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1
artículo
Publicado 2023
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Recurrent flooding in the mining works, deficiencies in the operation of pumps, unforeseen stoppages, and lack of water availability in the processes, affect the operations in the subway mine. The traditional solution adopted is to wait for maintenance times for its post evacuation, generating stoppages, consumption of water from the wells and inefficiency in the daily water demand. Therefore, this article presents a new approach that will expand the traditional methods by introducing a prediction model using probabilistic methods. This approach will allow the design of an optimal water distribution system, the efficient control in the maintenance and covering of the recirculated water demand inside the mine. Variables describing problems related to pump flow, pressure zoning and the type of pump distribution, either in series or in parallel in the pumping system, will be determined. Als...
2
tesis de grado
Publicado 2019
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In the search for non-destructive inspection forms in fruit quality, in recent years there have been increased studies on the use of hyperspectral images in their quality. The objective of this investigation was to evaluate the level of prediction of quality parameters and maturity stage of the “Kent” mango by a model obtained using hyperspectral images. 120 mangoes were stored at four different temperatures (10, 12.5, 15 and 17.5 °C) at which images of both sides were taken in the near infrared range (890 - 1710 nm), one per day, for 12 days and with two repetitions for each fruit. Parallel to the taking of images, quality parameters such as firmness, color (ΔE*), brix degrees and moisture content were determined in the same mangoes. To obtain the model, the quality attributes were correlated with 70% of the spectral data resulting from the images using the partial least squares r...
3
tesis de grado
Publicado 2006
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Most of the problems concerning the fluids flow in conduits and tubes they imply the prediction of the conditions in a section of a system, when the conditions of some other section are known. In any section of this system, generally we are worried about the pressure of the fluid, the speed of the flow and the elevation of the section. In a line of pipe in series the loss of total energy is the sum of the great and small individual losses. This affirmation is in agreement with the principle of which the equation of the energy is a way to both take into account all the energy in the system between points. The nature parallel systems requires that the technique used for their analysis is different from which is used in series in the analysis of the systems. In general, a parallel system can have any number of branches. It stops most of the problems of this type, the objective is to determi...
4
tesis de maestría
In recent years, the number of applications of model predictive control (MPC) is rapidly increasing due to the better control performance that it provides in comparison to traditional control methods. However, the main limitation of MPC is the computational e ort required for the online solution of an optimization problem. This shortcoming restricts the use of MPC for real-time control of dynamic systems with high sampling rates. This thesis aims to overcome this limitation by implementing high-performance MPC solvers for real-time control of fast systems. Hence, one of the objectives of this work is to take the advantage of the particular mathematical structures that MPC schemes exhibit and use parallel computing to improve the computational e ciency. Firstly, this thesis focuses on implementing e cient parallel solvers for linear MPC (LMPC) problems, which are described by block-struct...
5
tesis de maestría
In recent years, the number of applications of model predictive control (MPC) is rapidly increasing due to the better control performance that it provides in comparison to traditional control methods. However, the main limitation of MPC is the computational e ort required for the online solution of an optimization problem. This shortcoming restricts the use of MPC for real-time control of dynamic systems with high sampling rates. This thesis aims to overcome this limitation by implementing high-performance MPC solvers for real-time control of fast systems. Hence, one of the objectives of this work is to take the advantage of the particular mathematical structures that MPC schemes exhibit and use parallel computing to improve the computational e ciency. Firstly, this thesis focuses on implementing e cient parallel solvers for linear MPC (LMPC) problems, which are described by block-struct...
6
tesis de maestría
In recent years, the number of applications of model predictive control (MPC) is rapidly increasing due to the better control performance that it provides in comparison to traditional control methods. However, the main limitation of MPC is the computational e ort required for the online solution of an optimization problem. This shortcoming restricts the use of MPC for real-time control of dynamic systems with high sampling rates. This thesis aims to overcome this limitation by implementing high-performance MPC solvers for real-time control of fast systems. Hence, one of the objectives of this work is to take the advantage of the particular mathematical structures that MPC schemes exhibit and use parallel computing to improve the computational e ciency. Firstly, this thesis focuses on implementing e cient parallel solvers for linear MPC (LMPC) problems, which are described by block-struct...
