Search Results - "Perez Ortega, Joaquin"

Narrow transmittance peaks in a multilayered microsphere with a quasiperiodic left-handed stack by Burlak, Gennadiy, Díaz-de-Anda, A., Salgado, René Santaolaya, Ortega, Joaquín Pérez

“…We studied the photon spectrum in coated microspheres with alternating quasiperiodic layers having left-handed (LH) materials included. It is found that the…”
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Hurst Exponent with ARIMA and Simple Exponential Smoothing for Measuring Persistency of M3- Competition Series by Ponce Flores, Mirna Patricia, Frausto Solis, Juan, Castilla Valdez, Guadalupe, Gonzalez Barbosa, Juan Javier, Perez Ortega, Joaquin, Teran Villanueva, Jesus David

“…The Hurst exponent is a metric used to evaluate whether a time series exhibits long-term memory, and it is used to identify its complexity. Besides,…”
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Towards a Characterization of Difficult Instances of the Bin Packing Problem by Mexicano Santoyo, Adriana, Perez Ortega, Joaquin, Romero, David, Cruz Reyes, Laura

“…We address the multidimensional characterization of difficult instances of the Bin Packing Problem, well known in the combinatorial optimization realm. In…”
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Survey of polynomial transformations between NP-complete problems by Ruiz-Vanoye, Jorge A., Pérez-Ortega, Joaquín, Pazos R., Rodolfo A., Díaz-Parra, Ocotlán, Frausto-Solís, Juan, Fraire Huacuja, Hector J., Cruz-Reyes, Laura, Martínez F., José A.

“…This paper aims at being a guide to understand polynomial transformations and polynomial reductions between NP-complete problems by presenting the…”
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Balancing effort and benefit of K-means clustering algorithms in Big Data realms by Pérez-Ortega, Joaquín, Almanza-Ortega, Nelva Nely, Romero, David

“…In this paper we propose a criterion to balance the processing time and the solution quality of k-means cluster algorithms when applied to instances where the…”
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Correlation between mobility in mass transport and mortality due to COVID-19: A comparison of Mexico City, New York, and Madrid from a data science perspective by Vega-Villalobos, Andrea, Almanza-Ortega, Nelva Nely, Torres-Poveda, Kirvis, Pérez-Ortega, Joaquín, Barahona, Igor

“…In most big cities, public transports are enclosed and crowded spaces. Therefore, they are considered as one of the most important triggers of COVID-19 spread…”
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Time Series Complexities and Their Relationship to Forecasting Performance by Ponce-Flores, Mirna, Frausto-Solís, Juan, Santamaría-Bonfil, Guillermo, Pérez-Ortega, Joaquín, González-Barbosa, Juan J

“…Entropy is a key concept in the characterization of uncertainty for any given signal, and its extensions such as Spectral Entropy and Permutation Entropy. They…”
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Hybrid Fuzzy C-Means Clustering Algorithm Oriented to Big Data Realms by Pérez-Ortega, Joaquín, Roblero-Aguilar, Sandra Silvia, Almanza-Ortega, Nelva Nely, Frausto Solís, Juan, Zavala-Díaz, Crispín, Hernández, Yasmín, Landero-Nájera, Vanesa

“…A hybrid variant of the Fuzzy C-Means and K-Means algorithms is proposed to solve large datasets such as those presented in Big Data. The Fuzzy C-Means…”
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Influence of Transfer Entropy in the Short-Term Prediction of Financial Time Series Using an ∊-Machine by Zavala-Díaz, José Crispín, Pérez-Ortega, Joaquín, Almanza-Ortega, Nelva Nely, Pazos-Rangel, Rodolfo, Rodríguez-Lelís, José María

“…Predicting the values of a financial time series is mainly a function of its price history, which depends on several factors, internal and external. With this…”
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Hybrid Fuzzy C-Means Clustering Algorithm, Improving Solution Quality and Reducing Computational Complexity by Pérez-Ortega, Joaquín, Moreno-Calderón, Carlos Fernando, Roblero-Aguilar, Sandra Silvia, Almanza-Ortega, Nelva Nely, Frausto-Solís, Juan, Pazos-Rangel, Rodolfo, Martínez-Rebollar, Alicia

