Maestría en Física Aplicada

Permanent URI for this collectionhttp://repositorio.uta.edu.ec/handle/123456789/34153

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Subject: search.filters.subject.MACHINE LEARNING

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    Evaluación con red neuronal del proceso de corte láser por CO 2 en materiales compuestos de fibra de cabuya
    (Universidad Técnica de Ambato. Facultad de Ingeniería en Sistemas, Electrónica e Industrial. Maestría en Física Aplicada, 2022) Almache Barahona, Verónica Carolina; Pérez Salinas, Cristian Fabián
    The application of Machine Learning today has allowed the development of learning models to solve problems in different fields of industry. This research work focused on relating neural networks (ANN) with the manufacture of composite materials (polyester matrix + fiber cabuya) and CO2 laser cutting machining. The objective is to develop a neural network to evaluate the application of machine learning to predict the surface finish characteristic of the material under study. The established cutting parameters were laser power and cutting speed. The surface finish characteristic to be evaluated was the surface roughness of the cut composite material. The sheet of the constructed composite material was subjected to CO2 laser cutting, which generated a set of 84 specimens. Experimental data was generated by measuring surface roughness through laboratory tests. The programming of the neural network was done with the Scikit-learn package. This is one of the most widely used open source libraries for machine learning available in Python. The results achieved by the prediction of the network based on the experimental data are related to the values predicted by the neural network model (ANN) and the performance of the network was evaluated using statistical metrics. The statistical results obtained were 0.946, 0.139 and 0.301 corresponding to the coefficient of determination (R2), the mean square error (MSE), and the mean absolute error (MAE) respectively. Therefore, it could be concluded that the performance of the developed neural network has a high validity and ability to predict surface roughness.
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    Evaluación con red neuronal del proceso de desgaste abrasivo de placas de un material compuesto de látex con partículas de caucho reciclado
    (Universidad Técnica de Ambato. Facultad de Ingeniería en Sistemas, Electrónica e Industrial. Maestría en Físisca Aplicada, 2022-02) Muñoz Valverde, Pablo Rafael; Pérez Salinas, Cristian Fabián
    In this thesis, a Machine Learning approach was investigated in the field of manufacturing new materials for industry. In particular, artificial neural networks were used to predict the Taber wear index (TDI) of latex plates and recycled rubber particles. In recent years, the application of Artificial Intelligence and in particular Machine Learning to scientific disciplines has increased substantially. The purpose was to evaluate how machine learning works, in particular neural networks, and how it should be applied to make a prediction. The preliminary phase of the work was to create the experimentally obtained data set necessary for the secondary phase, which includes the analysis and modeling of neural networks. The generation of the data set involved the manufacture of the material and wear tests based on the ISO 9352 standard. In the context of the neural network, the Google TensorFlow software was used through the Python3 interface. The model developed allows to predict the IDT of the plate taking as independent variables; the volumetric percentage of material, the rotational speed, applied load and the number of cycles. The performance of the network will be evaluated through statistical tests such as the mean square error (MSE), the mean absolute error (MAE) and the coefficient of determination (R2).