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Spreading speeds for time heterogeneous prey–predator systems with diffusion
Nonlinear Analysis: Real World Applications, 2023zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Ducrot, Arnaud, Jin, Zhucheng
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2019
When a population can persist in a certain environment, we expect that it will spread through that environment if it is initially spatially confined to some small region. How fast will this spatial spread occur? How does the speed depend on movement behavior? These questions are particularly relevant for understanding and managing biological invasions.
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When a population can persist in a certain environment, we expect that it will spread through that environment if it is initially spatially confined to some small region. How fast will this spatial spread occur? How does the speed depend on movement behavior? These questions are particularly relevant for understanding and managing biological invasions.
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Spreading speeds and traveling waves in competitive recursion systems
Journal of Mathematical Biology, 2010This paper is concerned with the spreading speeds and traveling wave solutions of discrete time recursion systems, which describe the spatial propagation mode of two competitive invaders. We first establish the existence of traveling wave solutions when the wave speed is larger than a given threshold.
Lin, Guo, Li, Wan-Tong, Ruan, Shigui
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Minimal wave speed and spread speed of competing pioneer and climax species
Applicable Analysis, 2014In this article, for a diffusive population model describing interaction of pioneer-climax species, we explore the issues of spreading speed, linear determinacy and traveling wave fronts. Applying the theory developed by Weinberger et al. [J. Math. Biol.
Peixuan Weng, Xingfu Zou
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Estimating the Persistent Spreads in High-Speed Networks
2014 IEEE 22nd International Conference on Network Protocols, 2014The persistent spread of a destination host is the number of distinct sources that have contacted it persistently in predefined t measurement periods. A persistent spread estimator is a software/hardware component on a router that inspects the arrival packets and estimates the persistent spread of each destination.
Qingjun Xiao +3 more
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A high-speed correlator for spread spectrum applications
International Journal of Electronics, 1992This paper presents the design of a high-speed digital correlator implemented in a Xilinx field programmable gate array. The theoretical maximum operating frequency of the digital correlator is calculated and simulated to be 40 MHz, a significant speed improvement over commercially available correlators.
RAYMOND B. CHADWICK, JOHN D. CARPINELLI
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Asymptotic Speeds of Spread for a Nonlocal Diffusion Equation
Journal of Dynamics and Differential Equations, 2016The author studies the spatial spreading dynamics of a class of nonlocal diffusion equation \[ {u_t}(t,x) = (J * u - u)(t,x) + f(u,G * * S(u))(t,x), \] where \(t \geq 0\), \(x \in \mathbb R\) and \(J \in {L^1}(\mathbb R)\) is a nonnegative symmetric kernel function.
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Spreading Speeds of Time-Dependent Partially Degenerate Reaction-Diffusion Systems
Chinese Annals of Mathematics, Series B, 2022zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Collimation of High-speed Flow with Thermal Spread Losses
AIAA Journal, 1979The operation of the neutral beam collimator designed for the mass spectrometer inlet system of the Space Shuttle Induced Environment Contamination Monitor system is discussed. The collimator will allow selective views of a 10 deg half-angle conical volume of space so that backscattered molecules from within this volume can be measured and related to ...
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Sound speed, pulse spreading and reverberation in muddy bubbly sediments
Proceedings of Meetings on Acoustics, 2011The sound speed characteristic of the high-porosity mud has been found to have sonic speeds lower than expected. Since the presence of bubbles is known to be an important factor in decreasing the sound speed, these low sound speeds are attributed to methane microbubbles that result from biological decay.
William M. Carey, Allan D. Pierce
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