Browsing 5.Artículos de publicaciones periódicas by Issue Date
Now showing items 120 of 103

Optimal control of a batch bioreactor: a study on the use of an imperfect model
(2001)"This paper presents a numerical study on the performance degradation of a batch bioreactor optimal control strategy when the model used to compute such strategy shows wide variations from the real process. The optimal ... 
An inference engine based on fuzzy logic for uncertain and imprecise expert reasoning
(2002)"This paper addresses the development and computational implementation of an inference engine based on a full fuzzy logic, excluding only imprecise quantifiers, for handling uncertainty and imprecision in rulebased expert ... 
The evolutionary minority game with local coordination
(2003)"We discuss a modification of the evolutionary minority game (EMG) in which agents are placed in the nodes of a regular or a random graph. A neighborhood for each agent can thus be defined and a modification of the usual ... 
Doubly periodic dispersion maps for 10 and 40 Gbit/s ultralonghaul transmission
(2004)"Optical transmission employing doubly periodic dispersion maps at 10 and 40 Gbit/s data rates is reported. The implications of these transmission results in providing added degrees of flexibility in network design, in ... 
Learning and imitation: transitional dynamics in variants of the BAM
(2004)"We study the dynamics of selforganized systems when disturbed by shocks. For this purpose, we consider extensions of the “Bar Attendance Model” [1] (BAM), which provides a stylized setting for the analysis of the emergence ... 
Performance of nonfibre based dispersion compensation for longhaul 10.7 Gbit/s DWDM transmission
(2004)"Nonfibre based inline dispersion compensation is employed to achieve longhaul transmission of 80 channels at 10.7 Gbit=s bit rate over 1200 km of LEAF fibre. Average system margins of more than 4 dB and small transmission ... 
Order and disorder in the local evolutionary minority game
(2005)"We study a modification of the Evolutionary Minority Game (EMG) in which agents are placed in the nodes of a regular or a random graph. A neighborhood for each agent can thus be defined and a modification of the usual ... 
Stochastic resonance and brownian ratchets
(2005)"We discuss the connections between Brownian ratchets (BR) and stochastic resonance (SR). We consider a periodic potential energy landscape with no left–right symmetry that is driven by an external force which can be ... 
Foundations and applications for secure triggers
(2005)"Imagine there is certain content we want to maintain private until some particular event occurs, when we want to have it automatically disclosed. Suppose furthermore, that we want this done in a (possibly) malicious host. ... 
Uncertainty relation for the optimization of opticalfiber transmission systems simulations
(2005)“The mathematical inequality which in quantum mechanics gives rise to the uncertainty principle between two non commuting operators is used to develop a spatial stepsize selection algorithm for the SplitStep Fourier ... 
Uniform stability properties of switched systems with switchings governed by digraphs
(2005)"Characterizations of various uniform stability properties of switched systems described by differential inclusions, and whose switchings are governed by a digraph, are developed. These characterizations are given in ... 
Impact of DCF properties on system design
(2006)"The dispersioncompensating ﬁber is an important optical element of current and future optical networks. In this paper, we review the impact that various properties of dispersioncompensating ﬁbers has on the performance ... 
Learning by knowledge sharing in autonomous intelligent systems
(2006)"Very few learning systems applied to problem solving have focused on learning operator definitions from the interaction with a completely unknown environment. In order to achieve better learning convergence, several agents ... 
An extension of LaSalle’s invariance principle for switched systems
(2006)"This paper addresses invariance principles for a certain class of switched nonlinear systems. We provide an extension of LaSalle’s Invariance Principle for these systems and state asymptotic stability criteria. We also ... 
Why nestedness in mutualistic networks?
(2007)"We investigate the relationship between the nested organization of mutualistic systems and their robustness against the extinction of species. We establish that a nested pattern of contacts is the best possible one as far ... 
Piet: a GISOLAP implementation
(2007)"Data aggregation in Geographic Information Systems (GIS) is a desirable feature, although only marginally present in commercial systems, which also fail to provide integration between GIS and OLAP (On Line Analytical ... 
Time delay properties of stochasticsresonance information transmission line
(2008)"In this paper we analyze the properties of a chain of forwardcoupled bistable overdamped oscillators. It is well known that this system displays stochastic resonance and behaves as a transmission line when an adequate ... 
Two classes of bipartite networks: nested biological and social systems
(2008)"Bipartite graphs have received some attention in the study of social networks and of biological mutualistic systems. A generalization of a previous model is presented, that evolves the topology of the graph in order to ... 
Microfluidic device concept based on microoscillator dynamics at a liquid–liquid interface
(2008)"Oscillating microbeams and microplates have been used extensively as sensing components for property detection in fluids. In liquids, their quality factor Q is drastically decreased, thus affecting a microsensor’s resolution. ... 
Causality study and numerical response of the magnetic permeability as a function of the frequency of ferrites using Kramers–Kronig relations
(2008)"In this paper, the numerical treatment of magnetic loss of NiZn, MnZn, Ni2Y, and NiZnCu ferrite and their composites, by using Krameres–Kronig relations, is investigated. The complex magnetic permeability spectra for ...