Results 241 to 250 of about 3,595 (260)

Asymptotics of generalized depth-based spread processes and applications

Journal of Multivariate Analysis, 2019
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Asymptotic bounds on the Optimum Multiuser Efficiency of randomly spread CDMA

2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt), 2014
We derive some bounds on the Optimum Asymptotic Multiuser Efficiency (OAME) of randomly spread CDMA as extensions of the result by Tse and Verdu. To this end, random Gaussian and random binary antipodal spreading are considered. Furthermore, the input signal is assumed to be Binary Phase Shift Keying (BPSK).
Mohammad Ali Sedaghat, Ralf R. Müller, Farokh Marvasti   +2 more
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Global asymptotic stability for a vector disease model with spatial spread

Journal of Mathematical Biology, 1980
We analyze the global behaviour of a vector disease model which involves spatial spread and hereditary effects. This model can be applied to investigate growth and spread of malaria. No immunization is considered. We prove that, if the recovery rate is less than or equal to a threshold value, the disease dies out, otherwise the infectious people ...
MARCATI, PIERANGELO, Pozio M. A.
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Analytic spread and non-vanishing of asymptotic depth

Mathematical Proceedings of the Cambridge Philosophical Society, 2017
AbstractLetSbe a polynomial ring over a fieldKof characteristic zero and letM⊂Sbe an ideal given as an intersection of powers of incomparable monomial prime ideals (e.g., the case whereMis a squarefree monomial ideal). In this paper we provide a very effective, sufficient condition for a monomial prime idealP⊂ScontainingMbe such that the ...
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The Asymptotic Speed of Spread and Traveling Waves for a Vector Disease Model

Journal of Dynamics and Differential Equations, 2006
The authors study a host-vector model for a disease without immunity in which the current density of infections is related to the number of infectious hosts at earlier times. This model takes form of the following time-delayed integro-differential equation \[ \frac{\partial u}{\partial t}(t,x) = d\Delta u(t,x) -au(t,x) + b(1-u(t,x))\int_{-\infty}^{t ...
Zhao, Xiao-Qiang, Xiao, Dongmei
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Acquisition in direct-sequence spread-spectrum communication networks: an asymptotic analysis

IEEE Transactions on Information Theory, 1993
The effect of multiple-access interference on the acquisition of direct-sequence spread-spectrum (DS/SS) signals is studied. A passive matched filter approach is used, and the acquisition window length, which is the length of the matched filter, determines the complexity of the acquisition scheme.
Upamanyu Madhow, Michael B. Pursley
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Asymptotics of an estimator of a robust spread functional

1996
Summary: The functional \(S(F)= \text{med}_{X\sim F} (\text{med}_{Y\sim F} |X-Y |)\) proposed by \textit{P. J. Rousseeuw} and \textit{C. Croux} [J. Am. Stat. Assoc. 88. No. 424, 1273-1283 (1993; Zbl 0792.62025)] exists for any distribution \(F\), because no moments are needed.
Hössjer, O., Croux, C., Rousseeuw, P.J.
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Global Dynamics and Asymptotic Spreading Speeds for a Partially Degenerate Epidemic Model with Time Delay and Free Boundaries

Journal of Dynamics and Differential Equations, 2021
Qiaoling Chen, Fengquan Li, Zhidong Teng   +2 more
exaly  

Asymptotic spreading for Fisher-KPP reaction-diffusion equations with heterogeneous shifting diffusivity

Discrete and Continuous Dynamical Systems - Series S, 2021
Gregory Faye, Thomas Giletti, Matt Holzer   +2 more
exaly  

Asymptotic spreading speeds for a predator–prey system with two predators and one prey

Nonlinearity, 2021
Arnaud Ducrot, Thomas Giletti, Jong-Shenq Guo   +2 more
exaly