Publisher: Vilnius University   (Total: 37 journals)   [Sort by number of followers]

Showing 1 - 37 of 37 Journals sorted alphabetically
Accounting Theory and Practice     Open Access   (Followers: 3)
Acta medica Lituanica     Open Access   (Followers: 1)
Acta Museologica Lithuanica     Open Access  
Acta Orientalia Vilnensia     Open Access   (Followers: 1)
Acta Paedagogica Vilnensia     Open Access   (Followers: 1)
Archaeologia Lituana     Open Access  
Baltistica     Open Access  
Bibliotheca Lituana     Open Access  
Criminological Studies     Open Access   (Followers: 2)
Informacijos mokslai     Open Access  
J.ism Research     Open Access   (Followers: 4)
Kalbotyra     Open Access  
Knygotyra (Book Science)     Open Access  
Lietuvių kalba     Open Access   (Followers: 1)
Lietuvos istorijos studijos     Open Access  
Lietuvos Matematikos Rinkinys     Open Access   (Followers: 3)
Lietuvos Statistikos Darbai     Open Access   (Followers: 4)
Literatūra     Open Access  
Lithuanian Surgery : Lietuvos Chirurgija     Open Access  
Nonlinear Analysis : Modelling and Control     Open Access   (Followers: 1)
Organizations and Markets in Emerging Economies     Open Access   (Followers: 4)
Politologija     Open Access  
Problemos     Open Access  
Psychology     Open Access  
Religija ir kultūra     Open Access   (Followers: 6)
Respectus Philologicus     Open Access  
Scandinavistica Vilnensis     Open Access   (Followers: 5)
Semiotika     Open Access   (Followers: 3)
Slavistica Vilnensis     Open Access   (Followers: 1)
Socialinė teorija, empirija, politika ir praktika     Open Access  
Sociology : Thought and Action     Open Access  
Taikomoji kalbotyra     Open Access   (Followers: 1)
Teisė : Law     Open Access  
Verbum     Open Access  
Vertimo studijos (Translation Studies)     Open Access  
Vilnius University Open Series     Open Access   (Followers: 2)
Vilnius University Proceedings     Open Access   (Followers: 4)
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Nonlinear Analysis : Modelling and Control
Number of Followers: 1  

  This is an Open Access Journal Open Access journal
ISSN (Print) 1392-5113 - ISSN (Online) 2335-8963
Published by Vilnius University Homepage  [37 journals]
  • Eventually periodic solutions of single neuron model

    • Authors: Inese Bula Michael A. Radin
      Abstract: In this paper, we consider a nonautonomous piecewise linear difference equation that describes a discrete version of a single neuron model with a periodic (period two and period three) internal decay rate. We investigated the periodic behavior of solutions relative to the periodic internal decay rate in our previous papers. Our goal is to prove that this model contains a large quantity of initial conditions that generate eventually periodic solutions. We will show that only periodic solutions and eventually periodic solutions exist in several cases.
      PubDate: Sun, 01 Nov 2020 00:00:00 +000
       
  • Combating unemployment through skill development

    • Authors: Arvind Kumar Singh Pushkar Kumar Singh Arvind Kumar Misra
      Abstract: In this paper, we propose and analyze a nonlinear mathematical model to study the effect of skill development on unemployment. We assume that government promulgates different levels of skill development programs for unemployed persons through which two different categories of skilled persons, namely, the low-skilled and the highly-skilled persons, are coming out and the highly-skilled persons are able to create vacancies. The model is studied using stability theory of nonlinear differential equations. We find analytically that there exists a unique positive equilibrium point of the proposed model system under some conditions. Also, the resulting equilibrium is locally as well as globally stable under certain conditions. The effective use of implemented policies to control unemployment by providing skills to unemployed persons and the new vacancies created by highly-skilled persons are identified by using optimal control analysis. Finally, numerical simulation is carried out to support analytical findings.
      PubDate: Sun, 01 Nov 2020 00:00:00 +000
       
  • Impact of social influence in English proficiency and performance in
           English examinations of mathematics students from a Sino-US undergraduate
           education program

    • Authors: Hong Zhang Wilson Osafo Apeanti Liqiong Ma Dianchen Lu Xizhong Zheng Paul Georgescu
      Abstract: This study examines the influence of certain academic and demographic variables upon the academic performance of Chinese students enrolled in a cooperative Bachelor’s degree program in Pure and Applied Mathematics. The program is English taught and jointly organised by Jiangsu University, China and Arcadia University, USA. Data from a sample of 166 students is processed using inferential and path analysis, as well as mathematical modelling. As evidenced by the inferential and path analysis, no steady improvement in the English proficiency of students has been observed, while the latter has been found to be influenced by gender and to strongly influence academic performance in Mathematics courses. The effects of negative social influences are assessed via a qualitative analysis of the mathematical model. Threshold quantities similar to the basic reproduction number of mathematical epidemiology have been found to be stability triggers. Possible interventional measures are discussed based on these findings.
      PubDate: Sun, 01 Nov 2020 00:00:00 +000
       
  • A switching control for finite-time synchronization of memristor-based BAM
           neural networks with stochastic disturbances