“…Fuzzy C-Means is a clustering algorithm widely used in many applications. However, its computational complexity is very large, which prevents its use for large…”
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A New Criterion for Improving Convergence of Fuzzy C-Means Clustering by Pérez-Ortega, Joaquín, Moreno-Calderón, Carlos Fernando, Roblero-Aguilar, Sandra Silvia, Almanza-Ortega, Nelva Nely, Frausto-Solís, Juan, Pazos-Rangel, Rodolfo, Rodríguez-Lelis, José María

“…One of the most used algorithms to solve the fuzzy clustering problem is Fuzzy C-Means; however, one of its main limitations is its high computational…”
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Application of Data Science for Cluster Analysis of COVID-19 Mortality According to Sociodemographic Factors at Municipal Level in Mexico by Pérez-Ortega, Joaquín, Almanza-Ortega, Nelva Nely, Torres-Poveda, Kirvis, Martínez-González, Gerardo, Zavala-Díaz, José Crispín, Pazos-Rangel, Rodolfo

“…Mexico is among the five countries with the largest number of reported deaths from COVID-19 disease, and the mortality rates associated to infections are…”
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POFCM: A Parallel Fuzzy Clustering Algorithm for Large Datasets by Pérez-Ortega, Joaquín, Rey-Figueroa, César David, Roblero-Aguilar, Sandra Silvia, Almanza-Ortega, Nelva Nely, Zavala-Díaz, Crispín, García-Paredes, Salomón, Landero-Nájera, Vanesa

“…Clustering algorithms have proven to be a useful tool to extract knowledge and support decision making by processing large volumes of data. Hard and fuzzy…”
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Searching for Cerebrovascular Disease Optimal Treatment Recommendations Applying Markovian Processes by Victorio-Meza, Hermilo, Mejia-Lavalle, Manuel, Martinez Rebollar, Alicia, Perez Ortega, Joaquin, Pichardo Lagunas, Obdulia, Sidorov, Grigori

“…It is modeled diagnosis and treatment for cerebrovascular diseases by partially observable Markov decision processes. It is desired that this model will be…”
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Application of formal languages in polynomial transformations of instances between NP-complete problems by Ruiz-Vanoye, Jorge A, Pérez-Ortega, Joaquín, Pazos Rangel, Rodolfo A, Díaz-Parra, Ocotlán, Fraire-Huacuja, Héctor J, Frausto-Solís, Juan, Reyes-Salgado, Gerardo, Cruz-Reyes, Laura

“…We propose the usage of formal languages for expressing instances of NP-complete problems for their application in polynomial transformations. The proposed…”
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Mathematical Model for Optimizing the Composition of an Investment Portfolio for the Mexican Stock Market by Zavala-Diaz, J.C., Perez-Ortega, J., Rodolfo, P.R., Dalia, V.G.V., Cruz-Reyes, L.

“…A linear programming mathematical model is presented, which permits to compose an investment portfolio that achieves the maximal return at minimal risk from…”
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Minimizing roundtrip response time in distributed databases with vertical fragmentation by Pazos, Rodolfo A., Vázquez, Graciela, Martínez, José A., Pérez-Ortega, Joaquín, Martínez-Luna, Gilberto

“…The main purpose of this paper is to show the advantage of using a model proposed by us, which minimizes roundtrip response time versus traditional models that…”
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Systematic Review of Methodologies in Data Science by Ruiz-Lopez, Francisco, Perez-Ortega, Joaquin, Ortiz-Hernandez, Javier, Hernandez-Perez, Yasmin, Saenz-Sanchez, Socorro

“…In this paper, the problem of finding outstanding research works in the topic of methodologies of Data Science was addressed. Although there are survey-type…”
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“Cooperation Greedy Monkey Algorithm”: Algoritmo paralelo para resolver la clase fuertemente correlacionada del problema de la mochila 0-1 by Zavala-Díaz, José Crispín, Pérez-Ortega, Joaquín, Almanza-Ortega, Nely Nelva, López-Calderón, Jaqueline

“…Se presenta la paralelización del Cooperation Greedy Monkey Algorithm y el ajuste de parámetros para resolver el problema KP 0-1 (0-1 Knapsack Problem). Los…”
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Matrix multiplication with a hypercube algorithm on multi-core processor cluster by Zavala-Diaz, José Crispín, Pérez-Ortega, Joaquín, Salazar-Reséndiz, Efraín, Guadarrama-Rogel, Luis César

“…The algorithm of multiplication of matrices of Dekel, Nassimi and Sahani or Hypercube is analysed, modified and implemented on multicore processor cluster,…”
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