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This paper presents the computer simulation of a switched reluctance machine (SRM) operating as a generator proposing an alternative for the representation of the inductances of the machine coils and their respective rates of variation. The simulation results show the reliability of the proposed model, especially in comparison with other models of machine inductance representation. The validation...
The problem addressed in this paper consists in triangulating the van der Waals surface without computing the geometric intersections of its atoms. Recall that the van der Waals surface is useful in computational molecular biology and biochemistry to, for example, determine the volume occupied by a molecule, as well as other important geometric properties. Assuming that every atom is represented by...
This paper describes a hybrid approach in which generation cost and demand uncertainties are represented by fuzzy numbers and the life cycle of system components is modeled by probabilistic models. The Monte Carlo simulation model is used to sample system states according to the failure rates of the system components and a Fuzzy DC OPF model is used to analyse each sampled state. This Fuzzy DC OPF...
In the field of computer graphics, physically-based fluids simulations (i.e., simulations that solve the equations that govern fluids behaviour) are performed using, among others, Stam's stable fluids method. This method requires the solution of two sparse linear systems that can be solved using an iterative solver (e.g., Jacobi, Gauss-Seidel, conjugate gradient, etc.). Focusing on real-time 3D applications,...
Fluid simulation has been an active research field in computer graphics for the last 30 years. Stam's stable fluids method, among others, is used for solving the equations that govern fluids (i.e. Navier-Stokes equations). An implementation of stable fluids in 3D using NVIDIA Compute Unified Architecture, shortly CUDA, is provided in this paper. This CUDA-based implementation also features the accurate...
In this paper we propose a Web 3D graphics library, called Glypher3D, entirely written in Javascript that allows for the development of 3D contents, directly in the browser. We use HTML 5 canvas element together with 3D graphics algorithms (e.g. back-face culling) encoded in Javascript. Usually, the canvas element is used to draw graphics in a 2D context, so we take advantage of these 2D drawing capabilities...
A two-phase approach to provide decision support in the design and selection of load control actions in electricity networks is described. The first phase consists in the use of a multiple objective genetic algorithm, coupled with physically-based load models, for the design and selection of a set of potential non-dominated solutions (load control actions). The second phase performs the selection...
This paper describes the use of an interactive evolutionary algorithm for the identification and selection of direct load control actions in electrical distribution networks. The evolutionary algorithm accommodates a progressive articulation of the decision maker's preferences by changing aspiration or reservation levels used in the fitness assessment of the individuals in the population (load control...
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