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Quantitative biostratigraphic model for the tertiary of the lower Magdalena Basin, Colombian Caribbean
(Ecopetrol, 2006-01-01)
The reinterpretation of biostratigraphic information by new models and quantitative correlation techniques substantially improves its resolution and its correlative potential, thus minimizing oil exploration risks. With ...
Three-dimensional surface contouring of macroscopic objects by means of phase-difference images
(OSA, 2006-04-16)
We report a technique to determine the 3D contour of objects with dimensions of at least 4 orders of magnitude larger than the illumination optical wavelength. Our proposal is based on the numerical reconstruction of the ...
Multirate control of an unmanned aerial vehicle
(World Scientific and Engineering Academy and Society (WSEAS) Press, 2005-01-01)
The application of multirate sampling to the control of an unmanned aerial vehicle (a mini-helicopter robot) using CACSD tools, developed specially for that goal, is presented. Multirate control is tested via simulation ...
Control and parameter estimation of a mini-helicopter robot using rapid prototyping tools
(World Scientific and Engineering Academy and Society (WSEAS) Press, 2006-01-01)
This paper shows the control and parameter estimation of a mini-helicopter robot using a rapid prototyping environment based on Matlab/Simulink. The parameter estimation task is facilitated by the availability of a block-based ...
The epidemic threshold theorem with social and contact heterogeneity
(SPIE-INT SOC OPTICAL ENGINEERING, 2008-03-17)
The threshold theorem of an epidemic SIR model was compared when infectious and susceptible individuals have homogeneous mixing and heterogeneous social status and when individuals of random networks have contact heterogeneity. ...
Epidemic thresholds in SIR and SIIR models applying an algorithmic method
(SPRINGER, 2008-01-01)
Epidemic thresholds were deduced and simulated from SIR models of Susceptible - Infected - Recovered individuals, through local stability analysis of the disease free and endemic equilibrium, with an algorithmic method. ...
Mathematical model for dengue with three states of infection
(SPIE-INT SOC OPTICAL ENGINEERING, 2012-01-01)
A mathematical model for dengue with three states of infection is proposed and analyzed. The model consists in a system of differential equations. The three states of infection are respectively asymptomatic, partially ...
Declarative debugging of functional logic programs
(Elsevier BV, 2001-01-01)
We present a general framework for the declarative debugging of functional logic programs, which is valid both for eager as well as lazy programs. We associate to our programs a semantics based on a (continuous) immediate ...
Phase-difference images by digital holography applied to 3D surface contouring
(Academia Colombiana de Ciencias Exactas Físicas y Naturales, 2005-06)
The problem to determine the 3D-contour of objects with all sizes and shapes is a hot topic in diverse fields of optical research and engineering. Through the use of the numerical reconstruction of digital recorded holograms, ...
Analytical solution for transient flow of a generalized bingham fluid with memory in a movable tube using computer algebra
(SPRINGER, 2007-01-01)
A rheological linear model for a certain generalized Bingham fluid with rheological memory, which flows in a movable tube is proposed and analytically solved. The model is a system of two linear and coupled partial ...
