In this paper, we are concerned with the design of a hybrid resolution framework including genetic algorithms and constraint propagation to solve the balanced academic curriculum problem. We develop a theoretical model in which hybrid resolution can be achieved as the computation of a fixpoint of elementary functions. These functions correspond to basic resolution techniques and their applicati...

Egenhofer's nine-intersection, well-known for vector representations, is de ned here on a raster, using a hybrid raster model, and then systematically transformed to yield functions which can be used in a convolution operation applied to a regular raster representation. Applying functions, the hybrid raster elements need not be stored. It becomes thus possible to determine the topological relat...

This paper presents a multi-input single-phase grid-connected inverter for a hybrid photovoltaic (PV)/wind power system, integrated with basic and advanced functions developed by the authors. To achieve high quality current and fast dynamic response to inherent variations of hybrid renewable energy sources, an improved space vector pulse-width-modulation (PWM) based predictive current control a...

In this paper we introduce the notion of hybrid trigonometric parametrization as a tuple of real rational expressions involving circular and hyperbolic trigonometric functions as well as monomials, with the restriction that variables in each block of functions are different. We analyze the main properties of the varieties defined by these parametrizations and we prove that they are exactly the ...

Classical gradient methods and evolutionary algorithms represent two very different classes of optimization techniques that seem to have very different properties. This paper discusses some aspects of some “obvious” differences and explores to what extent a hybrid method, the evolutionary-gradient-search procedure, can be used beneficially in the field of continuous parameter optimization. Simu...

The aim of the present paper is to associate a new symmetric boundary integral method to well known symmetric domain methods with the purpose of improving solutions of multi-eld problems with coupled boundary and domain methods. From a single-eld variational principle for a 3D linear, elastodynamic state a three-eld hybrid principle is developed by Hamiltons principle and decoupling displacemen...