Results 11 to 20 of about 655 (137)

On Partial Stochastic Comparisons Based on Tail Values at Risk

open access: yesMathematics, 2020
The tail value at risk at level p, with p ∈ ( 0 , 1 ) , is a risk measure that captures the tail risk of losses and asset return distributions beyond the p quantile. Given two distributions, it can be used to decide which is riskier.
Alfonso J. Bello   +3 more
doaj   +1 more source

An Inventory Model with Stock-Dependent Demand Rate and Maximization of the Return on Investment

open access: yesMathematics, 2021
This work presents an inventory model for a single item where the demand rate is stock-dependent. Three fixed costs are considered in the model: purchasing cost, ordering cost and holding cost.
Valentín Pando   +2 more
doaj   +1 more source

Puntos de servicio en aseos públicos para minimizar y equilibrar los tiempos de espera de hombres y mujeres

open access: yesInformes de la Construccion, 2017
Se plantea el problema de las colas que se presentan habitualmente en los aseos de señoras en contraste con la fluidez con que se accede a los de caballeros, considerando que esta situación tiene solución ya que es sólo debida al mal dimensionado de los ...
P. Grima   +2 more
doaj   +1 more source

Using First-Passage Times to Analyze Tumor Growth Delay

open access: yesMathematics, 2021
A central aspect of in vivo experiments with anticancer therapies is the comparison of the effect of different therapies, or doses of the same therapeutic agent, on tumor growth.
Patricia Román-Román   +3 more
doaj   +1 more source

A Bayesian Model of COVID-19 Cases Based on the Gompertz Curve

open access: yesMathematics, 2021
The COVID-19 pandemic has highlighted the need for finding mathematical models to forecast the evolution of the contagious disease and evaluate the success of particular policies in reducing infections.
Ángel Berihuete   +2 more
doaj   +1 more source

Un frailty aditivo en modelos de supervivencia bivariante

open access: yesRevista de Matemática: Teoría y Aplicaciones, 2009
Bivariate survival models based on the presence of an unobseved random covariate, grailty, tend to assume a proportional hazard hypothesis. A bivariate survival model is constructed.
Esteban Navarrete Álvarez   +2 more
doaj   +1 more source

Deciphering Genomic Heterogeneity and the Internal Composition of Tumour Activities through a Hierarchical Factorisation Model

open access: yesMathematics, 2021
Genomic heterogeneity constitutes one of the most distinctive features of cancer diseases, limiting the efficacy and availability of medical treatments.
José Carbonell-Caballero   +3 more
doaj   +1 more source

Two Stochastic Differential Equations for Modeling Oscillabolastic-Type Behavior

open access: yesMathematics, 2020
Stochastic models based on deterministic ones play an important role in the description of growth phenomena. In particular, models showing oscillatory behavior are suitable for modeling phenomena in several application areas, among which the field of ...
Antonio Barrera   +2 more
doaj   +1 more source

Some Notes about Inference for the Lognormal Diffusion Process with Exogenous Factors

open access: yesMathematics, 2018
Different versions of the lognormal diffusion process with exogenous factors have been used in recent years to model and study the behavior of phenomena following a given growth curve.
Patricia Román-Román   +2 more
doaj   +1 more source

Gene Set Analysis Using Spatial Statistics

open access: yesMathematics, 2021
Gene differential expression consists of the study of the possible association between the gene expression, evaluated using different types of data as DNA microarray or RNA-Seq technologies, and the phenotype.
Angela L. Riffo-Campos   +2 more
doaj   +1 more source

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