Search Results - "linear regression"

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    Statistically coherent calibration of X-Ray Fluorescence Spectrometry for major elements in rocks in minerals. by Verma, Surendra P., Verma, Sanjeet K., Rivera Gómez, María Abdelaly, Torres Sánchez, Darío, Díaz González, Lorena, Amezcua Valdez, Alejandra, Rivera Escoto, Beatriz Adriana, Rosales Rivera, Mauricio, Armstrong Altrin, John S., López Loera, Héctor, Velasco Tapia, Fernando, Pandarinath, Kailasa

    Published 2018
    “…We applied both the ordinary linear regression (OLR) and the new uncertainty weighted linear regression (UWLR) models for the calibration and comparison of a XRF machine through 59 geochemical reference materials (GRMs) and a procedure blank sample. )e mean concentration and uncertainty data for the GRMs used for the calibrations (Supplementary Materials) (available here) filewere achieved from an up-to-date compilation of chemical data and their processing from well-known discordancy and significance tests. )e drift-corrected XRF intensity and its uncertainty were determined from mostly duplicate pressed powder pellets. )e comparison of the OLR (linear correlation coefficient r∼0.9523–0.9964 and 0.9771–0.9999, respectively, for before and after matrix correction) and UWLR models (r∼0.9772–0.9976 and 0.9970–0.9999, respectively) clearly showed that the latter with generally higher values of r is preferable for routine calibrations of analytical procedures. …”
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    Pérdidas por intercepción de lluvia en el matorral espinoso tamaulipeco bajo diferentes intensidades de raleo. by García Ledezma, Yahaira Wegelmy

    Published 2018
    “…A total of 79 rainfall events along 18 months between the years 2016 to 2017 were registered, totaling 907.6 mm. Linear regression analysis showed that throughfall represented a 83, 70, 65 and 85% of the gross precipitation, for the thinning intensities 75, 50, 25 and 0%, respectively. …”
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    Pérdidas por intercepción de lluvia en el matorral espinoso tamaulipeco bajo diferentes intensidades de raleo. by García Ledezma, Yahaira Wegelmy

    Published 2018
    “…A total of 79 rainfall events along 18 months between the years 2016 to 2017 were registered, totaling 907.6 mm. Linear regression analysis showed that throughfall represented a 83, 70, 65 and 85% of the gross precipitation, for the thinning intensities 75, 50, 25 and 0%, respectively. …”
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    Tesis
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    Modeling foreign investment received in the colombian oil sector during the period 1996-2016 Modeling foreign investment received in the colombian oil sector during the period... by Callazo Antúnez, Ana María, Meñaca Guerrero, Indira, Lechuga Cardozo, Jorge Isaac, Medina Carrascal, HéctorJosé, Uribe Urán, Carlos Mario, Barragán Morales, Camilo Enrique

    Published 2019
    “…The link between this variable and another macroeconomic variable was identify within the parameters marked within the model of multiple linear regression. This research is quantitative, of an explanatory type and is framed within the paradigm of structuralism. …”
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    Visión empresarial a través del espíritu emprendedor de los estudiantes que cursan la unidad de aprendizaje del ámbito empresarial en la UANL, FACPYA (Business vision through its e... by Carrera Sánchez, María Margarita, Partida Puente, Abel, Villarreal Villarreal, Luis Alberto

    Published 2016
    “…The collected data was obtained from a questionnaire, validated and reliable; it was examined with the statistical package SPSS-V18. Using multiple linear regression, a goodness-of-fit test of the normal distribution, heterogeneity and linearity was performed. …”
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    Factors associated with anxiety in family caregivers of children with chronic diseases by Toledano Toledano, Filiberto, Moral de la Rubia, José

    Published 2018
    “…Furthermore, a multiple linear regression model with five psychosocial variables was established to predict family caregiver anxiety. …”
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    News website users in Mexico: factors influencing their loyalty by Dávila Garza, Horacio, Alarcón Martinez, Gustavo Juan, López Pérez, Jesús Fabián

    Published 2023
    “…In this sense, a multiple linear regression analysis was carried out on a sample of 344 surveys of adult residents in the cities of Mexico and Monterrey. …”
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    Optimization in preparation process of V₂O₅ using symbolic regression α-β. by González Campos, Guillermo

    Published 2019
    “…Genetic programming, artificial neural networks and linear regression were compared with symbolic regression in order to know which technique has better efficiency to generate models. …”
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    Factors influencing the missed nursing care in patients from a private hospital by Hernández Cruz, Raúl, Moreno Monsiváis, María Guadalupe, Cheverría Rivera, Sofía, Díaz Oviedo, Aracely

    Published 2017
    “…For the analysis, descriptive statistics, Spearman’s correlation and simple linear regression were used. Approval for the study was obtained from the ethics committee. …”
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    Cancer Mortality in Older Mexican Individuals (2000 – 2010) by González Santiago, Omar, Castillo Guzmán, Sandra, Palacios Ríos, Dionicio, Ramírez Cabrera, Mónica Azucena

    Published 2014
    “…Trend analysis was performed with a linear regression of the natural logarithm of the adjusted rate, and trends were evaluated with the Student´s t test. …”
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    Optimization in preparation process of V₂O₅ using symbolic regression α-β. by González Campos, Guillermo

    Published 2019
    “…Genetic programming, artificial neural networks and linear regression were compared with symbolic regression in order to know which technique has better efficiency to generate models. …”
    Get full text
    Tesis

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