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COMPUTER SCIENCE (1196 journals)                  1 2 3 4 5 6 | Last

Showing 1 - 200 of 872 Journals sorted alphabetically
3D Printing and Additive Manufacturing     Full-text available via subscription   (Followers: 20)
Abakós     Open Access   (Followers: 4)
ACM Computing Surveys     Hybrid Journal   (Followers: 22)
ACM Journal on Computing and Cultural Heritage     Hybrid Journal   (Followers: 8)
ACM Journal on Emerging Technologies in Computing Systems     Hybrid Journal   (Followers: 11)
ACM Transactions on Accessible Computing (TACCESS)     Hybrid Journal   (Followers: 3)
ACM Transactions on Algorithms (TALG)     Hybrid Journal   (Followers: 15)
ACM Transactions on Applied Perception (TAP)     Hybrid Journal   (Followers: 5)
ACM Transactions on Architecture and Code Optimization (TACO)     Hybrid Journal   (Followers: 9)
ACM Transactions on Autonomous and Adaptive Systems (TAAS)     Hybrid Journal   (Followers: 7)
ACM Transactions on Computation Theory (TOCT)     Hybrid Journal   (Followers: 12)
ACM Transactions on Computational Logic (TOCL)     Hybrid Journal   (Followers: 3)
ACM Transactions on Computer Systems (TOCS)     Hybrid Journal   (Followers: 17)
ACM Transactions on Computer-Human Interaction     Hybrid Journal   (Followers: 14)
ACM Transactions on Computing Education (TOCE)     Hybrid Journal   (Followers: 5)
ACM Transactions on Design Automation of Electronic Systems (TODAES)     Hybrid Journal   (Followers: 3)
ACM Transactions on Economics and Computation     Hybrid Journal  
ACM Transactions on Embedded Computing Systems (TECS)     Hybrid Journal   (Followers: 3)
ACM Transactions on Information Systems (TOIS)     Hybrid Journal   (Followers: 19)
ACM Transactions on Intelligent Systems and Technology (TIST)     Hybrid Journal   (Followers: 7)
ACM Transactions on Interactive Intelligent Systems (TiiS)     Hybrid Journal   (Followers: 3)
ACM Transactions on Multimedia Computing, Communications, and Applications (TOMCCAP)     Hybrid Journal   (Followers: 9)
ACM Transactions on Reconfigurable Technology and Systems (TRETS)     Hybrid Journal   (Followers: 6)
ACM Transactions on Sensor Networks (TOSN)     Hybrid Journal   (Followers: 7)
ACM Transactions on Speech and Language Processing (TSLP)     Hybrid Journal   (Followers: 8)
ACM Transactions on Storage     Hybrid Journal  
ACS Applied Materials & Interfaces     Full-text available via subscription   (Followers: 27)
Acta Automatica Sinica     Full-text available via subscription   (Followers: 2)
Acta Universitatis Cibiniensis. Technical Series     Open Access  
Ad Hoc Networks     Hybrid Journal   (Followers: 11)
Adaptive Behavior     Hybrid Journal   (Followers: 11)
Advanced Engineering Materials     Hybrid Journal   (Followers: 28)
Advanced Science Letters     Full-text available via subscription   (Followers: 9)
Advances in Adaptive Data Analysis     Hybrid Journal   (Followers: 7)
Advances in Artificial Intelligence     Open Access   (Followers: 15)
Advances in Calculus of Variations     Hybrid Journal   (Followers: 2)
Advances in Catalysis     Full-text available via subscription   (Followers: 5)
Advances in Computational Mathematics     Hybrid Journal   (Followers: 18)
Advances in Computer Science : an International Journal     Open Access   (Followers: 15)
Advances in Computing     Open Access   (Followers: 2)
Advances in Data Analysis and Classification     Hybrid Journal   (Followers: 52)
Advances in Engineering Software     Hybrid Journal   (Followers: 27)
Advances in Geosciences (ADGEO)     Open Access   (Followers: 13)
Advances in Human Factors/Ergonomics     Full-text available via subscription   (Followers: 23)
Advances in Human-Computer Interaction     Open Access   (Followers: 19)
Advances in Materials Sciences     Open Access   (Followers: 14)
Advances in Operations Research     Open Access   (Followers: 12)
Advances in Parallel Computing     Full-text available via subscription   (Followers: 6)
Advances in Porous Media     Full-text available via subscription   (Followers: 5)
Advances in Remote Sensing     Open Access   (Followers: 43)
Advances in Science and Research (ASR)     Open Access   (Followers: 4)
Advances in Technology Innovation     Open Access   (Followers: 5)
AEU - International Journal of Electronics and Communications     Hybrid Journal   (Followers: 8)
African Journal of Information and Communication     Open Access   (Followers: 6)
African Journal of Mathematics and Computer Science Research     Open Access   (Followers: 4)
AI EDAM     Hybrid Journal  
Air, Soil & Water Research     Open Access   (Followers: 11)
AIS Transactions on Human-Computer Interaction     Open Access   (Followers: 5)
Algebras and Representation Theory     Hybrid Journal   (Followers: 1)
Algorithms     Open Access   (Followers: 11)
American Journal of Computational and Applied Mathematics     Open Access   (Followers: 5)
American Journal of Computational Mathematics     Open Access   (Followers: 4)
American Journal of Information Systems     Open Access   (Followers: 5)
American Journal of Sensor Technology     Open Access   (Followers: 4)
Anais da Academia Brasileira de Ciências     Open Access   (Followers: 2)
Analog Integrated Circuits and Signal Processing     Hybrid Journal   (Followers: 7)
Analysis in Theory and Applications     Hybrid Journal   (Followers: 1)
Animation Practice, Process & Production     Hybrid Journal   (Followers: 5)
Annals of Combinatorics     Hybrid Journal   (Followers: 3)
Annals of Data Science     Hybrid Journal   (Followers: 11)
Annals of Mathematics and Artificial Intelligence     Hybrid Journal   (Followers: 12)
Annals of Pure and Applied Logic     Open Access   (Followers: 2)
Annals of Software Engineering     Hybrid Journal   (Followers: 13)
Annual Reviews in Control     Hybrid Journal   (Followers: 6)
Anuario Americanista Europeo     Open Access  
Applicable Algebra in Engineering, Communication and Computing     Hybrid Journal   (Followers: 2)
Applied and Computational Harmonic Analysis     Full-text available via subscription   (Followers: 1)
Applied Artificial Intelligence: An International Journal     Hybrid Journal   (Followers: 13)
Applied Categorical Structures     Hybrid Journal   (Followers: 2)
Applied Clinical Informatics     Hybrid Journal   (Followers: 2)
Applied Computational Intelligence and Soft Computing     Open Access   (Followers: 11)
Applied Computer Systems     Open Access   (Followers: 2)
Applied Informatics     Open Access  
Applied Mathematics and Computation     Hybrid Journal   (Followers: 33)
Applied Medical Informatics     Open Access   (Followers: 10)
Applied Numerical Mathematics     Hybrid Journal   (Followers: 5)
Applied Soft Computing     Hybrid Journal   (Followers: 16)
Applied Spatial Analysis and Policy     Hybrid Journal   (Followers: 4)
Applied System Innovation     Open Access  
Architectural Theory Review     Hybrid Journal   (Followers: 3)
Archive of Applied Mechanics     Hybrid Journal   (Followers: 5)
Archive of Numerical Software     Open Access  
Archives and Museum Informatics     Hybrid Journal   (Followers: 130)
Archives of Computational Methods in Engineering     Hybrid Journal   (Followers: 5)
arq: Architectural Research Quarterly     Hybrid Journal   (Followers: 7)
Artifact     Hybrid Journal   (Followers: 2)
Artificial Life     Hybrid Journal   (Followers: 7)
Asia Pacific Journal on Computational Engineering     Open Access  
Asia-Pacific Journal of Information Technology and Multimedia     Open Access   (Followers: 1)
Asian Journal of Computer Science and Information Technology     Open Access  
Asian Journal of Control     Hybrid Journal  
Assembly Automation     Hybrid Journal   (Followers: 2)
at - Automatisierungstechnik     Hybrid Journal   (Followers: 1)
Australian Educational Computing     Open Access   (Followers: 1)
Automatic Control and Computer Sciences     Hybrid Journal   (Followers: 4)
Automatic Documentation and Mathematical Linguistics     Hybrid Journal   (Followers: 5)
Automatica     Hybrid Journal   (Followers: 11)
Automation in Construction     Hybrid Journal   (Followers: 6)
Autonomous Mental Development, IEEE Transactions on     Hybrid Journal   (Followers: 9)
Basin Research     Hybrid Journal   (Followers: 5)
Behaviour & Information Technology     Hybrid Journal   (Followers: 52)
Big Data and Cognitive Computing     Open Access   (Followers: 2)
Biodiversity Information Science and Standards     Open Access  
Bioinformatics     Hybrid Journal   (Followers: 284)
Biomedical Engineering     Hybrid Journal   (Followers: 15)
Biomedical Engineering and Computational Biology     Open Access   (Followers: 13)
Biomedical Engineering, IEEE Reviews in     Full-text available via subscription   (Followers: 19)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 35)
Briefings in Bioinformatics     Hybrid Journal   (Followers: 43)
British Journal of Educational Technology     Hybrid Journal   (Followers: 141)
Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 10)
c't Magazin fuer Computertechnik     Full-text available via subscription   (Followers: 1)
CALCOLO     Hybrid Journal  
Calphad     Hybrid Journal  
Canadian Journal of Electrical and Computer Engineering     Full-text available via subscription   (Followers: 14)
Capturing Intelligence     Full-text available via subscription  
Catalysis in Industry     Hybrid Journal   (Followers: 1)
CEAS Space Journal     Hybrid Journal   (Followers: 2)
Cell Communication and Signaling     Open Access   (Followers: 2)
Central European Journal of Computer Science     Hybrid Journal   (Followers: 5)
CERN IdeaSquare Journal of Experimental Innovation     Open Access   (Followers: 2)
Chaos, Solitons & Fractals     Hybrid Journal   (Followers: 3)
Chemometrics and Intelligent Laboratory Systems     Hybrid Journal   (Followers: 14)
ChemSusChem     Hybrid Journal   (Followers: 7)
China Communications     Full-text available via subscription   (Followers: 7)
Chinese Journal of Catalysis     Full-text available via subscription   (Followers: 2)
CIN Computers Informatics Nursing     Full-text available via subscription   (Followers: 11)
Circuits and Systems     Open Access   (Followers: 15)
Clean Air Journal     Full-text available via subscription   (Followers: 1)
CLEI Electronic Journal     Open Access  
Clin-Alert     Hybrid Journal   (Followers: 1)
Cluster Computing     Hybrid Journal   (Followers: 1)
Cognitive Computation     Hybrid Journal   (Followers: 4)
COMBINATORICA     Hybrid Journal  
Combinatorics, Probability and Computing     Hybrid Journal   (Followers: 4)
Combustion Theory and Modelling     Hybrid Journal   (Followers: 14)
Communication Methods and Measures     Hybrid Journal   (Followers: 12)
Communication Theory     Hybrid Journal   (Followers: 20)
Communications Engineer     Hybrid Journal   (Followers: 1)
Communications in Algebra     Hybrid Journal   (Followers: 3)
Communications in Computational Physics     Full-text available via subscription   (Followers: 2)
Communications in Partial Differential Equations     Hybrid Journal   (Followers: 3)
Communications of the ACM     Full-text available via subscription   (Followers: 52)
Communications of the Association for Information Systems     Open Access   (Followers: 16)
COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering     Hybrid Journal   (Followers: 3)
Complex & Intelligent Systems     Open Access   (Followers: 1)
Complex Adaptive Systems Modeling     Open Access  
Complex Analysis and Operator Theory     Hybrid Journal   (Followers: 2)
Complexity     Hybrid Journal   (Followers: 6)
Complexus     Full-text available via subscription  
Composite Materials Series     Full-text available via subscription   (Followers: 8)
Computación y Sistemas     Open Access  
Computation     Open Access  
Computational and Applied Mathematics     Hybrid Journal   (Followers: 2)
Computational and Mathematical Methods in Medicine     Open Access   (Followers: 2)
Computational and Mathematical Organization Theory     Hybrid Journal   (Followers: 2)
Computational and Structural Biotechnology Journal     Open Access   (Followers: 2)
Computational and Theoretical Chemistry     Hybrid Journal   (Followers: 9)
Computational Astrophysics and Cosmology     Open Access   (Followers: 1)
Computational Biology and Chemistry     Hybrid Journal   (Followers: 11)
Computational Chemistry     Open Access   (Followers: 2)
Computational Cognitive Science     Open Access   (Followers: 2)
Computational Complexity     Hybrid Journal   (Followers: 4)
Computational Condensed Matter     Open Access  
Computational Ecology and Software     Open Access   (Followers: 9)
Computational Economics     Hybrid Journal   (Followers: 9)
Computational Geosciences     Hybrid Journal   (Followers: 15)
Computational Linguistics     Open Access   (Followers: 23)
Computational Management Science     Hybrid Journal  
Computational Mathematics and Modeling     Hybrid Journal   (Followers: 8)
Computational Mechanics     Hybrid Journal   (Followers: 5)
Computational Methods and Function Theory     Hybrid Journal  
Computational Molecular Bioscience     Open Access   (Followers: 2)
Computational Optimization and Applications     Hybrid Journal   (Followers: 7)
Computational Particle Mechanics     Hybrid Journal   (Followers: 1)
Computational Research     Open Access   (Followers: 1)
Computational Science and Discovery     Full-text available via subscription   (Followers: 2)
Computational Science and Techniques     Open Access  
Computational Statistics     Hybrid Journal   (Followers: 14)
Computational Statistics & Data Analysis     Hybrid Journal   (Followers: 30)
Computer     Full-text available via subscription   (Followers: 94)
Computer Aided Surgery     Hybrid Journal   (Followers: 6)
Computer Applications in Engineering Education     Hybrid Journal   (Followers: 8)
Computer Communications     Hybrid Journal   (Followers: 10)
Computer Engineering and Applications Journal     Open Access   (Followers: 5)
Computer Journal     Hybrid Journal   (Followers: 9)
Computer Methods in Applied Mechanics and Engineering     Hybrid Journal   (Followers: 23)
Computer Methods in Biomechanics and Biomedical Engineering     Hybrid Journal   (Followers: 12)
Computer Methods in the Geosciences     Full-text available via subscription   (Followers: 2)
Computer Music Journal     Hybrid Journal   (Followers: 19)

