Resumen: The goal of this paper is to find robust structures for a given main load and its perturbations. In the first part, we show the mathematical formulation of an original variance-expected compliance model used for structural optimization. In the second part, we study the interest of this model on two 3D benchmark test cases and compare the obtained
results with those given by an expected compliance model.
Resumen: This paper focuses on the application of an original global optimization algorithm, based on the hybridization between a genetic algorithm and a semi-deterministic algorithm, for the resolution of various constrained optimization problems for realistic credit portfolios. Results are analyzed from a financial point of view in order to confirm
their relevance.
Resumen: High Pressure (HP) Processing has turned out to be very e®ective in prolonging the shelf life of some food. This paper deals with the modelling and simulation of the e®ect of the combination of high pressure and thermal treatments on food processing, focusing on the inactivation of certain
enzymes. The behavior
and stability of the proposed models are checked by various numerical examples. Furthermore, various simpli¯ed versions of these models are presented and compared with each other in terms of accuracy and computational time. The models developed in this paper provide a useful tool to design suitable industrial equipments and optimize the processes.
Palabras clave: Modelling; sensitivity analysis; food technology; High Pressure; heat and mass transfer; inactivation of enzymes; simulation;Global Optimization; Thermophysical Properties; Kinetic-Parameters; Bacillus-Subtilis; Burgers-Equation; Alpha-Amylase; Temperature;Mathematics, Applied
Resumen: Our aim is to find the optimal trajectory of a pumping ship, used to clean oil spots in the open sea, in order to pump the maximum quantity of pollutant on a fixed time period. We use a model previously developed to simulate the evolution of the oil spots concentration due to the coupling of diffusion, transport from the wind, sea currents and pumping process and
reaction due to the extraction of oil. The trajectory of the ship is directly modeled by considering a finite number of interpolation points for cubic splines. The optimization problem is solved by using a global optimization algorithm based on the hybridization of a Genetic Algorithm with a Semi-Deterministic Secant Method, to improve the population. Finally, we check the efficiency of our approach by solving several numerical examples considering various shapes of oil spots based on real situations.
Resumen: This paper describes how to tackle new challenging coastal engineering problems related to beach erosion with a shape optimization approach. The method modifies the shape of the sea bottom in order to reduce beach erosion effects. Global optimization is shown to be necessary as the related functionals have several
local minima. We describe the physical model used, the proposed protection devices against beach erosion and real case applications.
Palabras clave: Shape design; Global optimization; Water wave propagation; Scattering; Coastal engineering; Beach erosion
