Subthreshold domain of bistable equilibria for a model of HIV epidemiology.
Sufficient and necessary condition for the permanence of periodic predator-prey system.
Sum-fuzzy implementation of a choice function using artificial learning procedure with fixed fraction
In one if his paper Luo transformed the problem of sum-fuzzy rationality into artificial learning procedure and gave an algorithm which used the learning rule of perception. This paper extends the Luo method for finding a sum-fuzzy implementation of a choice function and offers an algorithm based on the artificial learning procedure with fixed fraction. We also present a concrete example which uses this algorithm.
Super and subsolutions for elliptic equations on all of .
Supersensitivity for a discrete-time aggregation model.
Support vector machine skin lesion classification in Clifford algebra subspaces
The present study develops the Clifford algebra within a dermatological task to diagnose skin melanoma using images of skin lesions, which are modeled here by means of 5D lesion feature vectors (LFVs). The LFV is a numerical approximation of the most used clinical rule for melanoma diagnosis - ABCD. To generate the we develop a new formula that uses the entries of a 5D vector to calculate the entries of a 32D multivector. This vector provides a natural mapping of the original 5D vector onto...
Sur la signification linguistique de la théorie des catastrophes
Sur la topologie d'un arbre phylogénétique : aspects théoriques, algorithmes et applications à l'analyse de données textuelles
Survival in a two-dimensional Lotka-Volterra system.
Survival maximization for a Laguerre population.
SV40 assembly in vivo and in vitro.
Synchronization for an array of coupled Cohen-Grossberg neural networks with time-varying delay.
Synchronization of cardiorhythm by weak external forcing.
Synchronization of discrete-time stochastic neural networks with random delay.
Synchronization of strongly coupled neural networks.
System matrix computation for iterative reconstruction algorithms in SPECT based on direct measurements
A method for system matrix calculation in the case of iterative reconstruction algorithms in SPECT was implemented and tested. Due to a complex mathematical description of the geometry of the detector set-up, we developed a method for system matrix computation that is based on direct measurements of the detector response. In this approach, the influence of the acquisition equipment on the image formation is measured directly. The objective was to obtain the best quality of reconstructed images with...
Systems of nonlinear delay integral equations modelling population growth in a periodic environment
In this paper we study the existence and uniqueness of positive and periodic solutions of nonlinear delay integral systems of the type
Systems of possibilistic regressions: a case study in ecological inference.
This work introduces how possibilistic regression can be used in the case of non symmetrical triangular membership functions, building a system of regressions, so that suitable restrictions for each particular problem can be incorporated. We apply this methodology to the problem of ecological inference, in particular to the estimation of the electoral transition matrix. An experimentation with several examples shows the benefits of the new approach.
Systems of quasilinear parabolic equations with discontinuous coefficients and continuous delays.