        1 2 3 4 5 6 | Last

Journal Cover Chaos, Solitons & Fractals
  [SJR: 0.679]   [H-I: 110]   [3 followers]  Follow
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 0960-0779
   Published by Elsevier Homepage  [3175 journals]
  • Dynamical analysis of a fractional-order Rosenzweig–MacArthur model
           incorporating a prey refuge
    • Authors: Mahmoud Moustafa; Mohd Hafiz Mohd; Ahmad Izani Ismail; Farah Aini Abdullah
      Pages: 1 - 13
      Abstract: Publication date: April 2018
      Source:Chaos, Solitons & Fractals, Volume 109
      Author(s): Mahmoud Moustafa, Mohd Hafiz Mohd, Ahmad Izani Ismail, Farah Aini Abdullah
      This paper considers a fractional order Rosenzweig-MacArthur (R-M) model incorporating a prey refuge. The model is constructed and analyzed in detail. The existence, uniqueness, non-negativity and boundedness of the solutions as well as the local and global asymptotic stability of the equilibrium points are studied. Sufficient conditions for the stability and the occurrence of Hopf bifurcation for the fractional order R-M model are demonstrated. The resolution of the paradox of enrichment is investigated. The impact of fractional order and the prey refuge effects on the stability of the system are also studied both theoretically and by using numerical simulations.

      PubDate: 2018-02-26T12:40:12Z
      DOI: 10.1016/j.chaos.2018.02.008
      Issue No: Vol. 109 (2018)
  • Chaotic dynamics and stability of functionally graded material doubly
           curved shallow shells
    • Authors: H. Ramezannejad Azarboni; R. Ansari; A. Nazarinezhad
      Pages: 14 - 25
      Abstract: Publication date: April 2018
      Source:Chaos, Solitons & Fractals, Volume 109
      Author(s): H. Ramezannejad Azarboni, R. Ansari, A. Nazarinezhad
      In this article, the nonlinear chaotic and periodic dynamic responses of doubly curved functionally graded shallow shells subjected to harmonic external excitation are numerically investigated. Material characteristics of the shell are defined according to a simple power law distribution through the thickness. Based on the first-order shear deformation shell theory and using the Donnell nonlinear kinematic relations the set of the governing equations are derived. The Galerkin method together with trigonometric mode shape functions is applied to solve the equations of motion. Also, the nonlinearly coupled time integration of the governing equation of plate is solved employing fourth-order Runge–Kutta method. The effects of amplitude and frequency of external force on the nonlinear dynamic response of shells are investigated. The bifurcation diagram and largest Lyapunov exponent are employed to detect the amplitude and frequency of external force critical parameter of periodic and chaotic response of shallow shells under periodic force. Having known the critical values, phase portrait, Poincare maps, time history and power spectrum are presented to observe the periodic and chaotic behavior of the system.

