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DIALNET OAI Articles (561,989 recursos)
Dialnet (Difusión de Alertas en la Red) es una plataforma de recursos y servicios documentales, cuyo objetivo fundamental se centra en mejorar la visibilidad y el acceso a la literatura científica hispana a través de Internet.

Tecnologías

Mostrando recursos 1 - 20 de 27,630

1. STATISTICAL ANALYSIS AND A CONCEPTUAL CLUSTERING METHOD TO RANK CLIENTS OF A FINANCIAL BANK. - Mora Flórez, Juan José; Colomer Llinás, Joan
In this paper, a classification approach to establish a ranking of the clients of the Tatra Bank (Slovakia), is given. The paper presents the statistical analysis of data in order to select useful information about the clients, followed by a classification strategy based on LAMDA (Learning Algorithm for Multivariable Data Analysis). Because of this approach, the client data provided by Tatra Bank is analyzed to obtain a training file. It is used as input file in learning process. The client classification is performed by the recognition process. This approach has two possibilities: self and supervised learning.

2. SISTEMA AUTOMÁTICO DE CONMUTACIÓN DE CARGAS PARA EL ESTUDIO DE ALGORITMOS DE CÁLCULO DE LAS PROPIEDADES DE LA POTENCIA. - Restrepo, Bonie Johana; Holguín Londoño, Germán Andrés; Morales, Angela Cristina
In the study of the power electric systems under nonideal condition, there isn�t agreements of theoretical level for determinations of some power�s properties. This work allows obtaining experimental results in electric circuits under several conditions of sources and load in which it can compare some power methods founds in IEEE series.

3. ALGORITMO GENÉTICO ESPECIALIZADO PARA LA LOCALIZACIÓN OPTIMA DE CAPACITORES EN SISTEMAS DE DISTRIBUCIÓN DE ENERGÍA ELÉCTRICA. - Gallego Rendón, Ramón Alfonso; Escobar Zuluaga, Antonio Hernando; Rodas Rendón, Dario E.
A Genetic Algorithm for solving the optimal capacitor placement problem in radial distribution is presented. Is a non linear integer mixed problem (NLIMP). The algorithm obtains the placement points, types and sizes of the capacitor banks and the control scheme.

4. SENSOR ULTRASÓNICO ROTATIVO PARA EL LEVANTAMIENTO DE ENTORNOS UTILIZANDO LA TÉCNICA DE TIEMPO DE VUELO (T of F). - Ríos González, Luis Hernando; Holguín Londoño, Germán Andrés; Mejía, Rodrigo
The present work describes different methods of map building of environments for mobile robot navigation; show maps of tipical environments obtained for the rotating sonar module designed, which, to be used in a mobile platform.

5. MODELAMIENTO DE COMPONENTES DE SISTEMAS COMPUESTOS GENERACIÓN � TRANSMISIÓN PARA ESTUDIOS DE CONFIABILIDAD. - Garces N., Lina Paola; Gómez Carmona, Oscar; Zapata, Carlos J.
This paper presents a methodology for modeling of composite power systems components for reliability studies.

6. FILTRO ACTIVO SHUNT Y LA ESTRATEGIA DE CONTROL DE LA FUENTE CONSTANTE DE POTENCIA INSTANTÁNEA PARA COMPENSACIÓN DE ARMÓNICOS.. - Alzate Gómez, Alfonso; Orozco-Gutierrez, Álvaro A.; Galván, Carlos
This paper describes a three-phase tour- wire shunt active filter using constant source instantaneous power control strategies. This strategy considers harmonics and zero sequence components in the voltage and current simultaneously. This description is using PSCAD Software.

7. GENERACIÓN DE FUNCIONES NO LINEALES UTILIZANDO REDES CON AOs. - Avendaño González, Luis Enrique; Rivera Piedrahita, Jorge Hernando
This document presents a procedure for design nonlinear functions using Op- Amps networks. A systemic approach for the calculation of components is given, and the necessity for multiple voltage references is eliminated. This development is based on the voltage sources transformation theory known as E-shift transformation.

8. ALTERNATIVAS DE ANÁLISIS DEL IMÁN ESFÉRICO. - Restrepo, Carlos Alberto
In this article is presented two, differents alternative to Laplace Equation solution and the charge magnetic method, for the magnetic field evaluation of the spherics iman with an uniform magnetization.

9. CARACTERIZACIÓN DE HUECOS DE TENSIÓN PARA LOCALIZACIÓN DE FALLAS EN SISTEMAS DE DISTRIBUCIÓN - UN PRIMER PASO HACIA UN MÉTODO HÍBRIDO. - Mora Flórez, Juan José; Meléndez, Joaquím
This paper is in the field of power quality and deals with the voltage sags or dips characterization based on qualitative and quantitative descriptors The characterization here presented is used to classify sags and relate these with the possible location of the fault. The results help to develop strategies to maintain the energy unavailability indexes beneath regulatory requirements. This approach helps both, to speed up the fault location, and identify the weak sections of the power network

10. FLUJO DE CARGA ARMÓNICO PARA SISTEMAS RADIALES. - Garcés Ruiz, Alejandro; Galvis, Juan Carlos; Gallego Rendón, Ramón Alfonso
The conventional power flow has been reformulated to permit the inclusion of non-linear loads. This paper presents a review of the different single phase harmonic load flow formulations and shows a methodology for radial distribution systems. The proposed methodology uses a back / forward sweep method applied to harmonic load flow.

