DSpace Community: En esta colección podrás consultar todo lo relacionado al Desarrollo Científico y Tecnológico del Instituto.
http://repositoriodigital.ipn.mx/handle/123456789/2584
En esta colección podrás consultar todo lo relacionado al Desarrollo Científico y Tecnológico del Instituto.2024-03-29T02:15:04ZDiagnóstico y predicción del hábitat en la camaronicultura
http://repositoriodigital.ipn.mx/handle/123456789/17241
Title: Diagnóstico y predicción del hábitat en la camaronicultura
Authors: Carbajal Hernández, José Juan
Abstract: Resumen. La calidad del agua puede ser evaluada directamente mediante pruebas de toxicidad y efectos negativos generados por los parámetros del agua, proporcionando un indicador de calidad del agua en estanques de cultivo de camarón. En este trabajo de tesis, se proponen tres modelos para el diagnóstico de la calidad del agua: Un modelo para el análisis instantáneo, un segundo para el análisis histórico y finalmente, un tercero para predecir la calidad del agua. Los parámetros de la calidad del agua son evaluados individualmente mediante un índice (gamma), determinando su impacto negativo y sus posibles consecuencias en el organismo. Mediante un sistema de inferencia difusa se evalúan aquellas situaciones negativas en el ecosistema, proporcionando dos índices de la calidad del agua: IWQI para diagnóstico instantáneo y HWQI para diagnóstico de un conjunto de mediciones. Asimismo, un modelo autorregresivo (AR) es empleado para predecir valores de los parámetros de calidad del agua, que a su vez, son evaluados por el sistema de inferencia difusa proporcionando un índice predictivo de calidad del agua (PWQI). Comparaciones de los modelos propuestos contra índices de la calidad del agua publicados en recientes investigaciones y por organismos internacionales, permiten resaltar la eficiencia y buen funcionamiento de nuestro modelo.2013-09-11T00:00:00ZTridimensional-Temporal-Thematic Hydroclimate Modeling of Distributed Parameters for the San Miguel River Basin
http://repositoriodigital.ipn.mx/handle/123456789/17240
Title: Tridimensional-Temporal-Thematic Hydroclimate Modeling of Distributed Parameters for the San Miguel River Basin
Authors: Heras Sánchez, María del Carmen; Ochoa Granillo, José Alfredo; Watts Thorp, Christopher; Saiz Hernández, Juan Arcadio; Hazas Izquierdo, Raúl Gilberto; Gómez Albores, Miguel Ángel
Abstract: Abstract. A geographic database (GDB) for the San Miguel river basin has been built by integrating data from multiple sources for analysis and graphical representation of diverse physiographic features and hydroclimate phenomena such as rainfall, temperature, soil-evaporation and topography, among others. This database allowed us to combine digital maps and images along with thematic information and spatially-referenced vector data. Moreover, further geographical referencing and validating processes enabled us to accurately represent continuous data through discrete data structures which fit the mathematical models used in representing the physical phenomena at the study site. In this paper we discuss some significant progress on models generated for the analysis of existing records for a season with measurable rainfall at the San Miguel river basin during the period from June 1st to September 30th of 2005.2013-09-11T00:00:00ZA New LU Decomposition on Hybrid GPU-Accelerated Multicore Systems
http://repositoriodigital.ipn.mx/handle/123456789/17239
Title: A New LU Decomposition on Hybrid GPU-Accelerated Multicore Systems
Authors: González, Héctor Eduardo; Carmona, Juan
Abstract: Abstract. In this paper, we postulate a new decomposition theorem of a matrix A into two matrices, namely, a lower triangular matrix M, in which all entries are determinants, and an upper triangular matrix U whose entries are also in determinant form. From a well-known theorem on the pivot elements of the Doolittle-Gauss elimination process, we deduce a corollary to obtain a diagonal matrix D. With it, we scale the elementary lower triangular matrix of the Doolittle-Gauss elimination process and deduce a new elementary lower triangular matrix. Applying this linear transformation to A by means of both minimum and complete pivoting strategies, we obtain the determinant of A as if it had been calculated by means of a Laplace expansion. If we apply this new linear transformation and the above pivot strategy to an augmented matrix (A|b), we obtain a Cramer’s solution of the linear system of equations.2013-09-11T00:00:00ZPerformance Evaluation of Infrastructure as Service Clouds with SLA Constraints
http://repositoriodigital.ipn.mx/handle/123456789/17238
Title: Performance Evaluation of Infrastructure as Service Clouds with SLA Constraints
Authors: Lezama Barquet, Anuar; Tchernykh, Andrei; Yahyapour, Ramin
Abstract: Abstract. In this paper, we present an experimental study of job scheduling algorithms in infrastructure as a service type in clouds. We analyze different system service levels which are distinguished by the amount of computing power a customer is guaranteed to receive within a time frame and a price for a processing time unit. We analyze different scenarios for this model. These scenarios combine a single service level with single and parallel machines. We apply our algorithms in the context of executing real workload traces available to HPC community. In order to provide performance comparison, we make a joint analysis of several metrics. A case study is given.2013-09-11T00:00:00Z