      PubDate: 2018-02-26T12:40:12Z
      DOI: 10.1016/j.chaos.2018.02.011
      Issue No: Vol. 109 (2018)
  • The dynamics of online ratings with heterogeneous preferences in online
           review platform
    • Authors: Yuhan Zhang; Xin Feng; Ye Wu; Jinghua Xiao
      Pages: 26 - 30
      Abstract: Publication date: April 2018
      Source:Chaos, Solitons & Fractals, Volume 109
      Author(s): Yuhan Zhang, Xin Feng, Ye Wu, Jinghua Xiao
      Nowadays online consumer reviews (OCR) has increasingly received scholars' attention as an important form of word-of-mouth. Recent study shows that online reviews of a product, such as a book or a restaurant, have effect on long-term consuming behavior and the future rating of the product, it mainly reflects that the early high rating of a product will lead the decrease trend of rating over time. To confirm the existence of the effect and explore how it works, over 180,000 reviews on were collected to investigate the behavior patterns and intrinsic dynamics. In this paper, four temporal evolution patterns were observed via evaluating the cumulative average rating series for each restaurant. Moreover, a conceptual model considering the influence of heterogeneous preferences and the self-selection mechanism was introduced, and the numerical results coincided with the empirical analysis well enough to support the hypotheses. We find special preferences result in tendentious consumption and unrepresentative reviews, these reviews lead the potential consumers to over- or under-estimate the products and directly affect the subsequent ratings. The conclusions of this paper can contribute to the specific policies to adjust the initial rating effect for the specific marketing strategies.

      PubDate: 2018-02-26T12:40:12Z
      DOI: 10.1016/j.chaos.2018.02.003
      Issue No: Vol. 109 (2018)
  • A smooth-piecewise model to the Cord Attractor
    • Authors: Gleison F.V. Amaral; Erivelton G. Nepomuceno
      Pages: 31 - 35
      Abstract: Publication date: April 2018
      Source:Chaos, Solitons & Fractals, Volume 109
      Author(s): Gleison F.V. Amaral, Erivelton G. Nepomuceno
      This paper reports a smooth-piecewise model to the Cord Attractor. The fact that the Cord Attractor has one real fixed point and two complex conjugate fixed points does not allow to use a technique based on the building of two affine subsystems, which requires at least two real fixed points [Chaos 16, 013115 (2006)]. In this work, we have presented a procedure to at least partially overcome this limitation using a virtual fixed point; the location of the fixed point is based on the topology of the original system. The switching function has been designed as a smooth function. The phase space and the local-finite largest Lyapunov exponent have been used to compare the resulting attractor with the original Cord Attractor.

      PubDate: 2018-02-26T12:40:12Z
      DOI: 10.1016/j.chaos.2018.02.001
      Issue No: Vol. 109 (2018)
  • A novel method for reconstructing period with single input in NFSR
    • Authors: Bo Gao; Xuan Liu; Zhongzhou Lan; Rongrong Fu
      Pages: 36 - 40
      Abstract: Publication date: April 2018
      Source:Chaos, Solitons & Fractals, Volume 109
      Author(s): Bo Gao, Xuan Liu, Zhongzhou Lan, Rongrong Fu
      Non-Linear Feedback Shift Registers (NFSRs) are a generalization of Liner Feedback Shift Registers (LFSRs). The study of NFSR sequence helps to analyze the cryptographical security of NFSR-based stream cipher. Due to lack of efficient algebraic tools, the period of NFSR still remains an open crucial theoretical problem. In this paper, we view the NFSR as a Boolean network (BN), so that the study about the period of NFSR can be viewed as the study about period of BN. Furthermore, based on the mathematical tool of semi-tensor product (STP), a Boolean network can be mapped into an algebraic form. For these, we put forward a method for reconstructing the period of NFSR with single input. Especially, we propose a procedure to choose the controlled states and steer the controlled states from initial state to desirable one. At last, the general derivation is exemplified by numerical simulations for a kind of NFSR.

      PubDate: 2018-02-26T12:40:12Z
      DOI: 10.1016/j.chaos.2018.01.012
      Issue No: Vol. 109 (2018)
  • The evolution of cooperation in spatial multigame with voluntary
    • Authors: Zhenghong Deng; Yijie Huang; Zhiyang Gu; Zhilong Deng; Jiwei Xu
      Pages: 41 - 46
      Abstract: Publication date: April 2018
      Source:Chaos, Solitons & Fractals, Volume 109
      Author(s): Zhenghong Deng, Yijie Huang, Zhiyang Gu, Zhilong Deng, Jiwei Xu
      In the real life, we often simultaneously encounter various social dilemmas, which are also inclined to be voluntarily participated in, instead of previous assumption's compulsory participation in. Accounting on this realistic scenario, we have introduced the mechanism that the individuals have access to different payoff matrices corresponding to different social dilemmas to participate in the multigame with three strategies to choose, including cooperation, defection, going it alone. Furthermore, we set a proportion ψ/2 of the population to play the Prisoner's Dilemma, a proportion ψ/2 of the population to play Snowdrift and a proportion 1 − ψ of the population to play the weak Prisoner's Dilemma, which results in the fact that the mean payoff matrix returns to the basic weak PD. Though numerical simulations, we find that for the smaller temptation to defect, the cooperation can be enhanced by the diversity of the sucker's payoff in the multigame contrast to the basic case. In addition, when the contribution of sucker's payoff is larger or more players choose to play the Prisoner's Dilemma and Snowdrift, the cooperators become more dominated.

      PubDate: 2018-02-26T12:40:12Z
      DOI: 10.1016/j.chaos.2018.02.013
      Issue No: Vol. 109 (2018)
  • Synchronization analysis of fractional order drive-response networks with
           in-commensurate orders
    • Authors: Li-xin Yang; Jun Jiang
      Pages: 47 - 52
      Abstract: Publication date: April 2018
      Source:Chaos, Solitons & Fractals, Volume 109
      Author(s): Li-xin Yang, Jun Jiang
      This paper is devoted to synchronization analysis of the fractional order drive-response complex network. Firstly, a fractional order drive-response networks model with in-commensurate orders is proposed. Moreover, on the basis of the stability theory of linear fractional-order differential equations and open-loop strategy, we derive a sufficient condition for the stability of the modified projective synchronization behavior in such drive-response complex network. Furthermore, we verify our theoretical results by numerical simulations of drive-response complex network with in-commensurate orders.

      PubDate: 2018-02-26T12:40:12Z
      DOI: 10.1016/j.chaos.2018.02.014
      Issue No: Vol. 109 (2018)
  • On the control of unknown continuous time chaotic systems by applying
           Takens embedding theory
    • Authors: H. Kaveh; H. Salarieh; R. Hajiloo
      Pages: 53 - 57
      Abstract: Publication date: April 2018
      Source:Chaos, Solitons & Fractals, Volume 109
      Author(s): H. Kaveh, H. Salarieh, R. Hajiloo
      In this paper, a new approach to control continuous time chaotic systems with an unknown governing equation and limitation on the measurement of states, has been investigated. In many chaotic systems, disability to measure all of the states is a usual limitation, like in some economical, biological and many other engineering systems. Takens showed that a chaotic attractor has an astonishing feature in which it can embed to a mathematically similar attractor by using time series of one of the states. The new embedded attractor saves much information from the original attractor. This phenomenon has been deployed to present a new way to control continuous time chaotic systems, when only one of the states of the system is measurable and the system model is not also available.

      PubDate: 2018-02-26T12:40:12Z
      DOI: 10.1016/j.chaos.2018.02.012
      Issue No: Vol. 109 (2018)
  • Thiele modulus having regard to the anomalous diffusion in a catalyst
    • Authors: Alexey Zhokh; Peter Strizhak
      Pages: 58 - 63
      Abstract: Publication date: April 2018
      Source:Chaos, Solitons & Fractals, Volume 109
      Author(s): Alexey Zhokh, Peter Strizhak
      In the present paper, Thiele modulus (TM) for a catalytic reaction with the anomalous diffusion of a reagent in a catalyst pellet is introduced. Different cases of the TM are considered related to the anomalous diffusion process governed by a diffusion equation with the space-fractional, time-fractional, and space-time fractional derivatives. In addition, each fractional derivative is used according to the Caputo and the Riemann–Liouville definitions. Closed-form expressions of the TM for each definition of the fractional derivative are provided. For the time-fractional derivative, the TM is obtained under the assumption of the reaction dynamics nonlinearity. We demonstrate and critically discuss the applicability of the TM obtained for the reaction-diffusion equation with non-integer order derivatives to the evaluation of the parameters of the heterogeneous catalytic process.

      PubDate: 2018-02-26T12:40:12Z
      DOI: 10.1016/j.chaos.2018.02.016
      Issue No: Vol. 109 (2018)
  • Time-varying Hurst–Hölder exponents and the dynamics of
           (in)efficiency in stock markets
    • Authors: Sergio Bianchi; Augusto Pianese
      Pages: 64 - 75
      Abstract: Publication date: April 2018
      Source:Chaos, Solitons & Fractals, Volume 109
      Author(s): Sergio Bianchi, Augusto Pianese
      The increasing empirical evidence against the paradigm that stock markets behave efficiently suggests to relax the too restrictive dichotomy between efficient and inefficient markets. Starting from the idea that financial prices evolve in a continuum of equilibria and disequilibria, we use the Hurst–Hölder exponent to quantify the pointwise degree of (in)efficiency and introduce the notion of α-efficiency. We then define and study the properties of two functions which are used to build indicators providing timely information about the market efficiency. We apply our tools to the analysis of four stock indexes representative of U.S., Europe and Asia.

