Search Results - time frequency analysis

Frequency–Time Domain Analysis Based on Electrochemical Noise of Dual-Phase (DP) and Ferrite–Bainite (FB) Steels in Chloride Solutions for Automotive Applications by Almeraya Calderón, Facundo, Montoya Rangel, Marvin, Nieves Mendoza, Demetrio, Jáquez Muñoz, Jesús Manuel, Baltazar Zamora, Miguel Ángel, Landa Ruiz, Laura, Lara Banda, María del Refugio, Maldonado Bandala, Erick, Estupiñan López, Francisco Humberto, Gaona Tiburcio, Citlalli

“…At room temperature, the steels were immersed in NaCl, CaCl2, and MgCl2 solutions and were studied by frequency–time domain analysis using wavelet decomposition, Hilbert–Huang analysis, and recurrence plots (RPs) related to the corrosion process and noise impedance (Zn). …”
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¿Existe memoria larga en mercados bursátiles, o depende del modelo, periodo o frecuencia? (Is there Long Memory in Stock Markets, or Does it Depend on the Model, Period or Frequenc... by Salazar-Núñez, Héctor F., Venegas-Martínez, Francisco, Calderón-Villareal, Cuahutémoc

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Electrochemical Noise Analysis: An Approach to the Effectivity of Each Method in Different Materials by Jáquez Muñoz, Jesús Manuel, Gaona Tiburcio, Citlalli, Méndez Ramírez, Ce Tochtli, Martínez Ramos, Cynthia, Baltazar Zamora, Miguel Ángel, Santiago Hurtado, Griselda, Estupiñan López, Francisco Humberto, Landa Ruiz, Laura, Nieves Mendoza, Demetrio, Almeraya Calderón, Facundo

“…The objective of this research is to characterize by EN technique different aeronautical alloys (Al, Ti, steels, and superalloys) using different analysis methods such as time domain (visual analysis, statistical), frequency domain (power spectral density (PSD)), and frequency–time domain (wavelet decomposition, Hilbert Huang analysis, and recurrence plots (RP)) related to the corrosion process. …”
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Análisis de armónicas dinámicas con filtros de respuesta impulsional finita diseñados con O-splines by De la O Serna, José Antonio

Subjects: “…time-frequency analysis…”
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Replication of Integrative Data Analysis for Adipose Tissue Dysfunction, Low-Grade Inflammation, Postprandial Responses and OMICs Signatures in Symptom-Free Adults by Gallegos Cabriales, Esther Carlota, Rodríguez Ayala, Ernesto, Laviada Molina, Hugo A., Nava González, Edna Judith, Salinas Osornio, Rocío A., Orozco, Lorena, Leal Berumen, Irene, Castillo Pineda, Juan Carlos, González López, Laura, Escudero Lourdes, Claudia, Cornejo Barrera, Judith, Escalante Araiza, Fabiola, Huerta Ávila, Eira E., Buenfil Rello, Fatima A., Peschard, Vanessa Giselle, Silva, Eliud, Veloz Garza, Rosa A., Martínez Hernández, Angélica, Barajas Olmos, Francisco M., Molina Segui, Fernanda, Gonzalez Ramirez, Lucia, Arjona Villicaña, Ruy D., Hernandez Escalante, Victor M., Gaytan Saucedo, Janeth F., Vaquera, Zoila, Acebo Martinez, Mónica Lucía, Murillo Ramirez, Areli, Diaz Tena, Sara P., Figueroa Nuñez, Benigno, Valencia Rendón, Melesio E., Garzon Zamora, Rafael, Viveros Paredes, Juan Manuel, Valdovinos Chávez, Salvador B., Comuzzie, Anthony G., Haack, Karin, Thorsell, Ashley A., Han, Xianlin, Cole, Shelley A., Bastarrachea, Raúl A.

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Electrochemical Noise Analysis Using Experimental Chaos Theory, Power Spectral Density and Hilbert–Huang Transform in Anodized Aluminum Alloys in Tartaric–Phosphoric–Sulfuric Acid... by Martínez Ramos, Cynthia, Olguín Coca, Javier, López León, Luis Daimir, Gaona Tiburcio, Citlalli, Lara Banda, María del Refugio, Maldonado Bandala, Erick, Castañeda Robles, Ivan, Jáquez Muñoz, Jesús Manuel, Cabral Miramontes, José Ángel, Nieves Mendoza, Demetrio, Almeraya Calderón, Facundo

“…In the EN, three methods of data analysis were used: the time domain analysis (chaos analysis: application of Lyapunov exponent and dimension correlation), the frequency domain analysis (power spectral density, PSD), and the time–frequency domains analysis (Hilbert–Huang transform, HHT). …”
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Clustering of Rainfall Stations in RH-24 Mexico Region Using the Hurst Exponent in Semivariograms by Benavides Bravo, Francisco Gerardo, Almaguer Martínez, Francisco Javier, Soto Villalobos, Roberto, Tercero Gómez, Víctor, Morales Castillo, Javier

