Enhanced Nonlinear Iterative Techniques Applied to a Nonequilibrium Plasma Flow

Nonlinear Optimal Control Techniques Applied to a Launch Vehicle Autopilot

This paper presents an application of the nonlinear optimal control techniques to the design of launch vehicle autopilots. The optimal control is given by the solution to the Hamilton-Jacobi-Bellman (HJB) equation, which in this case cannot be solved explicity. A method based upon Successive Galerkin Approximation (SGA), is used to obtain an approximate optimal solution. Simulation results invo...

Optical flow techniques applied to video coding

Motion estimation is an important part of most video coding schemes because it enables us to exploit the high degree of temporal redundancy present. Though block matching algorithms (BMA) yield coarse and piecewise-constant elds, they are very popular due to their simplicity and low bit overhead. In this paper, we propose to use a more advanced gradient-based technique to overcome the disadvant...

Convergence of iterative methods applied to Burgers-Huxley equation

Structure-selection techniques applied to continuous-time nonlinear models

This paper addresses the problem of choosing the multinomials that should compose a polynomial mathematical model starting from data. The mathematical representation used is a nonlinear differential equation of the polynomial type. Some approaches that have been used in the context of discrete-time models are adapted and applied to continuous-time models. Two examples are included to illustrate...

Synthesis Techniques for Polymers Applied to Enhanced Oil Recovery

The use of water soluble polymers for enhanced oil recovery (EOR) provides an additional chance to extract between 5 to 30% of total oil in place from drilled and mature reservoirs [1]. A big number of patents, mainly from multinational companies, remark the importance of polymers for EOR [2]. The role of the polymer in the aqueous solution is to increase the viscosity of the displacement solut...