Now showing items 21-30 of 311
SUPERIOR ORDER G -STRUCTURES
G -ESTRUCTURAS DE ORDEN SUPERIOR
In this article we study the basic facts about superior order G-structures, then we show that the set of infinitesimally automorphisms of a geometric G-structure is a closed Lie group.
OPTIMAL PRODUCTION–SALES STRATEGIES FOR A COMPANY AT CHANGING MARKET PRICE
ESTRATEGIAS ÓPTIMAS DE VENTAS Y PRODUCCIÓN PARA UNA COMPAÑÍA EN UN MERCADO CON PRECIOS CAMBIANTES
In this paper we consider a monopoly producing a consumer good of high demand. Its market price depends on the volume of the produced goods described by the Cobb-Douglas production function. A production-sales activity of ...
Special software for computing the special functions of wave catastrophes
Software especial para calcular las funciones especiales de catástrofes de olas
The method of ordinary differential equations in the context of calculating the special functions of wave catastrophes is considered. Complementary numerical methods and algorithms are described. The paper shows approaches ...
NONLINEAR FILTERS TO RECONSTRUCT ELECTROCARDIOGRAM SIGNALS
FILTROS NO LINEALES PARA RECONSTRUIR SEÑALES DE ELECTROCARDIOGRAMAS
ECG signals have been used in cardiac pathology to detect disease heart. The main objective of this paper is to propose signal filtering techniques to reduce noise, extract information, to reconstruct the states and ...
MATHEMATICAL MODEL FOR TOXIN TRANSPORT IN A MARINE FOOD CHAIN
MODELO MATEMÁTICO DEL TRANSPORTE DE UNA TOXINA EN UNA RED TRÓFICA MARINA
Some cases of poisoning by consumption of contaminated fish, like the Ciguatera poisoning, occur unexpectedly and they are not easy to detect previously since the fish that carry the toxin do not have appearance and/or ...
Times of analgesic efficacy of two drugs in the treatment of patients with renal-ureteral colic compared by survival models
Comparación de tiempos de eficacia analgésica de dos fármacos en pacientes con cólico renoureteral empleando modelos de supervivencia
Renourethral colic is a very painful clinical situation that requires a quick diagnosis and treatment. A study was done with patients who were administered two types of analgesics, and whose pain was measured through a ...
An adaptive wavelet-galerkin method for parabolic partial differentia equations
Un método wavelet-Galerkin adaptativo para ecuaciones diferenciales parciales parabólicas
In this paper an Adaptive Wavelet-Galerkin method for the solution of parabolic partial differential equations modeling physical problems with different spatial and temporal scales is developed. A semi-implicit time ...
Fuzzy Regression VS. Ordinary Least Squares Regression: Case Study
Regresión Borrosa VS. Regresión por Mínimos Cuadrados Ordinarios: Caso de Estudio
The objective of this paper is to disseminate the technique of fuzzy regression and to give a practical example of its use. To this end, classical regression is compared to several fuzzy regression models on a problem ...
Optimal Control of Pollution Stock through Ecological Interaction of the Manufacturer and the State
Control Óptimo de Contaminación Almacenada a través de Interacción Ecológica entre el Fabricante y el Estado
A model of an interaction between a manufacturer and the state where the manufacturer produces a single product and the state controls the level of pollution is created and investigated. A local economy with a stock pollution ...
Heuristic for Solving the Multiple Alignment Sequence Problem
Heurística para Solucionar el Problema Alineamiento Múltiple de Secuencias
In this paper we developed a new algorithm for solving the problem of multiple sequence alignment (AM S), which is a hybrid metaheuristic based on harmony search and simulated annealing. The hybrid was validated with the ...