We consider some examples of the use of computer algebra packages, specifically Maple and Mathematica, applied to some problems in integrable and nonintegrable systems in nonlinear continuous and lattice wave models.

This paper presents an automatic control system for welding the root-pass in a seam joining a nozzle perpendicular onto a large diameter pipe. The system is based on the use of a geometry model of the welding seam and on inverse welding process models (i.e. models that map desired weld quality,...

A major determinant of plant disease occurrence is the temperature and relative humidity experienced during the growing season. Historical temperature and relative humidity data may be used to determine the probable risk of specific crop diseases occurring in a particular region or country....

Simulating a dynamic complex system consists in splitting the system into a number of elementary pieces and describing the behavior of each element and the interactions between these elements during a finite interval of time. Simulation is useful when the real system is not always available or...

This article presents a trajectory planning strategy with a time law which, using a generalized potential, makes it possible to take into account the risk presented by each obstacle. Section 2 defines the generalized potential at a given point created by an obstacle, the risk coefficient of...

Since the last few decades the application of system theory concepts and modern model based control techniques to the optimization of biotechnological processes has received a lot of attention. This represents a challenging field of research for the following reasons. First, the dynamics of...

This paper describes the application of a neural network based classifier system to the control of a simulated autonomous guided vehicle (AGV) in a simple obstacle avoidance task. A mechanism for concurrent exploration and exploitation of a maze environment based on Kohonen feature maps is...

In this paper we present an approach to the solution of parameter estimation problems in systems described mathematically by differential algebraic equations. The numerical solution of these equations is compared with measurements from experiments. By adaptation of the parameters in the...

Control theory provides methods to calculate optimal control of agricultural ecosystems based on dynamic models. Optimization problems formulated with these models can focus either on small time scales (one vegetation period) or significant larger scales (crop rotations). Performance criteria...