Results 21 to 30 of about 45,848 (283)
Influence of the mode of reproduction on dispersal evolution during species invasion [PDF]
ESAIM: 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
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Drop spreading with random viscosity [PDF]
, 2016 We examine theoretically the spreading of a viscous liquid drop over a thin film of uniform thickness, assuming the liquid's viscosity is regulated by the concentration of a solute that is carried passively by the spreading flow. The solute is assumed to
Jensen, Oliver E., Xu, Feng
core +3 more sources
On spreading sequences and asymptotic structures
Transactions of the American Mathematical Society, 2018 In the first part of the paper we study the structure of Banach spaces with a conditional spreading basis. The geometry of such spaces exhibits a striking resemblance to the geometry of James space. Further, we show that the averaging projections onto subspaces spanned by constant coefficient blocks with no gaps between supports are bounded.
Freeman, D. +3 more
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Capacity Approaching Low Density Spreading in Uplink NOMA via Asymptotic Analysis [PDF]
IEEE Transactions on Communications, 2021 Low-density spreading non-orthogonal multiple-access (LDS-NOMA) is considered where $K$ single-antenna user-equipments (UEs) communicate with a base-station (BS) over $F$ fading sub-carriers.
Hossein Asgharimoghaddam +2 more
openaire +3 more sources
Minimal wave speed of traveling wavefronts in delayed Belousov-Zhabotinskii model
Electronic 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
Identify hidden spreaders of pandemic over contact tracing networks
Scientific Reports, 2023 The COVID-19 infection cases have surged globally, causing devastations to both the society and economy. A key factor contributing to the sustained spreading is the presence of a large number of asymptomatic or hidden spreaders, who mix among the ...
Shuhong Huang +5 more
doaj +1 more source
On a Multistable Type of Free Boundary Problem with a Flux at the Boundary
Advances in Mathematical Physics, 2023 This paper studies the free boundary problem of a multistable equation with a Robin boundary condition, which may be used to describe the spreading of the invasive species with the solution representing the density of species and the free boundary ...
Haitao Ren, Jingjing Cai, Li Xu
doaj +1 more source
On a reaction–diffusion–advection system: fixed boundary or free boundary
Electronic Journal of Qualitative Theory of Differential Equations, 2018 This paper is devoted to the asymptotic behaviors of the solution to a reaction–diffusion–advection system in a homogeneous environment with fixed boundary or free boundary.
Ying Xu, Dandan Zhu, Jingli Ren
doaj +1 more source
Resource Allocation in Low Density Spreading Uplink NOMA via Asymptotic Analysis [PDF]
2020 IEEE International Symposium on Information Theory (ISIT), 2020 Low density spreading non-orthogonal multiple- access (LDS-NOMA) is considered where K single-antenna user equipments (UEs) communicate with a base station (BS) over F fading sub-carriers. Each UE k spreads its data symbol over d k k , ∀k as design parameters, we characterize the resource allocation solutions that closely maximize the ergodic mutual ...
Tölli Antti-Heikki +1 more
openaire +2 more sources
Two-dimensional quantum walk under artificial magnetic field [PDF]
, 2015 We introduce the Peierls substitution to a two-dimensional discrete-time quantum walk on a square lattice to examine the spreading dynamics and the coin-position entanglement in the presence of an artificial gauge field.
Gedik, Zafer +2 more
core +2 more sources