CONACyT Consejo Nacional de Ciencia y Tecnologia

Ejido Benito Juárez, Mexico

CONACyT Consejo Nacional de Ciencia y Tecnologia

Ejido Benito Juárez, Mexico
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Tellez E.S.,CONACyT Consejo Nacional de Ciencia y Tecnologia | Tellez E.S.,Infotec Research Center novacion En Tecnologias Of La Informacion municacion | Miranda-Jimenez S.,CONACyT Consejo Nacional de Ciencia y Tecnologia | Miranda-Jimenez S.,Infotec Research Center novacion En Tecnologias Of La Informacion municacion | And 6 more authors.
Pattern Recognition Letters | Year: 2017

Recently, sentiment analysis has received a lot of attention due to the interest in mining opinions of social media users. Sentiment analysis consists in determining the polarity of a given text, i.e., its degree of positiveness or negativeness. Traditionally, Sentiment Analysis algorithms have been tailored to a specific language given the complexity of having a number of lexical variations and errors introduced by the people generating content. In this contribution, our aim is to provide a simple to implement and easy to use multilingual framework, that can serve as a baseline for sentiment analysis contests, and as a starting point to build new sentiment analysis systems. We compare our approach in eight different languages, three of them correspond to important international contests, namely, SemEval (English), TASS (Spanish), and SENTIPOLC (Italian). Within the competitions, our approach reaches from medium to high positions in the rankings; whereas in the remaining languages our approach outperforms the reported results. © 2017 Elsevier B.V.


Patino F.,Universidad Politécnica de Ingeniería | Flores M.U.,Technological University of Tulancingo | Reyes I.A.,CONACyT Consejo Nacional de Ciencia y Tecnologia | Reyes I.A.,Autonomous University of San Luis Potosi | And 5 more authors.
Reaction Kinetics, Mechanisms and Catalysis | Year: 2016

This piece of work presents a study on the reaction of beudantite in NaOH medium under a wide range of experimental conditions. The partial decomposition of solids indicates the presence of an unreacted beudantite core, a reaction front and a halo of amorphous decomposition gel made of iron hydroxides and lead, through which sulfate and arsenate ions diffuse from the beudantite into the medium, while hydroxide ions from the medium diffuse through the gel onto the core of spherical particles of beudantite. We studied the dependence of the reaction rate on (OH−1) concentration, temperature and particle size in order to determine the reaction order and activation energy of the decomposition process of beudantite. A comparative study on the experimental rate constants of the alkaline decomposition of beudantite and other arsenic jarosites was conducted. © 2016 Akadémiai Kiadó, Budapest, Hungary

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