“…Using the semivariograms, the Hurst exponent was obtained and used as an input to perform a cluster analysis of rainfall stations. Groups of homogeneous samples that might be useful in a regional frequency analysis were obtained through the process.…”
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Use of Electrochemical Noise for the Study of Corrosion by Passivated CUSTOM 450 and AM 350 Stainless Steels by Almeraya Calderón, Facundo, Villegas Tovar, José Miguel, Lara Banda, María del Refugio, Jáquez Muñoz, Jesús Manuel, Estupiñan López, Francisco Humberto, Gaona Tiburcio, Citlalli

“…Two methods of data analysis were applied concerning EN: the domain of frequencies (power spectral density, PSD) and the time–frequency domain (Hilbert-Huang Transform). …”
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Electrochemical Corrosion of Titanium and Titanium Alloys Anodized in H2SO4 and H3PO4 Solutions by Jáquez Muñoz, Jesús Manuel, Gaona Tiburcio, Citlalli, Chacón Nava, José G., Cabral Miramontes, José Ángel, Nieves Mendoza, Demetrio, Maldonado Bandala, Erick, Delgado, Anabel D., Flores de los Ríos, Juan Pablo, Bocchetta, Patrizia, Almeraya Calderón, Facundo

“…Regarding EN, two methods of data analysis were used: the frequency domain (power spectral density, PSD) and time-frequency domain (discrete wavelet transform). …”
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Los precios del petróleo y la actividad económica en México: Oil Prices and Economic Activity in Mexico by Ruiz-Porras, Antonio, Anguiano-Pita, Javier Emmanuel

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Effect of heat treatment on the electrochemical behavior of AA2055 and AA2024 alloys for aeronautical applications by Rivera Cerezo, Heriberto, Gaona Tiburcio, Citlalli, Cabral Miramontes, José Ángel, Bautista Margulis, Raúl German, Nieves Mendoza, Demetrio, Maldonado Bandala, Erick, Estupiñan López, Francisco Humberto, Almeraya Calderón, Facundo

“…The aim of this work was to investigate the influence of different heat treatments on the electrochemical corrosion behavior of the alloys AA2055 and AA2024 in the presence of three different electrolytes at room temperature, using an electrochemical noise (EN) technique in accordance with the ASTM-G199 standard. In the time domain, the polynomial method was employed to obtain the noise resistance (Rn), the localization index (IL), skewness, and kurtosis, and in the frequency domain, employing power spectral density analysis (PSD). …”
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Mecanismos de resistencia y perfil de expresion de genes involucrados en la resistencia a la deltametrina en poblaciones de Aedes aegypti (L.) (Diptera: Culicidae) en México by Contreras Perera, Yamili Jazmin

“…The frequency of L410 increased from 1.18 to 2.63 for V1016 an increase was observed between 1.19 and 2.79 times, and C1534 was fixed in all strains after deltamethrin selection. …”
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Mecanismos de resistencia y perfil de expresion de genes involucrados en la resistencia a la deltametrina en poblaciones de Aedes aegypti (L.) (Diptera: Culicidae) en México by Contreras Perera, Yamili Jazmin

“…The frequency of L410 increased from 1.18 to 2.63 for V1016 an increase was observed between 1.19 and 2.79 times, and C1534 was fixed in all strains after deltamethrin selection. …”
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Los estudiantes universitarios y la adicción al smartphone como causante de adicción tecnológica y de falta de habilidades comunicativas by Alvarado Pérez, José Gregorio Jr., García Retes, Carmen Dinorah

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Zonificación ecológica de una comunidad dentro de un área natural protegida en el suroeste de Zacatecas. by Delgadillo Escobar, Ariel Armando

“…To perform a multitemporal analysis of the change of land cover within the community and obtain habitat transformation rates, satellite images of Landsat missions were used to assess the effectiveness of the establishment of the NPA over time. …”
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Zonificación ecológica de una comunidad dentro de un área natural protegida en el suroeste de Zacatecas. by Delgadillo Escobar, Ariel Armando

“…To perform a multitemporal analysis of the change of land cover within the community and obtain habitat transformation rates, satellite images of Landsat missions were used to assess the effectiveness of the establishment of the NPA over time. …”
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Sistema de riego por goteo para palma de cocos by Barrios Vargas, Ofelia, Gallo Sánchez, Julio Cesar, Vazquez Barrios, Jesús Felipe, Rubio Cuevas, Adán

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Aspectos de la cobertura de la prensa escrita sobre la lucha del gobierno de México contra el narcotráfico by Villanueva, Oscar Mario Miranda, Ortiz, Ángel Iglesias

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Microbiota gastrointestinal y síndrome de intestino irritable by García Mazcorro, José Francisco, Cruz Valdez, Julio César, Marroquín Cardona, Alicia Guadalupe, Sánchez Casas, Rosa María

“…Microbiota is the correct word, defined as the community of living microorganisms residing in a determined ecological niche, and we use it, not only in the title, but throughout the article (79 times to be exact), whereas the less precise but commonly used flora is employed only 5 times.2 Secondly, the 16S ribosomal RNA (rRNA) gene is one of the components of the small subunit (30S) of the ribosome and is present in all bacteria and archaea. …”
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Estrategias alimentarias del coyote Canis latrans SAY, 1833, en una UMA del noreste de México by López Soto, Juan Homero

“…In order to achieve the former objectives a road of 21 kilometers was selected and visited to times each month, during this time 1117 feces were collected. …”
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