Mostrando ítems 1-20 de 35

• #### A discrete-time queueing system with three different strategies ﻿

(Elsevier, 2021-09)
We consider a discrete-time Geo/G/1/inf system in which a customer that finishes its first essential service may opt to abandon the system, to receive a second optional service or to go at the head of the queue in order ...
• #### A Genetic Algorithm and an Exact Algorithm for Classifying the Items of a Questionnaire Into Different Competences ﻿

(2014-07-16)
A Likert scale is a psychometric response scale primarily used in questionnaires to obtain participant's preferences or degree of agreement with a statement or set of statements. Respondents are asked to indicate their ...
• #### A Non Markovian Retrial Queueing System ﻿

(2022-06-13)
Researches on retrial queues with non-geometrical retrial times is motivated by real computers and telecommunication networks, where retrial times can hardly be geometrical distributed. The inherent difficulty with ...
• #### A Portable Knowledge Based System for Car Breakdown Evaluation ﻿

(2014-07-16)
Desarrollo de un sistema experto para ayudar a conductores a tomar decisiones en el caso que se encienda alguna luz en el salpicadero.
• #### A RBES for Generating Automatically Personalized Menus ﻿

(2016-07-14)
Food bought at supermarkets in, for instance, North America or the European Union, give comprehensive information about ingredients and allergens. Meanwhile, the menus of restaurants are usually incomplete and cannot be ...
• #### A stepwise Cas course for solving First-Order Partial Diferential Equations ﻿

(2014-07-16)
Partial Differential Equations (PDE) is a very important topic in advance Mathematics for Engineering. The three main first-order PDE problems that a basic course must deal with are: \begin{enumerate} \item {\bf Pfaff ...
• #### Advanced techniques to compute improper integrals using a CAS ﻿

(2014-07-16)
Let us consider the following types of improper integrals: $$\int_0^\infty f(t)\:{\rm d}t \qquad ; \qquad \int_{-\infty}^0 f(t)\:{\rm d}t \qquad {\rm and} \qquad \int_{-\infty}^\infty f(t)\:{\rm d}t$$ \medskip Let ...
• #### An Accelerated-Time Simulation for Traffic Flow in a Smart City ﻿

(2013-09-17)
• #### An Approach to Overtaking Station Layout Diagram Design Using Graphs ﻿

(2020-07-24)
The authors have approached in the past different railway engineering problems (e.g. [1,2]) and have developed software for the Spanish Railway Foundation [3], mainly using computer algebra systems (CAS). Now a CAS is used ...
• #### Comparing and Tuning Machine Learning Algorithms to Predict Type 2 Diabetes Mellitus ﻿

(2022-06-13)
The main goals of this work is to study and compare machine learning algorithms to predict the development of type 2 diabetes mellitus. Four classifi cation algorithms have been considered, studying and comparing the ...
• #### Computer Algebra-based RBES personalized menu generator ﻿

(2015-07-27)
People have many constraints concerning the food they eat. These constraints can be based on religious believes, be due to food allergies or to illnesses, or can be derived just from personal preferences. Therefore, ...
• #### A Discrete-time Queueing System With Imperfect Information for the Server ﻿

(2020-07-24)
We consider a discrete-time Geo=G=1=1 system in which a customer that finishes its fi rst essential service may opt to abandon the system, to receive a second optional service or to place at the head of the queue in order ...
• #### EDUMATICUS: EDUcación MATemática con TIC en Universidad y Secundaria ﻿

(2022-07)
El objectivo principal de esta comunicación es presentar la actividad del grupo EDUMATICUS, EDUcación MATemática con TIC en Universidad y Secundaria, cuyo objetivo principal es elaborar materiales multimedia que sirvan ...
• #### Estimating radial railway network improvement with a CAS ﻿

(2013-09-17)
The Spanish railway network is very complex, with two different track gauges: the broad classic Iberian track gauge and the so called international gauge, the latter used in the extensive high speed network. All new lines ...
• #### A fast functional approach to personalized menus generation using set operations ﻿

(2018-06-14)
The authors developed some time ago a RBES devoted to preparing personalized menus at restaurants according to the allergies, religious constraints, likes and other diet requirements as well as products availability. A ...
• #### Improving CAS Capabilities: New Rules for Computing Improper Integrals ﻿

(2016-07-14)
There are diferent applications in Engineering that require to compute improper integrals of the first kind (integrals defined on an unbounded domain) such as: the work required to move an object from the surface of the ...
• #### Introducing probabilistic celular automata. A versatile extension of Game of Live ﻿

(2018-06-14)
The "Game of life" model was created in 1970 by the mathematician Jonh Horton Conway using cellular automata. Since then, di erent extensions of these cellular automata have been used in many applications, such as car ...
• #### Making more flexible ATISMART+ model for traffic simulations using a CAS ﻿

(2015-07-28)
Traffic simulations usually require the search of a path to join two different points. Dijkstra’s algorithm [1] is one of the most commonly used for this task due to its easiness and quickness. In [2, 3] we developed an ...
• #### New functions for random samples generation using Stata 15 ﻿

(2019-10-30)
In the 2017 Spanish Stata Users Group meeting, held in Madrid on October 19th, we introduced some functions for generating random samples from continuous and discrete distributions using STATA 13. In this talk, we will ...
• #### New rules for improving CAS capabilities when computing improper integrals. Applications in Math Education ﻿

(2018-06-22)
In many Engineering applications the computation of improper integrals is a need. In [1] we pointed out the lack of some CAS when computing some types of improper integrals. Even more, the work developed showed that some ...