, . actiristics and constraint alritudes. Conditions which favor significant improvdent are: large thrust reserve at the constraint altitude, reasonably high lift-to-drag ratio, low constraint altitude, and low wing loading. The trajectory optimization algorithm, which is described in some detail, is especially efficient and may be useful in other applications. Wing area Time, (scaled) Thrust, ...

Properties of starburst-driven outflows in dwarf galaxies are compared to those in more massive galaxies. Over a factor of ∼ 10 in galactic rotation speed, supershells are shown to lift warm ionized gas out of the disk at rates up to several times the star formation rate. The amount of mass escaping the galactic potential, in contrast to the disk, does depend on the galactic mass. The temperatu...

OPTIMAL SHAPE DESIGN OF AERODYNAMIC CONFIGURATIONS: A NEWTON-KRYLOV APPROACH Marian Nemec Doctor of Philosophy Graduate Department of Aerospace Science and Engineering University of Toronto 2003 Optimal shape design of aerodynamic configurations is a challenging problem due to the nonlinear effects of complex flow features such as shock waves, boundary layers, ...

1. Abstract This paper deals with the optimization of shape of aerodynamic profiles. The objective is to reduce the drag coefficient on a given airfoil while preserving the lift coefficient within acceptable ranges. A set of control points defining the geometry are passed and parameterized as a B-Spline curve. These points are modified automatically by means of CFD analysis. A given shape is de...

This paper proposes a new method of genetic algorithms (GAs) for dicrete optimization problems. For continuous problems, it has been reported that parallel distributed genetic algorithms (PDGAs) show higher performance than conventional GAs. But, for discrete optimization problems, the performance of PDGAs has not been clearly. We examine the performance of conventional GAs, distributed GAs, an...

Oil production is a complex technological process that requires significant electricity consumption. The main consumers in oil and gas workshops are artificial lift facilities. Currently, among the objects of mechanized mining, installations electric submersible pumps widespread. When planning modes, it necessary to be able assess change power consumption parameters when changing parameters. pa...

Using a surrogate model to evaluate the expensive fitness of candidate solutions in an evolutionary algorithm can significantly reduce the overall computational cost of optimization tasks. In this paper we analyze the convergence profiles of a multi-element high-lift system, revealing insights into the flow physics of the system and how CL varies for different numbers of flow iterations. A hybr...