Unbalanced Three-Phase Induction Motors Starting and Arc Welding Machines Short-Circuit Modeling

Three-Phase Induction Motors (TIM) and Arc Welding Machines (AWM) are loads of special behavior widely used in industrial and commercial installations, and therefore may contribute significantly to the deterioration of the quality of energy supplied by utilities. This paper proposes a modeling in constant power of the unbalanced TIM starting using Genetic Algorithm (GA) and AWM short-circuit based on their statics characteristics curves. The proposed models are compared with the conventional models in the literature. The results showed the good performance of the proposed models, allowing a more precise analysis of the real requests of these loads.

Surface reconstruction using multiple light sources and perspective projection

This paper presents a method to recover 3D geometry of Lambertian surfaces by using multiple images taken from the same view point and with the scene illuminated from different positions. This approach differs from Stereo Photometry in that it considers the light source at a finite distance from the object and the perspective projection in image formation. The proposed model allows local solution and recovery of 3D coordinates, in addition to surface orientation. A procedure to calibrate the light sources is also presented. Results of the application of the algorithm to synthetic images are shown.

Dental arches multi-projection system with semantic descriptions

This paper presents the development of an multi-projection stereoscopic dental arches application with semantic descriptions. The first section presents the concepts of the used technologies. Applications and examples are demonstrated. Finally, is presented the physical structure and the developed system, where a 3D dental arch is used as a model and can be viewed in multi-projection, thereby, providing greater user's immersion. ©2010 IEEE.

Proyección de población = Population projection

Incluye CD-ROM

Proyección de población = Population projection

Incluye CD-ROM

Population projection model for small island countries, an illustration for Aruba 2003-2023

Includes bibliography

América Latina: proyecciones de población, 1950-2025 = Latin America: population projection, 1950-2025

Publicación bilingüe (Español e inglés)

América Latina: proyecciones de población, 1950-2025 = Latin America: population projection, 1950-2025

Publicación bilingüe (Español e inglés)

América Latina: proyecciones de población, 1950-2025 = Latin America: population projection, 1950-2025

Publicación bilingüe (Español e inglés)

América Latina: proyecciones de población urbana-rural, 1970-2025 = Latin America: projection of the urban-rural population, 1970-2025

Publicación bilingüe (Español e inglés)

América Latina: proyecciones de población, 1950-2025 = Latin America: population projection, 1950-2025

Publicación bilingüe (Español e inglés)

América Latina: proyecciones de población, 1970-2050 = Latin America: population projection, 1970-2050

Publicación bilingüe (Español e inglés)

América Latina: proyecciones de población urbana y rural, 1970-2025 = Latin America: projection of the urban and rural population, 1970-2025

Publicación bilingüe (Español e inglés)