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Volume XVIII, Number 2. 2013

Modeling queueing systems using fuzzy estimators

George N. Botzoris: Democritus University of Thrace

Basil K. Papadopoulos: Democritus University of Thrace

D.S. Sfiris: Democritus University of Thrace

Queuing modeling is the mathematical approach for the analysis of waiting lines. The central problem in every queueing model is a trade-off decision: The manager must weigh the added cost of providing more rapid service against the inherent cost of waiting. In this paper, a new fuzzy approach to queueing…

Particle swarm optimization an alternative for parameter estimation in regression

Sergio G. de-los-Cobos-Silva: Autónoma Metropolitan Iztapalapa University

Antonio Terceño-Gómez: Rovira i Virgili University

Miguel Angel Gutiérrez-Andrade: Autónoma Metropolitan Iztapalapa University

Eric A. Rincón-García: Autónoma Metropolitan Azcapotzalco

Pedro Lara-Velázquez: Autónoma Metropolitan Azcapotzalco

Manuel Aguilar-Cornejo: Autónoma Metropolitan Iztapalapa University

The practice of applying curve fitting techniques to describe data is widespread in many fields: in biology, in medicine, in engineer, in economy, etc. This paper presents a heuristic technique named Particle Swarm Optimization to be used for parameter estimation in regression models. The algorithm was tested on 27 databases…

Relationships between stakeholders and reports using fuzzy relations

Paula A. D´Onofrio: University of Buenos Aires

Inés García Fronti: University of Buenos Aires

The main parameter of the concept of corporate social responsibility is to consider the expectations of different stakeholders (employees, partners, customers, local communities, the environment, shareholders, vendors, etc.) regarding the behavior of companies. Even if a relatively homogeneous group is selected, as in this paper, differences are seen when establishing…

The permanence of the client under uncertain estimations

Ana María Gil Lafuente: University of Barcelona. Faculty of Economics

Mauricio Ortigosa Hernández: Anáhuac University. Faculty of Economics and Business

Marketing has studied the permanence of a client within an enterprise because it is a key element in the study of the value (economic) of the client (CLV). The research that they have developed is based in deterministic or random models, which allowed estimating the permanence of the client, and…

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