      PubDate: 2018-02-26T12:40:12Z
      DOI: 10.1016/j.chaos.2018.02.015
      Issue No: Vol. 109 (2018)
  • Infinite lattice of hyperchaotic strange attractors
    • Authors: Chunbiao Li; Julien Clinton Sprott; Tomasz Kapitaniak; Tianai Lu
      Pages: 76 - 82
      Abstract: Publication date: April 2018
      Source:Chaos, Solitons & Fractals, Volume 109
      Author(s): Chunbiao Li, Julien Clinton Sprott, Tomasz Kapitaniak, Tianai Lu
      By introducing trigonometric functions in a 4-D hyperchaotic snap system, infinite 1-D, 2-D, and 3-D lattices of hyperchaotic strange attractors were produced. Furthermore a general approach was developed for constructing self-reproducing systems, in which infinitely many attractors share the same Lyapunov exponents. In this case, cumbersome constants are necessary to obtain offset boosting; correspondingly additional periodic functions are needed for attractor hatching. As an example, a hyperchaotic system with a hidden attractor was transformed for reproducing 1-D, 2-D infinite lattices of hyperchaotic attractors and a 4-D lattice of chaotic attractors.

      PubDate: 2018-02-26T12:40:12Z
      DOI: 10.1016/j.chaos.2018.02.022
      Issue No: Vol. 109 (2018)
  • Two-dimensional solitons in cubic-saturable media with PT-symmetric
    • Authors: İzzet Göksel; Nalan Antar; İlkay Bakırtaş
      Pages: 83 - 89
      Abstract: Publication date: April 2018
      Source:Chaos, Solitons & Fractals, Volume 109
      Author(s): İzzet Göksel, Nalan Antar, İlkay Bakırtaş
      In this paper, we discuss the existence of lattice solitons supported by cubic-saturable nonlinearity in the framework of nonlinear Schrödinger (NLS) equation with external potentials such as parity-time-symmetric lattices with and without defects by using the pseudo-spectral renormalization method. Linear and nonlinear stability properties of the lattice solitons centered on the maximum of the PT -symmetric potential are investigated in detail.

      PubDate: 2018-02-26T12:40:12Z
      DOI: 10.1016/j.chaos.2018.02.019
      Issue No: Vol. 109 (2018)
  • Rogue waves for the coupled variable-coefficient fourth-order nonlinear
           Schrödinger equations in an inhomogeneous optical fiber
    • Authors: Zhong Du; Bo Tian; Han-Peng Chai; Yan Sun; Xue-Hui Zhao
      Pages: 90 - 98
      Abstract: Publication date: April 2018
      Source:Chaos, Solitons & Fractals, Volume 109
      Author(s): Zhong Du, Bo Tian, Han-Peng Chai, Yan Sun, Xue-Hui Zhao
      In this paper, investigation is made on the coupled variable-coefficient fourth-order nonlinear Schrödinger equations, which describe the simultaneous propagation of optical pulses in an inhomogeneous optical fiber. Via the generalized Darboux transformation, the first- and second-order rogue wave solutions are constructed. Based on such solutions, effects of the group velocity dispersion coefficient and the fourth-order dispersion coefficient on the rogue waves are graphically analyzed. The first-order rogue waves with the eye-shaped distribution, the interactions between the first-order rogue waves with solitons, and the second-order rogue waves with one highest peak and with the triangular structure are displayed. When the value of the group velocity dispersion coefficient or the fourth-order dispersion increases, range of the first-order rogue wave increases. Composite rogue waves are obtained, where the temporal separation between two adjacent rogue waves can be changed if we adjust the group velocity dispersion coefficient and fourth-order dispersion coefficient. Periodic rogue waves are presented. Periods of such rogue waves decrease with the periods of the group-velocity dispersion and fourth-order dispersion coefficient decreasing.

      PubDate: 2018-02-26T12:40:12Z
      DOI: 10.1016/j.chaos.2018.02.017
      Issue No: Vol. 109 (2018)
  • Localization in one-dimensional tight-binding model with chaotic binary
    • Authors: Hiroaki S. Yamada
      Pages: 99 - 106
      Abstract: Publication date: April 2018
      Source:Chaos, Solitons & Fractals, Volume 109
      Author(s): Hiroaki S. Yamada
      We have numerically investigated localization properties in the one-dimensional tight-binding model with chaotic binary on-site energy sequences generated by a modified Bernoulli map with the stationary-nonstationary chaotic transition (SNCT). The energy sequences in question might be characterized by their correlation parameter B and the potential strength W. The quantum states resulting from such sequences have been characterized in the two ways: Lyapunov exponent at band centre and the dynamics of the initially localized wavepacket. Specifically, the B − dependence of the relevant Lyapunov exponent’s decay is changing from linear to exponential one around the SNCT (B ≃ 2). Moreover, here we show that even in the nonstationary regime, mean square displacement (MSD) of the wavepacket is noticeably suppressed in the long-time limit (dynamical localization). The B − dependence of the dynamical localization lengths determined by the MSD exhibits a clear change in the functional behaviour around SNCT, and its rapid increase gets much more moderate one for B ≥ 2. Moreover we show that the localization dynamics for B > 3/2 deviates from the one-parameter scaling of the localization in the transient region.

      PubDate: 2018-02-26T12:40:12Z
      DOI: 10.1016/j.chaos.2018.02.025
      Issue No: Vol. 109 (2018)
  • Tertiary and Quaternary States in the Taylor-Couette System
    • Authors: T. Akinaga; S.C. Generalis; F.H. Busse
      Pages: 107 - 117
      Abstract: Publication date: April 2018
      Source:Chaos, Solitons & Fractals, Volume 109
      Author(s): T. Akinaga, S.C. Generalis, F.H. Busse
      The analysis of the Taylor-Couette problem in the small gap limit is extended to the cases of tertiary and quaternary solutions. The theoretical results are compared with experimental observations. Although in the latter the small-gap approximation is not always well approximated, the comparison of theoretical results and observations yields reasonable agreements. The absence of the wavy twist mode in the observed patterns is explained by the presence of no-slip boundary conditions in the axial direction of the experimental apparatus, which differ from the periodic conditions imposed in the theoretical analysis. Quaternary solutions bifurcating from the tertiary ones through subharmonic instabilities are presented and compared with experimental observations. Reasonable agreement has been found.

      PubDate: 2018-02-26T12:40:12Z
      DOI: 10.1016/j.chaos.2018.01.033
      Issue No: Vol. 109 (2018)
  • Multifractal analysis of the time series of daily means of wind speed in
           complex regions
    • Authors: Mohamed Laib; Jean Golay; Luciano Telesca; Mikhail Kanevski
      Pages: 118 - 127
      Abstract: Publication date: April 2018
      Source:Chaos, Solitons & Fractals, Volume 109
      Author(s): Mohamed Laib, Jean Golay, Luciano Telesca, Mikhail Kanevski
      In this paper, we applied the multifractal detrended fluctuation analysis to the daily means of wind speed measured by 119 weather stations distributed over the territory of Switzerland. The analysis was focused on the inner time fluctuations of wind speed, which could be linked with the local conditions of the highly varying topography of Switzerland. Our findings point out to a persistent behaviour of almost all measured wind speed series (indicated by a Hurst exponent larger than 0.5), and to a high multifractality degree indicating a relative dominance of the large fluctuations in the dynamics of wind speed, especially on the Swiss Plateau, which is comprised between the Jura and Alps mountain ranges. The study represents a contribution to the understanding of the dynamical mechanisms of wind speed variability in mountainous regions.

      PubDate: 2018-02-26T12:40:12Z
      DOI: 10.1016/j.chaos.2018.02.024
      Issue No: Vol. 109 (2018)
  • Spike-timing-dependent plasticity optimized coherence resonance and
           synchronization transitions by autaptic delay in adaptive scale-free
           neuronal networks
    • Authors: Huijuan Xie; Yubing Gong; Baoying Wang
      Pages: 1 - 7
      Abstract: Publication date: March 2018
      Source:Chaos, Solitons & Fractals, Volume 108
      Author(s): Huijuan Xie, Yubing Gong, Baoying Wang
      In this paper, we numerically study the effect of spike-timing-dependent plasticity on multiple coherence resonance and synchronization transitions induced by autaptic time delay in adaptive scale-free Hodgkin–Huxley neuron networks. As the adjusting rate Ap of spike-timing-dependent plasticity increases, multiple coherence resonance and synchronization transitions enhance and become strongest at an intermediate Ap value, indicating that there is optimal spike-timing-dependent plasticity that can most strongly enhance the multiple coherence resonance and synchronization transitions. As Ap increases, increasing network average degree has a small effect on multiple coherence resonance, but its effect on synchronization transitions changes from suppressing to enhancing it. As network size is varied, multiple coherence resonance and synchronization transitions nearly do not change. These results show that spike-timing-dependent plasticity can simultaneously optimize multiple coherence resonance and synchronization transitions by autaptic delay in the adaptive scale-free neuronal networks. These findings provide a new insight into spike-timing-dependent plasticity and autaptic delay for the information processing and transmission in neural systems.

