Results 41 to 50 of about 1,382,256 (139)

Uso de modelos matemáticos para la descripción del crecimiento de tumores cancerosos

open access: yesNOVA, 2010
La producción de tumores cancerosos o tumorgénesis ha sido estudiada desde principios del siglo XX por matemáticos y físicos interesados en aplicaciones biológicas.
Jair Zapata Peña, Alba Cristina Ortiz
doaj   +1 more source

Evaluación de la gestión financiera usando variables latentes en modelos estocásticos de fronteras eficientes

open access: yes, 2016
It is impossible to ascertain the quality of business Management through traditional financial indicators; these alone do not accurately infer about business states in such important aspects as the efficiency of business management.
M. Cárdenas, J. A. Morales
semanticscholar   +1 more source

Introducción a las dinámicas caóticas en la teoría de los ciclos económicos

open access: yesLecturas de Economía, 2010
Al intentar describir las trayectorias irregulares observables empíricamente en las variables económicas, la teoría de los ciclos económicos, ha utilizado desde comienzos de la década de 1980 modelos de ciclos económicos que implementan la teoría del ...
Medardo Restrepo
doaj   +1 more source

ANÁLISIS DEL RENDIMIENTO DE SISTEMAS HÍDRICOS EN DESARROLLO MEDIANTE EL ACOPLE DE MODELOS ESTOCÁSTICOS HIDROLÓGICOS Y OPTIMIZACIÓN DE REDES DE FLUJO

open access: yes, 2016
This study presents a methodology for analyzing the performance of water resources systems through a coupling stochastic models and models of optimization, with the aim of having a support tool for planning and management of supply and demand for water ...
A. Avilés, A. Solera, J. Paredes
semanticscholar   +1 more source

Routine results of an algorithm for managing the production of blood components

open access: yesVox Sanguinis, Volume 119, Issue 6, Page 541-547, June 2024.
Abstract Background and Objectives The variability in the number of donations together with a growing demand for platelet concentrates and plasma‐derived medicines make us seek solutions aimed at optimizing the processing of blood. Some mathematical models to improve efficiencies in blood banking have been published.
Ana Isabel Pérez‐Aliaga   +7 more
wiley   +1 more source

Transporte de solutos em diferentes cenários geológicos gerados por modelos estocásticos de cadeias de Markov

open access: yes, 2017
The understanding of subsurface contaminants behavior is critical for the quantification of human health risk and planning of active remediation. Since the prediction reliability of plume behavior is related to lithological variability in subsurface ...
E. Teramoto   +2 more
semanticscholar   +1 more source

Pressure from insect‐resistant maize on protected butterflies and moths

open access: yesConservation Biology, Volume 38, Issue 2, April 2024.
Abstract Intensification in agriculture affects many insect species, including butterflies. Insect‐resistant crops, such as Bt (Bacillus thuringiensis) maize, which produces a toxin active against Lepidoptera, are an alternative to insecticide sprays.
Mathias Otto   +2 more
wiley   +1 more source

Incorporación de los efectos de erupciones volcánicas en modelos estocásticos de precipitación en cuencas hidrográficas. Caso del volcán Tungurahua en la microcuenca del río Ambato

open access: yes, 2016
[EN] Summary Water is a determining factor in all aspects of human life and the balance and integrity of the natural environment. Water is a vital natural resource and it is imperative to deepen research that allow us to understand what factors could ...
Iván Alfredo Ríos García
semanticscholar   +1 more source

Estimating biocontrol agent spread: A case study using introduced dung beetles

open access: yesEcological Entomology, Volume 49, Issue 1, Page 91-105, February 2024.
The average rate of spread varied between species from a high of ca. 79 km/year (E. intermedius) to a low of 28 km/year (Ont. taurus). The area of spread varied between 99,175 km2 and 34,175 km2, and abundance varied from 88,100 beetles/km2 to 4,189 beetles/km2.
Marcela Del Carmen Vieira   +5 more
wiley   +1 more source

Um modelo estocástico combinado de previsão sazonal para a precipitação no Brasil A combined stochastic model for seasonal prediction of precipitation in Brazil

open access: yesRevista Brasileira de Meteorologia, 2010
Este artigo discute um modelo de previsão combinada para a realização de prognósticos climáticos na escala sazonal. Nele, previsões pontuais de modelos estocásticos são agregadas para obter as melhores projeções no tempo. Utilizam-se modelos estocásticos
Paulo Sérgio Lúcio   +11 more
doaj   +1 more source

Home - About - Disclaimer - Privacy