Results 21 to 30 of about 1,843,306 (292)
Adaptive Differential Space-Time-Spreading-Assisted Turbo-Detected Sphere Packing Modulation [PDF]
, 2007 In this contribution a novel adaptive differential space-time spreading assisted turbo detected sphere packingmodulation scheme is proposed for improving the achievable throughput of code division multiple access (CDMA) systems.
El-Hajjar, M +5 more
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Spreading speeds and spreading sets of reaction-diffusion equations
, 2021 This paper deals with the large time dynamics of bounded solutions of reaction-diffusion equations with unbounded initial support in $\mathbb{R}^N$. We prove a variational formula for the spreading speeds in any direction, and we also describe the asymptotic shape of the level sets of the solutions at large time.
Hamel, François, Rossi, Luca
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Numerical simulation of spreading drops [PDF]
, 2013 We consider a liquid drop that spreads on a wettable surface. Different time evolutions have been observed for the base radius r depending of the relative role played by inertia, viscosity, surface tension and the wetting condition. Numerical simulations
Maglio, Marco, Legendre, Dominique
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Downlink Steered Space-Time Spreading For Multi-Carrier Transmission Over Frequency Selective Channels [PDF]
, 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
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Spreading Speeds of Nonlocal KPP Equations in Heterogeneous Media [PDF]
Acta Mathematica Sinica, English Series, 2022 In this paper, we prove the existence of the spreading speed of nonlocal KPP equations in two cases: 1. The media is almost periodic and the kernel of diffusion is continuous; 2. The media is periodic and the diffusion is not continuous but weak irreducible.
Liang, Xing, Zhou, Tao
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Dynamics of a time-periodic and delayed reaction-diffusion model with a quiescent stage
Electronic Journal of Qualitative Theory of Differential Equations, 2016 In this paper, we study a time-periodic and delayed reaction-diffusion system with quiescent stage in both unbounded and bounded habitat domains. In unbounded habitat domain $\mathbb{R}$, we first prove the existence of the asymptotic spreading speed and
Shuang-Ming Wang, Liang Zhang
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Bistable traveling wave solutions in a competitive recursion system with Ricker nonlinearity
Electronic Journal of Qualitative Theory of Differential Equations, 2014 Using an abstract scheme of monotone semiflows, the existence of bistable traveling wave solutions of a competitive recursion system is established. From the viewpoint of population dynamics, the bistable traveling wave solutions describe the strong ...
Shuxia Pan, Jie Liu
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Spreading Speeds and Traveling Waves for Nonmonotone Integrodifference Equations [PDF]
SIAM Journal on Mathematical Analysis, 2008 Summary: The spreading speeds and traveling waves are established for a class of nonmonotone discrete-time integrodifference equation models. It is shown that the spreading speed is linearly determinate and coincides with the minimal wave speed of traveling waves.
Sze-Bi Hsu, Xiao-Qiang Zhao
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Disease and information spreading at different speeds in multiplex networks [PDF]
Physical Review E, 2020 9 pages, 6 ...
Fátima Velásquez-Rojas +5 more
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On the Speed of Spread for Fractional Reaction‐Diffusion Equations [PDF]
International Journal of Differential Equations, 2009 The fractional reaction diffusion equation ∂tu + Au = g(u) is discussed, where A is a fractional differential operator on ℝ of order α ∈ (0, 2), the C1 function g vanishes at ζ = 0 and ζ = 1, and either g ≥ 0 on (0, 1) or g < 0 near ζ = 0. In the case of nonnegative g, it is shown that solutions with initial support on the positive half axis spread ...
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