Marcos A ntonio Pereira

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The Lagrangean/surrogate relaxation was explored recently as a faster computational alternative to traditional Lagrangean heuristics. We combine Lagrangean/surrogate relaxation and traditional column generation approaches to accelerate and stabilize primal and dual bounds, through an improved reduced cost selection. The Lagrangean/surrogate multiplier(More)
This paper presents the development of a remote expert system in urological area to support the prostate cancer diagnosis. The prostate cancer is one of the most common cancers among men and the second most frequent death cause by cancer in men. The combination of expert system with the benefits of remote computing allows that several doctors and client(More)
This paper investigates the creation of efficiency measurements structures of decision-making units (DMUs) called Neuro-DEA, by using high-speed optimization modules called Neuro-LP, inspired in the "philosophy" of an unconventional artificial neural network (ANN) and numerical methods. In addition, the linear programming problem LPP is transformed into an(More)
BACKGROUND Keratoconus is a progressive noninflammatory ectatic corneal dystrophy, characterized by corneal thinning and increased curvature with central or paracentral tapered protrusion. Such changes in corneal morphology induce irregular astigmatism and myopia, resulting in visual acuity impairment. This report assesses cases in which keratoconus is not(More)
INTRODUCTION Diabetic macular edema (DME) is the leading cause of vision loss in diabetic individuals, although there are different treatments that can delay this impairment. This complication occurs mainly because of the diabetic retinopathy (DR), a vascular complication of diabetes that frequently is diagnosed and treated later than it should, when the(More)
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