      PubDate: 2018-02-05T16:17:15Z
      DOI: 10.1016/j.chaos.2018.01.020
      Issue No: Vol. 108 (2018)
  • Stochastic resonance in a time polo-delayed asymmetry bistable system
           driven by multiplicative white noise and additive color noise
    • Authors: Peiming Shi; Haifeng Xia; Dongying Han; Rongrong Fu; Danzhen Yuan
      Pages: 8 - 14
      Abstract: Publication date: March 2018
      Source:Chaos, Solitons & Fractals, Volume 108
      Author(s): Peiming Shi, Haifeng Xia, Dongying Han, Rongrong Fu, Danzhen Yuan
      Stochastic resonance (SR) in a time polo-delayed asymmetry bistable system driven by multiplicative white noise and additive color noise is investigated in this paper. First, the effective potential function is deduced based on probability density approach theory, small delay approximation theory and colored noise approximation theory. Second, the mean first-passage time (MFPT) which plays an important role in investigating on particles escape rate is derived and we find that the effect of additive color noise is more observable than that of multiplicative white noise on MFPT. Finally, influences of different parameters on SR are studied by signal-to-noise ratio (SNR). The analytic expression of SNR is derived and three-dimensional graphs of SNR with different parameters are obtained. We conclude that time delay τ and time delay strength e can suppress SR and that asymmetric item r has a non-monotone effect on SR. The results also suggest that adjusting the additive noise intensity Q is more sensitive than that of the multiplicative noise intensity D in controlling SNR.

      PubDate: 2018-02-05T16:17:15Z
      DOI: 10.1016/j.chaos.2018.01.022
      Issue No: Vol. 108 (2018)
  • Investigation of dynamical behaviors of neurons driven by memristive
    • Authors: Ge Zhang; Chunni Wang; Faris Alzahrani; Fuqiang Wu; Xinlei An
      Pages: 15 - 24
      Abstract: Publication date: March 2018
      Source:Chaos, Solitons & Fractals, Volume 108
      Author(s): Ge Zhang, Chunni Wang, Faris Alzahrani, Fuqiang Wu, Xinlei An
      Synapse is an important bridge for receiving and encoding signals, and the description for synapse current is critical for further signal processing. This paper investigates the dynamical characteristic in isolated neuron and chain neuronal networks with memristive autapse or synapses, respectively. Autapse plays important role in modulating the electrical activities, and thus the information encoding is enhanced. Within the improved neuron model, memristor is used to map the modulation of synapse current. Within an isolated new neuron model with memory, the modes in electrical activities can be controlled by the synapse current completely. Bifurcation analysis is carried out and mode transition is discussed. Furthermore, the modulation of synapse current on chain network is investigated, and the dependence of wave propagation on intensity of synapse is discussed. The diversity in synapse current can suppress the synchronization approach on the network.

      PubDate: 2018-02-05T16:17:15Z
      DOI: 10.1016/j.chaos.2018.01.017
      Issue No: Vol. 108 (2018)
  • The route to synchrony via drum head mode and mixed oscillatory state in
           star coupled Hindmarsh–Rose neural network
    • Authors: K. Usha; P.  A. Subha; Chitra R. Nayak
      Pages: 25 - 31
      Abstract: Publication date: March 2018
      Source:Chaos, Solitons & Fractals, Volume 108
      Author(s): K. Usha, P.  A. Subha, Chitra R. Nayak
      Network of coupled oscillators exhibit different types of spatiotemporal patterns. We report that as the coupling strength increases the unidirectionally coupled Hindmarsh–Rose neuron star network will synchronize. The condition for synchronization has been evaluated using Lyapunov function method. We also discuss the dynamics of the system in the presence of controllers. The control input generate interesting behaviors which consist of clusters of spatially coherent domains depending on the coupling strength. Drum head mode, mixed oscillatory state, desynchrony, and multi cluster states are formed and cluster reduction takes place before settling to complete synchrony. The evolution of a perfectly synchronized state via drum head mode, mixed oscillatory state, and clusters from a desynchronized state is reported for the first time. The parameter values which lead to stable cluster formation is also discussed. Our results suggest that in the presence of controllers the common oscillator in the star network behaves as a driver and generates the transitions and cluster formation acts as a precursor to complete synchrony in Hindmarsh–Rose model with unidirectional star coupling.

      PubDate: 2018-02-05T16:17:15Z
      DOI: 10.1016/j.chaos.2018.01.016
      Issue No: Vol. 108 (2018)
  • Allee effect induced diversity in evolutionary dynamics
    • Authors: Aman Dhiman; Swarup Poria
      Pages: 32 - 38
      Abstract: Publication date: March 2018
      Source:Chaos, Solitons & Fractals, Volume 108
      Author(s): Aman Dhiman, Swarup Poria
      Cyclic dominance is observed in predator-prey interactions, the mating strategy of side-blotched lizards, the overgrowth of marine sessile organisms and competition in microbial populations and many other natural systems. Rock-Paper-Scissor(RPS) is a popular game which demonstrates cyclic dominance. In this paper, we investigate replicator dynamics of RPS-game under logistic growth functions with Allee effect. The results obtained are compared with the case of no Allee effect. Due to Allee effect the number of stable attractors increases in a certain parameter region. The obtained result can be interpreted biologically that diversity of an ecological system increases due to Allee effect.

      PubDate: 2018-02-05T16:17:15Z
      DOI: 10.1016/j.chaos.2018.01.026
      Issue No: Vol. 108 (2018)
  • Generalized Tikhonov methods for an inverse source problem of the
           time-fractional diffusion equation
    • Authors: Yong-Ki Ma; P. Prakash; A. Deiveegan
      Pages: 39 - 48
      Abstract: Publication date: March 2018
      Source:Chaos, Solitons & Fractals, Volume 108
      Author(s): Yong-Ki Ma, P. Prakash, A. Deiveegan
      In this paper, we identify the unknown space-dependent source term in a time-fractional diffusion equation with variable coefficients in a bounded domain where additional data are consider at a fixed time. Using the generalized and revised generalized Tikhonov regularization methods, we construct regularized solutions. Convergence estimates for both methods under an a-priori and a-posteriori regularization parameter choice rules are given, respectively. Numerical example shows that the proposed methods are effective and stable.

      PubDate: 2018-02-05T16:17:15Z
      DOI: 10.1016/j.chaos.2018.01.003
      Issue No: Vol. 108 (2018)
  • Fixed-time synchronization of hybrid coupled networks with time-varying
    • Authors: Chuan Chen; Lixiang Li; Haipeng Peng; Jürgen Kurths; Yixian Yang
      Pages: 49 - 56
      Abstract: Publication date: March 2018
      Source:Chaos, Solitons & Fractals, Volume 108
      Author(s): Chuan Chen, Lixiang Li, Haipeng Peng, Jürgen Kurths, Yixian Yang
      In this paper, we study the fixed-time synchronization of hybrid coupled networks, which have only one transmittal delay in the delayed coupling terms. The settling time of fixed-time synchronization can be adjusted to some desired values in advance regardless of the initial conditions. By constructing suitable Lyapunov functions and designing delay-dependent feedback controllers, we derive several novel synchronization criteria, which guarantee the considered hybrid coupled networks can achieve fixed-time synchronization. Two numerical examples are given to show the effectiveness of our results.

      PubDate: 2018-02-05T16:17:15Z
      DOI: 10.1016/j.chaos.2018.01.027
      Issue No: Vol. 108 (2018)
  • A novel trust-based community detection algorithm used in social networks
    • Authors: Xianhuan Chen; Chengyi Xia; Jin Wang
      Pages: 57 - 65
      Abstract: Publication date: March 2018
      Source:Chaos, Solitons & Fractals, Volume 108
      Author(s): Xianhuan Chen, Chengyi Xia, Jin Wang
      Mining the community structure is an important subject in the area of social network analysis, and detecting the hidden communities within the social networks will help to better understand the topological properties of the real-life networks. Meanwhile, community detection will be also helpful to monitor the public opinion, identify the opinion leaders and perform the personalized recommendation. In comparison with the simplex user ties or contents, considering the trust features from multiple users will provide a more comprehensive account of the linking relationship between users. To this end, we propose a novel non-overlapping community detection algorithm, which is based on the trust mechanism, to recognize the community structure in this paper. At first, we propose several definitions with regard to trust relationship between users to depict the trust strength, which includes the direct, indirect and mutual trust, and then the specific trust calculation method is provided to quantitatively describe the extent of trust. Secondly, starting from the trust relationship, we integrate the edge fitness and community fitness into the non-overlapping community detection and propose a novel trust-based algorithm to comprehensively leverage the trust among nodes to further mine the communities within the networks. Finally, to deeply analyze the analyze the performance, we take use of Lesmis and Gemo data sets to carry out extensive experiments, and the results show that, compared with other classical algorithms, the community based on the newly proposed algorithm features the higher trust cohesion on the condition that the structural cohesiveness of social network is fully satisfied. The current methods will be of significance to deeply understand and effectively find out the communities within realistic networks.

