708 research outputs found
On a high-dimensional nonlinear stochastic partial differential equation
In this paper we investigate a nonlinear stochastic partial differential
equation (spde in short) perturbed by a space-correlated Gaussian noise in
arbitrary dimension , with a non-Lipschitz coefficient noisy term. The
equation studied coincides in one dimension with the stochastic Burgers
equation. Existence of a weak solution is established through an approximation
procedure
Density estimates on a parabolic spde
We consider a general class of parabolic spde's [formula] with (t, x) [member of] [0, T]×[0, 1] and [epsilon]Wt,x, [epsilon] > 0, a perturbed Gaussian space-time white noise. For (t, x) [member of] (0, T]×(0, 1) we prove the called Davies and Varadhan-Léandre estimates of the density p[epsilon]t,x of the solution u[epsilon]t,x
Large deviations for a fractional stochastic heat equation in spatial dimension driven by a spatially correlated noise
In this paper we study the Large Deviation Principle (LDP in abbreviation)
for a class of Stochastic Partial Differential Equations (SPDEs) in the whole
space , with arbitrary dimension , under random
influence which is a Gaussian noise, white in time and correlated in space. The
differential operator is a fractional derivative operator. We prove a large
deviations principle for our equation, using a weak convergence approach based
on a variational representation of functionals of infinite-dimensional Brownian
motion. This approach reduces the proof of LDP to establishing basic
qualitative properties for controlled analogues of the original stochastic
system.Comment: This paper has been accepted for publication in Stochastics &
Dynamics. This reprint differs from the original in pagination and
typographic detail. arXiv admin note: text overlap with arXiv:1309.1935 by
other author
Adaptive Video Streaming Using TCP Factors Control with User Parameters
AbstractMedia streaming over TCP has become increasingly popular because TCP's congestion control provides remarkable stability to the Internet. Streaming over TCP requires adapting to bandwidth availability and other network parameters in order to have a good users satisfaction. Nowadays the streaming video can be projected on different kind of terminal as tablet, smart phones, laptop.etc. Each device has its own characteristics and parameters which must be taken into consideration on the video streaming adaptation process. In this paper, we propose an adaptive video streaming solution to improve the quality of experience (QoE) of the users by adapting TCP parameters to the user parameters on mobile networks. We validate the models using the ns2 simulator
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