7
artículo
Publicado 2025
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Para estimar el impacto de los terremotos en áreas urbanas, los investigadores convencionalmente utilizan modelos simplificados de estructuras urbanas para simulaciones. Sin embargo, los avances recientes en tecnología ahora permiten predicciones de respuesta ante terremotos más precisas a través de modelos de alta fidelidad y gemelos digitales. Los programas convencionales de generación de mallas pueden producir modelos 3D generales, pero no están optimizados para simulaciones urbanas a gran escala, donde el refinamiento de la malla cerca de las interfaces de los materiales es esencial. En este estudio, desarrollamos un método eficiente basado en la triangulación de Delaunay para simulaciones a escala urbana mediante la partición del modelo 3D en subdominios. El método propuesto utiliza de manera integrada la información del modelo de elevación digital y del modelo de veloci...
8
objeto de conferencia
The present work was supported by grant 234-2015-FONDECYT (Master Program) from Cienciactiva of the National Council for Science, Technology and Technological Innovation (CONCYTEC-PERU) and the Office Research of Universidad Nacional de Ingeniería (VRI - UNI).
9
artículo
Publicado 2014
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The daily electric demand in Peruvian National Interconnected System-SEIN- has very particular trend, seasonality and characteristics external effects, a situation that complicates the process of estimating the short-term forecast. The aim of this paper is to formulate and calculate ARIMA models with External Events Analysis to achieve efficient forecasts of electricity demand each day, at total level and broken down by areas of the SEIN. The methodology is based on treating each time series using appropriate statistical-mathematical transformations to achieve stability in variance as regular seasonal averages, parallel external events to try to reach an optimal predictive model ARIMA each area of the electrical system of Peru (Central, South and North) and for each day of the week. The results demonstrate the predictive efficiency. Taking as a quality indicator forecast the Mean Absolut...
10
artículo
Publicado 2014
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The daily electric demand in Peruvian National Interconnected System-SEIN- has very particular trend, seasonality and characteristics external effects, a situation that complicates the process of estimating the short-term forecast. The aim of this paper is to formulate and calculate ARIMA models with External Events Analysis to achieve efficient forecasts of electricity demand each day, at total level and broken down by areas of the SEIN. The methodology is based on treating each time series using appropriate statistical-mathematical transformations to achieve stability in variance as regular seasonal averages, parallel external events to try to reach an optimal predictive model ARIMA each area of the electrical system of Peru (Central, South and North) and for each day of the week. The results demonstrate the predictive efficiency. Taking as a quality indicator forecast the Mean Absolut...
11
tesis de grado
Publicado 2021
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Low Density Parity Check codes presents itself as the dominant FEC code in terms of performance, having the nearest performance to the Shannon limit and proving its usefulness in the increasing range of applications and standards that already used it. Low power devices are not except of this rapid development, where it emerges the necessity of decoders of low power without totally sacrificing performance or resource usage. The present work details the devolopment of a LDPC decoder compliant with the DVB-S2 standard for digital television, motivated for its already established use in uplink and downlink satellite applications and its great performance at large code lengths. This research presents the study of the min-sum algorithm and the design of the elements that conform the core decoder, including both functional units (variable and check nodes), memory blocks and routing network. In ...
12
tesis de maestría
Publicado 2014
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Sensitivity and Specificity of four Diagnostic Radiographic Techniques Periapical lesions, is a study that was conducted on specimens of human skulls, in order to apply different radiographic techniques for the detection of periapical lesions in diagnostic upper first molar teeth. This prospective, cross-sectional comparative and observational study aimed to compare the sensitivity and specificity of four diagnostic radiographic techniques, such as conventional periapical radiography, applying the technique of the bisector and Parallelism, Digital Panoramic X-ray and CT Cone beam for detection of periapical lesions. The study sample consisted of 88 pieces specifically upper molar tooth belonging to 44 specimens of human skulls; the total sample only the cavity was performed to simulate periapical lesions in 60% of the total, while the remaining 40% remained intact on these samples diagno...