      PubDate: 2018-02-05T16:17:15Z
      DOI: 10.1016/j.chaos.2018.01.025
      Issue No: Vol. 108 (2018)
  • Donation of richer individual can support cooperation in spatial voluntary
           prisoner's dilemma game
    • Authors: Deming Mao; Zhenxi Niu
      Pages: 66 - 70
      Abstract: Publication date: March 2018
      Source:Chaos, Solitons & Fractals, Volume 108
      Author(s): Deming Mao, Zhenxi Niu
      The compassionate behavior is present throughout the human society, and rich people always could not help having sympathy for poor individual. Inspired by this fact, we consider a donation model to describe the emergency and maintenance of cooperation with voluntary participate in spatial prisoner's dilemma game and we study this model on a square lattice. In detail, when the focal player has the least income in the group which includes his nearest four neighbors and himself, one of his neighbors who has the highest income will donate some proportion of his extra money to him. On the other hand, if focal individual is not the poorest, he will donate some incomes to his poorest neighbor. Through numeric simulation, we conclude that our donation model can promote the evolution of cooperation monotonously. Especially, the larger proportion payoff rich people can contribute, the higher level of cooperation we can get.

      PubDate: 2018-02-05T16:17:15Z
      DOI: 10.1016/j.chaos.2018.01.014
      Issue No: Vol. 108 (2018)
  • Fractal phase space and fractal entropy of instantaneous cardiac rhythm
    • Authors: V.P. Tsvetkov; S.A. Mikheyev; I.V. Tsvetkov
      Pages: 71 - 76
      Abstract: Publication date: March 2018
      Source:Chaos, Solitons & Fractals, Volume 108
      Author(s): V.P. Tsvetkov, S.A. Mikheyev, I.V. Tsvetkov
      The paper is devoted to the study of cardiac rhythm variability (CRV) using the phase and extended phase spaces of instantaneous cardiac rhythm (ICR) obtained from the Holter monitoring (HM) data. In order to construct these spaces, a software package is developed and implemented. With specific references, the fractality of the ICR phase space is demonstrated. The fractal phase space volume and fractal entropy definitions of ICR are given. The paper justifies their availability for CRV quantitative assessment.

      PubDate: 2018-02-05T16:17:15Z
      DOI: 10.1016/j.chaos.2018.01.030
      Issue No: Vol. 108 (2018)
  • Residual symmetry, interaction solutions and consistent tanh expansion
           solvability for the third-order Burgers equation
    • Authors: Hengchun Hu; Yueyue Li; Haidong Zhu
      Pages: 77 - 81
      Abstract: Publication date: March 2018
      Source:Chaos, Solitons & Fractals, Volume 108
      Author(s): Hengchun Hu, Yueyue Li, Haidong Zhu
      The residual symmetries for the third-order Burgers equation are obtained with the truncated Painlevé method. The nonlocal symmetries can be localized to the Lie point symmetries by introducing auxiliary dependent variables and the corresponding finite transformations are computed directly. New exact solutions of the third-order Burgers equation is also proved to have the consistent tanh expansion form. New exact interaction excitations such as soliton-cnoidal wave solutions and soliton-periodic wave solutions are given out analytically and graphically.

      PubDate: 2018-02-05T16:17:15Z
      DOI: 10.1016/j.chaos.2018.01.023
      Issue No: Vol. 108 (2018)
  • Complexity measures of music
    • Authors: April Pease; Korosh Mahmoodi; Bruce J. West
      Pages: 82 - 86
      Abstract: Publication date: March 2018
      Source:Chaos, Solitons & Fractals, Volume 108
      Author(s): April Pease, Korosh Mahmoodi, Bruce J. West
      We present a technique to search for the presence of crucial events in music, based on the analysis of the music volume. Earlier work on this issue was based on the assumption that crucial events correspond to the change of music notes, with the interesting result that the complexity index of the crucial events is μ ≈ 2, which is the same inverse power-law index of the dynamics of the brain. The search technique analyzes music volume and confirms the results of the earlier work, thereby contributing to the explanation as to why the brain is sensitive to music, through the phenomenon of complexity matching. Complexity matching has recently been interpreted as the transfer of multifractality from one complex network to another. For this reason we also examine the mulifractality of music, with the observation that the multifractal spectrum of a computer performance is significantly narrower than the multifractal spectrum of a human performance of the same musical score. We conjecture that although crucial events are demonstrably important for information transmission, they alone are not sufficient to define musicality, which is more adequately measured by the multifractality spectrum.

      PubDate: 2018-02-05T16:17:15Z
      DOI: 10.1016/j.chaos.2018.01.021
      Issue No: Vol. 108 (2018)
  • Robust adaptive beam-forming optimization method based on diagonal-loading
           and MSE criterion
    • Authors: Zheng-Hong Deng; Ji-Wei Xu; Xue-Qiang Li; Feng Huang
      Pages: 87 - 93
      Abstract: Publication date: March 2018
      Source:Chaos, Solitons & Fractals, Volume 108
      Author(s): Zheng-Hong Deng, Ji-Wei Xu, Xue-Qiang Li, Feng Huang
      Smart antenna can effectively suppress multipath interference, co-channel interference, and improves the transmission quality of signal and the utilization of spectrum, so it is widely applied in wireless communication network. To explore the optimization problem about smart antenna receiving array and sensor network which exists in radar, sonar and other systems, here we presents a kind of adaptive beam-forming algorithm based on diagonal-loading and mean square error (MSE) criterion. Such a novel algorithm could give the optimal solution of weight direction vector, and at the same guarantees its own robustness. Furthermore, it also possesses the advantage of shortening the convergence time of weight direction vector, and decreasing the sensitive issue of model error in high SNR environment. In our simulation experiments, it is shown that the proposed algorithm improves the performance of receiver network in sonar system, and to a certain extent achieves the signal optimization.

      PubDate: 2018-02-05T16:17:15Z
      DOI: 10.1016/j.chaos.2018.01.031
      Issue No: Vol. 108 (2018)
  • Complexity and heterogeneity in a dynamic network
    • Authors: David Lambert; Fabio Vanni
      Pages: 94 - 103
      Abstract: Publication date: March 2018
      Source:Chaos, Solitons & Fractals, Volume 108
      Author(s): David Lambert, Fabio Vanni
      We present an approximate analytical solution for the connectivity of a network model with a “non-simultaneous” linking scheme. This model exhibits node-space correlations in the link distribution, anomalous fluctuations in the time series of the connectivity variable, and a finite-size effect: the maximum number of links occurs away from the critical value of the system parameter. We derive an exact Master Equation for this model in the form of an infinitesimal time-evolution operator. Fluctuations are much more important than the mean-field approximation predicts, which we attribute to the heterogeneity in the model. Finally, we give a sketch of possible real world applications where the value of a network is related to the number of links.

      PubDate: 2018-02-05T16:17:15Z
      DOI: 10.1016/j.chaos.2018.01.024
      Issue No: Vol. 108 (2018)
  • Zero topological entropy for C1 generic vector fields
    • Authors: Manseob Lee
      Pages: 104 - 106
      Abstract: Publication date: March 2018
      Source:Chaos, Solitons & Fractals, Volume 108
      Author(s): Manseob Lee
      In this paper, we show that C 1 generically, a vector field X has zero topological entropy if there are a C 1 neighborhood U of X and d > 0 such that for every Y ∈ U and a periodic point p of Y, ∥ P π ( p ) Y N p ∥ < π ( p ) d , where π(p) is the period of p, and PY is the linear Poincaré flow associated to Y. This result is a generalization of Arbieto and Morales [1].

      PubDate: 2018-02-05T16:17:15Z
      DOI: 10.1016/j.chaos.2018.01.034
      Issue No: Vol. 108 (2018)
  • Theory and applications of a more general form for fractional power series
    • Authors: I. Jaradat; M. Al-Dolat; K. Al-Zoubi; M. Alquran
      Pages: 107 - 110
      Abstract: Publication date: March 2018
      Source:Chaos, Solitons & Fractals, Volume 108
      Author(s): I. Jaradat, M. Al-Dolat, K. Al-Zoubi, M. Alquran
      The latent potentialities and applications of fractional calculus present a mathematical challenge to establish its theoretical framework. One of these challenges is to have a compact and self-contained fractional power series representation that has a wider application scope and allows studying analytical properties. In this letter, we introduce a new more general form of fractional power series expansion, based on the Caputo sense of fractional derivative, with corresponding convergence property. In order to show the functionality of the proposed expansion, we apply the corresponding iterative fractional power series scheme to solve several fractional (integro-)differential equations.

