Technical systems can be characterized very often as complex heterogeneous. Many simulation algorithms exist for the analysis of continuous and discrete systems. However, the first modeling steps in the physical domains have not been sufficiently assisted by CAD tools. Multiports and generalized...

This paper presents the development of a hybrid fuzzy modeling method for short-term load forecasting. The new approach employs the orthogonal least squares method to create the fuzzy model and a constrained optimization algorithm to perform the parameter learning. The proposed model is tested...

We propose a neural network method for the generation of symbolic expressions using reinforcement learning. Usually, the symbolic form expressed in terms of a calculus (propositional, first-order, lambda, etc.) is deemed comprehensible by humans and it is necessary as far as the acceptance of...

A direct method for solving variational problems using Legendre wavelets is presented. An operational matrix of integration is first introduced and is utilized to reduce a variational problem to the solution of algebraic equations. Illustrative examples are included to demonstrate the validity...

Intelligent control techniques for robotic systems have been used with some success in a wide variety of applications. In this paper, we construct a method for the intelligent control system of a robot using the fuzzy behavior-based control, which decomposes the control system into several...

The problem of smoothing data trough a transform in the Fourier domain is analyzed in the case of correlated noise affecting data. A regularization method and two GCV-type criteria are resorted in order to solve the problem, in analogy with the case of uncorrelated noise. All convergence...

Wavelets are a basis for L2(R) and the structure of the subspaces involved in a wavelet decomposition of L2(R) are well understood and elegantly described by the notion of multiresolution analysis. In practice, however, one is usually more interested in a decomposition of functions in l2(Z). The...

In this paper we review the current state of the problem solving environment (PSE) field and make projections for the future. First we describe the computing context, the definition of a PSE and the goals of a PSE. The state-of-the-art is summarized along with the principal components and...

The roundoff errors in computer simulations of continuous dynamical systems caused by finiteness of machine arithmetic lead to spatially discrete systems with distinct functional properties. As models for the discretized systems in fixed-point arithmetic, autonomous dynamical systems on...

In this paper we discuss an object oriented description of bond graph models of hydraulic components by means of the unified modeling language Modelica. A library which is still under development is briefly described and models of some standard hydraulic components are given for illustration. In...