Results 11 to 20 of about 538,081 (247)

A Rumor-Spreading Model with Three Identical Time Delays

open access: yesMathematics
Understanding the effect of time delays on rumor spreading is of special importance to curbing the spread of rumors. This article proposes a rumor-spreading model with three identical time delays: a delay associated with the negative influence of a ...
Chunlong Fu   +4 more
doaj   +2 more sources

Downlink Steered Space-Time Spreading For Multi-Carrier Transmission Over Frequency Selective Channels [PDF]

open access: yes, 2008
This paper presents a novel amalgam of Steered Space-Time Spreading (SSTS) and Orthogonal Frequency Division Multiple Access (OFDMA) designed for attaining both spatial diversity gain and beamforming gain for transmission over OFDM-symbol-invariant ...
Mohammed El-Hajjar   +5 more
core   +2 more sources

Asymptotic and numerical analysis of a simple model for blade coating [PDF]

open access: yes, 2009
Motivated by the industrial process of blade coating, the two-dimensional flow of a thin film of Newtonian fluid on a horizontal substrate moving parallel to itself with constant speed under a fixed blade of finite length in which the flows upstream and ...
Duffy, B.R.   +3 more
core   +4 more sources

Asymptotic Performance Analysis of Time-Frequency-Domain Spread MC DS-CDMA Systems Employing MMSE Multiuser Detection [PDF]

open access: yes, 2010
In this contribution the asymptotic signal-to-interference-plus-noise ratio (SINR) performance of multicarrier direct-sequence code-division multiple-access systems employing time-frequency-domain spreading, i.e., of the TF/MC DS-CDMA systems, is studied,
Zhang, Youguang   +5 more
core   +2 more sources

Asymptotic Behavior for Radially Symmetric Solutions of a Logistic Equation with a Free Boundary

open access: yesMathematical Modelling and Analysis, 2017
In this paper we investigate a logistic equation with a new free boundary condition appearing in ecology, we aim to describe the spreading of a new or invasive species by studying the asymptotic behavior of the radially symmetric solutions of the problem.
Jingjing Cai, Quanjun Wu
doaj   +1 more source

Vertical Round Buoyant Jets and Fountains in a Linearly, Density-Stratified Fluid

open access: yesFluids, 2020
Turbulent round buoyant jets and fountains issuing vertically into a linearly density-stratified calm ambient have been investigated in a series of laboratory experiments.
Panos N. Papanicolaou   +1 more
doaj   +1 more source

Spreading Dynamics of SHIPR Pyramid Scheme Model on Scale-Free Networks

open access: yesIEEE Access, 2021
Nowadays, pyramid schemes have caused extremely negative effects on people’s lives and seriously damaged the social economy. With the rapid development of network and communication technology, people’s direct or indirect social interaction ...
Bingchuan Xue   +4 more
doaj   +1 more source

Periodic traveling waves and asymptotic spreading of a monostable reaction-diffusion equations with nonlocal effects

open access: yesElectronic Journal of Differential Equations, 2021
This article concerns the dynamical behavior for a reaction-diffusion equation with integral term. First, by using bifurcation analysis and center manifold theorem, the existence of periodic steady-state solution are established for a special kernel ...
Bang-Sheng Han   +3 more
doaj   +3 more sources

Influence of the mode of reproduction on dispersal evolution during species invasion [PDF]

open access: yesESAIM: Proceedings and Surveys, 2020
We consider a reaction-diffusion-reproduction equation, modeling a population which is spatially heterogeneous. The dispersion of each individuals is influenced by its phenotype.
Calvez Vincent   +6 more
doaj   +1 more source

Minimal wave speed of traveling wavefronts in delayed Belousov-Zhabotinskii model

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2012
This paper is concerned with the traveling wavefronts of Belousov-Zhabotinskii model with time delay. By constructing proper upper and lower solutions and applying the theory of asymptotic spreading, the minimal wave speed is obtained under the weaker ...
Shuxia Pan, Jie Liu
doaj   +1 more source

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