      PubDate: 2018-02-05T16:17:15Z
      DOI: 10.1016/j.chaos.2018.01.039
      Issue No: Vol. 108 (2018)
  • Destabilization of terrorist networks
    • Authors: H.A. Eiselt
      Pages: 111 - 118
      Abstract: Publication date: March 2018
      Source:Chaos, Solitons & Fractals, Volume 108
      Author(s): H.A. Eiselt
      This paper uses a three-phase process to first describe the development of a network to describe different types of relations between terrorists and their supporters. It continues to review some of the usual measures of social network analysis to evaluate different positions in the network. Finally, the work describes different methods to destabilize the terrorist network, and, based on sensitivity analyses, determines the potential of certain actions and the vulnerability of the network.

      PubDate: 2018-02-05T16:17:15Z
      DOI: 10.1016/j.chaos.2018.01.018
      Issue No: Vol. 108 (2018)
  • Dynamics towards the steady state applied for the Smith-Slatkin mapping
    • Authors: Juliano A. de Oliveira; Larissa C. N. Ramos; Edson D. Leonel
      Pages: 119 - 122
      Abstract: Publication date: March 2018
      Source:Chaos, Solitons & Fractals, Volume 108
      Author(s): Juliano A. de Oliveira, Larissa C. N. Ramos, Edson D. Leonel
      We derived explicit forms for the convergence to the steady state for a 1-D Smith–Slatkin mapping at and near at bifurcations. We used a phenomenological description with a set of scaling hypothesis leading to a homogeneous function giving a scaling law. The procedure is supported by numerical simulations and confirmed by a theoretical description. At the bifurcation we used an approximation transforming the difference equation into a differential one whose solution remount all scaling features. Near the bifurcation an investigation of fixed point stability leads to the decay for the stationary state. Simulations are made in the pitchfork, transcritical and period doubling bifurcations.

      PubDate: 2018-02-05T16:17:15Z
      DOI: 10.1016/j.chaos.2017.12.024
      Issue No: Vol. 108 (2018)
  • The extinction and persistence of the stochastic hepatitis B epidemic
    • Authors: Tahir Khan; Amir Khan; Gul Zaman
      Pages: 123 - 128
      Abstract: Publication date: March 2018
      Source:Chaos, Solitons & Fractals, Volume 108
      Author(s): Tahir Khan, Amir Khan, Gul Zaman
      We discuss the dynamic of a stochastic hepatitis B epidemic model. A stochastic hepatitis B model is formulated with a varying population environment for a long term behavior. The proposed model consists of three classes, namely the susceptible individuals in which the transmission rate is distributed by white noise, the infected individuals in which the same perturbation occurs and the recovered individuals. We derive sufficient conditions for the extinction and the persistence. Finally, we carry out the numerical simulations to support our analytical results.

      PubDate: 2018-02-26T12:40:12Z
      DOI: 10.1016/j.chaos.2018.01.036
      Issue No: Vol. 108 (2018)
  • On the Liouville integrability of Edelstein’s reaction system in R3
    • Authors: Antoni Ferragut; Claudia Valls; Carsten Wiuf
      Pages: 129 - 135
      Abstract: Publication date: March 2018
      Source:Chaos, Solitons & Fractals, Volume 108
      Author(s): Antoni Ferragut, Claudia Valls, Carsten Wiuf
      We consider Edelstein’s dynamical system of three reversible reactions in R 3 and show that it is not Liouville (hence also not Darboux) integrable. To do so, we characterize its polynomial first integrals, Darboux polynomials and exponential factors.

      PubDate: 2018-02-26T12:40:12Z
      DOI: 10.1016/j.chaos.2018.01.029
      Issue No: Vol. 108 (2018)
  • Modeling a combined forecast algorithm based on sequence patterns and near
           characteristics: An application for tourism demand forecasting
    • Authors: Wang Jun; Luo Yuyan; Tang Lingyu; Ge Peng
      Pages: 136 - 147
      Abstract: Publication date: March 2018
      Source:Chaos, Solitons & Fractals, Volume 108
      Author(s): Wang Jun, Luo Yuyan, Tang Lingyu, Ge Peng
      Tourism demand forecasting is essential for forward tourism planning. To develop appropriate public policies and ensure sound business investment decisions, both government administrations and private sector businesses use basic tourist demand forecasting to plan future operations and assess the need for facilities and infrastructure investment. Therefore, forecasting has become indispensable to tourism management. This study proposes a combined tourism forecasting model using an artificial neural network (ANN) and a clustering algorithm, which considers two aspects of the given data series: sequence patterns and near characteristics, which embody structural changes and time series correlations. Training data were clustered into homogenous groups, and for each cluster, a dedicated forecaster was employed. Several neighboring samples were then selected to capture the current changes in the data series trends. Finally, the two prediction results derived from the sequence patterns and near characteristics were combined to determine the final forecast results. To verify the superiority and accuracy of the proposed model, it was compared with three other ANN-based models and the most popular ARIMA model using three non-linear, non-stationary tourist arrivals data series. Experimental cases studies demonstrated that the proposed combination method consistently outperformed the other related methods.

      PubDate: 2018-02-26T12:40:12Z
      DOI: 10.1016/j.chaos.2018.01.028
      Issue No: Vol. 108 (2018)
  • Traveling wave fronts of a single species model with cannibalism and
           nonlocal effect
    • Authors: Hong-Tao Zhang; Li Li
      Pages: 148 - 153
      Abstract: Publication date: March 2018
      Source:Chaos, Solitons & Fractals, Volume 108
      Author(s): Hong-Tao Zhang, Li Li
      In this paper, we present a single species model with cannibalism and nonlocal effect. The existence of traveling wave fronts connecting the equilibrium 0 to the equilibrium K r r + K h is proved when the wave speed c ≥ 2 r .

      PubDate: 2018-02-26T12:40:12Z
      DOI: 10.1016/j.chaos.2018.01.038
      Issue No: Vol. 108 (2018)
  • Global analysis of an age-structured SEIR endemic model
    • Authors: Asaf Khan; Gul Zaman
      Pages: 154 - 165
      Abstract: Publication date: March 2018
      Source:Chaos, Solitons & Fractals, Volume 108
      Author(s): Asaf Khan, Gul Zaman
      In the present study, an age-structured SEIR endemic model is considered. The population is assumed to be not constant due to different inflows and outflows that are imbalanced by demographics, and migration etc. An abstract Cauchy problem is formulated from the model in order to show that the model is well-posed. The local and global stability of the disease-free steady state is examined using the basic reproduction number R 0. Under certain condition, the endemic steady state is shown to be exist and locally stable. To illustrate the main theorems, sample simulations are presented at the end of the paper.

      PubDate: 2018-02-26T12:40:12Z
      DOI: 10.1016/j.chaos.2018.01.037
      Issue No: Vol. 108 (2018)
  • Impact of colored cross-correlated non-Gaussian and Gaussian noises on
           stochastic resonance and stochastic stability for a metapopulation system
           driven by a multiplicative signal
    • Authors: Kang-Kang Wang; Lin Ju; Ya-Jun Wang; Sheng-Hong Li
      Pages: 166 - 181
      Abstract: Publication date: March 2018
      Source:Chaos, Solitons & Fractals, Volume 108
      Author(s): Kang-Kang Wang, Lin Ju, Ya-Jun Wang, Sheng-Hong Li
      In this paper, our aim is to investigate the steady state characteristics and the signal-to-noise ratio (SNR) for a stochastic metapopulation system including a multiplicative periodic signal caused by the terms of the colored cross-correlated multiplicative non-Gaussian noise and additive Gaussian noise. Numerical results indicate that the multiplicative noise, the additive one and the departure parameter from the Gaussian noise can all decrease the stability of the ecological population system and restrain the development of the metapopulation, while two noise correlation times and the strength of the noise correlation will enhance the stability of the biological system and promote the expansion of the population system. With regard to the stochastic resonance phenomenon (SR) induced by noise terms and a multiplicative weak periodic signal, the results illustrate that the noise correlation time τ and the strength of correlation noise λ can increase the SR effect greatly in most cases, while the intensity of the multiplicative noise Q mainly plays a part in suppressing the SR and weakening the SNR except that in the SNR-τ plot. Moreover, it is worth noting that the noise correlation time τ 0 and the additive noise intensity M can play the diverse roles in enhancing or weakening the SR effect under the different system parameter conditions.

      PubDate: 2018-02-26T12:40:12Z
      DOI: 10.1016/j.chaos.2018.02.004
      Issue No: Vol. 108 (2018)
  • Extreme multi-stability: When imperfection changes quality
    • Authors: Sajad Jafari; Atefeh Ahmadi; Shirin Panahi; Karthikeyan Rajagopal
      Pages: 182 - 186
      Abstract: Publication date: March 2018
      Source:Chaos, Solitons & Fractals, Volume 108
      Author(s): Sajad Jafari, Atefeh Ahmadi, Shirin Panahi, Karthikeyan Rajagopal
      In this paper, we discuss how chaotic systems show the importance of imperfection. This happens through the butterfly effect. Then we discuss that chaotic systems with extreme multi-stability can much better demonstrate such importance. The reason is that in such systems not only the quantity of time-series is affected by butterfly effect, but also the quality of time-series is changed by small imperfections in parameters or initial conditions. We prove the importance of that difference better by comparing the efficiency of a newly proposed parameter estimation method on both an ordinary chaotic system and a chaotic system with extreme multi-stability.

