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Convolutive Demixing with Sparse Discrete Prior Models for Markov Sources
Convolutive Demixing Sparse Discrete Prior Models Markov Sources
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2015/9/29
In this paper we present a new source separation method based on dynamic sparse source signal models. Source signals are modeled in frequency domain as a product of a Bernoulli selection variable with...
SOURCE SEPARATION USING SPARSE DISCRETE PRIOR MODELS
SOURCE SEPARATION SPARSE DISCRETE PRIOR MODELS
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2015/9/29
In this paper we present a new source separation method based on dynamic sparse source signal models. Source signals are modeled in frequency domain as a product of a Bernoulli selection variablewith ...
Fast Discrete Curvelet Transforms
2D and 3D Curvelet Transforms Fast Fourier Transforms Unequispaced Fast Fourier Transforms Smooth Partitioning Interpolation Digital Shear Filtering Wrapping
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2015/6/17
This paper describes two digital implementations of a new mathematical transform, namely, the second generation curvelet transform [12, 10] in two and three dimensions. The first digital transformatio...
Convergence of Semi-discrete Stationary Wigner Equation with Inflow Boundary Conditions
Stationary Wigner equation inflow boundary conditions well-posedness
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2014/10/10
Making use of the Whittaker-Shannon interp olation formula w ith shifted sampling p oints, we prop ose in this pap e r a well-p osed semi-discretization of the stationary Wigner equation with inflow B...
Parametric estimation of the driving Lévy process of multivariate CARMA processes from discrete observations
Parametric estimation the driving Lévy process of multivariate CARMA processes discrete observations
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2012/11/23
We consider the parametric estimation of the driving L\'evy process of a multivariate continuous-time autoregressive moving average (MCARMA) process, which is observed on the discrete time grid $(0,h,...
Eigenstructure of the discrete Laplacian on the equilateral triangle: The Dirichlet & Neumann problems
equilateral triangle discrete Laplacian eigenvalues/eigenvectors
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2010/11/1
Lam´e’s formulas for the eigenvalues and eigenfunctions of the continuous Laplacian on an equilateral triangle under Dirichlet and Neumann boundary conditions are herein extended to the discrete...
The discrete time-cost-quality trade-off problem using a novel hybrid genetic algorithm
Time cost quality trade-off Project scheduling
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2010/9/26
Time, cost and quality are among the major objectives of any project .In recent years, the demands of project stakeholders regarding reductions in the total cost and time of a project along with achie...
Explicit Runge-Kutta time integrators for one dimensional spatially discrete semilinear parabolic equation
Semilinear parabolic equation Runge-Kutta methods
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2010/9/26
Explosive instabilities in two uniform spatially discrete schemes for a semilinear parabolic equation in one space dimension are studied by intensive numerical simulations. We shows for both schemes t...
More than discrete or continuous: a bird's view
discrete or continuous bird's view
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2010/11/23
I try to give mathematical evidence to the following equivalence, which is based on ideas from Plato (Timaeus): reality emerges from a more primitive, non-geometrical, reality in the same way as the ...
Discrete dynamics in implicit form
Discrete dynamics math
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2010/11/22
An algorithm for extracting the integrable part (backward or/and forward) of an implicit difference equation is formulated. We prove that Discrete Lagrangian dynamics on Lie groupoids may be describe...
Non-local PDEs with discrete state-dependent delays: well-posedness in a metric space
Non-local PDEs discrete state-dependent delays metric space
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2010/11/17
Partial differential equations with discrete (concentrated) state-dependent delays are studied. The existence and uniqueness of solutions with initial data from a wider linear space is proven first a...
Stability analysis for linear time-delay systems described by fractional parameterized models possessing multiple internal constant discrete delays
Stability analysis linear time-delay systems described fractional parameterized models possessing multiple internal
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2010/9/13
This paper discusses linear fractional representations (LFR) of parameter-dependent nonlinear systems with real-rational nonlinearities and point-delayed dynamics. Sufficient conditions for robust glo...
On the tolerable perturbed initial states: Discrete systems
Asymptotic stability continuous systems
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2010/9/10
Consider the output signal y(i) = Cx(i) of a linear discrete system described by x(i+1) = Ax(i) where x(0) = x0. Given a tolerance index ρ, we say that a perturbation ω is ρ-tolerable if yω(i)−...
Robust H_\infty disturbance attenuation for uncertain discrete-time systems with time-varying delay
Delay systems discrete-time systems
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2010/9/14
This paper discusses robust H∞ disturbance attenuation of uncertain discrete-time systems that have time-varying delay in state. There have been only a few results on H∞ disturbance attenuation for di...
A Simplicial Approach for Discrete Fixed Point Theorems
Sperner’s lemma Fixed point theorem Direction-preserving map Simplicial structure
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2012/11/30
We present a new discrete fixed point theorem based on a variation of the direction-preserving maps over simplicial structures. We show that the result is more
general than the recent discrete fixed ...