Search
Now showing items 1-10 of 188
Redes convolucionales en comprensión de escenas
(2014-02-17)
Presentamos y aplicamos una técnica de extracción no-supervisada de features de imágenes (Redes Neuronales Convolucionales) al problema de comprensión de escenas. Abarcamos las sutilezas tanto para el diseño como para el ...
Dose point kernel calculation and modelling with nuclear medicine dosimetry purposes
(2014)
Monoclonal labeled antibodies are commonly used for radioimmunotherapy purposes in nuclear medicine. The procedure is based on the deposition of specific radiactivity concentrations on tumoral regions with the aim of ...
Some totally geodesic submanifolds of the nonlinear Grassmannian of a compact symmetric space
(2014)
Let M and N be two connected smooth manifolds, where M is compact and oriented and N is Riemannian. Let E be the Fréchet manifold of all embeddings of M in N, endowed with the canonical weak Riemannian metric. Let ∼ be the ...
Dosimetry optimization system and integrated software (DOSIS) : a comparison against Fluka code results over a standard phantom
(2014)
Actually, dual-imaging facilities allow obtainance of both mass and activity patient-specific distributions perfectly correlated, which are important to improve dose distributions estimations and radioimmunotherapy treatment ...
Experimental determination of <10 10>/ Ψ tilt grain boundary energies in ice
(2014)
Ice grain boundary energies γgb relative to the free surface energy γs were determined by studying the topographic details revealed by plastic replicas of the ice grain boundary groove-free surface with a Laser Confocal ...
Biálgebras infinitesimales de multiplicadores y biálgebras de Lie de derivadores
(2014)
En esta comunicación se estudiarán nuevas estructuras que pueden ser de interés como soporte algebraico de ejemplos conocidos y generalizaciones de estructuras “clásicas”. Estas estructuras son “bi álgebras infinitesimales ...
Strictly positive solutions for one dimensional nonlinear elliptic problems
(2014)
We study the existence and nonexistence of strictly positive solutions for the elliptic problems -- in a bounded open interval, with zero boundary conditions, where -- is a strongly uniformly elliptic differential operator, ...
Weighted inequalities for some integral operators with rough kernels
(2014)
In this paper we study integral operators with kernels K(x, y) = k1(x − A1y)...km(x − Amy), ki(x) = Ωi(x)
|x|n/qi where Ωi : Rn → R are homogeneous functions of degree zero, satisfying a size and a Dini condition, Ai are ...
Modelo de cálculo dosimétríco por convolución de Kernels en presencia de inhomogeneidades
(2014)
El auge de la medicina nuclear tanto en el diagnóstico por imágenes como en los procedimientos terapéuticos, requieren del estudio y desarrollo de nuevas técnicas y métodos en los cálculos dosimétricos con el fin de evaluar ...
Implementation of several mathematical algorithms to breast tissue density classification
(2014)
The accuracy of mammographic abnormality detection methods is strongly dependent on breast tissue characteristics, where a dense breast tissue can hide lesions causing cancer to be detected at later stages. In addition, ...