      PubDate: 2018-02-26T12:40:12Z
      DOI: 10.1016/j.chaos.2018.02.005
      Issue No: Vol. 108 (2018)
  • Mechanical analysis and bound of plasma chaotic system
    • Authors: Yingjuan Yang; Guoyuan Qi
      Pages: 187 - 195
      Abstract: Publication date: March 2018
      Source:Chaos, Solitons & Fractals, Volume 108
      Author(s): Yingjuan Yang, Guoyuan Qi
      Plasma is normally investigated via fluid dynamics, and to investigate the force and energy underlying a plasma chaotic system, it is first transformed into a Kolmogorov-type system. This system describes a general form of fluid and forced-dissipative rigid body system. The vector field of the plasma chaotic system is decomposed into four types of torque: inertial torque, internal torque, dissipation, and external torque. The Hamiltonian energy transfer between kinetic energy and potential is discovered. The various combinations of these four types of torque are constructed to uncover the effect of each on the generation of the dynamic mode of the chaotic system. The physical functions of the whistler and dampening of the pump are identified in producing the different plasma dynamics. Aside from the torque effects, the rate of change of the Casimir function is also a key factor in characterizing the orbit behavior of the plasma system. Last, a supremum bound of the plasma chaotic attractor is proposed.

      PubDate: 2018-02-26T12:40:12Z
      DOI: 10.1016/j.chaos.2018.01.035
      Issue No: Vol. 108 (2018)
  • Epidemic dynamics on information-driven adaptive networks
    • Authors: Xiu-Xiu Zhan; Chuang Liu; Gui-Quan Sun; Zi-Ke Zhang
      Pages: 196 - 204
      Abstract: Publication date: March 2018
      Source:Chaos, Solitons & Fractals, Volume 108
      Author(s): Xiu-Xiu Zhan, Chuang Liu, Gui-Quan Sun, Zi-Ke Zhang
      Research on the interplay between the dynamics on the network and the dynamics of the network has attracted much attention in recent years. In this work, we propose an information-driven adaptive model, where disease and disease information can evolve simultaneously. For the information-driven adaptive process, susceptible (infected) individuals who have abilities to recognize the disease would break the links of their infected (susceptible) neighbors to prevent the epidemic from further spreading. Simulation results and numerical analyses based on the pairwise approach indicate that the information-driven adaptive process can not only slow down the speed of epidemic spreading, but can also diminish the epidemic prevalence at the final state significantly. In addition, the disease spreading and information diffusion pattern on the lattice as well as on a real-world network give visual representations about how the disease is trapped into an isolated field with the information-driven adaptive process. Furthermore, we perform the local bifurcation analysis on four types of dynamical regions, including healthy, a continuous dynamic behavior, bistable and endemic, to understand the evolution of the observed dynamical behaviors. This work may shed some lights on understanding how information affects human activities on responding to epidemic spreading.

      PubDate: 2018-02-26T12:40:12Z
      DOI: 10.1016/j.chaos.2018.02.010
      Issue No: Vol. 108 (2018)
  • A mathematical analysis of Pine Wilt disease with variable population size
           and optimal control strategies
    • Authors: Muhammad Altaf Khan; Rizwan Khan; Yasir Khan; Saeed Islam
      Pages: 205 - 217
      Abstract: Publication date: March 2018
      Source:Chaos, Solitons & Fractals, Volume 108
      Author(s): Muhammad Altaf Khan, Rizwan Khan, Yasir Khan, Saeed Islam
      The present paper describes the dynamics of the Pine Wilt disease with variable population size. The basic mathematical results for the model are presented. The stability analysis of both the disease-free and endemic cases are presented whenever R 0 lesser or greater than one, respectively. Further, an optimal control problem is formulated and the necessarily involved results are presented. Moreover, the numerical simulation of the optimal control problem with suggested control strategies for the possible eliminations of the infection in the pine trees population is presented.

      PubDate: 2018-02-26T12:40:12Z
      DOI: 10.1016/j.chaos.2018.02.002
      Issue No: Vol. 108 (2018)
  • Corrigendum to “Extended theory of harmonic maps connects general
           relativity to chaos and quantum mechanism” [Chaos, Solitons and Fractals
           103 (2017) 567–570]
    • Authors: Xiaobo Zhai; Gang Ren
      Pages: 224 - 227
      Abstract: Publication date: Available online 14 February 2018
      Source:Chaos, Solitons & Fractals
      Author(s): Xiaobo Zhai, Gang Ren

      PubDate: 2018-02-26T12:40:12Z
      DOI: 10.1016/j.chaos.2018.01.032
      Issue No: Vol. 108 (2018)
  • Phase-flip in relay oscillators via linear augmentation
    • Authors: Umeshkanta Singh Thounaojam; Manish Dev Shrimali
      Pages: 5 - 12
      Abstract: Publication date: February 2018
      Source:Chaos, Solitons & Fractals, Volume 107
      Author(s): Umeshkanta Singh Thounaojam, Manish Dev Shrimali
      In time-delay coupled relay system of three limit cycle of oscillators, linear augmentation control provides an effective strategy to induce phase-flip from relative phase zero to π between spatially separated oscillators. A coexisting dynamical regime of fixed point and anti-phase synchronization state is harnessed in relay system. Targeting phase-flip transition through linear augmentation is illustrated by using Stuart-Landau oscillators. However, such dynamical transition does not occur in the same system with conjugate coupling through dissimilar variables. Inducing relative phase difference without resorting to variation of internal system parameters and time-delay is important from the view of system control.

      PubDate: 2018-02-05T16:17:15Z
      DOI: 10.1016/j.chaos.2017.12.004
      Issue No: Vol. 107 (2018)
  • Solitons and shocks in e-p-i magneto-rotating plasma using Cairns
    • Authors: M. Yaqub Khan; Javed Iqbal
      Pages: 13 - 17
      Abstract: Publication date: February 2018
      Source:Chaos, Solitons & Fractals, Volume 107
      Author(s): M. Yaqub Khan, Javed Iqbal
      Solitons and shocks formation are studied in a magnetized rotating electron-ion-positron plasma using Cairns distribution. We derive an admitted solitary wave solution KdV equation and an admitted travelling wave solution KdVB equation. We apply HPM technique on derived KdV equation and tanh-method on derived KdVB equation. It is observed that γ = T h / T P , the ratio of electron temperature to positron temperature, and α = n 0 P / n 0 h , the ratio of number density of positrons to electrons, affect both the soliton width and amplitude. It is also found that γ = T e / T P , α = n 0 P / n 0 h , kinematic viscosity and angular frequency affects the structure of shocks. We have compared our results with publish papers and conclude our results are good. This work may be helpful in order to study the rotating flows of magnetized plasma.

      PubDate: 2017-12-27T05:04:53Z
      DOI: 10.1016/j.chaos.2017.12.009
      Issue No: Vol. 107 (2017)
  • Couple stresses effect on linear instability and nonlinear stability of
           convection in a reacting fluid
    • Authors: Akil J. Harfash; Ghazi Abed Meften
      Pages: 18 - 25
      Abstract: Publication date: February 2018
      Source:Chaos, Solitons & Fractals, Volume 107
      Author(s): Akil J. Harfash, Ghazi Abed Meften
      We study the problem of convective movement of a reacting solute in a viscous incompressible fluid occupying a plane layer and subjected to a couple stresses effects. The thresholds for linear instability are found and compared to those derived by a global nonlinear energy stability analysis. In particular, we analyse the effect of no-slip boundary conditions on the stability and instability of convection. The conditions of no-slip at the boundary with couple stresses effect and non constant coefficients which are analysed for the first time in this article.

      PubDate: 2017-12-27T05:04:53Z
      DOI: 10.1016/j.chaos.2017.12.013
      Issue No: Vol. 107 (2017)
  • Directed clustering in weighted networks: A new perspective
    • Authors: G.P. Clemente; R. Grassi
      Pages: 26 - 38
      Abstract: Publication date: February 2018
      Source:Chaos, Solitons & Fractals, Volume 107
      Author(s): G.P. Clemente, R. Grassi
      Several definitions of clustering coefficient for weighted networks have been proposed in literature, but less attention has been paid to both weighted and directed networks. We provide a new local clustering coefficient for this kind of networks, starting from those already existing in the literature for the weighted and undirected case. Furthermore, we extract from our coefficient four specific components, in order to separately consider different link patterns of triangles. Empirical applications on several real networks from different frameworks and with different order are provided. The performance of our coefficient is also compared with that of existing coefficients.

      PubDate: 2017-12-27T05:04:53Z
      DOI: 10.1016/j.chaos.2017.12.007
      Issue No: Vol. 107 (2017)
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
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