through the trend component and the seasonality component. Among the decomposition methods, the STL (Seasonal Trend decomposition based on Loess) method stands out for its versatility