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Synthesis of platinum nanostructures using zeolites
(2011)
Due to their outstanding and tunable electronic properties, platinum nanowires have the potential to be used in the development of advanced devices. The quantum confinement effect of the electrons and the increased surface ...
Estimación de densidades multivariadas en flujo de datos usando mezclas adaptativas de componentes gaussianas
(2012-06)
In the current world of science and technology the data arrive continuously over time, this type of data is called data stream and is impractical to store all of the data. The data mining and traditional techniques of ...
Aplicación de componentes principales en el desarrollo de indices: social, educativo y económico para la clasificación de los municipios de Puerto Rico
(2013-05)
Several findings in this research could be relevant to decision making by government agencies of Puerto Rico. This decision making depends on knowledge of the social, educational and economic aspects of the municipalities. ...
Comparación de técnicas basadas en muestreo para solucionar el problema de dos clases desbalanceadas
(2011-05)
Nowadays, estimation and evaluation of classification models has increased as an area of research in pattern recognition in data bases. One of the main problems that contribute to performance deterioration of classification ...
High explosives detection in international mail using See-Through Raman Spectroscopy assisted by multivariate analysis
(2020-12-09)
See-Through Raman Spectroscopy (STRS) was used for the non-invasive, non-destructive sample analysis of high explosives (HEs) in mail envelopes or flats. The method resulted in a safe and rapid analysis of HEs: ammonium ...
Técnica de componentes indepedientes: aplicación y análisis de datos de series temporales sobre Puerto Rico
(2014-06)
The time series analysis is oriented to the problem of prediction. Perform a univariate analysis is simpler than a multivariate analysis because the univariate analysis is concerned only with the structure of internal ...
Rendimiento de los estudiantes del Recinto Universitario de Mayagüez en su primer curso de matemáticas : una aplicación de análisis multivariado
(2010-12)
We obtained data from 6,924 freshmen admitted to the University of Puerto Rico at Mayagüez since 2005 to 2007. For each one of these students we registered information about the following variables: Type of high school ...
Efecto de casos anómalos en máquinas de vectores de soporte
(2009-03)
Support Vector Machines (SVM) is a new technique of classification that has received much attention in recent years. In many applications, the SVM has shown better performance than machine learning methods, and it has been ...
The effect of the ARRA infrastructure funds to the economic cycles of the 50 U.S. states and Puerto Rico
(2011-05)
This study is dedicated to examine how the distribution and expenditure of the funds of the American Recovery and Reinvestment Act (ARRA) of 2009 destined to infrastructure projects impacted the economic cycles of the 50 ...
Modelo de clasificación y predicción en dos etapas: utilizando árboles de clasificación y el análisis de regresión multivariada
(2015-06)
Currently there exists a great variety of methods and algorithms attempting to optimize the process of classification. However, these methods do not take into account the internal structure of the classification datasets. ...