13
tesis de grado
Publicado 2022
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En la presente investigación, se ha optado minuciosamente las grandes disyuntivas que se han presentado desde el siglo XIX hasta el actual siglo XX, respecto a los cambios transformacionales y generacionales de la creación divina del ser humano por otros artificiales inventado por el hombre, y esto gracias a las ciencias biotecnológicas, donde utilizando los diferentes métodos y técnicas de reproducción humana asistida (TRHAS), se ha dado inicio al facilísimo procreativo del ser humano en aquellas personas de ambos sexos que adolecen de infertilidad y esterilidad, donde las ciencias sociales, la antropología y el derecho han quedado rezagados o exento del desarrollo tecnológico, en especial de la ingeniería genética. Por lo expuesto el derecho como ciencia social no puede ser impávido, ni analógico, sino más bien activo en el tiempo en comparación al desarrollo de las cien...
14
artículo
Publicado 2014
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La demanda diaria del Sistema Eléctrico Interconectado Nacional-SEIN, posee características muy peculiares de tendencia, estacionalidad y aleatoriedad, situación que complica al proceso de estimación de su pronóstico. El objetivo del presente trabajo consiste en formular y calcular modelos ARIMA con Análisis de Sucesos Externos, a fin de lograr pronósticos eficientes de la demanda eléctrica de cada día siguiente, a nivel total y desagregado por áreas. Un buen pronóstico de la demanda diaria garantiza el despecho eficiente y económico de generación y transmisión, así como el aseguramiento y calidad de la demanda sectorial nacional. El enfoque metodológico lo constituye el tratamiento de cada serie temporal objetivo, mediante transformaciones estadístico-matemáticas apropiadas para alcanzar estabilidad tanto en varianzas como en medias regulares y estacionales; paralelame...
15
tesis de grado
Publicado 2021
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Low Density Parity Check codes presents itself as the dominant FEC code in terms of performance, having the nearest performance to the Shannon limit and proving its usefulness in the increasing range of applications and standards that already used it. Low power devices are not except of this rapid development, where it emerges the necessity of decoders of low power without totally sacrificing performance or resource usage. The present work details the devolopment of a LDPC decoder compliant with the DVB-S2 standard for digital television, motivated for its already established use in uplink and downlink satellite applications and its great performance at large code lengths. This research presents the study of the min-sum algorithm and the design of the elements that conform the core decoder, including both functional units (variable and check nodes), memory blocks and routing network. In ...
16
tesis de maestría
Publicado 2023
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Los Anticuerpos (Ac.) Anti-Sm son específicos para el diagnóstico de Lupus eritematoso sistémico (LES) pero infrecuentes. Frente a una enfermedad autoinmune sistémica probable varias guías recomiendan un protocolo escalonado de estudio, que en la práctica clínica no siempre se cumple. El laboratorio de la “Asociación Española” (Montevideo-Uruguay), comenzó a utilizar el método de quimioluminiscencia (CLIA), observando en ocasiones reactividades Anti-Sm no esperadas. Los objetivos fueron determinar el “cut-off” óptimo del método de CLIA y comparar su desempeño diagnóstico con el ELISA para Ac. Anti-Sm. Se comparó el “cut-off” del CLIA con respecto al ELISA e Inmunofluorescencia indirecta (IFI, ANA HEp-2) utilizando un material de referencia. Se determinaron los Ac. Anti-Sm por método de CLIA y ELISA en 40 sueros de pacientes. Se calculó la sensibilidad, espec...
17
artículo
Publicado 2021
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Academic self-efficacy is a powerful predictor of academic success, yet there are several factors that predispose it. Because of this, an explanatory model is proposed using the self-regulation of academic activities, positive affection, and personality. Hierarchical multiple linear regression was used to support the predictive proposal of the model. The Specific Perceived Self-Efficacy Scale of Academic Situations, The Scale of Positive and Negative Experience, Subscale Self-Regulation of Activities of the Academic Procrastination Scale, and Mini International Personality Item Pool (MINI-IPIP) were used. High correlations were obtained in the self-regulation of activities, positive affection, and personality (extraversion, concientousness and openness to experience) to academic self-efficacy. The final predictive model explained 30.1% of the total variance of academic self-efficacy. In ...