11. DISEÑO Y DESARROLLO DE UN SISTEMA PARA LA REALIZACIÓN DE ENSAYOS DE TRANSFORMADORES DE DISTRIBUCIÓN PARA LA EMPRESA MAGNETRÓN S.A. - Orozco-Gutierrez, Álvaro A.; Giraldo Suárez, Eduardo; Calzada, Mauricio
Company Magnetrón needed test and a research laboratory for distribution tranformer; the idea was to improve its performance. The Faculty of Electrical Engineering designed and developed an automatization system from you complete investigations in the field of instrumentation.

12. SENSORES DE ULTRASONIDO USADOS EN ROBÓTICA MÓVIL PARA LA MEDICIÓN DE DISTANCIAS. - Navarro García, Danilo; Ríos González, Luis Hernando; Parra Lara, Hernando
El presente trabajo describe la técnica de medición de distancias con sensores de ultrasonido utilizando la técnica de Tiempo de Vuelo ( T of F); Presenta los resultados obtenidos por el módulo sensor de ultrasonido construido.

13. LA MURPHYOLOGIA DE LA SEGURIDAD EN REDES MÓVILES. - García Torres, Carlos
In the last decades the mobile communications have surprised to the humanity with their evolution; the advantages, privileges and comfortablenesses of can communicate to him from any place of the world without depending of external cables or telephone box is surprising. But the most important about with this document is the aspects that frame the step of security in this type of mobile nets, because the current generation (3G) offers services of banking and e-commerce in which it can be sell out consultations, important transactions, movements, payments and other utilities that offers a bank entity from their mobile telephone with a model of security not wholly reliable. In this...

14. MODELAMIENTO DE TRANSFORMADORES TRIFÁSICOS ABIERTOS. - Rodas Rendón, Dario E.
En el presente artículo se desarrollan los modelos para los transformadores trifásicos abiertos, vale decir para las conexiones Y abierta � Delta abierta y para la conexión Delta abierta � Delta abierta. Incluyendo variaciones de taps independientes en cada lado y en cada unidad.

15. ANÁLISIS ESTÁTICO DE CONTINGENCIAS DE POTENCIA ACTIVA EN SISTEMAS ELÉCTRICOS DE POTENCIA. - Gallego Pareja, Luis Alfonso; Escobar Zuluaga, Antonio Hernando
This paper shows a methodology for contingency analysis in stationary state for active power in electrical power systems. This application is used in planning and operation of electrical systems and is part of the security studies. A comparative analysis is shown for the calculation of the evaluating indexes for simple contingencies and in stationary state in which the performance index is calculated using load flow in A.C and D.C. The methology is tested in a real system of 17 buses, 23 lines and a total demand of 81 MW.

16. IMPORTANCIA DEL pH Y LA ALCALINIDAD EN EL TRATAMIENTO ANAEROBIO DE LAS AGUAS RESIDUALES DEL PROCESO DE EXTRACCIÓN DE ALMIDÓN DE YUCA. - Cajigas Cerón, Álvaro Andrés; Pérez Vidal, Andrea; Torres Lozada, Patricia
The characteristic of wastewaters from cassava starch extraction process are acid waste with a high contamination load. This article shows the results obtained in the operation of bench scale anaerobic filter using two products: Lime and Sodium Bicarbonate. The maximum COD removal efficiencies were achieved when Sodium Bicarbonate was used, since buffer capacity in the reactor was enough to neutralize the VOC. The IA/PA index was very sensible, for that, this will recommended as excellent indicator for anaerobic process control.

17. PROCESO DE INFORMACIÓN EN EL FORTALECIMIENTO DE LA GESTIÓN COMUNITARIA PARA EL SANEAMIENTO BÁSICO. CENTRO POBLADO LA FLORIDA, MUNICIPIO DE PEREIRA. - Castaño, Juan Mauricio; Paredes Cuervo, Diego; Trejos G., Claudia Lorena
In the Otún mid-river basin, of the municipality of Pereira (Colombia), the strengthen of community management has been initiated so that they can take into their own hands the managing of the sewer system service, as a key aspect of sustainable solutions implemented in the settlement of La Florida. In order to have participation from the community and for them to assume the administration, operation and maintenance of this service, it is recognized that an information process should be developed.

18. OPTIMIZACION DE UN RECONOCEDOR DE TEXTO MANUSCRITO POR MEDIO DE MAPAS AUTOORGANIZADOS DE KOHONEN (RNA�s). - Gómez Valencia, Juan Diego
This text describes an application more than the nets artificial neuronals and its great capacity for the memorization of patterns. In this occasion a structure neuronal of Kohonen is implemented that it is trained so that each one of the letters of the alphabet can identify (uppercase), which are given of pulse and the own user's letter by means of an entrance peripheral as optic pencil or mouse. The applications were programmed in C++ using the bookstore Allegro.

19. UNA DEMOSTRACIÓN ALTERNATIVA PARA EL TEOREMA FUNDAMENTAL DEL ÁLGEBRA POR MEDIO DEL GRADO TOPOLÓGICO. - Osorio M., Maria Juliana; Osorio A., Luis Eduardo
In this paper we present a simple proof of algebra fundamental theorem, using a tool known as topological degree and its strong properties which make easy the proof of this theorem.

20. LA NOCIÓN DE C-DENSIDAD Y LOS AXIOMAS BAJOS DE SEPARACIÓN. - Avila G., Jesús Antonio; Lozano, Claudia Lorena
En este artículo se definen los espacios c T como aquellos que son 0 T y todos sus puntos son c-densos. Además se muestra la relación existente entre estos espacios y los D T . Finalmente se estudia su preservación por homeomorfismos, por extensión de la topología, por subespacios y se presentan algunas propiedades derivadas de su orden de especialización.

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