    • Authors: Liangchen Li Rui Xu Qintao Gan Jiazhe Lin
      Abstract: This paper deals with the finite-time stochastic synchronization for a class of memristorbased bidirectional associative memory neural networks (MBAMNNs) with time-varying delays and stochastic disturbances. Firstly, based on the physical property of memristor and the circuit of MBAMNNs, a MBAMNNs model with more reasonable switching conditions is established. Then, based on the theory of Filippov’s solution, by using Lyapunov–Krasovskii functionals and stochastic analysis technique, a sufficient condition is given to ensure the finite-time stochastic synchronization of MBAMNNs with a certain controller. Next, by a further discussion, an errordependent switching controller is given to shorten the stochastic settling time. Finally, numerical simulations are carried out to illustrate the effectiveness of theoretical results.
      PubDate: Sun, 01 Nov 2020 00:00:00 +000
       
  • Finite-time stochastic input-to-state stability and observer-based
           controller design for singular nonlinear systems

    • Authors: Feng Zhao Xiangyong Chen Jinde Cao Ming Guo Jianlong Qiu
      Abstract: This paper investigated observer-based controller for a class of singular nonlinear systems with state and exogenous disturbance-dependent noise. A new sufficient condition for finite-time stochastic input-to-state stability (FTSISS) of stochastic nonlinear systems is developed. Based on the sufficient condition, a sufficient condition on impulse-free and FTSISS for corresponding closed-loop error systems is provided. A linear matrix inequality condition, which can calculate the gains of the observer and state-feedback controller, is developed. Finally, two simulation examples are employed to demonstrate the effectiveness of the proposed approaches.
      PubDate: Sun, 01 Nov 2020 00:00:00 +000
       
  • Weak solvability of the unconditionally stable difference scheme for the
           coupled sine-Gordon system

    • Authors: Ozgur Yildirim Meltem Uzun
      Abstract: In this paper, we study the existence and uniqueness of weak solution for the system of finite difference schemes for coupled sine-Gordon equations. A novel first order of accuracy unconditionally stable difference scheme is considered. The variational method also known as the energy method is applied to prove unique weak solvability.We also present a new unified numerical method for the approximate solution of this problem by combining the difference scheme and the fixed point iteration. A test problem is considered, and results of numerical experiments are presented with error analysis to verify the accuracy of the proposed numerical method.
      PubDate: Sun, 01 Nov 2020 00:00:00 +000
       
  • Some remarks on bv(s)-metric spaces and fixed point results with an
           application

    • Authors: Hiranmoy Garai Lakshmi Kanta Dey Pratikshan Mondal Stojan Radenović
      Abstract: We compare the newly defined bv(s)-metric spaces with several other abstract spaces like metric spaces, b-metric spaces and show that some well-known results, which hold in the latter class of spaces, may not hold in bv(s)-metric spaces. Besides, we introduce the notions of sequential compactness and bounded compactness in the framework of bv(s)-metric spaces. Using these notions, we prove some fixed point results involving Nemytzki–Edelstein type mappings in this setting, from which several comparable fixed point results can be deduced. In addition to these, we find some existence and uniqueness criteria for the solution to a certain type of mixed Fredholm–Volterra integral equations.
      PubDate: Sun, 01 Nov 2020 00:00:00 +000
       
  • Analysis of a model for waterborne diseases with Allee effect on bacteria

    • Authors: Florinda Capone Maria Francesca Carfora Roberta De Luca Isabella Torcicollo
      Abstract: A limitation of current modeling studies in waterborne diseases (one of the leading causes of death worldwide) is that the intrinsic dynamics of the pathogens is poorly addressed, leading to incomplete, and often, inadequate understanding of the pathogen evolution and its impact on disease transmission and spread. To overcome these limitations, in this paper, we consider an ODEs model with bacterial growth inducing Allee effect. We adopt an adequate functional response to significantly express the shape of indirect transmission. The existence and stability of biologically meaningful equilibria is investigated through a detailed discussion of both backward and Hopf bifurcations. The sensitivity analysis of the basic reproduction number is performed. Numerical simulations confirming the obtained results in two different scenarios are shown.
      PubDate: Sun, 01 Nov 2020 00:00:00 +000
       
  • Estimation of the Hurst index of the solutions of fractional SDE with
           locally Lipschitz drift

    • Authors: Kęstutis Kubilius
      Abstract: Strongly consistent and asymptotically normal estimates of the Hurst index H are obtained for stochastic differential equations (SDEs) that have a unique positive solution. A strongly convergent approximation of the considered SDE solution is constructed using the backward Euler scheme. Moreover, it is proved that the Hurst estimator preserves its properties, if we replace the solution with its approximation.
      PubDate: Sun, 01 Nov 2020 00:00:00 +000
       
  • Fractional integrals, derivatives and integral equations with weighted
           Takagi–Landsberg functions

    • Authors: Vitalii Makogin Yuliya Mishura
      Abstract: In this paper, we find fractional Riemann–Liouville derivatives for the Takagi–Landsberg functions. Moreover, we introduce their generalizations called weighted Takagi–Landsberg functions, which have arbitrary bounded coefficients in the expansion under Schauder basis. The class of weighted Takagi–Landsberg functions of order H > 0 on [0; 1] coincides with the class of H-Hölder continuous functions on [0; 1]. Based on computed fractional integrals and derivatives of the Haar and Schauder functions, we get a new series representation of the fractional derivatives of a Hölder continuous function. This result allows us to get a new formula of a Riemann–Stieltjes integral. The application of such series representation is a new method of numerical solution of the Volterra and linear integral equations driven by a Hölder continuous function.
      PubDate: Sun, 01 Nov 2020 00:00:00 +000
       
 
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